[{"Question":"I'm using RabbitMQ to manage multiple servers executing long lasting tasks. Each server can listen to one or more queues, but each server should process only one task at a time.\nEach time I start a consumer in a server, I configure it with channel.basic_qos(prefetch_count=1) so that only one tasks is processed for the respective queue.\nSuppose we have:\n - 2 queues: task1, task2.\n - 2 servers: server1, server2.\n - Both servers work with task1 and task2.\nIf the next messages are produced at the same time:\n - messageA for tasks1\n - messageB for tasks2\n - messageC for tasks1\nWhat I expect:\n - messageA gets processed by server1\n - messageB gets processed by server2\n . messageC stays queued until one of the servers is ready (finishes its current task).\nWhat I actually get:\n - messageA gets processed by worker1\n - messageB gets processed by worker2\n - messageC gets processed by worker2 (WRONG)\nI do not start consumers at the same time. In fact, working tasks are constantly being turned on\/off in each server. Most of the time servers work with different queues (server1: tasks1, tasks2, task3; server2: tasks1, tasks5; server3: tasks2, tasks5; and so on).\nHow could I manage to do this?\nEDIT\nBased on Olivier's answer:\nTasks are different. Each server is able to handle some of the tasks, not all of them. A server could process only one task at a time.\nI tried using exchanges with routing_keys, but I found two problems: all of the servers binded to the routing key task_i would process its tasks (I need it to be processed only once), and if there is no server binded to task_i, then its messages are dropped (I need to remain queued until some server can handle it).","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":539,"Q_Id":44116020,"Users Score":0,"Answer":"Seems from the description you provide that the issue is due to your servers connecting to multiple queues at the same time. \nAs your prefetch count is set to 1, a server connected to 3 queues will consume up to 3 messages even though he will only be processing one at a time (per your description of processing).\nIt's not clear from your question whether there is a need for multiple queues or whether you could have all tasks end up in a single queue:\n\ndo all the servers consume all the tasks\ndo you need to be able to stop the processing of certain tasks\n\nIf you need\/wish to be able to \"stop\" the processing of certain tasks, or control the distribution of processing throughout your servers, you'll need to manage consumers in your servers to only have one active consumer at a time (otherwise you're going to block\/consume some messages due to prefetch 1).\nIf you do not need to control the processing of the various tasks, would be far simpler to have all of the messages end up in a single queue, and single consumer to that queue setup with prefetch one for each of your servers.","Q_Score":0,"Tags":"python,rabbitmq","A_Id":44122840,"CreationDate":"2017-05-22T14:50:00.000","Title":"RabbitMQ: multiple queues\/one (long) task at a time","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Goal\nTo track the program real time that user is interacting with.\nExpected output\nTo get the information of current process that user is interacting with.\nWhat I've done\nUsed psutil to list all the process and find the process that uses CPU most. But it resulted in returning python.exe, which was using most CPU because it was counting processes.  \nQuestion\nIs there any other way around to do the task without this kind of mistake?\nOr any keyword that I can google for would be nice, too.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":25,"Q_Id":44117162,"Users Score":1,"Answer":"I suppose figuring out why your own app itself is using all the CPU would be your first priority. :) My psychic powers suggest that you are polling the system constantly without sleeping.  Did you consider sleeping for a half second after enumerating processes?\nUsing CPU metrics isn't the best way to accomplish what you are after.  You didn't mention what OS you are, but if you are on Windows, then you want to be tracking the window in the foreground, as that is what the user is interacting with.  By getting the foreground HWND, you can likely map it back to process id and ultimately process name.  Not sure about Mac, but I bet there's an equivalent call.","Q_Score":0,"Tags":"python,process","A_Id":44117271,"CreationDate":"2017-05-22T15:50:00.000","Title":"Recognizing active process","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a web service that accepts post requests. A post request specifies a specific job to be executed in the background, that modifies a database used for later analysis. The sender of the request does not care about the result, and only needs to receive a 202 acknowledgment from the web service. \nHow it was implemented so far:\nFlask Web service will get the http request , and add the necessary parameters to the task queue (rq workers), and return back an acknowledgement. A separate rq worker process listens on the queue and processes the job.\nWe have now switched to aiohttp, and realized that the web service can now schedule the actual job request in its own event loop, by using the aiohttp.ensure_future() method.\nThis however blurs the lines between the web-server and the task queue. On the positive side, it eliminates the need of having to manage the rq workers.\nIs this considered a good practice?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":381,"Q_Id":44139153,"Users Score":0,"Answer":"If your tasks are not CPU heavy - yes, it is good practice.\nBut if so, then you need to move them to separate service or use run_in_executor(). In other case your aiohttp event loop will be blocked by this tasks and server will not be able to accept new requests.","Q_Score":2,"Tags":"python-3.x,celery,aiohttp","A_Id":51969202,"CreationDate":"2017-05-23T15:30:00.000","Title":"Background processes in the aiohttp event loop","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I am from electrical engineering and currently working on a project using UP-Board, I have attached LEDs, switch, Webcam, USB flash drive with it. I have created an executable script that I want to run at startup. \nwhen I try to run the script in terminal using the code sudo \/etc\/init.d\/testRun start it runs perfectly. Now when I write this command in terminal sudo update-rc.d testRun defaults to register the script to be run at startup it gives me the following error\n\ninsserv: warning: script 'testRun' missing LSB tags and overrides\n\nPlease guide me how to resolve this? I am from Electrical engineering background, so novice in this field of coding. Thanks a lot :)","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":24,"Q_Id":44140535,"Users Score":0,"Answer":"The thing to remember is that you run the script as you but like chron startup does not, so you need to:\n\nEnsure that the executable flags are set for all users and that it is in a directory that everybody has access to.\nUse the absolute path for every thing, including the script.\nSpecify what to run it with, again with the absolute path.","Q_Score":0,"Tags":"python","A_Id":44140659,"CreationDate":"2017-05-23T16:39:00.000","Title":"Error while Registering the script to be run at start-up, how to resolve?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"So I have a filesystem that is downloading some data, storing it in memory, and representing only completed downloads as files to the user. \nHowever, each download may take time to complete, so I don't want the user to have to wait for all the files to finish downloading. The way I do this is by choosing which 'files' to list in readdir. \nWhen I open nautlius to see the files, I only see the first few and have to refresh to see the rest.\nWhen I monitor the inotify activity, I noticed there are no CREATE events for the newly completed downloads. What do I need to do to create this notification?","AnswerCount":2,"Available Count":2,"Score":0.0996679946,"is_accepted":false,"ViewCount":212,"Q_Id":44144949,"Users Score":1,"Answer":"Inotify is concerned with calls on vfs level only, if you call fuse operations within a fuse filesystem, inotify would not know about this.","Q_Score":1,"Tags":"python,fuse,inotify","A_Id":44539296,"CreationDate":"2017-05-23T21:01:00.000","Title":"inotify CREATE notification with fusepy","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"So I have a filesystem that is downloading some data, storing it in memory, and representing only completed downloads as files to the user. \nHowever, each download may take time to complete, so I don't want the user to have to wait for all the files to finish downloading. The way I do this is by choosing which 'files' to list in readdir. \nWhen I open nautlius to see the files, I only see the first few and have to refresh to see the rest.\nWhen I monitor the inotify activity, I noticed there are no CREATE events for the newly completed downloads. What do I need to do to create this notification?","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":212,"Q_Id":44144949,"Users Score":0,"Answer":"You need IN_CLOSE_WRITE. From inotify man page:\n\nIN_CLOSE_WRITE (+)\nFile opened for writing was closed.","Q_Score":1,"Tags":"python,fuse,inotify","A_Id":44150850,"CreationDate":"2017-05-23T21:01:00.000","Title":"inotify CREATE notification with fusepy","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Trying to install cx_Oracle on Solaris11U3 but getting ld: fatal: file \/oracle\/database\/lib\/libclntsh.so: wrong ELF class: ELFCLASS64 error\npython setup.py build\nrunning build\nrunning build_ext\nbuilding 'cx_Oracle' extension\ncc -DNDEBUG -KPIC -DPIC -I\/oracle\/database\/rdbms\/demo -I\/oracle\/database\/rdbms\/public -I\/usr\/include\/python2.7 -c cx_Oracle.c -o build\/temp.solaris-2.11-sun4v.32bit-2.7-11g\/cx_Oracle.o -DBUILD_VERSION=5.2.1\n\"SessionPool.c\", line 202: warning: integer overflow detected: op \"<<\"\ncc -G build\/temp.solaris-2.11-sun4v.32bit-2.7-11g\/cx_Oracle.o -L\/oracle\/database\/lib -L\/usr\/lib -lclntsh -lpython2.7 -o build\/lib.solaris-2.11-sun4v.32bit-2.7-11g\/cx_Oracle.so\nld: fatal: file \/oracle\/database\/lib\/libclntsh.so: wrong ELF class: ELFCLASS64\nerror: command 'cc' failed with exit status 2\nTried all available information on the internet:\nInstalled gcc\nInstalled solarisstudio12.4\nInstalled instantclient-basic-solaris.sparc64-12.2.0.1.0, instantclient-odbc-solaris.sparc64-12.2.0.1.0\nSet LD_LIBRARY_PATH to oracle home directory:instantclient_12_2\/\nSame issue seen while installing DBD:Oracle perl module.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":268,"Q_Id":44155943,"Users Score":0,"Answer":"You cannot mix 32-bit and 64-bit together. Everything (Oracle client, Python, cx_Oracle) must be 32-bit or everything must be 64-bit. The error above looks like you are trying to mix a 64-bit Oracle client with a 32-bit Python.","Q_Score":0,"Tags":"python,cx-oracle","A_Id":44171743,"CreationDate":"2017-05-24T10:37:00.000","Title":"Python module cx_Oracle ld installation issue on Solaris11U3 SPARC: fatal: file \/oracle\/database\/lib\/libclntsh.so: wrong ELF class: ELFCLASS64 error","Data Science and Machine Learning":0,"Database and SQL":1,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am using Django 1.2 template tags over webapp framework in Google App engine. I intend to migrate over to Webapp2.  I was looking for a way to this in webapp2, but did not find a template engine for webapp2. So, should I continue with webapp's template engine or use pure Django template engine.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":109,"Q_Id":44158025,"Users Score":2,"Answer":"Many people use Jinja templates with webapp2 in GAE, but you can also use Django templates.  The two template systems are very similar so it is fairly easy to switch between the two.\nThe template system that you use is quite independent of webapp2.  It works like this:\n\nRender your template to get a string representation of your HTML page\nTransmit the string with webapp2\n\nFeel free to use Jinja, Django, or any other templating system.  Webapp2 doesn't provide templates because it is not part of its job.","Q_Score":0,"Tags":"python,google-app-engine,django-templates,webapp2","A_Id":44158851,"CreationDate":"2017-05-24T12:08:00.000","Title":"Is there any way to use Django templates in Webapp2 framework in Google App Engine","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I have a python script: \/usr\/bin\/doxypy.py\nI have added #!\/usr\/local\/bin\/python as first line and given full permission to script with chmod 777 \/usr\/bin\/doxypy.py.\nIf I want to run it as a linux command, let's say, I want to run it with only doxypy, is there any way to achieve this?","AnswerCount":3,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":1422,"Q_Id":44167842,"Users Score":2,"Answer":"Yes, rename it to \/usr\/bin\/doxypy","Q_Score":2,"Tags":"python,python-2.7","A_Id":44167881,"CreationDate":"2017-05-24T20:24:00.000","Title":"How can I run python script as linux command","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a python script: \/usr\/bin\/doxypy.py\nI have added #!\/usr\/local\/bin\/python as first line and given full permission to script with chmod 777 \/usr\/bin\/doxypy.py.\nIf I want to run it as a linux command, let's say, I want to run it with only doxypy, is there any way to achieve this?","AnswerCount":3,"Available Count":2,"Score":0.0665680765,"is_accepted":false,"ViewCount":1422,"Q_Id":44167842,"Users Score":1,"Answer":"Rename the file to doxpy and put it in a folder of $PATH, e.g. \/usr\/bin","Q_Score":2,"Tags":"python,python-2.7","A_Id":44167906,"CreationDate":"2017-05-24T20:24:00.000","Title":"How can I run python script as linux command","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I want to understand this difference between interpreted languages and compiled languages. Lot of explanation is found online and I understand all of them.\nBut question is, softwares are distributed as exe(on windows) as final products.\nSo if I write my program in Python\/Java and compile it to exe, would that work as fast as if I had written and compiled in C\/C++?","AnswerCount":3,"Available Count":1,"Score":0.0665680765,"is_accepted":false,"ViewCount":791,"Q_Id":44173237,"Users Score":1,"Answer":"In practice no.\nThe languages C\/C++ were written as a better assembler.  Their underlying operations have been designed to have a good fit with the processors of the 1970.\nSubsequently, processors have been driven to run quickly, and so they have been designed around instructions which can make C\/C++ faster.\nThis close linking with the semantics of the language and the silicon, has given a headstart to the C\/C++ community.\nAn example of the C\/C++ advantage, is how simple types and objects can be created on the stack.  The stack is implemented as a processor stack, and objects will only be valid whilst their callstack is current.  \nJava\/python implement all their objects on the free-store, having lambdas and closures which stretch the lifespan of their objects beyond the call-stack which create them.  The free-store is a more-costly way of creating objects, and is one of the penalties the language take.\nJIT compiling the java\/python bytecode, can make up some of the difference, and (theoretically) beat the performance of the C\/C++ code.\nWhen JIT compiled, a language is compiled based on the processor on the box (with possibly better features than when the code was written), with knowledge of the exact data that is being used with the code.  This means the Jit compiler is tuned to the exact usage of the code.  Rather than a compiler's best guess.","Q_Score":1,"Tags":"python,c++,compilation,interpreted-language","A_Id":44173717,"CreationDate":"2017-05-25T05:51:00.000","Title":"Does Python\/Java program work as fast as C if I convert both of them into exe?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Where is the python installation location specified for Python interpreter in Zeppelin?\nHow to change the python installation location for Python interpreter with new python installation directory in Zeppelin?\nHelp would be much appreciated.\nThanks.","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":81,"Q_Id":44213136,"Users Score":1,"Answer":"It worked.\nI have set \"zeppelin.python\" as \/mnt\/reference\/softwares\/anaconda27\/bin\/python in %python interpreter section.","Q_Score":0,"Tags":"python,apache-zeppelin","A_Id":44213558,"CreationDate":"2017-05-27T05:02:00.000","Title":"How to change the python installation location for Python interpreter in Zeppelin?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm running MacOS Sierra 10.12.4 and I've realized that homebrew python was upgraded to version 2.7.13. How can I switch back to 2.7.10?","AnswerCount":5,"Available Count":1,"Score":-0.0399786803,"is_accepted":false,"ViewCount":47780,"Q_Id":44217507,"Users Score":-1,"Answer":"This is not a direct answer to the question, rather it explains a solution to avoid touching the system python. \nThe general idea is that you should always install the independent python for your projects. Each project needs its own python version (for compatibility reasons with libraries), and it's not practical to keep one python version and trying to make it work with multiple projects. \nI assume this issue in your system happened because another project required a higher python version and now for your other project you need a lower version python. \nThe best way to handle python versions is to use virtualenv. \nEach project will have it's own python, so you can have projects that work with python 2.7 and python 3 and they never touch each other's dependency. \nInstall different python versions with homebrew and then for each project when you create virtualenv you decide which python to pick. Everytime you work with that project, the python version would be the one you picked yourself when created the virtualenv.","Q_Score":18,"Tags":"python,macos,homebrew","A_Id":44484184,"CreationDate":"2017-05-27T13:36:00.000","Title":"MacOS: How to downgrade homebrew Python?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to add xmltodict package to Python on Linux.\nI have 2 installations of Python on my Linux build; Python 2.7 (default) and Python 3.5 (in the form of an Anaconda installation).  I want to add xmltodict to the Python 3 installation, but when I use sudo apt-get install python-xmltodict it adds it to the default Python 2.7 installation.  \nHow can I get apt to add this package to my Python 3 installation without changing the default or using pip? I do not want to have to rebuild my installation with a virtual environment either","AnswerCount":2,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":138,"Q_Id":44241532,"Users Score":1,"Answer":"if you want to do it with pip or easy-install, you can run pip2\/pip2.7 and install it. It will be installed for Python which was used to run pip...","Q_Score":0,"Tags":"python,linux,apt-get,xmltodict","A_Id":44242318,"CreationDate":"2017-05-29T11:34:00.000","Title":"Add package to specific install of Python in Linux","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to use cv2.VideoCapture to capture image from a docker container.\nimport cv2\nvid = cv2.VideoCapture('path\\to\\video')\nret, frame = vid.read()\nIn terms of the video file,\nI have tried \neither mount the file with docker -v\nor docker cp to copy the video file into container,\nbut both with no luck (ret returns False).\nShould I add any command when launching the container?\nThanks in advance.","AnswerCount":1,"Available Count":1,"Score":-0.1973753202,"is_accepted":false,"ViewCount":1491,"Q_Id":44242760,"Users Score":-1,"Answer":"There might be 2 problems:\n1) In your container opencv is not installed properly. To check that do print(ret, frame). If they come (false, None). Then opencv has not installed properly. \n2) The file you are using is corrupted. To check that try to copy any image file (jpg) into the container and use cv2.imread to read the image and then print it. If numpy array comes then while copying your file is not getting corrupted. \nThe best option is pull any opencv + python image and then create a container with it. The better option is use dockerfiles of these images to create the container.","Q_Score":2,"Tags":"python,opencv,docker,video-capture","A_Id":44807718,"CreationDate":"2017-05-29T12:40:00.000","Title":"cv2.VideoCapture doesn't work within docker container","Data Science and Machine Learning":1,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have couple of file with same name, and I wanted to get the latest file \n[root@xxx tmp]# ls -t1 abclog*\nabclog.1957\nabclog.1830\nabclog.1799\nabclog.1742\nI can accomplish that by executing below command.\n[root@xxx tmp]# ls -t1  abclog*| head -n 1\nabclog.1957\nBut when I am trying to execute the same in python , getting error :\n\n\n\nsubprocess.check_output(\"ls -t1 abclog* | head -n 1\",shell=True)\n      ls: cannot access abclog*: No such file or directory\n      ''\n\n\n\nSeems it does not able to recognize '*' as a special parameter. How can I achieve the same ?","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":260,"Q_Id":44243853,"Users Score":0,"Answer":"Make sure you execute this in the directory where the files exist. If you just fire up Idle to run this code, you will not be in that directory.","Q_Score":0,"Tags":"python,shell,subprocess","A_Id":44243964,"CreationDate":"2017-05-29T13:35:00.000","Title":"how to use subprocess.check_output() in Python to list any file name as \"abc*\"","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have been struggling with how to pass requisite parameters to snakebite utility for it to be able to access a kerberized cluster. I have tried setting the necessary conf dir in the \/usr\/local\/etc\/hadoop path, as well as initialising and getting a ticket using kinit.\nAny help or working example in this regards would be greatly appreciated.\nNOTE: I have tested that the environment setup is proper by using 'hadoop' CLI to access the cluster from the same machine.","AnswerCount":2,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":387,"Q_Id":44268109,"Users Score":1,"Answer":"You must kinit with proper keytab is enough.  It will take automatically by the principal name to fetch results.","Q_Score":0,"Tags":"python,snakebite","A_Id":63066582,"CreationDate":"2017-05-30T17:09:00.000","Title":"How to access kerberized cluster using snakebite python client","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am currently using a angular4 projected generated by angular-CLI to create the project structure and I was able to serve it using ng-serve and develop and see changes. Now I would like to move it to being hosted on my own backend, using google app engine and webApp2 and run it using dev_appserver.py app.yaml. Currently the only way I can get it to work is by doing an ng-build and serving the files out of the dist folder. I would like to make it so I can easily make changes but not have to wait for it to rebuild each time.","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":468,"Q_Id":44271174,"Users Score":1,"Answer":"You can use enviroment on angular in order to point you python rest service and another enviroment to production.\nExample:\nenviroment.ts\n\nexport const environment = {\n  production: false,\n  urlServices: 'http:\/\/190.52.112.41:8075'\n};\n\nenviroment.prod.ts\n\nexport const environment = {\n  production: true,\n  urlServices: 'http:\/\/localhost:8080'\n};\n\nIn this way , you dont need to compile to test you aplication because angular always will be pointed to you python app.","Q_Score":0,"Tags":"python,angular,google-app-engine,angular-cli,google-app-engine-python","A_Id":44271728,"CreationDate":"2017-05-30T20:17:00.000","Title":"Angular4 and WebApp2 on google App engine","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"Greeting all!\nI'm learning Google's Python class on my own. I have one quick question about the Baby Names Exercise.\nIn the py file provided, there are lines like this:\nif not args:\n    print 'usage: [--summaryfile] file [file ...]'\n    sys.exit(1)\nI can understand it wants to show you what to type in cmd when using the code. However the format of \"[--summaryfile] file [file ...]\" confuses me. What does the square brackets in \"[--summaryfile]\" and \"[file ...]\" mean? Lists? Or something else? What should I type in the Windows cmd when running the code? Some examples would be very helpful.\nThank you very much in advance!","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":241,"Q_Id":44295930,"Users Score":0,"Answer":"In command line application documentation, square brackets usually denote optional arguments (that goes beyond Python).","Q_Score":0,"Tags":"python","A_Id":44295964,"CreationDate":"2017-05-31T22:58:00.000","Title":"Python usage: [--summaryfile] file [file ...]","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Greeting all!\nI'm learning Google's Python class on my own. I have one quick question about the Baby Names Exercise.\nIn the py file provided, there are lines like this:\nif not args:\n    print 'usage: [--summaryfile] file [file ...]'\n    sys.exit(1)\nI can understand it wants to show you what to type in cmd when using the code. However the format of \"[--summaryfile] file [file ...]\" confuses me. What does the square brackets in \"[--summaryfile]\" and \"[file ...]\" mean? Lists? Or something else? What should I type in the Windows cmd when running the code? Some examples would be very helpful.\nThank you very much in advance!","AnswerCount":2,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":241,"Q_Id":44295930,"Users Score":1,"Answer":"It means that those parts are optional.  You can supply or omit the option name --summaryfile.  Then you supply a list of as many files as you want.\nThis is ancient command description syntax, going back to the days of IBM mainframe operating systems in the 1960s.  Most documentation assumes that you've seen (or can find) a description somewhere, and most supply it in the front of the global reference manual ... wherever that might be.","Q_Score":0,"Tags":"python","A_Id":44295966,"CreationDate":"2017-05-31T22:58:00.000","Title":"Python usage: [--summaryfile] file [file ...]","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"When I try to open .py files with IDLE (right click and \"edit with IDLE\"), Windows will ask whether to use python.exe to open this file. If I choose python, IDLE won't start properly.\nIf I use \"open with\" and navigate to Python27\\Lib\\idlelib\\idle.bat I'll get an error:\n\nWindows cannot find 'C:\\Python27\\Lib\\idlelib....\\pythonw.exe\n\nIf I start IDLE from start menu, Windows will open the installer and say \"Please wait while Windows configures Python 2.7.13 (64-bit)\" and if I have the Python installation file available, it will say \"Error writing to file C:\\Python27\\pythonw.exe\".\nStarting IDLE from CMD (eg. >>python.exe C:\\Python27\\Lib\\idlelib\\idle.py) works normally.\nI don't see pythonw.exe under C:\\Python27\\. Should it be there and how would it delete itself?\nI'm using Windows 10 and this issue started a while back. I did a complete reinstall of python and packages and the issue was fixed for a short while, but it returned today.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":1122,"Q_Id":44305806,"Users Score":3,"Answer":"Okay, I've installed Process Monitor and set up filters to monitor the Python folder. Turns out Avast has been busy deleting pythonw.exefor a couple of months now.\nIt happened sparsely in the beginning, but last 12 deletes were from the past few days.\nFIXED","Q_Score":2,"Tags":"python,windows,python-2.7,windows-10,python-idle","A_Id":44307874,"CreationDate":"2017-06-01T11:03:00.000","Title":"Python IDLE doesn't work because python.exe is missing","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have windows-7 64 bit machine and Python3.6.1(32-bit) installed on it. I wanted to try spyder as IDE for python. I don't have Anaconda or anything like that. So, I installed spyder from command line (cmd.exe) and it did install successfully and prompt returned. \nI think it is installed because \n\nI can see spyder3.exe under C:\\Users\\UserName\\AppData\\Local\\Programs\\Python\\Python36-32\\Scripts\nFrom cmd.exe when I enter spyder3 it doesn't throw any error and a rotating circle appears which indicates something is processing. But nothing is launched.\nAfter running spyder3 from cmd.exe though nothing gets launched except the rotating circle for couple of seconds, I see spyder.lock folder under C:\\Users\\UserName\\.spyder-py3\nWhen I delete spyder.lock folder under C:\\Users\\UserName\\.spyder-py3 and run spyder3 again in cmd.exe the folder is created again.\n\nQuestion: How can I make spyder launch? Did I do something wrong while installing spyder or am I trying to launch it with an incorrect method?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":983,"Q_Id":44317175,"Users Score":3,"Answer":"I had to install PyQt5. It is a requirement for spyder on windows and I was missing it. After I installed it I can launch spyder3 from cmd.exe","Q_Score":1,"Tags":"windows,python-3.x,cmd","A_Id":44373756,"CreationDate":"2017-06-01T21:14:00.000","Title":"Issue in launching spyder that was installed using pip install on Python 3.6.1","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I want to start using the RIDE tool for automation but I am currently unable to launch it from the command prompt. The following are what I have installed.\n\nPython 2.7.11 (32bit) \nWx Python 2.8.12.1(unicode) for Python 2.7 \nrobotframework 3.0.2 (pip installed)\nrobotframework-ride 1.5.2.1 (pip installed)\n\nWhen I launch ride.py from cmd, it opens up a word file which has the same ride.py which is installed in the C:\\Python27\\Scripts folder.\nThe same setup works on a different machine. I don't understand why in this machine, it opens up a word document instead of launching RIDE","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":1827,"Q_Id":44335270,"Users Score":0,"Answer":"Do a right click on ride.py and choose python as default program.","Q_Score":1,"Tags":"python-2.7,robotframework","A_Id":44404547,"CreationDate":"2017-06-02T18:24:00.000","Title":"Unable to Launch RIDE from command prompt","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have 3 devices connected to my computer and I want to run pytest in parallel on each of them.\nI there any way to do it, either with pytest or with adb?\nThanks in advance.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":264,"Q_Id":44343975,"Users Score":0,"Answer":"I think you have to use Selenium Grid for runs on multiple devices.","Q_Score":1,"Tags":"python,parallel-processing,automated-tests,adb,pytest","A_Id":70539100,"CreationDate":"2017-06-03T12:34:00.000","Title":"Running Pytest on Multiple Devices in Parallel","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a situation where if I run Apache with wsgi (now uninstalled), a test website works, but running the same server with runserver 0.0.0.0:8080 gives ERR_CONNECTION_REFUSED from local or remote (even with the apache2 service stopped).\nEdit: I don't think it's Apache, I've reproduced the problem on a clean server with no Apache installed, so unless Apache somehow modified something under source control it's not that\nMy knowledge of web details is hazy, I don't even know where to troubleshoot this problem - the devserver runs (runserver prints as expected and doesn't give any errors) but never receives a request, I have nothing in iptables.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":246,"Q_Id":44358803,"Users Score":0,"Answer":"Sorry for anyone who read this, it would probably have been impossible to solve given my supplied information.\nWhat had actually happened was that I'd been having to modify my wsgi.py script in order to make it happy inside the Apache server, and I'd added a line which said \"os.system('\/bin\/bash --rcfile )\" to try and make sure that when running inside apache it got the virtualenv activated.\nThis line must have been causing some strange problem, another symptom was that I realised when I was running \"runserver\", it wasn't crashing the the python process was backgrounding itself, where normally it runs inside that console window.\nThanks everyone who asked questions helping me debug!","Q_Score":0,"Tags":"python,django,apache,wsgi","A_Id":44366981,"CreationDate":"2017-06-04T21:10:00.000","Title":"django devserver can't connect","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I want to get eta of task in celery each time with get request. There is no direct api in celery to get task scheduled time (except inspect() - but it's seems very costly to me)\nHow can i manage eta of particular task? The downside of storing eta time in Django model is not consistent ( either i couldnt store taks_id because i can't -  dont know how get eta from task_id)\nI see on one question that there is no api, cause it somehow depends on brokers and etc. But i hope that there is some solution\nSo what's the best way manage task_id to get eta? \nBackend and broker is redis","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":429,"Q_Id":44367961,"Users Score":0,"Answer":"I don't think there is a magic way to do this.\nWhat I do in my app is just log the execution time for each task and return that as an ETA. If you wanted to get a little more accurate you could also factor in the redis queue size and the task consumption rate.","Q_Score":0,"Tags":"python,redis,celery,estimation","A_Id":44961359,"CreationDate":"2017-06-05T11:28:00.000","Title":"Celery best way manage\/get eta of task","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I have a few django micro-services.\nTheir main workload is constant background processes, not request handling.\nThe background processes constantly use Django's ORM, and since I needed to hack a few things for it to work properly (it did for quite a while), now I have problems with the DB connection, since Django is not really built for using DB connections a lot in the background I guess...\nCelery is always suggested in these cases, but before switching the entire design, I want to know if it really is a good solution.\nCan celery tasks (a lot of tasks, time-consuming tasks) use Django's ORM in the background without problems?","AnswerCount":3,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":1506,"Q_Id":44368133,"Users Score":0,"Answer":"Celery was originally written specifically as an offline task processor for Django, and although it was later generalised to deal with any Python code it still works perfectly well with Django.\nHow many tasks there are and how long they take is pretty much irrelevant to the choice of technology; each Celery worker runs as a separate process, so the limiting resource will be your server capacity.","Q_Score":0,"Tags":"python,django,celery","A_Id":44368455,"CreationDate":"2017-06-05T11:38:00.000","Title":"Use Django's ORM in Celery","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I have a few django micro-services.\nTheir main workload is constant background processes, not request handling.\nThe background processes constantly use Django's ORM, and since I needed to hack a few things for it to work properly (it did for quite a while), now I have problems with the DB connection, since Django is not really built for using DB connections a lot in the background I guess...\nCelery is always suggested in these cases, but before switching the entire design, I want to know if it really is a good solution.\nCan celery tasks (a lot of tasks, time-consuming tasks) use Django's ORM in the background without problems?","AnswerCount":3,"Available Count":2,"Score":0.1973753202,"is_accepted":false,"ViewCount":1506,"Q_Id":44368133,"Users Score":3,"Answer":"Can celery tasks (a lot of tasks, time-consuming tasks) use Django's ORM in the background without problems?\n\nYes, depending on your definition of \u201cproblems\u201d :-)\nMore seriously: The Django ORM performance will be mostly limited by the performance characteristics of the underlying database engine.\nIf your chosen database engine is PostgreSQL, for example, you will be able to handle a high volume of concurrent connections.","Q_Score":0,"Tags":"python,django,celery","A_Id":44382660,"CreationDate":"2017-06-05T11:38:00.000","Title":"Use Django's ORM in Celery","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I would like to know whether I could return a pdf as a response to Google App Engine Endpoints for Python.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":40,"Q_Id":44404237,"Users Score":0,"Answer":"Responses from Google Cloud Endpoints APIs must be of content-type application\/json. You could bundle the binary data of the PDF in a JSON value by encoding it with base64.","Q_Score":0,"Tags":"python,google-app-engine,google-cloud-endpoints","A_Id":44442742,"CreationDate":"2017-06-07T05:30:00.000","Title":"What are the supported return types for Google App Engine Endpoints for Python?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"Why we add 2  directory path in windows environment variableC:\\Python27\\;C:\\Python27\\Scripts\\ ?\nIs C:\\Python27\\ is not sufficient ?\nAny helpful answer will be appreciated !","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":54,"Q_Id":44407686,"Users Score":1,"Answer":"sys does not do a recursive lookup because that is wasteful. Explicitly specify the complete path to ONLY the directories\/sub-directories you want to include in your PATH, and python will only look for modules to import there.","Q_Score":1,"Tags":"python,python-2.7,python-3.x","A_Id":44407755,"CreationDate":"2017-06-07T08:40:00.000","Title":"Why we add 2 directories path in Python in Windows environment variable","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am developing a django application which handles lots of file uploads from multiple clients periodically. Each file is around 1 to 10 megabytes.\nSince uploads are thread blocking I can only serve a number of requests equivalent to the number of uwsgi workers\/processes (4 in my case).\nWhat should I do to increase throughput?\nIs it advisable to increase number of processes\/workers in uwsgi? \nWhat should be the upper limit? \nIs there any other solution that I can use in this scenario?\nStack: django+uwsgi+nginx running on amazon ec2 and s3 buckets used for storing zip files.","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":700,"Q_Id":44411632,"Users Score":0,"Answer":"What should be the upper limit?\n\nThat depends on your hardware such as quantity of core in your server\n\nIs there any other solution that I can use in this scenario?\n\nConsider using Celery\/rabbitMQ. Celery could be used to process asynchronously file or upload to S3 and notify the events to rabbitMQ","Q_Score":1,"Tags":"python,django,amazon-s3,uwsgi","A_Id":44416796,"CreationDate":"2017-06-07T11:40:00.000","Title":"Django - Handling several file upload requests at a time?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I am trying to understand how docker is useful outside of the webapp space.\nIf for example someone wants to run a python script which downloads global weather data every 12 hours, why would they use docker?\nWhat is the advantage of using docker to Linux LXC\/LXD containers?\nI am struggling to understand the benefits of using Docker.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":2216,"Q_Id":44416700,"Users Score":10,"Answer":"If for example someone wants to run a python script which downloads global weather data every 12 hours, why would they use docker?\n\nI wouldn't, in this case. set up a cron job to run the script.\n\nWhat is the advantage of using docker to Linux LXC\/LXD containers?\n\nDocker was originally built on top of LXC containers. Since then, it has moved to a newer standard, libcontainer.\nThe major benefit here, is cross-platform compatibility with a much larger ecosystem.\nThe world of linux containers with lxc probably still has a place, but Docker is quickly bringing containers to everyone and not just linux users.\n\nI am struggling to understand the benefits of using Docker.\n\nfor me, the big advantage i see in docker is in my development efforts. i no longer have to worry about older projects that require older runtime libraries and dependencies. it's all encapsulated in docker.\nthen there's the production scaling and deployment story. with the community and user base around docker, there are simple solutions for nearly every scenario - from one server deployments, to auto-scaling and netflix level stuff that i'll never get near.\n\nI'm just finding it difficult to understand Docker outside of a webapp server context\n\nthink slightly more broadly to any app or process that runs continuously, providing an API or service for other applications to consume. it's typically web based services, yes, but any TCP\/IP or UDP enabled process should be able to work.\ndatabase systems, cache systems, key-value stores, web servers... anything with an always running process that provides an API over TCP\/IP or UDP.\nthe big benefit here is encapsulating the service and all of it's runtime dependencies, like i was saying before.\nneed to run MongoDB 2.3 and 3.2 on your server? no problem. they are both in separate containers, can both run independently.\nwant to run mysql for this app, and mongo for that app? done.\ncontainerization is powerful in helping keep apps separate from each other, and in helping to reduce the \"works on my machine\" problem.","Q_Score":7,"Tags":"python,docker,containers,lxc,lxd","A_Id":44417108,"CreationDate":"2017-06-07T15:18:00.000","Title":"How is docker useful for non webapp applications (e.g. Python scripts)? What is the advantage of using it over LXC\/LXD?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Having the command\ngit --no-pager log -m --first-parent --no-renames --reverse --name-status --pretty=oneline --full-index\n\nis there any way to also get the blob hash for each file at that particular commit, next to the \"name status\"?\nThe command is used in a deployment pipeline for some huge repositories, so whatever the solution, I aim at keeping it fast, meaning: not spawning new processes.\nIf not possible, an acceptable approach would be to use a python library \/ binding. If you think that's the best approach, then please point to some key API calls which I'd need.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":426,"Q_Id":44457336,"Users Score":1,"Answer":"If I remove --name-status and add --raw, I see a format where each individual blob has a before...  after... hash.","Q_Score":0,"Tags":"python,git","A_Id":44457468,"CreationDate":"2017-06-09T12:02:00.000","Title":"git log show file blob id","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I was researching on whether or not Python can replace Bash for shell scripting purposes. I have seen that Python can execute Linux commands using subprocess.call() or os.system(). But I've read somewhere (forgot the link of the article) that using these is a bad thing. Is this really true? \nIf yes, then why is it a bad thing? \nIf not, then is it safe to say that Python can indeed replace Bash for scripting since I could just execute Linux commands using either of the 2 function calls?\nNote: If I'm not mistaken, os.system() is deprecated and subprocess.call() should be used instead but that is not the main point of the question.","AnswerCount":2,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":3744,"Q_Id":44459737,"Users Score":1,"Answer":"In general it is not a bad thing to create another process from your own process.\nPeople do this constantly on the bash.\nHowever, one always should ask oneself what is the best environment to do the task you need to do.\nFor instance I could easily call a python script to cut (the linux tool) a column from a file. However, the overhead to first open the python interpreter, then save the output from cut, and then save that again is possibly higher than checking how to use the bash-tool with man.\nHowever, collecting output from another \"serious\" program to do further calculations on that output, yes, you can do that nicely with subprocesses (though I would opt for storing that output in a file and then just read in the file if I need to rerun my script).\nAnd this is where launching a subprocess may get tricky: depending on how you open a new subprocess, you can not rely anymore on environment variables.\nEspecially when dealing with large input data, the output from the subprocess does not get piped further and therefore is collected in memory until the program finished, which might lead into a memory problem.\nTo put it short: if using python solves your problem faster than combining bash-only tools, sure, do it. If that involves launching serious subprocesses, ok. However, if you want to replace bash with python, do not do that.","Q_Score":6,"Tags":"python,linux,scripting","A_Id":44460033,"CreationDate":"2017-06-09T13:58:00.000","Title":"Is it bad to use subprocess.call() or os.system() when writing Python shell scripts?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I wrote !cat array.txt , and the result was: \n\nERROR: 'cat' is not recognized as an internal or external command,\n  operable program or batch file.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":464,"Q_Id":44461622,"Users Score":0,"Answer":"Try this command\n%cat array.txt","Q_Score":0,"Tags":"python,jupyter","A_Id":53287898,"CreationDate":"2017-06-09T15:30:00.000","Title":"Jupyter notebook is not able to execute unix command (i.e. ls,pwd etc)?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I want to write a Python script to automatically unzip lots of apk files and then do static analysis. However, when I unzip some apk files, unzip prompted that \"Press 'Q' to quit, or any other key to continue\". \nBecause it's a script and I haven't press any key then the script hangs. Any command option can solve this problem? Or do I have to handle it in Python? Thanks in advance :D","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":292,"Q_Id":44479568,"Users Score":0,"Answer":"I just ran into the same thing and figured out what's causing it. Turns out, if a zip file has a zip comment attached, it will be shown, along with a prompt that hangs your script.\nPassing -q to unzip will avoid showing the comment and any hangs, though you will lose the list of files being unzipped too. I haven't figured out how to just prevent the comment from showing up and not the rest of the stuff unzip prints.","Q_Score":1,"Tags":"python,unzip","A_Id":52304543,"CreationDate":"2017-06-11T01:25:00.000","Title":"Unzip prompted \"Press 'Q' to quit, or any other key to continue\"","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":1,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Tried to \nconda install -c conda-forge requests-futures=0.9.7\nbut failed with\nconda is not recognized as an internal or external command,\nC:\\Users\\user_name\\Anaconda3\\Scripts has been set for Path in environment variables under both user and System variables.\nI installed Python 3.5 as well and it is on Path, I am using Win10 X64.\nHow to fix the issue?","AnswerCount":5,"Available Count":2,"Score":0.0798297691,"is_accepted":false,"ViewCount":39426,"Q_Id":44488349,"Users Score":2,"Answer":"I had a similar problem when using cmd.\nFrom your Command prompt 'C:\\Users\\zkdur\\anaconda3\\Scripts\nNow try\nconda init --help\nconda init --verbose  after that restart your command prompt and conda will be working.","Q_Score":9,"Tags":"python,python-3.x,anaconda,conda","A_Id":68669748,"CreationDate":"2017-06-11T20:16:00.000","Title":"Windows 10 conda is not recognized as an internal or external command","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Tried to \nconda install -c conda-forge requests-futures=0.9.7\nbut failed with\nconda is not recognized as an internal or external command,\nC:\\Users\\user_name\\Anaconda3\\Scripts has been set for Path in environment variables under both user and System variables.\nI installed Python 3.5 as well and it is on Path, I am using Win10 X64.\nHow to fix the issue?","AnswerCount":5,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":39426,"Q_Id":44488349,"Users Score":0,"Answer":"After installing Anaconda on windows 10, you can use Anaconda prompt from start menu to activate a conda enabled terminal window.","Q_Score":9,"Tags":"python,python-3.x,anaconda,conda","A_Id":69712123,"CreationDate":"2017-06-11T20:16:00.000","Title":"Windows 10 conda is not recognized as an internal or external command","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Whenever I use python manage.py runserver on Windows PowerShell it causes Python to crash: \"Python has stopped working\" window pops up. Any idea why?\nI've tried rebooting, which causes a different type of error:\n\npython.exe: can't open file '.\\maanage.py': [Errno 2] No such file or directory.\n\nI created another project and tried runserver and again it caused the first error. All installation commands ran smoothly, but why am I facing this error?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":39,"Q_Id":44508145,"Users Score":0,"Answer":"Make sure you're spelling the file name correctly. \nmaanage.py != manage.py","Q_Score":0,"Tags":"python,django","A_Id":44508252,"CreationDate":"2017-06-12T20:25:00.000","Title":"Python localhost server","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm using python Tornado to perform asynchronous requests to crawl certain websites and one of the things I want to know is if a URL results in a redirect or what it's inital status code is (301, 302, 200, etc.). However, right now I can't figure out a way to find that information out with a Tornado response. I know a requests response object has a history attribute which records the redirect history, is there something similar for Tornado?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":65,"Q_Id":44508737,"Users Score":0,"Answer":"Tornado's HTTP clients do not currently provide this information. Instead, you can pass follow_redirects=False and handle and record redirects yourself.","Q_Score":0,"Tags":"python,tornado","A_Id":44511338,"CreationDate":"2017-06-12T21:08:00.000","Title":"Is there a way to get the redirect history from a Tornado response?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"How can I read files within a python module while executing in docker? I have a python module which I import in my code. normally in order to fetch the relative path of the module one can do <<module_name>>.__path__. however this approach does not work in docker but works locally.\nIs there a  common way in which I can read the files from the module in docker as well as in local?","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":789,"Q_Id":44510246,"Users Score":1,"Answer":"There are a few things to consider:\n\nWhere is python installed in the container and what version? Does\nthat match your dev environment? \nLook at your dockerfile - what is your working directory? Did you set one? Perhaps, you are running your python code from one directory, but trying to import a module from another. \nIs your PYTHONPATH set in your container? \nHave you installed the modules in the container that you're attempting to use? Perhaps with a requirements.txt file or manually? If so, are you executing your python code with the same python version\/path that you installed the modules with? \nAre you using a virtual environment? Has it been sourced?\nWhat user is your container running as? Does it have access to the python modules? You may need to chown the site-packages path or run as a different user or root.","Q_Score":0,"Tags":"python,docker,dockerfile,docker-swarm","A_Id":44510805,"CreationDate":"2017-06-12T23:38:00.000","Title":"how to read files from a python module inside docker","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a python application that's run inside a virtualenv on CentOS. This application needs a python library that's distributed and installed as an rpm. When the application runs I just get \nno module named .... \nI've verified that the rpm is installed correctly, and I've also installed the rpm in the site-packages directory of the virtualenv but that didn't help. What is the correct way to install an rpm so that an application running in a virtual environment has access to it?","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":599,"Q_Id":44513019,"Users Score":3,"Answer":"By default virtual environments don't access modules in site-packages. You either need to allow such access (toggleglobalsitepackages in virtualenvwrapper) or recreate you virtualenv allowing such access with option --system-site-packages.","Q_Score":0,"Tags":"python,centos,virtualenv,rpm","A_Id":44519576,"CreationDate":"2017-06-13T05:29:00.000","Title":"Application can't find python library installed as rpm","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"So I tried to download pip inside a docker container by first copying the installation file via\n\ndocker cp get-pip.py dock:get-pip.py\n\nand then I went into the container\n\ndocker exec -it 58 bash \n\nI then tried to python get-pip.py the file and i get the following error.\n\nRetrying (Retry(total=4, connect=None, read=None, redirect=None)) after connection broken by 'NewConnectionError(': Failed to establish a new connection: [Errno -3] Temporary failure in name resolution',)': \/simple\/pip\/","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":1840,"Q_Id":44530305,"Users Score":1,"Answer":"The problem was that the docker process had problems connecting to the internet. So the installation of pip manually had errors.\nSolution Process:\n\nRestart the docker process. (Not working) \nRestart the computer. (problem solved)","Q_Score":1,"Tags":"python,docker,pip,containers","A_Id":44545311,"CreationDate":"2017-06-13T19:49:00.000","Title":"Error Installing pip Inside Docker Container","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm a complete noob in Python, so please forgive this question if it's completely stupid. I had Canopy 1.4.7 installed on my system, working with Python 2.7. I just upgraded to Canopy 2.1.2, with Python 3.5.\nI'd been using Rodeo 2.5.2 as my environment. It worked like a charm with 1.4.7, but since the upgrade, I haven't been able to get it to work. All I get is a message saying \"Unable to execute.\" The Rodeo terminal then has to be restarted.\nAs a matter of fact, any code input doesn't work. I tried to put code into the Rodeo terminal; it doesn't even register the input. I can't press \"Enter,\" nothing happens. I tried to install a package; nothing happened. I've tried reinstalling both Canopy and Rodeo, but to no effect. I've also tried turning it off and on again (thanks, Roy). Mind you, I tried the same codes in the Canopy environment, and they worked fine. So I'm assuming it's an issue in Rodeo.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":942,"Q_Id":44532112,"Users Score":0,"Answer":"I got this error attempting to run a source file having more than 500 lines (code, comments and empty lines) in Rodeo 2.5.2. I am not sure what is the actual maximum (?) number of lines allowed (if any) but removing some comments and thus reducing the total number of lines to 514 allowed to run that file.","Q_Score":4,"Tags":"python,python-2.7,python-3.x,rodeo","A_Id":50547525,"CreationDate":"2017-06-13T21:46:00.000","Title":"\"Unable to execute\" message in Rodeo with Python 3.5","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have an standard appengine app currently running. I am currently developing another flask app which will use flexible runtime. I am wondering is it possible for me to have both apps in same project?","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":460,"Q_Id":44539192,"Users Score":0,"Answer":"There is an even easier way to do this that doesn't require creating a separate service :)\nSince you are only developing your second application, you do not need to set it as the default version to serve traffic to the public.  You only need to access it yourself, (or perhaps whoever you give the URL to).  The only drawback really is that you will not be able to access your project at the default url, usually .appspot.com\nTherefore, you can simply deploy your flexible app engine project, but make sure you don't give it any traffic sharing or promote it to the main version!!  You can then access your version simply by clicking on the version in the google cloud console, or by visiting http:\/\/-dot-.appspot.com\/ (It was not possible to access individual versions like this for flexible for quite some time, but this has now been resolved.)","Q_Score":0,"Tags":"google-app-engine,google-cloud-platform,google-app-engine-python,app-engine-flexible","A_Id":44711051,"CreationDate":"2017-06-14T08:15:00.000","Title":"Is it possible to have both appengine fleixble and standard in single project","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"Which time measurement is used for the timeout by the Python 3 subprocess module on UNIX\/Linux OSes?\nUNIX like OSes report 3 different times for process execution: real, user, and system. Even with processes that will be alive for only a few milliseconds the real time is often several hundred percent longer than the user and system time.\nI'm making calls using subprocess.call() and subprocess.check_output() with the timeout set to a quarter of a second for processes that the time utility reports taking 2-18 milliseconds for the various times reported. There is no problem and my enquiry is purely out of interest.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":56,"Q_Id":44550304,"Users Score":1,"Answer":"This is wall-clock time (real), not time spent in either userland (user) or the kernel (system).\nYou can test this yourself by running a process such as sleep 60, which uses almost no user or system time at all, and observing that it still times out.","Q_Score":0,"Tags":"python-3.x,subprocess","A_Id":44550449,"CreationDate":"2017-06-14T16:39:00.000","Title":"Which 'time' is used for the timeout by the subprocess module on UNIX\/Linux OSes?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a self-installed python in my user directory in a corporate UNIX SUSE computer (no sudo privilege):\nwhich python\n<user>\/bin\/python\/Python-3.6.1\/python\nI have an executable (chmod 777) sample.py file with this line at the top of the file:\n#!<user>\/bin\/python\/Python-3.6.1\/python\nI can execute the file like this:\npython sample.py\nBut when I run it by itself I get an error:\n\/full\/path\/sample.py\n \/full\/path\/sample.py: Command not found\nI have no idea why it's not working. I'm discombobulated as what might be going wrong since the file is executable, the python path is correct, and the file executes if I put a python command in the front. What am I missing?\nEDIT:\nI tried putting this on top of the file:\n#!\/usr\/bin\/env python\nNow, I get this error:\n: No such file or directory\nI tried this to make sure my env is correct\nwhich env\n \/usr\/bin\/env\nEDIT2:\nYes, I can run the script fine using the shebang command like this:\n<user>\/bin\/python\/Python-3.6.1\/python \/full\/path\/sample.py","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":1040,"Q_Id":44555995,"Users Score":2,"Answer":"Your file has DOS line endings (CR+LF). It works if you run python sample.py but doesn't work if you run .\/sample.py. Recode the file so it has Unix line endings (pure LF at the end of every line).","Q_Score":1,"Tags":"python,linux,unix","A_Id":44556361,"CreationDate":"2017-06-14T22:59:00.000","Title":"Executable .py file with shebang path to which python gives error, command not found","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I created a .exe file using Py2exe on Windows 10 but when I try to run it on a Windows 7 computer it says that the os version is wrong. \nCan anyone tell me how to fix this? (like using another Python or Py2exe version or setting a specific configuration inside setup.py)","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":850,"Q_Id":44577583,"Users Score":0,"Answer":"I solved the problem myself and I'm going to share the answer if someone ever has the same mistake. I just had to download a 32-bit version of Canopy (with Python 2.7) and py2exe in order for them to work on Windows 7.","Q_Score":5,"Tags":"python,windows,py2exe","A_Id":44632191,"CreationDate":"2017-06-15T21:49:00.000","Title":"Py2exe - Can't run a .exe created on Windows 10 with a Windows 7 computer","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am using a CentOS 7.2 and trying to provision a VM in azure through Ansible using the module \"azure_rm_virtualmachine\"  and getting the error as \"No module named packaging.version\" Below is my error \nTraceback (most recent call last):\n  File \"\/tmp\/ansible_7aeFMQ\/ansible_module_azure_rm_virtualmachine.py\", line 445, in \n    from ansible.module_utils.azure_rm_common import *\n  File \"\/tmp\/ansible_7aeFMQ\/ansible_modlib.zip\/ansible\/module_utils\/azure_rm_common.py\", line 29, in \nImportError: No module named packaging.version\nfatal: [localhost]: FAILED! => {\n    \"changed\": false,\n    \"failed\": true,\n    \"module_stderr\": \"Traceback (most recent call last):\\n  File \\\"\/tmp\/ansible_7aeFMQ\/ansible_module_azure_rm_virtualmachine.py\\\", line 445, in \\n    from ansible.module_utils.azure_rm_common import *\\n  File \\\"\/tmp\/ansible_7aeFMQ\/ansible_modlib.zip\/ansible\/module_utils\/azure_rm_common.py\\\", line 29, in \\nImportError: No module named packaging.version\\n\",\n    \"module_stdout\": \"\",\n    \"msg\": \"MODULE FAILURE\",\n    \"rc\": 0\n}\nBelow is my playbook and I am using a ansible version 2.3.0.0 and python version of 2.7.5 and pip 9.0.1 \n\nname: Provision new VM in azure\nhosts: localhost\nconnection: local\ntasks:\n\nname: Create VM\nazure_rm_virtualmachine:\nresource_group: xyz\nname: ScriptVM\nvm_size: Standard_D1\nadmin_username: xxxx\nadmin_password: xxxx\nimage:\noffer: CentOS\npublisher: Rogue Wave Software\nsku: '7.2'\nversion: latest\n\n\nI am running the playbook from the ansible host and I tried to create a resource group through ansible but I get the same error as \"No module named packaging.version\" .","AnswerCount":2,"Available Count":2,"Score":1.0,"is_accepted":false,"ViewCount":4088,"Q_Id":44583740,"Users Score":6,"Answer":"The above error is occurred due to your environment doesn't have packaging module.\nTo solve this issue by installing packaging module.\npip install packaging\nThe above command will install packaging module of 16.8 version","Q_Score":4,"Tags":"python-2.7,azure,ansible","A_Id":45960185,"CreationDate":"2017-06-16T07:49:00.000","Title":"No module named packaging.version for Ansible VM provisioning in Azure","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am using a CentOS 7.2 and trying to provision a VM in azure through Ansible using the module \"azure_rm_virtualmachine\"  and getting the error as \"No module named packaging.version\" Below is my error \nTraceback (most recent call last):\n  File \"\/tmp\/ansible_7aeFMQ\/ansible_module_azure_rm_virtualmachine.py\", line 445, in \n    from ansible.module_utils.azure_rm_common import *\n  File \"\/tmp\/ansible_7aeFMQ\/ansible_modlib.zip\/ansible\/module_utils\/azure_rm_common.py\", line 29, in \nImportError: No module named packaging.version\nfatal: [localhost]: FAILED! => {\n    \"changed\": false,\n    \"failed\": true,\n    \"module_stderr\": \"Traceback (most recent call last):\\n  File \\\"\/tmp\/ansible_7aeFMQ\/ansible_module_azure_rm_virtualmachine.py\\\", line 445, in \\n    from ansible.module_utils.azure_rm_common import *\\n  File \\\"\/tmp\/ansible_7aeFMQ\/ansible_modlib.zip\/ansible\/module_utils\/azure_rm_common.py\\\", line 29, in \\nImportError: No module named packaging.version\\n\",\n    \"module_stdout\": \"\",\n    \"msg\": \"MODULE FAILURE\",\n    \"rc\": 0\n}\nBelow is my playbook and I am using a ansible version 2.3.0.0 and python version of 2.7.5 and pip 9.0.1 \n\nname: Provision new VM in azure\nhosts: localhost\nconnection: local\ntasks:\n\nname: Create VM\nazure_rm_virtualmachine:\nresource_group: xyz\nname: ScriptVM\nvm_size: Standard_D1\nadmin_username: xxxx\nadmin_password: xxxx\nimage:\noffer: CentOS\npublisher: Rogue Wave Software\nsku: '7.2'\nversion: latest\n\n\nI am running the playbook from the ansible host and I tried to create a resource group through ansible but I get the same error as \"No module named packaging.version\" .","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":4088,"Q_Id":44583740,"Users Score":0,"Answer":"You may try this, it solved for me\n\nsudo pip install -U pip setuptools\n\nFYI: My ENVs are \n\nUbuntu 16.04.2 LTS on Windows Subsystem for Linux (Windows 10 bash)\nPython 2.7.12\npip 9.0.1\nansible 2.3.1.0\nazure-cli (2.0.12)","Q_Score":4,"Tags":"python-2.7,azure,ansible","A_Id":45527155,"CreationDate":"2017-06-16T07:49:00.000","Title":"No module named packaging.version for Ansible VM provisioning in Azure","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"windows power shell or cmd uses anaconda python instead of the default windows installation\nhow to make them use the default python installation?\nmy os is win 8.1\npython 3.6\nanaconda python 3.6","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":1228,"Q_Id":44586049,"Users Score":0,"Answer":"Set the environment path variable of your default python interpreter in system properties.\nor if this doesn't work do:\nin cmd  C:\\Python27\\python.exe yourfilename.py\nin the command first part is your interpreter location and second is your file name","Q_Score":2,"Tags":"python,anaconda,default","A_Id":44586285,"CreationDate":"2017-06-16T09:43:00.000","Title":"How to change cmd python from anaconda to default python?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm on Docker for past weeks and I can say I love it and I get the idea. But what I can't figure out is how can I \"transfer\" my current set-up on Docker solution. I guess I'm not the only one and here is what I mean.\nI'm Python guys, more specifically Django. So I usually have this:\n\nDebian installation\nMy app on the server (from git repo).\nVirtualenv with all the app dependencies\nSupervisor that handles Gunicorn that runs my Django app.\n\nThe thing is when I want to upgrade and\/or restart the app (I use fabric for these tasks) I connect to the server, navigate to the app folder, run git pull, restart the supervisor task that handles Gunicorn which reloads my app. Boom, done.\nBut what is the right (better, more Docker-ish) approach to modify this setup when I use Docker? Should I connect to docker image bash somehow everytime I want upgrade the app and run the upgrade or (from what I saw) should I like expose the app into folder out-of docker image and run the standard upgrade process?\nHope you get the confusion of old school dude. I bet Docker guys were thinking about that.\nCheers!","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":284,"Q_Id":44591775,"Users Score":3,"Answer":"For development, docker users will typically mount a folder from their build directory into the container at the same location the Dockerfile would otherwise COPY it. This allows for rapid development where at most you need to bounce the container rather than rebuild the image.\nFor production, you want to include everything in the image and not change it, only persistent data goes in the volumes, your code is in the image. When you make a change to the code, you build a new image and replace the running container in production.\nLogging into the container and manually updating things is something I only do to test while developing the Dockerfile, not to manage a developing application.","Q_Score":1,"Tags":"python,django,git,docker","A_Id":44591974,"CreationDate":"2017-06-16T14:27:00.000","Title":"Docker vs old approach (supervisor, git, your project)","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I read that message queue is preferred over subprocess.Popen(). It is said that message queue is scalable solution. I want to understand how is it so.\nI just want to list the benefits of message queue over subeprocess.Popen() so that I can convince my superiors to use message queue instead of subprocess","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":1304,"Q_Id":44592972,"Users Score":4,"Answer":"These are completely separate and different things.\nsubprocess.Popen() simply spawns (by calling fork and exec) new OS process for a specific command you passed to it. So it's perfect for cases when you need something to execute in separate process and (optionally) get result of execution (in somewhat awkward way, via pipe).\nQueues (like Celery or ActiveJob) gives you two main things:\n\nStorage (more precisely, an interface to some existing storage, like PostgreSQL or MongoDB) for your tasks (or messages), that are going to be serialized automatically before going to that storage.\nWorkers that polling this storage and actually perform those tasks (deserializing them before performing, also automatically).\n\nSo, it's possible to have a lot of workers, even maybe in distributed environment. It gives you not only a vertical scalability but a horizontal one (by keeping your workers on separate machines).\nOn the other hand, queues are more suited for asynchronous processing (i.e. for jobs that need to be executed later and you don't need results right now) and are more heavyweight than simple process spawning.\nSo, if you have simple one-off jobs just to be executed somewhere outside your main process - use processes.\nIf you have a bunch of different jobs that are needed to be executed asynchronously and you want to have an ability to scale that process, you should use queues, they'll make life easier.","Q_Score":1,"Tags":"python,django,celery,django-celery","A_Id":44593395,"CreationDate":"2017-06-16T15:29:00.000","Title":"python subprocess.Popen() vs message queue (celery)","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I would like to get the unix file type of a file specified by path (find out whether it is a regular file, a named pipe, a block device, ...)\nI found in the docs os.stat(path).st_type but in Python 3.6, this seems not to work.\nAnother approach is to use os.DirEntry objects (e. g. by os.listdir(path)), but there are only methods is_dir(), is_file() and is_symlink().\nAny ideas how to do it?","AnswerCount":3,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":1711,"Q_Id":44595736,"Users Score":1,"Answer":"Python 3.6 has pathlib and its Path objects have methods:\n\nis_dir()\nis_file()\nis_symlink()\nis_socket()\nis_fifo()\nis_block_device()\nis_char_device()\n\npathlib takes a bit to get used to (at least for me having come to Python from C\/C++ on Unix), but it is a nice library","Q_Score":6,"Tags":"python,unix,operating-system","A_Id":44595853,"CreationDate":"2017-06-16T18:24:00.000","Title":"Get unix file type with Python os module","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I downloaded Python 3.6 from Python's website (from the download page for Windows) and it seems only the interpreter is available. I don't see anything else (Standard Library or something) in my system. Is it included in the interpreter and hidden or something?\nI tried to install ibm_db 2.0.7 as an extension of Python DB API, but the installation instructions seem too old. The paths defined don't exist in my Win10.\nBy the way, I installed the latest Platform SDK as instructed (which is the predecessor of Windows 10 SDK, so I had to to install Windows 10 SDK instead). I also installed .NET SDK V1.1, which is told to include Visual C++ 2003 (Visual C++ 2003 is not available today on its own). I considered to install VS2017, but because it was too big  (12.some GB) I passed on that option.\nI am stuck and can't proceed for I don't know which changes happened from the point the installation instructions have been written and what else I need to do. How can I install python with the ibm_db package on Windows 10?","AnswerCount":4,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":4969,"Q_Id":44610150,"Users Score":0,"Answer":"ibm_db does not support Python 3.6 you need to downgrade to Python 3.5.4. That is how i did it.","Q_Score":1,"Tags":"python,windows,db2","A_Id":47904208,"CreationDate":"2017-06-17T22:54:00.000","Title":"How to install Python libraries\/packages and ibm_db 2.0.7 installation instructions?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I downloaded Python 3.6 from Python's website (from the download page for Windows) and it seems only the interpreter is available. I don't see anything else (Standard Library or something) in my system. Is it included in the interpreter and hidden or something?\nI tried to install ibm_db 2.0.7 as an extension of Python DB API, but the installation instructions seem too old. The paths defined don't exist in my Win10.\nBy the way, I installed the latest Platform SDK as instructed (which is the predecessor of Windows 10 SDK, so I had to to install Windows 10 SDK instead). I also installed .NET SDK V1.1, which is told to include Visual C++ 2003 (Visual C++ 2003 is not available today on its own). I considered to install VS2017, but because it was too big  (12.some GB) I passed on that option.\nI am stuck and can't proceed for I don't know which changes happened from the point the installation instructions have been written and what else I need to do. How can I install python with the ibm_db package on Windows 10?","AnswerCount":4,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":4969,"Q_Id":44610150,"Users Score":0,"Answer":"for python libraries you can always use pip, which is a python package installer.\nif you are using python 3.6 then you already have pip. just make sure you're using pip from the main command line not the python terminal","Q_Score":1,"Tags":"python,windows,db2","A_Id":44611663,"CreationDate":"2017-06-17T22:54:00.000","Title":"How to install Python libraries\/packages and ibm_db 2.0.7 installation instructions?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have looked for Python 2.7.12 in my apps and docs but I can't find it... \nI'm using a macbook pro.\nI can see Python 3.6 in my applications so I don't know why the terminal isn't referring to this one.  \nI want to get started learning django but I don't think it will be possible if I don't use Python 3.5 or later.  \nis there a way to tell the terminal to use 3.6 instead?","AnswerCount":4,"Available Count":4,"Score":0.0,"is_accepted":false,"ViewCount":2694,"Q_Id":44615007,"Users Score":0,"Answer":". ~\/.bashrc\nalias python='\/usr\/bin\/python3.4'","Q_Score":0,"Tags":"python,django,macos,terminal,installation","A_Id":44615048,"CreationDate":"2017-06-18T12:33:00.000","Title":"Downloaded Python 3.6 but terminal is still saying I'm using python 2.7.12","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":1},{"Question":"I have looked for Python 2.7.12 in my apps and docs but I can't find it... \nI'm using a macbook pro.\nI can see Python 3.6 in my applications so I don't know why the terminal isn't referring to this one.  \nI want to get started learning django but I don't think it will be possible if I don't use Python 3.5 or later.  \nis there a way to tell the terminal to use 3.6 instead?","AnswerCount":4,"Available Count":4,"Score":0.049958375,"is_accepted":false,"ViewCount":2694,"Q_Id":44615007,"Users Score":1,"Answer":"Open the text editor like nano , vim or gedit and open the .bashrc file ,\nnano ~\/.bashrc\nand create the bash alias,\nTo do so add the following line into the .bashrc file:\nalias python='\/usr\/bin\/python3.6'\nSave the file and re-open the terminal.\nEdit:\nSimilarly, if you don't want to create the direct alias.\nAs @exprator suggested above you can also use python command for python 2 and python3 to use Python 3 version","Q_Score":0,"Tags":"python,django,macos,terminal,installation","A_Id":44615199,"CreationDate":"2017-06-18T12:33:00.000","Title":"Downloaded Python 3.6 but terminal is still saying I'm using python 2.7.12","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":1},{"Question":"I have looked for Python 2.7.12 in my apps and docs but I can't find it... \nI'm using a macbook pro.\nI can see Python 3.6 in my applications so I don't know why the terminal isn't referring to this one.  \nI want to get started learning django but I don't think it will be possible if I don't use Python 3.5 or later.  \nis there a way to tell the terminal to use 3.6 instead?","AnswerCount":4,"Available Count":4,"Score":0.0,"is_accepted":false,"ViewCount":2694,"Q_Id":44615007,"Users Score":0,"Answer":"By the way, you shouldn't use the default environment to develop. Instead, you have to use Virtualenv","Q_Score":0,"Tags":"python,django,macos,terminal,installation","A_Id":44618123,"CreationDate":"2017-06-18T12:33:00.000","Title":"Downloaded Python 3.6 but terminal is still saying I'm using python 2.7.12","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":1},{"Question":"I have looked for Python 2.7.12 in my apps and docs but I can't find it... \nI'm using a macbook pro.\nI can see Python 3.6 in my applications so I don't know why the terminal isn't referring to this one.  \nI want to get started learning django but I don't think it will be possible if I don't use Python 3.5 or later.  \nis there a way to tell the terminal to use 3.6 instead?","AnswerCount":4,"Available Count":4,"Score":0.049958375,"is_accepted":false,"ViewCount":2694,"Q_Id":44615007,"Users Score":1,"Answer":"Just use python in terminal for python 2.7 and type python3 to use python 3.6 when you need","Q_Score":0,"Tags":"python,django,macos,terminal,installation","A_Id":44615243,"CreationDate":"2017-06-18T12:33:00.000","Title":"Downloaded Python 3.6 but terminal is still saying I'm using python 2.7.12","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":1},{"Question":"So I have written a script that scrapes betting data from an odds aggregating site and outputs everything into a CSV. My script works perfectly, however, I can only run it from within Spyder. Whenever I double click the PY file a terminal opens up and closes quickly. After messing around with it for a while I also discovered that I can run it through the command line. \nI have the program\/script line pointing to my python3:\nC:\\Users\\path\\AppData\\Local\\Continuum\\Anaconda3\\python.exe\nAnd my argument line points to the script\n\\networkname\\path\\moneylineScraper.py\nBest case scenario I would like to be able to run this script through task scheduler, but I also cannot even run it when I double click the Py file. Any help would be appreciated!","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":203,"Q_Id":44631802,"Users Score":0,"Answer":"An alternative is, to create a bat file and then execute it.\nA new bat file:\n-- change directory to that of python script file.\n-- using full path execute python with script file as argument.\n-- End the batch file.\nMake that bat file executable with sufficient previlages and execute that.","Q_Score":3,"Tags":"python,python-2.7,python-3.x,csv,scheduled-tasks","A_Id":45740149,"CreationDate":"2017-06-19T13:23:00.000","Title":"Able to run Python3 Script through IDE, Command Line, but not by double clicking or Task Scheduler","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm using google cloudSQL for applying advance search on people data to fetch the list of users. In datastore, there are data already stored there with 2 model. First is used to track current data of users and other model is used to track historical timeline. The current data is stored on google cloudSQL are more than millions rows for all users. Now I want to implement advance search on historical data including between dates by adding all history data to cloud.  \nIf anyone can suggest the better structure for this historical model as I've gone through many of the links and articles. But cannot find proper solution as I have to take care of the performance for search (In Current search, the time is taken to fetch result is normal but when history is fetched, It'll scan all the records which causes slowdown of queries because of complex JOINs as needed). The query that is used to fetch the data from cloudSQL are made dynamically based on the users' need. For example, A user want the employees list whose manager is \"xyz.123@abc.in\" , by using python code, the query will built accordingly. Now a user want to find users whose manager WAS \"xyz.123@abc.in\" with effectiveFrom 2016-05-02 to 2017-01-01.\nAs I've find some of the usecases for structure as below:\n1) Same model as current structure with new column flag for isCurrentData (status of data whether it is history or active)\nDisadv.:\n - queries slowdown while fetching data as it will scan all records.\n   Duplication of data might increase.\nThese all disadv. will affect the performance of advance search by increasing time.\n    Solution to this problem is to partition whole table into diff tables.\n2) Partition based on year.\n   As time passes, this will generate too many tables.\n3) 2 tables might be maintained.\n   1st for current data and second one for history. But when user want to search data on both models will create complexity of build query.\nSo, need suggestions for structuring historical timeline with improved performance and effective data handling.\nThanks in advance.","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":81,"Q_Id":44654127,"Users Score":0,"Answer":"@Kevin Malachowski : Thanks for guiding me with your info and questions as It gave me new way of thinking. \nHistorical data records will be more than 0.3-0.5 million(maximum). Now I'll use BigQuery for historical advance search.\nFor live data-cloudSQL will be used as we must focus on perfomance for fetched data.\nSome of performance issue will be there for historical search, when a user wants both results from live as well as historical data. (BigQuery is taking time near about 5-6 sec[or more] for worst case) But it will be optimized as per data and structure of the model.","Q_Score":1,"Tags":"python,google-app-engine,google-cloud-sql","A_Id":44715500,"CreationDate":"2017-06-20T13:14:00.000","Title":"Google CloudSQL : structuring history data on cloudSQL","Data Science and Machine Learning":0,"Database and SQL":1,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I'm using google cloudSQL for applying advance search on people data to fetch the list of users. In datastore, there are data already stored there with 2 model. First is used to track current data of users and other model is used to track historical timeline. The current data is stored on google cloudSQL are more than millions rows for all users. Now I want to implement advance search on historical data including between dates by adding all history data to cloud.  \nIf anyone can suggest the better structure for this historical model as I've gone through many of the links and articles. But cannot find proper solution as I have to take care of the performance for search (In Current search, the time is taken to fetch result is normal but when history is fetched, It'll scan all the records which causes slowdown of queries because of complex JOINs as needed). The query that is used to fetch the data from cloudSQL are made dynamically based on the users' need. For example, A user want the employees list whose manager is \"xyz.123@abc.in\" , by using python code, the query will built accordingly. Now a user want to find users whose manager WAS \"xyz.123@abc.in\" with effectiveFrom 2016-05-02 to 2017-01-01.\nAs I've find some of the usecases for structure as below:\n1) Same model as current structure with new column flag for isCurrentData (status of data whether it is history or active)\nDisadv.:\n - queries slowdown while fetching data as it will scan all records.\n   Duplication of data might increase.\nThese all disadv. will affect the performance of advance search by increasing time.\n    Solution to this problem is to partition whole table into diff tables.\n2) Partition based on year.\n   As time passes, this will generate too many tables.\n3) 2 tables might be maintained.\n   1st for current data and second one for history. But when user want to search data on both models will create complexity of build query.\nSo, need suggestions for structuring historical timeline with improved performance and effective data handling.\nThanks in advance.","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":81,"Q_Id":44654127,"Users Score":0,"Answer":"Depending on how often you want to do live queries vs historical queries and the size of your data set, you might want to consider placing the historical data elsewhere.\nFor example, if you need quick queries for live data and do many of them, but can handle higher-latency queries and only execute them sometimes, you might consider periodically exporting data to Google BigQuery. BigQuery can be useful for searching a large corpus of data but has much higher latency and doesn't have a wire protocol that is MySQL-compatible (although it's query language will look familiar to those who know any flavor of SQL). In addition, while for Cloud SQL you pay for data storage and the amount of time your database is running, in BigQuery you mostly pay for data storage and the amount of data scanned during your query executions. Therefore, if you plan on executing many of these historical queries it may get a little expensive.\nAlso, if you don't have a very large data set, BigQuery may be a bit of an overkill. How large is your \"live\" data set and how large do you expect your \"historical\" data set to grow over time? Is it possible to just increase the size of the Cloud SQL instance as the historical data grows until the point at which it makes sense to start exporting to Big Query?","Q_Score":1,"Tags":"python,google-app-engine,google-cloud-sql","A_Id":44662852,"CreationDate":"2017-06-20T13:14:00.000","Title":"Google CloudSQL : structuring history data on cloudSQL","Data Science and Machine Learning":0,"Database and SQL":1,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"Is there a way to install the python documentation that would make it available as if it was a manpage? (I know you can download the sourcefiles for the documentation and read them in vim, using less or whatever  but I was thinking about something a bit less manual. Don't want to roll my own.)","AnswerCount":7,"Available Count":2,"Score":1.0,"is_accepted":false,"ViewCount":17218,"Q_Id":44697036,"Users Score":10,"Answer":"On Debian (and derived distributions, like Ubuntu) install pydoc package. Then you can use pydoc whatever command.","Q_Score":12,"Tags":"python,python-3.x,python-2.7","A_Id":44697197,"CreationDate":"2017-06-22T10:39:00.000","Title":"Reading python documentation in the terminal?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Is there a way to install the python documentation that would make it available as if it was a manpage? (I know you can download the sourcefiles for the documentation and read them in vim, using less or whatever  but I was thinking about something a bit less manual. Don't want to roll my own.)","AnswerCount":7,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":17218,"Q_Id":44697036,"Users Score":0,"Answer":"I will answer since I don't satisfied with the accepted answer. Probably because I don't use IDLE.\nNote that, I use Ubuntu (terminal).\nProbably in other OSs, it works the same.\nIs there a way to install that? No need.\nI found that it comes by default.\nHow to access that?\nUse help() command in python' shell.\n\nIn the shell, type command help().\nNow that you're in the help utility, enter anything that you want to read its documentation. Press q to quit the documentation and type quit to quit the help utility.","Q_Score":12,"Tags":"python,python-3.x,python-2.7","A_Id":72360631,"CreationDate":"2017-06-22T10:39:00.000","Title":"Reading python documentation in the terminal?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I edited my dispatch.yaml and deployed on app engine using\n appcfg.py update_dispatch .\nBut when I go and see source code under StackDriver debug, I don't see the change.\nWhy the changes doesn't get reflected. But when I deploy complete app by appcfg.py update . the changes get reflected.\nBut in case, If I only want to update dispatch how do I do???","AnswerCount":2,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":306,"Q_Id":44698229,"Users Score":1,"Answer":"Try\n\ngcloud app deploy dispatch.yaml\n\n...to connect services to dispatch rules.","Q_Score":0,"Tags":"python,google-app-engine","A_Id":62299368,"CreationDate":"2017-06-22T11:33:00.000","Title":"dispatch.yaml not getting updated","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I'm working on a flask API, which one of the endpoint is to receive a message and publish it to PubSub. Currently, in order to test that endpoint, I will have to manually spin-up a PubSub emulator from the command line, and keep it running during the test. It working just fine, but it wouldn't be ideal for automated test. \nI wonder if anyone knows a way to spin-up a test PubSub emulator from python? Or if anyone has a better solution for testing such an API?","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":768,"Q_Id":44708430,"Users Score":0,"Answer":"This is how I usually do:\n1. I create a python client class which does publish and subscribe with the topic, project and subscription used in emulator.\nNote: You need to set PUBSUB_EMULATOR_HOST=localhost:8085 as env in your python project.\n2. I spin up a pubsub-emulator as a docker container.\nNote: You need to set some envs, mount volumes and expose port 8085.\nset following envs for container:\n\nPUBSUB_EMULATOR_HOST\nPUBSUB_PROJECT_ID\nPUBSUB_TOPIC_ID\nPUBSUB_SUBSCRIPTION_ID\n\n\nWrite whatever integration tests you want to. Use publisher or subscriber from client depending on your test requirements.","Q_Score":1,"Tags":"python,google-cloud-platform,google-cloud-pubsub","A_Id":64239668,"CreationDate":"2017-06-22T20:03:00.000","Title":"How to boot up a test pubsub emulator from python for automated testing","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I am trying to install pip for python in windows 7. I installed it and I added \"C:\\PythonXX\\Scripts\" to the windows path variables. But, when I typed \"pip\" in the command prompt it shows that pip is not recognized as an internal or external command.\nIs there any way to figure out this problem?","AnswerCount":2,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":6397,"Q_Id":44711255,"Users Score":0,"Answer":"if you have already installed python of whatever version you can skip ahead to step 4 or step 6.\n\ndownload and install python default installation is c:\\python27\nCreate a new System Variable named Variable name: PYTHON_HOME and Variable \nvalue: c:\\Python27 (or whatever your installation path was)\nFind the system variable called Path and click Edit\nAdd the following text to the end of the Variable value:;%PYTHON_HOME%\\;%PYTHON_HOME%\\Scripts\\\nVerify a successful environment variable update by opening a new command prompt window (important!) and typing python from any location\nDownload get-pip.py to a folder on your computer. Open a command prompt window and navigate to the folder containing get-pip.py. Then run python get-pip.py. This will install pip.\nverify your pip installation: open command prompt and type 'pip freeze' \nwithout quotation and if it shows like\nantiorm==1.1.1\nenum34==1.0\nrequests==2.3.0\nvirtualenv==1.11.6\nthen you are successful.\nif above steps failed than update environment variable.\ngo to Control Panel\\System and Security\\System\nselect advance system setting then select environment variable and add c:\\python27\\scripts to path variable then it will be fine.\ni have tested it successfully on my pc.","Q_Score":0,"Tags":"python,pip","A_Id":44713819,"CreationDate":"2017-06-23T00:26:00.000","Title":"Error found when installing pip on Windows","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to install pip for python in windows 7. I installed it and I added \"C:\\PythonXX\\Scripts\" to the windows path variables. But, when I typed \"pip\" in the command prompt it shows that pip is not recognized as an internal or external command.\nIs there any way to figure out this problem?","AnswerCount":2,"Available Count":2,"Score":-0.0996679946,"is_accepted":false,"ViewCount":6397,"Q_Id":44711255,"Users Score":-1,"Answer":"I know it's hustle to install pip in Windows. With latest Python you don't need to install pip, it's now prebuilt and you can access it by python -m pip","Q_Score":0,"Tags":"python,pip","A_Id":44713170,"CreationDate":"2017-06-23T00:26:00.000","Title":"Error found when installing pip on Windows","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to install mysqlclient, but I get this error message:\n\n_mysql.c:40:20: fatal error: Python.h: No such file or directory\n      compilation terminated.\n  error: command 'x86_64-linux-gnu-gcc' failed with exit status 1\n\nCould anyone help me to resolve this?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":1400,"Q_Id":44720075,"Users Score":3,"Answer":"You need to install the python development package (which contains the C headers files) for your OS (on debian-based distros it's named 'pythonX.X-dev' where 'X.X' is python version).","Q_Score":3,"Tags":"python","A_Id":44720171,"CreationDate":"2017-06-23T11:14:00.000","Title":"fatal error: Python.h: No such file or directory error: command 'x86_64-linux-gnu-gcc' failed with exit status 1","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"There are a lot of threads from Python users on Windows who lose the \"Edit with IDLE\" option on the context menu (right click on a .py file in the File Explorer). I do have the menu item, but most of the time it appears to do nothing. \nChecking the running applications and processes in Task Manager reveals nothing, except I think IDLE or its launcher or something runs very briefly, so quickly it usually never shows up in the Task Manager list. \nThanks to all who suggested splitting this into question and answer.\nMy solution (for now) will be posted next","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":152,"Q_Id":44733040,"Users Score":0,"Answer":"Eventually it became clear that it was launching IDLE, but IDLE was exiting as soon as it got to the point of waiting for user input. Windows CMD scripts do that sometimes when they aren't feeling conversational.\nI found the relevant script at F:\\Python35\\Lib\\idlelib\\Idle.bat. If you add a \"\/W\" switch to the command, it waits for input. Problem solved, at least so far. The entire Idle.bat file now reads as follows. The only change was inserting \"\/W\" in the main command line:\n@echo off\nrem Start IDLE using the appropriate Python interpreter\nset CURRDIR=%~dp0\nstart \"IDLE\" \"%CURRDIR%....\\pythonw.exe\" \/W \"%CURRDIR%idle.pyw\" %1 %2 %3 %4 %5 %6 %7 %8 %9","Q_Score":0,"Tags":"python,windows-7,contextmenu,python-idle","A_Id":44738281,"CreationDate":"2017-06-24T05:19:00.000","Title":"Python's \"EDIT with IDLE\" runs but exits immediately (Win7)","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I installed Python 3.6.1 on my Ubuntu 16 server and cannot find the install location. I have looked in \/usr\/bin and there are reference to all other versions except 3.6.1. Where can I find the executable for this version?","AnswerCount":2,"Available Count":2,"Score":0.2913126125,"is_accepted":false,"ViewCount":6396,"Q_Id":44734164,"Users Score":3,"Answer":"In your terminal, type : which python3","Q_Score":3,"Tags":"python-3.x,installation,ubuntu-16.04","A_Id":44744454,"CreationDate":"2017-06-24T07:46:00.000","Title":"Python 3.6.1 install location","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I installed Python 3.6.1 on my Ubuntu 16 server and cannot find the install location. I have looked in \/usr\/bin and there are reference to all other versions except 3.6.1. Where can I find the executable for this version?","AnswerCount":2,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":6396,"Q_Id":44734164,"Users Score":4,"Answer":"Use command \"whereis python3.6.1\"","Q_Score":3,"Tags":"python-3.x,installation,ubuntu-16.04","A_Id":44734300,"CreationDate":"2017-06-24T07:46:00.000","Title":"Python 3.6.1 install location","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I've seen a few posts on this topic with odd hard to reproduce behaviours. Here's a new set of data points.\n\nCurrently the following works\n\ncd .\/hosts\n.\/ec2.py --profile=dev\n\n\nAnd this fails\n\nAWS_PROFILE=dev; ansible-playbook test.yml\nThese were both working a couple days ago.  Something in my environment changed. Still investigating. Any guesses?\nError message:\nERROR! The file .\/hosts\/ec2.py is marked as executable, but failed to execute correctly. If this is not supposed to be an executable script, correct this withchmod -x .\/hosts\/ec2.py.\nERROR! Inventory script (.\/hosts\/ec2.py) had an execution error: ERROR: \"Error connecting to AWS backend.\nYou are not authorized to perform this operation.\", while: getting EC2 instances\nERROR! .\/hosts\/ec2.py:3: Error parsing host definition ''''': No closing quotation\n\nNote that the normal credentials error is:\nERROR: \"Error connecting to AWS backend.\nYou are not authorized to perform this operation.\", while: getting EC2 instances\n...\nHmmm. Error message has shifted. \n\nAWS_PROFILE=dev; ansible-playbook test.yml\nERROR! ERROR! .\/hosts\/tmp:2: Expected key=value host variable assignment, got: {","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":1445,"Q_Id":44737529,"Users Score":0,"Answer":"Looks like the problem was a temporary file in the hosts folder.  After removing it the problems went away.  It looks like std ansible behaviour: Pull in ALL files in the hosts folder.","Q_Score":0,"Tags":"python,amazon-ec2,ansible","A_Id":44737817,"CreationDate":"2017-06-24T14:36:00.000","Title":"Ansible ec2.py runs standalone but fails in playbook","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I'm trying to send date to azure documentdb and I have to send a huge document (100 000+ lines), however when I send it I get a Request size is too large error.\nI guess it should be possible to change this request size limit (which should be stored in a variable somewhere) but I can't find it, does someone know this ?\nThanks !\n(I'm using pydocumentdb by the way)","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":85,"Q_Id":44756937,"Users Score":0,"Answer":"DocumentDB allows only documents upto 2MB to be sent\/inserted. What's the size of your document and how complex\/nested it is?","Q_Score":0,"Tags":"python,azure-cosmosdb","A_Id":44772468,"CreationDate":"2017-06-26T09:46:00.000","Title":"How to change pydocumentdb request size limit?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"For reference. The absolute path is the full path to some place on your computer. The relative path is the path to some file with respect to your current working directory (PWD). For example:\nAbsolute path: \nC:\/users\/admin\/docs\/stuff.txt\nIf my PWD is C:\/users\/admin\/, then the relative path to stuff.txt would be: docs\/stuff.txt\nNote, PWD + relative path = absolute path.\nCool, awesome. Now, I wrote some scripts which check if a file exists.\nos.chdir(\"C:\/users\/admin\/docs\")\n os.path.exists(\"stuff.txt\")\nThis returns TRUE if stuff.txt exists and it works.\nNow, instead if I write,\nos.path.exists(\"C:\/users\/admin\/docs\/stuff.txt\")\nThis also returns TRUE. \nIs there a definite time when we need to use one over the other? Is there a methodology for how python looks for paths? Does it try one first then the other?\nThanks!","AnswerCount":2,"Available Count":1,"Score":1.0,"is_accepted":false,"ViewCount":29634,"Q_Id":44772007,"Users Score":6,"Answer":"The biggest consideration is probably portability. If you move your code to a different computer and you need to access some other file, where will that other file be? If it will be in the same location relative to your program, use a relative address. If it will be in the same absolute location, use an absolute address.","Q_Score":13,"Tags":"python,path,relative-path,absolute-path,pwd","A_Id":44772227,"CreationDate":"2017-06-27T03:54:00.000","Title":"When to use Absolute Path vs Relative Path in Python","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have B* instances running on App Engine(Python env) to serve user facing requests. Sometimes I see B* instances getting terminated due to Exceeded soft private memory limit \nI understand that increasing the instance class will solve the issue but\nI have few queries regarding requests that are present in the Instance Pending Queue !\nAssume we have 2 instances of B* instance class and we call it let say => I-1, I-2  \n\nWhat will happen to those requests that are there in I-1 Instance Request Pending Queue after the I-1 instance gets terminated due to some reason? Will those requests gets evicted from the instance queue as this instance got terminated ?\nWill the requests in Instance Pending Queue are Dequeued from the Instance Pending Queue for I-1 and will be put in I-2 Request Queue by the Request scheduler as soon as Request Scheduler finds that I-1 is shutting down due to some reason.\n\nAny help regarding understanding these things will be highly appreciated !","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":34,"Q_Id":44795589,"Users Score":1,"Answer":"Based on my external observations of how things work, I suspect there is only a single ingress queue (per service\/module) from which requests are only handed to instances which can immediately handle them.\nThe actual parameters of this single queue (depth, waiting time, etc) would be the indicators driving the automatic\/basic instance scaling logic for that service\/module - starting and stopping instances.\nIn such architecture the death of an instance has absolutely no impact on the queued requests, they would simply be dispatched to other instance(s), either already running or specifically started to handle such request.\nNote: this is just a theory, though.","Q_Score":0,"Tags":"python,google-app-engine,google-cloud-platform","A_Id":44805435,"CreationDate":"2017-06-28T06:58:00.000","Title":"What happens to requests in Instance Request Pending Queue when a backend instance gets terminated due to \"Exceeded soft private memory limit\"?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"Are there any TFTP libraries in Python to allow the PUT transfer of binary file to an IP address.\nIdeally I would rather use a built in library if this is not possible then calling the cmd via python would be acceptable.\nUsually if TFTP is installed in windows the command in command prompt would be:\n\ntftp -i xxx.xxx.xxx.xxx put example_filename.bin\n\nOne thing to note is that python is 32bit and running on a 64bit machine. I've been unable to run tftp using subprocess.","AnswerCount":1,"Available Count":1,"Score":0.537049567,"is_accepted":false,"ViewCount":2164,"Q_Id":44796047,"Users Score":3,"Answer":"You can use TFTPy\nTFTPy is a pure Python implementation of the Trivial FTP protocol.\nTFTPy is a TFTP library for the Python programming language. It includes client and server classes, with sample implementations. Hooks are included for easy inclusion in a UI for populating progress indicators. It supports RFCs 1350, 2347, 2348 and the tsize option from RFC 2349.","Q_Score":2,"Tags":"python,tftp","A_Id":44796119,"CreationDate":"2017-06-28T07:22:00.000","Title":"Running TFTP client\/library in python","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"When i backfill a dag for specific dates, i want to run it by sequentially, i.e. i want it to be run day by day\ncompleting all the tasks for the specific day and then next day so on.. I have used the depends_on_past argument, but it is only helping me to set the dependency on tasks not in dag runs. \nexample :- Dag_A have 4 tasks , i use back fill with depends_on_past,\nAfter executing first task in Dag_A (first day) it triggers first task of Dag_A (second day), I dont want it","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":522,"Q_Id":44819809,"Users Score":0,"Answer":"There is an option to set maximum number of runs per dag in the global airflow.cfg file. The parameter to set is max_active_runs_per_dag.","Q_Score":1,"Tags":"python,workflow,pipeline,airflow,apache-airflow","A_Id":44886741,"CreationDate":"2017-06-29T08:19:00.000","Title":"airflow backfilling dag run dependancy","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a flask application where i submit tasks to celery(worker) to execute it. so that i can get the webpage back after submitting. Can i achieve same if i submit the task to Jenkins instead? Just wanted an opinion why would i use celery when i can ask Jenkins to schedule\/execute the job through Jenkins API ? still get my webpage back. I may be wrong with my approach  but anyone who can shed light on this would really appreciate. \nThe Main aim is that user submits the form which actually is task to execute and after hitting submit task detachs from web , reloads the form. Meanwhile task runs in background which celery does it efficiently but can it be done via jenkins.\nThanks","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":1256,"Q_Id":44843864,"Users Score":0,"Answer":"Couple of points below to consider to compare between celery and jenkins.\n\nCelery is specifically designed and built for running resource intensive tasks in background whereas jenkins is a more general tool for automation.\njenkins is built on java so native integration is there although plugins are available whereas celery is built with python so you can directly program the tasks in python and send it to celery or just call your shell tasks from python.\nMessage queuing - Again jenkins does not have builtin support for message brokers so queuing might be difficult for you. Celery uses rabbitmq as default to queue the tasks so your tasks never gets lost.\nCelery also provide simple callbacks so when task is completed you can run some function after it.\nNow if you ask about cpu comsumption then celery is not at all heavy","Q_Score":0,"Tags":"python,jenkins,flask,celery","A_Id":44846900,"CreationDate":"2017-06-30T10:05:00.000","Title":"Flask async job\/task submit to Celery or Jenkins","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"Been trying for the last two hours and it keeps telling me that the job already exists:\nFrom the logs:\nBackup \"datastore_backup_2017_06_30\" already exists. (\/base\/data\/home\/runtimes\/python27\/python27_lib\/versions\/1\/google\/appengine\/ext\/datastore_admin\/backup_handler.py:853) Traceback (most recent call last): File \"\/base\/data\/home\/runtimes\/python27\/python27_lib\/versions\/1\/google\/appengine\/ext\/datastore_admin\/backup_handler.py\", line 839, in _ProcessPostRequest raise BackupValidationError('Backup \"%s\" already exists.' % backup) BackupValidationError: Backup \"datastore_backup_2017_06_30\" already exists.\nHowever, there is not a job running as far as I can tell. The last time I did one was this morning:\nStarted:    June 30, 2017, 9:27 a.m.\nCompleted:  June 30, 2017, 9:28 a.m.\nAnyone hd similar or have a solution","AnswerCount":1,"Available Count":1,"Score":0.3799489623,"is_accepted":false,"ViewCount":19,"Q_Id":44850538,"Users Score":2,"Answer":"The logs are telling you exactly what the problem is.  The backup you did today at 9:27AM already has the name \"datastore_backup_2017_06_30\".  To do another, it must have a unique name.  Try adding a time to the backup filename, or change it to \"datastore_backup_2017_06_30_2\".","Q_Score":0,"Tags":"python,google-app-engine,google-cloud-datastore","A_Id":44851226,"CreationDate":"2017-06-30T15:55:00.000","Title":"Can't do manual backup of ndb datastore from datastore admin","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I have defined a DAG in a file called tutorial_2.py (actually a copy of the tutorial.py provided in the airflow tutorial, except with the dag_id changed to tutorial_2).\nWhen I look inside my default, unmodified airflow.cfg (located in ~\/airflow), I see that dags_folder is set to \/home\/alex\/airflow\/dags. \nI do cd \/home\/alex\/airflow; mkdir dags; cd dags; cp [...]\/tutorial_2.py tutorial_2.py. Now I have a dags folder matching the path set in airflow.cfg , containing the tutorial_2.py file I created earlier.\nHowever, when I run airflow list_dags, I only get the names corresponding with the default, tutorial DAGs.\nI would like to have tutorial_2 show up in my DAG list, so that I can begin interacting with. Neither python tutorial_2.py nor airflow resetdb have caused it to appear in the list.\nHow do I remedy this?","AnswerCount":4,"Available Count":4,"Score":1.0,"is_accepted":false,"ViewCount":34425,"Q_Id":44856214,"Users Score":6,"Answer":"In my understanding, AIRFLOW_HOME should link to the directory where airflow.cfg is stored. Then, airflow.cfg can apply and set the dag directory to the value you put in it. \nThe important point is : airflow.cfg is useless if your AIRFLOW_HOME is not set","Q_Score":35,"Tags":"python,airflow,apache-airflow","A_Id":44878992,"CreationDate":"2017-07-01T00:04:00.000","Title":"How to add new DAGs to Airflow?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have defined a DAG in a file called tutorial_2.py (actually a copy of the tutorial.py provided in the airflow tutorial, except with the dag_id changed to tutorial_2).\nWhen I look inside my default, unmodified airflow.cfg (located in ~\/airflow), I see that dags_folder is set to \/home\/alex\/airflow\/dags. \nI do cd \/home\/alex\/airflow; mkdir dags; cd dags; cp [...]\/tutorial_2.py tutorial_2.py. Now I have a dags folder matching the path set in airflow.cfg , containing the tutorial_2.py file I created earlier.\nHowever, when I run airflow list_dags, I only get the names corresponding with the default, tutorial DAGs.\nI would like to have tutorial_2 show up in my DAG list, so that I can begin interacting with. Neither python tutorial_2.py nor airflow resetdb have caused it to appear in the list.\nHow do I remedy this?","AnswerCount":4,"Available Count":4,"Score":1.2,"is_accepted":true,"ViewCount":34425,"Q_Id":44856214,"Users Score":17,"Answer":"I think the reason for this is because you haven't exported AIRFLOW_HOME.\nTry doing:\nAIRFLOW_HOME=\"\/home\/alex\/airflow\/dags\" airflow list_dags.\nIf that's not working than do two steps\n\nexport AIRFLOW_HOME=\"\/home\/alex\/airflow\/dags\"\nairflow list_dags\n\nI believe this should work. Give it a go?","Q_Score":35,"Tags":"python,airflow,apache-airflow","A_Id":44856401,"CreationDate":"2017-07-01T00:04:00.000","Title":"How to add new DAGs to Airflow?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have defined a DAG in a file called tutorial_2.py (actually a copy of the tutorial.py provided in the airflow tutorial, except with the dag_id changed to tutorial_2).\nWhen I look inside my default, unmodified airflow.cfg (located in ~\/airflow), I see that dags_folder is set to \/home\/alex\/airflow\/dags. \nI do cd \/home\/alex\/airflow; mkdir dags; cd dags; cp [...]\/tutorial_2.py tutorial_2.py. Now I have a dags folder matching the path set in airflow.cfg , containing the tutorial_2.py file I created earlier.\nHowever, when I run airflow list_dags, I only get the names corresponding with the default, tutorial DAGs.\nI would like to have tutorial_2 show up in my DAG list, so that I can begin interacting with. Neither python tutorial_2.py nor airflow resetdb have caused it to appear in the list.\nHow do I remedy this?","AnswerCount":4,"Available Count":4,"Score":0.049958375,"is_accepted":false,"ViewCount":34425,"Q_Id":44856214,"Users Score":1,"Answer":"The issue is that you might have two airflow configs existing in your directories, so check for \/root\/airflow\/dags and if yes you require to change the dags_folder path in both airflow.cfg s","Q_Score":35,"Tags":"python,airflow,apache-airflow","A_Id":55957328,"CreationDate":"2017-07-01T00:04:00.000","Title":"How to add new DAGs to Airflow?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have defined a DAG in a file called tutorial_2.py (actually a copy of the tutorial.py provided in the airflow tutorial, except with the dag_id changed to tutorial_2).\nWhen I look inside my default, unmodified airflow.cfg (located in ~\/airflow), I see that dags_folder is set to \/home\/alex\/airflow\/dags. \nI do cd \/home\/alex\/airflow; mkdir dags; cd dags; cp [...]\/tutorial_2.py tutorial_2.py. Now I have a dags folder matching the path set in airflow.cfg , containing the tutorial_2.py file I created earlier.\nHowever, when I run airflow list_dags, I only get the names corresponding with the default, tutorial DAGs.\nI would like to have tutorial_2 show up in my DAG list, so that I can begin interacting with. Neither python tutorial_2.py nor airflow resetdb have caused it to appear in the list.\nHow do I remedy this?","AnswerCount":4,"Available Count":4,"Score":0.049958375,"is_accepted":false,"ViewCount":34425,"Q_Id":44856214,"Users Score":1,"Answer":"I might be using the latest airflow, the command has changed. What works for me is:\n\nexport AIRFLOW_HOME=\"~\/airflow\"\nThen run airflow dags list","Q_Score":35,"Tags":"python,airflow,apache-airflow","A_Id":69834752,"CreationDate":"2017-07-01T00:04:00.000","Title":"How to add new DAGs to Airflow?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to create a python script (widget.py) that will get a JSON feed from an arbitrary resource. I can't get the python script to execute on localhost. Here are the steps I have followed:\n\nIn etc\/apache2\/httpd.conf I enabled LoadModule cgi_module libexec\/apache2\/mod_cgi.so\nRestarted Apache sudo apachectl restart\nAdded a .htaccess file to my directory:\n<Directory \"widget.py\">\n  Options +ExecCGI\n  AddHandler cgi-script .py\n<\/Directory>\nNOTE: I will eventually need to deploy this on a server where I won't have access to the apache2 directory.\nNavigated to http:\/\/localhost\/~walter\/widget\/widget.py\n\nI get a 500 server error. Log file contents:\n[Sat Jul 01 08:51:00.922413 2017] [core:info] [pid 75403] AH00096: removed PID file \/private\/var\/run\/httpd.pid (pid=75403)\n[Sat Jul 01 08:51:00.922446 2017] [mpm_prefork:notice] [pid 75403] AH00169: caught SIGTERM, shutting down\nAH00112: Warning: DocumentRoot [\/usr\/docs\/dummy-host.example.com] does not exist\nAH00112: Warning: DocumentRoot [\/usr\/docs\/dummy-host2.example.com] does not exist\n[Sat Jul 01 08:51:01.449227 2017] [mpm_prefork:notice] [pid 75688] AH00163: Apache\/2.4.25 (Unix) PHP\/5.6.30 configured -- resuming normal operations\n[Sat Jul 01 08:51:01.449309 2017] [core:notice] [pid 75688] AH00094: Command line: '\/usr\/sbin\/httpd -D FOREGROUND'\nDo I need to enable cgi in \/etc\/apache2\/users\/walter\/http.conf? Should I?","AnswerCount":3,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":3573,"Q_Id":44862432,"Users Score":0,"Answer":"1, 2. Ok.\n\nAre .htaccess files allowed in \/etc\/apache2\/httpd.conf ?\n\n<Directory \"widget.py\"> \u2014 I think you want <File \"widget.py\">.\n\nLook into error log \u2014 what is the error?","Q_Score":1,"Tags":"python,apache,.htaccess,httpd.conf,macos-sierra","A_Id":44862745,"CreationDate":"2017-07-01T15:12:00.000","Title":"Executing python script on Apache in MacOS Sierra","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I am trying to create a python script (widget.py) that will get a JSON feed from an arbitrary resource. I can't get the python script to execute on localhost. Here are the steps I have followed:\n\nIn etc\/apache2\/httpd.conf I enabled LoadModule cgi_module libexec\/apache2\/mod_cgi.so\nRestarted Apache sudo apachectl restart\nAdded a .htaccess file to my directory:\n<Directory \"widget.py\">\n  Options +ExecCGI\n  AddHandler cgi-script .py\n<\/Directory>\nNOTE: I will eventually need to deploy this on a server where I won't have access to the apache2 directory.\nNavigated to http:\/\/localhost\/~walter\/widget\/widget.py\n\nI get a 500 server error. Log file contents:\n[Sat Jul 01 08:51:00.922413 2017] [core:info] [pid 75403] AH00096: removed PID file \/private\/var\/run\/httpd.pid (pid=75403)\n[Sat Jul 01 08:51:00.922446 2017] [mpm_prefork:notice] [pid 75403] AH00169: caught SIGTERM, shutting down\nAH00112: Warning: DocumentRoot [\/usr\/docs\/dummy-host.example.com] does not exist\nAH00112: Warning: DocumentRoot [\/usr\/docs\/dummy-host2.example.com] does not exist\n[Sat Jul 01 08:51:01.449227 2017] [mpm_prefork:notice] [pid 75688] AH00163: Apache\/2.4.25 (Unix) PHP\/5.6.30 configured -- resuming normal operations\n[Sat Jul 01 08:51:01.449309 2017] [core:notice] [pid 75688] AH00094: Command line: '\/usr\/sbin\/httpd -D FOREGROUND'\nDo I need to enable cgi in \/etc\/apache2\/users\/walter\/http.conf? Should I?","AnswerCount":3,"Available Count":2,"Score":0.2605204458,"is_accepted":false,"ViewCount":3573,"Q_Id":44862432,"Users Score":4,"Answer":"Got it to work. Here are the steps that I followed:\n\nIn etc\/apache2\/httpd.conf I uncommented:\nLoadModule cgi_module libexec\/apache2\/mod_cgi.so\nRestarted Apache sudo apachectl restart\nList itemAdded a .htaccess file to my directory with the following contents:\nOptions ExecCGI\n AddHandler cgi-script .py\n Order allow,deny\n Allow from all\nAdded #!\/usr\/bin\/env python to the top of my python script\nIn terminal enabled execution of the python script using: chmod +x widget.py","Q_Score":1,"Tags":"python,apache,.htaccess,httpd.conf,macos-sierra","A_Id":44865681,"CreationDate":"2017-07-01T15:12:00.000","Title":"Executing python script on Apache in MacOS Sierra","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I have Python scripts in Linux Server.\nI have multiple scripts in directory example \/home\/python\/scripts\nall users use same username \"python\" to login linux server.\nIf multiple users are run same script is there any issues?\nLike if one user start execute one script before finishing this script another user also started same script. Is variable got overwrite ?\nWhat is best way to handle this kind of things.","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":917,"Q_Id":44866952,"Users Score":1,"Answer":"So long as the state is not shared in any way between the different interpreters executing the scripts (re each user running the script gets a different Python interpreter process), there should be no problem. However if there is some shared context (such as a log file each process is simultaneously reading\/writing from assuming mutual exclusivity), you will very likely have trouble. The trouble could be mitigated in many ways whether through mutexes or other synchronized access.","Q_Score":0,"Tags":"python,linux","A_Id":44866968,"CreationDate":"2017-07-02T02:23:00.000","Title":"Python script to run same script by multiple users","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Is there any  python\/Shell  script to make memory 100% usage for 20 minutes.\nMemory size is very big 4TB. \nOperating System Linux.\nPython version 2.7","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":259,"Q_Id":44882144,"Users Score":0,"Answer":"Is there any python\/Shell script to make memory 100% usage for 20 minutes.\n\nTo be technical, we need to be precise. 100% usage of the whole memory by a single process isn't technically possible. Your memory is shared with other processes. The fact that the kernel is in-memory software debunks the whole idea. \nPlus, a process might start another process, say you run Python from the shell, now you have two processes (the shell and Python) each having their own memory areas.\nIf you mean by that a process that can consume most of ram space, then yes that's not impossible.","Q_Score":0,"Tags":"python,python-2.7,shell","A_Id":44884687,"CreationDate":"2017-07-03T09:31:00.000","Title":"shell\/Python script to utilize memory 100% for 20 mins","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a .c file and this file has to be executed only at a particular time interval say 9pm.\nSo, please let me know if there is any possibility of achieving this via python scripting.","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":140,"Q_Id":44882981,"Users Score":0,"Answer":"What previous answers miss is your question about how to trigger at a specific time, e.g. 9pm. \nYou can use cron for this. It's a *nix utility that executes arbitrary commands on a time schedule you specify. \nYou could set cron to run your C program directly, or to launch a Python wrapper that then starts your C executable. \nTo get started: type crontab -e and follow the examples.","Q_Score":0,"Tags":"python,c","A_Id":44883166,"CreationDate":"2017-07-03T10:13:00.000","Title":"Python script to execute a C program at particular time interval","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I would like to install python 3.5 packages so they would be available in Jupyter notebook with pyspark3 kernel.\nI've tried to run the following script action:\n#!\/bin\/bash\nsource \/usr\/bin\/anaconda\/envs\/py35\/bin\/activate py35\nsudo \/usr\/bin\/anaconda\/envs\/py35\/bin\/conda install -y keras tensorflow theano gensim\n\nbut the packages get installed on python 2.7 and not in 3.5","AnswerCount":3,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":2656,"Q_Id":44902885,"Users Score":0,"Answer":"Have you tried installing using pip? \nIn some cases where you have both Python 2 and Python 3, you have to run pip3 instead of just pip to invoke pip for Python 3.","Q_Score":1,"Tags":"python,azure,pyspark,jupyter-notebook,azure-hdinsight","A_Id":44903656,"CreationDate":"2017-07-04T10:02:00.000","Title":"how to install python package on azure hdinsight pyspark3 kernel?","Data Science and Machine Learning":1,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I've been developing a set of scripts in PyCharm using C:\/Python27\/python.exe interpreter...\nI'm creating a batch file and then running all of the scripts through this file from the cmd shell however the shell is not recognizing most modules because it is using the wrong interpreter (path for anaconda instead)...\nHow do I change the shell to use the C:\/Python27\/python.exe interpreter as default all the time instead?\nI've tried looking this up but it all points to just adding the interpreter path, which I have... but the shell still uses the anaconda interpreter.\nAny help appreicated","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":185,"Q_Id":44907749,"Users Score":0,"Answer":"Found a solution to my problem...\nI needed to use:\nset path=%path%;C:\\Python27\nThis switched interpreter.\nCheers","Q_Score":0,"Tags":"python","A_Id":44908141,"CreationDate":"2017-07-04T13:49:00.000","Title":"Choosing specific python interpreter in the shell","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm on linux, I wrote a python script that is located in lets say \/home\/python\/main.py. Every time I run it, it asks for a path using raw_input. I run it from a different place every time.\nsay I run it from \/home\/test like this python \/home\/python\/main.py from terminal.\nHow can I give it the path I'm currently in, if possible. I don't want to hardcode paths. So I want to give it the path from which I'm using the terminal. I don't want to do pwd and copy paths, \nI'm wondering if there's something like ~ which always points to home directory. Something similar which points to the users current directory.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":44,"Q_Id":44914376,"Users Score":3,"Answer":"Use os.getcwd - returns current working directory. Requires import os.\nAlso its slightly unclear, what exactly do you want. You dont really need current working directory in python - every relative path in python will be interpreter as if starting in current directory. So simply use relative paths (in linux those are ones NOT starting with \/) - this will work as long as you dont change current directory (which is a bad habbit anyway).","Q_Score":0,"Tags":"python,bash,python-2.7","A_Id":44914400,"CreationDate":"2017-07-04T21:49:00.000","Title":"How to find the user current path?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I struggle with a very basic problem in the Atom editor. I simply want to run a python file but am unable to just open a command line or console. In other forums I read, I need to install Script. I tried to do it in Packages -> Settings View. But if I type 'script' in the install packages field, only this response appears: Searching for \u201cscript\u201d failed.Show output\u2026\nHow can I make Atom to find this packages?\nThx","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":4217,"Q_Id":44926214,"Users Score":0,"Answer":"press ctrl+, to open your preferences\ngo to install\nsearch for script\npress install","Q_Score":1,"Tags":"python,command-line,installation,atom-editor","A_Id":44926753,"CreationDate":"2017-07-05T12:24:00.000","Title":"Installing Script in Atom","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a centos 7 machine , which has 2 python versions , python giver sveriosn 2.7.5 and python2.7 givers version . 2.7.13. I want to make 2.7.13 as default version, such that when I check python --version it gives 2.7.13 and not 2.7.5 . I have added both to PATH.","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":97,"Q_Id":44939999,"Users Score":1,"Answer":"If you set Python 2.7.13 to your PATH and not 2.7.5, the used Python should be 2.7.13.\nOr you can try to set the PYTHONPATH variable","Q_Score":0,"Tags":"linux,python-2.7,centos7","A_Id":44940122,"CreationDate":"2017-07-06T04:46:00.000","Title":"Different python versions in centos","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am very new to python, but it seems like I should be able to activate the python environment by simply typing python. Unfortunately, I keep getting the error \"'python' is not recognized as an internal or external command,\noperable program or batch file.\" I can access python through it's path at C:\\Python27\\python, which works fine, but I can't seem to get the shortcut to work. \nDetails: I manually installed Python 2.7, and I run Windows 10. I have tried going to the Advanced System Settings to add the PATH manually, but with no result. None of the tutorials or help articles have suggestions for what to do if adding it manually fails. Is there any way I can fix this? It seems like a small thing, but it's really bugging me.","AnswerCount":3,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":381,"Q_Id":44940094,"Users Score":0,"Answer":"Your path is bugged:\nC:\\Program Files\\Git\\cmd;\"C:\\Windows;C:\\Windows\\System32;C:\\Python27\";C\u200c\u200b:\\Python27\\Scripts\nshould not have those random \" characters.","Q_Score":0,"Tags":"python,python-2.7","A_Id":44940434,"CreationDate":"2017-07-06T04:56:00.000","Title":"Unable to add python to PATH","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am very new to python, but it seems like I should be able to activate the python environment by simply typing python. Unfortunately, I keep getting the error \"'python' is not recognized as an internal or external command,\noperable program or batch file.\" I can access python through it's path at C:\\Python27\\python, which works fine, but I can't seem to get the shortcut to work. \nDetails: I manually installed Python 2.7, and I run Windows 10. I have tried going to the Advanced System Settings to add the PATH manually, but with no result. None of the tutorials or help articles have suggestions for what to do if adding it manually fails. Is there any way I can fix this? It seems like a small thing, but it's really bugging me.","AnswerCount":3,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":381,"Q_Id":44940094,"Users Score":1,"Answer":"Your path configuration is incorrect; your path should look like this:\n\nC:\\ProgramData\\Oracle\\Java\\javapath;C:\\WINDOWS\\system32;C:\\\u200c\u200bWINDOWS;C:\\WINDOWS\\S\u200c\u200bystem32\\Wbem;C:\\WIND\u200c\u200bOWS\\System32\\Windows\u200c\u200bPowerShell\\v1.0\\;C:\\\u200c\u200bProgram\n  Files (x86)\\MiKTeX 2.9\\miktex\\bin\\;C:\\Program Files\\jEdit;C:\\Program\n  Files\\Git\\cmd;C:\\Python27\\;C\u200c\u200b:\\Python27\\Scripts;C\u200c\u200b:\\Users\\Maria\\AppDat\u200c\u200ba\\Local\\Microsoft\\Wi\u200c\u200bndowsApps;\n\nAfter changing the path, make sure you restart the command prompt or any other application that needs to use Python (or you can just restart the computer).","Q_Score":0,"Tags":"python,python-2.7","A_Id":44940481,"CreationDate":"2017-07-06T04:56:00.000","Title":"Unable to add python to PATH","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm currently working on a larger Apache Beam pipeline with the Python API which reads data from BigQuery and in the end writes it back to another BigQuery task. \nOne of the transforms needs to use a binary program to transform the data, and for that it needs to load a 23GB file with binary lookup data. So starting and running the program takes a lot of overhead (takes about 2 minutes to load\/run each time) and RAM, and it wouldn't make sense to start it up for just a single record. Plus the 23GB file would need to be copied locally from Cloud Storage every time.\nThe workflow for the binary would be:\n\nCopy 23GB file from cloud storage if it's not there already\nSave records to a file\nrun the binary with call()\nread the output of the binary and return it\n\nThe amount of records the program can process at a time is basically unlimited, so it would be nice to get a somewhat-distributed Beam Transform, where I could specify a number of records to be processed at once (say 100'000 at a time), but still have it distributed so it can run it for 100'000 records at a time on multiple nodes.\nI don't see Beam supporting this behaviour, it might be possible to hack something together as a KeyedCombineFn operation that collects records based on some split criterion\/key and then runs the binary in the merge_accumulators step over the accumulated records. But this seems very hackish to me.\nOr is it possible to GroupByKey and process groups as batches? Does this guarantee that each group is processed at once, or can groups be split behind the scenes by Beam?\nI also saw there's a GroupIntoBatches in the Java API, which sounds like what I'd need, but isn't available in the Python SDK as far as I can tell.\nMy two question are, what's the best way (performance-wise) to achieve this use-case in Apache Beam, and if there isn't a good solution, is there some other Google Cloud service that might be better suited that could be used like Beam --> Other Service --> Beam ?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":1299,"Q_Id":44942445,"Users Score":1,"Answer":"Groups cannot be split behind the scenes, so using a GroupByKey should work. In fact, this is a requirement since each individual element must be processed on a single machine and after a GroupByKey all values with a given key are part of the same element.\nYou will likely want to assign random keys. Keep in mind that if there are too many values with a given key it may also be difficult to pass all of those values to your program -- so you may also want to limit how many of the values you pass to the program at a time and\/or adjust how you assign keys.\nOne trick for assigning random keys is to generate the random number in start bundle (say 1 to 1000) and then in process element just increment this and wrap 1001 to 1000. This avoids generating a random number for every element, and still ensures a good distribution of keys.\nYou could create a PTransform for both this logic (divide a PCollection<T> into PCollection<List<T>> chunks for processing), and that would be potentially reusable in similar situations.","Q_Score":0,"Tags":"python,google-cloud-platform,google-cloud-dataflow,apache-beam","A_Id":44953748,"CreationDate":"2017-07-06T07:31:00.000","Title":"Batch Processing in Apache Beam with large overhead","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"How can I set an environment variable with the location of the pytest.ini, tox.ini or setup.cfg for running pytest by default?\nI created a docker container with a volume pointing to my project directory, so every change I make is also visible inside the docker container. The problem is that I have a pytest.ini file on my project root which won't apply to the docker container. \nSo I want to set an environment variable inside the docker container to specify where to look for the pytest configuration. Does anyone have any idea how could I do that?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":7501,"Q_Id":44958993,"Users Score":6,"Answer":"There is no way to do that. You can use a different pytest configuration using pytest -c but tox.ini and setup.cfg must reside in the top-level directory of your package, next to setup.py.","Q_Score":5,"Tags":"python,docker,pytest,pytest-django","A_Id":44959229,"CreationDate":"2017-07-06T21:16:00.000","Title":"pytest: environment variable to specify pytest.ini location","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am looking for using KCL on SparkStreaming using pySpark.\nAny pointers would be helpful.\nI tried few given by spark Kinesis Ingeration link.\nBut i get the error for JAVA class reference.\nSeems Python is using JAVA class.\ni tried linking\nspark-streaming-kinesis-asl-assembly_2.10-2.0.0-preview.jar\nwhile trying to apply the KCL app on spark.\nbut still having the error.\nPlease let me know if anyone has done it already.\nif i search online i get more about Twitter and Kafka.\nNot able to get much help with regard to Kinesis.\nspark verision used: 1.6.3","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":374,"Q_Id":44962107,"Users Score":0,"Answer":"I encountered the same problem. The kinesis-asl jar had several files missing.\nTo overcome this problem, I had included the following jars in my spark-submit.\n\namazon-kinesis-client-1.9.0.jar\naws-java-sdk-1.11.310.jar\njackson-dataformat-cbor-2.6.7.jar\n\nNote: I am using Spark 2.3.0 so the jar versions listed might not be the same as those you should be using for your spark version.\nHope this helps.","Q_Score":0,"Tags":"python-2.7,spark-streaming,amazon-kcl","A_Id":49734017,"CreationDate":"2017-07-07T03:31:00.000","Title":"using Kinesis Client library with Spark Steaming PySpark","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm running Ubuntu 17.04 (fresh install) and already installed pip. However, when I try to install anything I get this:\n\nCommand \"python setup.py egg_info\" failed with error code 1 in\n  \/tmp\/pip-build-kBfUEp\/kivy\/\n\nDepending on what I'm installing, I get the same thing but slighty different. For example:\n\nCommand \"python setup.py egg_info\" failed with error code 1 in\n  \/tmp\/pip-build-zqj5Ka\/pypiwin32\/\n\nI've tried everything and I have absolute no idea how to solve this.\nThanks.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":2087,"Q_Id":44981793,"Users Score":0,"Answer":"I've had the same error, I used the following code to get out of this error:\n(I was working on centOS 7)\n1) sudo yum install MySQL-devel\n2) sudo yum install openssl - devel\n3) sudo yum install python-devel\nI hope this works for you.","Q_Score":0,"Tags":"python,installation,pip","A_Id":47015021,"CreationDate":"2017-07-08T01:59:00.000","Title":"python setup.py egg_info failed with error code 1","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have .bat file which outputs data in console, than I need to read that data with  python script and run through \"if cycles\"\nThe question is: How to read that data with python script?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":24,"Q_Id":44986563,"Users Score":0,"Answer":"There are two approaches you might take:\n\nUse a pipe (the | character) in your command line to redirect the output that is going to the console to the Python script, and code the Python script to read from stdin.\nRedirect the output that is going to the console to a file (with >filename) and then code the Python script to read from that file.","Q_Score":0,"Tags":"python,c++","A_Id":44987001,"CreationDate":"2017-07-08T13:07:00.000","Title":"Redirect data from console to the python script","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am migrating my personal hobby python web application from 127.0.0.1 to cloud 9 lately, but found myself completely new to the idea of setting up ssl certificate. I did some online research on openssl and its python wrapper but still couldn't find any definitive guide on how to set it up in practice, specifically for the cloud 9 IDE platform.\nCould someone please give a walkthough, or point out some references link here? Thanks.\nBy the way, I'm using cherrypy for the python server.\nEDIT: specifically, I have the following questions:\n\nis it requred to run openssl from the server(in my case, cloud9 bash), or I can run openssl from my local laptop then upload the generated key and cert?\ndoes it make any sense to use passphrase to protect the key? I don't see any point here, correct me if I'm wrong please\nhow to install it to cloud9?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":184,"Q_Id":44996563,"Users Score":0,"Answer":"Cloud9 runs your app behind an https proxy, so you need to just use http, since cloud9 proxy won't accept your self signed certificate.","Q_Score":0,"Tags":"python,ssl,cloud9-ide","A_Id":44998382,"CreationDate":"2017-07-09T12:49:00.000","Title":"Could someone please provide a walkthrough on how to setup a self signing ssl certificate on cloud 9?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"FindPythonLibs.cmake is somehow finding Python versions that don't exist\/were uninstalled. \nWhen I run find_package(PythonLibs 3 REQUIRED) CMake properly finds my Python3.6 installation and adds its include path, but then I get the error\nNo rule to make target 'C:\/Users\/ultim\/Anaconda2\/libs\/python27.lib', needed by 'minotaur-cpp.exe'.  Stop.\nThis directory doesn't exist, and I recently uninstalled Anaconda and the python that came with it. I've looked through my environment variables and registry, but find no reference to this location.\nWould anyone know where there might still be a reference to this location?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":114,"Q_Id":44997969,"Users Score":0,"Answer":"Since the \"REQUIRED\" option to find_package() is not working, you can be explicit about which Python library using CMake options with cache variables:\ncmake -DPYTHON_INCLUDE_DIR=C:\\Python36\\include -DPYTHON_LIBRARY=C:\\Python36\\libs\\python36.lib ..","Q_Score":1,"Tags":"python,cmake,anaconda","A_Id":44999337,"CreationDate":"2017-07-09T15:20:00.000","Title":"CMake's find packages finds nonexisting python library","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"For whatever reason, when I click on launch for any app in the Navigator, will say launching app with the status bar moving but it will eventually stop and the app never opens.  I have tried starting with administrative privileges and I have even tried uninstalling and reinstalling and then rebooting but still the apps never launch.","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":1414,"Q_Id":45002397,"Users Score":0,"Answer":"I just had this problem! The cause was in a corrupted registry affecting the launch of CMD.EXE (Used by Navigator to launch applications).\nSolution: Empty the HKEY_CURRENT_USER\\Software\\Microsoft\\Command Processor\\AutoRun key\n(It contained several occurrences of \"if exist\"!?)\nIf you used \"conda init\", then you will need to re-run the command.","Q_Score":3,"Tags":"python,anaconda,navigator","A_Id":67814968,"CreationDate":"2017-07-10T00:48:00.000","Title":"Anaconda Navigator Applications not launching apps","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"For whatever reason, when I click on launch for any app in the Navigator, will say launching app with the status bar moving but it will eventually stop and the app never opens.  I have tried starting with administrative privileges and I have even tried uninstalling and reinstalling and then rebooting but still the apps never launch.","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":1414,"Q_Id":45002397,"Users Score":0,"Answer":"If you are using Debian distribution os then simply you can run following command in your shell after installing anaconda distribution.\nexport PATH= YOUR_ANACONDA_INSTALLATION_FOLDER_LOCATION\/bin:PATH\nthen run,\nanaconda-navigator\nfor example mine anaconda3 was installed at root\/anaconda3,So i used following commands:\n\u250c\u2500\u2500[root@kali]\u2500[\/]\n\u2514\u2500\u2500\u257c # export PATH=\/root\/anaconda3\/bin:PATH\n\u250c\u2500[root@kali]\u2500[\/]\n\u2514\u2500\u2500\u257c # anaconda-navigator\nand that worked fine for me:)","Q_Score":3,"Tags":"python,anaconda,navigator","A_Id":59505434,"CreationDate":"2017-07-10T00:48:00.000","Title":"Anaconda Navigator Applications not launching apps","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I was on freelancer website and I found this work proposal:\n\nProject Description\nHello\nWe need experience developer in python.\nOnly bit that person who has a experience in python and Linux.\nI want to execute python code in Booting time before execute Operating\n  System Desktop.\n\nI know that unless I candidate, I won't have any detail about the project, but anyway it seems odd to me. \nFrom my understanding python is interpreted, which means that it needs a virtual environment, and that's what makes it platform independent. Therefore how can a python script (which doesn't convert 1:1 to machine instructions) run before the operative system? Since I know little about what's going on at boot time (I guess some pre-defined instructions laying in the motherboard ROM are executed, then the bootloader loads in the RAM the OS, and the program counter holds the address for the entry point of the OS itself, but I am just supposing) I ask you whether such a thing could be possible.","AnswerCount":1,"Available Count":1,"Score":0.537049567,"is_accepted":false,"ViewCount":112,"Q_Id":45014226,"Users Score":3,"Answer":"Linux, being a UNIX type OS, has the concept of runlevels. Each runlevel has a certain number of services stopped or started, giving the user control over the behavior of the machine. As far as I know for Linux, seven runlevels exist, numbered from zero to six. The \"Operating System Desktop\" becomes available at run level 5. At boot time the system will pass through several other runlevels before getting to 5. At level 3 the system will be have Multi-User Mode with Networking, and this would be a good level to run what ever python script you need. Maybe check into configuring Linux init scripts.","Q_Score":2,"Tags":"python,boot","A_Id":45014631,"CreationDate":"2017-07-10T14:07:00.000","Title":"Python before booting?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to create a function using Lambda in Python on Linux. I have tried to use pyad, but it gave me Exception: Must be running Windows in order to use pyad.\nWhat other way can i create user and group in AD?\nThanks","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":1731,"Q_Id":45014964,"Users Score":0,"Answer":"I can see 2 aspects that you should pay attention.\n\nLambda runs in a Linux environment. So, if you have some library that uses internal resources from windows, it won't work on AWS Lambda environment. You should search another option, like python-ldap or something similar.\nLambda environment provides only basic python modules. For sure pyad or python-ldap is not included. So, if you want to use it, make sure you will add this module in your zip lambda file.","Q_Score":0,"Tags":"python,linux,lambda,active-directory,aws-lambda","A_Id":45064312,"CreationDate":"2017-07-10T14:38:00.000","Title":"How to create user and group in AD using Lambda","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm thinking of starting to use Apache Airflow for a project and am wondering how people manage continuous integration and dependencies with airflow. More specifically\nSay I have the following set up\n3 Airflow servers: dev staging and production.\nI have two python DAG'S whose source code I want to keep in seperate repos.\nThe DAG's themselves are simple, basically just use a Python operator to call main(*args, **kwargs). However the actually code that's run by main is very large and stretches several files\/modules.\nEach python code base has different dependencies\nfor example,\nDag1 uses Python2.7 pandas==0.18.1, requests=2.13.0\nDag2 uses Python3.6 pandas==0.20.0 and Numba==0.27 as well as some cythonized code that needs to be compiled\nHow do I manage Airflow running these two Dag's with completely different dependencies?\nAlso, how do I manage the continuous integration of the code for both these Dags into each different Airflow enivornment (dev, staging, Prod)(do I just get jenkins or something to ssh to the airflow server and do something like git pull origin BRANCH)\nHopefully this question isn't too vague and people see the problems i'm having.","AnswerCount":1,"Available Count":1,"Score":0.537049567,"is_accepted":false,"ViewCount":1922,"Q_Id":45015116,"Users Score":3,"Answer":"We use docker to run the code with different dependencies and DockerOperator in airflow DAG, which can run docker containers, also on remote machines (with docker daemon already running). We actually have only one airflow server to run jobs but more machines with docker daemon running, which the airflow executors call.\nFor continuous integration we use gitlab CI with the Gitlab container registry for each repository. This should be easily doable with Jenkins.","Q_Score":6,"Tags":"python,airflow","A_Id":45117737,"CreationDate":"2017-07-10T14:46:00.000","Title":"Apache Airflow Continous Integration Workflow and Dependency management","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"In python i want to get file was located in rpm package, can i open this package, get file et save this in a python variable ? (without extract all package in \/tmp)","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":986,"Q_Id":45036243,"Users Score":0,"Answer":"Most solutions are variants of rpm2cpio | cpio which has the disadvantage that the entire cpio ball is unpacked on the file system rather than extracting a single file onto a pipeline that can be read into a python variable. This is largely a limitation on the cpio(1) archive file selection mechanism.\nThese days GNU tar can\/will handle cpio formats, and so a GNU tar (which can extract a single file from an archive) rpm2cpio | tar pipeline might be able to extract a single file without unpacking the entire archive.","Q_Score":0,"Tags":"python,extract,rpm","A_Id":45277220,"CreationDate":"2017-07-11T13:41:00.000","Title":"python get file in rpm","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm running ODOO 10 from source code in Eclipse on Windows 10. It's running ok in the web interface (on localhost)\nI want to control the odoo via command line at the same time. Can I do so while its running in the web interface?\nIf so how do I invoke the odoo commands to the server?","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":1605,"Q_Id":45043181,"Users Score":0,"Answer":"You can try below\npython .\/odoo-bin -c odoo.conf\nHope this help you","Q_Score":1,"Tags":"python,windows,eclipse,odoo-10","A_Id":56924563,"CreationDate":"2017-07-11T19:37:00.000","Title":"How to control odoo 10 from command line while its running in the web","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"So I've decided to learn Python and after getting a handle on the basic syntax of the language, decided to write a \"practice\" program that utilizes various modules.\nI have a basic curses interface made already, but before I get too far I want to make sure that I can redirect standard input and output over a network connection. In effect, I want to be able to \"serve\" this curses application over a TCP\/IP connection.\nIs this possible and if so, how can I redirect the input and output of curses over a network socket?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":779,"Q_Id":45062817,"Users Score":2,"Answer":"This probably won't work well.  curses has to know what sort of terminal (or terminal emulator, these days) it's talking to, in order to choose the appropriate control characters for working with it.  If you simply redirect stdin\/stdout, it's going to have no way of knowing what's at the other end of the connection.\nThe normal way of doing something like this is to leave the program's stdin\/stdout alone, and just run it over a remote login.  The remote access software (telnet, ssh, or whatever) will take care of identifying the remote terminal type, and letting the program know about it via environment variables.","Q_Score":2,"Tags":"python,sockets,curses","A_Id":45063103,"CreationDate":"2017-07-12T16:09:00.000","Title":"Python3 - curses input\/output over a network socket?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Trying to start Anaconda navigator in Linux. Getting this error:\nbyte indices must be integers or slices, not str","AnswerCount":2,"Available Count":1,"Score":0.2913126125,"is_accepted":false,"ViewCount":1155,"Q_Id":45068082,"Users Score":3,"Answer":"Found a solution\nThis is what to do:\nrun: $ source activate root and then \n$ anaconda-navigator","Q_Score":2,"Tags":"python,anaconda","A_Id":45068095,"CreationDate":"2017-07-12T21:50:00.000","Title":"Anaconda-navigator: byte indices must be integers or slices, not str","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I need to use an old-fashioned DOS\/Windows executable (the source is not available). It uses two input files and produces one output file. \nI have to run this several thousands times, using different input files. I wrote a simple python script looping over input files to automate this. \nThe problem is that this exe finishes every single run with the immortal \"press Enter\".\nI start the script, keep the key pressed, 'returns' accumulate in the bufor and the script runs for a while producing several outputs. \nIs there any more elegant way to proceed (i.e. without using the finger and staring at the monitor)? \nI have already tried some obvious solutions (e.g. os.system('return'), os.system('\\n')) but they do not work.\nNext day edit:\n@Eric, many thanks for the code, it works. I also thank others who contribute, and sorry for slopply written question and unformatted code in the comment (it was 3.30 am :)","AnswerCount":3,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":4732,"Q_Id":45069855,"Users Score":0,"Answer":"Have you tried os.system(\u2018\\r\\n\u2019)? I think that\u2019s the newline character on windows.\nEdit: Your answer also used a forward slash instead of a backslash--definitely try the other way too, unless that\u2019s just a typo.","Q_Score":4,"Tags":"python,operating-system","A_Id":45069902,"CreationDate":"2017-07-13T01:07:00.000","Title":"Python (os): how to simulate pressing Enter while executing an external application","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I need to use an old-fashioned DOS\/Windows executable (the source is not available). It uses two input files and produces one output file. \nI have to run this several thousands times, using different input files. I wrote a simple python script looping over input files to automate this. \nThe problem is that this exe finishes every single run with the immortal \"press Enter\".\nI start the script, keep the key pressed, 'returns' accumulate in the bufor and the script runs for a while producing several outputs. \nIs there any more elegant way to proceed (i.e. without using the finger and staring at the monitor)? \nI have already tried some obvious solutions (e.g. os.system('return'), os.system('\\n')) but they do not work.\nNext day edit:\n@Eric, many thanks for the code, it works. I also thank others who contribute, and sorry for slopply written question and unformatted code in the comment (it was 3.30 am :)","AnswerCount":3,"Available Count":2,"Score":0.0665680765,"is_accepted":false,"ViewCount":4732,"Q_Id":45069855,"Users Score":1,"Answer":"Use Python's subprocess module and run your executable with Popen.\nThen you can send \"enter\" to the process with communicate.","Q_Score":4,"Tags":"python,operating-system","A_Id":45070691,"CreationDate":"2017-07-13T01:07:00.000","Title":"Python (os): how to simulate pressing Enter while executing an external application","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Is there a way within Python to set an OS environment var that lives after the Python script has ended?.. So if I assign a var within the Python script and the script ends I want it to be available once I run a \"printenv\" via terminal. I've tried using the sh library using os.system but once the program finishes that var is not available via \"printenv\".","AnswerCount":2,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":264,"Q_Id":45090277,"Users Score":2,"Answer":"You cannot do that. Child processes inherit environment of parent processes by default, but the opposite is not possible.\nIndeed, after the child process has started, the memory of all other processes is protected from it (segregation of context execution). This means it cannot modify the state (memory) of another process.\nAt best it can send IPC signals... \nMore technical note: you need to debug a process (such as with gdb) in order to control its internal state. Debuggers use special kernel APIs to read and write memory or control execution of other processes.","Q_Score":1,"Tags":"python","A_Id":45090303,"CreationDate":"2017-07-13T20:23:00.000","Title":"Set OS env var via python","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a docker image that takes about 45min to build.  As I'm working with it, I'm finding that I sometimes need to add python packages to it for the code I'm working on.  I want to be able to install these packages such that it persists.\nWhat's the best way to achieve this?\nG","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":185,"Q_Id":45107012,"Users Score":2,"Answer":"docker builds the container image from cache if nothing is changed. When it founds a change in a line, it executes again all the lines from the change. So, if you need to add libraries, just add more lines at the end of the dockerfile.","Q_Score":0,"Tags":"python,docker,docker-compose","A_Id":45107280,"CreationDate":"2017-07-14T15:46:00.000","Title":"Best way to enhance a Docker image for small changes that need to be persisted","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"We have a front-end server that is executing dags directly with the dag API (DagBag(), get_dag() and then dag_run())\nDags run fine, the problem is, that we could not find a way to execute such dags with specific arguments.\nThe closest solution was to use the Variable API, which uses set() and get() methods, but these variables are global and might have conflicts when working in concurrent operations that might use same variable names.\nHow could we run a dag and set arguments available to its execution? We are mostly using PythonOperator.\nEdit 1:\nOur program is a Python Django front end server. So, we are speaking with Airflow through another Python program. This means we trigger dags through Python, hence, using DagBag.get_dag() to retrieve information from airflow service. run_dag() does not have a way to pass direct parameters though","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":1227,"Q_Id":45110781,"Users Score":0,"Answer":"If you use trigger_dag_run (through command line or from another dag) to trigger a dag, you can pass any json as payload.\nAnother option would be to store the argument list on a file, and store that file location as a Variable. The DAG can then pass this file location to python operator and the operator can then handle reading that file and parsing arguments from it.\nIf both these solutions don't work for your use case, giving more details about your dag and kind of arguments might help.","Q_Score":0,"Tags":"python,airflow","A_Id":45120003,"CreationDate":"2017-07-14T20:02:00.000","Title":"How to submit parameters to a Python program in Airflow?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I am using a form of Lubuntu called GalliumOS (optimized for Chromebooks).  I installed pip using $ sudo apt-get install python-pip. I then used pip install --user virtualenv and pip install virtualenv, and then when I tried to subsequently use virtualenv venv I experienced the message bash: virtualenv: command not found.\nBetween the pip installs above, I used pip uninstall virtualenv to get back to square one. The error remained after a reinstall.\nI read several other posts, but all of them seemed to deal with similar problems on MacOS. One that came close was installing python pip and virtualenv simultaneously. Since I had already installed pip, I didn't think that these quite applied to my issue. Why is pip install virtualenv  not working this way on LUbuntu \/ GalliumOS?","AnswerCount":3,"Available Count":2,"Score":0.1325487884,"is_accepted":false,"ViewCount":4437,"Q_Id":45112111,"Users Score":2,"Answer":"Are you sure pip install is \"failing\"? To me, it sounds like the directory to which pip is installing modules on your machine is not in your PATH environment variable, so when virtualenv is installed, your computer has no idea where to find it when you just type in virtualenv.\nFind where pip is installing things on your computer, and then check if the directory where the pyenv executable is placed is in your PATH variable (e.g. by doing echo $PATH to print your PATH variable). If it's not, you need to update your PATH variable by adding the following to your .bashrc or .bash_profile or etc.:\nexport PATH=\"PATH_TO_WHERE_PIP_PUTS_EXECUTABLES:$PATH\"","Q_Score":1,"Tags":"python,linux,pip,virtualenv,apt-get","A_Id":45112548,"CreationDate":"2017-07-14T21:53:00.000","Title":"bash: virtualenv: command not found \"ON Linux\"","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am using a form of Lubuntu called GalliumOS (optimized for Chromebooks).  I installed pip using $ sudo apt-get install python-pip. I then used pip install --user virtualenv and pip install virtualenv, and then when I tried to subsequently use virtualenv venv I experienced the message bash: virtualenv: command not found.\nBetween the pip installs above, I used pip uninstall virtualenv to get back to square one. The error remained after a reinstall.\nI read several other posts, but all of them seemed to deal with similar problems on MacOS. One that came close was installing python pip and virtualenv simultaneously. Since I had already installed pip, I didn't think that these quite applied to my issue. Why is pip install virtualenv  not working this way on LUbuntu \/ GalliumOS?","AnswerCount":3,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":4437,"Q_Id":45112111,"Users Score":2,"Answer":"What finally worked for me was this. I used \n$ sudo apt-get install python-virtualenv. \nI was then able to create a virtual environment using $ virtualenv venv. \nI was seeking to avoid using $ sudo pip install virtualenv, because of admonitions in other posts to not do this, and agreed, because of experiences I'd had with subsequent difficulties when doing this.","Q_Score":1,"Tags":"python,linux,pip,virtualenv,apt-get","A_Id":45114004,"CreationDate":"2017-07-14T21:53:00.000","Title":"bash: virtualenv: command not found \"ON Linux\"","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am developing some scripts that I am planning to use in my LAB. Currently I installed Python and all the required modules only locally on the station that I am working with (the development station).\nI would like to be able to run the scripts that i develop through each of my LAB stations.\nWhat is the best practice to do that ?\nWill I need to Install the same environment, except for the IDE of course, in all my stations ? If yes, then what is the recommended way to do that ?\nBy the way, is it mostly recommended to run those scripts from the command line screen (Windows) or is there any other elegant way to do that ?","AnswerCount":3,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":4897,"Q_Id":45129728,"Users Score":0,"Answer":"If you want to run a single script on multiple computers without installing Python everywhere you can \"compile\" the script to .exe using py2exe, cx_Freeze or PyInstall. The \"compilation\" actually packs Python and libraries into the generated .exe or accompanied files.\nBut if you plan to run many Python scripts you'd better install Python everywhere and distribute your scripts and libraries as Python packages (eggs or wheels).","Q_Score":4,"Tags":"python,python-3.x,automation","A_Id":45130847,"CreationDate":"2017-07-16T14:34:00.000","Title":"What is the best practice for running a python script?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I think that this problem is due to the python version. I used Anaconda with python 3.6 for learning django. Now I've to work on google app engine using python2.7. I uninstalled anaconda. Now when i run \"python\" I get:\n\"Python 3.6.1 |Continuum Analytics, Inc.| (default, May 11 2017, 13:09:58)\".\nIs there a way to default back to python2.7?\nI'm on ubuntu 16.04\nedit: problem is not due to python version","AnswerCount":3,"Available Count":1,"Score":-0.0665680765,"is_accepted":false,"ViewCount":3516,"Q_Id":45130283,"Users Score":-1,"Answer":"For those who are using Windows and still facing the same issue, the easiest way is to remove all the other python versions except version 2.7x.","Q_Score":1,"Tags":"python,google-app-engine,ubuntu,anaconda,google-app-engine-python","A_Id":54668398,"CreationDate":"2017-07-16T15:28:00.000","Title":"When I run localserver on googleappengine error is \"File \"~\/dev_appserver.py\", line 102, in  assert sys.version_info[0] == 2 AssertionError\"","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I am going to 3.6 now....\n1) I see for my worker servers ...in 2.7 I used gevent with great success for running one worker per core with N gevent threads per core...\n2) For my web dev..for low level..close to CGI as possible I used bottle with nginx\/uWSGI with the gevent loop\n3) For api's I used Flask with nginx\/uWSGI with the gevent loop\nMy api apps are screaming fast...and faster then nodejs for async calls to my backend databases...\nEnter 3.6 ... I am confused....\n1) It appears I can run my workers using asyncio since not dependent on a framework...so here I am OK\n2) It appears that gevent is available for 3.6 and I assume I can still use gevent for flask with  the nginx\/uWSGI with the gevent loop \n3) uWSGI supports asyncio\n4) flask support for asyncio does not seem to be widely supported\n5) I refuse to use Django ...so dont event go there.. :)\nSo my question is that if I want to embrace asyncio with 3.6 is it bye-bye Flask in favor of e.g. aiohttp or sanic?\nOn other words...those that build async api's for python 2.7 how did you transition to 3.6 while maintaining non blocking calls?\nIt appears that I can still use gevent with flask with python 3 but this is a monkey patch to force async non blocking calls whereas asyncio is native and part of the STL...\nThanks","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":840,"Q_Id":45136647,"Users Score":0,"Answer":"It's better to go with asyncio preferably aiohttp which is more mainstream.","Q_Score":0,"Tags":"python,python-3.x,flask,python-asyncio,gevent","A_Id":45175533,"CreationDate":"2017-07-17T05:38:00.000","Title":"New to python 3.6 from 2.7 - is flask still relevant for async calls with gevent?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I am going to 3.6 now....\n1) I see for my worker servers ...in 2.7 I used gevent with great success for running one worker per core with N gevent threads per core...\n2) For my web dev..for low level..close to CGI as possible I used bottle with nginx\/uWSGI with the gevent loop\n3) For api's I used Flask with nginx\/uWSGI with the gevent loop\nMy api apps are screaming fast...and faster then nodejs for async calls to my backend databases...\nEnter 3.6 ... I am confused....\n1) It appears I can run my workers using asyncio since not dependent on a framework...so here I am OK\n2) It appears that gevent is available for 3.6 and I assume I can still use gevent for flask with  the nginx\/uWSGI with the gevent loop \n3) uWSGI supports asyncio\n4) flask support for asyncio does not seem to be widely supported\n5) I refuse to use Django ...so dont event go there.. :)\nSo my question is that if I want to embrace asyncio with 3.6 is it bye-bye Flask in favor of e.g. aiohttp or sanic?\nOn other words...those that build async api's for python 2.7 how did you transition to 3.6 while maintaining non blocking calls?\nIt appears that I can still use gevent with flask with python 3 but this is a monkey patch to force async non blocking calls whereas asyncio is native and part of the STL...\nThanks","AnswerCount":2,"Available Count":2,"Score":0.1973753202,"is_accepted":false,"ViewCount":840,"Q_Id":45136647,"Users Score":2,"Answer":"Flask + gevent works like a charm for python 3.6. There is no any close solution to Flask-Admin and other robust time-tested libraries (like SQLAlchemy). For real applications I can get the same amount of rps from a flask as for aiohttp or sanic or whatever.","Q_Score":0,"Tags":"python,python-3.x,flask,python-asyncio,gevent","A_Id":45570572,"CreationDate":"2017-07-17T05:38:00.000","Title":"New to python 3.6 from 2.7 - is flask still relevant for async calls with gevent?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"Can anyone let me know how to set PYTHONPATH?\nDo we need to set it in the environment variables (is it system specific) or we can independently set the PYTHONPATH and use it to run any independent python application? \ni need to pick the module from a package available in directory which is different from the directory from which I am running my application . How to include these packages in my application","AnswerCount":2,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":371,"Q_Id":45144525,"Users Score":1,"Answer":"I assume you are using Linux\nBefore executing your application u can metion pythonpath=path && execution script\nOther elegant way is using virtualenv. Where u can have diff packages for each application.\nBefore exection say workon env and then deactivate \nPython3 has virtualenv by default","Q_Score":0,"Tags":"python,python-3.x,pythonpath","A_Id":45145568,"CreationDate":"2017-07-17T12:37:00.000","Title":"how to use PYTHONPATH for independent python application","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"When I try to create a Windows AppX with Advanced Installer at the digital signing stage the program stops saying \"The application calls the SetDllDirectory function which is currently not supported by windows UWP applications. A digitally unsigned exe or msi installer works perfectly but the AppX, as not digitally signed, does not run! Is there a work around to this problem? I searched the Pyinstaller docs and also asked a question on the Pyinstaller Google groups. They did not even list my question.","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":89,"Q_Id":45150223,"Users Score":1,"Answer":"according to Microsoft the SetDllDirectory function which is used by Pyinstaller is currently no supported by UWP and according to Pyinstaller experts there is no provision to change this in the near future. So right now this is not the way to go. If there is anyone who knows something better now is the time to speak up..","Q_Score":2,"Tags":"python-2.7,pyinstaller,advanced-installer","A_Id":45391696,"CreationDate":"2017-07-17T17:25:00.000","Title":"Digital signing halts with the error \"SetDllDirectory function in Pyinstaller is not currently supported by Windows UWP applications\"","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm using a queue trigger to pass in some data about a job that I want to run with Azure Functions(I'm using python). Part of the data is the name of a file that I want to pull from blob storage. Because of this, declaring a file path\/name in an input binding doesn't seem like the right direction, since the function won't have the file name until it gets the queue trigger. \nOne approach I've tried is to use the azure-storage sdk, but I'm unsure of how to handle authentication from within the Azure Function.\nIs there another way to approach this?","AnswerCount":3,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":1135,"Q_Id":45155616,"Users Score":0,"Answer":"Storing secrets can (also) be done using App Settings.\nIn Azure, go to your Azure Functions App Service, Then click \"Application Settings\". Then, scroll down to the \"App Settings\" list. This list consists of Key-Value pairs. Add your key, for example MY_CON_STR and the actual connection string as the value.\nDon't forget to click save at this point\nNow, in your application (your Function for this example), you can load the stored value using its key. For example, in python, you can use:\nos.environ['MY_CON_STR']\nNote that since the setting isn't saved locally, you have to execute it from within Azure. Unfortunately, Azure Functions applications do not contain a web.config file.","Q_Score":2,"Tags":"python,azure,azure-blob-storage,azure-functions","A_Id":45165615,"CreationDate":"2017-07-18T00:30:00.000","Title":"Access Blob storage without binding?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Python 3.5.2 is installed, and I need to ensure it doesn't upgrade to 3.6 due to some other dependencies.\nWhen I install OpenCV 3 via brew (see below), brew invokes python3 and upgrades to Python 3.6, the latest build:\nbrew install opencv3 --with-python3\nHow can I install OpenCV 3 without changing my Python build?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":150,"Q_Id":45156570,"Users Score":0,"Answer":"Try using pip, \nYou can create a pip-reqs.txt file and pin things to a specific version\nThen just run \n\npip -r pip-reqs.txt\n\npip will then take care of installing opencv for you for the python version that is currently configured","Q_Score":0,"Tags":"python,opencv3.0","A_Id":45159452,"CreationDate":"2017-07-18T02:37:00.000","Title":"Install OpenCV 3 Without Upgrading Python","Data Science and Machine Learning":1,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am coding Python3 in Vim and would like to enable autocompletion.\nI must use different computers without internet access. Every computer is running Linux with Vim preinstalled.\nI dont want to have something to install, I just want the simplest way to enable python3 completion (even if it is not the best completion), just something easy to enable from scratch on a new Linux computer.\nMany thanks","AnswerCount":3,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":2519,"Q_Id":45168222,"Users Score":0,"Answer":"by default, Ctrl-P in insert mode do an autocompletion with all the words already present in the file you're editing","Q_Score":4,"Tags":"python,linux,vim","A_Id":45168297,"CreationDate":"2017-07-18T13:29:00.000","Title":"Enable python autocompletion in Vim without any install","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a project for which I want to create a tar.gz with python setup.py install. \nProblem is, I only get egg files in my dist\/ folder when running python setup.py install. I need the project.tar.gz file so that I can easily make it installable from conda.\nHow do I make python setup.py install create a tar.gz (I do not need any egg files, really).\nWhat I ultimately want is a tar.gz archive showing on pypi with a download link and md5, which I used to get before the PYPI update.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":6897,"Q_Id":45168408,"Users Score":12,"Answer":"python setup.py sdist creates .tar.gz source archive and doesn't create eggs. That's probably what you want instad of python setup.py install.","Q_Score":5,"Tags":"python,pypi","A_Id":45175607,"CreationDate":"2017-07-18T13:36:00.000","Title":"Creating tar.gz in dist folder with python setup.py install","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I need to store json objects on the google cloud platform.  I have considered a number of options:\n\nStore them in a bucket as a text (.json) file.\nStore them as text in datastore using json.dumps(obj).\nUnpack it into a hierarchy of objects in datastore.\n\nOption 1: Rejected because it has no organising principles other than the filename and cannot be searched across.\nOption 2: Is easy to implement, but you cannot search using dql.\nOption 3: Got it to work after a lot of wrangling with the key and parent key structures.  While it is searchable, the resulting objects have been split up and held together by the parent key relationships.  It is really ugly!\nIs there any way to store and search across a deeply structured json object on the google cloud platform - other than to set up mongodb in a compute instance?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":1421,"Q_Id":45184482,"Users Score":0,"Answer":"I don't know what your exact searching needs are, but the datastore API allows for querying that is decently good, provided you give the datastore the correct indexes. Plus it's very easy to go take the entities in the datastore and pull them back out as .json files.","Q_Score":1,"Tags":"json,python-2.7,google-app-engine,google-cloud-datastore","A_Id":45204510,"CreationDate":"2017-07-19T08:05:00.000","Title":"Storing json objects in google datastore","Data Science and Machine Learning":0,"Database and SQL":1,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":1},{"Question":"What will be the effect if I use the same python virtualenv in different OS system?\n\nIf not possible, why?\n\nIts said that what can confirm if the virtualenv can used in the os system?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":48,"Q_Id":45208088,"Users Score":0,"Answer":"the purpose of virtualenv is to separate your python environment, so one virtualenv may have, let's say Django version 1.11 with Python 3, while another virtualenv have django 1.10 with python 2.7 , Using the same python virtualenv in different OS system is doable, pip inside the virtualenv will handle the libraries while the python will handle OS differences when you install python 2.7 or python 3.0 inside the virtualenv.\nOne of the example use of these two virtualenv is let's say your Nginx Server is using different python environment for each domain (one nginx server can handle many domains).","Q_Score":0,"Tags":"python,virtualenv","A_Id":45208247,"CreationDate":"2017-07-20T07:26:00.000","Title":"What will be the effect if I use the same python virtualenv in different OS system","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Inside a TFS Project, I store some set of python scripts inside a specific folder. So I want to trigger a Jenkins build if a change is made on scripts on the particular folder and not others. Is there anyway to do this ?","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":683,"Q_Id":45246185,"Users Score":0,"Answer":"You could create a Jenkins job that checks the modified time (If the scripts are under version control, the commit id) periodically, and if there's a change since the last build, kick off the new build.","Q_Score":0,"Tags":"python,jenkins,tfs","A_Id":45246242,"CreationDate":"2017-07-21T20:25:00.000","Title":"Trigger a Jenkins build when a checkin is made on TFS","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Inside a TFS Project, I store some set of python scripts inside a specific folder. So I want to trigger a Jenkins build if a change is made on scripts on the particular folder and not others. Is there anyway to do this ?","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":683,"Q_Id":45246185,"Users Score":0,"Answer":"You can use Jenkins service hook in TFS:\n\nGo to team project admin page\nSelect Service Hooks\nClick + to add a new service\nSelect Jenkins> Next\nSelect Code checked in event and specify filter path >Next\nSpecify Jenkins base URL, User name, Password, Build job etc\u2026> Finish\n\nAfter that, it will trigger a Jenkins build when a checkin is made on specified path.","Q_Score":0,"Tags":"python,jenkins,tfs","A_Id":45294907,"CreationDate":"2017-07-21T20:25:00.000","Title":"Trigger a Jenkins build when a checkin is made on TFS","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Sorry, I don't really have much technical background and I know it sounds like a confused question. However, I will try my best to explain what I want to do in here.\nMy daily routine tasks involved lots of digital marketing data (very large data >20GB+) from different types of platform. As you can see, when I try to analyze these data, I need to aggregate these data into a similar format. The tedious part of my job is it normally involved lots of manual downloads, lots of data cleansing, and lots of upload(I upload the cleaned data to Google Cloud Storage so I can use BigQuery!).\nI feel do these tasks manually are extremely inefficient, and I think the only logical choice is automate these tasks on Google Cloud Platform.\nAfter months of effort, I am managed to do these tasks in semi-auto fashion, which I wrote some python programs and make a schtask batch for following:\n\nDownload (A python program makes API calls to download platform data to my local drive)\nCleansing (A python program cleansing these data locally) \nUpload to Cloud Storage (A python program upload \"cleaned\" data using gsutil)\n\nAlthough, it saved lots of my time, but everything is still done locally on my desktop PC.\nHere are my real questions, I am sure there is a way to manage all these tasks (download, cleansing, upload) in Google Cloud without touching my local PC, where should I start?\n\nHow can I run these Python program on Google Cloud? I know that I can deploy these Python programs in App Engine, however, to allow these program to do their jobs, do I also need a compute engine? or simple deployment would do the job?\nHow do I schtask for these apps on Google Cloud?\nI know Cloud Storage is only one of many ways to store the data on GCP, since I have these data from different types of platform, and they are all in different formats and metrics. So what would be the best way to store these data efficiently on Google Cloud? CloudSQL, Datastore or BigTable?\n\nThanks!","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":118,"Q_Id":45254244,"Users Score":1,"Answer":"We need more information and see some code to be able to help you better but in general the work you describe should be able to get done via http and you don't need any special C libraries, hence you could go with appengine and create task queues for your jobs. \nBe prepared that using only appengine can be trickier than having an operating system that you can leverage. There is no operating system with appengine once you've deployed, you must use only the functionality supplied in appengine. \nBut yes, as far as I can tell from the information you provide, an appengine app should be able to do the work you describe. Try writing some code, deploy the appengine app and get back here and ask if you have specific trouble. \nYou can always add compute engine to your appengine project if you need it later.","Q_Score":2,"Tags":"python,google-app-engine,google-cloud-datastore,google-cloud-platform,google-cloud-storage","A_Id":45258584,"CreationDate":"2017-07-22T11:53:00.000","Title":"Google Cloud: Do we need a compute engine to run a deployed python code?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I need to update the latest version of the appium, alas, in the Russian forums there is not much information for it. I have a 1.1.0 beta","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":83,"Q_Id":45264225,"Users Score":0,"Answer":"If you are using the appium command line tool,then you can update to the desired version by using below mentioned command:\nnpm update -g appium\nIf you want to install version 1.6.3 :\nCommand : npm install appium  1.6.3\nAlso,if you want to update through appium UI,then you can update by clicking on 'Check for Updates' button available under 'File' menu.","Q_Score":0,"Tags":"android,appium,python-appium","A_Id":45297308,"CreationDate":"2017-07-23T10:49:00.000","Title":"How to update appium 1.1.0 beta","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm developing with Apache and Django an web application application where users interacts with a data model (C++ implementation wrapped into Python). \nTo avoid load \/ save data in a file or database after each user operation, I prefer keep data model in memory as long as the user is connected to the app. \nUntil now, data models are stored into a variable attached to web service. As Python running under Apache has sometimes strange behavior, I'd prefer execute user operation into separated python process, today on same server, maybe tomorrow on a different node. \nI'm under the impression that Distributed computing library (dispy, dask distributed) does not enable to keep memory attached to a node. Does anyone have a solution \/ idea about what libraries could I use ?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":65,"Q_Id":45277365,"Users Score":0,"Answer":"Simple answer : stop wasting your time trying to do complicated things that will never work right with your typical web server and store your data in a database (doesn't have to be a mysql database FWIW). \nLongest answer: in a production environment you typically have several parallel (sub)processes handling incoming requests, and any of those process can serve any user at any time, so keeping your data in memory in a process will never work reliably. This is by design and this is a sane design, so trying to fight against it is just a waste of time and energy. Web server processes are not meant to persist data before requests, that's what your database is for, so use it.","Q_Score":0,"Tags":"python,django,apache,dispy,dask-distributed","A_Id":45279560,"CreationDate":"2017-07-24T09:50:00.000","Title":"Node process with dedicated memory in Python","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"We are using Airflow as a scheduler. I want to invoke a simple bash operator in a DAG. The bash script needs a password as an argument to do further processing.\nHow can I store a password securely in Airflow (config\/variables\/connection) and access it in dag definition file?\nI am new to Airflow and Python so a code snippet will be appreciated.","AnswerCount":8,"Available Count":1,"Score":0.049958375,"is_accepted":false,"ViewCount":49127,"Q_Id":45280650,"Users Score":2,"Answer":"In this case I would use a PythonOperator from which you are able to get a Hook on your database connection using\nhook = PostgresHook(postgres_conn_id=postgres_conn_id). You can then call get_connection on this hook which will give you a Connection object from which you can get the host, login and password for your database connection. \nFinally, use for example subprocess.call(your_script.sh, connection_string) passing the connection details as a parameter.\nThis method is a bit convoluted but it does allow you to keep the encryption for database connections in Airflow. Also, you should be able to pull this strategy into a separate Operator class inheriting the base behaviour from PythonOperator but adding the logic for getting the hook and calling the bash script.","Q_Score":37,"Tags":"python,airflow","A_Id":45298761,"CreationDate":"2017-07-24T12:27:00.000","Title":"Store and access password using Apache airflow","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Using MacPorts to try and install OLA for work. Came across this error when trying to build OLA after getting it from github:\n\nchecking for python module: google.protobuf... no\nconfigure: error: failed to find required module google.protobuf\n\nTried googling around to see if there was a solution, didn't find one. Like the title implies, I'm on a Macbook Air running Sierra, Python version is 2.7.10.","AnswerCount":2,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":593,"Q_Id":45288631,"Users Score":2,"Answer":"MacPorts has a port for OLA.  Installing it will automatically install the required protobuf module.\nCommand is sudo port install ola\nOr is there some reason that you need to install a version from GitHub?","Q_Score":0,"Tags":"python,protocol-buffers,macports","A_Id":45290029,"CreationDate":"2017-07-24T19:31:00.000","Title":"macOS 10.12; Configure: error: failed to find required module google.protobuf","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"How do you run a python script from inside DXL\/DOORS? I attempted using the system() command but only gotten errors.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":1617,"Q_Id":45290682,"Users Score":0,"Answer":"I would recommend trying your command string C:\\\\myPython.exe H:\\\\myscript.py in the command line first, seeing if that works. If it does then it could be a permissions error (can't tell unless you have an error code to go with the CreateProcess error, as there are several types). \nIt might then be worth checking you can run any kind of command in the command line from DOORs (system(\"notepad\") should do the trick)\nIf that doesn't work running DOORS as an admin may fix your issue, you can do this by going to the doors.exe right-clicking Properties -> Compatibility and selecting \"Run this program as an administrator\".","Q_Score":0,"Tags":"python,ibm-doors","A_Id":45373289,"CreationDate":"2017-07-24T21:53:00.000","Title":"Running Python Script from inside DXL\/DOORS","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"None of the current error inquiries addressed my specific situation (it seems like a pretty well rounded problem). I am trying to install Pillow (image module for Python). I have the correct version of the whl file, and the correct installation of Python 3.6. My paths have been confirmed. \nSteps that I took:\n\nDownloaded the whl file  \nOpened downloads in command window  \nTyped the pip path, install, and then my whl file.\n\nThen I got the error: \"Fatal error in launcher: Unable to create process using\"","AnswerCount":1,"Available Count":1,"Score":0.6640367703,"is_accepted":false,"ViewCount":4784,"Q_Id":45290798,"Users Score":4,"Answer":"use 'python -m puse 'python -m pip install package-name' instead.","Q_Score":2,"Tags":"python,module,directory,pip,command-prompt","A_Id":45666971,"CreationDate":"2017-07-24T22:02:00.000","Title":"What does \"Fatal error in launcher: Unable to create process using\" mean?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"There are mainly two questions that I would like to ask, thanks in advance.\n(1) How can I open an external program in Linux?\nI know in Windows there is a command os.startfile() to open another program, the equivalent for Ubuntu is open(), but there's no response after I run the code,  and the alternative one is subprocess.call(). This works well in Windows, but in Ubuntu it fails, could someone provide a standard templete I can use for? (Similarly like to double click the icon of a program)\n(2) How can I realize functions like the code is able to open the terminal and write down several commands in terminal automatically using python?","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":3833,"Q_Id":45318019,"Users Score":0,"Answer":"os.system can do this work. for example, you want to run 'ls' under a shell. want_run='ls';os.system('bash -c '+ want_run);","Q_Score":1,"Tags":"linux,python-2.7,ubuntu","A_Id":45318450,"CreationDate":"2017-07-26T05:18:00.000","Title":"How can I open an external program using Python in Ubuntu?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am currently trying to figure out how to set up using python 3 on my machine (Windows 10 pro 64-bit), but I keep getting stuck.\nI used the Python 3.6 downloader to install python, but whenever I try to use Command Prompt it keeps saying \"'python' is not recognized as an internal or external command, operable program or batch file\" as if I have not yet installed it.\nUnlike answers to previous questions, I have already added \";C:\\Python36\" to my Path environment variable, so what am I doing wrong? \nI am relatively new to python, but know how to use it on my Mac, so please let me know if I'm just fundamentally confused about something.","AnswerCount":3,"Available Count":3,"Score":0.0665680765,"is_accepted":false,"ViewCount":262,"Q_Id":45335812,"Users Score":1,"Answer":"In environmental variables under path, add your python path... you said you already so please ensure is their comma separation between previous path..\nAnd once added save environment variables tab.  And close all command prompt then open it.  \nThen only command prompt will refresh with your python config..\nMain thing,  if you enter python which mean python 2.  \nFor python3 type, python3 then it should work","Q_Score":0,"Tags":"python","A_Id":45335902,"CreationDate":"2017-07-26T19:26:00.000","Title":"Downloading python 3 on windows","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am currently trying to figure out how to set up using python 3 on my machine (Windows 10 pro 64-bit), but I keep getting stuck.\nI used the Python 3.6 downloader to install python, but whenever I try to use Command Prompt it keeps saying \"'python' is not recognized as an internal or external command, operable program or batch file\" as if I have not yet installed it.\nUnlike answers to previous questions, I have already added \";C:\\Python36\" to my Path environment variable, so what am I doing wrong? \nI am relatively new to python, but know how to use it on my Mac, so please let me know if I'm just fundamentally confused about something.","AnswerCount":3,"Available Count":3,"Score":0.0,"is_accepted":false,"ViewCount":262,"Q_Id":45335812,"Users Score":0,"Answer":"Thanks everyone, I ended up uninstalling and then re-downloading python, and selecting the button that says \"add to environment variables.\" Previously, I typed the addition to Path myself, so I thought it might make a difference if I included it in the installation process instead. Then, I completely restarted my computer rather than just Command Prompt itself. I'm not sure which of these two things did it, but it works now!","Q_Score":0,"Tags":"python","A_Id":45361096,"CreationDate":"2017-07-26T19:26:00.000","Title":"Downloading python 3 on windows","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am currently trying to figure out how to set up using python 3 on my machine (Windows 10 pro 64-bit), but I keep getting stuck.\nI used the Python 3.6 downloader to install python, but whenever I try to use Command Prompt it keeps saying \"'python' is not recognized as an internal or external command, operable program or batch file\" as if I have not yet installed it.\nUnlike answers to previous questions, I have already added \";C:\\Python36\" to my Path environment variable, so what am I doing wrong? \nI am relatively new to python, but know how to use it on my Mac, so please let me know if I'm just fundamentally confused about something.","AnswerCount":3,"Available Count":3,"Score":0.0,"is_accepted":false,"ViewCount":262,"Q_Id":45335812,"Users Score":0,"Answer":"Why are you using command prompt? I just use the python shell that comes with IDLE. It\u2019s much simpler.\nIf you have to use command prompt for some reason, you\u2019re problem is probably that you need to type in python3. Plain python is what you use for using Python 2 in the command prompt.","Q_Score":0,"Tags":"python","A_Id":45338244,"CreationDate":"2017-07-26T19:26:00.000","Title":"Downloading python 3 on windows","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a subprocess in Python that I kick off that produces a log file. I need another subprocess to tail this log file as it is being generated and obtain the results at the end of my first subprocess (the thing that generates the log file).\nThis needs to be achieved on Windows boxes so I cannot use tail. I have looked into Get-Contents but am not entirely sure whether I can make Get-Contents persist and return only when my first subprocess (the log generator) finishes execution.\nHow would I achieve this?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":307,"Q_Id":45376218,"Users Score":0,"Answer":"I'm not sure but i think you can use tail -f filename even with a log file inside a windows batch","Q_Score":0,"Tags":"python,windows,powershell,logging,cmd","A_Id":45376375,"CreationDate":"2017-07-28T14:37:00.000","Title":"Tail a log file as subprocess in Python [Windows box]","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I've used successfully subprocess.check_output to call plenty of windows programs.\nYet, I'm troubled at calling icacls. \nBy cmd, this works:\ncmd>icacls \"C:\\my folder\" \/GRANT *S-1-1-0:F\nI've tried:\nsubprocess.check_output(['C:\\\\Windows\\\\System32\\\\icacls.exe','\"C:\\\\my folder\"','\/GRANT *S-1-1-0:F'],shell=True,stderr=subprocess.STDOUT)\nbut return code is 123 (according to micrsoft, invalid file name).\nI've also tried (which also works from cmd)\nsubprocess.check_output(['C:\\\\Windows\\\\System32\\\\icacls.exe','\"C:\/my folder\"','\/GRANT *S-1-1-0:F'],shell=True,stderr=subprocess.STDOUT)\nbut return code is also 123.\nAny idea?","AnswerCount":3,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":1557,"Q_Id":45421302,"Users Score":0,"Answer":"@Jean-Fran\u00e7ois Fabre gave me the clue:\nQuoting my target argument made sense, since it has blanks and, so, quoting is required when calling from cmd. However, it seems python will over-quote.\nThank you all guys for your help!!!","Q_Score":1,"Tags":"python,windows,cmd,icacls","A_Id":45433548,"CreationDate":"2017-07-31T16:46:00.000","Title":"calling windows' icacls from python","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I can not install the Python package Gurobipy. I get the following output when I try it:\n\nrunning install\nrunning build running build_py running install_lib running\ninstall_egg_info Removing\n\/usr\/local\/lib\/python2.7\/dist-packages\/gurobipy-7.5.1.egg-info Writing\n\/usr\/local\/lib\/python2.7\/dist-packages\/gurobipy-7.5.1.egg-info\nremoving 'build\/lib.linux-x86_64-2.7' (and everything under it)\n'build\/bdist.linux-x86_64' does not exist -- can't clean it\n'build\/scripts-2.7' does not exist -- can't clean it removing 'build'\n\nI run Ubuntu 16.04, Python 2.7, and Gurobi 7.5.1. gurobi.sh is working fine...","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":1240,"Q_Id":45437617,"Users Score":0,"Answer":"You can test gurobipy via the command from gurobipy import *. If that gives no error, then the installation worked, and you can ignore the messages from running setup.py.","Q_Score":0,"Tags":"python,linux,ubuntu,gurobi","A_Id":45439246,"CreationDate":"2017-08-01T12:19:00.000","Title":"Install gruobipy package - error","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"My Python program uses the terminal(system) command to perform the task on the file and script. I am going to convert this Python program into Mac OS application and Linux application using pyinstaller. I am going to pass the application installer file to my friends. However, I have following questions.\nIf script or file doesn't have proper permission which my program is trying to access, will Python get an error?\nRunning some script or opening file will require the permission of root. So is there a possible option that will prompt the user for root(admin) password or run my application with root privilege?\nThanks","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":1860,"Q_Id":45453243,"Users Score":1,"Answer":"Try chmod 777 filname.py, this will give the file all rights for execution and editing. There are also other modes for chmod like 755, which will also work for your case.","Q_Score":0,"Tags":"python,linux,macos,root,file-permissions","A_Id":45453549,"CreationDate":"2017-08-02T06:38:00.000","Title":"Python application permission denied","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Newbie to linux, I thought that apt-get purge is usually used to remove a pkg totally, but today it neally crash my whold system. I want to remove a previously installed python 3.4 distribution, but I'm not sure which pkg it belongs, so I used find \/usr -type f -name \"python3.4\" to find it, the command returns several lines, the first one is \/usr\/bin\/python3.4, so then I typed dpkg -S \/usr\/bin\/python3.4 to determine which pkg python3.4 belongs, it returns python-minimal, so I typed sudo apt-get purge python-minimal, but then a lot of pkgs was removed, also some installed, I'm totally confused, and I saw even the app store disappeared, a lot of the system was removed... Can someone help me?","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":3227,"Q_Id":45473744,"Users Score":3,"Answer":"When you run apt purge <package> or apt remove <package> you are not only instructing apt to remove the named package, but any other package that depends on it. Of course apt doesn't perform that unexpected operation without first asking for your consent, so I imagine it showed the list of packages that it was going to remove, and when you pressed Y it removed all of them.\nSo, to undo the mess, if you still have the window where you run the purge then check which packages it told you it was going to remove, and manually apt install them. If you don't have the list around, then you need to manually install every package that is not working properly.\nIf it is the window manager that got damaged, try apt-get install ubuntu-gnome-desktop or the appropriate package for your distribution\/window manager.\nRule of thumb when deleting\/updating packages: always read the list of packages affected, sometimes there is unexpected stuff.","Q_Score":0,"Tags":"python,linux","A_Id":45473958,"CreationDate":"2017-08-03T02:18:00.000","Title":"What did apt-get purge do?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I would like a python GUI to have an OCaml process in the background. I would like to keep a single session throughout the program's lifetime, and depending on user inputs, call some OCaml commands and retrieve OCaml's output. Some OCaml variables and structures may be defined along the way so I would like to maintain a single ongoing session.\nMy solution was to hold an OCaml toplevel process using popen and interact with its stdin and stdout. This works purely for me for several reasons:\n1. I don't know when is the OCaml calculation done and can't tell if it's output is complete or there is more to come (especially so if the evaluation takes some time, and if multiple OCaml commands were invoked).\n2. I have no inherent way of telling whether the OCaml command ran smoothly or maybe there were OCaml warnings or errors.\n3. I lose the structure of OCaml's output. For example, if the output spreads over several lines, I can't tell which lines were broken due to line size, and which were originally separate lines. \nI know there are some discussions and some packages for combining python with OCaml, but they all run python commands from OCaml, and I need the opposite.","AnswerCount":3,"Available Count":1,"Score":0.0665680765,"is_accepted":false,"ViewCount":345,"Q_Id":45479510,"Users Score":1,"Answer":"As a complementary remark, it is perfectly possible to run a separated toplevel process and send to it input phrases and read the corresponding output. The trick to detect the end of a toplevel output is to add a guard phrase after every input phrase: rather than sending just f ();; to the toplevel process, one can send f ();; \"end_of_input\";; and then watch for the toplevel output corresponding to \"end_of_input\";; (aka - : string = \"end_of_input\"). My experience is that errors and warnings are generally quite easy to detect or parse from the toplevel output; so the only missing point is the formatting of the code.","Q_Score":3,"Tags":"python,ocaml,integration","A_Id":45495926,"CreationDate":"2017-08-03T08:59:00.000","Title":"Integrating OCaml in python - How to hold an ocaml session from python?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"When I try to execute Jupyter Kernel Gateway on Docker, I get the below error:\n2017-08-03T11:00:51.732015249Z [KernelGatewayApp] Kernel shutdown: 27351426-2078-4101-b3f3-86da41d6e141\n2017-08-03T11:00:51.735665285Z Traceback (most recent call last):\n2017-08-03T11:00:51.735690921Z   File \"\/opt\/conda\/bin\/jupyter-kernelgateway\", line 11, in \n2017-08-03T11:00:51.735699387Z     sys.exit(launch_instance())\n2017-08-03T11:00:51.735705691Z   File \"\/opt\/conda\/lib\/python3.4\/site-packages\/jupyter_core\/application.py\", line 267, in launch_instance\n2017-08-03T11:00:51.735711902Z     return super(JupyterApp, cls).launch_instance(argv=argv, **kwargs)\n2017-08-03T11:00:51.735717618Z   File \"\/opt\/conda\/lib\/python3.4\/site-packages\/traitlets\/config\/application.py\", line 591, in launch_instance\n2017-08-03T11:00:51.735723686Z     app.initialize(argv)\n2017-08-03T11:00:51.735731330Z   File \"\/opt\/conda\/lib\/python3.4\/site-packages\/kernel_gateway\/gatewayapp.py\", line 212, in initialize\n2017-08-03T11:00:51.735737468Z     self.init_configurables()\n2017-08-03T11:00:51.735742836Z   File \"\/opt\/conda\/lib\/python3.4\/site-packages\/kernel_gateway\/gatewayapp.py\", line 241, in init_configurables\n2017-08-03T11:00:51.735748923Z     self.kernel_pool = KernelPool(self.prespawn_count, self.kernel_manager)\n2017-08-03T11:00:51.735755996Z   File \"\/opt\/conda\/lib\/python3.4\/site-packages\/kernel_gateway\/services\/kernels\/pool.py\", line 27, in init\n2017-08-03T11:00:51.735762895Z     kernel_id = kernel_manager.start_kernel(kernel_name=self.kernel_manager.parent.seed_notebook['metadata']['kernelspec']['name'])\n2017-08-03T11:00:51.735772782Z   File \"\/opt\/conda\/lib\/python3.4\/site-packages\/kernel_gateway\/services\/kernels\/manager.py\", line 71, in start_kernel\n2017-08-03T11:00:51.735779471Z     raise RuntimeError('Error seeding kernel memory')\n2017-08-03T11:00:51.735785063Z RuntimeError: Error seeding kernel memory","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":398,"Q_Id":45482450,"Users Score":1,"Answer":"This error is due to compile errors in the respective notebook.\nTo try, I commented everything and just annotated a single cell with a GET request.\nIt worked!","Q_Score":1,"Tags":"python-3.x,docker,jupyter-notebook","A_Id":51353255,"CreationDate":"2017-08-03T11:07:00.000","Title":"RuntimeError in Jupyter Kernel Gateway on Docker","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have to SSH into 120 machines and make a dump of a table in databases and export this back on to my local machine every day, (same database structure for all 120 databases).\nThere isn't a field in the database that I can extract the name from to be able to identify which one it comes from, it's vital that it can be identified, as it's for data analysis.\nI'm using the Python tool Fabric to automate the process and export the CSV on to my machine..\n\nfab -u PAI -H 10.0.0.35,10.0.0.XX,10.0.0.0.XX,10.0.0.XX -z 1\n  cmdrun:\"cd \/usr\/local\/mysql\/bin && .\/mysql -u root -p -e 'SELECT *\n  FROM dfs_va2.artikel_trigger;' >\n  \/Users\/admin\/Documents\/dbdump\/dump.csv\"\n  download:\"\/Users\/johnc\/Documents\/Imports\/dump.csv\"\n\nAbove is what I've got working so far but clearly, they'll all be named \"dump.csv\" is there any awesome people out there can give me a good idea on how to approach this?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":62,"Q_Id":45508137,"Users Score":0,"Answer":"You can try to modify your command as follow:\n\nmysql -uroot -p{your_password} -e 'SELECT * FROM dfs_va2.artikel_trigger;' > \/Users\/admin\/Documents\/dbdump\/$(hostname)_dump.csv\" download:\"\/Users\/johnc\/Documents\/Imports\/$(hostname)_dump.csv\"\n\nhostname returns current machine name so all your files should be unique (of course if machines have unique names)\nAlso you don't need to navigate to \/bin\/mysql every time, you can use simply mysql or absolute path \/usr\/local\/mysql\/bin\/mysql","Q_Score":0,"Tags":"python,automation,fabric,devops","A_Id":45508534,"CreationDate":"2017-08-04T13:28:00.000","Title":"Best way to automate file names of multiple databases","Data Science and Machine Learning":0,"Database and SQL":1,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I've installed python via homebrew. It is located in:\n\/usr\/local\/Cellar\/python\/2.7.13_1\nwhich should be right.\nNow I am trying to use this python installation, but \"which python\" only shows the macOS python installation at \"\/usr\/bin\/python\". So i am checking the $PATH and I see that everything should be ok.\n\"echo $PATH\" results in this: \/usr\/local\/bin:\/usr\/bin:\/bin:\/usr\/sbin:\/sbin\nI restarted the terminal window and this occurs every time. I also did the\n\"brew doctor\" and no warnings appeared. \nWhat I am using:\nStandard macOS Terminal-App\nHas anybody a clue how this problem could be solved?","AnswerCount":3,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":434,"Q_Id":45530573,"Users Score":0,"Answer":"Update $PATH in your .bashrc file.\nExample add the following line in your .bashrc\nexport PATH=\/usr\/local\/Cellar\/python\/2.7.13_1\/bin:$PATH","Q_Score":2,"Tags":"python,macos,homebrew","A_Id":45530632,"CreationDate":"2017-08-06T09:25:00.000","Title":"Homebrew macOS - Python installation","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"How can I make a swi-prolog program that executes a Python file score.py and gets the output?\nI've read about process_create\/3 and exec\/1 but I can't find much documentation","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":403,"Q_Id":45533640,"Users Score":2,"Answer":"You need to use the stdout\/1 and stderr\/1 options of process_create\/3.\nFor example, here is a simple predicate that simply copies the process output to standard\u00a0output:\n\noutput_from_process(Exec, Args) :-\n        process_create(Exec, Args, [stdout(pipe(Stream)),\n                                    stderr(pipe(Stream))]),\n        copy_stream_data(Stream, current_output),\n        % the process may terminate with any exit code.\n        catch(close(Stream), error(process_error(_,exit(_)), _), true).\n\nYou can adapt the copy_stream_data\/2 call to write the output to any other stream.","Q_Score":4,"Tags":"python,prolog,swi-prolog","A_Id":45533749,"CreationDate":"2017-08-06T15:36:00.000","Title":"How to get output value from python script executed in swi-prolog","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Please any one can help how to install python or update with new version on centos 6.5.\ni am getting below error while installing through .tat.gz after running make command \nmake: *** No targets specified and no makefile found.  Stop.\nkindly any one can help ..\nRegards,\nSriram","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":98,"Q_Id":45559360,"Users Score":0,"Answer":"Make sure you have extracted the archive and are in the directory where the Makefile resides.","Q_Score":0,"Tags":"python,linux,python-2.7,redhat,centos6","A_Id":45559463,"CreationDate":"2017-08-08T04:34:00.000","Title":"Not able to install python new version 2.7.8 on centos","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to install Python 3.6.2 on a windows vps I have but I need admin rights to do it.\nI tried a various different methods but none of them worked.\nThere is no MSI version for python 3 so that does not work either.\nAny ideas?","AnswerCount":3,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":4368,"Q_Id":45585796,"Users Score":0,"Answer":"You could try the embeddable version (Really a zipped portable version), but I'm not sure about dependencies management (i.e. pip) and path variables and whatnot.","Q_Score":1,"Tags":"python","A_Id":45588633,"CreationDate":"2017-08-09T08:46:00.000","Title":"Install Python 3.6.2 on Windows without admin rights","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"My book states:\n\nEvery program that runs on your computer has a current working directory, or cwd. Any filenames or paths that do not begin with the root folder are assumed to be under the current working directory\n\nAs I am on OSX, my root folder is \/. When I type in os.getcwd() in my Python shell, I get \/Users\/apple\/Documents. Why am I getting the Documents folder in my cwd? Is it saying that Python is using Documents folder? Isn't there any path heading to Python that begins with \/ (the root folder)?  Also, does every program have a different cwd?","AnswerCount":5,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":16071,"Q_Id":45591428,"Users Score":0,"Answer":"os.getcwd() has nothing to do with OSX in particular. It simply returns the directory\/location of the source-file. If my source-file is on my desktop it would return C:\\Users\\Dave\\Desktop\\ or let say the source-file is saved on an external storage device it could return something like G:\\Programs\\. It is the same for both unix-based and Windows systems.","Q_Score":7,"Tags":"python,working-directory","A_Id":45591819,"CreationDate":"2017-08-09T13:00:00.000","Title":"What exactly is current working directory?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"My book states:\n\nEvery program that runs on your computer has a current working directory, or cwd. Any filenames or paths that do not begin with the root folder are assumed to be under the current working directory\n\nAs I am on OSX, my root folder is \/. When I type in os.getcwd() in my Python shell, I get \/Users\/apple\/Documents. Why am I getting the Documents folder in my cwd? Is it saying that Python is using Documents folder? Isn't there any path heading to Python that begins with \/ (the root folder)?  Also, does every program have a different cwd?","AnswerCount":5,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":16071,"Q_Id":45591428,"Users Score":0,"Answer":"Python is usually (except if you are working with virtual environments) accessible from any of your directory. You can check the variables in your path and Python should be available. So the directory you get when you ask Python is the one in which you started Python. Change directory in your shell before starting Python and you will see you will it.","Q_Score":7,"Tags":"python,working-directory","A_Id":45591529,"CreationDate":"2017-08-09T13:00:00.000","Title":"What exactly is current working directory?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have installed Git Bash, python 3.6 and Anaconda for the course which requires me to use Unix commands within Jupyter, such as !ls, !cat, !head etc.\nHowever, for each of these commands I get (e.g.):\n\n'ls' is not recognized as an internal or external command,\n  operable program or batch file.\n\nI am using Windows 10. What can I do to be able to proceed with the course? \nThanks!","AnswerCount":3,"Available Count":2,"Score":0.1325487884,"is_accepted":false,"ViewCount":6860,"Q_Id":45599187,"Users Score":2,"Answer":"If you are running Jupyter Notebook in Windows run conda install posix.\nIt worked for me.","Q_Score":6,"Tags":"python,windows,git,jupyter","A_Id":63553489,"CreationDate":"2017-08-09T19:31:00.000","Title":"Python - Unix commands not recognized in Jupyter","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have installed Git Bash, python 3.6 and Anaconda for the course which requires me to use Unix commands within Jupyter, such as !ls, !cat, !head etc.\nHowever, for each of these commands I get (e.g.):\n\n'ls' is not recognized as an internal or external command,\n  operable program or batch file.\n\nI am using Windows 10. What can I do to be able to proceed with the course? \nThanks!","AnswerCount":3,"Available Count":2,"Score":1.0,"is_accepted":false,"ViewCount":6860,"Q_Id":45599187,"Users Score":11,"Answer":"Please don't use !ls as mentioned in the course. \nUse %ls in the jupyter notebook and it works fine.\nHope it helps.","Q_Score":6,"Tags":"python,windows,git,jupyter","A_Id":45751003,"CreationDate":"2017-08-09T19:31:00.000","Title":"Python - Unix commands not recognized in Jupyter","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Imagine that I've written a celery task, and put the code to the server, however, when I want to send the task to the server, I need to reuse the code written before.\nSo my question is that are there any methods to seperate the code between server and client.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":222,"Q_Id":45608490,"Users Score":0,"Answer":"Try a web server like flask that forwards requests to the celery workers. Or try a server that reads from a queue (SQS, AMQP,...) and does the same.\nNo matter the solution you choose, you end up with 2 services: the celery worker itself and the \"server\" that calls the celery tasks. They both share the same code but are launched with different command lines.\nAlternately, if the task code is small enough, you could just import the git repository in your code and call it from there","Q_Score":1,"Tags":"python,celery","A_Id":45608632,"CreationDate":"2017-08-10T08:36:00.000","Title":"how to seperate celery code into server and client side?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I am new to Oozie. I have couple of questions on oozie job scheduling.\n\nCan we get a list of jobs which scheduled on ozzie server for everyday run using some programmatic approach? Considering there are multiple job scheduled to run everyday may be for next couple of months or year.\nHow to know programmatically that a scheduled job had failed to run at day end for reporting purpose?\nCan we do a ranking on oozie scheduled job on the basis of their execution time?\n\nThanks much for any help on this.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":170,"Q_Id":45633650,"Users Score":0,"Answer":"You can use the Cloudera Hue or Apache Ambari tools that will give you your all info about the Ozzie \nIf you are looking for more you can write you own program using some api expose by oozie.","Q_Score":0,"Tags":"python,hadoop,oozie,oozie-workflow","A_Id":45682834,"CreationDate":"2017-08-11T11:03:00.000","Title":"Apache Oozie workflows","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"As a sys admin I am trying to simulate a user on a virtual machine for testing log file monitoring.   \nThe simulated user will be automated to perform various tasks that should show up in bash history, \"ls\", \"cd\", \"touch\" etc. It is important that they show up in bash history because the bash history is logged. \nI have thought about writing directly to the bash history but would prefer to more accurately simulate a users behavior. The reason being that the bash history is not the only log file being watched and it would be better if logs for the same event remained synchronized.   \nDetails\nI am working on CentOS Linux release 7.3.1611\nPython 2.7.5 is installed \nI have already tried to use pexpect.run('ls') or pexpect.spawn('ls'), 'ls' does not show up in the bash history with either command.","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":1718,"Q_Id":45646104,"Users Score":0,"Answer":"The short answer appears to be no you cannot do this with pexpect. \nAuditd is a possible alternative for tracking user input, but I have not figured out how to get it to record commands such as 'ls' and 'cd' because they do not call the system execve() command. The best work around I have found is to use the script command which opens another interactive terminal where every command entered in the prompt is recorded. You can use the file the script command outputs to (by default is typescript) to log all user commands.","Q_Score":0,"Tags":"python,linux,bash,shell,pexpect","A_Id":45718528,"CreationDate":"2017-08-12T03:05:00.000","Title":"Is it possible to use pexpect to generate bash shell commands that will show up in bash history?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I ran pip install pyaudio in my terminal and got this error:\n\nCommand \"\/home\/oliver\/anaconda3\/bin\/python -u -c \"import setuptools,\n  tokenize;file='\/tmp\/pip-build-ub9alt7s\/pyaudio\/setup.py';f=getattr(tokenize, 'open', open)(file);code=f.read().replace('\\r\\n',\n  '\\n');f.close();exec(compile(code, file, 'exec'))\" install\n  --record \/tmp\/pip-e9_md34a-record\/install-record.txt --single-version-externally-managed --compile\" failed with error code 1 in \/tmp\/pip-build-ub9alt7s\/pyaudio\/\n\nSo I ran sudo apt-install python-pyaudio python3-pyaudio\nwhich seemed to work. \nThen in jupyter:\nimport pyaudio\nerror: \n\nModuleNotFoundError: No module named 'pyaudio'\n\nCan anyone help me work out this problem? I am not familiar with Ubuntu and it's commands paths etc as I've only been using it a few months.\nIf you need more information, let me know what, and how. Thanks","AnswerCount":3,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":5269,"Q_Id":45676247,"Users Score":0,"Answer":"Check in the documentation of pyaudio if it is compatible with your python version\nSome modules which are not compatible may be installed without issues, yet still won't work when trying to access them","Q_Score":1,"Tags":"python,python-3.x,pyaudio","A_Id":45676889,"CreationDate":"2017-08-14T13:57:00.000","Title":"ModuleNotFoundError: No module named 'pyaudio'","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I ran pip install pyaudio in my terminal and got this error:\n\nCommand \"\/home\/oliver\/anaconda3\/bin\/python -u -c \"import setuptools,\n  tokenize;file='\/tmp\/pip-build-ub9alt7s\/pyaudio\/setup.py';f=getattr(tokenize, 'open', open)(file);code=f.read().replace('\\r\\n',\n  '\\n');f.close();exec(compile(code, file, 'exec'))\" install\n  --record \/tmp\/pip-e9_md34a-record\/install-record.txt --single-version-externally-managed --compile\" failed with error code 1 in \/tmp\/pip-build-ub9alt7s\/pyaudio\/\n\nSo I ran sudo apt-install python-pyaudio python3-pyaudio\nwhich seemed to work. \nThen in jupyter:\nimport pyaudio\nerror: \n\nModuleNotFoundError: No module named 'pyaudio'\n\nCan anyone help me work out this problem? I am not familiar with Ubuntu and it's commands paths etc as I've only been using it a few months.\nIf you need more information, let me know what, and how. Thanks","AnswerCount":3,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":5269,"Q_Id":45676247,"Users Score":0,"Answer":"if you are using windows then these command on the terminal:\npip install pipwin\npipwin install pyaudio","Q_Score":1,"Tags":"python,python-3.x,pyaudio","A_Id":59344854,"CreationDate":"2017-08-14T13:57:00.000","Title":"ModuleNotFoundError: No module named 'pyaudio'","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Is there a way to execute a Python script, yet stay in the Python shell thereafter, so that variable values could be inspected and such?","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":184,"Q_Id":45676676,"Users Score":0,"Answer":"Metaphox nailed it:\n\nI think you are looking for python -i .\/file.py, where the -i flag\n  will enter interactive mode after executing the file. If you are\n  already in the console, then execfile. \u2013 Metaphox 2 mins ago\n\nBut I want to thank for the other suggestions as well, which go beyond the original question yet are useful!","Q_Score":0,"Tags":"python","A_Id":45677292,"CreationDate":"2017-08-14T14:20:00.000","Title":"Run Python console after script execution in same environment","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm trying to play with a security tool using scapy to spoof ASCII characters in a UDP checksum.  I can do it, but only when I hardcode the bytes in Hex notation.  But I can't convert the ASCII string word into binary notation.  This works to send the bytes of \"He\" (first two chars of \"Hello world\"):\nsr1(IP(dst=server)\/UDP(dport=53, chksum=0x4865)\/DNS(rd=1,qd=DNSQR(qname=query)),verbose=0)\nBut whenever I try to use a variable of test2 instead of 0x4865, the DNS packet is not transmitted over the network.  This should create binary for this ASCII:\ntest2 = bin(int(binascii.hexlify('He'),16))\nsr1(IP(dst=server)\/UDP(dport=53, chksum=test2)\/DNS(rd=1,qd=DNSQR(qname=query)),verbose=0)\nWhen I print test2 variable is shows correct binary notation representation.\nHow do I convert a string such as He so that is shows in the checksum notation accepted by scapy, of 0x4865 ??","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":179,"Q_Id":45677057,"Users Score":0,"Answer":"I was able to get this working by removing the bin().  This works:\ntest2 = int(binascii.hexlify('He'),16)","Q_Score":0,"Tags":"python,scapy","A_Id":45693049,"CreationDate":"2017-08-14T14:39:00.000","Title":"Spoofing bytes of a UDP checksum over network","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"While running odoo at the first time it shows ImportError: No module named openerp\n\nC:\\Python27\\python.exe E:\/workspaces\/odoo-10.0-20170812\/odoo.py -c\nE:\\workspaces\\odoo-10.0-20170812\\odoo.conf Traceback (most recent call\n  last):   \nFile \"E:\/workspaces\/odoo-10.0-20170812\/odoo.py\", line 160, in\n  \n      main()\n  File \"E:\/workspaces\/odoo-10.0-20170812\/odoo.py\", line 156, in main\nimport openerp\nImportError: No module named openerp\nProcess finished with exit code 1","AnswerCount":2,"Available Count":2,"Score":0.0996679946,"is_accepted":false,"ViewCount":2238,"Q_Id":45678932,"Users Score":1,"Answer":"Odoo 10 source code does not contain the .\/odoo.py file, it is probably from <=9.0, where the now odoo module was named openerp. You should've got the wrong source, or mixed up the two.","Q_Score":2,"Tags":"python,django,openerp","A_Id":45716439,"CreationDate":"2017-08-14T16:26:00.000","Title":"ImportError: No module named openerp","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"While running odoo at the first time it shows ImportError: No module named openerp\n\nC:\\Python27\\python.exe E:\/workspaces\/odoo-10.0-20170812\/odoo.py -c\nE:\\workspaces\\odoo-10.0-20170812\\odoo.conf Traceback (most recent call\n  last):   \nFile \"E:\/workspaces\/odoo-10.0-20170812\/odoo.py\", line 160, in\n  \n      main()\n  File \"E:\/workspaces\/odoo-10.0-20170812\/odoo.py\", line 156, in main\nimport openerp\nImportError: No module named openerp\nProcess finished with exit code 1","AnswerCount":2,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":2238,"Q_Id":45678932,"Users Score":4,"Answer":"import openerp won't work in Odoo 10 because openerp is replaced with odoo. Upto version 9 it was openerp but in 10 it changed.\nSo try:\nimport odoo instead of import openerp.\nOdoo 10 source code does not contain an import openerp anywhere, maybe you have downloaded from the wrong source.","Q_Score":2,"Tags":"python,django,openerp","A_Id":45686661,"CreationDate":"2017-08-14T16:26:00.000","Title":"ImportError: No module named openerp","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I am using python virtualenv to run robot framework in linux.\nMy doubt is about the system date for virtualenv, is it possible to change the date of virtualenv with out changing the OS level system date.","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":147,"Q_Id":45686418,"Users Score":1,"Answer":"No, you cannot change the date in a virtualenv separate from the system time. A virtualenv is nothing more than environment variables and symbolic links to some folders, it is not an isolated system.","Q_Score":1,"Tags":"python,virtualenv,robotframework","A_Id":45724271,"CreationDate":"2017-08-15T04:17:00.000","Title":"Python virtualenv date different from OS","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I want to find the command line arguments that my program was called with, i.e. sys.argv, but I want to do that before Python makes sys.argv available. This is because I'm running code in usercustomize.py which is imported by the site module, which is imported before Python populates sys.argv. (If you're curious, the reason I'm doing this is to start my debugger without changing my program code.)\nIs there any way to find the command line arguments without sys.argv?\nAlso: The solution needs to work for Python 2.6 :(","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":299,"Q_Id":45692841,"Users Score":0,"Answer":"Nope. Python uses such libraries as sys, os, and etc to get access to system variables and os functional. It can't do it with just core functions. So, in any case, you need to import sys.","Q_Score":7,"Tags":"python,python-2.6","A_Id":52295075,"CreationDate":"2017-08-15T12:28:00.000","Title":"Python: Find `sys.argv` before the `sys` module is loaded","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have been working through the initial tutorial and ran into a load of issues with my anaconda install using python 2.7. In the end it wouldn't launch the server.\nAnyway, I decided to change up on my machine to python3. That said, I am now getting strange results which are:\nIf I use the terminal command $python -m django --version I get the following:\n\"..\/Contents\/MacOS\/Python: No module named django\"\nIf I change to \"$python3 -m django --version\" terminal gives me back: \"1.11.4\"\nNow, when I am in the tutorial and starting again from the beginning I do the following: \"$django-admin startproject mysite\"\nThis seemed to work.\nHowever, when I tried: \"$python manage.py runserver\" I get the following:\nTraceback (most recent call last):\n  File \"manage.py\", line 17, in \n    \"Couldn't import Django. Are you sure it's installed and \"\nImportError: Couldn't import Django. Are you sure it's installed and available on your PYTHONPATH environment variable? Did you forget to activate a virtual environment?\nIf I change to include 3, so \"$python3 manage.py runserver\" all is well.\nMy question is do I need to always use python3 in every command now? I does not say that in the tutorial.\nMy Mac OSx has a native install of 2.7 which I believe is required by my machine for other apps dependency.\nAny help would be really appreciated! I am sure given I am new to python I am being a complete moron!","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":10200,"Q_Id":45700003,"Users Score":0,"Answer":"Yes. Python 3's binaries are installed with a suffix of \"3\", so python will launch a Python 2 interpreter and you need to run python3 to specifically use Python 3.","Q_Score":2,"Tags":"python,django,python-2.7,python-3.x","A_Id":45700170,"CreationDate":"2017-08-15T19:20:00.000","Title":"\"$python manage.py runserver\" not working. Only \"python3 manage.py runserver\"","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"As we all know; Apple ship OSX with Python, but it locks it away.\nThis force me and anyone else that use python, to install another version and start the painful process of installing with pip with 100 tricks and cheats.\nNow, I would like to understand how to do this right; and sorry but I can't go with the route of the virtualenv, due to the fact that I run this for a build server running Jenkins, and I have no idea how to set that up correctly.\nCould you please clarify for me these?\n\nHow do you tell OSX to run the python from brew, instead than system one?\nWhere is the official python living, and where are the packages installed, when I run pip install with and without the -U and\/or the --user option?\nIn which order should I install a bunch of packages starting from scratch.on a fresh OSX machine,so I can set it up reliably every time?\n\nMostly I use opencv, scikit-image, numpy, scipy and pillow. These are giving me so many issues and I can't get a reliable setup so that Jenkins is happy to run the python code, using these libraries.","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":37,"Q_Id":45726623,"Users Score":0,"Answer":"Brew installs packages into \/usr\/local\/Cellar and then links them to \/usr\/local\/bin (i.e. \/usr\/local\/bin\/python3). In my case, I just make sure to have \/usr\/local\/bin in my PATH prior to \/usr\/bin. \nexport PATH=\/usr\/local\/bin:$PATH\nBy using brew, your new packages will be installed to: \n\/usr\/local\/Cellar\/python\nor \n\/usr\/local\/Cellar\/python3\nPackage install order shouldn't matter.","Q_Score":1,"Tags":"python","A_Id":45726701,"CreationDate":"2017-08-17T04:32:00.000","Title":"Questions about double install of Python on OSX","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"i am running the airflow pipeline but codes looks seems good but actually i'm getting the airflow.exceptions.AirflowException: Cycle detected in DAG. Faulty task: \ncan u please help to resolve this issue","AnswerCount":2,"Available Count":2,"Score":1.0,"is_accepted":false,"ViewCount":10290,"Q_Id":45731858,"Users Score":7,"Answer":"Without the code, it's kind of hard to help you. However, this means that you have a loop in your DAG. Generally, thie error happens when one of your task has a downstream task whose own downstream chain includes it again (A calls B calls C calls D calls A again, for example). \nThat's not permitted by Airflow (and DAGs in general).","Q_Score":10,"Tags":"python-2.7,apache-airflow","A_Id":45876209,"CreationDate":"2017-08-17T09:51:00.000","Title":"airflow.exceptions.AirflowException: Cycle detected in DAG. Faulty task","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"i am running the airflow pipeline but codes looks seems good but actually i'm getting the airflow.exceptions.AirflowException: Cycle detected in DAG. Faulty task: \ncan u please help to resolve this issue","AnswerCount":2,"Available Count":2,"Score":1.0,"is_accepted":false,"ViewCount":10290,"Q_Id":45731858,"Users Score":24,"Answer":"This can happen due to duplicate task_id'a in multiple tasks.","Q_Score":10,"Tags":"python-2.7,apache-airflow","A_Id":54864435,"CreationDate":"2017-08-17T09:51:00.000","Title":"airflow.exceptions.AirflowException: Cycle detected in DAG. Faulty task","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a bash script, in Python that runs on a Ubuntu server. Today, I mistakenly closed the Putty window after monitoring that the script ran correctly. \nThere is some usefull information that was printed during the scrip running and I would like to recover them. \nIs there a directory, like \/var\/log\/syslog for system logs, for Python logs? \n\nThis scripts takes 24 hours to run, on a very costly AWS EC2 instance, and running it again is not an option.\nYes, I should have printed usefull information to a log file myself, from the python script, but no, I did not do that.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":389,"Q_Id":45732437,"Users Score":1,"Answer":"Unless the script has an internal logging mechanism like e.g. using logging as mentioned in the comments, the output will have been written to \/dev\/stdout or \/dev\/stderr respectively, in which case, if you did not log the respective data streams to a file for persistent storage by using e.g. tee, your output is lost.","Q_Score":0,"Tags":"python,linux,bash,ubuntu,logging","A_Id":45801164,"CreationDate":"2017-08-17T10:17:00.000","Title":"Recover previous Python output to terminal","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Just wondering - as a fail safe backup, I'm setting up a python cronjob script that I can print various things to the terminal.\nI was wondering, once the cronjob has finished - am I able to take a terminal dump for the last output? Even if it errors out...\nProbably going to be running on a Linux VPS - CentOS (not sure if that 100% matters).","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":27,"Q_Id":45736070,"Users Score":0,"Answer":"You can redirect all prints \/dev\/tty to print in all terminals python exec.py &> \/dev\/tty). But cron is execute deattached from all terminals.","Q_Score":0,"Tags":"python,linux,cron,command-line-interface","A_Id":45736226,"CreationDate":"2017-08-17T13:12:00.000","Title":"Python print() Terminal dump after cronjob has finished","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I recently booted up my Pyzo IDE with the intention of doing some programming, however, upon starting up the python shell it gave this following error:\n\nThe given path was not found\nThe process failed to start (invalid command?). (1)\n\nI am not able to run any code with this error. If I try to run it nothing happens and the error re-appears.\nI have tried reinstalling the whole thing without success, I have tried reading the log but there was no error message and I have also tried looking for posts regarding the same problem without success. I was hoping if someone could explain what my problem is and a possible solution, thanks.","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":6080,"Q_Id":45742377,"Users Score":0,"Answer":"This is how I fixed it:\n\nI went to miniconda3 file in C:\\Users\\<user>\\Miniconda3 (might be in other file\/the thing is you need to find the miniconda3 file)\nFind the Python application\nRename it  to \"python.exe\"\nThen go to shell configuration and replace the path to the operable python program in \"exe\" with your path (for me it was \nC:\\Users\\<user>\\Miniconda3\\python.exe)","Q_Score":0,"Tags":"python,pyzo","A_Id":46764383,"CreationDate":"2017-08-17T18:16:00.000","Title":"Getting a \"The process failed to start (invalid command?). (1)\" error when starting up Pyzo","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"In Python, how do you check that an external program is running? I'd like to track my use of some programs, so I can see the amount of time I've spent with them. For example, if I launch my program , I want to be able to see if Chrome has already been launched, and if so, start a timer which would end when I exit Chrome.\nIve seen that then subprocess module can launch external programs, but this is not what I'm looking for.\nThanks in advance.","AnswerCount":3,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":47,"Q_Id":45772510,"Users Score":0,"Answer":"In my case I would try something using Task Manager data, probably using subprocess.check_output(ps)(for me that looks good), but you can the [psutil][1] library.\nTell us what you did later :)","Q_Score":0,"Tags":"python","A_Id":45772896,"CreationDate":"2017-08-19T14:05:00.000","Title":"python: how to check the use of an external program","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a large manifest file containing about 460,000 entries (all S3 files) that I wish to load to Redshift. Due to issues beyond my control a few (maybe a dozen or more) of these entries contain bad JSON that will cause a COPY command to fail if I pass in the entire manifest at once. Using COPY with a key prefix will also fail in the same way.\nTo get around this I have written a Python script that will go through the manifest file one URL at a time and issue a COPY command for each one using psycopg2. The script will additionally catch and log any errors to ensure that the script runs even when it comes across a bad file, and allows us to locate and fix the bad files.\nThe script has been running for a little more than a week now on a spare EC2 instance and is only around 75% complete. I'd like to lower the run time, because this script will be used again. \nMy understanding of Redshift is that COPY commands are executed in parallel, and with that I had an idea - will splitting the manifest file into smaller chunks and then running the script each of those chunks reduce the time it takes to load all the files?","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":792,"Q_Id":45785730,"Users Score":1,"Answer":"COPY command can load multiple files in parallel very fast and efficiently. So when you run one COPY command for each file in your python file, that's going to take a lot of time since you are not taking advantage of parallel loading.\nSo maybe you can write a script to find bad JSONs in your manifest and kick them out and run a single COPY with the new clean manifest? \nOr like you suggested, I would recommend splitting manifest file into small chunks so that COPY can run for multiple files at a time. (NOT a single COPY command for each file)","Q_Score":1,"Tags":"python,amazon-web-services,amazon-s3,amazon-redshift","A_Id":45787036,"CreationDate":"2017-08-20T18:49:00.000","Title":"Using multiple manifest files to load to Redshift from S3?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"The executable i created works completely fine on my system,but as soon as opened in an other system the cmd opens for a very brief time and then closes.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":31,"Q_Id":45786134,"Users Score":0,"Answer":"Open a command prompt window in windows and execute the .exe from there at the system were it does not work - then you will see the error message why it does not work, and that might help to figure out where the problem is.\nIf you just double-click the exe the error shows as well, but the cmd window is closed immediately since the process terminates","Q_Score":0,"Tags":"python-2.7,py2exe","A_Id":45798385,"CreationDate":"2017-08-20T19:40:00.000","Title":"why does the executable i created using py2exe only runs on my computer and not on others?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"The documentation tells me to type python3 -m venv myenv  into the command prompt, assuming the directory I'd like is called myenv. However, when I do this, I get:\n\"python3 is not recognized as an internal or external command, operable program or batch file.\"\nI have not seen this addressed on here, or in the documentation. My installation seems to have run correctly, because simply typing python shows me what it's supposed to show.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":164,"Q_Id":45790373,"Users Score":0,"Answer":"Python3 is not in your \"search path\"\nYou need to alter the Windows PATH value so the Python3.exe module is found.","Q_Score":0,"Tags":"python","A_Id":45790671,"CreationDate":"2017-08-21T06:15:00.000","Title":"Trying to create a virtual env on Windows 7, using Python 3.6.2","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am running pytest on a Jenkins machine; although I am not sure which Python it is actually running.\nThe machine is running OSX; and I did install various libraries (like numpy and others), on top of another Python install via Brew, so I keep things separated.\nWhen I run the commands from console; I specify python2.6 -m pytest mytest.py, which works, but when I run the same via shell in Jenkins, it fail, because it can't find the right libraries (which are the extra libraries I did install, after installing Python via Brew).\nIs there a way to know what is Jenkins using, so I can force it to run the correct python binary, which has access to my extra libraries?","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":171,"Q_Id":45806967,"Users Score":0,"Answer":"You can use which python to find which python Jenkins use.\nYou can use ABSPATH\/OF\/python to run your pytest","Q_Score":0,"Tags":"python,jenkins","A_Id":45807814,"CreationDate":"2017-08-21T23:45:00.000","Title":"how to find out which Python is called when I run pytest via Jenkins","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I installed Tensorflow on my macOS Sierra using pip install tensorflow. \nIm getting the following error:\nOSError: [Errno 1] Operation not \npermitted:'\/var\/folders\/zn\/l9gmn4613677f6mlrh6prtb00000gn\/T\/pip-xv3AU6-uninstall\/System\/Library\/Frameworks\/Python.framework\/Versions\/2.7\/Extras\/lib\/python\/numpy-1.8.0rc1-py2.7.egg-info'\nIs there anyway to resolve this?","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":109,"Q_Id":45824737,"Users Score":0,"Answer":"Use Python EasyInstall, is super easy:\nsudo easy_install pip","Q_Score":0,"Tags":"python-2.7,tensorflow","A_Id":45825713,"CreationDate":"2017-08-22T18:39:00.000","Title":"Error in installing Tensorflow on Mac","Data Science and Machine Learning":1,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I built a GUI in JavaFX with FXML for running a bunch of different Python scripts. The Python scripts continuously collect data from a device and print it to the console as it's collected in a loop at anywhere from around 10 to 70 Hz depending on which script was being run, and they don't stop on their own.\nI want the end-user to be able to click a button on my GUI which launches the scripts and lets them see the output. Currently, the best I have done was using Runtime.exec() with the command \"cmd \/c start cmd \/k python some_script.py\" which opens the windows command prompt, runs python some_script.py in it, and keeps the command prompt open so that you can see the output. The problem with this is that it only works on Windows (my OS) but I need to have universal OS  support and that it relies on Java starting an external program which I hear is not very elegant.\nI then tried to remedy this by executing the python some_script.py command in Java, capturing the process output with BufferedReader, creating a new JavaFX scene with just a TextArea in an AnchorPane to be a psuedo-Java-console and then calling .setText() on that TextArea to put the script output in it.\nThis kinda worked, but I ran into many problems in that the writing to the JavaFX console would jump in big chunks of several dozens of lines instead of writing to it line by line as the Python code was making Print() calls. Also, I got a bunch of NullPointerException and ArrayIndexOutOfBoundsException somewhat randomly in that Java would write a couple of hundred lines correctly but then throw those errors and freeze the program. I'm pretty sure both of these issues were due to having so much data at such high data rates which overflowed the BufferedReader buffer and\/or the TextArea.setText() cache or something similar.\nWhat I want to know is what approach I should take at this. I cannot migrate the Python code to Java since it relies on someone else's Python library to collect its data. Should I try to keep with the pseudo-Java-console idea and see if I can make that work? Should I go back to opening a command prompt window from Java and running the Python scripts and then add support for doing the same with Terminal in Mac and Linux? Is there a better approach I haven't thought of? Is the idea of having Java code call Python code and handle its output just disgusting and a horrible idea?\nPlease let me know if you would like to see any code (there is quite a lot) or if I can clarify anything, and I will try my best to respond quickly. Thank you!","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":250,"Q_Id":45852491,"Users Score":0,"Answer":"My solution was to still call the Python code from the Java Processbuilder, but use the -u option like python -u scriptname.py to specify unbuffered Python output.","Q_Score":0,"Tags":"java,python,user-interface,javafx,console","A_Id":45989477,"CreationDate":"2017-08-24T03:33:00.000","Title":"JavaFX show looping Python print output","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"How to produce kafka topic using message batch or buffer with pykafka. I mean one producer can produce many message in one produce process. i know the concept using message batch or buffer message but i dont know how to implement it. I hope someone can help me here","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":4131,"Q_Id":45859384,"Users Score":0,"Answer":"Just use the send() method.  You do not need to manage it by yourself.\n\nsend() is asynchronous.  When called it adds the record to a buffer of\n  pending record sends and immediately returns. This allows the producer\n  to batch together individual records for efficiency.\n\nYour task is only that configure two props about this: batch_size and linger_ms.\n\nThe producer maintains buffers of unsent records for each partition.\n  These buffers are of a size specified by the \u2018batch_size\u2019 config.\n  Making this larger can result in more batching, but requires more\n  memory (since we will generally have one of these buffers for each\n  active partition).\n\nThe two props will be done by the way below: \n\nonce we get batch_size worth of records for a partition it will be sent immediately regardless of this setting, however if we have fewer than this many bytes accumulated for this partition we will \u2018linger\u2019 for the specified time waiting for more records to show up.","Q_Score":1,"Tags":"python,apache-kafka,kafka-producer-api,pykafka","A_Id":45862977,"CreationDate":"2017-08-24T10:37:00.000","Title":"How to produce kafka topic using message batch or buffer with pykafka","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have been using Anaconda(4.3.23) on my GuestOS ubuntu 14.04 which is installed on Vmware on HostOS windows 8.1. I have setup an environment in anaconda and have installed many libraries, some of which were very hectic to install (not straight forward pip installs). few libraries had inner dependencies and had to be build together and from their git source.\nProblem\nI am going to use Cloud based VM (Azure GPU instance) to use GPU. but I don't want to get into the hectic installation again as i don't want to waste money on the time it will take me to install all the packages and libraries again\nIs there any way to transfer\/copy my existing env (which has everything already installed) to the Cloud VM?","AnswerCount":5,"Available Count":1,"Score":0.0399786803,"is_accepted":false,"ViewCount":24187,"Q_Id":45864595,"Users Score":1,"Answer":"You can probably get away with copying the whole Anaconda installation to your cloud instance.","Q_Score":18,"Tags":"python,ubuntu,anaconda,virtualenv,conda","A_Id":55539151,"CreationDate":"2017-08-24T14:44:00.000","Title":"How to transfer Anaconda env installed on one machine to another? [Both with Ubuntu installed]","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm installing anaconda python 3, version 4.4.0 on Windows machines.  The installs finishes normally.  But I'm getting errors when I try to use conda to update or to create virtual environments.  Package resolution completes and downloads the packages but then hangs for a long time before throwing out a load of errors like so:\nconda create -n py2 python=2.7 anaconda\nINFO menuinst_win32:__init__(182): Menu: name: 'Anaconda${PY_VER} ${PLATFORM}',\nprefix: 'c:\\anaconda\\envs\\py2', env_name: 'py2', mode: 'None', used_mode: 'system'\nINFO menuinst_win32:__init__(182): Menu: name: 'Anaconda${PY_VER} ${PLATFORM}',\nprefix: 'c:\\anaconda\\envs\\py2', env_name: 'py2', mode: 'None', used_mode: 'system'\nINFO menuinst_win32:__init__(182): Menu: name: 'Anaconda${PY_VER} ${PLATFORM}',\nprefix: 'c:\\anaconda\\envs\\py2', env_name: 'py2', mode: 'None', used_mode: 'system'\nINFO menuinst_win32:__init__(182): Menu: name: 'Anaconda${PY_VER} ${PLATFORM}',\nprefix: 'c:\\anaconda\\envs\\py2', env_name: 'py2', mode: 'None', used_mode: 'system'\nINFO menuinst_win32:__init__(182): Menu: name: 'Anaconda${PY_VER} ${PLATFORM}',\nprefix: 'c:\\anaconda\\envs\\py2', env_name: 'py2', mode: 'None', used_mode: 'system'\nINFO menuinst_win32:__init__(182): Menu: name: 'Anaconda${PY_VER} ${PLATFORM}',\nprefix: 'c:\\anaconda\\envs\\py2', env_name: 'py2', mode: 'None', used_mode: 'system'\nINFO menuinst_win32:__init__(182): Menu: name: 'Anaconda${PY_VER} ${PLATFORM}',\nprefix: 'c:\\anaconda\\envs\\py2', env_name: 'py2', mode: 'None', used_mode: 'system'\nThe environment will still have been created but this hanging and waiting is really becoming a problem.  I assume this is a fairly new bug because I've been installing anaconda and using conda for quite a while and never seen this error before.","AnswerCount":1,"Available Count":1,"Score":0.537049567,"is_accepted":false,"ViewCount":2583,"Q_Id":45879771,"Users Score":3,"Answer":"I posted this to the anaconda github page.  Apparently this is an issue with the displayed output but isn't actually an error in the install.  The virtual environment installations and updates do work, although they are slower than normal.","Q_Score":4,"Tags":"python,anaconda,conda","A_Id":46000463,"CreationDate":"2017-08-25T10:52:00.000","Title":"Anaconda3 conda command error menuinst_win32","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I need to create an Azure webjob that runs a python script which uses pyodbc.\nThe Azure compiler does not recognize pyodbc.\nHow do I install it or reference it in some way?","AnswerCount":2,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":962,"Q_Id":45881542,"Users Score":1,"Answer":"Get the working PyODBC first. To use PyODBC you should compile it in its 32bits version. Or install Python 2.7 or 3.4 (32-Bit) and type the command \"pip install pyodbc\"\nTo use it in Azure WebJob, put the PyODBC.pyd file in the root directory of your job and it should work.","Q_Score":1,"Tags":"python,azure,azure-sql-database","A_Id":45882593,"CreationDate":"2017-08-25T12:33:00.000","Title":"How to install a python library for an Azure webjob?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have built a photo booth on a raspberry pi. It works fantastic! But after some coding I now have a problem organizing my scripts. At the moment all scripts are launched via \"lxterminal -e\". So every script has it's own terminal window and everything runs simultaneously. I ask myself if this can be done in a more efficient way.\nThe basic function of the photo booth: People press a remote button, take a picture, picture is being shown on the built-in tft.\n\nstart.sh --> is being executed automatically after booting. It prepares the system, , sets up the camera and brings it in tethered mode. After all that it launches the other, following scripts:\nsystem-watchdog.sh --> checks continuously if one of the physical buttons on the photo booth is being pressed, to reboot or go into setup mode. It's an ever-lasting-while-loop.\nsync.sh --> syncs the captured photo to some folders, where they are modified for beeing printed. Also an ever-lasting-while-loop.\nbackup.sh --> copies all taken pictures to a usb device as a backup. This is a cronjob, every 5 minutes.\ntemp-logger.sh --> Logs the temperature of the CPU continuously, because I had heat-problems.\n\nThe cpu is running constantly at about 20-40%. Maybe with some optimization I could run on viewer scripts and less cpu usage.\nAny suggestions what I could use to organize the scripts in a better way?\nThanks for your suggestions!","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":48,"Q_Id":45883224,"Users Score":1,"Answer":"sync.sh --> syncs the captured photo to some folders, where they are modified for 1. being shown on the second screen, 2. upload to\n  dropbox and 3. being printed. Also an ever-lasting-while-loop.\nterminal-sync.sh --> copies the taken photos to the\n  second-screen-terminal, where they are shown in a gallery. It's also\n  an ever-lasting-while-loop.\n\nFor these, you can use inotifywait to wait for file availability before processing the file.\nYou should check using top, which script actually consuming CPU and why. Once you identify the script and why it consume CPU, then you can start finding optimized way to do the same job","Q_Score":0,"Tags":"python,linux,bash,scripting,organization","A_Id":45884636,"CreationDate":"2017-08-25T14:06:00.000","Title":"Bash \/ Python: Organization of several scripts","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have been stuck on this for a while. I've read many blogs but still struggling to understand how to set the path in my advanced settings in environment variables so that I can run my scripts in both cmd and python interpreter.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":38,"Q_Id":45899505,"Users Score":0,"Answer":"So the solution for this would be, setting the environment variable for python by following the steps below:\nClick on:- My Computer > Properties > Advanced System Settings > Environment Variables \nThen under system variables, create a new Variable called PyPath.\nIn this variable I have C:\\Python27\\Lib;C:\\Python27\\DLLs;C:\\Python27\\Lib\\lib-tk;\nThis would work for windows","Q_Score":0,"Tags":"python","A_Id":45899652,"CreationDate":"2017-08-26T20:41:00.000","Title":"How do I configure the path of my python scripts so I can open it with cmd and python interpreter","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm fairly new to Python and I have a python script that I would like to ultimately convert to a Windows executable (which I already know how to do). Is there a way I can write something in the script that would make it run as a background process in Windows instead of being visible in the foreground?","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":3312,"Q_Id":45911894,"Users Score":0,"Answer":"You can run the file using pythonw instead of python means run the command pythonw myscript.py instead of python myscript.py","Q_Score":7,"Tags":"python,windows,background-process","A_Id":60206875,"CreationDate":"2017-08-28T04:43:00.000","Title":"How to put a Python script in the background without pythonw.exe?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"So I want to install opencv in my raspberry pi 3b. When I sudo update, upgrade and finally reboot my rasp pi, I noticed that my LCD touch is now disabled. Good thing I have a back-up of the OS to make the LCD touch enabled again. How will I avoid this?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":36,"Q_Id":45913845,"Users Score":0,"Answer":"Before installing any new update in your Raspberry, check first provided drivers for your devices. Otherwise keep a copy of your drivers and reinstall them after update and upgrade.","Q_Score":0,"Tags":"python,raspberry-pi3","A_Id":45914010,"CreationDate":"2017-08-28T07:30:00.000","Title":"LCD not working after sudo update and upgrade","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Trying to install Google Cloud SDK(Python) on Windows 10 for All Users. Getting the following error. \nThis is new machine and start building fresh. Installed python 2.7 version prior to this. \nPlease help me to resolve this. \n\nOutput folder: C:\\Program Files (x86)\\Google\\Cloud SDK Downloading\n  Google Cloud SDK core. Extracting Google Cloud SDK core. Create Google\n  Cloud SDK bat file: C:\\Program Files (x86)\\Google\\Cloud\n  SDK\\cloud_env.bat Installing components. Welcome to the Google Cloud\n  SDK! This will install all the core command line tools necessary for\n  working with the Google Cloud Platform. Traceback (most recent call\n  last):   File \"C:\\Program Files (x86)\\Google\\Cloud\n  SDK\\google-cloud-sdk\\bin\\bootstrapping\\install.py\", line 214, in\n  \n      main()   File \"C:\\Program Files (x86)\\Google\\Cloud SDK\\google-cloud-sdk\\bin\\bootstrapping\\install.py\", line 192, in main\n      Install(pargs.override_components, pargs.additional_components)   File \"C:\\Program Files (x86)\\Google\\Cloud\n  SDK\\google-cloud-sdk\\bin\\bootstrapping\\install.py\", line 134, in\n  Install\n      InstallOrUpdateComponents(to_install, update=update)   File \"C:\\Program Files (x86)\\Google\\Cloud\n  SDK\\google-cloud-sdk\\bin\\bootstrapping\\install.py\", line 177, in\n  InstallOrUpdateComponents\n      ['--quiet', 'components', verb, '--allow-no-backup'] + component_ids)   File \"C:\\Program Files (x86)\\Google\\Cloud\n  SDK\\google-cloud-sdk\\lib\\googlecloudsdk\\calliope\\cli.py\", line 813, in\n  Execute\n      self._HandleAllErrors(exc, command_path_string, specified_arg_names)   File \"C:\\Program Files (x86)\\Google\\Cloud\n  SDK\\google-cloud-sdk\\lib\\googlecloudsdk\\calliope\\cli.py\", line 787, in\n  Execute\n      resources = args.calliope_command.Run(cli=self, args=args)   File \"C:\\Program Files (x86)\\Google\\Cloud\n  SDK\\google-cloud-sdk\\lib\\googlecloudsdk\\calliope\\backend.py\", line\n  754, in Run\n      resources = command_instance.Run(args)   File \"C:\\Program Files (x86)\\Google\\Cloud\n  SDK\\google-cloud-sdk\\lib\\surface\\components\\update.py\", line 99, in\n  Run\n      version=args.version)   File \"C:\\Program Files (x86)\\Google\\Cloud SDK\\google-cloud-sdk\\lib\\googlecloudsdk\\core\\updater\\update_manager.py\",\n  line 850, in Update\n      command_path='components.update')   File \"C:\\Program Files (x86)\\Google\\Cloud\n  SDK\\google-cloud-sdk\\lib\\googlecloudsdk\\core\\updater\\update_manager.py\",\n  line 591, in _GetStateAndDiff\n      command_path=command_path)   File \"C:\\Program Files (x86)\\Google\\Cloud\n  SDK\\google-cloud-sdk\\lib\\googlecloudsdk\\core\\updater\\update_manager.py\",\n  line 574, in _GetLatestSnapshot\n      *effective_url.split(','), command_path=command_path)   File \"C:\\Program Files (x86)\\Google\\Cloud\n  SDK\\google-cloud-sdk\\lib\\googlecloudsdk\\core\\updater\\snapshots.py\",\n  line 165, in FromURLs\n      for url in urls]   File \"C:\\Program Files (x86)\\Google\\Cloud SDK\\google-cloud-sdk\\lib\\googlecloudsdk\\core\\updater\\snapshots.py\",\n  line 186, in _DictFromURL\n      response = installers.ComponentInstaller.MakeRequest(url, command_path)   File \"C:\\Program Files (x86)\\Google\\Cloud\n  SDK\\google-cloud-sdk\\lib\\googlecloudsdk\\core\\updater\\installers.py\",\n  line 285, in MakeRequest\n      return ComponentInstaller._RawRequest(req, timeout=timeout)   File \"C:\\Program Files (x86)\\Google\\Cloud\n  SDK\\google-cloud-sdk\\lib\\googlecloudsdk\\core\\updater\\installers.py\",\n  line 329, in _RawRequest\n      should_retry_if=RetryIf, sleep_ms=500)   File \"C:\\Program Files (x86)\\Google\\Cloud\n  SDK\\google-cloud-sdk\\lib\\googlecloudsdk\\core\\util\\retry.py\", line 155,\n  in TryFunc\n      return func(*args, kwargs), None   File \"C:\\Program Files (x86)\\Google\\Cloud\n  SDK\\google-cloud-sdk\\lib\\googlecloudsdk\\core\\url_opener.py\", line 73,\n  in urlopen\n      return opener.open(req, data, timeout)   File \"c:\\users\\cpa8161\\appdata\\local\\temp\\tmpxcdivh\\python\\lib\\urllib2.py\",\n  line 429, in open\n      response = self._open(req, data)   File \"c:\\users\\cpa8161\\appdata\\local\\temp\\tmpxcdivh\\python\\lib\\urllib2.py\",\n  line 447, in _open\n      '_open', req)   File \"c:\\users\\cpa8161\\appdata\\local\\temp\\tmpxcdivh\\python\\lib\\urllib2.py\",\n  line 407, in _call_chain\n      result = func(*args)   File \"C:\\Program Files (x86)\\Google\\Cloud SDK\\google-cloud-sdk\\lib\\googlecloudsdk\\core\\url_opener.py\", line 58,\n  in https_open\n      return self.do_open(build, req)   File \"c:\\users\\cpa8161\\appdata\\local\\temp\\tmpxcdivh\\python\\lib\\urllib2.py\",\n  line 1195, in do_open\n      h.request(req.get_method(), req.get_selector(), req.data, headers)   File\n  \"c:\\users\\cpa8161\\appdata\\local\\temp\\tmpxcdivh\\python\\lib\\httplib.py\",\n  line 1042, in request\n      self._send_request(method, url, body, headers)   File \"c:\\users\\cpa8161\\appdata\\local\\temp\\tmpxcdivh\\python\\lib\\httplib.py\",\n  line 1082, in _send_request\n      self.endheaders(body)   File \"c:\\users\\cpa8161\\appdata\\local\\temp\\tmpxcdivh\\python\\lib\\httplib.py\",\n  line 1038, in endheaders\n      self._send_output(message_body)   File \"c:\\users\\cpa8161\\appdata\\local\\temp\\tmpxcdivh\\python\\lib\\httplib.py\",\n  line 882, in _send_output\n      self.send(msg)   File \"c:\\users\\cpa8161\\appdata\\local\\temp\\tmpxcdivh\\python\\lib\\httplib.py\",\n  line 844, in send\n      self.connect()   File \"C:\\Program Files (x86)\\Google\\Cloud SDK\\google-cloud-sdk\\lib\\third_party\\httplib2__init__.py\", line 1081,\n  in connect\n      raise SSLHandshakeError(e)\n  **httplib2.SSLHandshakeError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:661) Failed to install.","AnswerCount":6,"Available Count":1,"Score":0.0665680765,"is_accepted":false,"ViewCount":13684,"Q_Id":45927259,"Users Score":2,"Answer":"I just spent hours trying to make the installer run trying to edit ca cert files but the installer keeps wiping the directories as part of the installation process. In order to make the bundle gcloud sdk installer work, I ended up having to create an environment variable SSL_CERT_FILE and setting the path to a ca cert text file that contained the Google CAs + my company's proxy CA cert. Then the installer ran without issue. It seems that env variable is used by the python http client for CA validation.\nThen you need to run gcloud config set custom_ca_certs_file  before running gcloud init","Q_Score":2,"Tags":"google-cloud-platform,google-cloud-sdk,google-cloud-python","A_Id":56367158,"CreationDate":"2017-08-28T20:56:00.000","Title":"google cloud python sdk installation error - SSL Certification Error","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a bunch of Python scripts which are to be run by several different users. The scripts are placed in a Windows server environment. \nWhat I wish to achieve is to protect these scripts in such a way that standard users are allowed to run them but do not have the rights to read\/modify\/move them.\nIs this even possible and if so what is the optimal strategy?\nThanks in advance.","AnswerCount":3,"Available Count":2,"Score":-0.0665680765,"is_accepted":false,"ViewCount":381,"Q_Id":45931604,"Users Score":-1,"Answer":"There is no way to make them not readable but executable at the same time.","Q_Score":0,"Tags":"python,windows,security,server","A_Id":45931678,"CreationDate":"2017-08-29T05:55:00.000","Title":"Protect python script on Windows server","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a bunch of Python scripts which are to be run by several different users. The scripts are placed in a Windows server environment. \nWhat I wish to achieve is to protect these scripts in such a way that standard users are allowed to run them but do not have the rights to read\/modify\/move them.\nIs this even possible and if so what is the optimal strategy?\nThanks in advance.","AnswerCount":3,"Available Count":2,"Score":0.0665680765,"is_accepted":false,"ViewCount":381,"Q_Id":45931604,"Users Score":1,"Answer":"You can compile Python modules into native libraries with Cython and provide compiled files only; though it involves a lot of hassle and doesn't work in some cases. They still can be decompiled to C code but it will be mostly unreadable.\nPros: 1. compiled libraries can be imported as normal Python modules.\nCons: 1. requires additional setup; 2. doesn't work in some cases, e.g. celery tasks cannot reside in compiled modules because: 3. you lose introspection abilities; 4. tracebacks are basically unreadable.","Q_Score":0,"Tags":"python,windows,security,server","A_Id":45932177,"CreationDate":"2017-08-29T05:55:00.000","Title":"Protect python script on Windows server","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have got a Windows7 system, and I installed on it a Virtual Box 5.1.26.\nOn this virtual box, I installed a Debian64 - Linux server. (I think I configured it correctly, it is getting enough memory).\nWhen I want run a Python script on it (which is a web-scraping script, it process around 1000 pages and take it into database), i get always the same error message after a few minutes :\n\nUnable to allocate and lock memory. The virtual machine will be paused. Please close applications to free up memory or close the VM.\nOr something error message with : run out of time (when it want to load a website)\n\nIn the windows7 system my script is working without any problem, so I am a little bit confused now, what is the problem here?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":192,"Q_Id":45934277,"Users Score":0,"Answer":"First check the parameters of your virtual machine you might have given it much more RAM or processors than you have (or not enough).\nIf this is not the case close everything in the VM and only start the script.\nThese errors generally say that you don't have resources to perform the operation.\nCheck if your syntax is ok and if you are using the same version of python on both systems.\nNote that the VM is a guest system and can't have as much resources as your main OS because the main Os will die in some circumstances.","Q_Score":1,"Tags":"python,web-scraping,debian,virtualbox","A_Id":45934419,"CreationDate":"2017-08-29T08:31:00.000","Title":"How to run a python script successfully with a debian system on the VirtualBox?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Does anyone know how I'll be able to get the current user from airflow? We have our backend enabled to airflow\/contrib\/auth\/backends\/ldap_auth.pyand so users log in via that authentication and I want to know how to get the current user that clicks on something (a custom view we have as a plugin).","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":1335,"Q_Id":45935428,"Users Score":1,"Answer":"You can get it by calling {{ current_user.user.username }} or {{ current_user.user }} in your html jenja template.","Q_Score":0,"Tags":"python,airflow,flask-login,apache-airflow","A_Id":46274739,"CreationDate":"2017-08-29T09:28:00.000","Title":"Airflow: Get user logged in with ldap","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"if you are using a custom python layer - and assuming you wrote the class correctly in python - let's say the name of the class is \"my_ugly_custom_layer\"; and you execute caffe in the linux command line interface, \nhow do you make sure that caffe knows how to find the file where you wrote the class for your layer? do you just place the .py file in the same directory as the train.prototxt?\nor\nif you wrote a custom class in python you need to use the python wrapper interface?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":263,"Q_Id":45942883,"Users Score":2,"Answer":"Your python layer has two parameters in the prototxt: layer: where you define the python class name implementing your layer, and moduule: where you define the .py file name where the layer class is implemented.\nWhen you run caffe (either from command line or via python interface) you need to make sure your module is in the PYTHONPATH","Q_Score":1,"Tags":"python,caffe,layer","A_Id":45944107,"CreationDate":"2017-08-29T15:22:00.000","Title":"Bekeley caffe command line interface","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I know for integers one can use htonl and ntohl but what about pickle byte streams?\nIf I know that the next 150 bytes that are received are a pickle object, do I still have to reverse byte-order just in case one machine uses big-endian and the other is little-endian?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":358,"Q_Id":45992329,"Users Score":0,"Answer":"So I think I figured out the answer.\n\nBy default, the pickle data format uses a printable ASCII\n  representation.\n\nsince ASCII is a single byte representation the endianess does not matter.","Q_Score":0,"Tags":"python,sockets","A_Id":45992812,"CreationDate":"2017-09-01T01:52:00.000","Title":"Does Pickle.dumps and loads used for sending network data require change in byte order?","Data Science and Machine Learning":1,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"configured AWS Cli on Linux system.\nWhile running any command like \"aws ec2 describe-instances\" it is showing error \"Invalid IPv6 URL\"","AnswerCount":2,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":6082,"Q_Id":45999285,"Users Score":6,"Answer":"Ran into the same error. \nRunning this command fixed the error for me:\nexport AWS_DEFAULT_REGION=us-east-1\nYou might also try specifying the region when running any command:\naws s3 ls --region us-east-1\nHope this helps!\nor run aws configure and enter valid region for default region name","Q_Score":0,"Tags":"python-2.7,amazon-ec2,aws-cli","A_Id":46288793,"CreationDate":"2017-09-01T11:27:00.000","Title":"Invalid IPv6 URL while running commands using AWS CLI","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"configured AWS Cli on Linux system.\nWhile running any command like \"aws ec2 describe-instances\" it is showing error \"Invalid IPv6 URL\"","AnswerCount":2,"Available Count":2,"Score":0.0996679946,"is_accepted":false,"ViewCount":6082,"Q_Id":45999285,"Users Score":1,"Answer":"I ran into this issue due to region being wrongly typed. When you run aws configure during initial setup, if you try to delete a mistaken entry, it will end up having invalid characters in the region name.\nHopefully, running aws configure again will resolve your issue.","Q_Score":0,"Tags":"python-2.7,amazon-ec2,aws-cli","A_Id":50748839,"CreationDate":"2017-09-01T11:27:00.000","Title":"Invalid IPv6 URL while running commands using AWS CLI","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I tried making a cronjob to run my script every second, i used *\/60 * * * * this a parameter to run every second but it didn't worked, pls suggest me how should i run my script every second ?","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":1441,"Q_Id":46024476,"Users Score":0,"Answer":"Well, no. Your argument - *\/60 * * * * - means \"run every 60 minutes\". And you can't specify a shorter interval than 1 minute, not in standard Unix cron anyway.","Q_Score":1,"Tags":"python,cron","A_Id":46024560,"CreationDate":"2017-09-03T14:34:00.000","Title":"I want to make a cronjob such that it runs a python script every second","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am migrating my java project from Rabbit MQ to Kafka (for some reasons).\nHowever, I am facing one difficulty. \nIn current workflow, I post all the messages to rabbit mq exchange, and based on the routing key of the messages, the messages are redirected to one or more queues.\nI want to retain the same functionality in Kafka also. ( I know kafka is not originally suited for it but I want a workaround).\nBasically, I want something like this: whenever a message is received by a topic, based on the meta present in the message, the message should be redirected to other set of topics.\nWhat is the fastest way to achieve this? I would prefer python or java solution\nThanks","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":391,"Q_Id":46048165,"Users Score":0,"Answer":"If you publish Kafka messages with keys they will be directed to topic partitions such that all similar keys go to the same partition.\nAlternatively you can use Kafka Streams to read an input topic and route messages to a set of output topics based on the keys provided with the messages.","Q_Score":0,"Tags":"java,python,apache-kafka,workflow","A_Id":46048325,"CreationDate":"2017-09-05T06:18:00.000","Title":"How to add workflow to Kafka messages?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Is it possible to install Python from cmd on Windows? If so, how to do it?","AnswerCount":3,"Available Count":1,"Score":0.0665680765,"is_accepted":false,"ViewCount":66195,"Q_Id":46056161,"Users Score":1,"Answer":"For Windows\nI was unable to find a way to Download python using just CMD but if you have python.exe in your system then you can use the below Method to install it  (you can also make .bat file to automate it.)\n\nDownload the python.exe file on your computer from the official site.\n\nOpen CMD and change Your directory to the path where you have python.exe\n\nPast this code in your Command prompt make sure to change the name with your file version In the below code(e.g python-3.8.5.exe)\n\n\npython-3.6.0.exe \/quiet InstallAllUsers=1 PrependPath=1 Include_test=0\nIt will also set the path Variables.","Q_Score":7,"Tags":"python,cmd,installation,python-install","A_Id":63153547,"CreationDate":"2017-09-05T13:26:00.000","Title":"How to install Python using Windows Command Prompt","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am fresh reinstalling python 2.7 (python, pip) and 3.6 (python3, pip3). However, when I installed pipenv and virtualenv for pythn3 using pip3 - the corresponding bash commands are not added, so simple things like $ virtualenv --version\nfail. \nWhat is going on here? can anyone help, please? \nThanks","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":373,"Q_Id":46062103,"Users Score":1,"Answer":"From your Python version directory, Pip installs packages to '.\/lib\/python\/site-packages\/' and creates the binary in '.\/bin\/'. If you install a package to your User directory with:\npip install --user [packagename]\nthe Python version directory is: \n\/Users\/[username]\/Library\/Python\/[version]\/\notherwise the directory is usually: \n\/Library\/Frameworks\/Python.framework\/Versions\/[version].\nCreate a symbolic link from the virtualenv binary in \/Users\/[username]\/Library\/Python\/3.6\/bin\/ to \/usr\/local\/bin\/ in your path with ln -s:\nln -s \/Users\/[username]\/Library\/Python\/3.6\/bin\/virtualenv \/usr\/local\/bin\/virtualenv\nand you should be all set.\nIf you need to delete the symbolic link simply use rm:\nrm \/usr\/local\/bin\/virtualenv","Q_Score":0,"Tags":"python,bash,macos","A_Id":46064025,"CreationDate":"2017-09-05T19:31:00.000","Title":"osx pip python3 - installing packages does not create alias","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am performing some operation using DataProcPySparkOperator. This operator is only taking a cluster name as parameter, there is no option to specify region and by default it considers cluster with global region.\nFor clusters with regions other than global, the following error occurs:\n\ngoogleapiclient.errors.HttpError: https:\/\/dataproc.googleapis.com\/v1\/projects\/\/regions\/global\/jobs:submit?alt=json returned \"No current cluster for project id '' with name ''`\n\nAm i missing anything or its just limitation with these operators?","AnswerCount":2,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":822,"Q_Id":46067848,"Users Score":1,"Answer":"We were running into the same issue using Google Composer, which was running Airflow 1.9.  We upgrade to Airflow 1.10 and this fixed the issue.  Google just released it.  Now, when I run the operator it can see the cluster - it looks in the correct region.  Previously it was always looking in global.","Q_Score":1,"Tags":"python,airflow,google-cloud-dataproc","A_Id":53117725,"CreationDate":"2017-09-06T06:01:00.000","Title":"Airflow DataProcPySparkOperator not considering cluster other than global region","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm highly confused about this. Python3 is installed per default on the MacBook.\nwhich python3 will output \/Library\/Frameworks\/Python.framework\/Versions\/3.6\/bin\/python3\nGreat, so that's my SDK to put into IntelliJ IDEA, one should think.\nI have the Python plugin for IDEA. However, I can't run Python files. So I try to change the configuration and set it to the above PATH for the Python interpreter.\nHowever, still nothing. Trying to run the Python file inside IDEA will prompt a new configuration?\nI can run the script just file doing python3 script.py in the terminal? I know the path for the Python3 library, yet, IDEA doesn't recognise it at all and doesn't save the configuration.\nWhat am I doing wrong in this process? This should be fairly easy to set up but turns out it isn't :) \nI even tried to create a Python 3.6.2 virtual environment with the IDEA internal tool - same thing? It doesn't allow me to run the Python3 script from inside IDEA. \nShould I use python from usr\/bin\/python? If I cd there, I can see Python3. But inside IDEA, i only have access to Python2..","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":5298,"Q_Id":46070112,"Users Score":2,"Answer":"Try this in menu of IDEA: File -> Settings -> Project: Name of project -> Project Interpreter and from above in the window you can choice interpreter version or virtualenv.","Q_Score":1,"Tags":"python,macos,intellij-idea","A_Id":46070218,"CreationDate":"2017-09-06T08:17:00.000","Title":"How do I set up Python 3 with IntelliJ IDEA on OSX?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have fresh ubuntu 16.04 setup for production.\nInitially if when i type\npython --version gives me python 2.7 and python3 --version gives me python 3.5\nbut i want python points to python3 by default, so in my ~\/.bashrc\nalias python=python3 and source ~\/.bashrc,\nAfter that i install pip using sudo apt-get install python-pip and when i type pip --version it prints pip 8.1.1 from \/usr\/lib\/python2.7\/dist-packages (python 2.7) instead that i want packages to be installed into and get from \/usr\/local\/lib\/python3.5\/dist-packages.\nI have django application which is written with python3 compatible code. \nUpdate:  I want to install other packages which have to load from python3 dist-packages not just pip. I don't want to remove python 2.7 from ubuntu it will break other programs, i thought alias python=python3 would install packages into python3.5 dist-packages as well.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":421,"Q_Id":46107451,"Users Score":0,"Answer":"You need to use pip3 as the command.\npip3 install coolModule\nBe sure to add to your bash profile.\nalias pip3=\"python3 -m pip\"","Q_Score":1,"Tags":"python,ubuntu","A_Id":46107476,"CreationDate":"2017-09-08T01:51:00.000","Title":"python3 loading dist-packages from python2 on ubuntu","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":1},{"Question":"Excuse the awkward question wording.\nI've made a script. I would like for others to download it from github, and run it by typing programName argument1 argument2, similar to any other popular app used through the terminal such as Jupyter or even opening Atom\/Sublime\/etc. (ex:jupyter notebook, atom .). However, unlike Jupyter or sublime, my script isn't launching another app, it's a small app meant to be used in the shell.  \nCurrently, to use my script, one must type into the command line python programName.py arg1 etc from within the file's directory.   \nHow do I allow others to dl it and use it from anywhere (not having to be within the directory), without having to type out the whole python programName.py part, and only having to type programName arg1?","AnswerCount":4,"Available Count":1,"Score":0.049958375,"is_accepted":false,"ViewCount":78,"Q_Id":46111984,"Users Score":1,"Answer":"You can simply add your script to PATH variable in order to launch it from anywhere.\nIn Linux distros, you can simply do it by using a bash command PATH=$PATH:\/path\/to\/your\/script.\nMake sure you don't have the space around the \"=\" operator.\nNow, the second thing is you don't want your script to be named as pythonProgram.py.You can  simply remove the extension .py from PythonProgram.py by adding a single line to the starting of your script.\nOpen up your script and at the very begining type #!\/usr\/bin\/python.This should be the first line of your code.This line is called shebang and is used to tell the bash which interpreter to be used for compiling the script.\nIf everything went right, you will be able to run your script as pythonProgram arg1.","Q_Score":1,"Tags":"python,python-2.7,python-3.x,shell,command-line","A_Id":46112425,"CreationDate":"2017-09-08T08:27:00.000","Title":"How would I allow others to use my script from anywhere in the shell without having to type out the file extension?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a server process which receives requests from a web clients. \nThe server has to call an external worker process ( another .py ) which streams data to the server and the server streams back to the client.\nThe server has to monitor these worker processes and send messages to them ( basically kill them or send messages to control which kind of data gets streamed ). These messages are asynchronous ( e.g. depend on the web client )\nI thought in using ZeroMQ sockets over an ipc:\/\/-transport-class , but the call for socket.recv() method is blocking.\nShould I use two sockets ( one for streaming data to the server and another to receive control messages from server )?","AnswerCount":2,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":563,"Q_Id":46139185,"Users Score":2,"Answer":"Using a separate socket for signalling and messaging is always better\nWhile a Poller-instance will help a bit, the cardinal step is to use separate socket for signalling and another one for data-streaming. Always. The point is, that in such setup, both the Poller.poll() and the event-loop can remain socket-specific and spent not more than a predefined amount of time, during a real-time controlled code-execution.\nSo, do not hesitate to setup a bit richer signalling\/messaging infrastructure as an environment where you will only enjoy the increased simplicity of control, separation of concerns and clarity of intents.\nZeroMQ is an excellent tool for doing this - including per-socket IO-thread affinity, so indeed a fine-grain performance tuning is available at your fingertips.","Q_Score":3,"Tags":"python,sockets,ipc,zeromq","A_Id":46140815,"CreationDate":"2017-09-10T09:27:00.000","Title":"ZeroMQ bidirectional async communication with subprocesses","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to use Python to find a faster way to sift through a large directory(approx 1.1TB) containing around 9 other directories and finding files larger than, say, 200GB or something like that on multiple linux servers, and it has to be Python.\nI have tried many things like calling du -h with the script but du is just way too slow to go through a directory as large as 1TB. \nI've also tried the find command like find .\/ +200G but that is also going to take foreeeever.\nI have also tried os.walk() and doing .getsize() but it's the same problem- too slow.\nAll of these methods take hours and hours and I need help finding another solution if anyone is able to help me. Because not only do I have to do this search for large files on one server, but I will have to ssh through almost 300 servers and output a giant list of all the files > 200GB, and the three methods that i have tried will not be able to get that done. \nAny help is appreciated, thank you!","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":2409,"Q_Id":46144952,"Users Score":0,"Answer":"It is hard to imagine that you will find a significantly faster way to traverse a directory than os.walk() and du. Parallelizing the search might help a bit in some setups (e.g. SSD), but it won't make a dramatic difference.\nA simple approach to make things faster is by automatically running the script in the background every hour or so, and having your actual script just pick up the results. This won't help if the results need to be current, but might work for many monitoring setups.","Q_Score":0,"Tags":"python,linux","A_Id":46145014,"CreationDate":"2017-09-10T19:51:00.000","Title":"Faster way to find large files with Python?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I would like to import some python files as dependency in airflow and use an function in python_callable in PythonOperator. I tried placing the dependency python file in the dags folder, but doesn't seem to work. I'm assuming the DAG is being moved to some other folder, before being executed. Help appreciated!!","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":996,"Q_Id":46154966,"Users Score":3,"Answer":"Get an idea about your environment variable \"AIRFLOW_HOME\". If it is not declared, it points to your home directory by default. In airflow, the Python scripts are normally placed at \"AIRFLOW_HOME\"\/airflow\/dags\nYou can place the Python script and it's dependencies there but I strongly recommend to create and package for the dependencies and install it in your Python environment along airflow and avoid the unnecessary clutter of files in your dag folders.","Q_Score":1,"Tags":"python,airflow,apache-airflow","A_Id":46170951,"CreationDate":"2017-09-11T11:44:00.000","Title":"Airflow: External python in python_callable of PythonOperator","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am designing a backend service that sends to some mobile app user messages from my server. \nHaving retrieved their device token using a webhook, should I store these tokens in DB and call create_platform_endpoint() every time I need to send a message? \nOr storing device token on backend is needless and excessive and once having obtained ARN from create_platform_endpoint(), there is no need to store mobile device tokens on backend?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":359,"Q_Id":46161694,"Users Score":1,"Answer":"I would store the device token (and I do).  I was able to use it when I needed to transparently migrate a few million endpoints from a US region to one in Asia.  Might also come in handy if you also wanted to migrate off of AWS at some point. \n The only reason I wouldn't store it is because of GDPR, but if you're not worried about that then it's not like it's a lot of data.\nAlso you only need to call create_platform_endpoint() once, storing the result ARN.  Watch out for a change to the device token.  If it does, you'll need to contact your server and notify it that it's changed and call create_platform_endpoint() again.  I've never actually seen this happen, however.","Q_Score":0,"Tags":"python,amazon-web-services,push-notification,amazon-sns","A_Id":46165313,"CreationDate":"2017-09-11T17:56:00.000","Title":"Storing endpoint ARN vs. Device Token at backend","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"Code:\nsh 'python .\/selenium\/xy_python\/run_tests.py'\nError:\nTraceback (most recent call last):\n  File \".\/selenium\/xy_python\/run_tests.py\", line 6, in \n    import nose\nImportError: No module named nose","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":5801,"Q_Id":46166480,"Users Score":0,"Answer":"I recommend explicitly activating a python env before you run your script in your jenkinsfile to ensure you are in an environment which has nose installed.\nPlease check out virtualenv, tox, or conda for information on how to do so.","Q_Score":2,"Tags":"python,python-3.x,dsl","A_Id":46199573,"CreationDate":"2017-09-12T01:22:00.000","Title":"Calling a Python Script from Jenkins Pipeline DSL causing import error","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"i see a lot of examples of how to use multiprocessing but they all talk about spawning workers and controlling them while the main process is alive. my question is how to control background workers in the following way:\nstart 5 worker from command line:\n\nmanager.py --start 5\n\nafter that, i will be able to list and stop workers on demand from command line:\n\nmanager.py --start 1    #will add 1 more worker\nmanager.py --list\nmanager.py --stop 2\nmanager.py --sendmessagetoall \"hello\"\nmanager.py --stopall\n\nthe important point is that manager.py should exit after every run. what i don't understand is how to get a list of already running workers from an newly created manager.py program and communicate with them.\nedit: Bilkokuya suggested that i will have (1)a manager process that manage a list of workers... and will also listen to incoming commands. and (2) a small command line tool that will send messages to the first manager process... actually it sounds like a good solution. but still, the question remains the same - how do i communicate with another process on a newly created command line program (process 2)? all the examples i see (of Queue for example) works only when both processes are running all the time","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":223,"Q_Id":46174679,"Users Score":0,"Answer":"The most portable solution I can suggest (although this will still involve further research for you), is to have a long-running process that manages the \"background worker\" processes. This shouldn't ever be killed off, as it handles the logic for piping messages to each sub process.\nManager.py can then implement logic to create communication to that long-running process (whether that's via pipes, sockets, HTTP or any other method you like). So manager.py effectively just passes on a message to the 'server' process \"hey please stop all the child processes\" or \"please send a message to process 10\" etc.\nThere is a lot of work involved in this, and a lot to research. But the main thing you'll want to look up is how to handle IPC (Inter-Process Communication). This will allow your Manager.py script to interact with an existing\/long-running process that can better manage each background worker.\nThe alternative is to rely fully on your operating system's process management APIs. But I'd suggest from experience that this is a much more error prone and troublesome solution.","Q_Score":0,"Tags":"python,multiprocessing,python-multiprocessing","A_Id":46175030,"CreationDate":"2017-09-12T10:59:00.000","Title":"using python multiprocessing to control independent background workers after the spawning process has been closed","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm trying to connect to a PostgreSQL database on Google Cloud using SQLAlchemy. Making a connection to the database requires specifying a database URL of the form:  dialect+driver:\/\/username:password@host:port\/database\nI know what the dialect + driver is (postgresql), I know my username and password, and I know the database name. But I don't know how to find the host and port on the Google Cloud console. I've tried using the instance connection name, but that doesn't seem to work. Anyone know where I can find this info on Google Cloud?","AnswerCount":3,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":6507,"Q_Id":46178062,"Users Score":3,"Answer":"Hostname is the Public IP address.","Q_Score":3,"Tags":"python,postgresql,google-cloud-platform,google-cloud-storage,google-cloud-sql","A_Id":64040093,"CreationDate":"2017-09-12T13:42:00.000","Title":"What is the hostname for a Google Cloud PostgreSQL instance?","Data Science and Machine Learning":0,"Database and SQL":1,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"In local system elastic search works perfectly but when i'm trying to search in server system it shows in console : \"ConnectionTimeout caused by - ReadTimeoutError(HTTPConnectionPool(host=u'localhost', port=9200): Read timed out. (read timeout=10))\"","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":3169,"Q_Id":46188842,"Users Score":0,"Answer":"It appears that the localhost value you are trying to connect to is a Unicode string host=u'localhost. Not sure how you are getting\/assigning that value into a variable, but you should try to encode\/convert it to ASCII so that it can be properly interpreted during the HTTP connection routine.","Q_Score":0,"Tags":"python,django,elasticsearch","A_Id":46230007,"CreationDate":"2017-09-13T04:25:00.000","Title":"ConnectionTimeout caused by - ReadTimeoutError(HTTPConnectionPool(host=u'localhost', port=9200): Read timed out. (read timeout=10))","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I have installed Anaconda on my Windows 10 system. Now I want to use python in newly installed Atom IDE. Atom cannot find python directory as it's not added to the environment variable path. \nI installed python 3.6 separately and added it to path variables to overcome this issue. However, I still run into issues like missing .dll files. I found that this will continue as long as there Anaconda is installed on the system. \nIs there a way I can add Anaconda python path to Atom or should I just add Anaconda library to path variables (which is not recommended by Anaconda)?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":1003,"Q_Id":46201898,"Users Score":0,"Answer":"If you want to run python scripts inside atom, install script package from atom packages. Then open anaconda prompt, cd into your preferred directory and run atom . Now when you run Ctrl+Shift+B to run your python scripts, this script package will run with anaconda python.","Q_Score":1,"Tags":"anaconda,atom-editor,path-variables,sublime-anaconda,python-install","A_Id":64047273,"CreationDate":"2017-09-13T15:49:00.000","Title":"Using Anaconda python directory in Atom IDE","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have the following scenario. Data (packets in this case) are received processed by a Python function in real-time as each datum streams by. So each datum is received and translated into a python object. There is a light-weight algorithm done on that object which returns an output (small dictionary). Then the object is discarded and the next one is handled. I have that program running. \nNow, for each object the algorithm will produce a small dictionary of output data. This dictionary needs to be processed (also in real time) by a separate, second algorithm. I envision my code running two processes. I need to have the second process \"listen\" for the outputs of the first. \nSo how do I write this second algorithm in python so it can listen for and accept the data that is produced by the first? for a concrete example, suppose the first algorithm applies the timestamp, then passes to a buffer, and the second algorithm listens-- it grabs from the buffer and processes it. If there is nothing in the buffer, then as soon as something appears it processes it.","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":395,"Q_Id":46202639,"Users Score":0,"Answer":"If you need to use different processes (as opposed to multiple functions in a single process), perhaps a messaging queue would work well for you? Whereby your first process would do whatever it does and put the results in a message queue, which your second process is listening to.\nThere are obviously a lot of options available but based on your description, this sounds like a reasonable approach.","Q_Score":0,"Tags":"python,multiprocessing,buffer","A_Id":46202744,"CreationDate":"2017-09-13T16:31:00.000","Title":"How to send, buffer, and receive Python objects between two python programs?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I had a similar issue when a Python script called from a scheduled task on a windows server tried to access a network shared drive. It would run from the IDLE on the server but not from the task. I switched to using a local drive it worked fine. This script works if run from console or IDLE on the server and partially executes when run as a scheduled task. It pulls data from a MSSQL database and creates a local csv. That works called from the task but the part to upload the file to a Google Drive does not. I have, as I did, before try other methods of calling outside of the scheduled task ex Powershell, bat file... but same results. I am using google-api-python-client (1.6.2) and can't find anything. Thanks in advance!","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":33,"Q_Id":46206424,"Users Score":0,"Answer":"I found my answer. In the optional field of the Windows Scheduled Task Action dialog, \"Start in\" I added the path to the Python Scripts folder and the script now runs perfect.","Q_Score":0,"Tags":"python-2.7,google-api-python-client","A_Id":46245436,"CreationDate":"2017-09-13T20:37:00.000","Title":"Python27 to upload a file to google drive does not work when run as a windows scheduled task. Why?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am attempting to update pip for IDLE (Python 3.5) on mac using the terminal.\nIt tells me that pip is up to date in anaconda:\nDaniels-MacBook-Pro-3:~ danielsellers$ pip install --upgrade pip\nRequirement already up-to-date: pip in .\/anaconda\/lib\/python3.6\/site-packages\nDaniels-MacBook-Pro-3:~ danielsellers$ \nBut IDLE is recommending I update pip, which I am inclined to do because it keeps crashing while trying to install modules.\nHow do I update the version of pip which IDLE is running? I'm somewhat new to python, thanks in advance","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":112,"Q_Id":46287979,"Users Score":0,"Answer":"If you use Anaconda you are fine, if you don't uninstall it. Systems get very confused on what you want to update\/use so just pick one and use it!","Q_Score":0,"Tags":"python,macos","A_Id":46288007,"CreationDate":"2017-09-18T20:49:00.000","Title":"Pip update is failing in terminal because Anaconda is up to date - idle is not","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"In Python CGI, when I call name = os.popen('whoami').read(), the name will return as Apache. How can I get the original login name that was login to this machine? For example, in terminal windows, when I run whoami, the login name return as \"operator\". In Apache server, is there a way to get the login name as \"operator\"?\nThanks!\nTom Wang","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":183,"Q_Id":46289627,"Users Score":0,"Answer":"Python CGI script gets executed when APACHE gets a request. APACHE redirects the request to python. Since, user 'APACHE' would be running this script, you get that as the id. You can only get the id as operator if user 'operator' is running the script. Users connect to your script using a web browser which is intercepted by APACHE. There is no way to determine which user is making the request from web browser as they never login to the machine where APACHE is running. You can get their IP\/port using the requests library","Q_Score":0,"Tags":"python,apache","A_Id":46290001,"CreationDate":"2017-09-18T23:35:00.000","Title":"How to get original login name while in Python CGI Apache web server?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"i have searched many links but didn't find any solution to the problem i have. I have seen option to pass key\/var into airflow UI ,but it is really confusing for end user to work as which key is associated with which dag. Is there any way to implement functionality like :\nWhile running an airflow job, end user will be asked for values to some parameters and after entering those details airflow will run the job.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":1915,"Q_Id":46294026,"Users Score":7,"Answer":"Unfortunately, it's not possible to wait for user input let say in Airflow UI. DAG's are programmatically authored which means defined as a code and they should not be dynamic since they are imported in web server, scheduler and workers in same time and has to be same.\nThere are two workarounds I came up with, and we use first in production for a while.\n1) Create a small wrapper around Variables. For each DAG then load Variables and compose arguments which are then passed into Operators via default_arguments.\n2) Add Slack operator which can be programmatically configured to wait for user input. Afterwards, propagate that information via XCOM into next Operator.","Q_Score":8,"Tags":"python,parameter-passing,airflow,apache-airflow","A_Id":46296899,"CreationDate":"2017-09-19T07:06:00.000","Title":"In airflow can end user pass parameters to keys which are associated with some specific dag","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am getting the below error while running the cqlsh in cassandra 2.2.10 ?? Can somebody help me to pass this hurdle:\n\n[root@rac1 site-packages]# $CASSANDRA_PATH\/bin\/cqlsh\nPython Cassandra driver not installed, or not on PYTHONPATH. You might\n  try \u201cpip install cassandra-driver\u201d.\nPython: \/usr\/local\/bin\/python Module load path:\n  [\u2018\/opt\/cassandra\/apache-cassandra-2.2.10\/bin\/..\/lib\/six-1.7.3-py2.py3-none-any.zip\u2019,\n  \u2018\/opt\/cassandra\/apache-cassandra-2.2.10\/bin\/..\/lib\/futures-2.1.6-py2.py3-none-any.zip\u2019,\n  \u2018\/opt\/cassandra\/apache-cassandra-2.2.10\/bin\/..\/lib\/cassandra-driver-internal-only-3.5.0.post0-d8d0456.zip\/cassandra-driver-3.5.0.post0-d8d0456\u2019,\n  \u2018\/opt\/cassandra\/apache-cassandra-2.2.10\/bin\u2019,\n  \u2018\/usr\/local\/lib\/python2.7\/site-packages\u2019,\n  \u2018\/usr\/local\/lib\/python27.zip\u2019, \u2018\/usr\/local\/lib\/python2.7\u2019,\n  \u2018\/usr\/local\/lib\/python2.7\/plat-linux2\u2019,\n  \u2018\/usr\/local\/lib\/python2.7\/lib-tk\u2019, \u2018\/usr\/local\/lib\/python2.7\/lib-old\u2019,\n  \u2018\/usr\/local\/lib\/python2.7\/lib-dynload\u2019]\nError: can\u2019t decompress data; zlib not available","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":2223,"Q_Id":46314983,"Users Score":0,"Answer":"Cassandra uses the python driver bundled in-tree in a zip file. If your Python runtime was not built with zlib support, it cannot use the zip archive in the PYTHONPATH. Either install the driver directly (pip install) as suggested, or put a correctly configured Python runtime in your path.","Q_Score":1,"Tags":"python,linux,cassandra","A_Id":47167910,"CreationDate":"2017-09-20T06:42:00.000","Title":"Python Cassandra driver not installed, or not on PYTHONPATH","Data Science and Machine Learning":0,"Database and SQL":1,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"So I have a rather large json database that I'm maintaining with python. It's basically scraping data from a website on an hourly basis and I'm running daily restarts on the system (Linux Mint) via crontab. My issue is that if the system happens to restart during the database updating process  I get corrupted json files. \nMy question is if there is anyway to delay the system restart in my script to ensure the system shuts down at a safe time? I could issue the restart command inside the script itself but if I decide to run multiple scripts that are similar to this in the future I'll obviously have a problem.\nAny help here would be greatly appreciated. Thanks\nEdit: Just to clarify I'm not using the python jsondb package. I am doing all file handling myself","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":33,"Q_Id":46319434,"Users Score":0,"Answer":"So my solution to this was quite simple (Just protect data integrity):\nBefore write - backup the file\nOn successful write - delete the backup (Avoids doubling the size of the DB)\nWhere ever a corrupted file is encountered - revert to backup\nThe idea being that if the system closes the script during the file backup, it doesn't matter, we still have the original and if the system closes the script during write to the original file, the backup never gets deleted and we can just use that instead. All and all it was just an extra 6 lines of code and appears to have solved the issue.","Q_Score":0,"Tags":"python-2.7,jsondb","A_Id":46363482,"CreationDate":"2017-09-20T10:19:00.000","Title":"Delaying system shutdown during json DB update in python","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have an Ubuntu 16.04 system with an Anaconda installation. I want to compile and install OpenCV 3.3 and use also the Python bindings. I used the following CMake command:\n\ncmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=\/usr\/local -D WITH_CUDA=ON -D D WITH_FFMPEG=1 -D WITH_CUBLAS=ON -D WITH_TBB=ON -D WITH_V4L=ON -D WITH_QT=ON -D WITH_OPENGL=ON -D INSTALL_PYTHON_EXAMPLES=ON -D INSTALL_C_EXAMPLES=OFF -D OPENCV_EXTRA_MODULES_PATH=~\/opencv_contrib-3.3.0\/modules -D BUILD_EXAMPLES=ON -D BUILD_TIFF=ON -D PYTHON_EXECUTABLE=\/home\/guel\/anaconda2\/envs\/py27\/bin\/python -D PYTHON2_LIBRARIES=\/home\/guel\/anaconda2\/envs\/py27\/lib\/libpython2.7.so -D PYTHON2_PACKAGES_PATH=\/home\/guel\/anaconda2\/envs\/py27\/lib\/python2.7\/site-packages -DWITH_EIGEN=OFF -D BUILD_opencv_cudalegacy=OFF ..\n\nThe command does the job but then, of course, OpenCV is installed only for a specific conda environment that I created. However, I want to be able to use it also from different environments without having to go through the compilation for each and every environment. Is there a way to achieve that in a simple way? Since the OpenCv libraries are actually installed in \/usr\/local, I can imagine that there must be a simple way to link the libraries to each new conda enviroment but I couldn't figure out exactly how.","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":2609,"Q_Id":46339134,"Users Score":0,"Answer":"So you are providing the python package and library path to environment specific location, in order to make it available environment try using the anaconda\/bin and lib path. Can't make it as a comment due to low reputation.","Q_Score":3,"Tags":"python,opencv,anaconda,conda","A_Id":46645511,"CreationDate":"2017-09-21T08:34:00.000","Title":"Installing OpenCV for all conda environments","Data Science and Machine Learning":1,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm using xmlrunner in combination with unittest in python for testing purposes by running \nxmlrunner.XMLTestRunner(outsuffix=\"\",).run(suite)\nwhere suite is standard unittest.suite.TestSuite\nWhen I run the tests on my windows machine I get an output by using the standard print() function in my tests. Unfortunately I don't get any output to my terminal when running the tests on my fedora machine. The output is correctly logged to an XML file but I would like to have the output directly to stdout \/ terminal.\nDid I miss something that explains this behaviour?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":249,"Q_Id":46346745,"Users Score":0,"Answer":"OK, I found the reason. On my Fedora 24 machine an old version of xmlrunner (1.14.0 - something) was installed. I used pip to install the lates xmlrunner (1.7.7) for python3 and now I do get the output directly on the terminal.","Q_Score":0,"Tags":"python,linux,unit-testing","A_Id":46359839,"CreationDate":"2017-09-21T14:34:00.000","Title":"No print to stdout when running xmlrunner in python","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am having trouble installing any PIP module. \nSteps\/Precautions I have taken: \n\nI uninstalled Python and downloaded the most recent Python 3.6.2.\nPIP seems to be installed already C:\\Users\\Danc2>C:\\Users\\Danc2\\AppData\\Local\\Programs\\Python\\Python36-32\\scripts\\pip3.6 (also included are files: pip, pip3).\npip install pyperclip returns \n\n\n'pip' is not recognized as an internal or external command, operable program or batch file.\n\nIn using many different forums and typing commands into CMD I come up with results like: \"'pip' is not recognized as an internal or external command,\noperable program or batch file.\" \nWhen trying to refer to my folder location: \"C:\\Users\\Danc2>C:\\Users\\Danc2>C:\\Users\\Danc2\\AppData\\Local\\Programs\\Python\\Python36-32\\scripts\nAccess is denied.\"\n\nSorry for the common question, but I just cannot figure it out for my individual problem. I appreciate any kind effort to help.\nDaniel.","AnswerCount":3,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":147,"Q_Id":46353305,"Users Score":0,"Answer":"I think you should restart your computer. If that doesn't work, go to Control Panel -> System -> Advanced Settings -> Environment Variables.\nIn the system variables you should go to Path and add the folder containing the pip.exe to your path.","Q_Score":0,"Tags":"python,pip,pyperclip","A_Id":46353348,"CreationDate":"2017-09-21T21:17:00.000","Title":"Installing PIP Modules","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am having trouble installing any PIP module. \nSteps\/Precautions I have taken: \n\nI uninstalled Python and downloaded the most recent Python 3.6.2.\nPIP seems to be installed already C:\\Users\\Danc2>C:\\Users\\Danc2\\AppData\\Local\\Programs\\Python\\Python36-32\\scripts\\pip3.6 (also included are files: pip, pip3).\npip install pyperclip returns \n\n\n'pip' is not recognized as an internal or external command, operable program or batch file.\n\nIn using many different forums and typing commands into CMD I come up with results like: \"'pip' is not recognized as an internal or external command,\noperable program or batch file.\" \nWhen trying to refer to my folder location: \"C:\\Users\\Danc2>C:\\Users\\Danc2>C:\\Users\\Danc2\\AppData\\Local\\Programs\\Python\\Python36-32\\scripts\nAccess is denied.\"\n\nSorry for the common question, but I just cannot figure it out for my individual problem. I appreciate any kind effort to help.\nDaniel.","AnswerCount":3,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":147,"Q_Id":46353305,"Users Score":0,"Answer":"If your Python installation works at all with the command line, then replacing pip with python -m pip in the command line is likely to fix the issue for you.","Q_Score":0,"Tags":"python,pip,pyperclip","A_Id":46353369,"CreationDate":"2017-09-21T21:17:00.000","Title":"Installing PIP Modules","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm using Visual Studio Code (Version 1.16.1) with Python Extension (Don Jayamanne version 0.7.0).  As I finish debugging a script, I consistently get an error - \"Debug adapter process has terminated unexpectedly\".  This happens regardless of execution process (Integrated or External terminal\/console).\nI'm an instructor for a Python class and all of my students are having to clear this error every time they debug.  I and my students would appreciate any help with this.\nThanks,\nJohn","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":613,"Q_Id":46354897,"Users Score":0,"Answer":"in my case removing .vscode folder in my user folder and reinstalling debugger extension helped","Q_Score":1,"Tags":"python","A_Id":48916162,"CreationDate":"2017-09-21T23:59:00.000","Title":"Debug adapter process has terminated unexpectedly","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have to do some work with a company with security restrictions on their computers.\nI need to set Python2.7 virtualenv on their Windows10 machine but can't add python to Windows path. I installed Python through the Windows Software Centre. The interpreter is in usual C:\\Python27\\python.exe but it is not added to Windows path. When I run python in CMD it is not recognizable although C:\\Python27\\python opens the interpreter. \nThe problem is that to add it to Windows path I need admin privileges. It is simply not possible. I know the obvious answer is to contact admin but again it is not an option. \nSo the problem is, having this setup I need to install virtualenv, inside create all my environment and work on it. \nI can't find the way to do it without Python in the path.","AnswerCount":2,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":4036,"Q_Id":46363175,"Users Score":1,"Answer":"You could run: SET PATH=%PATH%;C:\\Python27\\ from a command prompt and it will add the python to path temporary  (i.e will be gone when the command prompt is closed)","Q_Score":0,"Tags":"python,windows,virtualenv","A_Id":46363515,"CreationDate":"2017-09-22T11:00:00.000","Title":"working with virtualenv without Python in Windows path","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I tried installing z3 theorem prover.\nI am using Ubuntu 16.04.\nAnd I am using Python 2.7.12\nI did the installation in two ways:\n\nI used sudo apt-get install z3\nBut when I tried to import z3 by opening python from terminal using from z3 import * and also using import z3 as z I got an error saying No Module named z3\nI used\npython scripts\/mk_make.py\ncd build\nmake\nsudo make install\n\nand also added build\/python to PYTHONPATH and build to LD_LIBRARY_PATH but I got the same problem when i tried to import z3 using the same way.\nNow I tried running examples.py\nwhich is the folder build\/python\nAnd lo!!! No Error!!!\nI also tried running other example files and I didn't get any error for them too.\nCan anybody help me with the problem why I cannot import z3 when I open Python from terminal or any other folder outside of build\/python?\nEDIT:\nI found out that I have to do adding the folders to the path every time I open a terminal outside of build\/python","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":1158,"Q_Id":46369458,"Users Score":1,"Answer":"I found out that I have to add the paths everytime I open a new terminal window. Then only z3 can be imported from anywhere.","Q_Score":1,"Tags":"python,python-2.7,z3,z3py","A_Id":47165922,"CreationDate":"2017-09-22T16:38:00.000","Title":"Cannot import z3 in python-2.7.12 in ubuntu even after installation","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to understand the way Gevent\/Greenlet chooses the next greenlet to be run. Threads use the OS Scheduler. Go Runtime uses 2 hierarchical queues. \nBy default, Gevent uses libevent to its plumbling. But how do libevent chooses the next greenlet to be ran, if many are ready to?\nIs it random?\nI already had read their docs and had a sight on the sourcecode. Still do not know.\nUpdated: Text changed to recognize that Gevent uses libevent. The question still applies over libevent.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":174,"Q_Id":46384607,"Users Score":0,"Answer":"It's underlying dispatch model, is the event loop in libevent, which uses the event base, which monitors for the different events, and reacts to them accordiningly, then from what I gleamed , it will take the greenlets do some fuckery with semaphores, and then dispatch it onto libevent.","Q_Score":0,"Tags":"python,concurrency,gevent,cpython,greenlets","A_Id":46387137,"CreationDate":"2017-09-23T21:52:00.000","Title":"How do libevent chooses the next Gevent greenlet to run?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have tasks A -> B -> C in Airflow and when I run the DAG and all complete with success, I'd like to be able to clear B alone (while leaving C marked as success).  B clears and gets put into the 'no_status' state but then when I try to re-run B, nothing happens.  I've tried --ignore_dependencies, --ignore_depends_on_past and --force but to no avail.  B seems to only re-run if C is also cleared and then everything re-runs as expected.\nThe reason why I'd like to be able re-run B specifically without changing the pipeline is that some of B's external inputs may change slightly (file changed, or tweak) and I'd like to run it and evaluate it's output before restarting the downstream tasks (to mitigate any potential interruption).","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":2112,"Q_Id":46397373,"Users Score":0,"Answer":"In the UI, when you clear a instance task, the downstream case is checked by default.\nIf you unchecked it, it will clear only this one and not re-run the downstream tasks","Q_Score":2,"Tags":"python,airflow","A_Id":46435566,"CreationDate":"2017-09-25T03:55:00.000","Title":"Airflow force re-run of upstream task when cleared even though downstream if marked success","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a core set of bash aliases defined in my .bash_profile (Mac). But when I activate a pipenv with pipenv shell, my aliases don't work and the bash alias command returns nothing. \nIs there a configuration step needed to spawn pipenv shells that inherit bash aliases from the parent shell?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":3809,"Q_Id":46416052,"Users Score":20,"Answer":"Aliases are never inherited. .bash_profile is only sourced for login shells, and pipenv apparently creates a nonlogin interactive shell. Aliases should be defined in .bashrc, and on a Mac (where terminal emulators starts login shells by default), add [[ -f ~\/.bashrc ]] && source ~\/.bashrc to the end of your .bash_profile.","Q_Score":14,"Tags":"python,bash,pipenv","A_Id":46416282,"CreationDate":"2017-09-26T00:25:00.000","Title":"pipenv and bash aliases","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Currently, I am running two versions of python on Mac. The native one (2.7.10) (\/usr\/bin\/python), and another one, which has been downloaded via home-brew (2.7.14).\nI want to download two versions of pip and download packages depending on the python version I want to use.\nIs this possible?","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":2371,"Q_Id":46431306,"Users Score":0,"Answer":"It's worth mentioning (for Windows Users), once you have multiple versions of Python installed, you can easily manage packages for each specific version by calling pip<major>.<minor> from a cmd window.\nfor example, I have Python 2.7, 3.6 and 3.7 currently installed, and I can manage my packages for each installation using pip2.7, pip3.6 and pip3.7 respectively ...\nOn Windows 10, $ pip3.7 install <module> works for me - haven't tested it with venv instances yet though","Q_Score":1,"Tags":"python,macos,python-2.7,pip,python-2.x","A_Id":54506145,"CreationDate":"2017-09-26T16:12:00.000","Title":"How to install pip associated to different versions of Python","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a script that i run every day and want to make a schedule for it, i have already tried a batch file with: \nstart C:\\Users\\name\\Miniconda3\\python.exe C:\\script.py\nAnd im able to run some basic python commands in it, the problem is that my actual script uses some libraries that were installed with Anaconda, and im unable to use them in the script since Anaconda will not load.\nIm working on windows and can't find a way to start Anaconda and run my script there automatically every day.","AnswerCount":4,"Available Count":2,"Score":1.0,"is_accepted":false,"ViewCount":27782,"Q_Id":46437863,"Users Score":7,"Answer":"I had a similar problem a few days ago. \nWhat I discovered is that anaconda prompt is nothing but your usual cmd prompt after running an 'activate.bat' script which is located in the anaconda 'Scripts' folder. \nSo to run your python scripts in anaconda all you need to do is write 2 lines in a batch file. (Open notepad and write the lines mentioned below. Save the file with .bat extension)\n\ncall C:\\....path to anaconda3\\Scripts\\activate.bat\ncall python C:\\path to your script\\Script.py\n\nThen you schedule this batch file to run as you wish and it will run without problems.","Q_Score":26,"Tags":"python,batch-file,scheduled-tasks,anaconda,conda","A_Id":57192970,"CreationDate":"2017-09-27T00:54:00.000","Title":"Schedule a Python script via batch on windows (using Anaconda)","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a script that i run every day and want to make a schedule for it, i have already tried a batch file with: \nstart C:\\Users\\name\\Miniconda3\\python.exe C:\\script.py\nAnd im able to run some basic python commands in it, the problem is that my actual script uses some libraries that were installed with Anaconda, and im unable to use them in the script since Anaconda will not load.\nIm working on windows and can't find a way to start Anaconda and run my script there automatically every day.","AnswerCount":4,"Available Count":2,"Score":0.049958375,"is_accepted":false,"ViewCount":27782,"Q_Id":46437863,"Users Score":1,"Answer":"Found a solution, i copied the \"activate.bat\" file in \"C:\\Users\\yo\\Miniconda3\\Scripts\" and renamed it as schedule.bat and added my script (copy pasted it) on the end of the file.\nThen i can schedule a task on windows that executes schedule.bat everyday","Q_Score":26,"Tags":"python,batch-file,scheduled-tasks,anaconda,conda","A_Id":46438132,"CreationDate":"2017-09-27T00:54:00.000","Title":"Schedule a Python script via batch on windows (using Anaconda)","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am using Jupyter Notebooks (through Anaconda) on a Mac OS X Sierra. Now I would like to access a notebook saved in my iCloud Drive. However, I have been unable to find a way to access iCloud via the Juypter interface. I can of course upload a file with the \"Upload\" button, but not access the file sitting in my iCloud directly, which I would much prefer. How can I do that?","AnswerCount":5,"Available Count":2,"Score":0.1194272985,"is_accepted":false,"ViewCount":8894,"Q_Id":46444903,"Users Score":3,"Answer":"Mac: Access your iCloud Documents folder with Jupyter Notebook or JupyterLab\nHi!\nIn my case what I do it's:\n\nOpen a Terminal in Your Mac\nType:\n\n\ncd ~\/Library\/Mobile*Documents\/com~apple~CloudDocs\/Documents\n\nVerify you are at the right folder. Type\n\n\npwd\n\nOpen Jupyter Notebook or JupyterLab. Type:\n\n\njupyter notebook\n\n\nor type:\n\njupyter lab\n\n\nYour browser will open a Jupyter Notebook (\/Lab) and you'll see your iCloud Documents Folder and all the subfolders included on it","Q_Score":7,"Tags":"python,jupyter-notebook,icloud","A_Id":57729567,"CreationDate":"2017-09-27T09:58:00.000","Title":"Access iCloud Drive in Jupyter Notebook","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am using Jupyter Notebooks (through Anaconda) on a Mac OS X Sierra. Now I would like to access a notebook saved in my iCloud Drive. However, I have been unable to find a way to access iCloud via the Juypter interface. I can of course upload a file with the \"Upload\" button, but not access the file sitting in my iCloud directly, which I would much prefer. How can I do that?","AnswerCount":5,"Available Count":2,"Score":1.0,"is_accepted":false,"ViewCount":8894,"Q_Id":46444903,"Users Score":12,"Answer":"While someone can launch the Jupyter Lab or Jupyter Notebook software from the iCloud directory, as described in the accepted response, this will need to be done each and every time you want to access Jupyter notebooks within iCloud. Instead I prefer to create a symbolic link (symlink...a shortcut) to my iCloud folder, in my home directory. This will always be present. In doing this I can launch Jupyter Lab or a Jupyter Notebook from any folder or from Anaconda Navigator and I will always see a \"folder\" to iCloud.\nTo do this you need to open a Terminal and copy and paste the statement below into the Terminal window and hit return:\nln -s ~\/Library\/Mobile*Documents\/com~apple~CloudDocs\/ iCloud\nAfter creating this symlink, there will always be an iCloud folder that you can browse in your home directory. You can use whatever name you want by replacing the \"iCloud\" at the on the statement above with your own name.","Q_Score":7,"Tags":"python,jupyter-notebook,icloud","A_Id":59936184,"CreationDate":"2017-09-27T09:58:00.000","Title":"Access iCloud Drive in Jupyter Notebook","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"When I start debugging (hitting the bug button to top-right), it gets connected and below message is shown: \n\nConnected to pydev debugger (build 172.3968.37)\n\nBut it doesn't stop at break points. Can anyone help me with this problem?\nI am using PyCharm CE on a Mac with python 3.6.2","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":2634,"Q_Id":46481314,"Users Score":0,"Answer":"Possibilities:\n\nAn unhandled exception was raised by code long before we ever got to the code containing a breakpoint. That is, the code which gets executed before the code containing a break-point contains an error.\nThe code containing a break-point is never executed, even when the script runs from start to finish. For example, if the break-point is inside an if-block and the condition of the if-statement is never true, then the breakpoint will never be reached.\nYou are not running the script you think you are running. Look in the upper right corner of the UI. What is the name of the file next to the run button (green triangle)?","Q_Score":4,"Tags":"python-3.x,debugging,pycharm","A_Id":50509969,"CreationDate":"2017-09-29T03:20:00.000","Title":"Debugger doesn't stop at break points","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I plan on using python in the LiClipse IDE to play around with AI. However i require a few libraries. The libraries can be installed with pip. They mention the commands to install and upgrade pip(e.g. python -m pip install -U pip), however I am not sure where I should write this command anymore because it does not work in either the CMD or python shell.\nIs there any condition while using these commands I should think about?\nThank you","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":43,"Q_Id":46487871,"Users Score":0,"Answer":"open cmd\ngoto the D:\\python\\Scripts(Your Installation directory)\nRun The Command  pip install -U pip","Q_Score":0,"Tags":"python","A_Id":46487918,"CreationDate":"2017-09-29T11:29:00.000","Title":"How to (and where) install\/upgrade pip for Python?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm integrating MicroPython into a microcontroller and I want to add a debug step-by-step execution mode to my product (via a connection to a PC).\nThankfully, MicroPython includes a REPL aka Python shell functionality: I can feed it one line at a time and execute.\nI want to use this feature to single-step on the PC-side and send in the lines in the Python script one-by-one. \nIs there ANY difference, besides possibly timing, between running a Python script one line at a time vs python my_script.py?","AnswerCount":3,"Available Count":1,"Score":0.0665680765,"is_accepted":false,"ViewCount":1057,"Q_Id":46495647,"Users Score":1,"Answer":"I don't know whether MicroPython has compile() and exec() built-in.\nBut when embeded Python has them and when MCU has enough RAM, then I do the following:\n\nSend a line to embeded shell to start a creation of variable with multiline string.\n'_code = \"\"\"\\'\nSend the code I wish executed (line by line or however)\nClose the multiline string with \"\"\"\nSend exec command to run the transfered code stored in the variable on MCU and pick up the output.\n\nIf your RAM is small and you cannot transfer whole code at once, you should transfer it in blocks that would be executed. Like functions, loops, etc.\nIf you can compile bytecode for MicroPython on a PC, then you should be able to transfer it and prepare it for execution. This would use a lot less of RAM.\nBut whether you can inject the raw bytecode into shell and run it depends on how much MicroPython resembles CPython.\nAnd yep, there are differences. As explained in another answer line by line execution can be tricky. So blocks of code is your best bet.","Q_Score":1,"Tags":"python,micropython","A_Id":46496039,"CreationDate":"2017-09-29T19:22:00.000","Title":"Run Python script line-by-line in shell vs atomically","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a requirement that I need to set up hadoop to save files not just text files it can be image video pdf. And there will be a web application from where user can add files and access files whenever its needed.\nCan it Possible to implement ? also the web application will need to develop by me. Thank You.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":139,"Q_Id":46559124,"Users Score":1,"Answer":"If your application is written in Java, this is easily possible using the DFS Client libraries which can read and write files in HDFS in a very similar way to a standard filesystem. Basically can open an input or output stream and read whatever data you want.\nIf you are planning to use python to build the web application, then you could look at webHDFS, which provides a HTTP based API to put and get files from HDFS.","Q_Score":2,"Tags":"php,python-3.x,hadoop,hdfs,bigdata","A_Id":46566798,"CreationDate":"2017-10-04T07:18:00.000","Title":"Can I access HDFS files from Custom web application","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"\/lib64\/libc.so.6: version `GLIBC_2.22' not found (required by \/var\/task\/pyhull\/_pyhull.so).\nNot able to fix this error on Aws Lambda any help please ?","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":3248,"Q_Id":46568074,"Users Score":0,"Answer":"It was related to Lambda Server lib problem.Solved by making zip in aws ec2 server by installing all python libraries there in ec2","Q_Score":0,"Tags":"python,amazon-web-services,lambda,glibc","A_Id":49010419,"CreationDate":"2017-10-04T14:59:00.000","Title":"\/lib64\/libc.so.6: version `GLIBC_2.22' not found in Aws Lambda Server","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"\/lib64\/libc.so.6: version `GLIBC_2.22' not found (required by \/var\/task\/pyhull\/_pyhull.so).\nNot able to fix this error on Aws Lambda any help please ?","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":3248,"Q_Id":46568074,"Users Score":0,"Answer":"The \/var\/task\/pyhull\/_pyhull.so was linked against GLIBC-2.22 or later.\nYou are running on a system with GLIBC-2.21 or earlier.\nYou must either upgrade your AWS system, or get a different _pyhull.so build.","Q_Score":0,"Tags":"python,amazon-web-services,lambda,glibc","A_Id":46575657,"CreationDate":"2017-10-04T14:59:00.000","Title":"\/lib64\/libc.so.6: version `GLIBC_2.22' not found in Aws Lambda Server","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Setup: Google App Engine application on Python standard environment.\nCurrently, the app uses the NDB library to read\/write from its Datastore. It uses async tasklets for parallel, asynchronous reads from Datastore, and memcache.\nIf I would like to use Firestore as a replacement for Datastore, it seems that I would have to use the Google Cloud Client Library for Python. I believe that the google-cloud lib doesn't support a mechanism like tasklets. But I wonder: Does the lib use a thread-safe cache-mechanism for its requests to the Firestore API, and maybe even GAE's memcache?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":217,"Q_Id":46585670,"Users Score":2,"Answer":"The Cloud Firestore server-side client libraries are not optimized for App Engine Standard. They  don't integrate with a caching solution like GAE's memcache; you'd have to write that layer yourself.","Q_Score":1,"Tags":"google-app-engine,firebase,google-app-engine-python,google-cloud-python,google-cloud-firestore","A_Id":46625646,"CreationDate":"2017-10-05T12:29:00.000","Title":"Does Cloud Python lib in GAE use caching or memcache for access to Cloud Firestore data?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I'm working with a small company currently that stores all of their app data in an AWS Redshift cluster. I have been tasked with doing some data processing and machine learning on the data in that Redshift cluster.\nThe first task I need to do requires some basic transforming of existing data in that cluster into some new tables based on some fairly simple SQL logic. In an MSSQL environment, I would simply put all the logic into a parameterized stored procedure and schedule it via SQL Server Agent Jobs. However, sprocs don't appear to be a thing in Redshift. How would I go about creating a SQL job and scheduling it to run nightly (for example) in an AWS environment? \nThe other task I have involves developing a machine learning model (in Python) and scoring records in that Redshift database. What's the best way to host my python logic and do the data processing if the plan is to pull data from that Redshift cluster, score it, and then insert it into a new table on the same cluster? It seems like I could spin up an EC2 instance, host my python scripts on there, do the processing on there as well, and schedule the scripts to run via cron?\nI see tons of AWS (and non-AWS) products that look like they might be relevant (AWS Glue\/Data Pipeline\/EMR), but there's so many that I'm a little overwhelmed. Thanks in advance for the assistance!","AnswerCount":3,"Available Count":1,"Score":0.0665680765,"is_accepted":false,"ViewCount":2154,"Q_Id":46618762,"Users Score":1,"Answer":"The 2 options for running ETL on Redshift\n\nCreate some \"create table as\" type SQL, which will take your source\ntables as input and generate your target (transformed table)\nDo the transformation outside of the database using an ETL tool. For\nexample EMR or Glue.\n\nGenerally, in an MPP environment such as Redshift, the best practice is to push the ETL to the powerful database (i.e. option 1). \nOnly consider taking the ETL outside of Redshift (option 2) where SQL is not the ideal tool for the transformation, or the transformation is likely to take a huge amount of compute resource.\nThere is no inbuilt scheduling or orchestration tool. Apache Airflow is a good option if you need something more full featured than cron jobs.","Q_Score":1,"Tags":"python,database,amazon-web-services,amazon-redshift","A_Id":46640656,"CreationDate":"2017-10-07T09:41:00.000","Title":"AWS Redshift Data Processing","Data Science and Machine Learning":0,"Database and SQL":1,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I'm specifically interested in avoiding conflicts when multiple users upload (upload_file) slightly different versions of the same python file or zip contents.\nIt would seem this is not really a supported use case as the worker process is long-running and subject to the environment changes\/additions of others.\nI like the library for easy, on-demand local\/remote context switching, so would appreciate any insight on what options we might have, even if it means some seamless deploy-like step for user-specific worker processes.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":77,"Q_Id":46627188,"Users Score":0,"Answer":"Usually the solution to having different user environments is to launch and destroy networks of different Dask workers\/schedulers on the fly on top of some other job scheduler like Kubernetes, Marathon, or Yarn.\nIf you need to reuse the same set of dask workers then you could also be careful about specifying the workers= keyword consistently, but this would be error prone.","Q_Score":1,"Tags":"python,dask,dask-distributed","A_Id":46631210,"CreationDate":"2017-10-08T03:15:00.000","Title":"What options exist for segregating python environments in a mult-user dask.distributed cluster?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"how do I write\/execute a Python script full screen at the terminal.\nI want to write a small Programm which shoud be shown like \"vim\", \"sl\", or \"nano\".","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":675,"Q_Id":46636125,"Users Score":0,"Answer":"As fas as I can understand from your question, you can make the terminal to be fullscreen by pressing F11 (at least in Ubuntu)","Q_Score":0,"Tags":"python,terminal","A_Id":46636156,"CreationDate":"2017-10-08T21:13:00.000","Title":"Execute Python script in terminal fullscreen","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm currently writing some integration tests which should run on different physical machines and VMs with different OS.\nFor one type of test I have to find out if an nvidia-graphic card is installed on the running machine. I don't need any other information - only the vendor name (and it would be OK if I only knew if it is an NVIDIA graphic card or not - not interested in other vendors).\nI can only use the python standard lib so I think the best way is to use subprocesses and using the shell.\nAre there some commands for Windows(Win10x64) and Linux(Fedora, CentOS, SUSE) (without installing any tools or external libs) to find out the gpu vendor?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":794,"Q_Id":46641080,"Users Score":3,"Answer":"Following solution:\nOn Linux I'm using lsmod (or \/sbin\/lsmod; thanks to n00dl3) to see any occurence of \"nvidia\" and on Windows I'm using wmic path win32_VideoController get name to get some gpu information.","Q_Score":1,"Tags":"python,linux,windows,command,gpu","A_Id":46664350,"CreationDate":"2017-10-09T07:39:00.000","Title":"Getting gpu vendor name on windows and linux","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a python zosftplib function call that submits a MVS job successfully, but it does not recognize that the job completed and it does not receive the JES output from the job. I can successfully make the MVS FTP connection and can upload and download files.\nThe code looks like this:\njob = Myzftp.submit_wait_job(jcl)\nThe call eventually displays the following error message.\nFile \"C:\\Python27\\lib\\site-packages\\zosftplib.py\", line 410, in submit_wait_job %(msg, resp))\nZftpError: 'submit_wait_job error: 550 JesPutGet aborted, job not found (last response:250 Transfer completed successfully.)'\nAny suggestions would be helpful on how I can resolve this.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":694,"Q_Id":46648039,"Users Score":0,"Answer":"Working with MVS FTP and JES can be very specific. For example my MVS ID was MVSIDD. My jobcard had a jobname of MVSIDDXY. So the submit_wait_job() function would submit the job correctly and it would run successfully. The problem came with returning the JES output back to FTP. It was expecting a jobname with my id and a single character not two. By changing the jobname in the jobcard to MVSIDDX the function worked as expected and waited until the job was over and then returned all the JES output with it.","Q_Score":0,"Tags":"python,zos,mvs","A_Id":46654808,"CreationDate":"2017-10-09T13:46:00.000","Title":"zosftplib submit_wait_job(jcl) function does not receive JES output","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I have python webjobs running on Azure. There are times when the script hangs because of which I need to force restart it so next iteration can pick it up.\nHow do I configure force stopping a webjob if running longer than 1 hour? Basically I want to mimic task scheduler's behavior.\nMy files on the webjob:\n\nrun.cmd\nD:\\home\\Python35\\python.exe main.py\nmain.py\njust another python file\nsettings.job\n{\"is_singleton\":true}\n\nAt a given time, I want only 1 instance of the job running.\nEdit (Answer): As a workaround, I changed continuous webjob to triggered one. And added this in app setting:\n\nWEBJOBS_IDLE_TIMEOUT = 120\n\nI'm printing something on the console every now and then. If no CPU activity is detected for 2 mins, the job will be aborted.","AnswerCount":2,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":431,"Q_Id":46657070,"Users Score":1,"Answer":"You might want a second webjob that you can incorporate a healthcheck and restart the primary webjob if it detects no activity in your processes.\nAnother idea could be to use azure automation and have a powershell script that just restarts the webjob every hour.","Q_Score":1,"Tags":"python,azure,azure-webjobs","A_Id":46657105,"CreationDate":"2017-10-10T00:51:00.000","Title":"Azure WebJob: Force stop if running longer than X mins","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I have just spent 2 days trying to build Tensorflow from source, and finally succeeded when I realized that sudo pip (even with the -H flag) was not finding my anaconda pip, but instead finding a pip installed with apt.  Running, then, sudo -H ~\/anaconda3\/bin\/pip ... fixed my problem.\nIn order to avoid this kind of issue ever again (I had several issues in this process with the \"wrong\" python being used), is it possible for me to completely remove python from my system, keeping only Anaconda?  Is it advisable?","AnswerCount":2,"Available Count":1,"Score":0.2913126125,"is_accepted":false,"ViewCount":417,"Q_Id":46663950,"Users Score":3,"Answer":"This is not just a Ubuntu issue but also a linux world wide issue. The system python is at the core of apt-get and yum package managers. Also the modern grub is based on python so removing it can make your machine unbootable.\nIn short, this will affect RHEL related distributions (CentOS\/Fedora) and Debian related distributions (Debian\/Ubuntu).","Q_Score":1,"Tags":"python,anaconda,ubuntu-16.04","A_Id":46665023,"CreationDate":"2017-10-10T10:02:00.000","Title":"Ubuntu completely remove python that is not Anaconda","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Lets say I have directories like:\nfoo\/bar\/\nbar is chmod 777 and foo is 000.\nWhen I call os.path.isdir('foo\/bar') it returns just False, without any Permission Denied Exception or anything, why is it like that? Shouldn't it return True?","AnswerCount":3,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":1262,"Q_Id":46666941,"Users Score":3,"Answer":"If you are not root then you cannot access foo. Therefore you can't check if foo\/bar exists and it returns False because it cannot find a directory with that name (as it cannot access the parent directory).","Q_Score":7,"Tags":"python,unix","A_Id":46667023,"CreationDate":"2017-10-10T12:34:00.000","Title":"os.path.isdir() returns false on unaccessible, but existing directory","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Lets say I have directories like:\nfoo\/bar\/\nbar is chmod 777 and foo is 000.\nWhen I call os.path.isdir('foo\/bar') it returns just False, without any Permission Denied Exception or anything, why is it like that? Shouldn't it return True?","AnswerCount":3,"Available Count":2,"Score":0.1325487884,"is_accepted":false,"ViewCount":1262,"Q_Id":46666941,"Users Score":2,"Answer":"os.path.isdir can return True or False, but cannot raise an exception.\nSo if the directory cannot be accessed (because parent directory doesn't have traversing rights), it returns False.\nIf you want an exception, try using os.chdir or os.listdir that are designed to raise exceptions.","Q_Score":7,"Tags":"python,unix","A_Id":46666984,"CreationDate":"2017-10-10T12:34:00.000","Title":"os.path.isdir() returns false on unaccessible, but existing directory","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"How can I identify a remote host OS (Unix\/Windows) using python ? One solution I found is to check whether the port22 is open but came to know that some Windows hosts also having Port 22 open but connections refused. Please let me know the efficient way to do the same. Thanks in advance.","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":3377,"Q_Id":46669453,"Users Score":1,"Answer":"For security reasons, most operating systems do not advertise information over the network.  While tools such as nmap can deduce the OS running on a remote system by scanning ports over the network the only way to reliably know the OS is to login to the system.  In many cases the OS will be reported as part of the login process so establishing a connection over the network will suffice to determine the OS.  Running \"uname -a\" on the remote system will also retrieve the OS type on linux systems.\nThis will retrieve the welcome string from HOST which usually includes the OS type.  Substitute a valid user name for UNAME and host name for HOST.\n\n    #!\/usr\/bin\/env python3\n\n    import sys\n    import subprocess\n\n    CMD=\"uname -a\"\n\n    conn = subprocess.Popen([\"ssh\", \"UNAME@HOST\", CMD],\n            shell=False,\n            stdout=subprocess.PIPE,\n            stderr=subprocess.PIPE)\n    res = conn.stdout.readlines()\n    print(res)","Q_Score":2,"Tags":"python,linux,windows,remote-access,remote-server","A_Id":46670748,"CreationDate":"2017-10-10T14:36:00.000","Title":"Efficient way of finding remote host's operating system using Python","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"This problem is that when I run my python programs through python launcher python launcher tries to run it in python 2.7, causing the print command(?) to have brackets around them and numerous other broken things.\nI downloaded Python Launcher with python 3.6 from the python.org website.\nWhen opening Python Launcher > Preferences, the 'interpreter' drop-down field has the following options:\n\/usr\/local\/bin\/pythonw\n\/usr\/local\/bin\/python\n\/usr\/bin\/pythonw\n\/usr\/bin\/python\n\/sw\/bin\/pythonw\nI don't know what the difference between python or pythonw is, or even what any of them mean, but no matter which one I select it always tries to run in python 2.7.\nWhat makes it even more baffling to me is when choosing to open my script in IDLE it says right at the top: (python 3.6.3) and runs a window called 'Python 3.6.3 shell'\nHow can I get the program to run using python 3.6.3 through Python Launcher?","AnswerCount":2,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":7380,"Q_Id":46671386,"Users Score":1,"Answer":"None of the above worked for me with Python 3.7 installed on OS X Mojave. But simply changing the Interpreter to \"python3\" in the Python Launcher preferences solved the problem.","Q_Score":2,"Tags":"python,macos,python-2.7,python-3.x","A_Id":57103379,"CreationDate":"2017-10-10T16:16:00.000","Title":"Python Launcher preferences in mac OSX not allowing selection of python 3.6 interpreter","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have seen many examples of dockerfiles with conda commands in them. And there are pre-build anaconda and miniconda containers. I must be missing something. \nDoesn't docker REPLACE virtualenv and conda? Shouldn't I have all of my dependencies right in my dockerfile? I don't understand what I gain from adding anaconda here. In fact it seems like it makes my container unnecessarily bigger if I have to pull a miniconda container if Im not using all of miniconda's included modules.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":7393,"Q_Id":46678454,"Users Score":11,"Answer":"Docker does not replace anything. It is simply one way to do things.\nNo, you should not have all of your dependencies right in your Dockerfile. I, for one, will be running pip install from a virtualenv without ever touching Docker\/*conda unless I have a good reason. Your lack of requirements.txt is not a good reason :)\nConda came out in 2012 - well before Docker. Since Python has such a strong following in the non-programmer community, I rarely expect intelligible code, much less some type of DevOps ability. Conda was the perfect solution for this group.\nWith Docker, you can have a functional Docker environment with FROM python:xx, COPY . \/workdir, and RUN pip install -r requirements.txt (supposing you're using that file *ahem), but your developers will probably need a volume so they can work (so they need to know --volume. Also, if you're running Django you'll need ports configured (now they need --port and you need EXPOSE). Oh, also Django might need a database. Now you need another container and you're writing a docker-compose file.\nBut consider the following, from almost all of my professional (DevOps) experience IF you just include requirements.txt-\n\nI can use that file in my Docker container\nThe requirements are all in one place\nI can develop on my local with a venv if I want\nTravis can install from requirements.txt and test on multiple versions without using Tox\nSetuptools handles that automatically, so my thing works with pip\nI can reuse those Dockerfiles (or parts) with ECS, Kubernetes, etc\nI can deploy to EC2 without using Docker\nI can install the package locally via pip\n\nHTH - don't get too locked in to one piece of technology!","Q_Score":18,"Tags":"python,docker,containers,anaconda,conda","A_Id":46678633,"CreationDate":"2017-10-11T01:40:00.000","Title":"what is the purpose of conda inside a container?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm trying to install pip for python 3.6 on windows 10. I run get-pip.py. when I try to use pip on terminal I get an error message Pip command is not recognized. \nI already add C:\\Python36\\Scripts to the environmental variable. \nIs there anything I missed ?","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":131,"Q_Id":46690417,"Users Score":0,"Answer":"Solved :\nthe problem is that  python wasn't install in the right place (C:\\python) but just for one user. \nI uninstall and re-install python using \"custom\" configuration.","Q_Score":0,"Tags":"python,pip,windows-10","A_Id":46693783,"CreationDate":"2017-10-11T14:09:00.000","Title":"unable to use pip even after add to environmental variable","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"After upgrading to macOS high sierra, vim began to crash with the plugins need python. I am getting the below error whenever i activated a python plugin. For example, i use tern for vim for javascript files. When i activate this plugin, vim opens successfully but it crashes when i open a javascript file.\nI have reinstall vim and python with brew. It did not work. I have also build vim from source, it did not work either.\n\nVim: Caught deadly signal SEGV","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":316,"Q_Id":46695289,"Users Score":0,"Answer":"I had vim crashing after a brew upgrade which also upgraded the python version. Reinstallation did not help, but reinstalling all the plugins (and therefore updating them) did help.\nEspecially rebuilding YouCompleteMe was key.","Q_Score":2,"Tags":"python,vim,macos-high-sierra","A_Id":49448621,"CreationDate":"2017-10-11T18:35:00.000","Title":"vim with python plugins crashes on macOS high sierra","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am working on a Windows machine with admin rights and Python 2.7. I would like to use my locally downloaded python to call a script on the shared drive from the command line.\nUnfortunately, this is not working\nC:\\python27\\python.exe net use S:file_path\\python_script.py\nWhat is the right way to call a shared python script but run it with a local copy of python?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":5274,"Q_Id":46711553,"Users Score":2,"Answer":"Try using the the \\\\ after the mapped drive letter. I have a shared drive mapped locally on my windows machine under Z. When I run my local python interpreter and give the above shared path, it works as expected.\nFor your example, it should be:\nC:\\path\\to\\python\\python.exe s:\\\\file_path\\python_script.py\nMy example\nC:\\Users\\david.mcmahon>python z:\\\\Test\\hooks\\my_app.py\nRunning from shared drive..\nHope this helps.","Q_Score":0,"Tags":"python-2.7,command-line","A_Id":46711822,"CreationDate":"2017-10-12T13:58:00.000","Title":"Use local python to run python script from shared drive","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a Python Script, which uses win32com.client.dispatch and redemption in order to connect to an instance of Outlook and harvest some data from a public folder. \nWhen I execute this script on command line it works just fine.\nAdding it as a scheduled task, it appears to get hung at the line Outlook = win32com\nI added Event Log statements along the way to see where it is getting hung, other than that I don't have much in the way of error logs (since it doesnt actually fail) \nIs there any sort of security settings I should be concerned about or anything I am not thinking of? Everything works fine with a standard python call in the CMD.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":596,"Q_Id":46712780,"Users Score":0,"Answer":"Scheduler runs as a service, and office apps (Outlook included) should nto be used in a service.","Q_Score":0,"Tags":"python,outlook,win32com,outlook-redemption","A_Id":46713942,"CreationDate":"2017-10-12T14:55:00.000","Title":"Python - Win32Com Client Dispatch Hanging as Scheduled Tasks","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have created a single Pool (size Standard_D32_v3) with a single Job. I have set the pool property max_tasks_per_node=32.\nI then have a list which contains 27000 objects.\nSince I cannot add more than 100 tasks at a time to a Job, I \"Chunk\" my list so that I have a list of lists, each with 100 tasks.\nFinally, I insert each \"Chunk\" of tasks. \nIn the StartTask, I mount a File Share (Not BLOB), which contains files needed for processing.\nMy File Share has folders: 2012, 2013, 2014, 2015, 2016, 2017.\nI have found that for some reason, Azure Batch is deleting all files & folders except for 2017. This the 2nd time it has happened.\nNo where in my code do I delete from the file share or anywhere else.\nI do delete the Pool, Job and Tasks when finished.\nWhat the *&^% is going on?\nUPDATE\nThis is still happening.\nWhen the File Share is mounted, it is done so via Bash as a command passed into the StartTask. Azure portal gives the connection information for the File Share and provides the following CHMOD configuration: dir_mode=0777,file_mode=0777'\nI thought that I would be clever and change CHMOD properties to 444 (read only).\nUnfortunately, I then get a \"Permission Denied\" error. I then changed to 555 (read and execute) and files were once again deleted.\nThis is 100% an issue with Azure Batch. Microsoft does not do any logging what-so-ever (or even allow users to) of File Shares. I was hoping to see delete requests\/operations and from which IP and time the request originated, but alas, it is impossible...","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":136,"Q_Id":46719690,"Users Score":0,"Answer":"A fix was deployed to all Azure regions on 2017-10-19 that should prevent this behavior from happening. You will need to redeploy your pool to get this fix - if you've already mounted something under $AZ_BATCH_NODE_ROOT_DIR, then it is recommended to remotely login to the node and unmount the device first prior to deleting the pool.\nOn a side note: it is not recommended to mount any resource under a task directory. Because task directories are cleaned up when deleted, this can lead to deletion of mounted resources.","Q_Score":0,"Tags":"python,azure-batch","A_Id":46853245,"CreationDate":"2017-10-12T22:13:00.000","Title":"Azure Batch is deleting files from File Share","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I've constructed a python script python_script.py in Linux. Is there a way to do a cron job which will be compatible with Linux and Windows. In fact, even tough I have implemented this script in Linux, it will be run under a cron job in Windows.\nOtherwise, assume the script works well on Linux and Windows. How could we create an automatic task on Windows (similar to a cron job on Linux)?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":400,"Q_Id":46721382,"Users Score":0,"Answer":"Create an automatic task using scheduler in windows.create a bat file to run the Python script and schedule that ask from the windows scheduler.hope this helps","Q_Score":0,"Tags":"python,excel","A_Id":46721674,"CreationDate":"2017-10-13T02:00:00.000","Title":"Cron job which will work under Linux and Windows","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am testing out a very basic Pub\/Sub subscription. I have the push endpoint set to an App I have deployed through a Python Flex service in App Engine. The service is in a project with Identity-Aware Proxy enabled. The IAP is configured to allow through users authenticated with our domain.\nI do not see any of the push requests being processed by my app.\nI turned off the IAP protection and then I see that the requests are processed. I turn it back on and they are no longer processed.\nI had similar issues with IAP when trying to get a Cron service running; that issue resolved itself after I deployed a new test app in the same project.\nHas anyone had success with configuring a push subscription through IAP? I also experimented with putting different service accounts on the IAP access list and none of them worked.","AnswerCount":2,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":890,"Q_Id":46729915,"Users Score":1,"Answer":"I had a pretty similar issue - a GAE 2nd G standard application in project A, which is wired under IAP, that cannot receive the pushed pub\/sub message from project B.\nMy workaround is: \n\nSetup Cloud Function (HTTP triggered) in project A;\nSetup the subscription of project B Pub\/Sub topic to push the message to above Cloud Function endpoint;\nThe above Cloud Function works like a proxy to filter (needed based on my case, ymmv) and forwards the Pub\/Sub message in a http request to the GAE app;\nSince the Cloud Function is within same project with the GAE app, there is only needed to add the IAP authentication for above http request (which fetches the token assigned from the specific SA).\nThere should be a project A's SA setup in Project B IAM, which may have at least Pub\/Sub Subscriber and Pub\/Sub Viewer roles.\n\nHope this could be an option for your case.","Q_Score":2,"Tags":"python,google-app-engine,push,publish-subscribe,google-iap","A_Id":59740146,"CreationDate":"2017-10-13T12:25:00.000","Title":"Google Pub\/Sub push subscription into IAP-protected App Engine","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I'm running into a performance issue with Google Cloud Bigtable Python Client. I'm working on a flask API that writes to and reads from a GCP Bigtable instance. The API uses the python client to communicate with Bigtable, and was deployed to GCP App Engine flexible environment.\nUnder low traffic, the API works fine. However during a load test, the endpoints that reads and writes to Bigtable suffers a huge performance decrease compare to a similar endpoint that doesn't communicate with Bigtable. Also, a large percentage of requests went to the endpoint receives a 502 Bad Gateway, even when health check was turned off in App Engine.\nI'm aware of that the client is currently in Alpha. I wonder if the performance issue is known, or if anyone also ran into the same issue\nUpdate\nI found a documentation from Google stating:\n\nThere are issues with the network connection. Network issues can\n  reduce throughput and cause reads and writes to take longer than\n  usual. In particular, you'll see issues if your clients are not\n  running in the same zone as your Cloud Bigtable cluster.\n\nIn my case, my client is in a different region, by moving it to the same region had a huge increase in performance. However the performance issue still exist, and the recommendation from the documentation is to put client in the same zone as Bigtable.\nI also considered using Container engine or Compute Engine where it is easier to specify the zone, but I want stay with App Engine for its autoscale functionality and managed services.","AnswerCount":1,"Available Count":1,"Score":0.537049567,"is_accepted":false,"ViewCount":503,"Q_Id":46740127,"Users Score":3,"Answer":"Bigtable client take somewhere between 3 ms to 20 ms to complete each request, and because python is single threaded, during that period of time it will just wait until the response comes back. The best solution we found was for any writes, publish the request to Pubsub, then use Dataflow to write to Bigtable. It is significantly faster because publishing a message in Python would take way below 1 ms to complete, and because Dataflow can be set to exactly the same region as Bigtable, and it is easy to parallel, it can write much faster.\nThough it doesn't solve the scenario where you need frequent read or write need to be instantaneous","Q_Score":1,"Tags":"google-app-engine,google-cloud-platform,bigtable,google-cloud-bigtable,google-cloud-python","A_Id":47776406,"CreationDate":"2017-10-14T02:03:00.000","Title":"Google Cloud Bigtable Python Client Performance Issue","Data Science and Machine Learning":0,"Database and SQL":1,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I want to be pull up the name python-3.5, python3.6m, etc.\nWhen I do a \"python --version\" it's not in the correct format and it could be subjected to change. Is there any way to find the names generally in \/usr\/bin\/* folder? Or should I just grep for it and assume that it'll always be in that directory for other users?\nI am using the command \"$pkg-config python-3.6m --ldlibs --cflags\" and I would like to have a dynamic way to find the \"python-3.6m\" in that line so that the user doesn't have to change it every time they run it on a different version of Python.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":101,"Q_Id":46751743,"Users Score":0,"Answer":"You can use 'python-' + sysconfig.get_config_var('LDVERSION'). There are numerous other variables in that module.\nNote that this won't work on non-cpython implementations, but they usually require special cases for building anyway.","Q_Score":0,"Tags":"linux,python-3.x","A_Id":46751883,"CreationDate":"2017-10-15T04:36:00.000","Title":"How can I find the python package name in any linux distribution?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a python script that contains a Linux shell command. I'm using subprocess.check_output. My question is about the faster python method to execute a Linux shell command from python script like os.system().","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":107,"Q_Id":46768006,"Users Score":0,"Answer":"I like subprocess.Popen, but it has troubles (maybe it can't) to deal with '>' ==> unconvenient if you have a '>' in the command line \notherwise subprocess.check_output","Q_Score":1,"Tags":"python,linux,python-2.7","A_Id":46769357,"CreationDate":"2017-10-16T10:21:00.000","Title":"execute linux shell command from python script","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm trying to find a way to log all queries done on a Cassandra from a python code. Specifically logging as they're done executing using a  BatchStatement\nAre there any hooks or callbacks I can use to log this?","AnswerCount":3,"Available Count":1,"Score":0.0665680765,"is_accepted":false,"ViewCount":2113,"Q_Id":46773522,"Users Score":1,"Answer":"Have you considered creating a decorator for your execute or equivalent (e.g. execute_concurrent) that logs the CQL query used for your statement or prepared statement?\nYou can write this in a manner that the CQL query is only logged if the query was executed successfully.","Q_Score":10,"Tags":"python,cassandra,cassandra-python-driver","A_Id":46839220,"CreationDate":"2017-10-16T15:12:00.000","Title":"Logging all queries with cassandra-python-driver","Data Science and Machine Learning":0,"Database and SQL":1,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I try to run a dockerized pants build for a scala project and it fails with an error message \"error in cryptography setup command: Invalid environment marker: python_version < '3' \".\nI haven't manually specified anything to install cryptography. In the documentation of cryptography I could see that it happens either because of pip or setuptools is out of date. I tried to update this as well. But in case of pants I'm not very sure where should I specify this also. I specified this in pants file and in thidparty \"requirements.txt\" file. But no difference . It was working fine but suddenly it failed one day.\nI use the following versions of \nUbuntu -14.04\npython -2.7.4\npants -1.0.0 (tried upgrading to 1.1.0 but no difference)","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":689,"Q_Id":46784908,"Users Score":0,"Answer":"Explicitly mentioning following versions in requirements.txt for pants builds will resolve the issue\npycparser==2.17\ncryptography==2.0.1","Q_Score":0,"Tags":"python,python-2.7,pants","A_Id":47027841,"CreationDate":"2017-10-17T07:38:00.000","Title":"Fails to install cryptography when a pants build is run","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm using python kubernetes 3.0.0 library and kubernetes 1.6.6 on AWS.\nI have pods that can disappear quickly. Sometimes when I try to exec to them I get ApiException Handshake status 500 error status.\nThis is happening with in cluster configuration as well as kube config.\nWhen pod\/container doesn't exist I get 404 error which is reasonable but 500 is Internal Server Error. I don't get any 500 errors in kube-apiserver.log where I do find 404 ones.\nWhat does it mean and can someone point me in the right direction.","AnswerCount":3,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":1730,"Q_Id":46789946,"Users Score":0,"Answer":"For me, The reason for 500 was basically pod unable to pull the image from GCR","Q_Score":2,"Tags":"python,kubernetes","A_Id":69754077,"CreationDate":"2017-10-17T12:16:00.000","Title":"kubectl exec returning `Handshake status 500`","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm using python kubernetes 3.0.0 library and kubernetes 1.6.6 on AWS.\nI have pods that can disappear quickly. Sometimes when I try to exec to them I get ApiException Handshake status 500 error status.\nThis is happening with in cluster configuration as well as kube config.\nWhen pod\/container doesn't exist I get 404 error which is reasonable but 500 is Internal Server Error. I don't get any 500 errors in kube-apiserver.log where I do find 404 ones.\nWhat does it mean and can someone point me in the right direction.","AnswerCount":3,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":1730,"Q_Id":46789946,"Users Score":0,"Answer":"For me the reason was,\nI had two pods, with same label attached, 1 pod was in Evicted state and other was running , i deleted that pod, which was Evicted and issue was fixed","Q_Score":2,"Tags":"python,kubernetes","A_Id":70119831,"CreationDate":"2017-10-17T12:16:00.000","Title":"kubectl exec returning `Handshake status 500`","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a python project and i want to deploy it on an AWS EC2 instance. My project has dependencies to other python libraries and uses programs installed on my machine. What are the alternatives to deploy my project on an AWS EC2 instance?\nFurther details : My project consist on a celery periodic task that uses ffmpeg and blender to create short videos.\nI have checked elastic bean stalk but it seems it is tailored for web apps. I don't know if containerizing my project via docker is a good idea...\nThe manual way and the cheapest way to do it would be :\n1- Launch a spot instance\n2- git clone the project\n3- Install the librairies via pip\n4- Install all dependant programs\n5- Launch periodic task\nI am looking for a more automatic way to do it.\nThanks.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":467,"Q_Id":46791798,"Users Score":2,"Answer":"Beanstalk is certainly an option.   You don't necessarily have to use it for web apps and you can configure all of the dependencies needed via .ebextensions.\nContainerization is usually my go to strategy now.   If you get it working within Docker locally then you have several deployment options and the whole thing gets much easier since you don't have to worry about setting up all the dependencies within the AWS instance. \nOnce you have it running in Docker you could use Beanstalk, ECS or CodeDeploy.","Q_Score":1,"Tags":"python,amazon-web-services,amazon-ec2,deployment,ffmpeg","A_Id":46792730,"CreationDate":"2017-10-17T13:48:00.000","Title":"What are the ways to deploy python code on aws ec2?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"This program listen to Redis queue. If there is data in Redis, worker start to do their jobs. All these jobs have to run simultaneously that's why each worker listen to one particular Redis queue.\nMy question is : Is it common to run more than 20 workers to listen to Redis ? \npython \/usr\/src\/worker1.py\npython \/usr\/src\/worker2.py\npython \/usr\/src\/worker3.py\npython \/usr\/src\/worker4.py\npython \/usr\/src\/worker5.py\n....\n....\npython \/usr\/src\/worker6.py","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":834,"Q_Id":46808342,"Users Score":0,"Answer":"If your worker need to do a long task with data, it's a solution. but each data must be treated by a single worker.\nBy this way, you can easly (without thread,etc..)  distribute your tasks, it's better if your worker doesn't work in the same server","Q_Score":0,"Tags":"python,redis,queue,worker","A_Id":46808422,"CreationDate":"2017-10-18T10:44:00.000","Title":"Is it common to run 20 python workers which uses Redis as Queue ?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"This program listen to Redis queue. If there is data in Redis, worker start to do their jobs. All these jobs have to run simultaneously that's why each worker listen to one particular Redis queue.\nMy question is : Is it common to run more than 20 workers to listen to Redis ? \npython \/usr\/src\/worker1.py\npython \/usr\/src\/worker2.py\npython \/usr\/src\/worker3.py\npython \/usr\/src\/worker4.py\npython \/usr\/src\/worker5.py\n....\n....\npython \/usr\/src\/worker6.py","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":834,"Q_Id":46808342,"Users Score":0,"Answer":"Having multiple worker processes (and when I mean \"multiple\" I'm talking hundreds or more), possibly running on different machines, fetching jobs from a job queue is indeed a common pattern nowadays. There even are whole packages\/frameworks devoted to such workflows, like for example Celery. \nWhat is less common is trying to write the whole task queues system from scratch in a seemingly ad-hoc way instead of using a dedicated task queues system like Celery, ZeroMQ or something similar.","Q_Score":0,"Tags":"python,redis,queue,worker","A_Id":46808475,"CreationDate":"2017-10-18T10:44:00.000","Title":"Is it common to run 20 python workers which uses Redis as Queue ?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to make an application in python that has 1 topic (demo-topic) and 1 partition.\nIn this topic messages are pushed randomly\nI have 1 consumer (consumer1) (demo-group) that uses this messages to makes some background calculations (that take some time).\nHaving this application on amazon i want to be able to scale it (when computation takes to long) in the way that the newly created machine will have another consumer (consumer 2) from the same group (demo-group) reading in the same topic (demo-topic) but in the way that they start splitting the load (consumer 1 takes some load and consumer 2 takes the rest but they never get the same messages)\nAfter the surge of data comes to an halt, second machine is decommissioned and \nconsumer 1 takes all the load again.\nIs this even possible to do (without adding before hand more partitions). Is there a workaround??\nThank you","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":1106,"Q_Id":46812351,"Users Score":0,"Answer":"You could do this, but shouldn't.\nThe basic unit of parallelism in Kafka is the partition: in a consumer group, each consumer reads from one or more partitions and consumers do not share partitions. In order to share a partition, you would need to use a tool like ZooKeeper to lock access to the partition (and keep track of each consumer's position).\nThe use case that you're describing is better served by SQS and an Auto-scaling group.","Q_Score":0,"Tags":"python,amazon-web-services,apache-kafka,multiprocessing,scale","A_Id":46812799,"CreationDate":"2017-10-18T14:16:00.000","Title":"Multiprocessing with python kafka consumers","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to make an application in python that has 1 topic (demo-topic) and 1 partition.\nIn this topic messages are pushed randomly\nI have 1 consumer (consumer1) (demo-group) that uses this messages to makes some background calculations (that take some time).\nHaving this application on amazon i want to be able to scale it (when computation takes to long) in the way that the newly created machine will have another consumer (consumer 2) from the same group (demo-group) reading in the same topic (demo-topic) but in the way that they start splitting the load (consumer 1 takes some load and consumer 2 takes the rest but they never get the same messages)\nAfter the surge of data comes to an halt, second machine is decommissioned and \nconsumer 1 takes all the load again.\nIs this even possible to do (without adding before hand more partitions). Is there a workaround??\nThank you","AnswerCount":2,"Available Count":2,"Score":0.0996679946,"is_accepted":false,"ViewCount":1106,"Q_Id":46812351,"Users Score":1,"Answer":"You cannot have multiple consumers within the same group consume at the same time from the same partition.\nIf you subscribe a second consume within the same group to the same partition, it will act as a hot standby and won't be consuming any messages until the first one stops.\nThe best solution is to add partitions to your topic. That way, you can add consumers when you see a surge in traffic and remove them when traffic slows down. Kafka will do all load balancing for you.","Q_Score":0,"Tags":"python,amazon-web-services,apache-kafka,multiprocessing,scale","A_Id":46812746,"CreationDate":"2017-10-18T14:16:00.000","Title":"Multiprocessing with python kafka consumers","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am writing a small chat app with python using bash commands. I'm using nc to accomplish this but I want to be able to append a username before the user's message. How do I go about doing this without breaking the connection?\nThe command I'm using to connect is just \nnc -l -p 1234 -q 0\nand the desired outcome is that when the person sends something it would look like: <User1> Hello\nThank you!","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":232,"Q_Id":46814272,"Users Score":0,"Answer":"its hard to understand the context and the applications structure, but i would assume that putting the connection in a separate thread would help. So that the connection is always open and the messages can be processed in preferred fashion.","Q_Score":0,"Tags":"python,bash,sockets,networking,scripting","A_Id":46846940,"CreationDate":"2017-10-18T15:48:00.000","Title":"How to print text while netcat is listening at a port?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have some files on a remote Windows system, that I need to retrieve. It's running Windows Server 2008 R2. I would like to retrieve those files to my Ubuntu System and I would like to do it using Python. I have gone through using wmi-client-wrapper, paramiko and wmic. None of them seem to work. Some guidance would be appreciated.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":133,"Q_Id":46826969,"Users Score":0,"Answer":"The easiest way is to use Samba. This way you don't have to install anything on Windows.\n\nYou can do something like mount \/\/windowspc\/share \/mnt, then use Python to copy files from \/mnt to wherever you want.\nYou can call smbclient from Python as a system command\n\nAlternatively, you can install rsync or ssh from Cygwin, or even something like FTP.\nPS: this is not really a Python question, but basic filesharing.","Q_Score":0,"Tags":"python,linux,windows","A_Id":46827088,"CreationDate":"2017-10-19T09:39:00.000","Title":"Python on Linux remotely connect to a Windows PC to retrieve files","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have some couchdb document need to be removed, Is there good way\/steps to backup and delete and backout those document from couchdb?","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":225,"Q_Id":46843096,"Users Score":0,"Answer":"Using CouchDB 1.X you can just save *.couch files corresponding to your databases. Then later you'll be able to use these files to recover your data.\nUsing 2.X I have no idea how to do achieve that since each database is split in shards and the _dbs.couch seems to be needed to restore data. Then you can have a complete backup but not a single database backup. If someone knows how to do that I need the answer too :)","Q_Score":0,"Tags":"javascript,couchdb,backup,couchdb-futon,couchdb-python","A_Id":47079805,"CreationDate":"2017-10-20T05:55:00.000","Title":"Is there good way to backup and delete and backout the document from couchdb?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I downloaded python anaconda 2.7.\nI used to work with the regular python from python.org, but I was asked to work with anaconda.\nany how, I have 2 problems.\n\nright click ->edit with idle (does not exist).\ncan't run py file as a program (like cmd)\/.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":53,"Q_Id":46848067,"Users Score":0,"Answer":"After installing Anaconda, mostly the path environment variable is overridden hence the system now refers to the Anaconda python interpreter, a quick fix is to correct the path environment (this depends on the type of OS you're running).","Q_Score":0,"Tags":"python,anaconda","A_Id":46848373,"CreationDate":"2017-10-20T11:20:00.000","Title":"anaconda python running py file","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"My first gut reaction is that Luigi isn't suited for this sort of thing, but I would like the \"pipeline\" functionality and everything keeps pointing me back to Luigi\/Airflow. I can't use Airflow as it is a Windows environment.\nMy use-case:\nSo currently from my \u201csource\u201d folder we have 20 or so machines that produce XML data. Over time, some process puts these files into a folder continually on each machine (its log data). On any given day these machines could have 0 files in the folder or it could have 100k+ files (each machine). Eventually someone will go delete all of the files. \nOne part of this process is to to watch all of these directories on all of these machines, and copy the files down to an archive folder if they are new.\nMy current process makes a listing of all the files on each machine every 5 minutes, grabs a listing of the files and loops over the source checking if the file is available at the destination. Copies if it doesn't exist at destination, skips if it does. \nIt seems that Luigi wants to work with only \"a\" (singular) file in its output and\/or target. The issue is, I could have 1 new file, or several thousand files that shows up. \nThis same exact issue happens through the entire process. As the next step in my pipeline is to add the files and its metadata information (size, filename, directory location) to a db record. At that point another process reads all of the metadata record rows and puts them into a content extracted table of the XML log data. \nIs Luigi even suited for something like this? Luigi seems to want to deal with one thing, do some work on it, and then emit that information out to another single file.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":252,"Q_Id":46854766,"Users Score":0,"Answer":"I can tell you that mine workflow works with 10K log files every day without any glitches. The main good stuff here that I have created one task for work with each file.","Q_Score":0,"Tags":"python,luigi","A_Id":47312020,"CreationDate":"2017-10-20T17:58:00.000","Title":"Is Luigi suited for building a pipeline around lots of small files (100k+)","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Why is the virtualenvwrapper mkproject command is not working in Windows 10?  And what file do you edit for shell startup in Windows 10 to setup virtualenvwrapper?","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":418,"Q_Id":46864680,"Users Score":0,"Answer":"mkproject is included in v1.2.4 of virtualenvwrapper-win.\nThere is no need to call a setup script like you would do in linux. The linux version implements virtualenvwrapper as shell functions, while virtualenvwrapper-win implements them as .bat files located in your python's Scripts directory.","Q_Score":1,"Tags":"python,windows-10,virtualenvwrapper","A_Id":47361363,"CreationDate":"2017-10-21T15:08:00.000","Title":"virtualenvwrapper mkproject and shell startup in windows issue?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"If I'm just updating, say, my main.py file, is there a better way to update the app then running gcloud app deploy, which takes several minutes? I wouldn't think I need to completely blow up and rebuild the environment if I'm just updating one file.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":50,"Q_Id":46867161,"Users Score":1,"Answer":"You must redeploy the service. App Engine isn't like a standard hosting site where you FTP single files, rather you upload a service that becomes containerized that can scale out to run on many instances. For a small site, this might feel weird, but consider a site serving huge amounts of traffic that might have hundreds of instances of code running that is automatically load balanced. How would you replace that single file in that situation across all your instances? So you upload a new version of a service and then you can migrate traffic to the new version either immediately or ramped up. \nWhat you might consider an annoyance is part of the tradeoff that makes App Engine hugely powerful in not having to worry about how your app scales or is networked.","Q_Score":0,"Tags":"python,google-app-engine","A_Id":46868601,"CreationDate":"2017-10-21T19:25:00.000","Title":"How can I update one (or a couple) files in a Google App Engine Flask App?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"Using os.system('ping 127.0.0.1 -t >> new.txt'). I am able to get the ping result in new.txt document. How to get the ping result in command window and text file at the same time in case of stream output like this...?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":62,"Q_Id":46887360,"Users Score":0,"Answer":"It works with os.system('powershell \"ping 127.0.0.1 -t | tee ping.txt')","Q_Score":0,"Tags":"python,ping,command-window,stream-operators","A_Id":46953793,"CreationDate":"2017-10-23T10:38:00.000","Title":"How to get stream output in command window and text document simultaneously","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I accidentally downloaded python2.6.6 on my centos Virtual Machine from python.org's official download package and compiled it to source.\nNow in my \/usr\/local\/bin I have a python2.6 shell available and now if I use which python it will give me the path of \/usr\/local\/bin instead of original python2.7's path which is \/usr\/bin.\nSince I installed it from source, yum doesn't recognise python2.6.6 as a package and I want to get rid of it.\nIf I do rpm -q python it gives me a result of python-2.7.5-48.0.1.el7.x86_64\nIs it possible to uninstall python2.6.6 and I will just re-point my python system variable to \/usr\/bin again?","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":2370,"Q_Id":46897967,"Users Score":1,"Answer":"Sure, but you'll have to do it the hard way. Dig through \/usr\/local looking for anything Python-related and remove it. The python in \/usr\/bin should be revealed once the one in \/usr\/local\/bin is removed.\nAlso, next time make altinstall. It will install a versioned executable that won't get in the way of the native executable.","Q_Score":2,"Tags":"python,linux,centos,yum,system-configuration","A_Id":46924884,"CreationDate":"2017-10-23T20:29:00.000","Title":"Uninstall python 2.6 without yum","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I realized that while using the ReadFromDatastore PTransform, if the query has a limit set, the query won't be split across workers. The documentation for the Python class says:\n\"... when the query is configured with a limit ..., then all the returned results will be read by a single worker in order to ensure correct data. Since data is read from a single worker, this could have significant impact on the performance of the job.\"\nIn my case, I need to specify the limit, because there are many more entities matching the query in Datastore than I need for this job. However, the performance hit is severe enough that specifying a limit doesn't give me results any faster (or fast enough). What can I do to somehow finish the job and flush the pipeline when I have processed a certain number of entities without getting a performance hit?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":177,"Q_Id":46898800,"Users Score":0,"Answer":"You could omit limit and filter by something else (date?) and then do top N on Dataflow instead.","Q_Score":0,"Tags":"python,google-cloud-datastore,google-cloud-dataflow","A_Id":46920522,"CreationDate":"2017-10-23T21:26:00.000","Title":"Datastore query splitting behaviour when specifying limit on Dataflow pipeline","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Today I messed up the versions of Python on my CentOS machine. Even yum cannot work properly. I made the mistake that I removed the default \/usr\/bin\/python which led to this situation. How could I get back a clear Python environment? I thought remove them totally and reinstall Python may work, but do not know how to do it. Wish somebody could help!","AnswerCount":2,"Available Count":1,"Score":-0.0996679946,"is_accepted":false,"ViewCount":19404,"Q_Id":46915455,"Users Score":-1,"Answer":"To install Python on CentOS: sudo yum install python2\/3 (select the version as per requirement)\nTo uninstall Python on CentOS: sudo yum remove python2\/3 (select the version as per your requirement)\nTo check version for python3(which you installed): python3 --version\nTo check version for python2 (which you installed): python2 --version","Q_Score":3,"Tags":"python,centos,rpm,yum","A_Id":63481093,"CreationDate":"2017-10-24T16:20:00.000","Title":"Remove clearly and reinstall python on CentOS","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to install bluepy 1.0.5. However, I get receiving error below.  Any idea how can i solve it? (I am using Mac OS X El Capitan)\n\n40:449: execution error: The directory '\/Users\/isozyesil\/Library\/Caches\/pip\/http' or its parent directory is not owned by the current user and the cache has been disabled. Please check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.\n  The directory '\/Users\/isozyesil\/Library\/Caches\/pip' or its parent directory is not owned by the current user and caching wheels has been disabled. check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.\n  Command \/usr\/bin\/python -u -c \"import setuptools, tokenize;__file__='\/private\/var\/folders\/95\/f900ttf95g1b7h02y2_rtk400000gn\/T\/pycharm-packaging669\/bluepy\/setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\\r\\n', '\\n');f.close();exec(compile(code, __file__, 'exec'))\" install --record \/var\/folders\/95\/f900ttf95g1b7h02y2_rtk400000gn\/T\/pip-djih0T-record\/install-record.txt --single-version-externally-managed --compile\n  failed with error code 1 in \/private\/var\/folders\/95\/f900ttf95g1b7h02y2_rtk400000gn\/T\/pycharm-packaging669\/bluepy\/\n       (1)","AnswerCount":3,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":2751,"Q_Id":46918646,"Users Score":0,"Answer":"What part of the diagnostic message did you find unclear?\nDid you consider ensuring writable self-owned files by doing sudo chown -R isozyesil \/Users\/isozyesil\/Library\/Caches\/pip ?\nDid you consider sudo pip install bluepy ?","Q_Score":2,"Tags":"python,serial-port,pycharm,signals,signal-processing","A_Id":46918772,"CreationDate":"2017-10-24T19:32:00.000","Title":"Bluepy Installation Error","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm trying a Django tutorial. For some reason my existing superuser got deleted; creating that went fine, but I can't make another one. This also happens when I try to use pip.\nI didn't change anything in the libraries so not sure why this happens now but didn't before. On windows 7 (Python 3.6.3 and Django 1.11). I've seen similar but not the exact same problems for Windows. Still I checked the file and there seems to be a PathLike class.\nI've also tried to repair my Python installation but it didn't help. any ideas?","AnswerCount":4,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":3463,"Q_Id":46920188,"Users Score":0,"Answer":"Update your Python and Django version and that will work perfect.","Q_Score":3,"Tags":"python,django,attributeerror","A_Id":64591309,"CreationDate":"2017-10-24T21:19:00.000","Title":"manage.py createsuperuser: AttributeError: module 'os' has no attribute 'PathLike'","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I'm trying a Django tutorial. For some reason my existing superuser got deleted; creating that went fine, but I can't make another one. This also happens when I try to use pip.\nI didn't change anything in the libraries so not sure why this happens now but didn't before. On windows 7 (Python 3.6.3 and Django 1.11). I've seen similar but not the exact same problems for Windows. Still I checked the file and there seems to be a PathLike class.\nI've also tried to repair my Python installation but it didn't help. any ideas?","AnswerCount":4,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":3463,"Q_Id":46920188,"Users Score":0,"Answer":"Seems like you may have modified the settings.py file. But as MrName mentioned you need to share full stack trace","Q_Score":3,"Tags":"python,django,attributeerror","A_Id":46932401,"CreationDate":"2017-10-24T21:19:00.000","Title":"manage.py createsuperuser: AttributeError: module 'os' has no attribute 'PathLike'","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I have researching for a few hours now but I cannot confirm If as of October 2017, you can run airflow on Windows. I have installed it using Python package \"pip install airflow\" but I cannot initialize it or even see the version, which I assume that it cannot run on Windows.","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":11045,"Q_Id":46922950,"Users Score":14,"Answer":"We make heavy use of airflow, and we use VM's running Linux to get it running. We have Windows machines, but have to use VM's or mount drives on Linux\/Mac boxes to get it to work. As far as I know it's not even on the road map to have Airflow run on Windows. \nSo, long answer short: No, even as of October 2017 airflow runs only on Unix based systems (it uses some python libraries that only work for unix underneath), and it's unlikely that anytime soon it will support Windows.","Q_Score":3,"Tags":"python,airflow,apache-airflow","A_Id":46962458,"CreationDate":"2017-10-25T02:25:00.000","Title":"Can I run Airflow on Windows?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am running a uwsgi application on my linux mint. it has does work with a database and shows it on my localhost. i run it on 127.0.0.1 IP and 8080 port. after that i want to test its performance by ab(apache benchmark).\nwhen i run the app by command uwsgi --socket 0.0.0.0:8080 --protocol=http -w wsgi and get test of it, it works correctly but slowly.\nso i want to run the app with more than one thread to speed up. so i use --threads option and command is uwsgi --socket 0.0.0.0:8080 --protocol=http -w wsgi --threads 8 for example. \nbut when i run ab to test it, after 2 or 3 request, my application stops with some errors and i don't know how to fix it. every time i run it, type of errors are different. some of errors are like these:\n\n(Traceback (most recent call last): 2014, 'Command Out of Sync')\n\nor \n\n(Traceback (most recent call last):   File \".\/wsgi.py\", line 13, in\n  application\n      return show_description(id)   File \".\/wsgi.py\", line 53, in show_description\n      cursor.execute(\"select * from info where id = %s;\" %id)   File \"\/home\/mohammadhossein\/myFirstApp\/myappenv\/local\/lib\/python2.7\/site-packages\/pymysql\/cursors.py\",\n  line 166, in execute\n      result = self._query(query)   File \"\/home\/mohammadhossein\/myFirstApp\/myappenv\/local\/lib\/python2.7\/site-packages\/pymysql\/cursors.py\",\n  line 322, in _query\n      conn.query(q)   File \"\/home\/mohammadhossein\/myFirstApp\/myappenv\/local\/lib\/python2.7\/site-packages\/pymysql\/connections.py\",\n  line 856, in query\n      self._affected_rows = self._read_query_result(unbuffered=unbuffered) 'Packet sequence number\n  wrong - got 1 expected 2',)   File\n  \"\/home\/mohammadhossein\/myFirstApp\/myappenv\/local\/lib\/python2.7\/site-packages\/pymysql\/connections.py\",\n  line 1057, in _read_query_result\n\nor \n\n('Packet sequence number wrong - got 1 expected 2',) Traceback (most\n  recent call last):\n\nor \n\n('Packet sequence number wrong - got 1 expected 2',) Traceback (most\n  recent call last):   File \".\/wsgi.py\", line 13, in application\n      return show_description(id)   File \".\/wsgi.py\", line 52, in show_description\n      cursor.execute('UPDATE info SET  views = views+1 WHERE id = %s;', id)   File\n  \"\/home\/mohammadhossein\/myFirstApp\/myappenv\/local\/lib\/python2.7\/site-packages\/pymysql\/cursors.py\",\n  line 166, in execute\n      result = self._query(query)\n\nPlease help me how to run my uwsgi application wiht more than one thread safety. any help will be welcome","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":238,"Q_Id":46927517,"Users Score":0,"Answer":"it has solved.\nthe point is that you should create separate connection for each completely separate query to avoid missing data during each query execution","Q_Score":0,"Tags":"python,multithreading,server,uwsgi","A_Id":47568008,"CreationDate":"2017-10-25T08:26:00.000","Title":"uwsgi application stops with error when running it with multi thread","Data Science and Machine Learning":0,"Database and SQL":1,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"How to open my .py script from anywhere on my pc directly into python idle form command prompt?\nIs there any way so that i can typeidle test.py on cmd so that it opens the test.py file in the current directory and if test.py is not available creates a new file and opens it into idle","AnswerCount":3,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":2809,"Q_Id":47001108,"Users Score":3,"Answer":"You can do that by adding the directory where you have installed the idle editor the PATH environment variable.\nHow to do that depends on your operating system: just search the Internet for add directory to path plus your operating system: e.g. Windows\/Ubuntu, etc.\nAfter changing the environment variable it may be a good idea to restart your PC (to make sure that all programs use the updated version)","Q_Score":3,"Tags":"python,windows,python-idle","A_Id":47001239,"CreationDate":"2017-10-29T14:07:00.000","Title":"Python IDLE from cmd","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a Raspberry Pi running Linux. My plan is that I can plug in a USB in the robot and have and it will run the python files. the reason I chose this method is that it allows for easy editing and debugging of the scripts.\nIs there a way to execute my files when the USB is inserted?","AnswerCount":2,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":2024,"Q_Id":47005067,"Users Score":1,"Answer":"Try to use os.path.exists to detect whether the pendrive is there in an infinite loop and when detected execute code on pendrive using os.system and break out of loop .","Q_Score":0,"Tags":"python,usb,autorun","A_Id":58617987,"CreationDate":"2017-10-29T20:44:00.000","Title":"Auto run python file when usb inserted","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I like to change my operating system. I also frequently format it when it becomes cluttered and restore needed files from backup. I started to develop my tiny script in bash that automatizes some of those tasks, like adding repositories, installing software, setting up wallpaper and panels and so on. Unfortunately, this bash script is getting less and less readable. I was wondering, what language could I pick, so that after reinstalling operating system I will be able to copy my little program from pendrive, run it and let it do whole work for me.\nMost of programming languages require to install some kind of running environment (let's take java and JRE as an example). This is why I am focusing on languages, that can be run immediately after installing operating system. As I am only using GNU\/Linux systems, bash was an obvious choice. But readability is a downside. I thought about Python, but some operating systems have 2.X and some 3.X.\nWhat can I do, to create tiny generic program, that will work on most Linux based operating systems?\nI know, that this is pretty much hard question without specifying those operating systems, but I simply do not know what operating system will I use in future (beside fact, that it will be mainstream Linux OS). We can assume, that it is enough if it can run on at least 80 of 100 operating systems listed on distrowatch.com.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":37,"Q_Id":47060759,"Users Score":0,"Answer":"You should definitely learn basic C++. \nYou really just have to learn <iostream>'s std::cout, std::cin, std::endl and the <csysio>'s system() function for executing commands.\nPros:\n\nIt's available for every Linux system.\nIt's far more extensible than Bash.\nYou can compile your program using static linking so that it doesn't need ANY dependency on a new system.\n\nCons:\n\nHarder to learn.\nHave to compile the code.","Q_Score":0,"Tags":"python,linux,bash","A_Id":47060870,"CreationDate":"2017-11-01T17:44:00.000","Title":"Bootstraping operating system settings after reinstall","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm writing a python script that generates a text file report of CPU usage per core. Really, what I want is the information that top provides once you type 1. \nHowever, optimally this would be returned to the terminal (just like running top -b) so I can grep etc. \nIs there a way of getting this information, either with top or another command, in a format that I can then grep and handle within my python script. Thanks very much!","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":134,"Q_Id":47061792,"Users Score":0,"Answer":"You can run the \"top\" command from within a python script using \"subprocess.run()\" and get the output in the returned \"CompletedProcess\" instance.","Q_Score":0,"Tags":"python,linux","A_Id":47061983,"CreationDate":"2017-11-01T18:55:00.000","Title":"Generate report of Linux CPU info per core using top","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I created a django app with a celery task that organises database tables. The celery task takes about 8 seconds to do the job ( quite heavy table moves and lookups in over 1 million lines )\nThis celery starts through a button click by a registered user.\nI created a task-view in views.py and a separate task-url in urls.py. When navigating to this task-url, the task starts. \nMy Problem:\n\nWhen you refresh the task-url while the task is not finished, you fire up a new task.\nWith this set-up, you navigate to another page or reload the view\n\nHow do I prevent the task from firing up each time on refresh and prevent navigating to another page. Ideally, a user can only run one task of this particular type.\nMight this be doable with JQuery\/Ajax? Could some hero point me out in the right direction as I am not an expert an have no experience with JQuery\/Ajax.\nThanks","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":1196,"Q_Id":47075629,"Users Score":2,"Answer":"\"How do I prevent the task from firing up each time on refresh\"\n\nFirst make sure you use the \"POST\/redirect\/GET\" pattern: your view should only fire the task on a \"POST\" request (GET request must not have side-effects), and then return a HttpResponseRedirect. \nThis won't prevent the user from firing a second task while the first is still running, but it does prevent re-submitting the form each time you refresh (\"GET\") the page...\n\nIdeally, a user can only run one task of this particular type.\n\nWhen firing a task, store it's id in the session, and before firing a task check the session for a task id. If there's one, use it to check the task's state. If it's done (whatever the result), remove the task id and proceed with the new task, else just display a message telling your user he already has a task running.\nJust make sure you correctly handle the case of a \"ghost\" task_id in the session (it might be a long finished task for which celery already discarded the results, or a task that got lost in a worker or broker crash - yeah, sh!t happens - etc). A working solution is to actually store a (timestamp, task_id) pair and if celery has no state for the task_id \n - actually \"no state\" is (mis)named celery.states.PENDING, which really means \"I don't have a clue about this task's state ATM\" - check the timestamp. If it's way older than it should then you can probably consider it as long dead and 6 feets under. \n\nand prevent navigating to another page. \n\nWhy would you want to prevent your user to do something else in the meantime, actually ? From a UI\/UX point of view, once the task is fired, your user should be redirected to a \"please wait\" page with (as much as possible) some progress bar or similar feedback. The simple (if a bit heavy) solution here is to do some polling using ajax : you setup a view that takes a task_id, check results \/ progress and returns them as json, and the 'please wait' page calls this views (using ajax) every X seconds to update itself (and possibly redirect the user to the next page when the task is done).\nNow if there are some operations (apart from re-launching the same task) your user couldn't do while a task is running, you can use the same \"check session for a current task\" mechanism for those operations (making it a view decorator really helps).","Q_Score":0,"Tags":"jquery,python,ajax,django,celery","A_Id":47076457,"CreationDate":"2017-11-02T12:43:00.000","Title":"run celery task only once on button click","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"Using dockerbuild file, how can I do there something like:\nexport PYTHONPATH=\/:$PYTHONPATH\nusing RUN directive or other option","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":2449,"Q_Id":47079459,"Users Score":7,"Answer":"In your Dockerfile, either of these should work:\n\nUse the ENV instruction (ENV PYTHONPATH=\"\/:$PYTHONPATH\")\nUse a prefix during the RUN instruction (RUN export PYTHONPATH=\/:$PYTHONPATH && <do something>)\n\nThe former will persist the changes across layers. The latter will take effect in that layer\/RUN command","Q_Score":2,"Tags":"python,docker","A_Id":47079624,"CreationDate":"2017-11-02T15:50:00.000","Title":"Adding path to pythonpath in dockerbuild file","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"What's the best way to manage multiple Python installations (long-term) if I've already installed Python 3 via brew? In the past Python versions were installed here, there, and everywhere, because I used different tools to install various updates. As you can imagine, this eventually became a problem.\nI once was in a situation where a package used in one of my projects only worked with Python 3.4, but I had recently updated to 3.6. My code no longer ran, and I had to scour the system for Python 3.4 to actually fire up the project. It was a huge PITA. \nI recently wiped my computer and would like to avoid some of my past mistakes. Perhaps this is na\u00efve, but I'd like to limit version installation to brew. (Unless that's non-sensical \u2014 I'm open to other suggestions!) Furthermore, I'd like to know how to resolve my past version management woes (i.e. situations like the one above). I've heard of pyenv, but would that conflict with brew?\nThanks!","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":432,"Q_Id":47082736,"Users Score":0,"Answer":"I agree to using virtualenv, it allows you to manage different python versions separately for different projects and clients. \nThis basically allows you to have each project it's own dependencies which are isolated from others.","Q_Score":0,"Tags":"python,macos,homebrew","A_Id":47084214,"CreationDate":"2017-11-02T18:58:00.000","Title":"Managing multiple Python versions on OSX","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"What's the best way to manage multiple Python installations (long-term) if I've already installed Python 3 via brew? In the past Python versions were installed here, there, and everywhere, because I used different tools to install various updates. As you can imagine, this eventually became a problem.\nI once was in a situation where a package used in one of my projects only worked with Python 3.4, but I had recently updated to 3.6. My code no longer ran, and I had to scour the system for Python 3.4 to actually fire up the project. It was a huge PITA. \nI recently wiped my computer and would like to avoid some of my past mistakes. Perhaps this is na\u00efve, but I'd like to limit version installation to brew. (Unless that's non-sensical \u2014 I'm open to other suggestions!) Furthermore, I'd like to know how to resolve my past version management woes (i.e. situations like the one above). I've heard of pyenv, but would that conflict with brew?\nThanks!","AnswerCount":2,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":432,"Q_Id":47082736,"Users Score":2,"Answer":"Use virtualenvs to reduce package clash between independent projects.  After activating the venv use pip to install packages. This way each project has an independent view of the package space. \nI use brew to install both Python 2.7 and 3.6. The venv utility from each of these will build a 2 or 3 venv respectively. \nI also have pyenv installed from brew which I use if I want a specific version that is not the latest in brew. After activating a specific version in a directory, I will then create a venv and use this to manage the package isolation. \nI can't really say what is best. Let's see what other folks say.","Q_Score":0,"Tags":"python,macos,homebrew","A_Id":47083151,"CreationDate":"2017-11-02T18:58:00.000","Title":"Managing multiple Python versions on OSX","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"The doc is:\n\nWith this option you can configure the maximum number of tasks a worker can execute before it\u2019s replaced by a new process.\n\nIn what condition will a worker be replaced by a new process ? Does this setting make a worker, even with multi processes, can only process one task at one time?","AnswerCount":1,"Available Count":1,"Score":1.0,"is_accepted":false,"ViewCount":3499,"Q_Id":47089489,"Users Score":7,"Answer":"It means that when celery has executed tasks more than the limit on one worker (the \"worker\" is a process if you use the default process pool), it will restart the worker automatically.\nSay if you use celery for database manipulation and you forget to close the database connection, the auto restart mechanism will help you close all pending connections.","Q_Score":4,"Tags":"python-3.x,celery","A_Id":47645248,"CreationDate":"2017-11-03T06:10:00.000","Title":"What does [Max tasks per child setting] exactly mean in Celery?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"As in the title, when running the appserver I get a DistributionNotFound exception for google-cloud-storage:\n\nFile \"\/home\/[me]\/Desktop\/apollo\/lib\/pkg_resources\/init.py\", line 867, in resolve\n      raise DistributionNotFound(req, requirers)\n  DistributionNotFound: The 'google-cloud-storage' distribution was not found and is required by the application\n\nRunning pip show google-cloud-storage finds it just fine, in the site packages dir of my venv.  Everything seems to be in order with python -c \"import sys; print('\\n'.join(sys.path))\" too; the cloud SDK dir is in there too, if that matters.\nNot sure what to do next.","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":1810,"Q_Id":47104930,"Users Score":0,"Answer":"The solution for me was that both google-cloud-storage and pkg_resources need to be in the same directory.\nIt sounds like your google-cloud-storage is in venv and your pkg_resources is in the lib folder","Q_Score":7,"Tags":"google-cloud-platform,google-cloud-storage,google-cloud-python","A_Id":65637184,"CreationDate":"2017-11-03T21:56:00.000","Title":"google-cloud-storage distribution not found despite being installed in venv","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"What is the difference between \"AWS Command Line Interface\" and \"AWS Elastic Beanstalk Command Line Interface\"? \nDo I need both to deploy a Django project through AWS Elastic Beanstalk?\nThank you!","AnswerCount":3,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":1072,"Q_Id":47106848,"Users Score":2,"Answer":"You should start with the EBCLI and then involve the AWSCLI where the EBCLI falls short.\nThe AWSCLI (aws) allows you to run commands from a bunch of different services, whereas, the EBCLI (eb) is specific to Elastic Beanstalk. The EBCLI makes a lot of tedious tasks easier because it is less hands on than the AWS CLI. I have observed, for most of my tasks, the EBCLI is sufficient; I use the AWS CLI and the AWS SDKs otherwise.\nConsider deploying your Django app.\n\nYou could start off by performing eb init, which would take you through an interactive set of menus, from which you would choose your region, and solution stack (Python).\nNext, you would perform eb create, which creates an application version and subsequently an Elastic Beanstalk environment for you.\n\nThe above two EBCLI steps translate to half a dozen or more AWSCLI steps. Furthermore, a lot of the processes that the EBCLI hides from you involve multiple AWS services, which can make the task of replicating the EBCLI through the AWS CLI all the more tedious and error-prone.","Q_Score":3,"Tags":"python,django,amazon-web-services,aws-cli,amazon-elastic-beanstalk","A_Id":47276695,"CreationDate":"2017-11-04T02:40:00.000","Title":"What is the difference between AWSCLI and AWSEBCLI?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"What is the difference between \"AWS Command Line Interface\" and \"AWS Elastic Beanstalk Command Line Interface\"? \nDo I need both to deploy a Django project through AWS Elastic Beanstalk?\nThank you!","AnswerCount":3,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":1072,"Q_Id":47106848,"Users Score":0,"Answer":"You only need eb to deploy and control Elastic Beanstalk. You can use aws to control any other resource in AWS. You can also use aws for lower-level control of Elastic Beanstalk.","Q_Score":3,"Tags":"python,django,amazon-web-services,aws-cli,amazon-elastic-beanstalk","A_Id":47106874,"CreationDate":"2017-11-04T02:40:00.000","Title":"What is the difference between AWSCLI and AWSEBCLI?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"For example i want to count number of files in a directory in real time. As python script will be running continuously in background, when i add a file in the directory, value of count variable updates in my script.\nSo, i need a solution with which pyton script keeps running and updates vcalue in runtime.","AnswerCount":2,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":152,"Q_Id":47110412,"Users Score":0,"Answer":"You can use 'task scheduler' if you are using windows, or 'crontab' if you are using linux, those will run the scrip in the background for you.\nThere are different ways to do the thing that you are asking for.\nFor example, you can run the script that counts the files, and each time it runs, writes the number of files it found to a txt file somewhere.","Q_Score":0,"Tags":"python,python-3.x","A_Id":47110895,"CreationDate":"2017-11-04T11:50:00.000","Title":"Python script to keep a python file running all the time","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"For example i want to count number of files in a directory in real time. As python script will be running continuously in background, when i add a file in the directory, value of count variable updates in my script.\nSo, i need a solution with which pyton script keeps running and updates vcalue in runtime.","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":152,"Q_Id":47110412,"Users Score":0,"Answer":"You can use a package called \"threading\", which runs the code every n seconds(minutes, hours etc.)","Q_Score":0,"Tags":"python,python-3.x","A_Id":47110985,"CreationDate":"2017-11-04T11:50:00.000","Title":"Python script to keep a python file running all the time","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I need a way to ensure only one python process is processing a directory.\nThe lock\/semaphore should be local to the machine (linux operating system). \nNetworking or NFS is not involved.\nI would like to avoid file based locks, since I don't know where I should put the lock file.\nThere are libraries which provide posix IPC at pypi.\nIs there no way to use linux semaphores with python without a third party library?\nThe lock provided by multiprocessing.Lock does not help, since both python interpreter don't share one the same parent.\nThreading is not involved. All processes have only one thread.\nI am using Python 2.7 on linux.\nHow to to synchronize two python scripts on linux (without file based locking)?\nRequired feature: If one process dies, then the lock\/semaphore should get released by the operating system.","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":1095,"Q_Id":47136965,"Users Score":0,"Answer":"I would like to avoid file based locks, since I don't know where I should put the lock file.\n\nYou can lock the existing file or directory (the one being processed).\n\nRequired feature: If one process dies, then the lock\/semaphore should get released by the operating system. \n\nThat is exactly how file locks work.","Q_Score":2,"Tags":"python,linux,ipc,python-multiprocessing","A_Id":47141169,"CreationDate":"2017-11-06T12:22:00.000","Title":"Linux IPC: Locking, but not file based locking","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have been using pywinauto for opening a command prompt (Mingw-64) and was passing commands using type_keys\nIt was working properly in my local system but, when i hosted my code into RDP server, i am not able to restore the window and pass the commands when RDP is in minimized state \nPlease give me a proper solution and let me know if any package does the same purpose.\nThanks!","AnswerCount":2,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":1048,"Q_Id":47137372,"Users Score":1,"Answer":"There are several points to improve.\n\nIt's better to use standard Python module subprocess with stdin re-direction to communicate with a command line application. I'd highly recommend you this way which is resistant to RDP minimizing.\nRDP doesn't provide GUI context in minimized state (any GUI automation tool will give up here). To workaround it simply switch RDP from full-screen mode to restored window state (non-minimized!), run your GUI automation script inside RDP window and quickly switch to your local machine (to another window) and continue your work without affecting the automation script. Just don't ever minimize RDP. It's a manual quick hack, if you do it rarely.\nThird thing to automate is using command psexec with key -i (interactive). This way you can run remote commands with GUI context automatically without manual hacks. Just find and download PsexecTools (recommended) or learn similar commands for Power Shell.\nTo eliminate this problem at all just use VNC Server software like TightVNC instead of RDP. If you used RDP at least once, you have to reboot the remote machine though. One more possible pitfall is the fact that VNC display is not virtual (like RDP session), hence it requires to have relevant display drivers for your video card. Otherwise you may face with black screen or small resolution. The big plus of VNC that it keeps GUI context even if you disconnect from current session (i.e. closed your laptop before going home).","Q_Score":0,"Tags":"python-2.7,pywinauto","A_Id":47142927,"CreationDate":"2017-11-06T12:45:00.000","Title":"How to restore a window in RDP using pywinauto, when RDP is in Minimized state","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have installed Python3 and pip3 on my Macbook pro. \nRunning python --version shows Python 3.6.3\nRunning pip --version shows pip 9.0.1 from \/usr\/local\/lib\/python3.6\/site-packages (python 3.6)\nhowever running aws --version shows aws-cli\/1.11.170 Python\/2.7.10 Darwin\/16.7.0 botocore\/1.7.28\nLooks like it's using python2. How do I fix this?","AnswerCount":1,"Available Count":1,"Score":0.3799489623,"is_accepted":false,"ViewCount":3869,"Q_Id":47146493,"Users Score":2,"Answer":"Why is it really an issue?\nI assume you installed the AWS CLI tool by downloading the installer directly. If you want to \"fix\" it then uninstall the CLI tool, and then install it through pip with pip install awscli.","Q_Score":2,"Tags":"python,amazon-web-services,boto3,aws-cli","A_Id":47146546,"CreationDate":"2017-11-06T21:54:00.000","Title":"AWS CLI is using Python 2 instead of Python 3","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I'm trying to create a python script to help me manage my car radio's music library. The idea is the following: I have a USB flash drive with 2-hour podcast mp3 files. Since I never drive such long journeys, the script splits the files in 5-minute fragments and removes the originals.\nNow, the next thing I would want to do is automatically remove the ones I've already played. My first idea was something like DRM or a self-destructing file that erased itself once it's played, but from what I have found online that's pretty much impossible.\nSo, the question is, can I check with pydub if the file has been already played, so when I arrive home I can plug the USB in the computer, run the script, detect the played files and erase them?\nThanks and sorry if it's a dumb question!","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":57,"Q_Id":47146728,"Users Score":0,"Answer":"No. Playing an audio file doesn't modify the file.\nUnless your car stereo writes some sort of log to the flash drive of what it's played -- which is unlikely; I've never seen or heard of a stereo that did that -- there's no way to determine which files have been played.","Q_Score":0,"Tags":"python,audio,pydub","A_Id":47147058,"CreationDate":"2017-11-06T22:13:00.000","Title":"Can pydub know if a file has ever been played?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"After running sudo pip install google.cloud.pubsub\nI am running the following python code in ubtunu google compute engine:\nimport google.cloud.pubsub_v1\nI get the following error when importing this:\n\nImportError: No module named pubsub_v1 attribute 'SubscriberClient'\n\nCan anyone tell me how to fix this?","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":558,"Q_Id":47193190,"Users Score":1,"Answer":"Update your google-cloud-pubsub to the latest version. It should resolve the issue","Q_Score":2,"Tags":"python,cloud,publish-subscribe","A_Id":51531222,"CreationDate":"2017-11-09T03:02:00.000","Title":"AttributeError: 'module' object has no attribute 'SubscriberClient'","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I wanted to know whether win32com.client package be used in an python app if I want to run that application in the Unix server. My goal is to set a cron in the unix server to automate some mail related task using win32com.client. All I want to know is that will this whole win32com will work smoothly in the Unix server.","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":624,"Q_Id":47194826,"Users Score":0,"Answer":"No. win32com can only be installed and used on a Windows OS.","Q_Score":0,"Tags":"python,unix,win32com","A_Id":47194889,"CreationDate":"2017-11-09T05:56:00.000","Title":"Small query regarding win32com.client","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I've been using gcloud and gsutil for a while but now suddenly for any gsutil command I run I get errors:\nTraceback (most recent call last):\n  File \"\/Users\/julian\/google-cloud-sdk\/bin\/bootstrapping\/gsutil.py\", line 12, in \n    import bootstrapping\n  File \"\/Users\/julian\/google-cloud-sdk\/bin\/bootstrapping\/bootstrapping.py\", line 22, in \n    from googlecloudsdk.core.credentials import store as c_store\n  File \"\/Users\/julian\/google-cloud-sdk\/lib\/googlecloudsdk\/core\/credentials\/store.py\", line 27, in \n    from googlecloudsdk.core import http\n  File \"\/Users\/julian\/google-cloud-sdk\/lib\/googlecloudsdk\/core\/http.py\", line 31, in \n    from googlecloudsdk.core.resource import session_capturer\n  File \"\/Users\/julian\/google-cloud-sdk\/lib\/googlecloudsdk\/core\/resource\/session_capturer.py\", line 32, in \n    from googlecloudsdk.core.resource import yaml_printer\n  File \"\/Users\/julian\/google-cloud-sdk\/lib\/googlecloudsdk\/core\/resource\/yaml_printer.py\", line 17, in \n    from googlecloudsdk.core.resource import resource_printer_base\n  File \"\/Users\/julian\/google-cloud-sdk\/lib\/googlecloudsdk\/core\/resource\/resource_printer_base.py\", line 38, in \n    from googlecloudsdk.core.resource import resource_projector\n  File \"\/Users\/julian\/google-cloud-sdk\/lib\/googlecloudsdk\/core\/resource\/resource_projector.py\", line 34, in \n    from google.protobuf import json_format as protobuf_encoding\nImportError: cannot import name json_format\n\nI tried gcloud update and gcloud reinstall but still get same problem. Is there a conflict with the python installation? Any other ideas?","AnswerCount":5,"Available Count":2,"Score":0.0399786803,"is_accepted":false,"ViewCount":2067,"Q_Id":47200623,"Users Score":1,"Answer":"I had the same issue. I am using a mac. \nLooking into \/usr\/local\/lib\/python2.7\/site-packages i found a homebrew protobuf link.\nI removed it with \"rm homebrew-protobuf.pth\"\nThen gsutil started working.","Q_Score":9,"Tags":"python,gcloud,gsutil,google-cloud-sdk","A_Id":49879820,"CreationDate":"2017-11-09T11:24:00.000","Title":"gsutil no longer works?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I've been using gcloud and gsutil for a while but now suddenly for any gsutil command I run I get errors:\nTraceback (most recent call last):\n  File \"\/Users\/julian\/google-cloud-sdk\/bin\/bootstrapping\/gsutil.py\", line 12, in \n    import bootstrapping\n  File \"\/Users\/julian\/google-cloud-sdk\/bin\/bootstrapping\/bootstrapping.py\", line 22, in \n    from googlecloudsdk.core.credentials import store as c_store\n  File \"\/Users\/julian\/google-cloud-sdk\/lib\/googlecloudsdk\/core\/credentials\/store.py\", line 27, in \n    from googlecloudsdk.core import http\n  File \"\/Users\/julian\/google-cloud-sdk\/lib\/googlecloudsdk\/core\/http.py\", line 31, in \n    from googlecloudsdk.core.resource import session_capturer\n  File \"\/Users\/julian\/google-cloud-sdk\/lib\/googlecloudsdk\/core\/resource\/session_capturer.py\", line 32, in \n    from googlecloudsdk.core.resource import yaml_printer\n  File \"\/Users\/julian\/google-cloud-sdk\/lib\/googlecloudsdk\/core\/resource\/yaml_printer.py\", line 17, in \n    from googlecloudsdk.core.resource import resource_printer_base\n  File \"\/Users\/julian\/google-cloud-sdk\/lib\/googlecloudsdk\/core\/resource\/resource_printer_base.py\", line 38, in \n    from googlecloudsdk.core.resource import resource_projector\n  File \"\/Users\/julian\/google-cloud-sdk\/lib\/googlecloudsdk\/core\/resource\/resource_projector.py\", line 34, in \n    from google.protobuf import json_format as protobuf_encoding\nImportError: cannot import name json_format\n\nI tried gcloud update and gcloud reinstall but still get same problem. Is there a conflict with the python installation? Any other ideas?","AnswerCount":5,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":2067,"Q_Id":47200623,"Users Score":0,"Answer":"For CentOS 7.5 (probably earlier as well) using the Google Cloud SDK rpm install, removing the protobuf-python package yum remove protobuf-python will solve this.","Q_Score":9,"Tags":"python,gcloud,gsutil,google-cloud-sdk","A_Id":51340051,"CreationDate":"2017-11-09T11:24:00.000","Title":"gsutil no longer works?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm wondering what is the proper reaction to evens that lead to the error_cb callback being called.\nInitially our code was always throwing an Exception from the error_cb regardless of anything. We're running our stuff in Kubernetes, so restarting a consumer\/producer is (technically) not a big deal. But the number of restart were quite significant, so we added a couple of exceptions, which we just log without quitting:\n\nKafkaError._MSG_TIMED_OUT (both consumer and producer)\nKafkaError._TRANSPORT (consumer)\n\nThese are the ones that we see a lot, and confluent-kafka-python seems to be able to recover from them without any extra help. \nNow I'm wondering if we were right to throw any exceptions in error_cb to begin with. Should we start treating error_cb just as a logging function, and only react to exceptions thrown explicitly by poll and flush?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":1415,"Q_Id":47215245,"Users Score":2,"Answer":"librdkafka will do its best to automatically recover from any errors it hits, so the error_cb is mostly informational and it is generally not advisable for the application to do anything drastic upon such an error.\n\n_MSG_TIMED_OUT and _TIMED_OUT- Kafka protocol requests timed out, typically due to network or broker issues. The requests will be retried according to the retry configuration, or the corresponding API \/ functionality willl propagate a more detailed error (e.g., failure to commit offsets). This error can safely be ignored.\n_TRANSPORT - the broker connection went down or could not be established, again this is a temporary network or broker problem and may too be safely ignored.","Q_Score":0,"Tags":"python,apache-kafka,confluent-platform","A_Id":47280609,"CreationDate":"2017-11-10T03:31:00.000","Title":"error_cb in confluent-kafka-python producers and consumers","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I want to read from standard input chunk by chunk until EOF. For example, I could have a very large file, and I want to read in and process 1024 bytes at a time from STDIN until EOF is encountered. I've seen sys.stdin.read() which saves everything in memory at once. This isn't feasible because there might not be enough space available to store the entire file. There is also for \"line in sys.stdin\", but that separates the input by newline only, which is not what I'm looking for. Is there any way to accomplish this in Python?","AnswerCount":3,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":2344,"Q_Id":47232558,"Users Score":0,"Answer":"You can read stdin (or any file) in chunks using f.read(n), where n is the integer number of bytes you want to read as an argument. It will return the empty string if there is nothing left in the file.","Q_Score":2,"Tags":"python,python-3.x","A_Id":47232633,"CreationDate":"2017-11-10T23:16:00.000","Title":"Python: How to read from stdin by byte chunks until EOF?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am working with python3 on Debian Stable Linux. I see that I can install most packages from Debian repository as well as using pip install packagename command. \nIs there any difference between these two approaches and should I prefer one over the other? Are the location of packages installed different in two methods? Thanks for your answers\/comments.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":44,"Q_Id":47235661,"Users Score":0,"Answer":"It is much easier to install or uninstall modules with the Pip, or Pip3 command.","Q_Score":0,"Tags":"python,linux,python-3.x,package","A_Id":47235704,"CreationDate":"2017-11-11T07:48:00.000","Title":"Intalling python packages with pip versus installing from Linux repository","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have two scripts inside a bigger system I'm developing. Lets call one foo.py and the other one bar.py.\nfoo creates files that bar will afterwards read and delete. Now, if foo is running and working on a file, bar will mess things up by working on the same file before foo is finished.\nfoo and bar get started automatically by other stuff, not manually by someone that runs them. How can I make sure that, if foo is working on a file, bar will not start?\nI have thought about editing both of them so that foo writes a 1 to a text file at the beginning of the execution and a 0 when it finishes, and to make bar read the text file to check wheter it can start. But I'm not really sure this is the most elegant solution, and also I don't want to block bar if foo ever fails in the middle of execution, leaving the file at 1.","AnswerCount":3,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":878,"Q_Id":47240282,"Users Score":0,"Answer":"A possible strategy :  \n\nfoo build todo.foo.\nit renames it todo.bar when done.\nbar look after todo.bar, compute it and delete it when done.","Q_Score":2,"Tags":"python,python-3.x","A_Id":47240379,"CreationDate":"2017-11-11T16:41:00.000","Title":"Prevent python script from running if another one is being executed","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"CentOS release 6.9 (Final) : Linux version 2.6.32-696.10.2.el6.i686 (mockbuild@c1bl.rdu2.centos.org) (gcc version 4.4.7 20120313 (Red Hat 4.4.7-18) (GCC) ) #1 SMP Tue Sep 12 13:54:13 UTC 2017\nInstall command : \nwget https:\/\/www.python.org\/ftp\/python\/3.5.4\/Python-3.5.4.tgz\ntar -zxvf Python-3.5.4.tgz\ncd Python-3.5.4\nmkdir \/usr\/local\/python3.5\n.\/configure --prefix=\/usr\/local\/python3.5\nError step :\nmake\ngcc -pthread -c -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes    -Werror=declaration-after-statement   -I. -I.\/Include    -DPy_BUILD_CORE \\\n      -DGITVERSION=\"\\\"LC_ALL=C \\\"\" \\\n      -DGITTAG=\"\\\"LC_ALL=C \\\"\" \\\n      -DGITBRANCH=\"\\\"LC_ALL=C \\\"\" \\\n      -o Modules\/getbuildinfo.o .\/Modules\/getbuildinfo.c\n\/bin\/sh: \/usr\/bin\/gcc: Permission denied\nmake: *** [Modules\/getbuildinfo.o] Error 126\n\nthe power of \/bin\/sh and \/usr\/bin\/gcc \n[root@iZ2814clj1uZ Python-3.5.4]# ll \/bin\/sh\nlrwxrwxrwx 1 root root 4 May 11  2017 \/bin\/sh -> bash\n[root@iZ2814clj1uZ Python-3.5.4]# ll \/bin\/bash\n-rwxr-xr-x 1 root root 872372 Mar 23  2017 \/bin\/bash\n[root@iZ2814clj1uZ Python-3.5.4]# ll \/usr\/bin\/gcc\n-rwxr-xr-x 2 root root 234948 Mar 22  2017 \/usr\/bin\/gcc\n\nI haved tried chmod 777 \/bin\/sh , \/bin\/bash , \/usr\/bin\/gcc  and reboot the system, but it doesn't work. Has anyone else had this problem with this ?\nThanks for any help\/suggestions.\n\nupdate 2017-11-13: selinux audit log \ntype=USER_AUTH msg=audit(1510502012.108:840): user pid=4273 uid=0 auid=4294967295 ses=4294967295 msg='op=PAM:authentication acct=\"root\" exe=\"\/usr\/sbin\/sshd\" hostname=[ip address1] addr=[ip address1] terminal=ssh res=success'\ntype=USER_ACCT msg=audit(1510502012.108:841): user pid=4273 uid=0 auid=4294967295 ses=4294967295 msg='op=PAM:accounting acct=\"root\" exe=\"\/usr\/sbin\/sshd\" hostname=[ip address1] addr=[ip address1] terminal=ssh res=success'\ntype=CRYPTO_KEY_USER msg=audit(1510502012.108:842): user pid=4273 uid=0 auid=4294967295 ses=4294967295 msg='op=destroy kind=session fp=? direction=both spid=4274 suid=74 rport=31432 laddr=[ip address] lport=5676  exe=\"\/usr\/sbin\/sshd\" hostname=? addr=[ip address1] terminal=? res=success'\ntype=USER_AUTH msg=audit(1510502012.108:843): user pid=4273 uid=0 auid=4294967295 ses=4294967295 msg='op=success acct=\"root\" exe=\"\/usr\/sbin\/sshd\" hostname=? addr=[ip address1] terminal=ssh res=success'\ntype=CRED_ACQ msg=audit(1510502012.109:844): user pid=4273 uid=0 auid=4294967295 ses=4294967295 msg='op=PAM:setcred acct=\"root\" exe=\"\/usr\/sbin\/sshd\" hostname=[ip address1] addr=[ip address1] terminal=ssh res=success'\ntype=LOGIN msg=audit(1510502012.109:845): pid=4273 uid=0 old auid=4294967295 new auid=0 old ses=4294967295 new ses=106\ntype=USER_START msg=audit(1510502012.111:846): user pid=4273 uid=0 auid=0 ses=106 msg='op=PAM:session_open acct=\"root\" exe=\"\/usr\/sbin\/sshd\" hostname=[ip address1] addr=[ip address1] terminal=ssh res=success'\ntype=USER_LOGIN msg=audit(1510502012.189:847): user pid=4273 uid=0 auid=0 ses=106 msg='op=login id=0 exe=\"\/usr\/sbin\/sshd\" hostname=[ip address1] addr=[ip address1] terminal=ssh res=success","AnswerCount":3,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":162,"Q_Id":47248056,"Users Score":0,"Answer":"Today,I found the answer. I haved install a security software, which prohibited create and excute binary file in the system directory. So I uninstalled it and my system back to normal.","Q_Score":1,"Tags":"python,linux,bash,gcc","A_Id":47265562,"CreationDate":"2017-11-12T11:07:00.000","Title":"Centos6.9 install python3.5 display error permission denied after make","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I've got a google app engine application that loads time series data real-time into a google datastore nosql style table. I was hoping to get some feedback around the right type of architecture to pull this data into a web application style chart (and ideally something I could also plug into a content management system like Word Press).\nMost of my server-side code is python. What's a reasonable client-server setup to pull the data from the datastore database and display into my webpage? Ideally I'd have something that scales and doesn't cause an unnecessary number of reads on my database (potentially using google-app-engine's built in caching\/etc).\nI'm guessing this is a common use-case but I'd like to get an idea of what might be some best practices around this. I've seen some examples using client web side javascript\/ajax with server side php to read the DB- is this really the best way?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":70,"Q_Id":47254930,"Users Score":0,"Answer":"Welcome to \"it depends\".\nYou have some choices. Imagine the classic four-quadrant chart. Along one axis is data size, along the other is staleness\/freshness.\nIf your time-series data changes rapidly but is small enough to safely be retrieved within a request, you can query for it on demand, convert it to JSON, and squirt it to the browser to be rendered by the JavaScript charting package of your choice. If the data is large, your app will need to do some sort of server-side pre-processing so that when the data is needed, it can be retrieved in sufficiently fewer requests that that the request won't time out. This might involve something data dependent like pre-bucketing the time series.  \nIf the data changes slowly, you have the option of generating your chart on the server side, perhaps using matplotlib. When new data is ingested, or perhaps at intervals, spawn off a task to generate and cache the chart (or JSON to hand to the front-end) as a blob in the datastore. If the data is sufficiently large that a task will timeout, you might need to use a backend process. If the data is sufficiently large and you don't pre-process, you're in the quadrant of unhappiness.\nIn my experience, GAE memcache is best for caching data between requests where the time between requests is very short. Don't rely on generating artifacts, stuff them in memcache and hoping that they'll be there a few minutes later. I've rarely seen that work.","Q_Score":0,"Tags":"python,wordpress,google-app-engine,charts,google-cloud-datastore","A_Id":47257054,"CreationDate":"2017-11-12T22:55:00.000","Title":"Load chart data into a webapp from google datastore","Data Science and Machine Learning":0,"Database and SQL":1,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"Non-zero exit code (1): \n  _pydevd_bundle\/pydevd_cython.c:13:20: fatal error: Python.h: No such file or directory\n  compilation terminated.\n  error: command 'x86_64-linux-gnu-gcc' failed with exit status 1\n\nPlease help me resolve this error of trying to install Cython in PyCharm.","AnswerCount":4,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":8886,"Q_Id":47257766,"Users Score":2,"Answer":"For python 3.7  sudo apt install libpython3.7-dev\nsolved my problem","Q_Score":38,"Tags":"python,python-3.x,compiler-errors,pycharm,cython","A_Id":61422234,"CreationDate":"2017-11-13T05:43:00.000","Title":"Compile Cython Extensions Error - Pycharm IDE","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm using VSCode on OSX to start python development. I'm supposed to be using python 3.6.xxxx but when I use python -V i get 2.7.10\nMy path variable is\n\nbash: \/Library\/Frameworks\/Python.framework\/Versions\/3.6\/bin:\/usr\/local\/bin:\/usr\/bin:\/bin:\/usr\/sbin:\/sbin:\/usr\/local\/share\/dotnet:\/Library\/Frameworks\/Mono.framework\/Versions\/Current\/Commands:\/Users\/leonardo\/.rbenv\/shims:\/Library\/Frameworks\/Python.framework\/Versions\/3.6\/bin:\/Users\/leonardo\/bin:\/Users\/leonardo\/bin: No such file or directory\n\nI also can't get pylint to work on VSCode because, when i try to install it, i complains that pip is unavailable...\nwhat should i do?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":420,"Q_Id":47264196,"Users Score":1,"Answer":"I manage to do it by going on VS Code Command Pallete (Command+Shift+P) and using the command Python: Select Interpreter and chose 3.6","Q_Score":1,"Tags":"python,macos,visual-studio-code","A_Id":47381497,"CreationDate":"2017-11-13T12:16:00.000","Title":"How to force python 3.6 on MAC OSX","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am working on a Windows computer and have been using Git Bash up until now without a problem. However, Git Bash seems to be missing some commands that Cygwin can provide, so I switched to Cygwin.\nI need to use AWS CLI with Cygwin but any time I input any aws command, I get the following error:\n\nC:\\users\\myusername\\appdata\\local\\programs\\python\\python36\\python.exe:\n  can't open file\n  '\/cygdrive\/c\/Users\/myusername\/AppData\/Local\/Programs\/Python\/Python36\/Scripts\/aws':\n  [Errno 2] No such file or directory\n\nI've seen other questions about getting Cygwin working with AWS, but they seem to talk about AWS CLI being incompatible with Windows' Anaconda version of Python (which mine doesn't seem to be). Any thoughts on how to fix this? Thanks.","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":942,"Q_Id":47289424,"Users Score":0,"Answer":"Ok, so I spent ages trying to do this as well because I wanted to get setup on the fast.ai course. Nothing seemed to work. However, I uninstalled Anaconda3 and installed Anaconda2 instead. That did the trick!","Q_Score":0,"Tags":"python,amazon-web-services,cygwin,aws-cli","A_Id":47595992,"CreationDate":"2017-11-14T15:24:00.000","Title":"AWS CLI not working in Cygwin","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am working on a Windows computer and have been using Git Bash up until now without a problem. However, Git Bash seems to be missing some commands that Cygwin can provide, so I switched to Cygwin.\nI need to use AWS CLI with Cygwin but any time I input any aws command, I get the following error:\n\nC:\\users\\myusername\\appdata\\local\\programs\\python\\python36\\python.exe:\n  can't open file\n  '\/cygdrive\/c\/Users\/myusername\/AppData\/Local\/Programs\/Python\/Python36\/Scripts\/aws':\n  [Errno 2] No such file or directory\n\nI've seen other questions about getting Cygwin working with AWS, but they seem to talk about AWS CLI being incompatible with Windows' Anaconda version of Python (which mine doesn't seem to be). Any thoughts on how to fix this? Thanks.","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":942,"Q_Id":47289424,"Users Score":0,"Answer":"You are mixing cygwin posix path with with a not cygwin Python.\nC:\\users\\myusername\\appdata\\local\\programs\\python\\python36\\python.exe \nIs not the cygwin python so it can't open the file as \n\/cygdrive\/c\/Users\/myusername\/AppData\/Local\/Programs\/Python\/Python36\/Scripts\/aws is not a windows path that it can understand . Only Cygwin programs understand it.\nTwo possible solutions:\n1 Use a windows path\n2 Use a cygwin Python","Q_Score":0,"Tags":"python,amazon-web-services,cygwin,aws-cli","A_Id":47312502,"CreationDate":"2017-11-14T15:24:00.000","Title":"AWS CLI not working in Cygwin","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Currently i have the stuff in place in my TFS like below :\n\nTFS Job calls powershell script1\npowershell script1 calls powershell script2 (having module)\nPowershell module calls the python script using Start process which returns the standard output through -RedirectStandardOutput. And the same is capturing\/returning to TFS.\n\nBut the thing is all the output from python script is returning in one go and not able to get the line by line logs to TFS instantly.\nCan anyone suggest if there is way to return the output from python script to TFS instantly line by line logs?","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":138,"Q_Id":47291361,"Users Score":1,"Answer":"You'd have to make the Start-Process call asynchronously either using Jobs or Runspaces, and then constantly monitor the job\/runspace child session for output to display.","Q_Score":0,"Tags":"python,powershell,tfs","A_Id":47295271,"CreationDate":"2017-11-14T17:01:00.000","Title":"Capturing the output from python script which called through powershell","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I installed Anaconda (python 3) on a Windows 10 machine. Whilst import pdb works inside a script I cant use pdb <script> on the command line. I would have thought is should work right out of the box. If not, what is the right way to install it on an Anaconda environment? I would also like to use ipdb.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":797,"Q_Id":47307882,"Users Score":2,"Answer":"Problem\npdb package comes with Anaconda 3's Python installation, so when you run import pdb in the command line it successfully loads it.\nRunning pdb <script> from command line makes Windows look for a pdb.exe executable in any of the paths listed in your PATH environment variable.\nAs far as I know, pdb does not come with a script executable. ipdb does.\n\nSolution\nPDB:\n\nRun python -m pdb myscript.py from an Anaconda terminal.\n\nIPDB:\n\nInstall the ipdb package in your Anaconda Python environment.\nTry running your script in the command line with ipdb <script>.\n\nIf the second step does not work for you, this is probably because the anaconda script folder does not appear in your PATH environment variable.\n\nPress winkey\nSearch for Edit the system environment variables \nClick on environment variables....\nLook for a PATH variable in either your user or system variables. (If it doesn't exist, create a new variable).\nDouble click it and add a new path pointing to your anaconda Scripts folder (for me it's in %localappdata%\\Continuum\\anaconda3\\Scripts).\n\nAnd you're done.","Q_Score":1,"Tags":"python,anaconda","A_Id":47308553,"CreationDate":"2017-11-15T12:49:00.000","Title":"Should pdb and ipdb be installed by Anaconda on Windows?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm running an Ubuntu 16.04 VM on Google Compute Engine. I've created a static IP address <my_static_ip_address> and my firewall settings allow tcp:80-8888.\nI started the Jupyter server within the docker image with\njupyter notebook --ip=0.0.0.0 --port=8888 --no-browser --allow-root\n \nand got this URL\nhttp:\/\/0.0.0.0:8888\/?token=8b26c453d278eae1da71b80f26a4ef8ea06734e5c636d897\n\nI'm not able to access from external browser with http:\/\/<my_static_ip_address>:8888 \nWhat am I missing?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":1502,"Q_Id":47335731,"Users Score":3,"Answer":"I started the Jupyter server within the docker image with\n\nWhat was the docker command you ran? A common gotcha here would be not mapping a host port to a container port. \nFor example, if you did this:\ndocker run -p 8888 jupyter\/notebook\nThen docker would assign a random host port mapping to port 8888 in the container. In this case, you can see what port was mapped by running docker ps. The port will be much higher than 8888 though, so you won't be able to reach jupyter because your firewall will block the traffic.\nWhat you probably want to do is go ahead and map a host port like so:\ndocker run -p 8888:8888 jupyter\/notebook\nThis should map any traffic reaching the GCE host on port 8888 to port 8888 in your jupyter container.","Q_Score":2,"Tags":"python,docker,virtual-machine,jupyter,gcp","A_Id":47336914,"CreationDate":"2017-11-16T17:25:00.000","Title":"Running Jupyter notebook in docker image on Google Cloud","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"My file is stored in the Microsoft Azure file service.\nQuestion\nHow can I get the size of the file?","AnswerCount":4,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":1697,"Q_Id":47361305,"Users Score":0,"Answer":"Thank you guys for the respond,\nThis one works:\nfile_service.get_share_stats(\"myShareName\")\nThe only thing it does not return the exact size, it rounded the size up to the nearest gigabyte.","Q_Score":0,"Tags":"python,azure","A_Id":47396410,"CreationDate":"2017-11-18T00:42:00.000","Title":"Size of a file stored at azure file service","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have added python36\/Scripts in the environment variable's path file and python36 as well is added. But it still shows the following error\nCommand = C:\\Users\\Sonalika\\dev\\trydjango1-11>virtualenv -p python3\nError I receive:\n\nThe path python3 (from --python=python3) does not exist","AnswerCount":6,"Available Count":3,"Score":0.0,"is_accepted":false,"ViewCount":52786,"Q_Id":47369737,"Users Score":0,"Answer":"Try running this command virtualenv -p python env\ni.e without specifying python3, i had same problem while using pycharm and after running this command on the terminal the error was resolved.","Q_Score":19,"Tags":"django,python-3.x,virtualenv","A_Id":54036952,"CreationDate":"2017-11-18T18:44:00.000","Title":"\"The path python3 (from --python=python3) does not exist\" error","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have added python36\/Scripts in the environment variable's path file and python36 as well is added. But it still shows the following error\nCommand = C:\\Users\\Sonalika\\dev\\trydjango1-11>virtualenv -p python3\nError I receive:\n\nThe path python3 (from --python=python3) does not exist","AnswerCount":6,"Available Count":3,"Score":0.0,"is_accepted":false,"ViewCount":52786,"Q_Id":47369737,"Users Score":0,"Answer":"When you open your Command Prompt window, make sure to select \"Run as administrator\"","Q_Score":19,"Tags":"django,python-3.x,virtualenv","A_Id":54619898,"CreationDate":"2017-11-18T18:44:00.000","Title":"\"The path python3 (from --python=python3) does not exist\" error","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have added python36\/Scripts in the environment variable's path file and python36 as well is added. But it still shows the following error\nCommand = C:\\Users\\Sonalika\\dev\\trydjango1-11>virtualenv -p python3\nError I receive:\n\nThe path python3 (from --python=python3) does not exist","AnswerCount":6,"Available Count":3,"Score":0.0665680765,"is_accepted":false,"ViewCount":52786,"Q_Id":47369737,"Users Score":2,"Answer":"if you have already python in you PATH, sure it works by default with python, no python3.\nyou just have to run virtualenv -p python env","Q_Score":19,"Tags":"django,python-3.x,virtualenv","A_Id":54673747,"CreationDate":"2017-11-18T18:44:00.000","Title":"\"The path python3 (from --python=python3) does not exist\" error","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I want to change the default python version I use, without affecting any other defaults. Appending the python path to the $PATH environment variable only accomplishes that as long as there is only the python executable at that given location, which is not the case if I want to use the \/usr\/bin version (export PATH=\\usr\\bin:$PATH). \nI know I could theoretically create a symbolic link in some other folder of my choosing, but this is not very elegant.\nIs there any other way of changing the default python (like a nice environment variable that python uses which takes precedence over the $PATH environment variable)?","AnswerCount":3,"Available Count":1,"Score":0.0665680765,"is_accepted":false,"ViewCount":637,"Q_Id":47391785,"Users Score":1,"Answer":"In general, Python itself does not provide any way to do this. Once Python starts up, there is already one particular version running, and it can't change to a different version on the fly.\nYour operating system may provide some way of choosing which version of Python is the default (e.g. eselect python on Gentoo Linux), but it's impossible to say whether that's the case for you without knowing what OS you're using. If your OS doesn't provide something like this, it is possible to make your own scripts to set and change a default Python version.","Q_Score":1,"Tags":"python","A_Id":47391863,"CreationDate":"2017-11-20T12:13:00.000","Title":"Changing the default python without changing the $PATH variable?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have created a python tool which generates shell script & run it using command\nsubprocess.Popen(\"csh -l -c \" + os.environ[\"TEMP\"] + \"\\qa_tool\\oos_script_generator.csh\")\nThis runs in c-shell. Is there any way I can run same script in cygwin?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":377,"Q_Id":47406736,"Users Score":0,"Answer":"You may have figured this out by now, but I believe tcsh is available in the package list, have you tried installing it to see if it fits your need?","Q_Score":0,"Tags":"python-2.7,cygwin","A_Id":47559740,"CreationDate":"2017-11-21T06:39:00.000","Title":"Run shell script(.csh) in cygwin using python","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"So I'm trying to get a working code in Python that will eject\/unmount all USB flash drives attached to the Pi (Running Raspbian) - so that they can be removed safely. The final code will be run from within the python program. \nAdditionally, I'd like to eject\/unmount the USB flash drive even if it's in use. \nI've looked around and can't see how to do this. Thanks. \n\nudisks --detach \/media\/pi\/DOCS\/ - 'Blocked device... Resource temporarily available'... \nudisks --detach \/media\/pi\/ - 'Blocked device...Resource temporarily available'... \nudisks --detach \/media\/ - 'Blocked device...Resource temporarily available'... \nsudo udisks --detach \/media\/pi\/DOCS\/ - still blocked...\nsudo umount \/path\/to\/devicename - command not found...\neject \/media\/pi\/DOCS\/ - Unable to open '\/dev\/sda'\n(DOCS is the name if my USB flash drive. - though I want to eject all USB flash drives - not just my one)\n\nSo I'm going to ask the user in Python to select their USB flash drive from a list, which is pretty easy (just read in the folder) - so I will have the pathway to the USB. I'm still not sure which code can safely disconnect the USB flash drive - Maybe more research is the answer. Thanks for your help so far.","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":6438,"Q_Id":47418025,"Users Score":2,"Answer":"For udisks --detach the parameter should be the device, not the mounting point.\nFor example, if the USB Disk is \/dev\/sdb the command would be udisks --detach \/dev\/sdb\nIf the command still doesn't work you could try udiskctl power-off -b <device> which should also work.","Q_Score":2,"Tags":"bash,python-3.x,raspberry-pi,raspbian","A_Id":47431418,"CreationDate":"2017-11-21T16:30:00.000","Title":"Ejecting\/unmounting random USB flash drive in Raspberry pi \/ Python","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have python 3.6 installed on my computer with Windows 10. Python 3.6 is in the path: \n\nC:\\Users\\linekm475\\AppData\\Local\\Programs\\Python\\Python36-32\n\nand I added a path so it works to just type in \"python\" in cmd to open python 3.6 in cmd. And the problem I have now is that I want to have python 2.7 installed too so I can use both of them. So I installed python 2.7 and it's in the path:\n\nC:\\Users\\linekm475\\AppData\\Local\\Programs\\Python\\Python27\n\nIs it possible to do so when I type something like \"python27\" in cmd that it opens up python 2.7?","AnswerCount":3,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":3080,"Q_Id":47422326,"Users Score":0,"Answer":"The easiest way (assuming you're only doing this from the CLI) is to use a doskey alias.  In your case it would be something like \ndoskey python27=C:\\Users\\linekm475\\AppData\\Local\\Programs\\Python\\Python27\nPlease note that there are some serious limitations to doskey macros (most notably that it can only be used from the command line, not from a script or batch file, nor can they be used on either side of a pipe), but it will accomplish what you're trying to do.","Q_Score":0,"Tags":"python,python-3.x,python-2.7","A_Id":47422425,"CreationDate":"2017-11-21T20:41:00.000","Title":"Run python 3.6 and 2.7 on the same computer","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am using airflow to schedule a spark job, I need to got a DAG \"run continuously\" -- Like I just want a DAG to run, and when it finishes, to start a new DAG instance again.\n\nI have two options in my mind:\n1. Allow only one DAG instance running at a time and run the DAG more frequently\n2. Have another DAG to watch and kick off when it is needed.\n\nHave anyone implement it? Suggestions? Thanks!","AnswerCount":2,"Available Count":1,"Score":-1.0,"is_accepted":false,"ViewCount":1128,"Q_Id":47422401,"Users Score":-4,"Answer":"Why do you need airflow to do that? \nYou could implement an infinite loop in your spark job. It seems more efficient.","Q_Score":1,"Tags":"python,airflow,apache-airflow","A_Id":47440562,"CreationDate":"2017-11-21T20:46:00.000","Title":"How to set airflow DAG runs continuously","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am not sure what it is called. I have seen a installer program have stored data at the end of the installer script, looked like just a mess of random text, which then got turn into a seperate file upon running the installer. There was some comand that said something like line xxx -> end | file.txt. Im so sorry if this makes no sense but if anyone knows what I am looking for id like to do the same thing in a python script. directions to a resource or an explination on how to do it here would be great thanks.","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":41,"Q_Id":47422506,"Users Score":0,"Answer":"One reason shell scripts do this is that a shell variable cannot contain arbitrary binary data (namely, null bytes). Python variables have no such limitations; just store the data in a variable.","Q_Score":0,"Tags":"python,python-3.x,file,io","A_Id":47422562,"CreationDate":"2017-11-21T20:52:00.000","Title":"Store a file insde python file","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Is there a difference between using os.getlogin() and os.environ for getting the current user's username on Linux?\nAt different times I've seen someone recommend looking at the environment variables $USER or $LOGNAME, and other times os.getlogin() was recommended.\nSo I'm curious: is one preferred, or are there situations where you would use one over the other, or are they simply two ways of doing the same thing?","AnswerCount":3,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":9908,"Q_Id":47444178,"Users Score":0,"Answer":"I guess in UNIX based systems it really just comes down to personal preference. I'd use os.getlogin() if I plan to write the code for other platforms such as windows. Moreover, enviroment variables and easier be manipulated. so it's more secure to use it in cases where security is a priority.","Q_Score":7,"Tags":"python,linux,python-3.x,python-os","A_Id":47444271,"CreationDate":"2017-11-22T21:32:00.000","Title":"Difference between os.getlogin() and os.environ for getting Username","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm wondering how I could run python3 by default when I type python in windows CMD?\nThis is not a duplicated question because I've added the C:\\Python36 to the path variables, so when I type py in CMD, it gives me python 3.6.2, while if I type py2, then it gives me python 2.7.11. \nSince now I need to run python script.py through another application, then I can't really change the command to be py script.py, so my question is how could I run python 3  if using the command python script.py? I've tried to place the python3 preceeding python2 like C:\\Python36;C:\\Python27 in the variables, but when I type python, CMD still shows python 2.7.11...I'm confused about why it didn't work..\nThank you very much in advance!","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":100,"Q_Id":47454016,"Users Score":0,"Answer":"OK! I figured out the issue - The python36 folder was not placed in the C: location. Now I've corrected it and it's working for me! Thanks!","Q_Score":0,"Tags":"windows,python-3.x,variables,cmd,path","A_Id":47454887,"CreationDate":"2017-11-23T11:06:00.000","Title":"How to run Python 3 when I type \"python\" in windows CMD","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"How can I easily copy a local file to a remote server using python?\nI don't want to map the drive to my local machine and the windows server requires a username and password.\nThe local machine is also a windows machine.\nExamples I've seen are with linux and mapping the drive. Unfortunately that's not an option for me.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":749,"Q_Id":47458024,"Users Score":0,"Answer":"You can use the subprocess module or os.system to launch a command into a windows shell. Then you can use Powershell or cmd instructions.","Q_Score":0,"Tags":"python,windows,server","A_Id":47458154,"CreationDate":"2017-11-23T14:41:00.000","Title":"Transfer file from local machine to remote windows server using python","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a open() command in my Python script which opens the file data.json in my Apache serve running on Raspberry Pi in w mode. This script in turn is run by PHP using the shell_exec command. When the script is run alone, the Python code works. However, it does not function when run by PHP. Does anyone have any idea why this is happening, or is more information needed? Thank you in advance for your help!","AnswerCount":2,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":165,"Q_Id":47463593,"Users Score":0,"Answer":"Thank you to user2693053 for solving this problem:\n\nSounds like a privilege issue, although I am not experienced enough\n  with calling Python from php to know whether that could be an issue\n  here.\n\nand yes, it is a privilege issue! I fixed the problem by doing the sudo chmod 777 * command in the \/var\/www\/html directory.","Q_Score":0,"Tags":"php,python,json,apache,file-io","A_Id":47467584,"CreationDate":"2017-11-23T21:44:00.000","Title":"Python open() function not working when script executed by shell_exec() in PHP","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a open() command in my Python script which opens the file data.json in my Apache serve running on Raspberry Pi in w mode. This script in turn is run by PHP using the shell_exec command. When the script is run alone, the Python code works. However, it does not function when run by PHP. Does anyone have any idea why this is happening, or is more information needed? Thank you in advance for your help!","AnswerCount":2,"Available Count":2,"Score":0.0996679946,"is_accepted":false,"ViewCount":165,"Q_Id":47463593,"Users Score":1,"Answer":"Did you use the relative or absolute path?\nTry to use the absolute path and check what's your working directory.\nI think you are starting the python script not in the directory you think you are. :)","Q_Score":0,"Tags":"php,python,json,apache,file-io","A_Id":47464087,"CreationDate":"2017-11-23T21:44:00.000","Title":"Python open() function not working when script executed by shell_exec() in PHP","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Can someone example to me how CSRF works in the cluster setup?\nI have a kubernetes cluster hosting a django website, and I'm having some occasional issues with 403 errors. I have multiple instances of the site load balanced in kubernetes.\nHow does CSRF work when a POST is sent from 1 instance and handled by another?\nDoes CSRF site work if the docker images are updated during the time the form is being filled out?\nThanks!","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":723,"Q_Id":47479541,"Users Score":0,"Answer":"You should disable CSRF for every instance, and manage the CSRF security from the API Gateway","Q_Score":1,"Tags":"python,django,docker,kubernetes","A_Id":47479929,"CreationDate":"2017-11-24T20:19:00.000","Title":"Django CSRF in a cluster","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"Can someone example to me how CSRF works in the cluster setup?\nI have a kubernetes cluster hosting a django website, and I'm having some occasional issues with 403 errors. I have multiple instances of the site load balanced in kubernetes.\nHow does CSRF work when a POST is sent from 1 instance and handled by another?\nDoes CSRF site work if the docker images are updated during the time the form is being filled out?\nThanks!","AnswerCount":2,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":723,"Q_Id":47479541,"Users Score":1,"Answer":"Can someone example to me how CSRF works in the cluster setup?\n\nExactly the same way it usually ought not to (CSRF is Cross Site Request Forgery, i.e. the attack). To protect against it, you hand out secret tokens to your clients which they must include with subsequent requests. Your backend must validate that the tokens are valid, applicable and were, in fact, issued by a trusted source. There's a few ways to do that bit:\n\nYou can use MACs for that (in which case you have something pretty close to JSON WebTokens). \nYou can save your tokens to some trusted store and query that store on subsequent requests.\n\nThat is pretty much all there is to it.\nSince your CSRF protection emerges from the combination of choices you made above, how to make it work in a distributed setup also depends on the specific implementation of the CSRF protection scheme.\nGoing by the Django docs, the default way to do it uses a 'secret' which is reset every time a user logs in. That means if hitting a different server for two subsequent requests triggers a new log in, all old CSRF tokens are effectively invalidated. So based on that: \n\nYou need to adapt your Django project to make sure different instances can resume working with the same session, and a re-login is not triggered \nAll your Django instances need to be able to access the same per log-in secret, so that any one of them can validate a CSRF token issued by any other.","Q_Score":1,"Tags":"python,django,docker,kubernetes","A_Id":47479741,"CreationDate":"2017-11-24T20:19:00.000","Title":"Django CSRF in a cluster","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I have a shortcut which runs python3 in a terminal window. I would like to add some import commands to a python script which is to be run when python starts.\nHow can I do this?\neg; I have xfce4-terminal -e python3 which starts a graphical terminal session with python3 running. I want to add something to this to make python3 execute a script, however I do not want python to exit at the end of the script, which is the default behaviour if a filename is given immediatly following the python3 command.","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":45,"Q_Id":47487870,"Users Score":1,"Answer":"See python --help. It mentions an environment variable called PYTHONSTARTUP which looks like it could help you get where you want.","Q_Score":0,"Tags":"python-3.x","A_Id":47487950,"CreationDate":"2017-11-25T16:00:00.000","Title":"python3: How can I run a python script when python starts?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am getting the following error when I attempt to install gulp-converter-tjs\nusing npm install -g gulp-converter-tjs\nIt looks like I am missing python but the path is correct for python.exe . I can even run python command from my cmd and also enviroment variables are set.\nAny suggestions?\n\nC:\\Users\\themhz\\AppData\\Roaming\\npm\\node_modules\\gulp-converter-tjs\\node_modules\\iconv>if\n  not defined npm_config_node_gy p (node\n  \"C:\\Users\\themhz\\AppData\\Roaming\\npm\\node_modules\\npm\\bin\\node-gyp-bin....\\node_modules\\node-gyp\\bin\\node-gyp\n  .js\" rebuild ) else (node \"\" rebuild ) gyp ERR! configure error gyp\n  ERR! stack Error: Can't find Python executable\n  \"C:\\Users\\themhz\\AppData\\Local\\Programs\\Python\\Python36-32\\python.exe\n  \", you can set the PYTHON env variable. gyp ERR! stack at\n  PythonFinder.failNoPython\n  (C:\\Users\\themhz\\AppData\\Roaming\\npm\\node_modules\\npm\\node_modules\\node-\n  gyp\\lib\\configure.js:483:19) gyp ERR! stack at PythonFinder.\n  (C:\\Users\\themhz\\AppData\\Roaming\\npm\\node_modules\\npm\\node_modules\\node-g\n  yp\\lib\\configure.js:509:16) gyp ERR! stack at\n  C:\\Users\\themhz\\AppData\\Roaming\\npm\\node_modules\\npm\\node_modules\\graceful-fs\\polyfills.js:284:29\n  gyp ERR! stack at FSReqWrap.oncomplete (fs.js:152:21) gyp ERR! System\n  Windows_NT 10.0.15063 gyp ERR! command \"C:\\Program\n  Files\\nodejs\\node.exe\"\n  \"C:\\Users\\themhz\\AppData\\Roaming\\npm\\node_modules\\npm\\nod\n  e_modules\\node-gyp\\bin\\node-gyp.js\" \"rebuild\" gyp ERR! cwd\n  C:\\Users\\themhz\\AppData\\Roaming\\npm\\node_modules\\gulp-converter-tjs\\node_modules\\iconv\n  gyp ERR! node -v v8.9.1 gyp ERR! node-gyp -v v3.6.2 gyp ERR! not ok\n  npm ERR! code ELIFECYCLE npm ERR! errno 1 npm ERR! iconv@2.3.0\n  install: node-gyp rebuild npm ERR! Exit status 1 npm ERR! npm ERR!\n  Failed at the iconv@2.3.0 install script. npm ERR! This is probably\n  not a problem with npm. There is likely additional logging output\n  above.\nnpm ERR! A complete log of this run can be found in: npm ERR!\n  C:\\Users\\themhz\\AppData\\Roaming\\npm-cache_logs\\2017-11-25T15_20_09_146Z-debug.log\n\nMy machine is running \nwindows 10\nnpm -v 5.5.1\nnode -v v8.9.1\nPython3","AnswerCount":2,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":3675,"Q_Id":47494142,"Users Score":7,"Answer":"For those who encounter this problem in future, you can save yourself some time and let npm install all necessary programs by running: \nnpm install --global --production windows-build-tools\nNote: you need to run this command as administrator","Q_Score":1,"Tags":"python,node.js,npm,gulp","A_Id":47526432,"CreationDate":"2017-11-26T08:04:00.000","Title":"Can't find Python executable when installing gulp-converter-tjs","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am getting the following error when I attempt to install gulp-converter-tjs\nusing npm install -g gulp-converter-tjs\nIt looks like I am missing python but the path is correct for python.exe . I can even run python command from my cmd and also enviroment variables are set.\nAny suggestions?\n\nC:\\Users\\themhz\\AppData\\Roaming\\npm\\node_modules\\gulp-converter-tjs\\node_modules\\iconv>if\n  not defined npm_config_node_gy p (node\n  \"C:\\Users\\themhz\\AppData\\Roaming\\npm\\node_modules\\npm\\bin\\node-gyp-bin....\\node_modules\\node-gyp\\bin\\node-gyp\n  .js\" rebuild ) else (node \"\" rebuild ) gyp ERR! configure error gyp\n  ERR! stack Error: Can't find Python executable\n  \"C:\\Users\\themhz\\AppData\\Local\\Programs\\Python\\Python36-32\\python.exe\n  \", you can set the PYTHON env variable. gyp ERR! stack at\n  PythonFinder.failNoPython\n  (C:\\Users\\themhz\\AppData\\Roaming\\npm\\node_modules\\npm\\node_modules\\node-\n  gyp\\lib\\configure.js:483:19) gyp ERR! stack at PythonFinder.\n  (C:\\Users\\themhz\\AppData\\Roaming\\npm\\node_modules\\npm\\node_modules\\node-g\n  yp\\lib\\configure.js:509:16) gyp ERR! stack at\n  C:\\Users\\themhz\\AppData\\Roaming\\npm\\node_modules\\npm\\node_modules\\graceful-fs\\polyfills.js:284:29\n  gyp ERR! stack at FSReqWrap.oncomplete (fs.js:152:21) gyp ERR! System\n  Windows_NT 10.0.15063 gyp ERR! command \"C:\\Program\n  Files\\nodejs\\node.exe\"\n  \"C:\\Users\\themhz\\AppData\\Roaming\\npm\\node_modules\\npm\\nod\n  e_modules\\node-gyp\\bin\\node-gyp.js\" \"rebuild\" gyp ERR! cwd\n  C:\\Users\\themhz\\AppData\\Roaming\\npm\\node_modules\\gulp-converter-tjs\\node_modules\\iconv\n  gyp ERR! node -v v8.9.1 gyp ERR! node-gyp -v v3.6.2 gyp ERR! not ok\n  npm ERR! code ELIFECYCLE npm ERR! errno 1 npm ERR! iconv@2.3.0\n  install: node-gyp rebuild npm ERR! Exit status 1 npm ERR! npm ERR!\n  Failed at the iconv@2.3.0 install script. npm ERR! This is probably\n  not a problem with npm. There is likely additional logging output\n  above.\nnpm ERR! A complete log of this run can be found in: npm ERR!\n  C:\\Users\\themhz\\AppData\\Roaming\\npm-cache_logs\\2017-11-25T15_20_09_146Z-debug.log\n\nMy machine is running \nwindows 10\nnpm -v 5.5.1\nnode -v v8.9.1\nPython3","AnswerCount":2,"Available Count":2,"Score":-0.0996679946,"is_accepted":false,"ViewCount":3675,"Q_Id":47494142,"Users Score":-1,"Answer":"I installed the Python 2.7 version and then I installed the visual studio 2017 community edition in order to get the c++ and the .net framework libraries.","Q_Score":1,"Tags":"python,node.js,npm,gulp","A_Id":47513927,"CreationDate":"2017-11-26T08:04:00.000","Title":"Can't find Python executable when installing gulp-converter-tjs","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am developing a custom GIMP plugin on Mac OS X. For programming reasons, I need to use some python modules that I have installed in system's default python environment (such as OpenCV, MoviePy, and some others), but I am unable to import them on the Python-Fu console because it uses the GIMP's app built-in python environment. My question is. Is there a way to tell GIMP to use another python interpreter? I've searched on GIMP preferences but I haven't found anything such as Python-Fu path or something similar.\nGIMP's Python interpreter is found here on my system: \/Applications\/GIMP.app\/Contents\/MacOS\/python\nThe interpreter that I want GIMP to use is found here on my system: \/usr\/bin\/python\nThanks!","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":839,"Q_Id":47495484,"Users Score":0,"Answer":"See \/usr\/lib\/gimp\/2.0\/interpreters\/pygimp.interp (or wherever this is in your Gimp installation directory). You can tweak this to use another Python instance (but it still has to be 2.7.x). On the other hand Gimp's own Python interpreter is the standard cpython, you can use it directly in the command line and can likely tweak pip  to install modules for it (or add the modules installed on the other instance to it).","Q_Score":0,"Tags":"python,python-2.7,gimp,pythonpath","A_Id":47496643,"CreationDate":"2017-11-26T11:12:00.000","Title":"Change Gimp python interpreter path","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am starting the Docker tutorial with the Python app and would like to know what is the meaning of \"Python runtime\" in this context:\nIn the past, if you were to start writing a Python app, your first order of business was to install a Python runtime onto your machine. But, that creates a situation where the environment on your machine has to be just so in order for your app to run as expected; ditto for the server that runs your app.\n\nWith Docker, you can just grab a portable Python runtime as an image,\n  no installation necessary. Then, your build can include the base\n  Python image right alongside your app code, ensuring that your app,\n  its dependencies, and the runtime, all travel together.\n\nSo I guess what it mean is the \"Python runtime\" is like the configuration of your local Python.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":202,"Q_Id":47497482,"Users Score":0,"Answer":"When it says \"Python runtime,\" it just means the Python interpreter in a binary format and its local configuration of package dependencies. Your interpretation is correct.","Q_Score":0,"Tags":"python,docker","A_Id":47497796,"CreationDate":"2017-11-26T15:01:00.000","Title":"What does the Docker tutorial mean by \"grab a portable Python runtime as an image\"?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have multiple write-heavy Python applications (producer1.py, producer2.py, ...) and I'd like to implement an asynchronous, non-blocking writer (consumer.py) as a separate process, so that the producers are not blocked by disk access or contention.\nTo make this more easily optimizable, assume I just need to expose a logging call that passes a fixed length string from a producer to the writer, and the written file does not need to be sorted by call time. And the target platform can be Linux-only. How should I implement this with minimal latency penalty on the calling thread?\nThis seems like an ideal setup for multiple lock-free SPSC queues but I couldn't find any Python implementations.\n\nEdit 1\nI could implement a circular buffer as a memory-mapped file on \/dev\/shm, but I'm not sure if I'll have atomic CAS in Python?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":173,"Q_Id":47547731,"Users Score":1,"Answer":"The simplest way would be using an async TCP\/Unix Socket server in consumer.py.\nUsing HTTP will be an overhead in this case.  \nA producer, TCP\/Unix Socket client, will send data to consumer then consumer will respond right away before writing data in disk drive.\nFile IO in consumer are blocking but it will not block producers as stated above.","Q_Score":0,"Tags":"python,multithreading,asynchronous,ipc,interprocess","A_Id":47558211,"CreationDate":"2017-11-29T07:59:00.000","Title":"Interprocess communication with SPSC queue in python","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am tying to use pyfmi on our universities Linux HPC cluster. Building the FMILibrary and also installing pyfmi does not throw any error. However I get the below error message when trying to import pyfmi in python:\nFile \"\/home\/user\/.local\/lib\/python2.7\/site-packages\/pyfmi\/init.py\", line 24, in \n    from .fmi import FMUModel, load_fmu, FMUModelME1, FMUModelME2\nImportError: \/home\/user\/.local\/lib\/python2.7\/site-packages\/pyfmi\/fmi.so: undefined symbol: __intel_sse2_strcpy\nDoes anyone have an idea what the reason might be?\nThanks in advance!","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":520,"Q_Id":47579464,"Users Score":1,"Answer":"Meanwhile I solved the above problem.\npyfmi was built from source using the intel compiler instead of gcc. So with:\nmodule switch intel gcc\nthis error didnt occur anymore.","Q_Score":0,"Tags":"python,fmi,jmodelica","A_Id":47597565,"CreationDate":"2017-11-30T17:39:00.000","Title":"ImportError with pyfmi","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm in the middle of making a Python script to shutdown, restart, hibernate or put to sleep after a few seconds. \nI know its subprocess.call([\"shutdown\", \"\/s\"]) to shutdown, \"\/r\" to restart and \"\/h\" to hibernate.\nHow can you put the computer to sleep using call() on Windows 10?","AnswerCount":2,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":909,"Q_Id":47599936,"Users Score":2,"Answer":"Shutdown doesn't have a function for Sleep integrated however you can use the following: rundll32.exe powrprof.dll,SetSuspendState 0,1,0","Q_Score":2,"Tags":"python,windows,shutdown,sleep-mode","A_Id":47599973,"CreationDate":"2017-12-01T19:06:00.000","Title":"How to put computer to sleep using subprocess.call?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I installed virtualenv on fedora 26 using pip3 install --user virtualenv. System has both python 2.7 and python 3.6.\nWhen I am creating a \"virtualenv venv\", I am getting this output and error.\n\nNew python executable in \/home\/asraisingh\/venv\/bin\/python2 \n  Also creating executable in \/home\/asraisingh\/venv\/bin\/python\n  Installing setuptools, pip, wheel...\n   Complete output from command \/home\/asraisingh\/venv\/bin\/python2 - setuptools pip wheel:\n   Traceback (most recent call last):\n   File \"\", line 7, in \n   File \"\/home\/asraisingh\/.local\/lib\/python2.7\/site-packages\/virtualenv_support\/pip-9.0.1-py2.py3-none-any.whl\/pip\/init.py\", line 7, in \n   File \"\/usr\/lib64\/python2.7\/optparse.py\", line 77, in \n     import textwrap\n   File \"\/usr\/lib64\/python2.7\/textwrap.py\", line 10, in \n     import string, re\nFile \"string.py\", line 1\n     KDE: 9\n        ^\n  SyntaxError: invalid syntax\n  ----------------------------------------\n  ...Installing setuptools, pip, wheel...done.\n  Traceback (most recent call last):\n   File \"\/home\/asraisingh\/.local\/bin\/virtualenv\", line 11, in \n     sys.exit(main())\n   File \"\/home\/asraisingh\/.local\/lib\/python2.7\/site-packages\/virtualenv.py\", line 713, in main\n     symlink=options.symlink)\n   File \"\/home\/asraisingh\/.local\/lib\/python2.7\/site-packages\/virtualenv.py\", line 945, in create_environment\n     download=download,\n   File \"\/home\/asraisingh\/.local\/lib\/python2.7\/site-packages\/virtualenv.py\", line 901, in install_wheel\n     call_subprocess(cmd, show_stdout=False, extra_env=env, stdin=SCRIPT)\n   File \"\/home\/asraisingh\/.local\/lib\/python2.7\/site-packages\/virtualenv.py\", line 797, in call_subprocess\n     % (cmd_desc, proc.returncode))\n  OSError: Command \/home\/asraisingh\/venv\/bin\/python2 - setuptools pip wheel failed with error code 1","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":713,"Q_Id":47606219,"Users Score":1,"Answer":"Check if you have a file named string.py in your current working directory.\nIf so, rename, move, or delete it. This should solve your problem.","Q_Score":0,"Tags":"python,virtualenv,fedora-26,pip3","A_Id":47606470,"CreationDate":"2017-12-02T09:01:00.000","Title":"Getting error while using virtualenv venv on fedora 26","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm on Linux Mint running VSCode and I was somehow able to run a terminal not as a separate window but right below an open Python file.  Seems to be easy on Win\/OSX (Ctrl\/Cmd+J and select Terminal tab) but not specifically a feature that I can choose when I'm on a Linux machine.  Any special keys to bring it back?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":81,"Q_Id":47626377,"Users Score":0,"Answer":"In general, Ctrl-` opens the integrated terminal in VS Code. Otherwise look under the View menu for the Integrated Terminal option. If you're looking for Python-specific options, there are Run Python File in Terminal and Run Python Selection\/Line in Terminal commands from the command palette.","Q_Score":0,"Tags":"python,linux,visual-studio-code","A_Id":47643346,"CreationDate":"2017-12-04T04:11:00.000","Title":"Run terminal inside VS Code for python script?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I read many answers on this topic.\nIt seems that they try to explain it with much more difficult illustrations or just saying it's deprecated consulting official documentation.\nos.system is handy for beginner.\nCould the reason be explained in an easy example o a metaphor?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":36,"Q_Id":47634574,"Users Score":3,"Answer":"One example of many is that subprocess.run() can capture the output, while os.system() only captures the return code.\nsubprocess.run() is simply way more flexible. It can do everything that os.system() can but also way more. If you KNOW that you never will use any of the benefits in subprocess.run(), then by all means, use os.system(), but most people would say that it's a bit of a waste of time to learn two different tools for the same thing.\nos.system() is pretty much a copy of system() in C.","Q_Score":1,"Tags":"python,os.system","A_Id":47634691,"CreationDate":"2017-12-04T13:34:00.000","Title":"The reason 'subprocess.run' is better than 'os.system' for beginner","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I currently have a Python script that scrapes some data from the internet, then saves it as a pickle file. When running this from a terminal with python filename.py it saves correctly, since the Date Modified field of the pickle file changes. However, when running with the built-in scheduler it doesn't actually save the pickle file, since the Date Modified isn't changed, despite seeing the Python script being executed (terminal opens up and I see the script running). \nI ticked the Run with highest privileges box in the scheduler, and despite that it doesn't save the pickle file. I thought it had to do with it not having write permission, but if it has the highest priviliges, surely it can save a file? \nAt the scheduled time a terminal opens, so I know it is actually being executed (print a message to make sure), but it doesn't show an error about the fact that it couldn't save the file or anything like that. The only reason I know it's not working is the Date Modified field not changing. How can I fix this?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":730,"Q_Id":47652642,"Users Score":2,"Answer":"Windows Task Scheduler has a default working directory of C:\\Windows\\System32. If you set a relative path to the file you are trying to write, it will likely be written into that directory. If you open a Command Prompt in the directory of your script and run it, the relative path will be that directory. So, you actually have two copies of the pickle file.\nIf you set an absolute path in your script to the file you want to write to, both methods of running your script will write to the same file.","Q_Score":0,"Tags":"python,scheduled-tasks","A_Id":47653341,"CreationDate":"2017-12-05T11:34:00.000","Title":"Windows scheduler with Python script that saves a file","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"To start off, I am a complete noob to Debian, Python, and shell scripts, so please speak to me like I am a toddler.\nI have a python script I am running through a virtualenv, and I want to execute it via a shell script. Here is what I'm typing in to the terminal to do so:\n\nsource .profile\nworkon cv\ncd Desktop\/Camera\npython main.py\nI tried turning this into a shell script, but I receive the error -- source: not found\nI've found no answer to my problem, at least not in any terms I can understand. Any advice would be appreciated. Furthermore, before you answer, I also have no idea why it is I need to execute source .profile, I'm simply following a beginner guide for the project which can be found here: https:\/\/www.hackster.io\/hackerhouse\/smart-security-camera-90d7bd\nThanks in advance, and sorry if this is a dumb question.","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":977,"Q_Id":47682666,"Users Score":0,"Answer":"Best practice for Shell would be shebang at the begging like @Veda suggested.\nExecute the shell script using bash like bash shell.sh as the link suggests using relative locations rather than absolute ones","Q_Score":0,"Tags":"python,bash,shell","A_Id":47682968,"CreationDate":"2017-12-06T20:09:00.000","Title":"Unable to source .profile in shell script","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"The command line of an application built with cx_Freeze can be hidden with Win32GUI.\nWhy does cx_Freeze choose to reference Win32GUI rather than Win64GUI?\nThis suggests that cx_Freeze has either not been updated to include this feature, or is calling a 32 bit command and yet almost all Windows computers are now 64 bit.  \nIs there a reason why the inplamenters chose to call it this?\nI have researched for a long time but have not found any answer, any thoughts would be appreciated.  Thank you.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":1399,"Q_Id":47703965,"Users Score":1,"Answer":"It is simply because that is how it started. Even now it is called the \"Win32\" subsystem, even though it is 64-bit!","Q_Score":0,"Tags":"python,cx-freeze","A_Id":47725348,"CreationDate":"2017-12-07T21:18:00.000","Title":"Why does cx_Freeze use Win32GUI rather than Win64GUI?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":1,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Wondering if anyone can shed light on this issue I am having.\nI have two python scripts which I want to run when anyone logs into the computer. I have added the scripts to the Startup folder for all users. When I log in the scripts should run with pythonw.exe, both scripts have the pyw extension.\nWhen I log in to my own account, it will only start one script. When I log in to a guest account both scripts start fine.\nI have checked AV and the script is not being blocked. Both files access a txt file on the C: drive. I have ensured all users have permissions to access the files. \nI can run the second script manually and it works as expected but cannot figure out why it will not run at startup on the admin account.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":58,"Q_Id":47704301,"Users Score":0,"Answer":"Well thanks for the tip about adding the shebang line. I now know what the issue was. I had python2.7 installed also and the scripts were trying to start with this instead of 3.6. The guest account had the files associatted correctly, that why it worked. All good now. Thanks guys.","Q_Score":0,"Tags":"python,windows,python-3.x","A_Id":47705260,"CreationDate":"2017-12-07T21:42:00.000","Title":"Running Multiple Scripts from Startup Folder on Windows 7","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to create a web application using python which has a HTML form and the form data is used as a command line input to start an application. I know how to initiate the CLI tool from web app, but want a way to get the output of the CLI tool from Linux terminal real time and show it in the web application. \nThe CLI tool will run for a day and the terminal output will change in real time. Is there a way to display the changing Linux terminal output in to the web application. Information about any web terminal or way to get and store the real-time screen output of a linux application will be helpful.\nWhen ever the screen O\/P of the application running in linux changes then the web application should also be updated with the change. \nAny python lib or tools will be useful and easy to Integrate?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":515,"Q_Id":47709408,"Users Score":0,"Answer":"A quick solution I would do (without any libraries or stuff):\n\ninvoke your CLI program and set it up to continuously output to a file on the server. Make sure you know the file name.\nuse Ajax calls to fetch the output to the client. OR (if you are in for hard stuff) use a webSocket to output to the client.","Q_Score":1,"Tags":"html,linux,python-3.x,web,terminal","A_Id":47709772,"CreationDate":"2017-12-08T07:09:00.000","Title":"Getting a Linux terminal output of a CLI tool and displaying in Web page","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I'm currently working on a project, which will dynamically fetch some informations of my job and display them in a html page. To accomplish this i wrote a python script, which will be invoked using a PHP webservice. The script needs to edit some files in order to work.\nBasically PHP executes the script using \n $output = shell_exec('python script.py'); \nThe problem is, that if the webservice is called, the script does not have the needed permissions to edit the files.\nSo the webserver should call the script using something like  $output = shell_exec('sudo python script.py');  \nI may need to change the permissions to the project folder but i don't know how.\nSome additional informations:\nI'm using a raspberry pi 3 with LAMP installation on raspian as webserver\nThe folder structure is the following:\n\nprojectfolder \n| \n- style (containing css)\n-script.py\n-script2.py\n-filetoedit1.txt\n-filetoedit2.html\nAny help is appreciated!","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":25,"Q_Id":47720160,"Users Score":0,"Answer":"As suggested by @wpercy you have figure out which user is executing the file. Usually that user is called  www-data !\nTo find out which user is calling the service use\n ps aux | grep -E '[a]pache|[h]ttpd|[_]www|[w]ww-data|[n]ginx' | grep -v root | head -1 | cut -d\\  -f1  \nAfter you figured out the user you have to change the permission for the folder. That command schould be something like  chown -R www-data:www-data \/var\/www\/html\/Projectfolder \nSpecial thanks to wpercy!","Q_Score":0,"Tags":"php,python,linux,webserver,file-permissions","A_Id":47720634,"CreationDate":"2017-12-08T18:23:00.000","Title":"Linux editing privilege over webservice","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I've checked out a python project with a local environment. I am trying to add the local env in IntelliJ on the Project Structure > Platform Settings > SDKs screen, I select 'Add local' and navigate to [my_project]\/env\/bin\/python. \nI then see the message \"Invalid Python SDK - Cannot set up a python SDK at Unknown at '[my_project]\/env\/bin\/python'. The SDK seems invalid.\"\nIf I then click ok, I see the message \"Cannot Detect SDK Version - Probably SDK installed in '[my_project]\/env\/bin\/python' is corrupt\"\nIn the logs I see the messages\n\"ERROR - ns.python.sdk.PythonSdkUpdater - Failed to determine Python's sys.path value\"\nand\n\"...env\/bin\/python: cannot execute binary file\".\nAny advice would be much appreciated.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":334,"Q_Id":47740320,"Users Score":1,"Answer":"I found the answer, and including it here for completion even though it's a kind of specific case.\nI have a project shared between a docker instance and my local machine. The 'env' I was trying to use on the local machine had been created in docker, and therefore referred to an instance of python that existed on docker. \nI had to create a second environment on my machine, and now all is working well.","Q_Score":1,"Tags":"python,intellij-idea","A_Id":47830967,"CreationDate":"2017-12-10T15:27:00.000","Title":"Using local Python environment in IntelliJ","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Problem:\nI have included Python's install path (C:\\Program Files\\Python36) on both \nthe \"Path\" and \"PYTHONPATH\" system variables. I haven't needed to use Python for a while, and I am certain it worked last time (close to a few months ago). Python IDLE still works, but I need to use Python through the command prompt.\nEvery other similar question I found online was usually resolved with making the proper changes to the system variables.\nError message when attempting to execute any Python-related task:\n\npython : The term 'python' is not recognized as the name of a cmdlet, function, script file, or operable program.\nCheck the spelling of the name, or if a path was included, verify that the path is correct and try again.\nAt line:1 char:1\n+ python\n+ ~~~~~~\n    + CategoryInfo          : ObjectNotFound: (python:String) [], CommandNotFoundException\n    + FullyQualifiedErrorId : CommandNotFoundException\n\nWhat I've done so far:\n\nSet system variables to Python Path via Control Panel>System and Security>System>Advanced System Settings>Environment Variables\nTried using cd to use python directly from it's install location","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":2345,"Q_Id":47744506,"Users Score":-1,"Answer":"Solution:\nPython's install path was overridden by Visual Studio to it's \"shared\" location (more like pain-in-the-ass location) located at:\nC:\\Program Files (x86)\\Microsoft Visual Studio\\Shared\\Python36_64\\\nChanging both system variables(Path and PYTHONPATH) to this location resolved this issue.\nThank you to all who commented\/responded.\nEDIT: Apparently it is bad practice to manually set PYTHONPATH, as it is automatically set by Python.","Q_Score":0,"Tags":"python,windows,python-3.x,windows-10","A_Id":47744895,"CreationDate":"2017-12-10T23:17:00.000","Title":"Python 3.6 isn't runnable through Command Prompt","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"When I run python someCode.py in my terminal, I am actually using python 2.7\nI have installed python 3.6 on my Mac and would like to use it in terminal. how can I do that?","AnswerCount":2,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":15774,"Q_Id":47751125,"Users Score":7,"Answer":"Just type python3 where you would have typed python. \nFor example open repl type python3 run app.py program with python3.6 type python3 app.py","Q_Score":2,"Tags":"python,macos,terminal","A_Id":47751976,"CreationDate":"2017-12-11T10:43:00.000","Title":"How do I use python 3 on terminal Mac","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"When I run python someCode.py in my terminal, I am actually using python 2.7\nI have installed python 3.6 on my Mac and would like to use it in terminal. how can I do that?","AnswerCount":2,"Available Count":2,"Score":0.0996679946,"is_accepted":false,"ViewCount":15774,"Q_Id":47751125,"Users Score":1,"Answer":"type python3 on command window\/ terminal window & press enter \nfor exit from python type quit() & press enter","Q_Score":2,"Tags":"python,macos,terminal","A_Id":54866894,"CreationDate":"2017-12-11T10:43:00.000","Title":"How do I use python 3 on terminal Mac","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Is there any real documentation for the Python Azure IoTHub SDK?  I have found a few code samples but nothing comprehensive.  It's also hard to correlate with the documentation for other language SDK's as they all seem slightly different.  Even the source code is not good documentation as it's actually a wrapper over C++.\nI'd like to be able to take advantage of all the features, but I can't.  For instance in the code samples we see send_confirmation_callback, receive_message_callback, device_twin_callback, device_method_callback, and blob_upload_conf_callback, and it's not clear to me what these all do, or what other kinds of callbacks there might be.\nAm I missing it or does it not exist?","AnswerCount":2,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":271,"Q_Id":47763078,"Users Score":1,"Answer":"This is really disappointing that as of July 2019, no documentation\/API reference is available for Azure IOT suite's python SDK. What we have is a git repository with uncommented C-code or some sample programs.\nTo answer your question, No, there is no documentation as of now. I personally had to add dotnet in my stack only to get it working. Though working with python SDK would make life marginally better if there WAS a python SDK. The current one is simply a wrapper on created with BOOST. However, you can look into the API references for dotnet SDK and then moving back to the so-called Python SDK get's relatively easier. \n-Cheers (:","Q_Score":0,"Tags":"python,azure,azure-iot-hub,azure-iot-sdk","A_Id":57144824,"CreationDate":"2017-12-11T23:25:00.000","Title":"Documentation for Python Azure IoTHub SDK","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to monitor a file and if there is a change file I need to execute a script but the catch is cron job is not allowed, also this will be executed on AIX system.\nCan somebody help me here on how to proceed.Thank You","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":73,"Q_Id":47764837,"Users Score":0,"Answer":"One way I can think of is to write a daemon (another script perhaps) and keep checking the file for changes.\nIt is possible to write a script with infinite loop and the loop can contain the file check logic.","Q_Score":0,"Tags":"python,shell,cron,scheduled-tasks,aix","A_Id":47767204,"CreationDate":"2017-12-12T03:19:00.000","Title":"how to monitor changes in file without cron job in AIX","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have created a workspace and clone all files in to that. Now, I'm running my code through jenkins. Can anyone assist how to display all the files in my workspace through any command. I tried with ${workspace} dir in Jenkins but it is showing any output.\nBasically, if you are at any folder in your system and you open cmd and exceute dir in windows, it will display all the files in it. \nThe same thing I want to see in Jenkins for windows.\nThanks.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":2946,"Q_Id":47774073,"Users Score":3,"Answer":"Just dir no ${workspace}\nbat 'dir' in a pipeline script.\nSelect a \"execute batch command\" option and write the commands you want to execute in there. \nThen check the console output of the build which was successful.","Q_Score":3,"Tags":"java,python,grails,jenkins","A_Id":47774670,"CreationDate":"2017-12-12T13:39:00.000","Title":"Jenkins command to display all file in directory?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am correct in understand that if I use the default worker type (sync) then if the app blocks for any reason, say while waiting fo the result of a database query, the aaociated worker process will not be able to handle any further requests during this time?\nI am looking for a model which doesn't require too much special coding in my app code. I understand there are two async worker types, gevent and gthread, which can solve this problem. What is the difference between these two and and does my app need to be thread safe to use these?\nUPDATE - I did some reading on gevent it seems it works by monkey patching std library functions so I would think that in the case of a database query in general it probably wouldn't patch whatever db library I am using so if I would need to program my app to cooperatively yield control when I waiting on the database. Is this correct?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":874,"Q_Id":47785763,"Users Score":0,"Answer":"If you use threads, you must write your application to behave well, e.g. by always using locks to coordinate access to shared resources.\nIf you use events (e.g. gevent), then you generally don't need to worry about accessing shared resources, because your application is effectively single-threaded.\nTo answer your second question: if you use a pure python library to access your database, then gevent's monkey patching should successfully render that library nonblocking, which is what you want. But if you use a C library wrapped in Python, then monkey patching is of no use and your application will block when accessing the database.","Q_Score":0,"Tags":"python,gunicorn","A_Id":47850707,"CreationDate":"2017-12-13T04:58:00.000","Title":"If I use async workers workers with Gunicorn does my app been to be thread safe?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I want to create a Data Warehouse in Azure that contains information from several sources. The input data comes from diferent APIS, which I want to access them using python and the output should be stored into the Warehouse. This process should be updated every day.\nI have read lots of documents from Azure, but I can't understand how I need to design this process.\nThe first question is: Where should the python processes, to collect the data from the different APIs, be created? In a pipeline of the Azure Data Factory or somewhere else?\nRegards","AnswerCount":3,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":1508,"Q_Id":47795020,"Users Score":0,"Answer":"With python you can use the API to create, configure and schedule the data factory pipelines. There won't be any python code running, data factory is configured only with json files. The Python library will only help you to create these json files in a language you are familiar with, the same goes for .net, powershell and every other supported language. The end result is always a bunch of json files.\nI dont know the specifics for your case, but in general you need to create linked services, datasets (that will use those linked services), and pipelines that will be a group of logical activities (that will make use of those datasets). \nIf you are using ADFv1, you can configure the schedule within the dataset's properties and you wont need a gateway as you are not using on-premise data. If you are using ADFv2, you will need an Azure Integration Runtime (type \"managed\") and you can configure the schedule with triggers.\nI hope I was able to clarify a bit these concepts.\nCheers.","Q_Score":2,"Tags":"python,azure,azure-data-factory","A_Id":47874795,"CreationDate":"2017-12-13T14:09:00.000","Title":"Get data from API using Python and load into Azure SQL Data Warehouse using Azure Data Factory","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"In Weblogic how to find WLST python version. Its known that WLST is made up by python.\nAnd Python 2 and Python 3 is different from one another Architecture wise and bit wise. Python 2 available for 64 bit considering Windows OS. Python 3 is still 32-bit as far I know. Python is well known simplest Higher Level Language that is widely used in many Industry, but classified like version 2 and 3.\nWhen I work in WLST I wonder what would be the Python version it is made up of.\nWhen Weblogic version differs does it differ. However it so, how to find out, is there a specific command or function for it while operating in WLST shell","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":1545,"Q_Id":47797170,"Users Score":2,"Answer":"This command will print the Python version used by WLST : \n\nprint (sys.version)","Q_Score":2,"Tags":"python,wlst","A_Id":47809130,"CreationDate":"2017-12-13T15:50:00.000","Title":"How to find WLST python version","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am using distributed Tensorflow on aws using gpus. When I train the model on my local machine, I indicate ps_host\/workers_host as something like 'localhost:2225'.  What are the ps\/workers host I need to use in case of aws?","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":186,"Q_Id":47804792,"Users Score":0,"Answer":"When a distributed TF code is run on the cluster, other nodes could be accessed through \"private ip: port number\". \nBut the problem with AWS is that the other nodes can not be easily launched and it needs extra configuration.","Q_Score":4,"Tags":"python,tensorflow,tensorflow-gpu","A_Id":54758338,"CreationDate":"2017-12-14T01:56:00.000","Title":"Distributed Tensorflow: ps\/workers hosts on aws ?","Data Science and Machine Learning":1,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm following a course on Udemy: Automate the Boring Stuff using Python. For one of the courses the guide asks me to install Pyperclip. Now I've tried this, but cmd keeps returning:  \" 'pip' is not recognized as an internal or external command, operable or batch file\nThe path I use is \"C:\\Users\\myname\\AppData\\Local\\Programs\\Python\\Python36-32\\Scripts\\pip.exe\", I've tried it without the pip.exe, but then it also returns an error.","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":169,"Q_Id":47812002,"Users Score":0,"Answer":"Fixed it, I tried out \"C:\\Users\\Scott\\AppData\\Local\\Programs\\Python\\Python36-32\\Scripts\\pip.exe install pyperclip\", and it worked.","Q_Score":0,"Tags":"python,pyperclip","A_Id":47812094,"CreationDate":"2017-12-14T11:16:00.000","Title":"PYTHON - pyperclip installing issue","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a python project working fine in Aptana.\nI then started to use pipenv for the project's environment management and now I can't get Aptana to use that environment.\nI also set up a new project then added it to Aptana and Aptana uses a 3.7 version of python instead of the pipenv python 2.7.\nAny suggestions on where to start looking?","AnswerCount":1,"Available Count":1,"Score":0.761594156,"is_accepted":false,"ViewCount":1372,"Q_Id":47827106,"Users Score":5,"Answer":"Pipenv and python folders\nGet the location where pipenv is storing the virtual environment with:\npipenv --venv\nIt will return a folder: [environment_folder]\nAlso, get at hand the location of the original python executable, the one used by pipenv: [python_folder]\nEclipse configuration\nGo to the existing project where you want to use pipenv or create a new python project.\nGo to Eclipse menu: Project > Properties\nChoose: PyDev - Interpreter\nClick:  \"Click here to configure an interpreter not listed\"\nChoose \"New\" from python interpreter\nUse the environment_folder output of pipenv --venv\nSet Interpreter Executable to: [environment_folder]\\Scripts\\python.exe\nWhen propmted, select folders to add to system PYTHONPATH:\n\n[python_folder]\\Lib\n[python_folder]\\DLLs\n[environment_folder]\\\n[environment_folder]\\lib [environment_folder]\\Scripts\n[environment_folder]\\lib\\site-packages\n\nAdd those folders.\nAccept and apply.\nAnd everything should be ready.","Q_Score":5,"Tags":"python,aptana,aptana3,pipenv","A_Id":53565839,"CreationDate":"2017-12-15T06:41:00.000","Title":"How do I configure Aptana IDE (Eclipse) to work with pipenv?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I built a simple python script as an exe file - first build didn't display expected results so I rebuilt it with changes, exe works fine now however the exe file is still displaying is original build date.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":73,"Q_Id":47835322,"Users Score":0,"Answer":"cx_Freeze calls shutil.copystat() on all files that it copies, so the source time is used on the target file as well.","Q_Score":0,"Tags":"python,exe,cx-freeze","A_Id":47848710,"CreationDate":"2017-12-15T15:26:00.000","Title":"Date modified of an executable displays the first build date when building with cxfreeze. However the executable runs the most recent version","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I ty to get a stacktrace from the running python process, using gdb. The python is running in an virtualenv managed by pyenv, on Ubuntu 16.4.\nI tried this:\nsudo gdb ~\/.pyenv\/versions\/bla\/bin\/python -p <PID>\nThen I do not have the extensions available, so I do\nsymbol-file \/usr\/bin\/python3.5-dbg\nThen when I run py-list, I get the following error:\nUnable to locate gdb frame for python bytecode interpreter.\nAlso tried:\nsudo gdb \/usr\/bin\/python3.5-dbg -p <PID> and same error.\nAny other way? Or an easier approach?","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":3323,"Q_Id":47837591,"Users Score":1,"Answer":"Probably your python version in the virtual env is incompatible with the python dbg package, which is compatible with the python at \/usr\/bin\/. I've solved this problem by copying the python at \/usr\/bin to the virtual env and re-running. Even if both pythons are the same version the build date seems to make a big difference for gdb debugging.","Q_Score":3,"Tags":"python,linux,gdb,pyenv","A_Id":58419198,"CreationDate":"2017-12-15T17:59:00.000","Title":"Unable to locate gdb frame for python bytecode interpreter","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Have installed GNS3 on my Linux (Debian Strech) and getting below error message, please help, installed from package, OS updated. qt and sip at their newest version on my machine (installed).\nFail update installation: No module named 'sip' **\n**Can't import Qt modules: Qt and\/or PyQt is probably not installed correctly...\nAny help\/direction to solve the problem will be highly appreciated.\nThanks in-advance.","AnswerCount":5,"Available Count":2,"Score":0.0399786803,"is_accepted":false,"ViewCount":3641,"Q_Id":47852254,"Users Score":1,"Answer":"I got this after upgrading Ubuntu to 20.04.  Only thing that worked was backing up my GNS3 folder with my project files, uninstalling gns3-server and gns3-gui, then re-installing.  Everything works now.","Q_Score":1,"Tags":"qt,pyqt,debian,python-sip","A_Id":61470215,"CreationDate":"2017-12-17T04:45:00.000","Title":"GNS3 sip\/qt error","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Have installed GNS3 on my Linux (Debian Strech) and getting below error message, please help, installed from package, OS updated. qt and sip at their newest version on my machine (installed).\nFail update installation: No module named 'sip' **\n**Can't import Qt modules: Qt and\/or PyQt is probably not installed correctly...\nAny help\/direction to solve the problem will be highly appreciated.\nThanks in-advance.","AnswerCount":5,"Available Count":2,"Score":0.0399786803,"is_accepted":false,"ViewCount":3641,"Q_Id":47852254,"Users Score":1,"Answer":"i found out that the problem was a source in source.list.\nin my case was the firefox quantum","Q_Score":1,"Tags":"qt,pyqt,debian,python-sip","A_Id":48118242,"CreationDate":"2017-12-17T04:45:00.000","Title":"GNS3 sip\/qt error","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"What are the different modules\/ways to copy file from a windows computer to a linux server available in python\nI tried using ftplib api to connect to the windows server but i m unable to do with the error - socket.error: [Errno 111] Connection refused\nWhat are the other modules that i can connect to a windows computer to copy or list the files under a directory","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":2296,"Q_Id":47866365,"Users Score":0,"Answer":"If you have access to linux server, and the file generated on windows automatically, you can do the folowing:\n\nGenerate ssh-key on your windows maching\nAdd it to authorized_hosts of the linux machine\nInstall simple console scp tool on windows\nWrite simple cmd-script to copy file with help of scp, something like:\nscp c:\\path\\to\\file.txt user@linuxhost.local:\/home\/user\/file.txt\nRun this script automatically every time, then the file is generated on windows host.","Q_Score":0,"Tags":"python,ftplib","A_Id":47869378,"CreationDate":"2017-12-18T10:23:00.000","Title":"Copy File from Windows Host to Linux [Python]","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I had to install the 64-bit version of Anaconda with python 3.5 in Windows 10. I followed the default settings (AppData\/Continuum\/Anaconda3). However, after installation, I am unsure how to access the Anaconda command prompt so that I can use conda to install packages. I also attempted to install Anaconda 64 bit in C:\/Program Files, but several of the python script did not like the space and it failed to install.\nWhat can I do to access the Anaconda prompt?","AnswerCount":6,"Available Count":4,"Score":1.0,"is_accepted":false,"ViewCount":214781,"Q_Id":47914980,"Users Score":10,"Answer":"I added \"\\Anaconda3_64\\\" and \"\\Anaconda3_64\\Scripts\\\" to the PATH variable. Then I can use conda from powershell or command prompt.","Q_Score":49,"Tags":"python,anaconda","A_Id":53872163,"CreationDate":"2017-12-20T22:01:00.000","Title":"How to access Anaconda command prompt in Windows 10 (64-bit)","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I had to install the 64-bit version of Anaconda with python 3.5 in Windows 10. I followed the default settings (AppData\/Continuum\/Anaconda3). However, after installation, I am unsure how to access the Anaconda command prompt so that I can use conda to install packages. I also attempted to install Anaconda 64 bit in C:\/Program Files, but several of the python script did not like the space and it failed to install.\nWhat can I do to access the Anaconda prompt?","AnswerCount":6,"Available Count":4,"Score":1.0,"is_accepted":false,"ViewCount":214781,"Q_Id":47914980,"Users Score":46,"Answer":"Go with the mouse to the Windows Icon (lower left) and start typing \"Anaconda\". There should show up some matching entries. Select \"Anaconda Prompt\". A new command window, named \"Anaconda Prompt\" will open. Now, you can work from there with Python, conda and other tools.","Q_Score":49,"Tags":"python,anaconda","A_Id":47915189,"CreationDate":"2017-12-20T22:01:00.000","Title":"How to access Anaconda command prompt in Windows 10 (64-bit)","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I had to install the 64-bit version of Anaconda with python 3.5 in Windows 10. I followed the default settings (AppData\/Continuum\/Anaconda3). However, after installation, I am unsure how to access the Anaconda command prompt so that I can use conda to install packages. I also attempted to install Anaconda 64 bit in C:\/Program Files, but several of the python script did not like the space and it failed to install.\nWhat can I do to access the Anaconda prompt?","AnswerCount":6,"Available Count":4,"Score":0.1325487884,"is_accepted":false,"ViewCount":214781,"Q_Id":47914980,"Users Score":4,"Answer":"If Anaconda Prompt is missing, you can create it by creating a shortcut file of Command Prompt (cmd.exe) and change its target to:\n%windir%\\System32\\cmd.exe \"\/K\" <Anaconda Location>\\anaconda3\\Scripts\\activate.bat\nExample:\n%windir%\\system32\\cmd.exe \"\/K\" C:\\Users\\user_1\\AppData\\Local\\Continuum\\anaconda3\\Scripts\\activate.bat","Q_Score":49,"Tags":"python,anaconda","A_Id":56891764,"CreationDate":"2017-12-20T22:01:00.000","Title":"How to access Anaconda command prompt in Windows 10 (64-bit)","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I had to install the 64-bit version of Anaconda with python 3.5 in Windows 10. I followed the default settings (AppData\/Continuum\/Anaconda3). However, after installation, I am unsure how to access the Anaconda command prompt so that I can use conda to install packages. I also attempted to install Anaconda 64 bit in C:\/Program Files, but several of the python script did not like the space and it failed to install.\nWhat can I do to access the Anaconda prompt?","AnswerCount":6,"Available Count":4,"Score":1.0,"is_accepted":false,"ViewCount":214781,"Q_Id":47914980,"Users Score":16,"Answer":"To run Anaconda Prompt using an icon, I made an icon and put:\n%windir%\\System32\\cmd.exe \"\/K\" C:\\ProgramData\\Anaconda3\\Scripts\\activate.bat C:\\ProgramData\\Anaconda3 (The file location would be different in each computer.)\nat icon -> right click -> Property -> Shortcut -> Target\nI see %HOMEPATH% at icon -> right click -> Property -> Start in\nTest environment\n\u00a0\u00a0 OS: Windows 10\n\u00a0\u00a0 Library: Anaconda 10 (64 bit)","Q_Score":49,"Tags":"python,anaconda","A_Id":55545141,"CreationDate":"2017-12-20T22:01:00.000","Title":"How to access Anaconda command prompt in Windows 10 (64-bit)","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Install bitvise(ssh server services) in windows7, but i use python paramiko remote  call program, are executed in the backend. i want it executed in front end. how to solve this problem?","AnswerCount":2,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":438,"Q_Id":47952552,"Users Score":1,"Answer":"Normally the (SSH) servers run as a Windows service.\nWindow services run in a separate Windows session (google for \"Session 0 isolation\"). They cannot access interactive (user) Windows sessions.\nAlso note that there can be multiple user sessions (multiple logged in users) in Windows. How would the SSH server know, what user session to display the GUI on (even if it could)?\n\nYou can run the SSH server in an interactive Windows session, instead as a service. It has its limitations though.\n\nIn general, all this (running GUI application on Windows remotely through SSH) does not look like a good idea to me.","Q_Score":1,"Tags":"python,windows,ssh,paramiko","A_Id":47953486,"CreationDate":"2017-12-23T12:36:00.000","Title":"How to configure Bitvise SSH Server\uff0cmake the process run in the front end","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"More details:\nMacbook Air 10.12.6 (16G1036);\nPython version: python3.6\nIDE: Pycharm 2017.3.1\nError:\nUsers\/lrh\/PycharmProjects\/TensorFlowDemo\/venv\/bin\/python \/Applications\/PyCharm.app\/Contents\/helpers\/pydev\/pydev_run_in_console.py 51562 51563 \/Users\/lrh\/PycharmProjects\/TensorFlowDemo\/demo1.py\nError starting server with host: \"localhost\", port: \"51562\", client_port: \"51563\"\nTraceback (most recent call last):\n  File \"\/Applications\/PyCharm.app\/Contents\/helpers\/pydev\/pydevconsole.py\", line 270, in start_console_server\n    server = XMLRPCServer((host, port), logRequests=False, allow_none=True)\n  File \"\/Users\/lrh\/anaconda3\/lib\/python3.6\/xmlrpc\/server.py\", line 598, in init\n    socketserver.TCPServer.init(self, addr, requestHandler, bind_and_activate)\n  File \"\/Users\/lrh\/anaconda3\/lib\/python3.6\/socketserver.py\", line 453, in init\n    self.server_bind()\n  File \"\/Users\/lrh\/anaconda3\/lib\/python3.6\/socketserver.py\", line 467, in server_bind\n    self.socket.bind(self.server_address)\nOSError: [Errno 49] Can't assign requested address\nConsole server didn't start\nhow can i fix it?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":675,"Q_Id":47966943,"Users Score":0,"Answer":"Because the console uses the port 51562 and 51563. So you might didnt exit a program correctly to cause the ports are still using.","Q_Score":0,"Tags":"python,console,pycharm","A_Id":47967440,"CreationDate":"2017-12-25T08:22:00.000","Title":"When I use pycharm to run code, the error \"OSError: [Errno 49] Can't assign requested address\" happended.","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I know that you can do \"chmod +x filename.py\" to make the file executable on mac but is there a way I can change some setting so that happens by default when I create a filename with .py extension?","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":299,"Q_Id":47973401,"Users Score":0,"Answer":"using Automator, create an application that runs a shell script that runs python, and set the default application for opening .py files.","Q_Score":0,"Tags":"python,macos","A_Id":47973439,"CreationDate":"2017-12-26T02:33:00.000","Title":"How do I make .py files executable by default on mac OS?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I tried to connect to my windows 7 machine using Ansible using credssp I'm recieving the error as below.\ntls_server_hello,wrong_ssl_version.\nWhereas when I tried the same in my windows 10 machine I'm able to do win_ping","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":3609,"Q_Id":47993255,"Users Score":0,"Answer":"I too had this issue and ended up here.\nGoogling lead me to believe that this might be because third party root certificates on the windows host might have somehow been borked. Was it a bad update? Was it a dangerous user? Who knows! Who cares!\nI did the following, and it resolved my connection issues:\n1) Delete HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\SystemCertificates\\AuthRoot\\Certificates \n2) Reboot\nNo more SSL wrong version error","Q_Score":0,"Tags":"python,https,ansible,winrm","A_Id":48159688,"CreationDate":"2017-12-27T13:42:00.000","Title":"Ansible HTTPS connection wrong SSL version","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a game (.exe using python) that prints some console logs and I want to see these WHILE the game is running.\nI have already seen solutions like:\ncmd \/k start.exe\nbut that only shows the console AFTER the game has stopped. I want it to be shown WHILE the game is running. Is this possible? Or is there some sort of python command I can run to open a console terminal during game?\nedit\nI'm using the blender game engine to create a .exe which is executing python script. Solutions I have come across temporarily close the terminal window until the .exe game is closed. I would like it to stay open while the game plays.","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":425,"Q_Id":47997038,"Users Score":0,"Answer":"click start\nin the run box type \"cmd.exe\"\nin the terminal type \"cd \/path\/to\/my\/prog\"\nthen type \"my_prog.exe\" \noutput should be printing to the console ....\nit should be noted you have not really supplied enough information to actually answer this question, but i think this should work as long as the exe is printing to stdout","Q_Score":0,"Tags":"python,windows,cmd","A_Id":47997108,"CreationDate":"2017-12-27T18:33:00.000","Title":"how to keep cmd line open to show console logs WHILE blender game engine runs","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Is there a python3 equivalent to to the bash command set -e? That is, to stop execution as soon as an error occurs? Or does python already do this?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":97,"Q_Id":48000154,"Users Score":3,"Answer":"Python will always stop execution when an uncaught exception occurs.\nIt will print the traceback with information about the exception.","Q_Score":0,"Tags":"python,bash,python-3.x,exception","A_Id":48000173,"CreationDate":"2017-12-28T00:22:00.000","Title":"Is there a python3 equivalent to the bash command `set -e`?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have installed the google assistant SDK on a raspberry pi 3 and have so far managed to get Spotify working, and managed to get IFTTT to run for lights. What I really want to know is whether it is possible to have google assistant run and interact with python scripts on the pi. By which I mean I have a script called sound_the_alarm.py which pulls news from different sources, gives updates on bitcoin etc, and then plays a random song from my library, and turns on a light via gpio. I would like to be able to say \u201cok google sound the alarm at 7:00 tomorrow and have it update the crib tab with an instance of the alarm. Is this possible? I have found nothing online suggesting so! \nThanks\nWill","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":1796,"Q_Id":48000835,"Users Score":0,"Answer":"It is possible, but not directly, as I know.\nI use IFTTT for that (check on youtube how easy it is).\nThe easiest way is to have public IP with your raspberry, but it is dangerous (see below for solution).\n\nLog into ifttt.com and make an applet: Google Assistant Command to Webhook. It is a piece of cake. You will learn it in minutes (use youtube for tutorial).\nYou type as a webhook public IP of your raspberry with a link to PHP app.\nYour PHP app fetches the info about command from Google Assistant and exec(\"Your command here\");\n\nAdditional info:\n\nIt is probably possible to make fetching app in Python instead of PHP, but I am not a Python programmer, so I cannot help with it. I use PHP for that.\nIt is MUUUCH SAFER to make additional \"Gate Server\". Take the cheapest hosting provider. Make an APP on this server (probably in PHP :P). Your IFTTT sends a request to the Gate (instead of raspberry directly). And your raspberry pi contacts the gate checking if there are no any orders for it. If there is any, it follows the order. Because of that nobody knows your raspberry IP address. You can hide it behind the router so it is more less safe.\n\nI hope my solution is understandable :).\nK.","Q_Score":2,"Tags":"python,cron,raspberry-pi3,google-assistant-sdk","A_Id":50710220,"CreationDate":"2017-12-28T02:12:00.000","Title":"Google assistant to run python script","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm trying to install the os python module on Windows.\nIn a cmd console, I typed:\nC:\\Users\\username> pip install os\nCollecting os\n  Could not find a version that satisfies the requirement os (from versions: )\nNo matching distribution found for os\n\nSo I guessed the module was not available on Windows for some reasons, but I found references of it in some SO questions.\nObviously, typing Windows and os in Google only gives me answers about Windows itself.\nSo, how can I install the os module on Windows ?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":79293,"Q_Id":48010748,"Users Score":22,"Answer":"OS is python's standard library. So no need to download it.","Q_Score":6,"Tags":"python","A_Id":48010814,"CreationDate":"2017-12-28T16:13:00.000","Title":"How to install the os module on Windows?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Can somebody simply explain to me what is the correct workflow to download a GitHub code and work on it, quickly try tweaks and fixes ?\nSolution 1\n\ninstall the GitHub repo using pip\nthen python \"functions\" are called using shell commands, not in Python shell, but in the macOS shell. \n\nThis is clearly not the good solution as I don't even know where is the source code. And not use the macOS shell. I want to see all the files, copy\/paste, correct and try things.\nSolution 2\n\nDownload the GitHub repo in a working directory.\nOpen a macOS shell. \ncd in the directory.\nUpdate PYTHONPATH to the current directory.\nStart the python shell.\nLoad the desired script to try using the import directive.\nEdit the script using a text editor and repeat action 6 to try things.\n\nIt feels weird to update PYTHONPATH each time I want to work on it. But the weirder is that because the initial script is done to be used in the macOS shell, I cannot pass argument to the main() function when calling it through the Python shell. \nAm I missing something here ? Is it normal that python repos look like released code that can hardly be tweaked and quickly tested ?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":46,"Q_Id":48011531,"Users Score":2,"Answer":"None of those solutions are the right way to do it. When you need to patch a python code, because you want to add a feature or fix a bug, you should proceed as follows:\nSolution 3\n\nFind the project's main page (on github, gitlab or anywhere else), usually a lookup DDG or google or --help will point you the right direction.\nRead the project's README file, and look for a developers section\nCheckout the project issue tracker for feature requests and bug reports to be sure to check what you'll do isn't being worked on by someone else (and then you can offer your help), that's important for collaboration\nFor building and developing, follow instructions from the README, which usually look like the following, or just follow this:\n\nHow to work on a python project\n\ncopy the repository URL (https:\/\/github.com\/<user>\/<project>)\nopen a terminal in a directory where you want to keep your on-going work (I like to use ~\/Workspace)\nrun git clone https:\/\/github.com\/<user>\/<project>\ncd <project>\nvirtualenv var (you can use whatever name you want, but my preference goes for var)\nvar\/bin\/pip install -r requirements.txt\nrun var\/bin\/python and all the modules you're developing are available in the python REPL.\n\nThis should apply to the vast majority of python projects. Some projects will show you other tools like virtualenv for that step (hint: if there's a requirements.txt you know it's what you'll do), or will use zc.buildout or will use pipenv, but those will usually tell how to build in the README.\nYour questions\n\nIt feels weird to update PYTHONPATH each time I want to work on it. But the weirder is that because the initial script is done to be used in the macOS shell, I cannot pass argument to the main() function when calling it through the Python shell.\n\nyou're right to feel weird doing that. Tools like virtualenv or buildout are there to create contained environments for you to develop comfortably. You'll even find the script you usually find in your path available in the env's bin directory. You'll also find the test suite so that you can test your changes against regressions!\n\nIs it normal that python repos look like released code that can hardly be tweaked and quickly tested ?\n\nusually development happens in a specific branch on a project. So on the github page, you might see the stable\/release branch, whereas all the new stuff happens in the devel branch. always look at the issues, and first communicate with the project's maintainer before doing code, at risk of having your contribution rejected.","Q_Score":0,"Tags":"python,git,shell,github","A_Id":48011670,"CreationDate":"2017-12-28T17:10:00.000","Title":"How quickly set up a python environment to work and tweak a GitHub downloaded repo?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"how to keep the command to run if the process is auto-killed\nexample:\npython3 \"command\"\nthen,\ncommand running\nif,\nKilled (process killed or stop)\nthen,\nrun the early command","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":305,"Q_Id":48028570,"Users Score":0,"Answer":"If you want to say is: 'The process running in the terminal stopped, you want to run once in the second'.\nThen: 1, you can find it by the up arrow in the cursor keys of your keyboard;\nYou can type 'sudo gedit ~\/.bash_history' or 'history | less' in the terminal to see the history commands you entered.\nIf you want to say is: 'Your process may be stopped for some reason, but you want it to start running again'\nYou can try this: 1, create a script to run your process;\n2, in your code to find the reasons that may cause your program to stop, and then use the conditional statement to judge, once your code stops calling the script created above.","Q_Score":0,"Tags":"python,ubuntu","A_Id":48030928,"CreationDate":"2017-12-29T21:19:00.000","Title":"How to run a command if the process is Killed","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am submitting a python script to condor. When condor runs it it gets\nan import error. Condor runs it as\n\/var\/lib\/condor\/execute\/dir_170475\/condor_exec.exe. If I manually copy\nthe python script to the execute machine and put it in the same place\nand run it, it does not get an import error. I am wondering how to\ndebug this.\nHow can I see the command line condor uses to run it? Can the file\ncopied to \/var\/lib\/condor\/execute\/dir_170475\/condor_exec.exe be\nretained after the failure so I can see it? Any other suggestions on\nhow to debug this?","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":289,"Q_Id":48031855,"Users Score":1,"Answer":"You can simply run an interactive job (basically just a job with sleep or cat as command) and do ssh_to_job to run it.\nGenerally you need to set-up your python environment on the compute node, it is best to have a venv and activate it inside your start script.","Q_Score":1,"Tags":"python,condor","A_Id":61310906,"CreationDate":"2017-12-30T07:18:00.000","Title":"Debugging htcondor issue running python script","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I want to build an existing Python web application in jenkins, just like building a java application using Maven.\nIs it possible or not? if possible, please help me with necessary configurations to build and Continuous Deployment of the same application.","AnswerCount":1,"Available Count":1,"Score":0.3799489623,"is_accepted":false,"ViewCount":1298,"Q_Id":48032756,"Users Score":2,"Answer":"Options 1) without using docker\n\nChoose Free Style project when create jenkins job\nConfigure the Source code management section to tell jenkins where to fetch the source code, \nWrite the build commands you used by manual in build section.  \nIf your jenkins slave not installed Python and jenkins server not support to install Python on jenkins slave, you need to write commands in 'build' section to install Python,pip needed for build on jenkins slave.\n\nOption 2) using docker\n\nBuild a docker image with all requried soft and tool installed and configured to supply a build enviroment  \n(You can search there is exist docker image can meet your requirement on docker image hub before build image yourself? )\nUpload the image to docker image hub\nInstall docker engine on jenkins slave\nCreate Free style project\nCongiure Source Code Management section\nWrite docker command in  Build section to pull docker image and start a docker container, execute build command inside container","Q_Score":3,"Tags":"python,jenkins,build,continuous-deployment","A_Id":48034085,"CreationDate":"2017-12-30T09:48:00.000","Title":"Building a Python Web application in jenkins","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I have read a bunch of posts here and on Google, but my question is far more basic than the answers: If Python(2.7) came pre-installed on my MacBook Pro (High Sierra), can I just do sudo easy_install pip (as suggested) from the command line--withOUT causing issues? I have a vague understanding of global\/local installations, and my understanding is certain Python installations aren't compatible with local\/global kernel installations. I hope I am getting the terminology right, but I saw several warnings about installing pip for \"a homebrew based python installation\", but I am not sure whether Python on my laptop is installed via homebrew (nor how to find out).\nMy question came about because I wanted to install the Hydrogen package to use in Atom, the text editor (to help me learn Python). I finally succeeded in installing Hydrogen, but got stumped by the missing kernels (not sure which ones I need, so I am willing to install them all). But I can't seem to install the kernels without pip. So here I am. \nMy apologies for asking such a basic question--and thanks!","AnswerCount":3,"Available Count":1,"Score":0.0665680765,"is_accepted":false,"ViewCount":442,"Q_Id":48040573,"Users Score":1,"Answer":"Well although I am no Mac expert I've given it a shot anyway:\nYes you could but do you really want to risk it (or even do it)?  \nMac-OS must rely on Python to fulfill something in the OS otherwise it would not come inbuilt. This means two things:\nThe Python installation will be minimal.  By that I mean it will have things missing (any large library for a start).  They will do this mainly to cut down on the OS size.  Therefore you will not have the full Python library and in the long term you may end up missing out.\nSecond if anything went wrong (IE you broke your installation or even modified it -yep I've done this in Linux and have ended up factory resetting) then you may cause something to stop working and may need to factory reset or perform some other drastic action on your OS.  A separate installation would prevent your from risking this.  This is very useful because there comes a time when you may decide to update certain modules with pip and find it can't or it updates something that you shouldn't be messing with.\nYes it's possible you may run into compatibility problems but I think it's most widely accepted that you do not use the inbuilt one as it needs to remain unchanged if the OS is to use it correctly.  Messing with it increases the chances of it breaking.\nConclusion:  So even though installing modules with pip (and getting pip) can be done with the inbuilt Python it comes down whether you want to risk harming your OS.  I strongly suggest you get a separate installation and leave the inbuilt one as it is.  Second as you mentioned you will find that the inbuilt versions are never up-to-date or are built were they are not really compatible with standard libraries (expect things like the missing runtime libraries all the time) , just another reason to stay clear of them.","Q_Score":1,"Tags":"python,macos,pip,kernel,atom-editor","A_Id":48050542,"CreationDate":"2017-12-31T06:45:00.000","Title":"How to install pip for a total newbie","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"and thank you for your answer in advance. I am making a python program to automate something for my friend, and converted it into a .exe file with cx_Freeze so I could give it to him. But I have a x64 machine and he has a x86 machine. Can anyone please tell me how to make a x86 .exe file on my PC. I'm using Win 10 x64 and Python 3.6","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":181,"Q_Id":48041979,"Users Score":0,"Answer":"The .exe output actually depends on the installation you are using (I'm assuming x64) so if you used an x86bit or x32bit Python installation it will output the bit version your installation is (I know both will run on x64 computers) and just freeze in the normal way.  \nBear in mind that x32 works on x86, x64 as well so you might do best with that bit version.","Q_Score":0,"Tags":"windows,python-3.x,cx-freeze","A_Id":48140125,"CreationDate":"2017-12-31T11:13:00.000","Title":"Making a x86 .exe on a x64 machine","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I've created a simple script that executes a \"moving mouse and keyboard\" sequence. Although currently to get this to work I use a Shell (Idle) to run and that is to slow with boot up time and such.\nIs there a way to have this python file on desktop och with a hotkey swiftly run the code? I tried doing it through terminal but it doesn't like my module.\nSome info:\nThis is for both mac and windows.\nThe module I imported is pyautogui from PyPi and it works in the shell.\nThank you in advance!","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":5035,"Q_Id":48042158,"Users Score":0,"Answer":"Some things to consider when trying to setup a hotkey to successfully execute any kind of command:\nEach Operating System has its own ways to setup hotkeys and sometimes this may differ between distributions as well as between desktop managers. \nMany of the relevant how-to-descriptions are easily found via regular search machines as Google. \nIf you would in fact like your script to set-up its own hotkeys you would have to re-write it in such a manner that it can detect the current operating system\/distribution\/desktop manager by itself and execute the commands relevant to that particular set-up.","Q_Score":2,"Tags":"python,hotkeys","A_Id":48042519,"CreationDate":"2017-12-31T11:44:00.000","Title":"Run Python script quickly via HotKey","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have written a websocket server in tornado and i used websocket_ping_interval=60 to detect which connection is really closed after 60 sec. but after 60 sec the server disconnects the link(even if it's been disconnected). i think this is done because the server sends a ping packet each 60sec and the client doesn't response to the server. i want the client side(which is written in websocket python module) to response the server whenever the server sends ping req.\nI have the same problem with client websocket in browsers. any idea how to solve it?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":720,"Q_Id":48062744,"Users Score":1,"Answer":"Tornado's websocket implementation handles pings automatically (and so do most other implementations). You shouldn't have to do anything.\nTornado's ping timeout defaults to 3 times the ping interval, so if you're getting cut off after 60 seconds instead of 180 seconds, something else is doing it. Some proxies have a 60-second timeout for idle connections, so if you're going through one of those you may need a shorter ping interval. \nIf that's not it, you'll need to provide more details, ideally a reproducible test setup with client and server code.","Q_Score":1,"Tags":"python,websocket,tornado","A_Id":48070341,"CreationDate":"2018-01-02T14:28:00.000","Title":"how to response to the server ping in tornado websocket","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"When I use the Script package for Atom to run code in python3, or any package to run code for that matter, I get an error message that says:\n'python3' is not recognized as an internal or external command,\noperable program or batch file.\nI've changed the python.coffee file from python to python3 and neither have worked.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":511,"Q_Id":48072932,"Users Score":0,"Answer":"To enable Atom to run python 3, using the script plugin, make the first line of your script be the path to your python3 interpreter. I can use script to run either python 2.7.13 or python 3.6 by changing first line of my script #!path-to-python2 to #!path-to-python3.  I just checked this and it worked as described.","Q_Score":0,"Tags":"python,python-3.x,atom-editor","A_Id":48120307,"CreationDate":"2018-01-03T07:24:00.000","Title":"Difficulties with python3 and Atom","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I need to install openpyxl 2.5 on a new server.  When I run \"pip3 install openpyxl\" it installs 2.4.9.  There are features in 2.5 that are required for what I'm working on.  \nI have been able to get 2.5 on my Mac because I can download the source and simply copy\/paste it where it needs to go.  However, I'm just not experienced enough in python or linux command line to use an alternate route of my own making to get 2.5 installed on a server.\nCan someone give me a \"recipe\" or an alternative to pip3 that will install version 2.5?","AnswerCount":2,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":1554,"Q_Id":48081209,"Users Score":1,"Answer":"If you read the help for pip, you'll see that there is an option for installing pre-release versions: `pip install --pre openpyxl'","Q_Score":2,"Tags":"python,linux,openpyxl","A_Id":48085163,"CreationDate":"2018-01-03T16:20:00.000","Title":"Installing openpyxl 2.5","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm working on a windows 7 and using Cygwin for unix-like functionality. I can write and run Python scripts fine from the Cygwin console, and the installation of Python packages using pip installis successful and the installed package appears under pip list. However, if I try to run a script that imports these packages, for example the 'aloe' package, I get the error \"no such module named 'aloe'\". \nI have discovered that the packages are being installed to c:\\python27\\lib\\site-packages, i.e. the computer's general list of python packages, and not to \/usr\/lib\/python3.6\/site-packages, i.e. the list of python packages available within Cygwin. I don't know how to rectify this though. If I try to specify the install location using easy_install-3.6 aloe I get the error\n\n[Errno 13] Permission denied: '\/usr\/lib\/python3.6\/site-packages\/test-easy-install-7592.write-test'.\n\nIn desperation also tried directly copying the 'aloe' directory to the Cygwin Python packages directory using cmd with cp -r \\python27\\lib\\site-packages\\aloe \\cygwin\\lib\\python3.6\\site-packages and the move was successful, but the problem persists and when I check in the Cygwin console using ls \/usr\/lib\/python3.6\/site-packages I can't see 'aloe'.\nI have admin rights to the computer in general (sudo is not available in Cygwin anyway) so really can't figure out what the problem is. Any help would be greatly appreciated.\nThanks.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":3417,"Q_Id":48093726,"Users Score":1,"Answer":"just make sure you are in admin mode.\ni.e. right click on Cygwin, select running as administrator.\nthen install your package specifically using pip3, for python3.\ni.e. pip3 install your_package\nwith updated version, do pip3 install --upgrade your_package","Q_Score":1,"Tags":"python,cygwin","A_Id":48096083,"CreationDate":"2018-01-04T10:55:00.000","Title":"permission denied when installing python packages through cygwin","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Here I am trying to import 'libEpsonFiscalDriver.so' file in raspberry pi using python 2.7. Here are my steps in python\n\n>>>import ctypes\n>>>ctypes.cdll.LoadLibrary('\/home\/pi\/odoo\/my_module\/escpos\/lib\/libEpsonFiscalDriver.so')\n\n\n    Traceback (most recent call last):\n      File \"\", line 1, in \n      File \"\/usr\/lib\/python2.7\/ctypes\/__init__.py\", line 443, in LoadLibrary\n        return self._dlltype(name)\n      File \"\/usr\/lib\/python2.7\/ctypes\/__init__.py\", line 365, in __init__\n        self._handle = _dlopen(self._name, mode)\n    OSError: \/home\/pi\/odoo\/my_module\/escpos\/lib\/libEpsonFiscalDriver.so: cannot open shared object file: No such file or directory\n\nSo here I am getting this error.\nExtra Information: Header Information of libEpsonFiscalDriver.so file.\nreadelf -h libEpsonFiscalDriver.so\n\nELF Header:\n  Magic:   7f 45 4c 46 01 01 01 00 00 00 00 00 00 00 00 00 \n  Class:                             ELF32\n  Data:                              2's complement, little endian\n  Version:                           1 (current)\n  OS\/ABI:                            UNIX - System V\n  ABI Version:                       0\n  Type:                              DYN (Shared object file)\n  Machine:                           Intel 80386\n  Version:                           0x1\n  Entry point address:               0x5de0\n  Start of program headers:          52 (bytes into file)\n  Start of section headers:          125176 (bytes into file)\n  Flags:                             0x0\n  Size of this header:               52 (bytes)\n  Size of program headers:           32 (bytes)\n  Number of program headers:         7\n  Size of section headers:           40 (bytes)\n  Number of section headers:         29\n  Section header string table index: 26\n\nFor more, I have tested this same code with my other system with Ubuntu installed having Intel Processor and it works fine there. As, lib header listed Machine as Intel 80386. I dought that this lib will only work with Intel Architecture. Is it the thing or am I missing something?\nAny help will be more than appreciated! Thank you.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":1606,"Q_Id":48111026,"Users Score":0,"Answer":"The lib is not compatible with Raspberry Pi as the architectures are different. You need to find an ARM based version of that driver if you want to use it on the Pi.","Q_Score":1,"Tags":"python,python-2.7,raspberry-pi","A_Id":49945959,"CreationDate":"2018-01-05T09:51:00.000","Title":"cannot open shared object file: No such file or directory in raspberry pi with python","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I want to use google appengine.api in local machine. i have installed google cloud SDK and started it ,the authentication is successful . I have executed  $dev_appserver.py app.yaml at the project path which has started a google app engine server at localhost:8000 . \nwhen i want to execute the program it gives an error message \" ImportError: No module named appengine.api \" \nI appreciate your help .","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":536,"Q_Id":48118849,"Users Score":1,"Answer":"I tried executing the project in local in pycharm, so i got the above error(google.appengine.api error). Basically it has to be executed on a server.The server can be started using your terminal.\n1) Go to the project path(root folder of all files in the project where the app.yaml file is located,eg: appengine)\n2) start the server using $ dev_appserver.py app.yaml. It starts server at localhost port 8000 as the default one.\n3) In the server start depends on the handler and its path specified (like '\/' or '\/testjob') try localhost:8000\/ or localhost:8000\/testjob\n4) All the logs written in the program will be shown in the terminal. For logs try using 'logging' module , make sure to mention the logging level else basic level logs are not shown","Q_Score":0,"Tags":"python-2.7,google-app-engine,windows-10,gcloud","A_Id":48203280,"CreationDate":"2018-01-05T17:54:00.000","Title":"ImportError: No module named appengine.api -windows 10,local env, python 2.7","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"Right now I'm running Python in Atom with Platformio as my terminal. First off, what's the keyboard shortcut to run the file? Secondly, is there a better terminal package out there? I'd like more features such as right clicking and selecting run the file or something that makes running the file easier (maybe a run button). I switch between files quite frequently so I'd like an alternative other than using the up arrow to run previous command.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":685,"Q_Id":48119447,"Users Score":0,"Answer":"I use Atom for python. The best terminal plugin I have found is Platformio. I have a plugin named script that allows me to run python scripts from the editor window. The command also has a shortcut to speed up the process. Load script and it will appear under the packages menu. It also defines the shortcut for 'run script' as the command-I keys.\nLately I've been running python script using the Hydrogen plugin. This allows in-line plotting along with running your script. Answers and plots appear in the editor pane. Its very nice if you have to plot.","Q_Score":0,"Tags":"python,atom-editor","A_Id":48119925,"CreationDate":"2018-01-05T18:38:00.000","Title":"Python- Alternative terminal in Atom text editor","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"After installing Python I have it located in two different directories. One is visible which is the installing path I chose during installation and the second one is hidden (C:Users\\username....). \nI have now problem using pandas because the program is working in the hidden directory. Is it possible to change the working directory somehow. I am using Python IDLE to run my python scripts.\nI get this message when I run my scripts with pandas: \n\nmodule 'pandas' from 'C:\\Users\\Alex\\AppData\\Local\\Programs\\Python\\Python35\\lib\\site-packages\\pandas\\__init__.py","AnswerCount":3,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":655,"Q_Id":48126563,"Users Score":3,"Answer":"Please change your Python path from the IDLE","Q_Score":1,"Tags":"python,pandas,pip","A_Id":48126571,"CreationDate":"2018-01-06T10:48:00.000","Title":"Python in two different directories( one specified and one hidden)","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm developing a CloudShell shell and would like it to run on all CloudShell version >= 8.1.\nI require both cloudshell-shell and cloudshell-shell-core packages.\nWhich version of both packages should I use?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":40,"Q_Id":48150348,"Users Score":3,"Answer":"Cloudshell-Shell-Core & Cloudshell-Core are not dependent on server version.\nThis means that you can develop your shells with the latest versions of Cloudshell-Shell-Core (and Cloudshell-Core) for all Cloudshell server versions.","Q_Score":2,"Tags":"python,continuous-integration,continuous-deployment,endevor,quali-cloudshell","A_Id":48150417,"CreationDate":"2018-01-08T12:30:00.000","Title":"which version of cloudshell-shell and cloudshell-shell-core should I use?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a byte stream, or more specifically an RTP packet. How can I change it from big endian to little endian?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":2697,"Q_Id":48157435,"Users Score":0,"Answer":"I found out a solution. Place my data into a byte array, and simply reverse it. In hexadecimal, reversing pairs will change it from big-> little, little-> big etc. Therefore reversing a byte array, where each index is two hex pairs, the same applies.\nExample, 0000 1F40 (Big endian) -> 401F 0000 (Little Endian)\nIf each each two hex numbers represent a byte, i.e 1F or 40 are equal to one byte therefore reversing a byte array is equivalent.","Q_Score":1,"Tags":"python,arrays,endianness","A_Id":48177252,"CreationDate":"2018-01-08T20:14:00.000","Title":"Changing Python byte stream from big endian to little endian","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have downloaded .whl and trying to install it. Can you tell me the possible ways of installing wheel without using pip.\nFor tar.gz files, I executed python setup.py install and it installed my package.\nHow the same can be done for wheel when there is no setup.py file in it?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":6130,"Q_Id":48163061,"Users Score":0,"Answer":".whl: A compressed file like Zip Achieve.\nHow to install?\n\nInstall Winrar or other software that can extract compressed files.\nExtract your .whl file in a safe folder.\nAdd that directory to your Path Variables.\nNow everything is done.\n\nIt's bad practice to install a .whl file. You should use PIP.\nWell, I recommend you to extract your .whl file in that folder where all Python modules are installed.","Q_Score":1,"Tags":"python,package,python-wheel","A_Id":48163292,"CreationDate":"2018-01-09T07:15:00.000","Title":"How to install python wheel without using pip?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"When attempting to do absolutely anything using pip in the terminal, I instantly receive the message \"Access is denied.\" No other messages, just \"Access is denied.\" I've tried using administrator terminal, going to different directories, but the same issue happens. I have attempted to run \"python -m pip install --upgrade pip\" from looking at a solution in a different question but it said pip is up to date and no change occurred. I can get around installing using the \"python -m pip install (something)\" command but I would like to know the cause of this issue and how to resolve it so it doesn't impede me in future when I try doing something other than installing with pip. Any ideas? Help is greatly appreciated, thank you :)\nI'm running Python 3.6 and Windows 10.\nSo sorry if this is a duplicate question, I've spent a while attempting to see if the answer is already here but for the most part they appear to all be for a different OS or have a different error. Of course, I could have been searching using the wrong query but like Jon Snow, I know nothing, especially about technical stuff.\nEDIT: I've gone into the pip.exe files locations and have adjusted security permissions so that any user on my device has full control, still no luck. Many reboots have been done but no luck there either. I can't seem to log into the admin account in terminal as it doesn't accept my password, even though I am the sole account and an admin account.","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":4171,"Q_Id":48164176,"Users Score":0,"Answer":"I had the same problem and did all the steps to fix it, eventually I found out that the antivirus program was denying the access to the executable file.\nSo disabling it worked for me.","Q_Score":0,"Tags":"python,pip","A_Id":60337104,"CreationDate":"2018-01-09T08:36:00.000","Title":"pip Access denied Windows 10","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have several scripts. Each of them does some computation and it is completely independent from the others. Once these computations are done, they will be saved to disk and a record updated. \nThe record is maintained by an instance of a class, which saves itself to disks. I would like to have a single record instance used in multiple scripts (for example, record_manager = RecordManager(file_on_disk). And then record_manager.update(...) ); but I can't do this right now, because when updating the record there may be concurrent write accesses to the same file on disk, leading to data loss. So I have a separate record manager for every script, and then I merge the records manually later.\nWhat is the easiest way to have a single instance used in all the scripts that solves the concurrent write access problem?\nI am using macOS (High sierra) and linux (Ubuntu 16.04).\nThanks!","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":204,"Q_Id":48165302,"Users Score":0,"Answer":"To build a custom solution to this you will probably need to write a short new queuing module. This queuing module will have write access to the file(s) alone and be passed write actions from the existing modules in your code. \nThe queue logic and logic should be a pretty straightforward queue architecture. \nThere may also be libraries that exist in python to handle this problem that would avoid you writing your own queue class.\nFinally, it is possible that this whole thing will be\/could be handled in some way by your OS, independent of python.","Q_Score":0,"Tags":"python,file,concurrency","A_Id":48165446,"CreationDate":"2018-01-09T09:43:00.000","Title":"Concurrent file accesses from different scripts python","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to execute spark job from on demand HD Insight cluster using Azure datafactory.\nDocumentation indicates clearly that ADF(v2) does not support datalake linked service for on demand HD insight cluster and one have to copy data onto blob from copy activity and than execute the job. BUT this work around seems to be a hugely resource expensive in case of a billion files on a datalake. Is there any efficient way to access datalake files either from python script that execute spark jobs or any other way to directly access the files.\nP.S Is there a possiblity of doing similar thing from v1, if yes then how? \"Create on-demand Hadoop clusters in HDInsight using Azure Data Factory\" describe on demand hadoop cluster that access blob storage but I want on demand spark cluster that access datalake.\nP.P.s Thanks in advance","AnswerCount":2,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":343,"Q_Id":48165947,"Users Score":1,"Answer":"Currently, we don't have support for ADLS data store with HDI Spark cluster in ADF v2. We plan to add that in the coming months. Till then, you will have to contiue using the workaround as you mentioned in your post above. Sorry for the inconvenience.","Q_Score":1,"Tags":"python,pyspark,azure-hdinsight,azure-data-factory,azure-data-lake","A_Id":48221294,"CreationDate":"2018-01-09T10:18:00.000","Title":"Access datalake from Azure datafactory V2 using on demand HD Insight cluster","Data Science and Machine Learning":1,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to execute spark job from on demand HD Insight cluster using Azure datafactory.\nDocumentation indicates clearly that ADF(v2) does not support datalake linked service for on demand HD insight cluster and one have to copy data onto blob from copy activity and than execute the job. BUT this work around seems to be a hugely resource expensive in case of a billion files on a datalake. Is there any efficient way to access datalake files either from python script that execute spark jobs or any other way to directly access the files.\nP.S Is there a possiblity of doing similar thing from v1, if yes then how? \"Create on-demand Hadoop clusters in HDInsight using Azure Data Factory\" describe on demand hadoop cluster that access blob storage but I want on demand spark cluster that access datalake.\nP.P.s Thanks in advance","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":343,"Q_Id":48165947,"Users Score":0,"Answer":"The Blob storage is used for the scripts and config files that the On Demand cluster will use. In the scripts you write and store in the attached Blob storage they can write from ADLS to SQLDB for example.","Q_Score":1,"Tags":"python,pyspark,azure-hdinsight,azure-data-factory,azure-data-lake","A_Id":49116105,"CreationDate":"2018-01-09T10:18:00.000","Title":"Access datalake from Azure datafactory V2 using on demand HD Insight cluster","Data Science and Machine Learning":1,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I run several processes in Python (using multiprocessing.Process) on an Ubuntu machine. \nEach of the processes writes various temporary files. Each process writes different files, but all files are in the same folder.\nIs there any potential risk of error here?\nThe reason I think there might be a problem is that, AFAIK, a folder in Unix is just a file. So it's jsut like several processes writing to the same file at the same time, which might cause a loss of information.\nIs this really a potential risk here? If so, how to solve it?","AnswerCount":3,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":1864,"Q_Id":48191238,"Users Score":2,"Answer":"This has absolutely nothing to do with Python, as file operations in Python use OS level system calls (unless run as root, your Python program would not have permissions to do raw device writes anyway and doing them as root would be incredibly stupid). \nA little bit of file system theory if anyone cares to read:\nYes, if you study file system architecture and how data is actually stored on drives, there are similarities between files and directories - but only on data storage level.  The reason being there is no need to separate these two.  For example ext4 file system has a method of storing information about a file (metadata), stored in small units called inodes, and the actual file itself. Inode contains a pointer to the actual disk space where file data can be found. \nFile systems generally are rather agnostic to directories. A file system is basically just this: it contains information about free disk space, information about files with pointers to data, and the actual data. Part of metadata is the directory where the file resides. In modern file systems (ancient FAT is the exception that is still in use) data storage on disk is not related to directories. Directories are used to allow both humans and the computer implementing the file system locate files and folders quickly instead of walking through sequentially the list of inodes until the correct file is found. \nYou may have read that directories are just files. Yes, they are \"files\" that contain either a list of files in it (or actually a tree but please do not confuse this with a directory tree - it is just a mechanism of storing information about large directories so that files in that directory do not need to be searched sequentially within the directory entry).  The reason this is a file is that it is the mechanism how file systems store data. There is no need to have a specific data storage mechanism, as a directory only contains a list of files and pointers to their inodes. You could think of it as a database or even simpler, a text file.  But in the end it is just a file that contains pointers, not something that is allocated on the disk surface to contain the actual files stored in the directory. \nThat was the background. \nThe file system implementation on your computer is just a piece of software that knows how to deal with all this. When you open a file in a certain directory for writing, something like this usually happens:\n\nA free inode is located and an entry created there \nFree clusters \/ blocks database is queried to find storage space for the file contents \nFile data is stored and blocks\/clusters are marked \"in use\" in that database \nInode is updated to contain file metadata and a\npointer to this disk space \n\"File\" containing the directory data of\nthe target directory is located \nThis file is modified so that one\nrecord is added. This record has a pointer to the inode just\ncreated, and the file name as well \nInode of the file is updated to\ncontain a link to the directory, too.\n\nIt is the job of operating system and file system driver within it to ensure all this happens consistently. In practice it means the file system driver queues operations.  Writing several files into the same directory simultaneously is a routine operation - for example web browser cache directories get updated this way when you browse the internet.  Under the hood the file system driver queues these operations and completes steps 1-7 for each new file before it starts processing the following operation. \nTo make it a bit more complex there is a journal acting as an intermediate buffer. Your transactions are written to the journal, and when the file system is idle, the file system driver commits the journal transactions to the actual storage space, but theory remains the same. This is a performance and reliability issue.\nYou do not need to worry about this on application level, as it is the job of the operating system to do all that. \nIn contrast, if you create a lot of randomly named files in the same directory, in theory there could be a conflict at some point if your random name generator produced two identical file names. There are ways to mitigate this, and this would be the part you need to worry about in your application. But anything deeper than that is the task of the operating system.","Q_Score":1,"Tags":"python,multiprocessing,directory","A_Id":48192334,"CreationDate":"2018-01-10T15:50:00.000","Title":"Can multiple processes write to the same folder?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I\u00b4m trying to reed some data from a barcode scanner in python, using the serial library. My inconvenient is that I\u00b4m connecting the barcode scanner to a Virtual Machine where I have a Debian running. I connect the scanner and ir read the data but I cannot identify what \/dev\/tty* is using, so I can pass as an argument to a server and parse the data it is pacing. In Debian theres is no \/dev\/ttyACM0 and don\u00b4t know why.\nAnswer to comment:\n\nHostOS: Windows 10. \nGuestOS: Debian 9 and\/or ubuntu 17.04.\nVMtool: workstation 14. All of them 64bit.  \nScanner CINO FUZZYSCAN Model: F680-BSUG.\nLibrary I was using pyserial, a couple of month a go I was able to use \/dev\/ttyACM0. Now when I run lsub it gave me this:Bus 001 Device 005: ID 1fbb:3681\nWhen run dmesg:\n[ 1026.204937] usbcore: registered new interface driver usbkbd\n[ 1051.955948] usb 1-2: USB disconnect, device number 4\n[ 1054.647592] usb 1-2: new full-speed USB device number 5 using ohci-pci\n[ 1055.137077] usb 1-2: New USB device found, idVendor=1fbb, idProduct=3681\n[ 1055.137083] usb 1-2: New USB device strings: Mfr=1, Product=2, SerialNumber=0\n[ 1055.137087] usb 1-2: Product: FUZZYSCAN\n[ 1055.137089] usb 1-2: Manufacturer: CINO\n[ 1055.150619] input: CINO FUZZYSCAN as \/devices\/pci0000:00\/0000:00:06.0\n\/usb1\/1-2\/1-2:1.0\/0003:1FBB:3681.0004\/input\/input10\n[ 1055.208155] hid-generic 0003:1FBB:3681.0004: input,hidraw1: USB HID v1.10 Keyboard [CINO FUZZYSCAN] on usb-0000:00:06.0-2\/input0\n\nSo is recognizing the device, but not mapping to \/dev\/ttyACM0.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":1056,"Q_Id":48193281,"Users Score":0,"Answer":"I finally get It, I haveI finally discovered it, I had the Scanner configured as PS2, instead of USB Com Port Emulation. Once I set up the scanner everything started to work fine.","Q_Score":0,"Tags":"python-2.7,debian,barcode-scanner","A_Id":48219220,"CreationDate":"2018-01-10T17:47:00.000","Title":"Barcode scanner, reading data from python USB or serial, how to identify what \/dev\/tty* is using the scanner","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Am using haystack with solr 6.6 for search indexing. Now i want to automatically update indexes when data changes in my models under indexing, so am using celery_haystack for that. Unfortunately, each time index should be updated i get could not load [app.model.pk]. Somehow it went missing error\n\npython 3.6.3\ndjango 1.11.6\ncelery 4.1.0\ndjango-haystack 2.7.dev0\ncelery-haystack 0.10\n\nThanks in advance.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":61,"Q_Id":48193410,"Users Score":0,"Answer":"Strangely after trying and trying i decided to restart the whole system and it just started working, without changing anything","Q_Score":0,"Tags":"python,django,solr,celery","A_Id":48265807,"CreationDate":"2018-01-10T17:55:00.000","Title":"Couldn't load \"object\". Somehow it went missing?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I have a Flask app that I run with uWSGI. I have configured logging to file in the Python\/Flask application, so on service start it logs that the application has been started.\nI want to be able to do this when the service stops as well, but I don't know how to implement it.\nFor example, if I run the uwsgi app in console, and then interrupt it with Ctrl-C, I get only uwsgi logs (\"Goodbye to uwsgi\" etc) in console, but no logs from the stopped python application. Not sure how to do this.\nI would be glad if someone advised on possible solutions.\nEdit:\nI've tried to use Python's atexit module, but the function that I registered to run on exit is executed not one time, but 4 times (which is the number of uWSGI workers).","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":183,"Q_Id":48206010,"Users Score":1,"Answer":"There is no \"stop\" event in WSGI, so there is no way to detect when the application stops, only when the server \/ worker stops.","Q_Score":0,"Tags":"python,logging,flask,uwsgi","A_Id":48211175,"CreationDate":"2018-01-11T11:29:00.000","Title":"Logging uWSGI application stop in Python","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I need to convert my .py files into .exe files for Python 3.6.4.  I have tried almost everything on Google and YouTube and none of it seems to work for me.  It seems as though a lot of the explanations either gloss over the most technical aspects of installing any modules that convert .py files into .exe files or they are outdated.  Can someone give me a step by step example of how to convert my .py files into .exe files for Python 3.6.4.?  I was able to convert the .py files easily for Python 3.4 but not 3.6.4.  My file path is: This Pc > C: > Users > XXXX > AppData > Local > Programs > Python > Python36-32","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":133,"Q_Id":48211634,"Users Score":0,"Answer":"Most of the external packages are still not supporting 3.6.\nTry with cx_Freeze in 3.6 else go with pyinstaller but python version should be 3.5(this works fine for me)","Q_Score":1,"Tags":"python-3.x","A_Id":51157311,"CreationDate":"2018-01-11T16:21:00.000","Title":"How to convert a .py file into a .exe file for Python 3.6.4","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm using Ubuntu 16.04 LTS with Anaconda 2, which takes over 5 gb disk space. Is it normal to take such large space, or I can make it smaller by removing some unnecessary folders?\nP.S. Some commands such as \"conda clean\" have been used, I just wonder if there are some repeated modules installed...","AnswerCount":3,"Available Count":2,"Score":0.1325487884,"is_accepted":false,"ViewCount":7715,"Q_Id":48226958,"Users Score":2,"Answer":"It depends what do you really want to use.\nInstall miniconda instead of Anaconda and then install required packages 1 by 1 using\n\nconda install\n\nthis will definitely reduce the size. :)","Q_Score":9,"Tags":"python,linux,python-2.7,ubuntu,anaconda","A_Id":48227608,"CreationDate":"2018-01-12T13:09:00.000","Title":"Is there any way to make anaconda smaller?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm using Ubuntu 16.04 LTS with Anaconda 2, which takes over 5 gb disk space. Is it normal to take such large space, or I can make it smaller by removing some unnecessary folders?\nP.S. Some commands such as \"conda clean\" have been used, I just wonder if there are some repeated modules installed...","AnswerCount":3,"Available Count":2,"Score":1.0,"is_accepted":false,"ViewCount":7715,"Q_Id":48226958,"Users Score":8,"Answer":"I have seen anaconda accumulate lots of garbage package caches and tarballs. To delete caches, tarballs and lock files which are not used and reduce a little bit the space used, you can try:\nconda clean -a","Q_Score":9,"Tags":"python,linux,python-2.7,ubuntu,anaconda","A_Id":59863417,"CreationDate":"2018-01-12T13:09:00.000","Title":"Is there any way to make anaconda smaller?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"When I type pip3 install --user Facebook in my CMD. Output appear as below   \nCould not find a version that satisfies the requirement facebook (from versions: )\nNo matching distribution found for facebook","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":911,"Q_Id":48253333,"Users Score":0,"Answer":"I just face this same issue. I solved by installing facebook-sdk instead just facebook.\nRun :- \u00a0pip install facebook-sdk or \u00a0pip3 install facebook-sdk","Q_Score":0,"Tags":"python-3.x,facebook,cmd,windows-10","A_Id":56398684,"CreationDate":"2018-01-14T19:26:00.000","Title":"Fail to install package Facebook in CMD","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"As a fact when creating a topic in kafka it is possible to set the replication factor however I was using a KafkaProducer (the kafka api for python pip install kafka) \nI thought I could do producer.send(...,replication-factor=3)but then there was no option for me to do that.\nNow I have only one option left is to directly create a shell script to connect to kafka to create a topic but then if the feature of python kafka is so lackluster why would I continue using it. So is there a way to set a replication factor when I am going to produce a kafka topic.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":907,"Q_Id":48263901,"Users Score":1,"Answer":"kafka-python does not support the Kafka Admin APIs at the moment. The only way to create topics via this client is to rely on the auto-create broker feature.\nHowever, as you've noticed, this does not allow you to provide any topic configurations.\nYou can either:\n\nSet the replication factor in the broker config (that will apply to all topics) by setting default.replication.factor=3 in the broker's server.properties file.\nUse a script (like the kafka-topics.sh tool) to explicitely create topics with custom settings.\n\nThe Kafka Admin APIs are still relatively new and very few clients apart from the official Java client support it.","Q_Score":0,"Tags":"python,apache-kafka,kafka-producer-api","A_Id":48264104,"CreationDate":"2018-01-15T13:24:00.000","Title":"Python KafkaProducer cannot set replication factor","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"For my automation purposes, I'm using Fabric. But I could not run 2 tasks at the same time?\nFor example, I want to run task 1 to collect data in the tmp folder. I want to run task 2 which will generate data and put in tmp. Tas1 2 will be running a bit before task 2.\nHere is my sudo code:\noutput1 = run(\".\/task1_data_logger &\")\noutput2 = run(\".\/task2_main_program\")        \nRESULT: Task2_main_program is running fine but I didn't see task1_data_logger running at all. I thought I put the & so that Task1 can be run in the background.\nI've read Parallel execution document but it is more for running parallel in multiple host, which is not my case. \nAnyone knows how to 2 tasks simultaneously instead of serially? \nThank you.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":114,"Q_Id":48273001,"Users Score":0,"Answer":"The task1 did not run at all because running a command with & in Fabric does not work.\nIt is because, in linux when you log out of a session all the processes associated with it are terminated.\nSo if you want to make sure a command keeps running even after you log out of the session you need to run it like this:\nrun('nohup sh command &')","Q_Score":0,"Tags":"python,parallel-processing,fabric","A_Id":48341150,"CreationDate":"2018-01-16T01:45:00.000","Title":"Running 2 tasks at the same time using Fabric","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have an app running on Heroku and I'm using celery together with a worker dyno to process background work.\nI'm running tasks that are using quite a lot of memory. These tasks get started at roughly the same time, but I want only one or two tasks to be running at the same time, the others must wait in the queue. How can I achieve that?\nIf they run at the same time I run out of memory and the system gets restarted. I know why it's using a lot of memory and not looking to decrease that","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":1789,"Q_Id":48283696,"Users Score":3,"Answer":"Quite simply: limit your concurrency (number of celery worker processes)  to the number of tasks that can safely run in parallel on this server. \nNote that if you have different tasks having widly different resource needs (ie one task that eats a lot of ram and takes minutes to complete and a couple ones that are fast and don't require much resources at all) you might be better using two distinct nodes to serve them (one for the heavy tasks and the other for the light ones) so heavy tasks don't block light ones. You can use queues to route tasks to different celery nodes.","Q_Score":3,"Tags":"python,heroku,celery","A_Id":48284437,"CreationDate":"2018-01-16T14:38:00.000","Title":"How to limit the number of tasks that runs in celery","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I am running a docker container that works perfectly on multiple different hosts. However when I run on AWS cr1.8xlarge one of the packages (bcolz) fails with \"invalid instruction\" error.\nI exec into the container and run bcolz.test() which fails. But if I pip uninstall bcolz and then reinstall the same version with pip install bcolz==1.1.1 and run bcolz.test() again and it works.\nHow can this be?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":110,"Q_Id":48287088,"Users Score":0,"Answer":"The setup.py compiles bcolz with different flags depending on the CPU. This means bcolz is not portable in a docker container.","Q_Score":0,"Tags":"python,docker,bcolz","A_Id":48287398,"CreationDate":"2018-01-16T17:48:00.000","Title":"Package fails in docker container. Reinstall and it works. Why?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Situation: I need to find the top level [root] directory of any operating system using the most Pythonic way possible, without system calls.\nProblem: While I can check for the operating system using things like if \"Windows\" in platform.system(), I cannot be too sure if the drive letter is always C:\\ or \/ (the latter being unlikely). I also cannot possibly be sure that there are only Windows and *NIXes that needs to be catalog.\nQuestion: Is there a way to get the top level directory of any operating system? Preferably using the os module since I am already using it.","AnswerCount":3,"Available Count":1,"Score":1.0,"is_accepted":false,"ViewCount":5801,"Q_Id":48333999,"Users Score":6,"Answer":"I believe os.path.abspath(os.sep) is close to what you are asking for.","Q_Score":5,"Tags":"python,python-2.7,python-os","A_Id":48334082,"CreationDate":"2018-01-19T04:10:00.000","Title":"How to get the filesystem's root directory in Python?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Is there a way to schedule a python script loading data to Bigquery without having to copy the authentication code generated from a google account link for each run. \nI am currently using the windows task scheduler to achieve this.","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":853,"Q_Id":48343024,"Users Score":0,"Answer":"You can create the credentials by following this link cloud.google.com\/storage\/docs\/authentication#service_accounts.\nIn the python script, you can pass the json file path directly to the function you are using to read\/write from\/to BQ with the private_key argument.\npandas_gbq.read_gbq(query, project_id= myprojectid, ..., private_key= 'jsonfilepath', dialect=\u2019legacy\u2019) \npandas.to_gbq(dataframe, destination_table, project_id, chunksize=10000, ..., private_key='jsonfilepath') \nThen you schedule the task to run the python script as you'll normally do with the windows task scheduler.","Q_Score":1,"Tags":"python,windows,oauth,google-bigquery","A_Id":48620815,"CreationDate":"2018-01-19T14:13:00.000","Title":"Schedule a python script loading data to BigQuery under windows 10","Data Science and Machine Learning":0,"Database and SQL":1,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Most terminal emulators allow you to configure it to make Option+Left\/Right Arrow jump forward or backward a word.  Is it possible to do this in the PyCharm Terminal?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":214,"Q_Id":48344243,"Users Score":0,"Answer":"If you haven't looked at the Keymap reference from the Help menu, please do so first. I tried doing Option+Left\/Right and I was able to navigate words in PyCharm Community Edition 2017.2.3. Also within the IDE, type Shift+CMD+A to find any action. However, in the PyCharm Terminal (View -> Tool Windows --> Terminal, Shift+Left\/Right key combination should work to navigate words.","Q_Score":1,"Tags":"python,pycharm","A_Id":48344507,"CreationDate":"2018-01-19T15:18:00.000","Title":"PyCharm Terminal: Make Option + Arrow Keys go backwards\/forwards a word","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have been using os.walk() to traverse a bunch of subdirectories inside a directory dir. These subdirectories are numbered from 0001 to 0899. I assumed that os.walk(dir) traverses these subdirectories in numerical order, i.e., as they are shown in the finder (I am on Mac), and so far I have had no reason to believe that this is not true. \nHowever, a few days ago I noticed something strange: os.walk() suddenly (?) traverses the folders non-numerically (but always in the same sequence, I think). I am fairly sure that this was not the case before - I would have noticed. \nI am aware that I can use sorted(os.walk(dir)) to have the subdirectories processed numerically, but that does not answer my question. How is it possible that the behaviour of os.walk() changed? Could it have to do with upgrading Python in the meantime (which I don't think I did - can this be checked somehow)?     \nEDIT: it occurred to my that I updated from OS Sierra to OS Sierra High in the meantime. Maybe that is where the answer lies?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":45,"Q_Id":48379797,"Users Score":0,"Answer":"I will answer my own question: it turns out that it was the fact that I had moved dir and its complete contents to a different place on my disk, thus giving them different addresses, that caused the different sorting.","Q_Score":0,"Tags":"python-3.x,sorting,directory","A_Id":48391262,"CreationDate":"2018-01-22T10:48:00.000","Title":"Strange behaviour of os.walk()","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have tensorflow 1.4.1 installed by pip, but the system-default gcc libs are not latest, that running\n\nimport tensorflow\n\nwill cause this error\n\nImportError: \/lib64\/libc.so.6: version 'GLIBC_2.16' not found\n\nSince I don't have root permission, I built the gcc libs, and use\n\nalias python_cpu='\/path\/ld-linux-x86-64.so.2 --library-path \/path\/other_libs \/path\/python'\n\nto run tensorflow on CPU.\nNow I've generated thousands of bash scripts and want to run them with qsub\nwithin each script oo.sh writes\n\n#!\/usr\/bin\/bash\npython_cpu python_script.py different_params\n\nI've tried the below ideas but all failed.\n\nUse qsub -V oo.sh to pass the alias into oo.sh.\nUse alias python_cpu=\"\" within the bash script.\nWithout alias, use '\/path\/ld-linux-x86-64.so.2 --library-path \/path\/other_libs \/path\/python' python_script.py params.\n\nBy the way the alias of TF works well with the bash shell command line. Any suggestions of what to do now?","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":658,"Q_Id":48404347,"Users Score":0,"Answer":"Get the scripts to work by\n#!\/usr\/bin\/bash\npython_cpu='\/path\/ld-linux-x86-64.so.2 --library-path \/path\/other_libs \/path\/python'\n$python_cpu python_script.py different_params\ninstead of using alias","Q_Score":1,"Tags":"python,linux,bash,shell,qsub","A_Id":48405314,"CreationDate":"2018-01-23T14:41:00.000","Title":"How to use ld-linux-x86-64.so.2 in bash script for qsub","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am putting together a Celery based data ingestion pipeline. One thing I do not see anywhere in the documentation is how to build a flow where workers are only running when there is work to be done. (seems like a major flaw in the design of Celery honestly)\nI understand Celery itself won't handle autoscaling of actual servers, thats fine, but when I simulate this Flower doesn't see the work that was submitted unless the worker was online when the task was submitted. Why? I'd love a world where I'm not paying for servers unless there is actual work to be done.\nWorkflow:\n\nImagine a While loop thats adding new data to be processed using the celery_app.send_task method.\nI have custom code that sees theres N messages in the queue. It spins up a Server, and starts a Celery worker for that task.\nCelery worker comes online, and does the work.\n\nBUT.\nFlower has no record of that task, even though I see the broker has a \"message\", and while watchings the output of the worker, I can see it did its thing. \nIf I keep the worker online, and then submit a task, it monitors everything just fine and dandy. \nAnyone know why?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":1419,"Q_Id":48425546,"Users Score":0,"Answer":"You can use celery autoscaling. For example setting autoscale to 8 will mean it will fire up to 8 processes to process your queue(s). It will have a master process sitting waiting though. You can also set a minimum, for example 2-8 which will have 2 workers waiting but fire up some more (up to 8) if it needs to (and then scale down when the queue is empty).\nThis is the process based autoscaler. You can use it as a reference if you want to create a cloud based autoscaler for example that fires up new nodes instead of just processes.\nAs to your flower issue it's hard to say without knowing your broker (redis\/rabbit\/etc). Flower doesn't capture everything as it relies on the broker doing that and some configuration causes the broker to delete information like what tasks have run.","Q_Score":1,"Tags":"python-3.x,celery,celery-task,flower","A_Id":53119548,"CreationDate":"2018-01-24T15:01:00.000","Title":"Celery with dynamic workers","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have been using atom code editor to write C code and run it using a gcc compiler, recently I started out on python code and have been trying to run python script using atom code editor but i keep on getting errors, is there a way to fix this?","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":1966,"Q_Id":48429246,"Users Score":1,"Answer":"Having run C on atom should not interfere with you running python. Make sure you've installed the python extension and you name your file with the py extension. Also, install the 'script' extension. Enter your script and hit command-I. The script extension should then run your script. Command-I is just a shortcut to run script. You can install these extensions (add-ons) by going to Preferences under the Atom menu item. This opens a window in Atom and you can install from a list of available extensions.","Q_Score":0,"Tags":"python,atom-editor","A_Id":48435723,"CreationDate":"2018-01-24T18:25:00.000","Title":"How to run python script using atom?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Which path is used in os.path.isfile(filename) in python. \nI have file in \/home\/debian and I have added that path in PYTHONPATH variable still os.path.isfile(filename) returns FALSE.","AnswerCount":1,"Available Count":1,"Score":0.537049567,"is_accepted":false,"ViewCount":875,"Q_Id":48434492,"Users Score":3,"Answer":"If filenameis relative, the current working directory (available with os.getcwd()) is used.\nPYTHONPATH is only used when importing modules.","Q_Score":0,"Tags":"python,pythonpath,os.path","A_Id":48434543,"CreationDate":"2018-01-25T01:59:00.000","Title":"why os.path.isfile returns false if file is other directory?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm using a cron task to schedule many jobs every 2 min.\nSince there are no higher resolution for less than a minute in cron, I make the python code call a randomised sleep command (between 0-60) so it will spread the execution time across a minute.\nThis works out fine for me.\nI'm just wondering that if I have a process which sleep for 50 seconds, does it keep hold of the memory during these 50 seconds? Can it cause performance problems?","AnswerCount":2,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":664,"Q_Id":48441559,"Users Score":2,"Answer":"Undoubtedly, whatever memory is consumed by Python and the startup of your script will stay in memory for the duration of the sleep, but since you have written the code you can organise things to minimise the memory usage until the sleep is over.\nAs to cpu performance, I'm sure that you will incur no overhead for the duration of the sleep.","Q_Score":2,"Tags":"python,linux,cron,sleep","A_Id":48441730,"CreationDate":"2018-01-25T11:14:00.000","Title":"Does sleep command slow the performance?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am working on a chat program with Python. I would like to use nohup because users always can access server when I am logout. \nI could run nohup very well. It was great.But I am a admin and I can write messages,and can see online users as using python. after I worked nohup, and logout, when I login I can't access the python progress. I want to foreground it again. \nYeah, I can see it in background with ps -aux . I see its PID,STAT but I don't know how to access it. I should access it.jobs doesn't see it. fg don't work. or I can't do. How can I do?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":122,"Q_Id":48466626,"Users Score":0,"Answer":"If you nohup a process, when you log out the parent of the process switches to being init (1) and you can't get control of it again.\nThe best approach is to have the program open a socket and then use that for ipc. You probably want to split your code in to 2 pieces - a daemon that runs in the background and keeps a socket open, and a client which connects to the socket to control the daemon.","Q_Score":1,"Tags":"python,linux,server,nohup,foreground","A_Id":48466757,"CreationDate":"2018-01-26T17:34:00.000","Title":"Access a progress that work background with nohup (LINUX) -get foreground","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have downloaded Anaconda on my computer however Anaconda is installed for all users on my mac therefore when I try and access python2.7 by typing in the path: \/anaconda3\/envs\/py27\/bin:\/anaconda3\/bin:\/usr\/local\/bin:\/usr\/bin:\/bin:\/usr\/sbin:\/sbin\nEven if I open from terminal the path above is not in the current directory since:\nmachintoshHD\/anaconda3\/....\nmachintoshHD\/Users\/adam\/desktop....\nhow can i redirect the configure script feature in the atom package script so that i can run python 2?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":423,"Q_Id":48481203,"Users Score":0,"Answer":"Only way I can change Atom python is to run it from a directory that has a different default python version. if I type python from a terminal window, whichever version of python that opens is the version Atom uses. I use virtual environments so I can run python 2.7.13 or python 3.6. If I want Atom to run python 3, I activate my python 3 environment and then run atom.\nThere may be a way to do this from within Atom but I haven't found it yet.","Q_Score":0,"Tags":"python,atom-editor","A_Id":48512683,"CreationDate":"2018-01-27T22:28:00.000","Title":"Atom script configure script run python 2.7","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm trying to deploy a simple python bot on Heroku but I get the error\ncouldn't find that process type \nWhen I try to scale the dynos. I already made a procfile and it looks like this:\nweb: gunicorn dep:app, where \"dep\" is the name of my python code  \nWhat could be the reason?","AnswerCount":6,"Available Count":3,"Score":1.0,"is_accepted":false,"ViewCount":49734,"Q_Id":48512013,"Users Score":7,"Answer":"Make Sure Procfile should not have any extension like .txt\notherwise this will be the error\nremote: -----> Discovering process types\n remote:        Procfile declares types -> (none)\nTo create file without extension type following in cmd \n notepad Procfile.\n\nNow add web: gunicorn dep:app and save\nNow when you will git push heroku master the above lines will be like\nremote: -----> Discovering process types\n remote:        Procfile declares types -> web\nAnd the error is gone when you will run\nC:\\Users\\Super-Singh\\PycharmProjects\\URLShortener>heroku ps:scale web=1\nScaling dynos... done, now running web at 1:Free","Q_Score":22,"Tags":"python,heroku","A_Id":50388192,"CreationDate":"2018-01-30T00:10:00.000","Title":"Couldn't find that process type, Heroku","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I'm trying to deploy a simple python bot on Heroku but I get the error\ncouldn't find that process type \nWhen I try to scale the dynos. I already made a procfile and it looks like this:\nweb: gunicorn dep:app, where \"dep\" is the name of my python code  \nWhat could be the reason?","AnswerCount":6,"Available Count":3,"Score":0.0,"is_accepted":false,"ViewCount":49734,"Q_Id":48512013,"Users Score":0,"Answer":"While it's not Python, in my case, I had heroku\/java followed by heroku\/pgbouncer. In Heroku's Settings, I switched them so heroku\/pgbouncer was on top. This fixed the issue. Perhaps your buildpacks need to be ordered differently if you are using multiple.","Q_Score":22,"Tags":"python,heroku","A_Id":71761780,"CreationDate":"2018-01-30T00:10:00.000","Title":"Couldn't find that process type, Heroku","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I'm trying to deploy a simple python bot on Heroku but I get the error\ncouldn't find that process type \nWhen I try to scale the dynos. I already made a procfile and it looks like this:\nweb: gunicorn dep:app, where \"dep\" is the name of my python code  \nWhat could be the reason?","AnswerCount":6,"Available Count":3,"Score":1.0,"is_accepted":false,"ViewCount":49734,"Q_Id":48512013,"Users Score":56,"Answer":"This may happen if your procfile is misspelt, such as \"procfile\" or \"ProcFile\" etc. The file name should be \"Procfile\" (with a capital P).\nsometimes changing the file name is not anough, because git wouldn't spot the change. I had to delete the Procfile completely, then commit the change, than add it again with the right name, and then commit that again:\n\nremove your procfile\ngit commit\nadd a new procfile with the exact name \"Procfile\"\ncommit again\ngit push heroku master (or main - new heroku projects now uses main)\n\nshould work!","Q_Score":22,"Tags":"python,heroku","A_Id":53184918,"CreationDate":"2018-01-30T00:10:00.000","Title":"Couldn't find that process type, Heroku","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"Apologies if this has been answered on here before, but I did some searching and was unable to find an answer.\nI'm taking over a Python application that runs on a remote Linux box, but need to do development locally on Windows. Naturally, I want the code I develop locally to match what gets deployed in production, but there are sections of the code that need to be handled differently between environments (due to library dependencies and OS minutiae).\nRight now I'm simply handling this via if statements and sys.platform like the following:\nif platform == \"linux\"\nand this works but seems to me like there would be a better way to implement it.\nIs there a more canonical or fault-tolerant way to do this?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":41,"Q_Id":48524573,"Users Score":0,"Answer":"The if is okay but don't litter that all over the code but try to isolate an API.  See for instance how the os module handles importing the appropriate platform dependent path module.","Q_Score":0,"Tags":"python,linux,windows","A_Id":48548392,"CreationDate":"2018-01-30T15:06:00.000","Title":"Is there a best-practice way to implement a Python script that handles Windows and Linux environments differently?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm trying to create a simple program using universe by openai but every time I close the VNC, the python launcher doesn't respond anymore and I have to force quit it. What can I do to solve this? Thanks","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":65,"Q_Id":48531314,"Users Score":0,"Answer":"I found out that it closes without crashing if I type in the terminal ctrl+c instead of ctrl+z as I did before.","Q_Score":0,"Tags":"python,vnc,openai-gym","A_Id":49056767,"CreationDate":"2018-01-30T22:06:00.000","Title":"Python launcher not responding after closing VNC (mac)","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am using fedora 27  and python 2.7 and I installed the last version of GCC but when I tried to install mysqlpython connector  by typing 'pip install mysqlpython' it show me an error.\n\ncommand 'gcc' failed with exit status 1","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":64,"Q_Id":48566024,"Users Score":0,"Answer":"Probably you're missing the python-devel package:\nsudo dnf install python-devel -y\nIt should be written in the last lines before the last error you've posted.","Q_Score":1,"Tags":"python-2.7,fedora,fedora-27","A_Id":48856425,"CreationDate":"2018-02-01T15:12:00.000","Title":"How to install Mysqlpython connector on fedora 27","Data Science and Machine Learning":0,"Database and SQL":1,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I was wondering if I can utilize UNIX commands on Python's IDLE program.\nI would just like to run very simple commands like: \n% wc foo.txt\nor \n% file foo.txt\nIf I cannot do this in IDLE, is there any other way to run these commands through Windows?\nThanks.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":42,"Q_Id":48566080,"Users Score":0,"Answer":"IDLE is an interface for running Python code.  You can only enter Python statements in the shell.  Python statements do not begin with '%'.\nI believe IPython uses '%' as an escape to run system commands.  If so, your question would make more sense if 'IDLE' were replaced by 'IPython'.  I believe the answer would still be 'No', but I don't know for sure.  Try searching for IPython docs.\nWindows 10 now has 'Ubuntu on Windows' (or something like that) for running linux shell commands on Windows.  I do not know more than this.  Again, do a web search.\nIf you install Git for Windows Git, a bash shell, compiled with mingw64, is included.  I have used it a tiny bit.  I don't know which unix utilities are included, or translated into Windows equivalents.  I also don't know if it is available separately.","Q_Score":0,"Tags":"python,windows,unix,python-idle","A_Id":48574716,"CreationDate":"2018-02-01T15:15:00.000","Title":"Getting UNIX commands on Python IDLE","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am thinking about switching from pip & virtualenv to pipenv.  But after studying the documentation I am still at a loss on how the creators of pipenv structured the deployment workflow.\nFor example, in development I have a Pipfile & a Pipfile.lock that define the environment.  Using a deployment script I want to deploy\n\ngit pull via Github to production server\npipenv install creates\/refreshes the environment in the home directory of the deployment user\n\nBut I need a venv in a specific directory which is already configured in systemd or supervisor.  E.g.: command=\/home\/ubuntu\/production\/application_xy\/env\/bin\/gunicorn module:app\npipenv creates the env in some location such as \n\/home\/ultimo\/.local\/share\/virtualenvs\/application_xy-jvrv1OSi\nWhat is the intended workflow to deploy an application with pipenv?","AnswerCount":5,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":16432,"Q_Id":48567245,"Users Score":25,"Answer":"You have few options there. \n\nYou can run your gunicorn via pipenv run:\npipenv run gunicorn module:app\n\nThis creates a slight overhead, but has the advantage of also loading environment from $PROJECT_DIR\/.env (or other $PIPENV_DOTENV_LOCATION).\n\nYou can set the PIPENV_VENV_IN_PROJECT environment variable. This will keep pipenv's virtualenv in $PROJECT_DIR\/.venv instead of the global location.\nYou can use an existing virtualenv and run pipenv from it. Pipenv will not attempt to create its own virtualenv if it's run from one.\nYou can just use the weird pipenv-created virtualenv path.","Q_Score":24,"Tags":"python,pipenv","A_Id":48696622,"CreationDate":"2018-02-01T16:17:00.000","Title":"pipenv: deployment workflow","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have installed Git on my system and the git command is working fine in the command prompt. I also updated my path varaibles to reflect the address of git bin and cmd. Now, I want to use the following command to install Theano library using Anaconda Prompt -\npip install git+git:\/\/github.com\/Theano\/Theano.git\nThe error I am getting is -\nError [WinError 2] The system cannot find the file specified while executing command git clone -q git:\/\/github.com\/fchollet\/keras.git C:\\Users\\Kritika\\AppData\\Local\\Temp\\pip-vp5qj204-build\nCannot find command 'git'\nI googled and found a lot of things but nothing seems to work for me. Can anybody help me here?","AnswerCount":2,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":8057,"Q_Id":48568090,"Users Score":1,"Answer":"First run the command \nconda install -c anaconda git\nthen run\ngit clone https:\/\/github.com\/Theano\/Theano.git","Q_Score":0,"Tags":"python,git,anaconda,theano","A_Id":61508765,"CreationDate":"2018-02-01T17:03:00.000","Title":"Git not recognised on Anaconda Prompt","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a web application that runs locally only (does not run on a remote server). The web application is basically just a ui to adjust settings and see some information about the main application. Web UI was used as opposed to a native application due to portability and ease of development. Now, in order to start and stop the main application, I want to achieve this through a button in the web application. However, I couldn't find a suitable way to start a asynchronous and managed task locally. I saw there is a library called celery, however that seems to be suitable to a distributed environment, which mine is not.\nMy main need to be able to start\/stop the task, as well as the check if the task is running (so I can display that in the ui). Is there any way to achieve this?","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":631,"Q_Id":48572082,"Users Score":1,"Answer":"celery can work just fine locally. Distributed is just someone else's computer after all :)\nYou will have to install all the same requirements and the like. You can kick off workers by hand, or as a service, just like in the celery docs.","Q_Score":1,"Tags":"python,django","A_Id":48572125,"CreationDate":"2018-02-01T21:33:00.000","Title":"Django asynchronous tasks locally","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"So I'm not sure how to word this correctly but I have a .sh file that I use to turn on my python app and it runs fine when I run this command .\/start_dev.sh in my terminal. But I am having trouble trying to have it run in pycharm because my app is run in Ubuntu and I don't know how to direct the interpreter path to my Ubuntu virtualenv bash command. Is this even possible?","AnswerCount":1,"Available Count":1,"Score":-0.1973753202,"is_accepted":false,"ViewCount":1297,"Q_Id":48573443,"Users Score":-1,"Answer":"You should be able to go to Run->Edit Configurations and then add configurations, including an Interpreter path where you can set the path to your virtualenv bash executable","Q_Score":0,"Tags":"python,bash,pycharm,sh","A_Id":48573531,"CreationDate":"2018-02-01T23:30:00.000","Title":"Unable to get pycharm to run my .sh file","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm using Spyder 3 bundled with Anaconda Python on Ubuntu. Usually with other Python IDEs (like IDLE,...) when i want to work inside a specific folder, I just go to that folder then open a terminal, type \"idle\" and the IDE pops up, then I can work inside that folder. \nBut with Spyder when i open a terminal, type \"spyder\" , the Spyder IDE still works at the default directory! How can I change this? Please help me, thank you very much","AnswerCount":2,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":1354,"Q_Id":48581973,"Users Score":1,"Answer":"(Spyder maintainer here) The options to configure the current working directory are present in\nTools > Preferences > Current working directory.\nWe don't have a graphical way to sync that with the directory of the terminal from which Spyder was started, but there's a command line option to do it, as @Bart\u0142omiej mentioned.","Q_Score":0,"Tags":"python,ubuntu,anaconda,spyder,python-idle","A_Id":48586985,"CreationDate":"2018-02-02T11:41:00.000","Title":"Spyder 3 (Anaconda) on Ubuntu- How to change working directory to that of terminal","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have seen a few variants of my question but not quite exactly what I am looking for, hence opening a new question. \nI have a Flask\/Gunicorn app that for each request inserts some data in a store and, consequently, kicks off an indexing job. The indexing is 2-4 times longer than the main data write and I would like to do that asynchronously to reduce the response latency. \nThe overall request lifespan is 100-150ms for a large request body.\nI have thought about a few ways to do this, that is as resource-efficient as possible:\n\nUse Celery. This seems the most obvious way to do it, but I don't want to introduce a large library and most of all, a dependency on Redis or other system packages. \nUse subprocess.Popen. This may be a good route but my bottleneck is I\/O, so threads could be more efficient.\nUsing threads? I am not sure how and if that can be done. All I know is how to launch multiple processes concurrently with ThreadPoolExecutor, but I only need to spawn one additional task, and return immediately without waiting for the results. \nasyncio? This too I am not sure how to apply to my situation. asyncio has always a blocking call. \nLaunching data write and indexing concurrently: not doable. I have to wait for a response from the data write to launch indexing. \n\nAny suggestions are welcome!\nThanks.","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":500,"Q_Id":48584712,"Users Score":0,"Answer":"Celery will be your best bet - it's exactly what it's for.\nIf you have a need to introduce dependencies, it's not a bad thing to have dependencies.  Just as long as you don't have unneeded dependencies.\nDepending on your architecture, though, more advanced and locked-in solutions might be available.  You could, if you're using AWS, launch an AWS Lambda function by firing off an AWS SNS notification, and have that handle what it needs to do.  The sky is the limit.","Q_Score":0,"Tags":"python,multithreading,asynchronous","A_Id":48588092,"CreationDate":"2018-02-02T14:23:00.000","Title":"Flask: spawning a single async sub-task within a request","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"as Python 3 is out I'd like to completely uninstall 2.7 on windows 10 64 bit. How can I achieve this?","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":7609,"Q_Id":48590065,"Users Score":0,"Answer":"Python installations can be very difficult to remove on Windows. If you delete some of the obvious content, the Python Launcher for Windows may still run, but it won't be able to complete the uninstall successfully.\nI installed the free [IObit Uninstaller], searched for all programs with py in the name, and was finally able to remove my old versions.","Q_Score":0,"Tags":"python","A_Id":60030851,"CreationDate":"2018-02-02T20:00:00.000","Title":"How to completely uninstall Python 2.7 on Windows 10?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"as Python 3 is out I'd like to completely uninstall 2.7 on windows 10 64 bit. How can I achieve this?","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":7609,"Q_Id":48590065,"Users Score":0,"Answer":"Removing paths and using the installer to uninstall solves the problem.","Q_Score":0,"Tags":"python","A_Id":54958477,"CreationDate":"2018-02-02T20:00:00.000","Title":"How to completely uninstall Python 2.7 on Windows 10?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"If a python script is executed in Linux, it will go to RAM and will be executed from there. Once it has executed and completed its task.\nWill python script code be immediately removed from RAM or will it stay their until computer needs that RAM space for any other task?\nIf someone runs a malicious python script and suppose RAM space is not required for any other task, then using RAM dump I want to get that python script.\nIts part of a research work, I only want answer to the question mentioned above.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":418,"Q_Id":48594892,"Users Score":0,"Answer":"I don't know whether I am correct or not, but RAM memory contains data of executable image which includes opcodes and other data available as image section data. A script is not self-executable. It needs some interpreter to execute.(For example cmd.exe for .bat script,php.exe for php, perl.exe for perl script).These application (a) either generate the compiled instruction of script and then execute it or (b) generate opcodes then run it.\nHowever, your problem is about malicious script. You can use a monitoring app to detect what interpreter runs. This type of app also notify you when any script wants to be executed.","Q_Score":1,"Tags":"python,linux,python-3.x,security,computer-forensics","A_Id":48618567,"CreationDate":"2018-02-03T07:09:00.000","Title":"Fetch python script from RAM dump","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"In taskwarrior there are some commands which need confirmirmation, like deleting more than 2 tasks or modify recurring tasks. I don't want to confirm every time and I have already set \"confirmation off\" in file .taskrc .\nI'm using the subprocess module in python to invoke taskwarrior commands. I'm calling for example task del 1,2,3 and the shell waits now for a manual confirmation of the deletion request.\nHow can I avoid the manual confirmation?","AnswerCount":2,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":512,"Q_Id":48606717,"Users Score":1,"Answer":"already added confirmation=no to ~\/.taskrc\na possible answer to the question could be \necho 'all' | task del 1,2,3\nbut there could be a better one","Q_Score":4,"Tags":"python,shell,subprocess,confirmation,taskwarrior","A_Id":48645932,"CreationDate":"2018-02-04T09:40:00.000","Title":"taskwarrior \"task del\" without confirmation dialog","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a website whose code contains a lot of computation (mostly in Python). Is there a way to perform those computations on Google App Engine every time and just return the results to the user?","AnswerCount":2,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":38,"Q_Id":48612807,"Users Score":1,"Answer":"Yes, that's exactly what App Engine is designed for.","Q_Score":0,"Tags":"python,google-app-engine,google-compute-engine","A_Id":48617341,"CreationDate":"2018-02-04T20:40:00.000","Title":"Linking a website to Google App Engine","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I am receiving the error: ImportError: No module named MySQLdb whenever I try to run my local dev server and it is driving me crazy. I have tried everything I could find online:\n\nbrew install mysql\npip install mysqldb\npip install mysql\npip install mysql-python\npip install MySQL-python\neasy_install mysql-python\neasy_install MySQL-python\npip install mysqlclient\n\nI am running out of options and can't figure out why I continue to receive this error. I am attempting to run my local dev server from using Google App Engine on a macOS Sierra system and I am using python version 2.7. I am also running: source env\/bin\/activate at the directory my project files are and am installing all dependencies there as well. My path looks like this: \n\/usr\/local\/bin\/python:\/usr\/local\/mysql\/bin:\/usr\/local\/opt\/node@6\/bin:\/usr\/local\/bin:\/usr\/bin:\/bin:\/usr\/sbin:\/sbin:\/Library\/Frameworks\/Python.framework\/Versions\/2.7\/bin\nDoes anyone have further ideas I can attempt to resolve this issue?","AnswerCount":3,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":865,"Q_Id":48617779,"Users Score":0,"Answer":"Turns out I had the wrong python being pointed to in my virtualenv. It comes preinstalled with its own default python version and so, I created a new virtualenv and used the -p to set the python path to my own local python path.","Q_Score":2,"Tags":"python,mysql,django,pip,mysql-python","A_Id":48712972,"CreationDate":"2018-02-05T07:39:00.000","Title":"VirtualEnv ImportError: No module named MySQLdb","Data Science and Machine Learning":0,"Database and SQL":1,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am receiving the error: ImportError: No module named MySQLdb whenever I try to run my local dev server and it is driving me crazy. I have tried everything I could find online:\n\nbrew install mysql\npip install mysqldb\npip install mysql\npip install mysql-python\npip install MySQL-python\neasy_install mysql-python\neasy_install MySQL-python\npip install mysqlclient\n\nI am running out of options and can't figure out why I continue to receive this error. I am attempting to run my local dev server from using Google App Engine on a macOS Sierra system and I am using python version 2.7. I am also running: source env\/bin\/activate at the directory my project files are and am installing all dependencies there as well. My path looks like this: \n\/usr\/local\/bin\/python:\/usr\/local\/mysql\/bin:\/usr\/local\/opt\/node@6\/bin:\/usr\/local\/bin:\/usr\/bin:\/bin:\/usr\/sbin:\/sbin:\/Library\/Frameworks\/Python.framework\/Versions\/2.7\/bin\nDoes anyone have further ideas I can attempt to resolve this issue?","AnswerCount":3,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":865,"Q_Id":48617779,"Users Score":0,"Answer":"In my project, with virtualenv, I just did\n\npip install mysqlclient\n\nand like magic everything is ok","Q_Score":2,"Tags":"python,mysql,django,pip,mysql-python","A_Id":71918271,"CreationDate":"2018-02-05T07:39:00.000","Title":"VirtualEnv ImportError: No module named MySQLdb","Data Science and Machine Learning":0,"Database and SQL":1,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I need to source an environment file\/Unix script from Python script to fetch the variables and use those variables in Python script.\nI am able to source the environment file\/Unix script but not able to fetch the value of the variable and use it.\nMy env file (env_var.env)looks like:-\nexport FLAG=YES;\nexport TAG=A;\nI want to source this file in my python script and need to print and use the values of FLAG and TAG.\nThanks in advance.","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":105,"Q_Id":48648352,"Users Score":1,"Answer":"To solve this I am created an Unix wrapper on top of my python script and source all the variables in that wrapper. I was able to import all the variables in python script.","Q_Score":1,"Tags":"python","A_Id":51906635,"CreationDate":"2018-02-06T17:09:00.000","Title":"How to use variables in Python by sourcing a shell file","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have installed python 3.6.4 on my MAC OS and have Eclipse neon 2.0 running. I have added pydev plugin to work on python projects. I need to import pandas library, but there is no such option as windows -> preferences -> libraries \nCan someone help me with any other way to install python libraries in neon 2.\nAnd also how to run python cmds in terminal window in pydev?\nThanks!","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":1889,"Q_Id":48649927,"Users Score":0,"Answer":"I faced same problem when working with eclipse pydev project.\nhere are steps that helped me resolve the issue\n\nIn eclipse open the workspace, click on Windows->Preferences->pydev-> interpreters-> python interpreter -> Click on Manage with PIP\n\nIn Command to execute , enter install pandas.\n\n\nProblem solved","Q_Score":1,"Tags":"eclipse,python-3.x,pandas,pydev","A_Id":71702890,"CreationDate":"2018-02-06T18:49:00.000","Title":"installing pandas in pydev eclipse neon 2","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I want to run my program if I type a specific command.\nMy Python program should take the test file as a command line argument. For example in the command prompt or the terminal, my program should run if you type \u201cpython my_program.py test.txt\u201d.","AnswerCount":4,"Available Count":2,"Score":0.049958375,"is_accepted":false,"ViewCount":69,"Q_Id":48654048,"Users Score":1,"Answer":"Open command prompt, make sure you are in the right directory. If you are on windows you can simply hold shift and right click the folder and open command line here. If not you can just manually navigate to the directory by using the cd (change directory) command.\nType python my_program.py test.txt and it will work.","Q_Score":0,"Tags":"python,terminal","A_Id":48654132,"CreationDate":"2018-02-07T00:17:00.000","Title":"How to run a program by typing a specific command","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I want to run my program if I type a specific command.\nMy Python program should take the test file as a command line argument. For example in the command prompt or the terminal, my program should run if you type \u201cpython my_program.py test.txt\u201d.","AnswerCount":4,"Available Count":2,"Score":0.049958375,"is_accepted":false,"ViewCount":69,"Q_Id":48654048,"Users Score":1,"Answer":"use the execfile built-in function from python, you can google it, there are many answers as well on this site with this info. Make research before asking.","Q_Score":0,"Tags":"python,terminal","A_Id":48654102,"CreationDate":"2018-02-07T00:17:00.000","Title":"How to run a program by typing a specific command","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have anaconda installed on my ubuntu 17.10. It works fine for python 2.7 but I can't use it in python 3.7. Is there a way I can add python3.7 to the anaconda path?","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":2945,"Q_Id":48667581,"Users Score":3,"Answer":"You can create a Python 3.7 environment via:\n$conda create -n Py37 python=3.7\nThis will create a new anaconda environment named Py37 containing the python=3.7 package. \nAfterwards, you can activate the environment by running:\n$conda activate Py37\nand it should work right out of the box!","Q_Score":1,"Tags":"python,ubuntu,anaconda,conda","A_Id":51832344,"CreationDate":"2018-02-07T15:33:00.000","Title":"Adding python3.7 to Anaconda path","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I want to use the packages lpsolve55 and openturns but they are not working on python 3.6, is there any way to install them for this version of python?","AnswerCount":1,"Available Count":1,"Score":0.3799489623,"is_accepted":false,"ViewCount":438,"Q_Id":48669430,"Users Score":2,"Answer":"lpsolve is available for python 3.x as well on conda-forge:\n\nconda config --add channels conda-forge\nconda install openturns lpsolve55","Q_Score":2,"Tags":"python-3.x,installation,windows-10,lpsolve,openturns","A_Id":54786256,"CreationDate":"2018-02-07T17:04:00.000","Title":"how can I install lpsolve55 and openturns for python 3.6 in windows 10?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Context: Basically I want to create a python program that asks me what Software I want to run, as soon as I start my computer.\nUsefull code: os.chdir(r'C:\/Program Files (x86)\/Google\/Chrome\/Application\/chrome.exe'). And that's the error I got : \n\nFileNotFoundError                         Traceback (most recent call last)\n   in ()\n  ----> 1 os.chdir(r\"C:\/Program Files (x86)\/Google\/Chrome\/Application\/chrome.exe'\")\n\nFileNotFoundError: [WinError 2] Das System kann die angegebene Datei nicht finden: \"C:\/Program Files (x86)\/Google\/Chrome\/Application\/chrome.exe'\"\nThe translation for \"Das System kann die angegebene Datei nicht finden:\" is the system was unable to find the file.\nProblem: My problem is that I can't run any \".exe\", or any type of files, because of the white spaces in \"C:\\Program Files (x86) \", so my question would be how can I bypass that? \/ What could I use to make it work?\nPS: I searched, on various forums, but this problem doesn't seem to be very common... Or I didn't search enough.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":621,"Q_Id":48675077,"Users Score":0,"Answer":"Use os.system() or give a folder path to change dir in os.chdir() not an executable file (why would you want to change into an executable? You can't do that)","Q_Score":1,"Tags":"python","A_Id":48675155,"CreationDate":"2018-02-07T23:32:00.000","Title":"How to run an \".exe\" file from \"C:\\Program Files (x86)\" using python?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"tryton V3.8 on MAC.  I have a database \"steve\" with trytond running TCP\/IP.  When doing database connect in tryton client, I get the following result as the last line in the error window: \"IOError: File not found : \/site-packages\/trytond\/modules\/product\/tryton.cfg\"  \nIn ~\/.bash_profile, I have: \n    export PYTHONPATH=~\/bryants:$PYTHONPATH \nwhere ~\/bryants has a init.py file, and all modules are beneath it.  \nThere is a tryton.cfg file in the ~\/bryants\/product directory.  Why isn't it looking in the ~\/bryants directory?  Why isn't it being found?","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":96,"Q_Id":48696759,"Users Score":1,"Answer":"Tryton search modules only in the subdirectory modules from its installation path or for the entry points trytond.modules But it does not use the PYTHONPATH to detect modules.\nSo you must move the modules under the \"modules\" directory or you must install the modules with python setup.py install (or python setup.py develop).","Q_Score":0,"Tags":"python-2.7,tryton","A_Id":48704012,"CreationDate":"2018-02-09T00:01:00.000","Title":"tryton file not found when opening database - looking in site-packages rather than directory in PYTHONPATH","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"For the purpose of safely updating a file, I am writing an updated version to a temporary file and then try to overwrite the original file with it. In a shell unix script I would use mv FROM TO for this.\nWith python on Linux, the functions os.rename and shutil.move perform an atomic replace operation when the target filename exists. On Windows, they fail.\nThe behavior can be approximated by a sequence of copy, rename and remove operations, but it cannot be guaranteed, that such a self-written replace operation is performed either finished or completely reverted.\nIs it possible to get a reliable \u201crename and overwrite\u201d operation on Windows?","AnswerCount":1,"Available Count":1,"Score":0.3799489623,"is_accepted":false,"ViewCount":1028,"Q_Id":48709540,"Users Score":2,"Answer":"As of Python 3.3, the function os.replace is available. It should provide cross-platform mv-like semantics.\nSadly it fails when trying to move files across file systems.\nEven though the documentation says, that shutil.move depends on the semantics of os.rename, it also works on Windows, and supports moving files across file-system boundaries. Sadly, I have seen cases where for some reason it still denied overwriting a file, so when possible, os.replace should be safer.","Q_Score":1,"Tags":"python,windows,filesystems","A_Id":48709541,"CreationDate":"2018-02-09T15:53:00.000","Title":"Move file and overwrite existing in Python 3.6 on Windows","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have PATH variable set for ffmpeg which I tested with CMD command echo %PATH% but Python's os.environ['PATH'] doesn't contain registry of it.  I'm using Jupyter notebook on Windows.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":481,"Q_Id":48718313,"Users Score":0,"Answer":"Rebooting session solved the problem. Somehow on my work computer reboot wasn't needed for environment variable to take effect.","Q_Score":2,"Tags":"python,ffmpeg,path,environment-variables,jupyter-notebook","A_Id":48719791,"CreationDate":"2018-02-10T07:22:00.000","Title":"os.environ['PATH'] doesn't match echo %PATH%","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am having problems trying to install the following packages on Ubuntu:\n\nscipy\nnumpy\nmatplotlib\npandas\nsklearn\n\nWhen I execute the command: \nsudo apt-get install python-numpy python-scipy python-matplotlib ipython ipython-notebook python-pandas python-sympy python-nose\nI get the following message: \nReading package lists... Done\nBuilding dependency tree\nReading state information... Done\nbuild-essential is already the newest version (12.1ubuntu2).\nYou might want to run 'apt-get -f install' to correct these:\nThe following packages have unmet dependencies.\n libatlas-dev : Depends: libblas-dev but it is not going to be installed\n libatlas3-base : Depends: libgfortran3 (>= 4.6) but it is not going to be installed\n                  Depends: libblas-common but it is not going to be installed\n python-dev : Depends: libpython-dev (= 2.7.11-1) but it is not going to be installed\n              Depends: python2.7-dev (>= 2.7.11-1~) but it is not going to be installed\n python-scipy : Depends: python-decorator but it is not going to be installed\n                Depends: libgfortran3 (>= 4.6) but it is not going to be installed\n                Recommends: python-imaging but it is not going to be installed\n python-setuptools : Depends: python-pkg-resources (= 20.7.0-1) but it is not going to be installed\n rstudio : Depends: libjpeg62 but it is not going to be installed\n           Depends: libgstreamer0.10-0 but it is not going to be installed\n           Depends: libgstreamer-plugins-base0.10-0 but it is not going to be installed\n           Recommends: r-base (>= 2.11.1) but it is not going to be installed\nE: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution).\n\n\nSo the packages are failing to install, but I really need these packages to begin a new project, how can I successfully install these packages?","AnswerCount":3,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":428,"Q_Id":48729174,"Users Score":0,"Answer":"U cannot install it using apt-get. u need to install pip first. After you install pip, just google about how to install different packages using pip","Q_Score":0,"Tags":"python,numpy,ubuntu,matplotlib,installation","A_Id":48729205,"CreationDate":"2018-02-11T07:03:00.000","Title":"How do I install packages for python ML on ubuntu?","Data Science and Machine Learning":1,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to install odoo in mac OS. I have installed all necessary requirements by referring a video on youtube and finally I tried to run server but I am getting an error like this:\n\nlalits-MacBook-Pro:odoo lalitpatidar$ .\/odoo-bin\nTraceback (most recent call last):\n  File \".\/odoo-bin\", line 5, in \n    __import__('pkg_resources').declare_namespace('odoo.addons')\n  File \"\/System\/Library\/Frameworks\/Python.framework\/Versions\/2.7\/Extras\/lib\/python\/pkg_resources.py\", line 1926, in declare_namespace\n    declare_namespace(parent)\n  File \"\/System\/Library\/Frameworks\/Python.framework\/Versions\/2.7\/Extras\/lib\/python\/pkg_resources.py\", line 1942, in declare_namespace\n    _handle_ns(packageName, path_item)\n  File \"\/System\/Library\/Frameworks\/Python.framework\/Versions\/2.7\/Extras\/lib\/python\/pkg_resources.py\", line 1912, in _handle_ns\n    loader.load_module(packageName); module.__path__ = path\n  File \"\/System\/Library\/Frameworks\/Python.framework\/Versions\/2.7\/lib\/python2.7\/pkgutil.py\", line 246, in load_module\n    mod = imp.load_module(fullname, self.file, self.filename, self.etc)\n  File \"\/Users\/lalitpatidar\/Desktop\/v10\/odoo\/odoo\/__init__.py\", line 60, in \n    import modules\n  File \"\/Users\/lalitpatidar\/Desktop\/v10\/odoo\/odoo\/modules\/__init__.py\", line 8, in \n    from . import db, graph, loading, migration, module, registry\n  File \"\/Users\/lalitpatidar\/Desktop\/v10\/odoo\/odoo\/modules\/graph.py\", line 13, in \n    import odoo.osv as osv\n  File \"\/Users\/lalitpatidar\/Desktop\/v10\/odoo\/odoo\/osv\/__init__.py\", line 4, in \n    import osv\n  File \"\/Users\/lalitpatidar\/Desktop\/v10\/odoo\/odoo\/osv\/osv.py\", line 4, in \n    from ..exceptions import except_orm\n  File \"\/Users\/lalitpatidar\/Desktop\/v10\/odoo\/odoo\/exceptions.py\", line 15, in \n    from tools.func import frame_codeinfo\n  File \"\/Users\/lalitpatidar\/Desktop\/v10\/odoo\/odoo\/tools\/__init__.py\", line 8, in \n    from misc import *\n  File \"\/Users\/lalitpatidar\/Desktop\/v10\/odoo\/odoo\/tools\/misc.py\", line 16, in \n    import passlib.utils\nImportError: No module named passlib.utils\n\nI am new in odoo and stackoverflow as well so please avoid my little mistake if any.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":661,"Q_Id":48729532,"Users Score":0,"Answer":"You can install passlib module using pip\nsudo pip install passlib","Q_Score":0,"Tags":"python-2.7","A_Id":48741455,"CreationDate":"2018-02-11T08:01:00.000","Title":"Error while running odoo in mac","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Tried searching many posts but unable to find the answer.\nI have a simple python script (test.py) written as:\n!\/usr\/bin\/env python (tried with #!\/usr\/bin\/python)\nprint(\"Hellow World\")\nbut when I am trying to run this script from command line (from the script location) as .\/test.py, it is always giving error\n\"'.' is not recognized as an internal or external command, operable program or batch file.\"\n\"which python\" is giving me below path:\n!\/cygdrive\/c\/Users\/User>\/AppData\/Local\/Programs\/Python\/Python36-32\/python\nI am able to run the script using \"python test.py\" but unable to understand the issue with \".\/\"","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":58,"Q_Id":48739050,"Users Score":0,"Answer":"You are running on Windows and trying to use semantics from a POSIX-like shell.\nInstead of running .\/tesy.py try start test.py","Q_Score":0,"Tags":"python,python-3.x","A_Id":48739078,"CreationDate":"2018-02-12T03:12:00.000","Title":"Unable to run python script from command line using .\/","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I got a task to make exports of several big tables in DB asynchronous because right now the amount of records is so big that it takes too much time. So I've successfully moved the code of exporting to the Celery task. It exports and saves the file in a folder on a server. But I am not able to get from the task the whole filename, which I could pass to the rest of code and therefore download it after completing the export process because the only thing Celery task can return is only the state of the result of performing the task (done or not yet or failed).  I am using Django\/Python + Celery + Redis. Thank you for any advice, it already borders me for several days.","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":379,"Q_Id":48749538,"Users Score":1,"Answer":"After helping comment from Danila, I have tried celery.result library, which I didnt know anything about before (surprisingly I also havent found any mention of it before). After importing ResultBase from celery.result, which captures the incoming results from task, I was finally able to get the URL of my generated file and therefore I got what I needed. Thank you","Q_Score":1,"Tags":"python,django,celery,celery-task","A_Id":48769758,"CreationDate":"2018-02-12T15:11:00.000","Title":"What is the best way to get URl of generated file within Celery task","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I'm working on distributing a python package that uses uwsgi and falcon to run an API.\nTo build it as a deb package I am using fpm. After some tinkering I have managed to get my package to include everything I need for my virtualenv, however now I am running into the problem that my service files aren't installing properly and I can't start the service with systemctl\nI build the package using:\nfpm -s virtualenv -t deb --prefix \/opt\/venvs\/{project_name} --version {$VERS} --name {project_name} path\/to\/setup.py path\/to\/requirements.txt\nInside my package I have systemd\/{service_name}.service, however the service files aren't in my package when I check the contents with dpkg -c {service_name}.deb | grep service\nHow can I get fpm to build the deb package with the service files correctly?\nThanks.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":117,"Q_Id":48755384,"Users Score":1,"Answer":"I found that it's possible to add an option --deb-systemd FILEPATH which points to which file should be put in systemd for the service and solved my issue.","Q_Score":0,"Tags":"python,virtualenv,deb","A_Id":48755624,"CreationDate":"2018-02-12T20:56:00.000","Title":"fpm python uwsgi service","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Can anyone of you help me with an automation task which involves connecting through rdp and automating certain task in a particular application which is stored in that server.\nI have found scripts for rdp connection and for Windows GUI automation seperately.\nBut in the integration, I have become a bit confused. \nIt will be great if anyone can help me with the python library name :)","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":1322,"Q_Id":48764814,"Users Score":2,"Answer":"It is not possible to automate a RDP window using pywinauto as RDP window itself is an image of a desktop. Printing control identifiers of the RDP window gives the UI of the screen. \nSolution is to install python+pywinauto in the remote machine.","Q_Score":0,"Tags":"python-3.x,user-interface,rdp,pywinauto","A_Id":49934460,"CreationDate":"2018-02-13T10:40:00.000","Title":"GUI Automation in RDP","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I want to create a standalone executable, I am using python 3.6 on 64 bit os. And while trying to install cx freeze I got this msg\n\nno matching distrubtion found for pyinstaller\n\nSame error with cxfreeze","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":768,"Q_Id":48794599,"Users Score":1,"Answer":"3.6 is supported by both now.    pip install pyinstaller should work\nIf you are by chance using an Anaconda environment you will have to conda install pip before you pip install pyinstaller","Q_Score":0,"Tags":"python-3.x,pyinstaller,cx-freeze","A_Id":48795211,"CreationDate":"2018-02-14T19:14:00.000","Title":"Is python 3.6 supported by pyinstaller or cxfreeze?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"so I am trying to launch Maya using Python 2.7 as subprocess. My goal for now is to fire it up and hand over some variables. \nLaunching is working, but it does throw errors I do not have when launching via a bat file.\nThe process is currently Windows 10 only and I am using Maya 2018 latest update.\nSeems like PyQT is not getting loaded this way:\n\nAutodesk\/Maya2018\/scripts\/startup\/initMainWindow.mel line 178: \n  ImportError: file ######\\Maya2018\\Python\\lib\\site-packages\\maya\\app\\general\\mayaMixin.py line 35: DLL load failed: The specified module could not be found., No module named PyQt4.QtCore \/\/ \n\nI tried launching using os.system as well as subprocess.Popen both resulting in the same error.\nMy current launch command is a simple call to the exe with no additional parameters. \nDo I maybe have to source PyQt myself if run via python call?\ncommand used is:\nsubprocess.Popen([r\"C:\/Program Files\/Autodesk\/Maya2018\/bin\/maya.exe\"])\nThanks\nThomas","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":732,"Q_Id":48806594,"Users Score":0,"Answer":"Solution:\nCalling the .exe seems to set all needed PYTHONPATH options needed for Maya to run. This is not the case when calling it from Python. \nManually adding it to the PYTHONPATH before executing solves the issue.","Q_Score":0,"Tags":"python,pyqt,maya","A_Id":48861511,"CreationDate":"2018-02-15T11:51:00.000","Title":"Maya python launch","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm using PythonAnywhere with Postgresql, and have run into several problems. When I try to do anything, such as python manage.py makemigrations, I get the following error :\n\nsudo: unknown user: root\nsudo: unable to initialize policy plugin\n\nAlso, I tried to use postgres -V, but I get command not found, and yet I can't use sudo to install it. \nFinally, I'm also not sure what my UNIX password is, but all my permissions are denied to me. \nStrangely, I've noticed the creation of a dead.letter file, which contains:\n\ngiles-liveconsole1 : Feb 17 09:25:05 : X : user NOT in sudoers ; TTY=unknown ; PWD=\/home\/X\/X\/X ; USER=X ; COMMAND=\/bin\/bash\ngiles-liveconsole2 : Feb 17 11:43:08 : X : user NOT in sudoers ; TTY=unknown ; PWD=\/etc ; USER=#0 ; COMMAND=\/usr\/bin\/vi \/etc\/passwd\ngiles-liveconsole2 : Feb 17 11:45:51 : X : user NOT in sudoers ; TTY=unknown ; PWD=\/etc ; USER=#0 ; COMMAND=\/usr\/bin\/vi \/etc\/passwd","AnswerCount":2,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":1874,"Q_Id":48842812,"Users Score":0,"Answer":"The problem was within my settings.py - I wasn't pointing the project to the correct database settings - username and password. I changed the settings to reflect those of my pythonanywhere details, and then I could operate manage.py properly from there.","Q_Score":0,"Tags":"python,django,pythonanywhere","A_Id":48919217,"CreationDate":"2018-02-17T15:21:00.000","Title":"sudo: unknown user: root via PythonAnywhere","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm using PythonAnywhere with Postgresql, and have run into several problems. When I try to do anything, such as python manage.py makemigrations, I get the following error :\n\nsudo: unknown user: root\nsudo: unable to initialize policy plugin\n\nAlso, I tried to use postgres -V, but I get command not found, and yet I can't use sudo to install it. \nFinally, I'm also not sure what my UNIX password is, but all my permissions are denied to me. \nStrangely, I've noticed the creation of a dead.letter file, which contains:\n\ngiles-liveconsole1 : Feb 17 09:25:05 : X : user NOT in sudoers ; TTY=unknown ; PWD=\/home\/X\/X\/X ; USER=X ; COMMAND=\/bin\/bash\ngiles-liveconsole2 : Feb 17 11:43:08 : X : user NOT in sudoers ; TTY=unknown ; PWD=\/etc ; USER=#0 ; COMMAND=\/usr\/bin\/vi \/etc\/passwd\ngiles-liveconsole2 : Feb 17 11:45:51 : X : user NOT in sudoers ; TTY=unknown ; PWD=\/etc ; USER=#0 ; COMMAND=\/usr\/bin\/vi \/etc\/passwd","AnswerCount":2,"Available Count":2,"Score":0.3799489623,"is_accepted":false,"ViewCount":1874,"Q_Id":48842812,"Users Score":4,"Answer":"In general, makemigrations should not be using sudo. If it is, then there's something in your django settings that's making it do that.\nYou don't need to run postgres - it's already running. See the Databases tab in your account for the connection details.","Q_Score":0,"Tags":"python,django,pythonanywhere","A_Id":48869817,"CreationDate":"2018-02-17T15:21:00.000","Title":"sudo: unknown user: root via PythonAnywhere","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"i have been trying to create an conda environment but i keep getting error saying resolve package not found however all the packages are already install.Even when i try to install any of the packages seperately it says package already installed.here is the error what i get\nconda env create -f tfdl_env.yml\nSolving environment: failed\nResolvePackageNotFound: \n\nwin_unicode_console==0.5=py35_0\ntk==8.5.18=vc14_0\nqt==5.6.2=vc14_6\nvs2015_runtime==14.0.25420=0\nlibpng==1.6.30=vc14_1\nopenssl==1.0.2l=vc14_0\nwincertstore==0.2=py35_0\njpeg==9b=vc14_0\nsix==1.10.0=py35_1\nzlib==1.2.11=vc14_0\nicu==57.1=vc14_0","AnswerCount":2,"Available Count":2,"Score":0.1973753202,"is_accepted":false,"ViewCount":1127,"Q_Id":48848755,"Users Score":2,"Answer":"I have encountered a similar problem, what I did to solve the problem was I removed all of those libraries which causing errors, by editing the .yml file. Why I did this? because some of packages are actually just support packages to others, which in my case the version of those packages didn't available any longer or didn't fit, but don't worry, once you update the .yml and re-run the command again, which in your case is \"conda env create -f tfdl_env.yml\", those failed package will be installed accordingly, triggered by the main packages that requiring those packages and find the most suited package. \nHope it helps.","Q_Score":3,"Tags":"python,anaconda","A_Id":50187215,"CreationDate":"2018-02-18T05:26:00.000","Title":"Not able to create conda environment in macboook air(Resolvepackagenotfound)","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"i have been trying to create an conda environment but i keep getting error saying resolve package not found however all the packages are already install.Even when i try to install any of the packages seperately it says package already installed.here is the error what i get\nconda env create -f tfdl_env.yml\nSolving environment: failed\nResolvePackageNotFound: \n\nwin_unicode_console==0.5=py35_0\ntk==8.5.18=vc14_0\nqt==5.6.2=vc14_6\nvs2015_runtime==14.0.25420=0\nlibpng==1.6.30=vc14_1\nopenssl==1.0.2l=vc14_0\nwincertstore==0.2=py35_0\njpeg==9b=vc14_0\nsix==1.10.0=py35_1\nzlib==1.2.11=vc14_0\nicu==57.1=vc14_0","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":1127,"Q_Id":48848755,"Users Score":0,"Answer":"Delete the mentioned packages by editing the .yml file and run the command for environment creation. It works fine. Hope this helps.","Q_Score":3,"Tags":"python,anaconda","A_Id":52279615,"CreationDate":"2018-02-18T05:26:00.000","Title":"Not able to create conda environment in macboook air(Resolvepackagenotfound)","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a Raspberry Pi connected to a Seagate Backup Plus 3T external hard drive.\nI've written a Python script to make backup copies of files from my Windows File Server onto the external hard drive.\nEverything SEEMS to be running fine.  But when I copy a file from the external hard drive back to the Windows File Server, I have random bit errors... specifically the high order bit of random bytes will be a '1' in the copied file (i.e. 0x31 ==> 0xB1, 0x2B ==> 0xAB, 0x71 ==> 0xF1).\nIn a 9MB .MOV file, I've got 13 of these random bit errors.\nIn the python application, I've used both shutil.copy2 function to copy the files, and I've written a subroutine to open files for binary read\/write and copy 1MB at a time.\nWhen I connected the external hard drive to a Windows 10 machine and tried to copy files from File Server to external hard drive and back, I didn't get any errors.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":74,"Q_Id":48859707,"Users Score":0,"Answer":"Finally got it figured out.  After additional trial and error, I figured out that there is something wrong with the wired network port on the Pi.  Everything works fine if I swap out my Pi3 with my Pi1, and the Pi3 works if I use the WiFi (been using wired port for speed).","Q_Score":0,"Tags":"python,raspberry-pi,usb-drive","A_Id":48959545,"CreationDate":"2018-02-19T04:53:00.000","Title":"Raspberry Pi: File copy to Seagate Backup Plus Bit Errors","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am installing Python Jenkins package on Windows 7 x64 bit PC.\nI got following error: \n\n'C1083: Cannot open include file: 'sys\/param.h''. Python version\n  2.7.12.\n\nAny help is appreciated.","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":1227,"Q_Id":48861862,"Users Score":0,"Answer":"\"sys\/param.h\" is known from unix\/linux environments only.\nI am not that sure but it might be further available with GNU C as well.\nI have to assume something in your configuration or setup went horribly wrong.\nAs this question is rather specific to a certain project you might have more luck finding the answer if asking this directly at their project support channels.","Q_Score":0,"Tags":"python,jenkins,installation,packages","A_Id":49557738,"CreationDate":"2018-02-19T08:12:00.000","Title":"C1083: Cannot open include file: 'sys\/param.h' error message while installing python jenkins package","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Is there a quick and simple way to convert HDF5 files to netcdf(4) from the command line in bash?  Alternatively a simple script that handle such a conversion automatically in R, NCL or python ?","AnswerCount":3,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":5482,"Q_Id":48864357,"Users Score":6,"Answer":"with netcdf-c library you can: $ nccopy in.h5 out.nc","Q_Score":2,"Tags":"python,r,hdf5,netcdf4,ncl","A_Id":48870492,"CreationDate":"2018-02-19T10:43:00.000","Title":"Convert hdf5 to netcdf4 in bash, R, python or NCL?","Data Science and Machine Learning":1,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"The script create some files in directories which need sudo permissions and executes few command that also need sudo privillage.\nI want to execute that script giving sudo privillage.\nIs there any way to do that ? \nI am trying to execute it with python-shell module as well as spawn child process.","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":774,"Q_Id":48866753,"Users Score":0,"Answer":"It's bad practice to give sudo, as a hacker could do anything if there is any security issues. You could give the user witch runs the web server the permission to do the task your task is intending to do.\nIn general try to avoid root whenever you can.","Q_Score":1,"Tags":"python,node.js","A_Id":48867119,"CreationDate":"2018-02-19T12:57:00.000","Title":"How to execute a Python script in Node.js with sudo privillege","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"The script create some files in directories which need sudo permissions and executes few command that also need sudo privillage.\nI want to execute that script giving sudo privillage.\nIs there any way to do that ? \nI am trying to execute it with python-shell module as well as spawn child process.","AnswerCount":2,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":774,"Q_Id":48866753,"Users Score":1,"Answer":"I never got any answer on it, So I researched it on my own. The besy way to run any shell command or script is by using node-cmd moudle. It works soo bright .\nJust run the node script with sudo privillege, and you are good to go .","Q_Score":1,"Tags":"python,node.js","A_Id":48942162,"CreationDate":"2018-02-19T12:57:00.000","Title":"How to execute a Python script in Node.js with sudo privillege","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"We have an ERPNext open software which is working fine on AWS Large Instance of 500 GB HDD. Recently, as it is an excess configuration for our usage, we downgraded to Medium Instance and 20 GB HDD. Also, we have changed the OS, from Ubuntu 14.x to 16.x. So the python version also got changed(i.e., Python 2.7.6 to Python 2.7.12). From then, we are facing a frequent disconnecting issue i.e., it shows site not found when we access the site. We are using Elastic IP. We upgraded to a Large instance and the same issue still continuous. So it is not an instance issue. \nI feel this is weird because, when few people at my office, says it is not working, I can access the site from my home at the same point of the time. But, they are able to access other sites, except this ERP site.\nI'm not getting what caused the problem. Can anyone help me with this? Is this a problem with AWS or IP issues or Ubuntu 16.04 not supporting ERPNext or Python Version? I've left with no clue. Any help is greatly appreciated. Thanks.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":77,"Q_Id":48890843,"Users Score":0,"Answer":"This is due to fail2ban which is treating no.of requests from a LAN connection as bruteforce attack and hence blocking the further requests. After purging fail2ban everything worked fine.","Q_Score":0,"Tags":"python,amazon-web-services,erpnext","A_Id":48911671,"CreationDate":"2018-02-20T17:20:00.000","Title":"ERPNext on AWS server disconnectng frequently","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I recently installed the pyinsane2 module using pip install pyinsane2. It was successfully installed. Running >>>import pyinsane2 in my python interpreter returns >>> wich I assume is a good sign, meaning that it was installed.\nWhen I run my .py file in the command line using pathtodirectory> scan.py and hit enter, it gives me a ModuleNotFound Error in line 4, where it says import pyinsane2. I'm working with Python 3.6 on a windows 8 64-bit computer. I write my code with Notepad++.\nWhen looking for answers in the web, it was suggested to look whether my python version and the  module are in the same directory. \nI found out that my version of Python is in \"C:\\Users\\MyName\\AppData\\Local\\Programs\\Python\\Python36-32\\python.exe\" using sys.executable(where python shows the same path). Then I found out where my modules are stored using sys.path. It showed \"C:\\Users\\MyName\\AppData\\Local\\Programs\\Python\\Python36-32\\Lib\\site-packages\\pyinsane2-2.0.2-py3.6-win32.egg\"(Why pyinsane2 didn't show up, even though the directory exists in site-packeges as well, I don't know) and now I am supposed to put both, python and the modules in one directory...\nSo finally, my question is, if that is the correct way to solve this? If yes, what do I have to move\/do to get python and the modules in the same directory? \nIf not, what would you suggest to fix the error of looking in the wrong directory for the modules? \nP. S. I know there are many veriosn of this question out already, so feel free to mark as duplicate, but I couldn't find one that was using either windows python 3.6 or was not using ubuntu or anaconda...","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":546,"Q_Id":48919965,"Users Score":0,"Answer":"So finally, my question is, if that is the correct way to solve this?\n\nNo, you don't move\/copy anything like for fixing library imports.\nI guess pip install (or any other pip) command by default installs it to the latest\/compatible python2 version. If you want it in python3, pip3 is the command. But I'm assuming you have python2 installed on your machine. Otherwise I don't think you will be facing such issues.","Q_Score":0,"Tags":"python,python-3.x,python-module,sys","A_Id":48920027,"CreationDate":"2018-02-22T05:01:00.000","Title":"ModuleNotFound Error even though >>>import  works","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"While exporting google spreadsheets from ndb datastore which is hardly of 2 MB size, eats up 128 Mb of run time memory of google app engine? how this is possible? i made a bulk.yaml file also, and i am using gapi calls and defer to export sheet  on google app engine and it is showing error of EXceeding run time memory","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":72,"Q_Id":48924431,"Users Score":2,"Answer":"I've had the same issue with the old Python gdata library when I exported data from Cloud Datastore (NDB lib) to Google Spreadsheets.\nNormally, the issue didn't occur at the first export, but often at some later point. I was looking into the memory usage of instances over time and it was increasing with every export job.\nThe reason was a memory leak in my Python (2.7) code that handled the export. If I remember correctly, I had dicts and lists with plenty of references, some of them potentially in cycles, and the references haven't been explicitly deleted after the job was completed. At least with gdata there was a lot of meta-data in memory for every cell or row the code referenced.\nI don't think this is an issue particular to Google App Engine, Spreadsheets, or the libraries you are using, but how Python deals with garbage collection. If there are references left, they will occupy memory.","Q_Score":2,"Tags":"python,google-app-engine","A_Id":48927054,"CreationDate":"2018-02-22T09:58:00.000","Title":"Exceeding Soft private run time memory error","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I currently have a Python scrip that runs through all Excel files in the current directory and generates a PDF report. \nIt works fine now but I don't want the users to be anywhere near frozen Python scripts. I created an MSI with cxFreeze which puts the EXE and scripts in the Program Files directory. \nWhat I would like to be able to do is create a shortcut to this executable and pass the directory the shortcut was run from to the Python program so that can be set as the working directory. This would allow the user to move the shortcut to any folder of Excel files and generate a report there. \nDoes Windows send the location of a opened shortcut to the executable and is there a way to access it from Python?","AnswerCount":3,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":1595,"Q_Id":48998492,"Users Score":0,"Answer":"Is there a problem with modifying the script to take the directory to process as a command line argument?  \nYou could then configure the different shortcuts to pass in the appropriate directory.","Q_Score":1,"Tags":"python,windows,windows-installer,cx-freeze","A_Id":48998812,"CreationDate":"2018-02-26T23:01:00.000","Title":"Is it possible to access the launching shortcut directory from a Python executalbe?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I just got a new mac, and immediately installed Anaconda with python 3.6. However, I now need to go back and use python 2.7 for a project. This project also requires a few packages which could normally be installed with pip. However, after I installed anaconda, pip defaults to working with python3. \nHow can I access (or install, as it does not appear that the mac comes preloaded with pip for python 2.7) the pip for the python 2.7 that comes preloaded on the mac? \n**I have tried pip2, pip2.7 as some other posts have suggested. \n*** When I try to install pip (sudo easy_install pip) it defaults to looking at the Anaconda distribution)","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":1768,"Q_Id":48999177,"Users Score":0,"Answer":"I have been struggling for this problem for weeks but finally fixed it what you have to do is move the pip package to and updated 'sites-packages' folder. for me, I downloaded pygame and the pip correctly install but wasn't working on my python3 editor. I went into my finder and went to MacintoshHD\/frameworks\/python\/versions. Then I opened up a new tab in finder at the same location. Then for both the 3.8 and the 2.7 versions go to \/lib\/python\/site-packages. then you will see the pip packages in the 2.7 'site-packages folder' you want to move those files to the 3.8 \"site-packages\" folder. It worked for me! hope it works for you!","Q_Score":0,"Tags":"python,macos,python-2.7,pip,anaconda","A_Id":61524906,"CreationDate":"2018-02-27T00:16:00.000","Title":"Using pip for python 2.7, After having installed Anaconda with 3.6 (mac)","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to execute a python code using PyPy2 v5.10 on MacOS El Capitan 10.11.6. However, I keep getting this error during runtime.\n\ndyld: lazy symbol binding failed: Symbol not found: _clock_gettime\n  Referenced from: \/Users\/macpro\/Downloads\/pypy2-v5.10.0-osx64\/bin\/\/libpypy-c.dylib\n  Expected in: flat namespace\n  dyld: Symbol not found: _clock_gettime\n  Referenced from: \/Users\/macpro\/Downloads\/pypy2-v5.10.0-osx64\/bin\/\/libpypy-c.dylib\n  Expected in: flat namespace\n  fish: '.\/pypy contactTrace.py' terminated by signal SIGTRAP (Trace or breakpoint trap)\n\nI have read from a few sources that its because El Capitan does not implement the clock but delcares it. Hence, one solution is to upgrade the software or comment out the declaration. Upgrading the software is not an option for me because I have a lot of other scripts running in that particular computer. I was trying to comment out the declaration but I am unable to find where I can comment it off. Also, will it really solve the issue? Or are there any more simpler solutions to it. I am not very familiar with the MacOS platform and am only using it for this project.\nThanks in advance!","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":1255,"Q_Id":49000335,"Users Score":0,"Answer":"That sounds like a wrongly linked libSystem.dylib, and that will be hard to fix (e.g. checking libs with otool and modifying lib with install_name_tool). However, there are newer versions of PyPy. Do you have tried them?","Q_Score":0,"Tags":"macos,python-2.7,pypy","A_Id":49023589,"CreationDate":"2018-02-27T02:51:00.000","Title":"dyId: Symbol not found: _clock_gettime","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Does someone have a solution for detecting and mitigating TCP SYN Flood attacks in the SDN environment based on POX controller?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":613,"Q_Id":49003874,"Users Score":0,"Answer":"As my understand, you may need to prepare third-party program for collect flow information (e.g. sFlow). and write one program for communicating with SDN Controller. SDN Controller cover all traffic on switches. It don't handle over L4 event in general case","Q_Score":0,"Tags":"python,sdn,pox","A_Id":49146800,"CreationDate":"2018-02-27T08:05:00.000","Title":"Python Code to detect and mitigate TCP SYN Flood attacks in SDN and POX controller","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"My Django App makes SSH connections to n number of machines (using a multithreaded python function). When replica=n is set in kubernetes deployment.yaml file then I want my app to distribute the connections among the n replicas.\nI mean 1 replica should connect to k number machines, another to next k number of machines and so on. When all the replicas are done then it should take the connections in cyclic fashion i.e. next k connections to first machine and another next k to other machine.\nI tried with 2 replicas but all the connections are getting established by both the pods (replicas).\nI want those connections to be distributed among the pods. How can I achieve this?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":32,"Q_Id":49010952,"Users Score":0,"Answer":"If the replica count will not change after launch you can get this info from kube api and then have your pods run from statefulset so they have sequential ids, then use the good old trick of mod N = 0..N-1 to divide work from the list in an even fashion and you should be fine.","Q_Score":0,"Tags":"python,django,multithreading,ssh,kubernetes","A_Id":49011385,"CreationDate":"2018-02-27T14:24:00.000","Title":"Distribute ssh connections made by Django App (multi-threaded python function) among n number of Kubernetes Replicas","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"Trying to run the most basic test of add.delay(1,2) using celery 4.1.0 with Python 3.6.4 and getting the following error:\n\n[2018-02-27 13:58:50,194: INFO\/MainProcess] Received task:\n  exb.tasks.test_tasks.add[52c3fb33-ce00-4165-ad18-15026eca55e9]\n  [2018-02-27 13:58:50,194: CRITICAL\/MainProcess] Unrecoverable error:\n  SystemError(' returned a result with an error set',) Traceback (most\n  recent call last):   File\n  \"\/opt\/myapp\/lib\/python3.6\/site-packages\/kombu\/messaging.py\", line 624,\n  in _receive_callback\n      return on_m(message) if on_m else self.receive(decoded, message)   File\n  \"\/opt\/myapp\/lib\/python3.6\/site-packages\/celery\/worker\/consumer\/consumer.py\",\n  line 570, in on_task_received\n      callbacks,   File \"\/opt\/myapp\/lib\/python3.6\/site-packages\/celery\/worker\/strategy.py\",\n  line 145, in task_message_handler\n      handle(req)   File \"\/opt\/myapp\/lib\/python3.6\/site-packages\/celery\/worker\/worker.py\", line\n  221, in _process_task_sem\n      return self._quick_acquire(self._process_task, req)   File \"\/opt\/myapp\/lib\/python3.6\/site-packages\/kombu\/async\/semaphore.py\",\n  line 62, in acquire\n      callback(*partial_args, **partial_kwargs)   File \"\/opt\/myapp\/lib\/python3.6\/site-packages\/celery\/worker\/worker.py\", line\n  226, in _process_task\n      req.execute_using_pool(self.pool)   File \"\/opt\/myapp\/lib\/python3.6\/site-packages\/celery\/worker\/request.py\",\n  line 531, in execute_using_pool\n      correlation_id=task_id,   File \"\/opt\/myapp\/lib\/python3.6\/site-packages\/celery\/concurrency\/base.py\",\n  line 155, in apply_async\n      **options)   File \"\/opt\/myapp\/lib\/python3.6\/site-packages\/billiard\/pool.py\", line 1486,\n  in apply_async\n      self._quick_put((TASK, (result._job, None, func, args, kwds)))   File\n  \"\/opt\/myapp\/lib\/python3.6\/site-packages\/celery\/concurrency\/asynpool.py\",\n  line 813, in send_job\n      body = dumps(tup, protocol=protocol) TypeError: can't pickle memoryview objects\nThe above exception was the direct cause of the following exception:\nTraceback (most recent call last):   File\n  \"\/opt\/myapp\/lib\/python3.6\/site-packages\/celery\/worker\/worker.py\", line\n  203, in start\n      self.blueprint.start(self)   File \"\/opt\/myapp\/lib\/python3.6\/site-packages\/celery\/bootsteps.py\", line\n  119, in start\n      step.start(parent)   File \"\/opt\/myapp\/lib\/python3.6\/site-packages\/celery\/bootsteps.py\", line\n  370, in start\n      return self.obj.start()   File \"\/opt\/myapp\/lib\/python3.6\/site-packages\/celery\/worker\/consumer\/consumer.py\",\n  line 320, in start\n      blueprint.start(self)   File \"\/opt\/myapp\/lib\/python3.6\/site-packages\/celery\/bootsteps.py\", line\n  119, in start\n      step.start(parent)   File \"\/opt\/myapp\/lib\/python3.6\/site-packages\/celery\/worker\/consumer\/consumer.py\",\n  line 596, in start\n      c.loop(*c.loop_args())   File \"\/opt\/myapp\/lib\/python3.6\/site-packages\/celery\/worker\/loops.py\", line\n  88, in asynloop\n      next(loop)   File \"\/opt\/myapp\/lib\/python3.6\/site-packages\/kombu\/async\/hub.py\", line 354,\n  in create_loop\n      cb(*cbargs)   File \"\/opt\/myapp\/lib\/python3.6\/site-packages\/kombu\/transport\/base.py\", line\n  236, in on_readable\n      reader(loop)   File \"\/opt\/myapp\/lib\/python3.6\/site-packages\/kombu\/transport\/base.py\", line\n  218, in _read\n      drain_events(timeout=0)   File \"\/opt\/myapp\/lib\/python3.6\/site-packages\/librabbitmq-2.0.0-py3.6-linux-x86_64.egg\/librabbitmq\/init.py\",\n  line 227, in drain_events\n      self._basic_recv(timeout) SystemError:  returned a result with an error set\n\nI cannot find any previous evidence of anyone hitting this error.  I noticed from the celery site that only python 3.5 is mentioned as supported, is that the issue or is this something I am missing?\nAny help would be much appreciated!\nUPDATE: Tried with Python 3.5.5 and the problem persists. Tried with Django 4.0.2 and the problem persists.\nUPDATE: Uninstalled librabbitmq and the problem stopped. This was seen after migration from Python 2.7.5, Django 1.7.7 to Python 3.6.4, Django 2.0.2.","AnswerCount":1,"Available Count":1,"Score":0.6640367703,"is_accepted":false,"ViewCount":3865,"Q_Id":49018923,"Users Score":4,"Answer":"After uninstalling librabbitmq, the problem was resolved.","Q_Score":6,"Tags":"python-3.x,celery,typeerror,pickle,memoryview","A_Id":50096071,"CreationDate":"2018-02-27T22:22:00.000","Title":"TypeError: can't pickle memoryview objects when running basic add.delay(1,2) test","Data Science and Machine Learning":1,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I want to create a minimal webpage where concurrent users can upload a file and I can process the file (which is expected to take some hours) and email back to the user later on.\nSince I am hosting this on AWS, I was thinking of invoking some background process once I receive the file so that even if the user closes the browser window, the processing keeps taking place and I am able to send the results after few hours, all through some pre-written scripts.\nCan you please help me with the logistics of how should I do this?","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":912,"Q_Id":49027447,"Users Score":1,"Answer":"Here's how it might look like (hosting-agnostic):\n\nA user uploads a file on the web server\nThe file is saved in a storage that can be accessed later by the background jobs\nSome metadata (location in the storage, user's email etc) about the file is saved in a DB\/message broker\nBackground jobs tracking the DB\/message broker pick up the metadata and start handling the file (this is why it needs to be accessible by it in p.2) and notify the user\n\nMore specifically, in case of python\/django + aws you might use the following stack:\n\nLets assume you're using python + django\nYou can save the uploaded files in a private AWS S3 bucket\nSome meta might be saved in the db or use celery + AWS SQS or AWS SQS directly or bring up something like rabbitmq or redis(+pubsub)\nHave python code handling the job - depends on what your opt for in p.3. The only requirement is that it can pull data from your S3 bucket. After the job is done notify the user via AWS SES\n\nThe simplest single-server setup that doesn't require any intermediate components:\n\nYour python script that simply saves the file in a folder and gives it a name like someuser@yahoo.com-f9619ff-8b86-d011-b42d-00cf4fc964ff\nCron job looking for any files in this folder that would handle found files and notify the user. Notice if you need multiple background jobs running in parallel you'll need to slightly complicate the scheme to avoid race conditions (i.e. rename the file being processed so that only a single job would handle it) \n\nIn a prod app you'll likely need something in between depending on your needs","Q_Score":2,"Tags":"python,bash,concurrency,background-process","A_Id":49088871,"CreationDate":"2018-02-28T10:35:00.000","Title":"Concurrent file upload\/download and running background processes","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I've a Python program which just prints \"hello world\". I only want to get that output in a Java program and print that again, i.e. I want to consume output of Python program in a Java program. \nI tried using Runtime.getRuntime().exec(\"helloworld.py\"); but it is giving an exception saying java.lang.IOException : Cannot run program \"helloworld.py\" : CreateProcess error=193, %1 is not a valid Win32 application.\nCan anybody please explain why this exception has occurred and what is solution for it ?\nThanks in advance!","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":202,"Q_Id":49033297,"Users Score":0,"Answer":"Have you tried this,\nRuntime.getRuntime().exec(\"python helloworld.py\");\nPlease try and if it doesn't work leave a comment.","Q_Score":0,"Tags":"java,python,windows","A_Id":49046477,"CreationDate":"2018-02-28T15:39:00.000","Title":"Receive output of python program in java","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"An application A (out of my control) writes a file into a directory.\nAfter the file is written I want to back it up somewhere else with a python script of mine.\nQuestion: how may I be sure that the file is completed or that instead the application A is still writing the file so that I should wait until its completion? I am worried I could copy a partial file....\nI wanted to use this function shutil.copyfile(src,dst) but I don't know if it is safe or I should check the file to copy in some other way.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":245,"Q_Id":49054134,"Users Score":0,"Answer":"In general, you can't.\nBecause you don't have the information needed to solve the problem.\nIf you have to know that a file was completely transferred\/created\/written\/whatever successfully, the creator has to send you a signal somehow, because only the creator has that information.  From the receiving side, there's in general no way to infer that a file has been completely transferred.  You can try to guess, but that's all it is.  You can't in general tell a complete transfer from one where the connection was lost, for example.\nSo you need a signal of some sort from the sender.\nOne common way is to use a rename operation from something like filename.xfr to filename, or from an \"in work\" directory to the one you're watching.  Since most operating systems implement such rename operations atomically, if the sender only does the rename when the transfer is successfully done, you'll only process complete files that have been successfully transferred.\nAnother common signal is to send a \"done\" flag file, such as sending filename.done once filename has been successfully sent.\nSince you don't control the sender, you can't reliably solve this problem by watching for files.","Q_Score":1,"Tags":"python,file,copy","A_Id":49054587,"CreationDate":"2018-03-01T16:19:00.000","Title":"How to make sure a file is completed before copying it?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"In my understanding, dpctl dump-flows command only helps to view current state of flow table. Flow table gets flushed often. I want to record the flow table entries. \nWhich class do I need to look into to record flow table? I am using POX controller and mininet on Ubuntu installed in Virtual Box.","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":1682,"Q_Id":49054734,"Users Score":0,"Answer":"To log the flows which gets flushed, you can use OFPFF_SEND_FLOW_REM field available, which can be set by controller while setting up the flow action. According to openflow-specification:\nWhen a flow entry is removed, either by the controller or the flow expiry mechanism, the switch must check the flow entry\u2019s OFPFF_SEND_FLOW_REM\nflag. If this flag is set, the switch must send a flow removed message to the controller. Each flow removed message contains a complete description of the flow entry, the reason for removal (expiry or delete), the flow entry duration at the time of removal, and the flow statistics at the time of removal.\nI am not sure about the exact implementation in POX, but this when combined with ovs-ofctl dump-flows may be a good approach","Q_Score":2,"Tags":"python,sdn,mininet,openflow,pox","A_Id":50180831,"CreationDate":"2018-03-01T16:48:00.000","Title":"How to log all flow table entries periodically in mininet by Python code?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I've seen many threads about this, and have tried all options except for completely wiping Python off of my machine and re-downloading everything...\nI'm using a Windows 10, 64-bit machine, and had already downloaded Python2.7. Commands like 'C:\\>pip install seaborn' were not an issue.\nI recently downloaded Python3.6, and now my pip will not work - it returns the error in the title.\nI have added C:\\Python27, C:\\Python36, C:\\Python27\\Scripts, C:\\Python36\\Scripts to my Path, and still it won't work.\nIf I type in the command C:\\>python27 -m pip install seaborn, however, the pip works. I am really confused why I can no longer just type in pip install  and have it work.\nThanks in advance!","AnswerCount":4,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":15606,"Q_Id":49057888,"Users Score":0,"Answer":"This is how I solved this issue on my end: (short answer, remove this folder C:\\Python27)\nProblem: I installed python 3, after uninstalling python 2.7. The issue here is that pip remains behind even after you uninstall python 2.7.\nSolution:\n1. Uninstall python 3 (if you have it installed).\n2. Just in case, I would uninstall python 2.7.\n3. This is the key: go to C:\\Python27 ... and delete the entire directory (which also contains pip).\nThis solution is good for those that are fine with ONLY running Python 3 on their machines (which was my case).","Q_Score":2,"Tags":"python,python-3.x,python-2.7,pip,python-3.6","A_Id":54014883,"CreationDate":"2018-03-01T20:07:00.000","Title":"Pip error: Fatal error in launcher: Unable to create process using '\"'","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I've seen many threads about this, and have tried all options except for completely wiping Python off of my machine and re-downloading everything...\nI'm using a Windows 10, 64-bit machine, and had already downloaded Python2.7. Commands like 'C:\\>pip install seaborn' were not an issue.\nI recently downloaded Python3.6, and now my pip will not work - it returns the error in the title.\nI have added C:\\Python27, C:\\Python36, C:\\Python27\\Scripts, C:\\Python36\\Scripts to my Path, and still it won't work.\nIf I type in the command C:\\>python27 -m pip install seaborn, however, the pip works. I am really confused why I can no longer just type in pip install  and have it work.\nThanks in advance!","AnswerCount":4,"Available Count":2,"Score":0.0996679946,"is_accepted":false,"ViewCount":15606,"Q_Id":49057888,"Users Score":2,"Answer":"Okay so I finally worked it out...\nI uninstalled Python3.6 and deleted all relevant folders.\nI then went to Control Panel>Programs>Progams and Features and repaired my Python2.7 program. pip works now (I think it got messed up since I tried to rename the universal pip.exe file -> don't do that!!). \nAfter re-downloading Python3.6, I put my universal pip.exe download from Python3 in a different directory so the Path would not get it confused. I now have Paths for both pip2 and pip3 and all is okay.\nThanks for your help!","Q_Score":2,"Tags":"python,python-3.x,python-2.7,pip,python-3.6","A_Id":49059305,"CreationDate":"2018-03-01T20:07:00.000","Title":"Pip error: Fatal error in launcher: Unable to create process using '\"'","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"So I'm a new intern at a company and they gave me practically a blank computer. I needed to install some programs from their Git to run python and the only available python editors are Idle and Atom. I personally prefer atom, so I installed with the package \"script\" that should run python scripts. However I can't run python 3.4 and I get this error \n\" 'python' is not recognized as an internal or external command,\noperable program or batch file.\"\nWhich I get since on cmd typing 'python' does not launch the python only typing 'py'. Since I am an intern I have no control over the Environmental variables so I can't change py command to python. How can I change atom script package to use \"py\" command instead of \"python\".","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":246,"Q_Id":49067976,"Users Score":0,"Answer":"I solved it by going inscript 3.17.3 code:\nscript --> lib --> grammars --> python.coffee\nIn there I changed \"command: 'python'\" to \"command: 'py'\" for lines 3 and 7.\nThis should work for whatever command your windows batch uses to run python.","Q_Score":0,"Tags":"python-3.x,package,atom-editor","A_Id":49252287,"CreationDate":"2018-03-02T11:13:00.000","Title":"running Python commands on Atom","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm trying to install the mod_wsgi module in apache in my Ubuntu server but I need it to be specifically for version 2.7.13 in Python.For whatever reason every time I run sudo apt-get install  libapache2-mod-wsgi it installs the mod_wsgi module for Python 2.7.12.I'm doing all of this because I'm running into a weird python version issue.When I run one of my python Scripts in my server terminal it works perfectly with version 2.7.13.In Apache however the script doesn't work.I managed to figure out that my Apache is running version 2.7.12 and I think this is the issue.Still can't figure out how to change that apache python version yet though.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":623,"Q_Id":49074360,"Users Score":1,"Answer":"Eventually Figured it out.The problem was that I had 2 versions of Python 2.7 installed in my server(2.7.12 and 2.7.13) so the definitions of one were conflicting with the other.Solved it when I completely  removed Python 2.7.13 from the server.","Q_Score":0,"Tags":"python,ubuntu,server,mod-wsgi","A_Id":49112016,"CreationDate":"2018-03-02T17:30:00.000","Title":"How to install mod_wsgi to specific python version in Ubuntu?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I had python2 installed on my macOS and I parallel installed python3 (without homebrew). It worked perfect and I could use python3 and pip3 from every directory without problems parallel to python and pip for version 2.\nSome days ago I did not find pip3 and I had to set an alias to python3 -m ... (I thought I didn't use it before but I had!). Today in the morning I worked with python3 without problems and now python3 got a command not found but I cannot find it on my directories, too.\nWhere is my python3? And why it is gone?\nThe only reason I see is that I installed homebrew about a week ago for installing mutt. Is it possible that the brew upgrade function has destroyed paths or even installations?\nWould be great to get help from you!\nThanks a lot.","AnswerCount":3,"Available Count":2,"Score":0.0665680765,"is_accepted":false,"ViewCount":4348,"Q_Id":49085633,"Users Score":1,"Answer":"In case this helps, I had a similar problem where a homebrew upgrade made python3 seem to disappear.\nbrew install python3 \n...told me python3 was already installed and just needed to be linked with \nbrew link python\nRan it, and the symlinks it created seem to have resolved the issue.","Q_Score":10,"Tags":"python,python-3.x,macos,pip,homebrew","A_Id":60066221,"CreationDate":"2018-03-03T15:14:00.000","Title":"Python3 is suddenly gone (on macOS) - used it for at least a year","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I had python2 installed on my macOS and I parallel installed python3 (without homebrew). It worked perfect and I could use python3 and pip3 from every directory without problems parallel to python and pip for version 2.\nSome days ago I did not find pip3 and I had to set an alias to python3 -m ... (I thought I didn't use it before but I had!). Today in the morning I worked with python3 without problems and now python3 got a command not found but I cannot find it on my directories, too.\nWhere is my python3? And why it is gone?\nThe only reason I see is that I installed homebrew about a week ago for installing mutt. Is it possible that the brew upgrade function has destroyed paths or even installations?\nWould be great to get help from you!\nThanks a lot.","AnswerCount":3,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":4348,"Q_Id":49085633,"Users Score":5,"Answer":"Maybe someone else has the same problem. Therefore the steps for my solution:\n\nthe which command shows me the directories of the versions linked everywhere in the system\nthe argument --version gave me an overview of where I found the different versions of python and vim (for more informations about the directory-changes I checked vim, too)\nlooking at echo $PATH and ls -lha \/etc\/paths* I knew more about the current sequence of possible directories of installations and about changes (brew saved the original file as \/etc\/paths~orig)\nwith these informations I first upgraded with brew upgrade python3 (it seems that my installed libraries stayed like in the days before the mysterious loss of python3), then I could change the paths and add some alias to get the environment I want to work with\n\nNow everything seems to be like before the problems. If I will notice any further changes I now have the knowledge to solve them within some minutes. Good feeling!\nIt's not solved why brew downgraded the python3-installation because I'm sure not having installed it in the days of adding python3 to python2. But that isn't very important.\nThanks to the helpers - especially @avigil.","Q_Score":10,"Tags":"python,python-3.x,macos,pip,homebrew","A_Id":49093701,"CreationDate":"2018-03-03T15:14:00.000","Title":"Python3 is suddenly gone (on macOS) - used it for at least a year","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"as the title said, i'm looking for a way to send an AT command to a remote xbee and read the response.\nmy code is in python and i'm using digi-xbee library.\nanother question: my goal of using AT command is to get the node ID of that remote xbee device when this last one send me a message, i don't want to do a full scan of the network, i just want to get its node id and obviously the node id doens't come within the frame. so i had to send to it an AT command so he send me back its node ID. if you have any suggestions that may help, please tell me, i'm open to any helpful idea.\nPS. i tried to use read_device_info() within the callback function that launch when a data received but it didn't work. it works outside the function but inside no!\nthanks in advance","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":777,"Q_Id":49088925,"Users Score":0,"Answer":"There is a way to send a command to a remoted xbee: First, connect to the local XBee and then send a command to the local Xbee so the local Xbee can send a remote_command to the remoted XBee.\nHere are the details:\n\nCreate a bytearray of the command. For e.g: \n\nMy command is: 7E 00 10 17 01 00 13 A2 00 41 47 XX XX FF FE 02 50 32 05 C5, generated using XCTU. It is a remote AT command to set the pin DIO12 of the remoted XBee to digital out, high [5]. Create a raw bytearray of it.\n\nraw = bytearray([0x7E,0x00,0x10,0x17,0x01,0x00,0x13,0xA2,0x00,0x41,0x47,0xXX,0xXX,\n                     0xFF,0xFE,0x02,0x50,0x32,0x05,0xC5])\n\n\nCreate a packet: using from digi.xbee.packets.common import RemoteATCommandPacket\n\n\nATpacket = RemoteATCommandPacket.create_packet(raw, OperatingMode.API_MODE)\n\n\nSend the packet to the local XBee:\n\n\ndevice.send_packet(ATpacket)\n\nBonus: A more simple way to create a packet:\n\nATpacket = RemoteATCommandPacket(1,XBee16BitAddress.from_hex_string(\"0013A2004147XXXX\"),XBee16BitAddress.from_hex_string(\"FFFE\"),2,\"P2\",bytearray([0x05]))","Q_Score":0,"Tags":"python,xbee","A_Id":52888170,"CreationDate":"2018-03-03T20:31:00.000","Title":"how to send remote AT command to xbee device using python digi-xbee library","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"as the title said, i'm looking for a way to send an AT command to a remote xbee and read the response.\nmy code is in python and i'm using digi-xbee library.\nanother question: my goal of using AT command is to get the node ID of that remote xbee device when this last one send me a message, i don't want to do a full scan of the network, i just want to get its node id and obviously the node id doens't come within the frame. so i had to send to it an AT command so he send me back its node ID. if you have any suggestions that may help, please tell me, i'm open to any helpful idea.\nPS. i tried to use read_device_info() within the callback function that launch when a data received but it didn't work. it works outside the function but inside no!\nthanks in advance","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":777,"Q_Id":49088925,"Users Score":0,"Answer":"when you recive a message you get an xbee_message object, first you must define a data receive callback function and add it to device . In that message you call remote_device_get_64bit_addr().","Q_Score":0,"Tags":"python,xbee","A_Id":49214426,"CreationDate":"2018-03-03T20:31:00.000","Title":"how to send remote AT command to xbee device using python digi-xbee library","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I got started using AWS Glue for my data ETL. I've pulled in my data sources into my AWS data catalog, and am about to create a job for the data from one particular Postgres database I have for testing. I have read online that when authoring your own job, you can use a Zeppelin notebook. I haven't used Zeppelin at all, but have used Jupyter notebook heavily as I'm a python developer, and was using it a lot for data analytics, and machine learning self learnings. I haven't been able to find it anywhere online, so my question is this \"Is there a way to use Jupyter notebook in place of a Zeppelin notebook when authoring your own AWS Glue jobs?\"","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":4551,"Q_Id":49090954,"Users Score":1,"Answer":"I think it should be possible, if you can setup a Jupyter notebook locally, and enable SSH tunneling to the AWS Glue.  I do see some reference sites for setting up local Jupyter notebook, enable SSH tunneling, etc, though not AWS Glue specific.","Q_Score":3,"Tags":"python,jupyter,aws-glue","A_Id":49095523,"CreationDate":"2018-03-04T01:12:00.000","Title":"Is it possible to use Jupyter Notebook for AWS Glue instead of Zeppelin","Data Science and Machine Learning":0,"Database and SQL":1,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I want to learn Python. Based on my tutorial, I understand I need to install \"pip\", with the following line in terminal :\nsudo easy install pip\nBut I get \"command not found\"\nLooking quickly online, I understand it may have to do with my \"$PATH\" ?\nI don't know what it means, for for info my $PATH seems to be :\n\/usr\/local\/bin:\/usr\/bin:\/bin:\/usr\/sbin:\/sbin:\/usr\/local\/mysql\/bin\nWhat would I need to change (and how) to be able to install pip ?\nthanks very much in advance","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":1427,"Q_Id":49090986,"Users Score":1,"Answer":"Is it typo? Command should be sudo easy_install pip","Q_Score":0,"Tags":"python,pip","A_Id":49090992,"CreationDate":"2018-03-04T01:19:00.000","Title":"\"command not found\" when doing \u201csudo easy install pip\u201d\u200b","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"When I open IDLE it is version 3.4.0. I know that I have Python 2.7.6 installed on my system as well. How can I open the IDLE interface for this version?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":284,"Q_Id":49099537,"Users Score":1,"Answer":"If you can start python2.7 in a terminal, you should be able to run its version of IDLE by adding option -m idlelib.idle to the startup command.  Details depend on your system.\nIf you can start IDLE with an icon, you should be able to copy the icon and change the python version from 3.6 to 2.7 in the icon properties.  Again, detail depend on your system.","Q_Score":0,"Tags":"python,linux,python-idle","A_Id":49099794,"CreationDate":"2018-03-04T19:32:00.000","Title":"How do I open different version of IDLE (2.7.6)? linux","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"What is the recommended approach for installing Anaconda on Mac?\nI tried with brew cask install anaconda which after a while returns anaconda was successfully installed!.\nAfter that - trying conda command returns command not found: conda.\nIs there any post step installation that needs to be done?\nAnd what is recommended way to install Conda on MacOS?","AnswerCount":4,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":18606,"Q_Id":49118277,"Users Score":12,"Answer":"brew cask install anaconda\nexport PATH=\"\/usr\/local\/anaconda3\/bin:$PATH\"","Q_Score":11,"Tags":"python,macos,installation,conda","A_Id":60176143,"CreationDate":"2018-03-05T19:44:00.000","Title":"What is the best way to Install Conda on MacOS (Apple\/Mac)?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I recently updated my packages on a macOS High Sierra using brew update && brew upgrade in where now python and pip are symlinks to python3, pip3. From brew info python\n\nUnversioned symlinks python, python-config, pip etc. pointing to python3,\n  python3-config, pip3 etc., respectively, have been installed.\n\nI tend to install all my packages within my $HOME directory by using: pip install --user <package>, so my first instinct to reinstall the packages was to do a pip freeze to get the list of packages and then just try to install them using pip3 but after the upgrade I notice I don't have pip2 anymore.\nIs there a way without having to install python2, to list user instaled packages, something like pip freeze so that later I could just reinstall them using pip (now pip3)?, (I still have the $HOME\/Library\/Python\/2.7 directory with all its contents)","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":395,"Q_Id":49131554,"Users Score":0,"Answer":"You may have a folder \/usr\/local\/lib\/python2.7\/site-packages with your old packages... In such a case you can list the installed packages with ls","Q_Score":0,"Tags":"python,python-3.x,pip,homebrew","A_Id":49654021,"CreationDate":"2018-03-06T13:03:00.000","Title":"how to migrate all pip2 packages to pip3 not having anymore pip2","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am deploying a Python3 app to Google App Engine Flexible Environment. I have all my dependencies listed in the requirements.txt file.\nDuring deployment I received messages indicating the Google libraries have been deployed.\nBut, when the service is started it fails with\nfrom google.cloud import storage  ModuleNotFoundError: No module named 'google' \nThis runs fine locally.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":205,"Q_Id":49136190,"Users Score":0,"Answer":"I needed to include an additional file.\n.\/setup.cfg\n[install]\nprefix=","Q_Score":0,"Tags":"python,python-3.x,google-app-engine,importerror","A_Id":49155149,"CreationDate":"2018-03-06T16:58:00.000","Title":"Google App Engine Flexible Python service fails with \"ModuleNotFoundError: No module named 'google'\"","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"If App Engine service A and service B both depend on a datastore model, is there an effective way to share that model between both services without either duplicating the model or symlinking the file the model class definition is declared in?\nWould like to hear anyone's experience with this. Maybe storing the shared dependencies in Cloud Storage and pulling the relevant files from there?","AnswerCount":1,"Available Count":1,"Score":0.3799489623,"is_accepted":false,"ViewCount":42,"Q_Id":49136417,"Users Score":2,"Answer":"Not really an answer, just some considerations.\nI see a few difficulties to consider if using GCS for storing the shared models:\n\nimporting the models in your app code would be a bit more complex, you'll need to use GCS libraries to read the file(s) for dynamic importing as they would not be available in the local filesystem. As a side effect of the dynamic importing you may loose some development capabilities in your IDE (like auto-completion, object structure verifications, etc) Preserving them might be possible, but probably not trivial.\nsplitting the model definitions across model files (for partial reuse, inheritance and\/or inter-model references for example) would not be a simple task. The point above would need to be addressed in the model files as well, in addition to the application code.\ndeploying the app code on GAE and the models on GCP will always be non-atomic, extra care for coordinating the deployments and probably backward\/forward compatibility would be needed to minimize\/eliminate transient failures.\n\nIMHO the symlinks would be a simpler approach.","Q_Score":3,"Tags":"python,google-app-engine,google-cloud-datastore","A_Id":49137161,"CreationDate":"2018-03-06T17:11:00.000","Title":"Reuse datastore models across services without symlink","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"PyCharm CE and Anaconda have been installed.\nI know I should create a symlink to $HOME\/.anaconda,\nbut what is the command on macOS\/Linux?\nOr any other solution?\nThx","AnswerCount":3,"Available Count":1,"Score":-0.0665680765,"is_accepted":false,"ViewCount":5981,"Q_Id":49143803,"Users Score":-1,"Answer":"Add the path in ~\/.bashrc\nsuch as\nexport PATH=\"\/anaconda3\/bin:$PATH\"\nThen, PyCharm CE can be worked with Anaconda.","Q_Score":1,"Tags":"python,macos,path,pycharm,anaconda","A_Id":49167249,"CreationDate":"2018-03-07T03:50:00.000","Title":"PyCharm: Anaconda installation is not found on macOS","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have set up a windows server on AWS and have set it up to run python. I'm trying to get this to run on a regular basis but I'm not sure is schtasks will work to run the python code. Could you give some advice around this please.\nAlso, the reason I didn't set this up on a native python friendly OS is because I was having some issues installing the libraries I needed.\nAny help or advice is hugely appreciated.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":325,"Q_Id":49156297,"Users Score":0,"Answer":"'schtasks' is just an executable. You can always launch that within python script, using subprocess for example. You need to keep in mind for the following though:\n\nIt could require elevation. If your script is within ordinary process, you could get UAC prompt, and will need a way to deal with it.\nIf you'd like to create a task running without user logging on, you need to manage user\/password.\nIf you create a bunch of tasks, you need to manage them, query\/pause\/stop\/delete???\n\nThat's all I can think of right now...","Q_Score":0,"Tags":"python,amazon-ec2,windows-task-scheduler","A_Id":49156596,"CreationDate":"2018-03-07T16:02:00.000","Title":"Is it Possible to use schtasks on Python Code?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm writing a python script which copies files from a server, performs a few operations on them, and delete the files locally after processing.\nThe script is not supposed to modify the files on the server in any way.\nHowever, since bugs may occur, I would like to make sure that I'm not modifying\\deleting the original server files.\nIs there a way to prevent a python script from having writing permissions to a specific folder? I work on Windows OS.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":38,"Q_Id":49170157,"Users Score":0,"Answer":"That is unrelated to Python, but to the filesystem security provided by the OS. The key is that permissions are not given to programs but to the user under which they run.\nWindows provides the command runas that allows to run a command (whatever the language is uses) under a different user. There is even a \/savecred option that allows not to provide the password on each activation but instead save in in the current user's profile.\nSo if you setup a dedicated user to run the scrip, give it only read permissions on the server folder and run the scrip under that user, then even a bug in the script could not tamper that folder.\nBTW, if the script is runned as a scheduled task, you can directly say what user should be used and give its password at config time.","Q_Score":0,"Tags":"python","A_Id":49170817,"CreationDate":"2018-03-08T09:53:00.000","Title":"Making sure that a script does not modify files in specific folder","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to set up a cronjob that executes a python (3.6) script every day at a given time that connects to an oracle 12g database with a 32 bit client (utilizing the cx_Oracle and sqlalchemy libs). The code itself was developed on a win64 bit machine.\nHowever, when trying to deploy the script onto an Ubuntu 16.04 server, I run into a dilemma when it comes to 32 vs 64 bit architectures.\n\nThe server is based on a 64 bit architecture\nThe oracle db is accessible via a 32 bit client\nmy current python version on ubuntu is based on 64 bit and I spent about an hour of how to get a 32 bit version running on a 64 bit linux machine without much success. \n\nThe error I receive at this moment when trying to run the python script refers to the absence of an oracle client (DPI-1047). However, I already encountered a similar problem in windows when it was necessary to switch the python version to the 32 bit version and to install a 32 bit oracle client.\nIs this also necessary in the ubuntu case or are there similar measurements needed to be taken? and if so, how do I get ubuntu to install and run python3.6 in 32 bit as well as the oracle client in 32 bit?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":698,"Q_Id":49171782,"Users Score":4,"Answer":"I am a bit confused about your question but this should give some clarification:\n\nA 32-bit client can connect to a 64-bit Oracle database server - and vice versa\nYou can install and run 32-bit applications on a 64-bit machine - this is at least valid for Windows, I don't know how it works on Linux.\nYour application (the python in your case) must have the same \"bitness\" as installed Oracle Client.","Q_Score":0,"Tags":"python,oracle,ubuntu,32bit-64bit,cx-oracle","A_Id":49172856,"CreationDate":"2018-03-08T11:15:00.000","Title":"Running a Python Script in 32 Bit on 64 linux machine to connect to oracle DB with 32 bit client","Data Science and Machine Learning":0,"Database and SQL":1,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"When I run python -m venv, the virtual environment directory that venv creates includes a binary named python and another named python3 which is just a link to python. (In my installation, python is Python 3.6 and python2 is Python 2.7.)\nMy problem is, sometimes (and I can't understand what's the difference between subsequent invocations) it also creates another symlink python3.6 pointing to python, but sometimes it doesn't. I need this symlink (actually, tox needs it). The binaries pip3.6 and easy_install-3.6 are always installed in the virtualenv.\nIs there any way I can make sure that python -m venv creates a symlink python3.6?\n(Disclaimer: I'm using pyenv to manage my Python installation, but I can reproduce the behavior above using \/usr\/bin\/python -m venv)","AnswerCount":2,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":2203,"Q_Id":49177214,"Users Score":1,"Answer":"You need to have the binary already available to get venv to use it, but if you have it, it shouldn't matter if you use python2 -m venv or python3 -m venv. If you want 3.6, try:\npython -m venv python=`which python3.6` ~\/envs\/py36","Q_Score":3,"Tags":"python,linux,python-3.x,python-venv,virtual-environment","A_Id":63673178,"CreationDate":"2018-03-08T15:51:00.000","Title":"How can I make venv install a python3.6 binary?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm learning scrapy from a udemy tutorial. \nI've installed Scrapy to the following path:\n\nc:\\Users\\User\\Anaconda3\\Scripts\n\nafterwards I enter in the \"startproject\" command which creates the project \"quotes spider\" in a new folder with this path:\n\nc:\\Users\\User\\Anaconda3\\Scripts\\quotes_spider\n\nin the tutorial, the instructor changes his directory to that subfolder and is able to call scrapy from that subfolder.  \nWhen I try to do that i get the error:\n\n'scrapy' is not recognized as an internal or external command,\n  operable program or batch file.\n\nHow am I able to call scrapy from this subfolder??","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":62,"Q_Id":49199748,"Users Score":0,"Answer":"You will either need to add the path to where scrapy is located to your Path Environment Variable (if you're on Windows) or you could run it from your c:\\Users\\User\\Anaconda3\\Scripts and run the scrapy command with relative paths to your quotes_spider subfolder.","Q_Score":0,"Tags":"python-3.x,scrapy","A_Id":49200138,"CreationDate":"2018-03-09T18:11:00.000","Title":"run python in sub folder created after \"startproject\" command","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I'm having issues with link-time and compile-time ssl backend errors when trying to import pycurl into a python script.  This script ran fine on OSX, however not on my current setup.  I am running Ubuntu 16.04LTS on VirtualBox, Host OS Win10, Python 2.7.12, using pycurl-7.43.0.1.  The error I receive is ImportError: pycurl: libcurl link-time ssl backend (openssl) is different from compile-time ssl backend (nss).  I've tried uninstalling and then executing export PYCURL_SSL_LIBRARY=openssl before reinstalling again with no success.  Any help is appreciated, let me know if any more information is needed.","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":651,"Q_Id":49200056,"Users Score":0,"Answer":"sudo yum install openssl-devel for Red Hat and CentOS, etc.","Q_Score":0,"Tags":"python,ubuntu,ssl,virtualbox,pycurl","A_Id":59869746,"CreationDate":"2018-03-09T18:31:00.000","Title":"Pycurl Import Error: SSL Backend Mismatch","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm having issues with link-time and compile-time ssl backend errors when trying to import pycurl into a python script.  This script ran fine on OSX, however not on my current setup.  I am running Ubuntu 16.04LTS on VirtualBox, Host OS Win10, Python 2.7.12, using pycurl-7.43.0.1.  The error I receive is ImportError: pycurl: libcurl link-time ssl backend (openssl) is different from compile-time ssl backend (nss).  I've tried uninstalling and then executing export PYCURL_SSL_LIBRARY=openssl before reinstalling again with no success.  Any help is appreciated, let me know if any more information is needed.","AnswerCount":2,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":651,"Q_Id":49200056,"Users Score":1,"Answer":"Was missing dependencies remedied through sudo apt-get install libssl-dev","Q_Score":0,"Tags":"python,ubuntu,ssl,virtualbox,pycurl","A_Id":49224400,"CreationDate":"2018-03-09T18:31:00.000","Title":"Pycurl Import Error: SSL Backend Mismatch","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a docker volume that I created by running volume create my_volume and have been running my docker image with the command docker run -v my_volume:\/Volumes\/docker-volume\/ my_image.  Within the docker-volume directory I have a python file that I would like to import, but I can't figure out how to do so.  Everything I've tried results in a ModuleNotFound error.  It feels like there's some fundamental issue, perhaps relating to how a docker image interacts with a volume, that I'm missing.  Any help would be greatly appreciated!","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":700,"Q_Id":49201628,"Users Score":0,"Answer":"It looks like there is an issue with your volume mapping.\nThe volume mapping syntax is of format \"-v {local volume}:{directory inside container}\nSo you would have to create that particular directory in your image before mapping it.","Q_Score":1,"Tags":"docker,python-import,docker-volume","A_Id":49201697,"CreationDate":"2018-03-09T20:25:00.000","Title":"import python file from docker volume","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am new to Python and recently installed Python 3.6 on Windows 10. When I try to open IDLE, Python's IDE, I keep getting a message saying that it can not establish a subprocess. I have tried uninstalling and installing several times. I have seen several forums which say that there could be a .py file that is in the directory that is messing up IDLE. This is not my case, as I have not even been able to start using Python and I do not have a firewall either. Can someone tell me how I can get IDLE to work?","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":1726,"Q_Id":49203567,"Users Score":0,"Answer":"I work with over 30 Python developers and without fail when this happens they were behind a proxy \/ vpn. Turn off your proxy \/ vpn and it will work. Must have had this happen hundreds of times and this solution always worked.","Q_Score":0,"Tags":"python,windows,python-idle","A_Id":56514353,"CreationDate":"2018-03-09T23:15:00.000","Title":"Windows 10: IDLE can't establish a subprocess","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a Python file in \/Users\/homedir\/... and I want it to access a csv file on an external hard drive.\nDoes anyone know how to do this?  I only need reading permission.","AnswerCount":2,"Available Count":1,"Score":1.0,"is_accepted":false,"ViewCount":7016,"Q_Id":49214989,"Users Score":8,"Answer":"External drives can be found under \/Volumes on macOS. If you provide the full path and have read access you should be able to read in your csv.","Q_Score":6,"Tags":"python,macos,io","A_Id":49215074,"CreationDate":"2018-03-10T23:14:00.000","Title":"Access file in external hard drive using python on mac","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I've got a few Docker-based projects that all depend on each other:\n\nproject 1 depends on python:3-alpine\nproject 2 depends on project 1\nproject 3 depends on project 1\n\netc. etc.\nAs such, all of my automated builds are linked as above.  When I update project 2, projects 3 4 5 are all automatically rebuilt.  It's a pretty slick feature.\nThe thing is, this means that whenever a lower-level project is updated, this triggers lots of rebuilds of lots of projects.  In the case of something very low-level being updated, like python or node, I can imagine that Docker Hub is triggering a lot of rebuilds.\nMy question then is: doesn't this put a lot of load on package hosts like PyPI?  As each of my projects include a line something like:\nRUN pip install -r requirements.txt\nThis hits PyPI to pull down all of the requirements, re-downloading each time without the ability to use a local cache because the Docker container is \"brand new\" for each build.\nIs there something I can do to lessen the impact my projects are making, or is this somehow fixed with \"magic\" on Docker Hub?  In the absence of such magic, is there a Best Practise I should be following?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":23,"Q_Id":49221084,"Users Score":0,"Answer":"After a successful build save cache directories somewhere outside docker in persistent storage. Restore the cache in every new container.","Q_Score":0,"Tags":"python,docker,dockerfile,pypi,dockerhub","A_Id":49221219,"CreationDate":"2018-03-11T14:28:00.000","Title":"Does Docker Hub put a big strain on package hosts?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm starting with Python 3, using Raspbian (from Debian), and using virtualenv.  I understand how to create\/use a virtualenv to \"sandbox\" different Python project, HOWEVER I'm a bit unclear on whether one should be setting up a different linux user for each project (assuming that the project\/virtualenv will be used to create & then run a daemon process on the linux box).  \nSo when creating separate python environments the question I think is should I be:\n\ncreating a new linux user account for each deamon\/acript I'm working on, so that both the python virtual environment, and the python project code area can live under directories owned by this user?\nperhaps just create one new non-administrator account at the beginning, and then just use this account for each project\/virtual environmnet\ncreate everything under the initial admin user I first log with for raspbian (e.g. \"pi\" user) - Assume NO for this option, but putting it in for completeness.","AnswerCount":3,"Available Count":3,"Score":1.2,"is_accepted":true,"ViewCount":124,"Q_Id":49228214,"Users Score":4,"Answer":"TL;DR:  1. no 2. yes 3. no\n\n\ncreating a new linux user account for each deamon\/script I'm working on, so that both the python virtual environment, and the python project code area can live under directories owned by this user?\n\n\nNo. Unnecessary complexity and no real benefit to create many user accounts for this. Note that one user can be logged in multiple sessions and running multiple processes.\n\n\nperhaps just create one new non-administrator account at the beginning, and then just use this account for each project\/virtual environment\n\n\nYes, and use sudo from the non-admin account if\/when you need to escalate privilege.\n\n\ncreate everything under the initial admin user I first log with for raspbian (e.g. \"pi\" user) - Assume NO for this option, but putting it in for completeness.\n\n\nNo.  Better to create a regular user, not run everything as root.  Using a non-root administrator account would be OK, though.","Q_Score":2,"Tags":"python,linux,python-3.x,virtualenv,virtualenvwrapper","A_Id":49228268,"CreationDate":"2018-03-12T04:33:00.000","Title":"should new python virtualenv's be created with new linux user accounts?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm starting with Python 3, using Raspbian (from Debian), and using virtualenv.  I understand how to create\/use a virtualenv to \"sandbox\" different Python project, HOWEVER I'm a bit unclear on whether one should be setting up a different linux user for each project (assuming that the project\/virtualenv will be used to create & then run a daemon process on the linux box).  \nSo when creating separate python environments the question I think is should I be:\n\ncreating a new linux user account for each deamon\/acript I'm working on, so that both the python virtual environment, and the python project code area can live under directories owned by this user?\nperhaps just create one new non-administrator account at the beginning, and then just use this account for each project\/virtual environmnet\ncreate everything under the initial admin user I first log with for raspbian (e.g. \"pi\" user) - Assume NO for this option, but putting it in for completeness.","AnswerCount":3,"Available Count":3,"Score":0.0665680765,"is_accepted":false,"ViewCount":124,"Q_Id":49228214,"Users Score":1,"Answer":"In the general case, there is no need to create a separate account just for a virtualenv.\nThere can be reasons to create a separate account, but they are distinct from, and to some extent anathema to, virtual environments. (If you have a dedicated account for a service, there is no need really to put it in a virtualenv -- you might want to if it has dependencies you want to be able to upgrade easily etc, but the account already provides a level of isolation similar to what a virtualenv provides within an account.)\nReasons to use a virtual environment:\n\nMake it easy to run things with different requirements under the same account.\nMake it easy to install things for yourself without any privileges.\n\nReasons to use a separate account:\n\nFine-grained access control to privileged resources.\nProperly isolating the private resources of the account.","Q_Score":2,"Tags":"python,linux,python-3.x,virtualenv,virtualenvwrapper","A_Id":49228732,"CreationDate":"2018-03-12T04:33:00.000","Title":"should new python virtualenv's be created with new linux user accounts?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm starting with Python 3, using Raspbian (from Debian), and using virtualenv.  I understand how to create\/use a virtualenv to \"sandbox\" different Python project, HOWEVER I'm a bit unclear on whether one should be setting up a different linux user for each project (assuming that the project\/virtualenv will be used to create & then run a daemon process on the linux box).  \nSo when creating separate python environments the question I think is should I be:\n\ncreating a new linux user account for each deamon\/acript I'm working on, so that both the python virtual environment, and the python project code area can live under directories owned by this user?\nperhaps just create one new non-administrator account at the beginning, and then just use this account for each project\/virtual environmnet\ncreate everything under the initial admin user I first log with for raspbian (e.g. \"pi\" user) - Assume NO for this option, but putting it in for completeness.","AnswerCount":3,"Available Count":3,"Score":0.1325487884,"is_accepted":false,"ViewCount":124,"Q_Id":49228214,"Users Score":2,"Answer":"It depends on what you're trying to achieve. From virtualenv's perspective you could do any of those.\n#1 makes sense to me if you have multiple services that are publicly accessible and want to isolate them.\nIf you're running trusted code on an internal network, but don't want the dependencies clashing then #2 sounds reasonable.\nGiven that the Pi is often used for a specific purpose (not a general purpose desktop say) and the default account goes largely unused, using that account would be fine. Make sure to change the default password.","Q_Score":2,"Tags":"python,linux,python-3.x,virtualenv,virtualenvwrapper","A_Id":49228490,"CreationDate":"2018-03-12T04:33:00.000","Title":"should new python virtualenv's be created with new linux user accounts?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm running a python flask application on uswgi with 4 workers.\nThe application has a cache that needs to be periodically refreshed and warmed up. I'd like to do this with an external job that hits a url but I need to ensure the cache is warmed up on all 4 workers.\nIs there a way to route a request to a particular worker? Ideally I'd just like to have a special header or query parameter that does this.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":899,"Q_Id":49231130,"Users Score":0,"Answer":"Worker load balancing is handled by the kernel and there's no way to force requests to hit a specific worker.\nYou'll have to either move your cache to somewhere all workers can access (redis, mongo, sql db, etc) or have a process\/thread running on your workers to refresh the cache (Celery, etc)","Q_Score":7,"Tags":"python,flask,uwsgi","A_Id":57765810,"CreationDate":"2018-03-12T08:44:00.000","Title":"Routing a request to a particular uwsgi worker","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I want to create a BLE Connection between my Laptop (Windows 10) and a BLE Device which will be the Master.\nI installed Bluez and I can detect Bluetooth devices like my Smartphone but no device that only supports BLE. I want to download gattlib with pip install gattlib but I got an OSError: Not supported OS which brings me to the conclusion that I can't do it this way on Windows 10. Is there any other possibility than installing Linux on my Laptop?","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":3830,"Q_Id":49238744,"Users Score":0,"Answer":"As far as I know, gattlib is designed for linux and debian system so you can use another one. Another side, if you are using a Python version greater than 3.9, you can directly Bluetooth RFCOMM Support for Windows 10.","Q_Score":18,"Tags":"python,windows-10,bluetooth-lowenergy","A_Id":69203279,"CreationDate":"2018-03-12T15:21:00.000","Title":"Python using gattlib for BLE Scanning on Windows 10","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am playing around with scapy (module for Python). I want to build packages and send them across my local network from one host to another. When I buil my package like that, I do not receive anything on my destination host:\npacket = Ether() \/ IP(dst='192.168.0.6') \/ TCP(dport=8000) => sendp(packet).\nHowever, when I build it like that it works: packet = IP(dst='192.168.0.6') \/ TCP(dport=8000), send(packet).\nI capture the packages on my destination host with the help of wireshark.\nWhy doesn't the Ethernet-Variant work? I have all my PCs connected with ethernet cables...\nThanks for help!","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":404,"Q_Id":49243269,"Users Score":1,"Answer":"send() uses Scapy's routing table (which is copied from the host's routing table when Scapy is started), while sendp() uses the provided interface, or conf.iface when no value is specified.\nSo you should either set conf.iface = [iface] ([iface] being the interface you want to use), or specify sendp([...], iface=[iface]).","Q_Score":1,"Tags":"python,wireshark,scapy","A_Id":49250191,"CreationDate":"2018-03-12T19:41:00.000","Title":"Can't send ethernet packages across my LAN","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I tried to install MATLAB R2017b runtime Python 3.6 on to my ubuntu 16.4. As per the instruction that given in matlab community python installer (setup.py) should be in ..\/..\/v93\/extern\/engines\/python location. \nWhen I go there Icouldnt see that setup.py file in the location. I have tried so many time  re installing the MATLAB R2017b runtime. \nBut I couldn't find that python setup.py on the location. \ncould you please send me instruction how to install this MATLAB R2017b runtime on ubuntu 16.4 where I can access my matlab libries from python3.6","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":88,"Q_Id":49270176,"Users Score":1,"Answer":"The python installer should be in \/{matlab_root}\/extern\/engines\/python.\nThen python setup.py install\nHope it helps","Q_Score":1,"Tags":"python,matlab,computer-vision,ubuntu-16.04","A_Id":49274707,"CreationDate":"2018-03-14T05:14:00.000","Title":"In Matlab Runtime Python3.6 installer not found in order to install matlab python suport for ubunut 16.4","Data Science and Machine Learning":1,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Is it possible to transfer virtual environment data from a local host to a docker image via the ADD command? \nRather than doing pip installs inside the container, I would rather the user have all of that done locally and simply transfer the virtual environment into the container. Granted all of the files are the same name locally as in the docker container, along with all directories being nested properly. \nThis would save minutes to hours if it was possible to transfer virtual environment settings into a docker image. Maybe I am thinking about this in the wrong abstract. \nIt just feels very inefficient doing pip installs via a requirements.txt that was passed into the container, as opposed to doing it all locally, otherwise each time the image is started up it has to re-install the same dependencies that have not changed from each image's build.","AnswerCount":2,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":5080,"Q_Id":49287441,"Users Score":2,"Answer":"While possible, it's not recommended.\n\nDependencies (library versions, globally installed packages) can be different on host machine and container.\nImage builds will not be 100% reproducible on other hosts.\nImpact of pip install is not big. Each RUN command creates it's own layer, which are cached locally and also in repository, so pip install will be re-run only when requirements.txt is changed (or previous layers are rebuilt).\n\nTo trigger pip install only on requirements.txt changes, Dockerfile should start this way:\n...\nCOPY requirements.txt .\/\nRUN pip install -r requirements.txt\nCOPY src\/ .\/\n...\n\nAlso, it will be run only on image build, not container startup.\nIf you have multiple containers with same dependencies, you can build intermediate image with all the dependencies and build other images FROM it.","Q_Score":7,"Tags":"python,docker,pip,virtualenv,dockerfile","A_Id":49287543,"CreationDate":"2018-03-14T20:53:00.000","Title":"Transfer virtualenv to docker image","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I feel like this is incredibly easy to fix, but for some reason it isn't. \nI want to run a program in linux that opens python file filename.py by writing:\n\npython3 filename arg\n\nbut it only works if i write:\n\npython3 filename.py arg\n\nIs there an easy way to run it without adding the extension? And without removing the extension completely? I wouldn't have imagined this to be a problem at all, but here we are. \nThankful for help!","AnswerCount":2,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":125,"Q_Id":49301514,"Users Score":1,"Answer":"Your file is called filename.py, therefore you call it with python3 filename.py. If you want to call it with python3 filename, you'll need to rename the file.\nThe one thing you can do is call Python with the -m switch, which will try to import a module with that name, i.e. python3 -m filename. That should work without renaming the file.","Q_Score":0,"Tags":"python,terminal,file-extension","A_Id":49301592,"CreationDate":"2018-03-15T14:02:00.000","Title":"Running python in terminal without suffix","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I upgraded bokeh library by executing the following command: \n!pip install --user --upgrade bokeh \nTornado version 5 dependency was installed. After upgrading the library from the DSX Notebook the kernel stops responding after restart. I see \"Slow Kernel connection\" dialog.\nOpening another notebook for the same language displays the same error dialog.","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":449,"Q_Id":49303168,"Users Score":2,"Answer":"Tornado 5.0 is incompatible with the current ipython kernel installation for DSX Notebooks. \nIf you are experiencing \"Slow kernel connection\" issue after upgrading Bokeh library try the following steps:\n\nSwitch to Python kernel with another version (e.g. if you installed Tornado 5 for \"Python 2\" kernel, switch kernel to \"Python 3.5\")\nExecute the following command in the notebook code cell: !rm -rf ~\/.local\/lib\/\nThis command will remove all python packages installed by user\nAll Python kernels should be started normally\n\nIf Tornado 5 was installed for both Python versions (Python 2 and Python 3) you could remove user's packages by switching to R kernel and executing the following command:\nsystem('!rm -rf ~\/.local\/lib\/')\nAfter that you could switch back to Python kernel.\nYou could upgrade bokeh library with the following command: \n!pip install --upgrade --upgrade-strategy only-if-needed bokeh\nIn this case Tornado package will not be updated","Q_Score":0,"Tags":"python,jupyter-notebook,tornado,bokeh,data-science-experience","A_Id":49303169,"CreationDate":"2018-03-15T15:17:00.000","Title":"Installing \"bokeh\" library upgrades Tornado to the version 5 that causes an issue with starting Python kernel in DSX Notebook","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am new to spark. I am trying to read a file from my master instance but I am getting this error. After research I found out either you need to load data to hdfs or copy across clusters. I am unable to find the commands for doing either of these. \n\n--------------------------------------------------------------------------- Py4JJavaError                             Traceback (most recent call\n  last)  in ()\n  ----> 1 ncols = rdd.first().features.size  # number of columns (no class) of the dataset\n\/home\/ec2-user\/spark\/python\/pyspark\/rdd.pyc in first(self)    1359\n  ValueError: RDD is empty    1360         \"\"\"\n  -> 1361         rs = self.take(1)    1362         if rs:    1363             return rs[0]\n\/home\/ec2-user\/spark\/python\/pyspark\/rdd.pyc in take(self, num)    1311\n  \"\"\"    1312         items = []\n  -> 1313         totalParts = self.getNumPartitions()    1314         partsScanned = 0    1315 \n\/home\/ec2-user\/spark\/python\/pyspark\/rdd.pyc in getNumPartitions(self) \n  2438     2439     def getNumPartitions(self):\n  -> 2440         return self._prev_jrdd.partitions().size()    2441     2442     @property\n\/home\/ec2-user\/spark\/python\/lib\/py4j-0.10.4-src.zip\/py4j\/java_gateway.py\n  in call(self, *args)    1131         answer =\n  self.gateway_client.send_command(command)    1132         return_value\n  = get_return_value(\n  -> 1133             answer, self.gateway_client, self.target_id, self.name)    1134     1135         for temp_arg in temp_args:\n\/home\/ec2-user\/spark\/python\/pyspark\/sql\/utils.pyc in deco(*a, **kw)\n       61     def deco(*a, **kw):\n       62         try:\n  ---> 63             return f(*a, **kw)\n       64         except py4j.protocol.Py4JJavaError as e:\n       65             s = e.java_exception.toString()\n\/home\/ec2-user\/spark\/python\/lib\/py4j-0.10.4-src.zip\/py4j\/protocol.py\n  in get_return_value(answer, gateway_client, target_id, name)\n      317                 raise Py4JJavaError(\n      318                     \"An error occurred while calling {0}{1}{2}.\\n\".\n  --> 319                     format(target_id, \".\", name), value)\n      320             else:\n      321                 raise Py4JError(\nPy4JJavaError: An error occurred while calling o122.partitions. :\n  org.apache.hadoop.mapred.InvalidInputException: Input path does not\n  exist: file:\/home\/ec2-user\/PR_DATA_35.csv     at\n  org.apache.hadoop.mapred.FileInputFormat.singleThreadedListStatus(FileInputFormat.java:285)\n    at\n  org.apache.hadoop.mapred.FileInputFormat.listStatus(FileInputFormat.java:228)\n    at\n  org.apache.hadoop.mapred.FileInputFormat.getSplits(FileInputFormat.java:313)\n    at org.apache.spark.rdd.HadoopRDD.getPartitions(HadoopRDD.scala:194)\n    at\n  org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:252)\n    at\n  org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:250)\n    at scala.Option.getOrElse(Option.scala:121)     at\n  org.apache.spark.rdd.RDD.partitions(RDD.scala:250)    at\n  org.apache.spark.rdd.MapPartitionsRDD.getPartitions(MapPartitionsRDD.scala:35)\n    at\n  org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:252)\n    at\n  org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:250)\n    at scala.Option.getOrElse(Option.scala:121)     at\n  org.apache.spark.rdd.RDD.partitions(RDD.scala:250)    at\n  org.apache.spark.api.java.JavaRDDLike$class.partitions(JavaRDDLike.scala:61)\n    at\n  org.apache.spark.api.java.AbstractJavaRDDLike.partitions(JavaRDDLike.scala:45)\n    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)  at\n  sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)\n    at\n  sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)\n    at java.lang.reflect.Method.invoke(Method.java:498)     at\n  py4j.reflection.MethodInvoker.invoke(MethodInvoker.java:244)  at\n  py4j.reflection.ReflectionEngine.invoke(ReflectionEngine.java:357)    at\n  py4j.Gateway.invoke(Gateway.java:280)     at\n  py4j.commands.AbstractCommand.invokeMethod(AbstractCommand.java:132)\n    at py4j.commands.CallCommand.execute(CallCommand.java:79)   at\n  py4j.GatewayConnection.run(GatewayConnection.java:214)    at\n  java.lang.Thread.run(Thread.java:748)","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":96,"Q_Id":49311592,"Users Score":0,"Answer":"Since you are in AWS already, it may be easier to just store your data files in s3, and open them directly from there.","Q_Score":0,"Tags":"python,apache-spark,amazon-ec2,pyspark","A_Id":49311725,"CreationDate":"2018-03-16T00:51:00.000","Title":"How to add your files across cluster on pyspark AWS","Data Science and Machine Learning":1,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am really new to Google API key.\nWhen am I testing my code on the local system, it is working fine but on an actual server it giving me SSLHandshakeError.\nServer configuration: nginx + unicorn + ubuntu + django + Python 2.7\nSSLHandshakeError at 'url'\n[Errno 1] _ssl.c:510: error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":96,"Q_Id":49313123,"Users Score":0,"Answer":"I just found the solution for my question, the error was coming due to package httplib2.\nI have just updated requests and httplib2.\npip install -U httplib2\npip install -U requests[security]","Q_Score":0,"Tags":"python,django,google-api","A_Id":49332855,"CreationDate":"2018-03-16T04:14:00.000","Title":"Google API key not working on server but working fine on local server","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I'm wondering if there's a way how to share context between individual:\n\nthreads\ninstances\n\non Google App Engine. I assume memcache would do the job, but in my case the context is just a single integer and memcache sounds like an overkill.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":58,"Q_Id":49324572,"Users Score":4,"Answer":"Assuming your application is running on GAE Standard:\n\nIn theory there may be ways to share state between threads that run on the same instance. In Python, this could take the form of a module level variable. This might make sense for extremely specialized types of caching, but it isn't reliable or durable because instances come and go over time. It also introduces the idea of cold and warm instances, which will make performance metrics harder to interpret.\nThere is not a way to share state between instances without using another system like Memcache or Datastore. It may seem like overkill for a small dataset, but those tools are probably what you're looking for.","Q_Score":1,"Tags":"python,google-app-engine","A_Id":49327295,"CreationDate":"2018-03-16T15:38:00.000","Title":"GAE: How to share context between threads and\/or instances","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I get an error when I execute python2 -m pip freeze this command. \nThe error message is as below:\n\/usr\/bin\/python: cannot import name HashMissing; 'pip' is a package and cannot be directly executed\nI had used apt-get remove --purge python python-pip fo removing the python2. \nThen, I do these path checking for knowing pip and python command path.  \n\n    john@mymachine:~$ whereis python\n    python: \/usr\/bin\/python \/usr\/bin\/python3.4m \/usr\/bin\/python3.4 \/usr\/bin\/python2.7 \/usr\/bin\/python2.7-config \/usr\/lib\/python3.4     \/usr\/lib\/python2.7 \/etc\/python3.4 \/etc\/python2.7 \/usr\/local\/lib\/python3.4 \/usr\/local\/lib\/python2.7 \/usr\/include\/python2.7 \/usr\/share\/python \/usr\/share\/man\/man1\/python.1.gz\n    john@mymachine:~$ which -a pip\n    \/usr\/local\/bin\/pip\n    jonh@mymachine:~$ whereis pip\n    pip: \/usr\/local\/bin\/pip \/usr\/local\/bin\/pip3.5 \/usr\/local\/bin\/pip2.7 \/usr\/local\/bin\/pip3.4\n    john@mymachine:~$ which -a python\n    \/usr\/bin\/python\n\nWish some help.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":202,"Q_Id":49335903,"Users Score":0,"Answer":"Don't know the reason. But, I install the pip again.\nwget https:\/\/bootstrap.pypa.io\/get-pip.py\nand\npython get-pip.py\nThe problem is resolved.","Q_Score":0,"Tags":"python,pip","A_Id":49356101,"CreationDate":"2018-03-17T12:17:00.000","Title":"python2 -m pip freeze showing an error","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a python code which is quite heavy, my computer cant run it efficiently, therefore i want to run the python code on cloud.\nPlease tell me how to do it ? any step by step tutorial available\nthanks","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":3979,"Q_Id":49386402,"Users Score":0,"Answer":"You can try Heroku. It's free and they got their own tutorials. But it's good enough only if you will use it for studying. AWS, Azure or google cloud are much better for production.","Q_Score":3,"Tags":"python,cloud","A_Id":49386557,"CreationDate":"2018-03-20T14:04:00.000","Title":"How to run python code on cloud","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to automate a Python script on a Google Cloud VM using Crontab.\nWhen I run python Daily_visits.py my code runs as expected and generates a table in BigQuery.\nMy Crontab job is as follows: *\/2 * * * * \/usr\/bin\/python Daily_visits.py but generates no output.\nI've run which python and I get \/usr\/bin\/python back, and I have run chmod +x Daily_visits.sh on my file, what else am I missing?","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":842,"Q_Id":49386938,"Users Score":4,"Answer":"You should write absolute path for Daily_visits.py file. Go to Daily_visits.py file's directory and run command:\npwd\nYou take output like it:\n\/var\/www\/Daily_visits.py\nCopy and paste it change into crontab.\n*\/2 * * * * \/usr\/bin\/python \/var\/www\/Daily_visits.py","Q_Score":0,"Tags":"python,linux,google-cloud-platform","A_Id":49387025,"CreationDate":"2018-03-20T14:28:00.000","Title":"Automating a Python script with Crontab","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm developing a service which has to copy multiple files from a central node to remote servers. \nThe problem is that each time the service is executed, there are new servers and new files to dispatch to these servers. I mean, in each execution, I have the information of which files have to be copied to each server and in which directory.\nObviously, this information is very dynamically changing, so I would like to be able to automatize this task. I tried to get a solution with Ansible, FTP and SCP over Python.\n\nI think Ansible is very difficult to automatize every scp task in each execution.\nSCP is ok but I need to build each SCP command in Python to launch it.\nFTP Is too much for this problem because there are not many files to dispatch to a single server.\n\nIs there any better solution than what I thinked about?","AnswerCount":3,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":938,"Q_Id":49387534,"Users Score":0,"Answer":"In case you send some the same file (or files) to different destinations (that can be organized as sets), you could profit from solutions as dsh or parallel-scp.\nIf this will make sense depends on your use-case.","Q_Score":0,"Tags":"python,automation","A_Id":49387782,"CreationDate":"2018-03-20T14:56:00.000","Title":"Best way to copy multiple files to multiple remote servers","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm developing a service which has to copy multiple files from a central node to remote servers. \nThe problem is that each time the service is executed, there are new servers and new files to dispatch to these servers. I mean, in each execution, I have the information of which files have to be copied to each server and in which directory.\nObviously, this information is very dynamically changing, so I would like to be able to automatize this task. I tried to get a solution with Ansible, FTP and SCP over Python.\n\nI think Ansible is very difficult to automatize every scp task in each execution.\nSCP is ok but I need to build each SCP command in Python to launch it.\nFTP Is too much for this problem because there are not many files to dispatch to a single server.\n\nIs there any better solution than what I thinked about?","AnswerCount":3,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":938,"Q_Id":49387534,"Users Score":0,"Answer":"How about rsync ?\nExample: rsync -rave  \nWhere source or destination could be:\nuser@IP:\/path\/to\/dest\nIt knows incremental + you can Cron it or trigger a small script when anything changes","Q_Score":0,"Tags":"python,automation","A_Id":49392450,"CreationDate":"2018-03-20T14:56:00.000","Title":"Best way to copy multiple files to multiple remote servers","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Good day. I have a question about proceeding accepted connections. I have a pythons tornado IOLoop and listening socket. When a new client is connected and this connection is accepted by tornado handler client - interaction begins. That interaction includes multiple requests\/responses, so there is a reason to poll accepted socket for available bytes. How to do polling the correct way? The direct way is to use epoll\/select, but this is like reinventing IOLoop. But is this correct to create IOLoop for each new connection?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":120,"Q_Id":49390862,"Users Score":0,"Answer":"I've searched how \"torando.web\" does it. It works with default IOLoop instance and that instance accepts connections and handles (processes) new sockets that were created after connections were accepted. The second part is done by IOStream.\nSo the answer is to use the same IOLoop object and not to poll sockets manually","Q_Score":0,"Tags":"python,select,tornado,epoll,ioloop","A_Id":49399600,"CreationDate":"2018-03-20T17:40:00.000","Title":"IOLoop\/epoll\/select for accepted connections","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I installed tensorflow on my mac and now I can't seem to open anaconda-navigator. When I launch the app, it appears in the dock but disappears quickly. When I launch anaconda-navigator the terminal I get the following error(s).\nKeyError: 'pip._vendor.urllib3.contrib'","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":155,"Q_Id":49393300,"Users Score":0,"Answer":"I fixed the issue by downgrading to pip version 9.0.1. It appears anaconda doesn't like pip version 9.0.2 I ran: pip install pip==9.0.1","Q_Score":0,"Tags":"python,macos,tensorflow,terminal,anaconda","A_Id":49401566,"CreationDate":"2018-03-20T20:11:00.000","Title":"I installed tensorflow on mac and now I can't open Anaconda","Data Science and Machine Learning":1,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"When I type in: cqlsh in my terminal window, I get an error that says:\n-bash: \/usr\/local\/bin\/cqlsh: \/usr\/local\/opt\/python\/bin\/python2.7: bad interpreter: No such file or directory\nHowever, if I type Python --version the terminal verifies that  Python 2.7.10 installed on my computer.\nIt seems to me like cqlsh is trying to run python but it is in the wrong directory? \nAny help would be greatly appreciated!\nSome more context: I have a docker container with a scylla (cassandra look-alike) database, but I want to use cqlsh locally.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":404,"Q_Id":49393559,"Users Score":0,"Answer":"To run cqlsh the simplest is to do: sudo docker exec -it some-scylla10 cqlsh\nPython2.7 is under \/usr\/bin\/python2.7  inside the scylla container","Q_Score":0,"Tags":"python,linux,cassandra,cqlsh,scylla","A_Id":49419997,"CreationDate":"2018-03-20T20:29:00.000","Title":"cqlsh unable to find the version of Python it needs to execute","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a django app deployed on multiple VMs behind a load balancer. On each django. I want to setup celery and RabbitMQ for the app. Each django app would be running a celery worker, and some of the VMs should be running RabbitMQ in a cluster setup and if a celery worker executes a task others shouldn't execute the same task. Is this approach for setting up celery and RabbitMQ good. Can anyone guide me to how this can be setup (Configurations, tutorial, etc.)?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":458,"Q_Id":49396130,"Users Score":0,"Answer":"For a better use case what you can do is run only a single RabbitMQ instance so if any celery worker can pick the task from queue and after picking up the task it will be removed from the queue so that it would not executed multiple times. Or another thing what you can do is to run celery and rabbitmq on a single separate VM and increase the number of workers of celery while running celery if this helps in your use case.","Q_Score":0,"Tags":"django,python-3.x,rabbitmq,celery,django-celery","A_Id":49414639,"CreationDate":"2018-03-21T00:10:00.000","Title":"Django and RabbitMQ setup","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I'm using MacOS High Sierra.\nI made a symlink to my virtualenv.py\n-rw-r--r--    1 myname  admin   99021  3  7 23:40 virtualenv.py\nAs you can see it has READ permission already.\nand now \/usr\/local\/bin\/virtualenv\nlrwxr-xr-x  1 myname  admin         91  3 21 22:51 virtualenv -> \/Library\/Frameworks\/Python.framework\/Versions\/3.5\/lib\/python3.5\/site-packages\/virtualenv.py\nI think there is no problem with these but I get permission denied error.\nI think I won't know what I'll be doing and I'm afraid to fix these kind of things myself, so I need someone's help.\nThank you.","AnswerCount":1,"Available Count":1,"Score":0.3799489623,"is_accepted":false,"ViewCount":314,"Q_Id":49408802,"Users Score":2,"Answer":"chmod -h 400 \/usr\/local\/bin\/virtualenv\nsolved my question. on MacOS -h option can modify symlink permission.","Q_Score":1,"Tags":"python,macos,virtualenv","A_Id":49408992,"CreationDate":"2018-03-21T14:19:00.000","Title":"virtualenv: permission denied error even though i have symlink","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have installed a virtual centos 7.3 server on my windows machine. And on centos server i have installed ipython notebook, by using pip\nI have browser installed on my same windows machine.\nWhen i'm trying to run the ipython notebook from centos server using the command ipython notebook --allow-root\nIt is giving me the link something like: \nhttp:\/\/localhost:8888\/?token=eaa9719ae6456b5d56fd419208a849b1886d8003051714\nand i'm pasting this link to browser, then i'm getting the warning as not able to connect.\nI'm new to ipython, so it would be really helpful if someone could guide me.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":31,"Q_Id":49413082,"Users Score":0,"Answer":"After, lot of searching, i just tried unblocking the firewall, and yeah it worked.\nI followed the below steps:\n\nCheck the status of firewall systemctl status firewalld\nDisabling the firewall systemctl disable firewalld\nstop the firewall systemctl stop firewalld\n\nand yeah, it worked.","Q_Score":0,"Tags":"ipython","A_Id":49461783,"CreationDate":"2018-03-21T17:34:00.000","Title":"Run the ipython notebook from centos server to windows browser","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to find pid of a oracle process by using below command\nps -ef | grep pmon | grep orcl | grep -v grep\nWhen trying to use python \noracle_pid = os.system(\"echo ps -ef | grep pmon | grep %s | grep -v grep | awk '{print $2}'\" %(oracle_sid))\nprint(oracle_pid)\nit is printing 0 as value\nAny suggestions on how to achieve just the pid as output?\nRegards","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":182,"Q_Id":49419095,"Users Score":0,"Answer":"Thanks for the reply !!!\nThe command works but it is adding extra characters\n\n\n\nimport subprocess\n      subprocess.check_output(\"ps -ef | grep pmon | grep orcl | grep -v grep | awk '{print $2}'\", stderr=subprocess.STDOUT, shell=True)\n      b'21648\\n'","Q_Score":1,"Tags":"python,python-3.6","A_Id":49436806,"CreationDate":"2018-03-22T01:28:00.000","Title":"Find pid using python by grepping two variables","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"My company needs me to create a tool to read and send messages over a controller area network(CANBUS).  I've been successful in creating one in an Ubuntu virtual environment. \n\nCan I use my Linux program in windows? (Written in python)\nIf I have to recreate it for windows, what would be the best coding language to interact with the bus and its hardware?\nAre there any libraries that work well with canbus through windows?","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":602,"Q_Id":49431740,"Users Score":0,"Answer":"I'm not sure about (3), but here's what I can say for (1) and (2):\nIs it gonna work on Windows?\nI don't know.\nIt depends on the modules you used.\nMost of the time it is portable across platforms, but you might have to change some portions of the code.\nIf you mostly used TkInter and PySerial, it should work on Windows as well, but you need to give it a try.\nWhat's the best language for doing this on Windows?\nIf you have a working version of your program for Linux, you should stick to porting it onto Windows, it shouldn't be too hard if what you used was standard.\nThus, I'd say that the best language is the one that already works on another platform.\nHowever, if it happened that Python was definitely not suited for this program on Windows, then the best language would probably be the one you know best, as long as you're sure it provides the features you need.","Q_Score":2,"Tags":"python,windows,ubuntu,tkinter,can-bus","A_Id":49431984,"CreationDate":"2018-03-22T14:52:00.000","Title":"Python-Can or Pyserial in Windows","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"My company needs me to create a tool to read and send messages over a controller area network(CANBUS).  I've been successful in creating one in an Ubuntu virtual environment. \n\nCan I use my Linux program in windows? (Written in python)\nIf I have to recreate it for windows, what would be the best coding language to interact with the bus and its hardware?\nAre there any libraries that work well with canbus through windows?","AnswerCount":2,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":602,"Q_Id":49431740,"Users Score":2,"Answer":"1. Can I use my Linux program in windows? (Written in python)\nYes, you can. Python is SO agnostic. You will obviously need to install Python for Windows. Check which driver dependancies has the library you used for Python as you may need to install some driver in your PC.\n2. If I have to recreate it for windows, what would be the best coding language to interact with the bus and its hardware?\nNo need to recreate it\n3. Are there any libraries that work well with canbus through windows?\nSame as on Linux.","Q_Score":2,"Tags":"python,windows,ubuntu,tkinter,can-bus","A_Id":49431976,"CreationDate":"2018-03-22T14:52:00.000","Title":"Python-Can or Pyserial in Windows","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I've downloaded Python about a year ago, and back then, I had trouble executing files from the terminal. So, being ye of little faith, I quit trying and forgot most of my Python knowledge. Now, I' revisiting Python, and it still doesn't work (I updated Python. And deleted it. And updated again) But it still does not work. I made sure I'm in the directory that Python is supposedly in. Please help.","AnswerCount":2,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":9018,"Q_Id":49440211,"Users Score":1,"Answer":"Even easier,\nlaunch again the setup of Python and click on 'Modify'.\nIn the \"Advanced Options\", check \"Add Python to environment variables\"","Q_Score":0,"Tags":"python-3.x,command-line,terminal","A_Id":60899827,"CreationDate":"2018-03-22T23:40:00.000","Title":"Python command is not working in terminal","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"When doing python setup.py bdist_wheel I got an error:\nerror: error in setup.cfg: command 'bdist_wheel' has no such option 'universal'\nHow do I fix this?","AnswerCount":1,"Available Count":1,"Score":0.3799489623,"is_accepted":false,"ViewCount":1925,"Q_Id":49455926,"Users Score":2,"Answer":"Turns out my wheel package was out of date (v0.22 isn't new enough).  A quick pip install --upgrade wheel and it built happily. \nBefore I figured that out, though, I'd spent a fruitless half hour upgrading pip and setuptools and python-distutils-extra.","Q_Score":0,"Tags":"python,setuptools,python-wheel","A_Id":49455927,"CreationDate":"2018-03-23T18:07:00.000","Title":"How do I fix \"error: error in setup.cfg: command 'bdist_wheel' has no such option 'universal'\"","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I tried to do this with WMI, but interactive processes cannot be started with it (as stated in Microsoft documentation). I see processes in task manager, but windows do not show.\nI tried with Paramiko, same thing. Process visible in task manager, but no window appears (notepad for example).\nI tried with PsExec, but the only case a window appears on the remote machine, is when you specify -i and it does not show normally, only through a message box saying something like \"a message arrived do you want to see it\".\nDo you know a way to start a program remotely, and have its interface behave like it would if you manually started it?\nThanks.","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":972,"Q_Id":49459745,"Users Score":0,"Answer":"Normally the (SSH) servers run as a Windows service.\nWindow services run in a separate Windows session (google for \"Session 0 isolation\"). They cannot access interactive (user) Windows sessions.\nAlso note that there can be multiple user sessions (multiple logged in users) in Windows. How would the SSH server know, what user session to display the GUI on (even if it could)?\nThe message you are getting is thanks to the \"Interactive Services Detection\" service that detects that a service is trying to show a GUI on an invisible Session 0 and allows you to replicate the GUI on the user session.\n\nYou can run the SSH server in an interactive Windows session, instead as a service. It has its limitations though.\n\nIn general, all this (running GUI application on Windows remotely through SSH) does not look like a good idea to me.\nAlso this question is more about a specific SSH server, rather that about an SSH client you are using. So you you include details about your SSH server, you can get better answers.","Q_Score":1,"Tags":"python,windows,ssh,paramiko,remote-desktop","A_Id":49462185,"CreationDate":"2018-03-23T23:51:00.000","Title":"Trying to remotely start a process with visible window with Python on Windows machines","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I tried to do this with WMI, but interactive processes cannot be started with it (as stated in Microsoft documentation). I see processes in task manager, but windows do not show.\nI tried with Paramiko, same thing. Process visible in task manager, but no window appears (notepad for example).\nI tried with PsExec, but the only case a window appears on the remote machine, is when you specify -i and it does not show normally, only through a message box saying something like \"a message arrived do you want to see it\".\nDo you know a way to start a program remotely, and have its interface behave like it would if you manually started it?\nThanks.","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":972,"Q_Id":49459745,"Users Score":0,"Answer":"ok i found a way. With subprocess schtasks( the windows task scheduler). For whatever reason, when i launch a remote process with it , it starts as if i had clicked myself on the exe. For it to start with no delay, creating the task to an old date like 2012 with schtasks \/Create \/F and running the then named task with schtasks \/Run will do the trick","Q_Score":1,"Tags":"python,windows,ssh,paramiko,remote-desktop","A_Id":49482445,"CreationDate":"2018-03-23T23:51:00.000","Title":"Trying to remotely start a process with visible window with Python on Windows machines","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying install TensorFlow on ubuntu 16.04, when I run python->import TensorFlow, \nI got error: \n\nserialized_pb=_b('\\n\/tensorflow\/core\/framework\/resource_handle.proto\\x12\\ntensorflow\\\"r\\n\\x13ResourceHandleProto\\x12\\x0e\\n\\x06\\x64\\x65vice\\x18\\x01\n  \\x01(\\t\\x12\\x11\\n\\tcontainer\\x18\\x02 \\x01(\\t\\x12\\x0c\\n\\x04name\\x18\\x03\n  \\x01(\\t\\x12\\x11\\n\\thash_code\\x18\\x04\n  \\x01(\\x04\\x12\\x17\\n\\x0fmaybe_type_name\\x18\\x05\n  \\x01(\\tB\/\\n\\x18org.tensorflow.frameworkB\\x0eResourceHandleP\\x01\\xf8\\x01\\x01\\x62\\x06proto3')\n  TypeError: init()got an unexpected keyword argument 'syntax'\n\nI have googled this, some one said the problem is wrong version of protobuf, when I type \"protobuf --version\" which shows Missing output directives, this was showing 3.3.0 before I installed bazel, but when I have tried : \" import google.protobuf \" and \"print google.protobuf.version \" which shows: 3.5.2.post1\nCan anyone tell me what is wrong !!!!","AnswerCount":2,"Available Count":2,"Score":0.0996679946,"is_accepted":false,"ViewCount":1292,"Q_Id":49463060,"Users Score":1,"Answer":"Try uninstalling protobuf and then check if Tensorflow works. If it still does not work try reinstalling Tensorflow.\nIf it still does not work trying using virtual environment in python.","Q_Score":1,"Tags":"python,tensorflow","A_Id":49463304,"CreationDate":"2018-03-24T09:15:00.000","Title":"python TensorFlow import failed","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying install TensorFlow on ubuntu 16.04, when I run python->import TensorFlow, \nI got error: \n\nserialized_pb=_b('\\n\/tensorflow\/core\/framework\/resource_handle.proto\\x12\\ntensorflow\\\"r\\n\\x13ResourceHandleProto\\x12\\x0e\\n\\x06\\x64\\x65vice\\x18\\x01\n  \\x01(\\t\\x12\\x11\\n\\tcontainer\\x18\\x02 \\x01(\\t\\x12\\x0c\\n\\x04name\\x18\\x03\n  \\x01(\\t\\x12\\x11\\n\\thash_code\\x18\\x04\n  \\x01(\\x04\\x12\\x17\\n\\x0fmaybe_type_name\\x18\\x05\n  \\x01(\\tB\/\\n\\x18org.tensorflow.frameworkB\\x0eResourceHandleP\\x01\\xf8\\x01\\x01\\x62\\x06proto3')\n  TypeError: init()got an unexpected keyword argument 'syntax'\n\nI have googled this, some one said the problem is wrong version of protobuf, when I type \"protobuf --version\" which shows Missing output directives, this was showing 3.3.0 before I installed bazel, but when I have tried : \" import google.protobuf \" and \"print google.protobuf.version \" which shows: 3.5.2.post1\nCan anyone tell me what is wrong !!!!","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":1292,"Q_Id":49463060,"Users Score":0,"Answer":"Uninstall the protobuf and reinstall Tensorflow\nYou can use commands:\n\nconda uninstall protobuf\n\nNext \n\nconda install tensorflow","Q_Score":1,"Tags":"python,tensorflow","A_Id":53485860,"CreationDate":"2018-03-24T09:15:00.000","Title":"python TensorFlow import failed","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have downloaded the package and it is in whl file when I try to install it, i get this error\n\nC:\\Python34\\Scripts>pip install C:\\Users\\213546472\\Downloads\\python_igraph-0.7.1.post6-cp34-cp34m-win_amd64.whl\n  python_igraph-0.7.1.post6-cp34-cp34m-win_amd64.whl is not a supported wheel on this platform.\n  Storing debug log for failure in C:\\Users\\213546472\\pip\\pip.log","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":517,"Q_Id":49463731,"Users Score":0,"Answer":"You're installing 64-bit wheel. Check that your Python is version 3.4 64 bit. If not \u2014 download a proper wheel (different Python version or 32 bit wheel).","Q_Score":0,"Tags":"python,python-3.x,python-3.4,python-wheel","A_Id":49464284,"CreationDate":"2018-03-24T10:40:00.000","Title":"how to install igraph package for python windows","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"How to install and configure virtualenv and virtualenvwrapper for Python on MacOS?","AnswerCount":8,"Available Count":1,"Score":0.024994793,"is_accepted":false,"ViewCount":59827,"Q_Id":49470367,"Users Score":1,"Answer":"I had many problems to install the virtualenvwrapper in my mac os (big sur) but after I spent my whole sunday on that I finally got it. What I did I do:\n\nI reinstalled python3 using the homebrew. For some reason homebrew\nput your files in a non conventional directories (for exemple:\n\/opt\/homebrew\/bin\/python3 or \/opt\/homebrew\/bin\/virtualenv)\n\nThan I installed the virtualenv (even its already installed in python3\nby default) and I installed virtualenvwrapper in sudo mode: sudo pip3\ninstall virtualenvwrapper (without sudo, I could't find the\nvirtualenvwrapper.sh using whichvirtualenvwrapper).\n\nAfter that, in my home directory (\/\u02dc), I created the .bashrc file using\ntouch .bashrc because this file didn't existed in my home directory.\n\nI used the command \"which python3\", \"which virtualenv\" and \"which\nvirtualenvwrapper.sh\" to get the localization of them (it's important to\nget these location to fill the .bashrc file later). The result was:\n\n\/opt\/homebrew\/bin\/python3\n\/opt\/homebrew\/bin\/virtualenv\n\/opt\/homebrew\/bin\/virtualenvwrapper.sh\n\n\nThan, using vim editor, I wrote in this file like this:\nexport WORKON_HOME=$HOME\/.virtualenvs\nexport PROJECT_HOME=$HOME\/Devel\nexport VIRTUALENVWRAPPER_PYTHON=\/opt\/homebrew\/bin\/python3\nexport VIRTUALENVWRAPPER_VIRTUALENV=\/opt\/homebrew\/bin\/virtualenv\nsource \/opt\/homebrew\/bin\/virtualenvwrapper.sh\n\nThan, I saved this file using :wq command and run it using this command:\nsource .bashrc\n\nThan I testes using the writing \"workon\" command. It showed nothing so\nit worked\n\nFinally I create a virtual environment. It worked.\n\n\nI made a lot of mistakes and I really hope I did't damage my OS.","Q_Score":39,"Tags":"python-3.x,macos,virtualenv,virtualenvwrapper","A_Id":68433523,"CreationDate":"2018-03-24T21:57:00.000","Title":"Install virtualenv and virtualenvwrapper on MacOS","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"A robot is connected to a network with restricted outbound traffic. Only inbound traffic is allowed from one specific IP address(ours IP, e.g. 111.111.111.111). All outgoing traffic is forbidden.\nThere is settings and dhcp corresponding to external IP(e.g. 222.222.222.222). We want to connect to Pepper from the IP 111.111.111.111. The connection through SSH is fine with ssh nao@222.222.222.222 and password but we can not connect through Choregraphe or Python scripts. This is very important because we want to be able to connect with the robot remotely to upload different Choregraphe applications.\nThis is the error when we are trying to connect with a Python script:\n\n[W] 18872 qimessaging.transportsocket: connect: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond\n...\nRuntimeError: Failed to connect to service ALBehaviorManager on machine 1296211e-1921-3131-909b-69afa37\u0430\u0430\u043028. All endpoints are unavailable.\n\nThe Choregraphe hangs and crashes after a certain period of time.\nCan you give me some advice?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":490,"Q_Id":49508903,"Users Score":3,"Answer":"NAOqi connections go through port 9559 by default, so you could check whether that one is blocked.\nIf you are unable to connect through port 9559, you can do a port forwarding.  But I think this is a more network related question.","Q_Score":0,"Tags":"python,networking,connection,pepper,choregraphe","A_Id":49528384,"CreationDate":"2018-03-27T09:18:00.000","Title":"How to connect Choregraphe\/Python script to remote Pepper robot from different network?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Good Day All, \nI finished writing the site blocker process and then i renamed the \"py\" file by appending \"w\", double clicked to run it yet the process did not show up in the task manager. I tried it a few times and yet nothing showed up. Mind you I am on Win 10 OS.\nYou have any suggestions to help fix this such that is shows up in the task manager as pythonw.exe process ?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":2157,"Q_Id":49516056,"Users Score":0,"Answer":"If the process isn't showing up in the Task Manager, it's very likely that it's immediately quitting with an error. Even trivial changes to the code cause this to occur. Without the console showing output it's hard to tell what that error is. Try renaming the file back to filename.py and running it to see if an error is occurring.\nAnother possibility is that the script is completing so fast you don't have time to see it. Did it run instantaneously when it was named filename.py?","Q_Score":0,"Tags":"python,python-3.x,windows-10,pythonw","A_Id":49517945,"CreationDate":"2018-03-27T14:48:00.000","Title":"how to run python 'pyw' file in Windows 10 process","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"How can I automatically run a python script, whenever a Word-File is added to a specific folder? This python script would need to work with the Word-File afterwards. My operating system is Windows.\nThanks for your help in advance.","AnswerCount":6,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":19739,"Q_Id":49557421,"Users Score":0,"Answer":"you can use watchdog, and create your own eventHandler, like, overwriting original functions inside filesystemeventhandler, by creating a class using filesystemeventhandler(class MyHandler(fileSystemEventHandler):), you can change on_any_event or on_created_ or on_modified.","Q_Score":6,"Tags":"python,windows,directory","A_Id":66431678,"CreationDate":"2018-03-29T13:31:00.000","Title":"How to automatically run python script, when file is added to folder?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I used to configure the application name in app.yaml. But I just re-read the latest docs, and they say:\n\nThe recommended approach is to remove the application element from your app.yaml file and instead, use a command-line flag to specify your application ID:\nTo use the gcloud app deploy command, you must specify the --project flag:\ngcloud app deploy --project [YOUR_PROJECT_ID]\nTo use the appcfg.py update command, you specify the -A flag:\nappcfg.py update -A [YOUR_PROJECT_ID]\n\nBut what about dev_appserver.py? How do I configure it with the project name?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":162,"Q_Id":49558119,"Users Score":3,"Answer":"dev_appserver.py also supports the -A flag to set the application id.\nFrom the output for dev_appserver.py -h:\n\n-A APP_ID, --application APP_ID\n                          Set the application, overriding the application value\n                          from the app.yaml file. (default: None)","Q_Score":3,"Tags":"google-app-engine,google-app-engine-python","A_Id":49559800,"CreationDate":"2018-03-29T14:02:00.000","Title":"How to configure application name when running dev_appserver.py?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"In Beam 2.3.0, the DoFn process API needed to return a generator through yield while in Beam 2.4.0, returning an object like dictionary from the process API works fine. \nIs there a change in programming model from 2.3.0 to 2.4.0 ? For large scale Google Cloud Dataflow processing, is yield (generator) preferred over returning objects (list, dict) from the DoFn process API ?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":2370,"Q_Id":49562470,"Users Score":2,"Answer":"My understanding is that you want to return an iterable. So if you return a dictionary, the output will really be the list of its keys. I stick with only using yield for simplicity.","Q_Score":2,"Tags":"python,google-cloud-dataflow,apache-beam","A_Id":49582755,"CreationDate":"2018-03-29T18:01:00.000","Title":"DoFn process return type","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I want to create a simple scheduler in Tornado, where along the course of the app, some job with a (time,callback) is generated dynamically, for example,\nSend a push notification 30 mins before an event, \nbut this reminder is created only after the job is created by the server, which may be through a POST request.\nI wanted to achieve this through PeriodicCallback, but I read that IOLoop.start() must be called after the PeriodicCallback is created. How can I add PeriodicCallback to already running IOLoop or is there any other way?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":157,"Q_Id":49563653,"Users Score":1,"Answer":"There is no requirement that PeriodicCallbacks be started before the IOLoop. You can start them while the IOLoop is running. You have to schedule something before calling IOLoop.start() since that will run forever, but whatever you schedule on the IOLoop can go on to schedule other stuff.","Q_Score":1,"Tags":"python,tornado","A_Id":49568140,"CreationDate":"2018-03-29T19:24:00.000","Title":"Adding PeriodicCallback to already running IOLoop instance","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm currently submitting my U-SQL jobs via the Python library and I want to add additional code in a C# or Python code-behind file. Are code-behind files supported, either in python or in a CLI-based method that I could easily automate? \nIdeally I'd like to use the Azure CLI or the Python library so this can run on both Linux and Windows (i.e. not relying on Visual Studio). I've check the documentation for both PowerShell and Python, but I don't see any instructions on how to submit jobs with code-behind logic.\nHere is my python code:\n\nfrom azure.mgmt.datalake.analytics.job import DataLakeAnalyticsJobManagementClient\n\nadlaJobClient = get_client_from_cli_profile(\n    DataLakeAnalyticsJobManagementClient,\n    adla_job_dns_suffix='azuredatalakeanalytics.net')\n\ndef submit_usql_job(script):\n    job_id = str(uuid.uuid4())\n    job_result = adlaJobClient.job.create(\n        ADLA_ACCOUNT_NAME,\n        job_id,\n        JobInformation(\n            name='Sample Job',\n            type='USql',\n            properties=USqlJobProperties(script=script)\n        )\n    )\n    print(\"Submitted job ID '{}'\".format(job_id))\n    return job_id","AnswerCount":2,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":312,"Q_Id":49568032,"Users Score":1,"Answer":"Likely you're going to have to manage creating and registering the assembly yourself as an additional step in your job. Then reference the assembly as you normally would. If you need an example of what this might look like, submit a job from Visual Studio, for a query that has an accompanying code-behind file, and look at the script that it generates for you. You'll see that it is adding the above steps for you, transparently. Now, you can try applying this same approach\/pattern in your own code. \nEither that or move your code-behind logic to a dedicated library which you can upload and register separately, one-time, then reference it to your heart's content from your python-submitted jobs.","Q_Score":0,"Tags":"python,azure,azure-data-lake,u-sql","A_Id":49577265,"CreationDate":"2018-03-30T03:35:00.000","Title":"Programmatically submit a U-SQL job with code-behind","Data Science and Machine Learning":0,"Database and SQL":1,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a Python app that uses websockets and gevent. It's quite a big application in my personal experience.\nI've encountered a problem with it: when I run it on Windows (with 'pipenv run python myapp'), it can (suddenly but very rarily) freeze, and stop accepting messages. If I then enter CTRL+C in cmd, it starts reacting to all the messages, that were issued when it was hanging.\nI understand, that it might block somewhere, but I don't know how to debug theses types of errors, because I don't see anything in the code, that could do it. And it happens very rarily on completely different stages of the application's runtime.\nWhat is the best way to debug it? And to actually see what goes behind the scenes? My logs show no indication of a problem.\nCould it be an error with cmd and not my app?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":453,"Q_Id":49572547,"Users Score":0,"Answer":"Your answer may be as simple as adding timeouts to some of your spawns or gevent calls.  Gevent is still single threaded, and so if an IO bound resource hangs, it can't context switch until it's been received.  Setting a timeout might help bypass these issues and move your app forward?","Q_Score":0,"Tags":"python,websocket,gevent","A_Id":49618957,"CreationDate":"2018-03-30T10:14:00.000","Title":"Python application freezes, only CTRL-C helps","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"In mininet-wifi examples, I found a sample (6LowPAN.py) that creates a simple topology contains 3 nodes.\nNow, I intend to create another topology as follows:\n\n1- Two groups of sensor nodes such that each group connects to a 'Sink\n  node' \n2- Connect each 'Sink node' to an 'ovSwitch' \n3- Connect the two switches to a 'Controller'\n\nIs that doable using mininet-wifi? Any tips how to do it??\nMany thanks in advance :)","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":444,"Q_Id":49586831,"Users Score":1,"Answer":"Yes, you can do this with 6LowPAN.py. You then add switches and controller into the topology with their links.","Q_Score":0,"Tags":"python,emulation,sdn,mininet,openflow","A_Id":49602289,"CreationDate":"2018-03-31T10:41:00.000","Title":"Building WSN topology integrated with SDN controller (mininet-wifi)","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I just installed the abcde CD utility but it's complaining that it can't find eyeD3, the Python ID3 program. This appears to be a well-known and unresolved deficiency in the abcde dependencies, and I'm not a Python programmer, so I'm clueless.\nI have the Python 2.7.12 came with Mint 18, and something called python3 (3.5.2). If I try to install eyeD3 with pip (presumably acting against 2.7.12), it says it's already installed (in \/usr\/lib\/python2.7\/dist-packages\/eyeD3). I don't know how to force pip to install under python3.\nIf I do a find \/ -name eyeD3, the only other thing it turns up is \/usr\/share\/pyshared\/eyeD3. But both of those are only directories, and both just contain Python libraries, not executables. \nThere isn't any other file called eyeD3 anywhere on disk.\nDoes anyone know what it's supposed to be called, where it's supposed to live, and how I can install it? \nP","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":1262,"Q_Id":49599452,"Users Score":0,"Answer":"Gave up...waste of my time and everyone else's sorry.\nWhat I apparently needed was the eyed3 (lowercase 'd') non-python utility.","Q_Score":2,"Tags":"python,eyed3","A_Id":49675091,"CreationDate":"2018-04-01T15:08:00.000","Title":"Finding the eyeD3 executable","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I just installed the abcde CD utility but it's complaining that it can't find eyeD3, the Python ID3 program. This appears to be a well-known and unresolved deficiency in the abcde dependencies, and I'm not a Python programmer, so I'm clueless.\nI have the Python 2.7.12 came with Mint 18, and something called python3 (3.5.2). If I try to install eyeD3 with pip (presumably acting against 2.7.12), it says it's already installed (in \/usr\/lib\/python2.7\/dist-packages\/eyeD3). I don't know how to force pip to install under python3.\nIf I do a find \/ -name eyeD3, the only other thing it turns up is \/usr\/share\/pyshared\/eyeD3. But both of those are only directories, and both just contain Python libraries, not executables. \nThere isn't any other file called eyeD3 anywhere on disk.\nDoes anyone know what it's supposed to be called, where it's supposed to live, and how I can install it? \nP","AnswerCount":2,"Available Count":2,"Score":0.0996679946,"is_accepted":false,"ViewCount":1262,"Q_Id":49599452,"Users Score":1,"Answer":"I don't know how to force pip to install under python3.\n\npython3 -m pip install eyeD3 will install it for Python3.","Q_Score":2,"Tags":"python,eyed3","A_Id":49600355,"CreationDate":"2018-04-01T15:08:00.000","Title":"Finding the eyeD3 executable","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am running my code from the shell(SSH) in google cloud as \n\npython3 mycode.py\n\nIf I close the shell, the computation stops. How can I start a computation and then close the shell(Computation takes a long Time:)).....come back later and see how it is doing. \nMy code keeps printing results after a certain number of iteration.","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":1024,"Q_Id":49603198,"Users Score":2,"Answer":"Well, in general what you can do is run the code in a way where you can detach from the interactive environment. Using a tool such as screen or tmux. However, Google Cloud Shell is not made for running background tasks, and if i recall correctly, it will terminate after an hour.\nYou might need to provision a virtual machine to run it on instead. I can recommend using tmux. With tmux, it will be as simple as running tmux and then in the new shell running your script python3 mycode.py. You can then detach using ctrl+b d or simply disconnect. When you reconnect you run tmux attach -dto get back to your script.","Q_Score":1,"Tags":"python-3.x,shell,google-cloud-platform,google-compute-engine","A_Id":49603363,"CreationDate":"2018-04-01T22:26:00.000","Title":"Google Cloud Shell scripting Issue","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Is there a way to use Celery for:\n\nQueue a HTTP call to external URL with Form parameters (HTTP Post to\nURL)\nThe external URL will respond HTTP response, 200, 404, 400 etc, if\nresponse is in form of error non-200-ish response it will retry for\na certain number of retry and will retire as needed\nAdd Task \/ Job \/ Work queue into Celery using REST API, passing the URL to call and Form parameters","AnswerCount":3,"Available Count":1,"Score":0.0665680765,"is_accepted":false,"ViewCount":7519,"Q_Id":49608179,"Users Score":1,"Answer":"you can use flower rest API to do the same, as flower is a monitoring tool for celery. But it comes with rest api to add task and all\nhttps:\/\/flower.readthedocs.io\/en\/latest\/index.html","Q_Score":4,"Tags":"python,rest,celery","A_Id":58300556,"CreationDate":"2018-04-02T08:53:00.000","Title":"Celery REST API","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"This is starting to get aggravating. I'm getting the typical  'python' is not recognized as an internal or external command... message when trying to run python on the command line. This is a common issue, and I've found plenty of posts saying to fix it by adding python folder (C:\\Users\\ftake\\Anaconda3) my Windows path (restarted my PC after that) but nothing worked for me. The problem is that I've already Anaconda 1.8.2 installed on my computer and when trying to run python on CMD an error message occurs saying that python is not recognized as an internal...\nI've tried to install pyinstaller (or any other Python packages) using pip, a message occurs too 'pip' is not recognized as an internal or external command...\nEven though when trying to run (on CMD) the following command to create a virtual environment: virtualenv --python=python3.6.3 <env-name>\nI'm using:\nOS: Windows 10 Pro.\nAnaconda Version: 1.8.2","AnswerCount":6,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":40737,"Q_Id":49616399,"Users Score":0,"Answer":"once and for all clarification when you get this python or pip is not recognised error in windows command prompt happens often when multiple IDE installations \nGo to environmental variables then to system variables where you change or add this\nsometimes your anaconda3 path maybe in allusers if you install it as administator so go through the C drive to get that \nexample C:\\Users\\All Users\\anaconda3\nIf not try py -m pip install yourpackage","Q_Score":12,"Tags":"python,pip,anaconda,virtualenv,conda","A_Id":53586478,"CreationDate":"2018-04-02T18:08:00.000","Title":"Windows: Anaconda 'python' is not recognized as an internal or external command on CMD (Updated)","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"This is starting to get aggravating. I'm getting the typical  'python' is not recognized as an internal or external command... message when trying to run python on the command line. This is a common issue, and I've found plenty of posts saying to fix it by adding python folder (C:\\Users\\ftake\\Anaconda3) my Windows path (restarted my PC after that) but nothing worked for me. The problem is that I've already Anaconda 1.8.2 installed on my computer and when trying to run python on CMD an error message occurs saying that python is not recognized as an internal...\nI've tried to install pyinstaller (or any other Python packages) using pip, a message occurs too 'pip' is not recognized as an internal or external command...\nEven though when trying to run (on CMD) the following command to create a virtual environment: virtualenv --python=python3.6.3 <env-name>\nI'm using:\nOS: Windows 10 Pro.\nAnaconda Version: 1.8.2","AnswerCount":6,"Available Count":2,"Score":0.0333209931,"is_accepted":false,"ViewCount":40737,"Q_Id":49616399,"Users Score":1,"Answer":"Even i faced the same problem because of python path was not added in environment variable ,follow below steps :\n\nGo to Anaconda prompt type : where python\nsay it is C:\\ProgramFiles\\Anaconda3\\python.exe\nOpen \"Advanced system setting\" from main menu. In environment variable,edit path and add path :    C:\\ProgramFiles\\Anaconda3\nNow in command prompt you see by typing : python --version\n\n& the error \"python' is not recognized as an internal or external command on CMD\" will also go off.","Q_Score":12,"Tags":"python,pip,anaconda,virtualenv,conda","A_Id":55016424,"CreationDate":"2018-04-02T18:08:00.000","Title":"Windows: Anaconda 'python' is not recognized as an internal or external command on CMD (Updated)","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm not quite sure this question belong to StackOverflow and not other SE website, but since it's python related I thought it might fit.\nRecently, I started getting error in my IDE (details on my IDE below) - I get an error \"cannot find reference 'path' in 'os.py'\"\nLooking into os.py, I realize that os.path is just an alias for posixpath.py (on Linux) or ntpath.py (on Windows).\nNow, no change has been made to my python installation, and when running scripts that import os.path (or from it), they all run fine, so there is no actual error, just annoying warning in my IDE. I tried changing the project interpreter in the IDE and it didn't work. I also tried running from terminal with the said IDE, and it worked fine. \nCould it be a bug in PyCharm? \nI looked online and couldn't find bug report or anyone struggling with the same problem. \n\nPyCharm build details:\nPyCharm 2018.1 (Community Edition)\nBuild #PC-181.4203.547, built on March 26, 2018\nJRE: 1.8.0_152-release-1136-b20 amd64\nJVM: OpenJDK 64-Bit Server VM by JetBrains s.r.o\nLinux 4.7.0-0.bpo.1-amd64","AnswerCount":2,"Available Count":1,"Score":0.2913126125,"is_accepted":false,"ViewCount":912,"Q_Id":49617465,"Users Score":3,"Answer":"I suppose it is a bug (or behavior) introduced in the very last version of PyCharm. Indeed, it has been happening to me since the last update I recently installed.\nHowever, I temporary ignored these unresolved references in PyCharm to avoid the annoying and misleading warnings.\nTo do so, if you are importing os.path this way (e.g.):\nfrom os.path import join\nGo to PyCharm preferences -> Editor -> Inspections\nThen, look for \"Unresolved references\" under \"Python\" and add the following entries:\n\nos.path\njoin\n\nHope this helps, \nGiuliano","Q_Score":8,"Tags":"python,linux,pycharm","A_Id":49628737,"CreationDate":"2018-04-02T19:23:00.000","Title":"weird behavior when importing os.path","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Windows command netsh interface show interface shows all network connections and their names. A name could be Wireless Network Connection, Local Area Network or Ethernet etc.\nI would like to change an IP address with netsh interface ip set address \"Wireless Network Connection\" static 192.168.1.3 255.255.255.0 192.168.1.1 1 with Python script, but I need a network interface name. \nIs it possible to have this information like we can have a hostname with socket.gethostname()? Or I can change an IP address with Python in other way?","AnswerCount":1,"Available Count":1,"Score":0.3799489623,"is_accepted":false,"ViewCount":2892,"Q_Id":49624485,"Users Score":2,"Answer":"I don't know of a Python netsh API. But it should not be hard to do with a pair of subprocess calls. First issue netsh interface show interface, parse the output you get back, then issue your set address command.\nOr am I missing the point?","Q_Score":0,"Tags":"python,static-ip-address","A_Id":49625033,"CreationDate":"2018-04-03T07:25:00.000","Title":"How to find out Windows network interface name in Python?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm reading headfirst python and have just completed the section where I created a module for printing nested list items, I've created the code and the setup file and placed them in a file labeled \"Nester\" that is sitting on my desktop. The book is now asking for me to install this module onto my local copy of Python. The thing is, in the example he is using the mac terminal, and I'm on windows. I tried to google it but I'm still a novice and a lot of the explanations just go over my head. Can someone give me clear thorough guide?.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":888,"Q_Id":49629518,"Users Score":0,"Answer":"On Windows systems, third-party modules (single files containing one or more functions or classes) and third-party packages (a folder [a.k.a. directory] that contains more than one module (and sometimes other folders\/directories) are usually kept in one of two places: c:\\\\Program Files\\\\Python\\\\Lib\\\\site-packages\\\\ and c:\\\\Users\\\\[you]\\\\AppData\\\\Roaming\\\\Python\\\\. \nThe location in Program Files is usually not accessible to normal users, so when PIP installs new modules\/packages on Windows it places them in the user-accessible folder in the Users location indicated above. You have direct access to that, though by default the AppData folder is \"hidden\"--not displayed in the File Explorer list unless you set FE to show hidden items (which is a good thing to do anyway, IMHO). You can put the module you're working on in the AppData\\\\Roaming\\\\Python\\\\ folder.\nYou still need to make sure the folder you put it in is in the PATH environment variable. PATH is a string that tells Windows (and Python) where to look for needed files, in this case the module you're working on. Google \"set windows path\" to find how to check and set your path variable, then just go ahead and put your module in a folder that's listed in your path.\nOf course, since you can add any folder\/directory you want to PATH, you could put your module anywhere you wanted--including leaving it on the Desktop--as long as the location is included in PATH. You could, for instance, have a folder such as Documents\\\\Programming\\\\Python\\\\Lib to put your personal modules in, and use Documents\\\\Programming\\\\Python\\\\Source for your Python programs. You'd just need to include those in the PATH variable. \nFYI: Personally, I don't like the way python is (by default) installed on Windows (because I don't have easy access to c:\\\\Program Files), so I installed Python in a folder off the drive root: c:\\Python36. In this way, I have direct access to the \\\\Lib\\\\site-packages\\\\ folder.","Q_Score":0,"Tags":"python,python-3.x,cmd,module","A_Id":49639764,"CreationDate":"2018-04-03T11:57:00.000","Title":"how do I install my modual onto my local copy of python on windows?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I want to make a small AI speaker.\nIt looks like Google Home, Apple Homepod.\nI installed the Google Assist SDK on my Ubuntu 16.04.\nI can register an action through gactions.\n$ pushtotalk.py --device-model-id ~\nI can use the Google assistant like this.\nBut the dialogue flow is only on the simulator in the actions on google web page.\nCan I use it like pushtotalk.py and can I use intents in the dialogue flow?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":362,"Q_Id":49634701,"Users Score":0,"Answer":"The Google Assistant SDK is just like using the Google Assistant. If you want, you can invoke and communicate with Dialogflow apps just like on a phone.\npushtotalk.py ... \"Talk to my app\"\npushtotalk.py ... \"Hello\"\nThat will go on as you want. You can also access 3P actions like Number Genie.","Q_Score":0,"Tags":"python,dialogflow-es,google-assistant-sdk","A_Id":49638480,"CreationDate":"2018-04-03T16:14:00.000","Title":"How can i use Google Assistant SDK + Dialogflow by CLI(Command Line Interface)?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I installed ansible on MAC High Sierra 10.13.3 and when I am trying to run \n\"ansible --version\" I am receiving following error \n-bash: \/usr\/local\/bin\/ansible: \/usr\/local\/opt\/python\/bin\/python2.7: bad interpreter: No such file or directory\nPlease let me know if you have ran into same issue or have solution.","AnswerCount":3,"Available Count":1,"Score":0.0665680765,"is_accepted":false,"ViewCount":10718,"Q_Id":49643205,"Users Score":1,"Answer":"Changing the python version might be pushing into some compatibility issues\nIt happens, when we have multiple python versions installed in our OS.\nSimple steps for troubleshooting:\n\nCheck the python version\ncommand: which python \/usr\/bin\/python\nCreate a soft link to the path\ncommand : ln -s \/usr\/bin\/python \/usr\/local\/opt\/python\/bin\/python2.7\n\nI hope it will fix the error.","Q_Score":2,"Tags":"python,ansible","A_Id":54246317,"CreationDate":"2018-04-04T05:08:00.000","Title":"getting Ansible bad python interpreter error?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I apologize if this is a duplicate but my search terms didn't find me what I was looking for. \nI only ever 'kill' my python script using its linux process id.\nThis has served me well but now I need to pickle certain things right before terminating. \nWhat is the best practice for communicating with a running Python script from the linux command line? Is there a library I should know about?\nExample action would be sending a terminate command to the running script, but also can see uses in the near future for modifying config variables etc.","AnswerCount":3,"Available Count":1,"Score":0.0665680765,"is_accepted":false,"ViewCount":296,"Q_Id":49647444,"Users Score":1,"Answer":"There is no single best way. Depending on your requirements, you might choose between\n\nSignals. A single signal can communicate a few bits of information (with one signal, one bit; with two signals, two bits, because you can choose which one yon send, etc) and it's one-way; but it's reasonably real-time and asynchronous, so excellent for quick and easy one-way communications, perhaps as out-of-band information in addition to, or on top of, something more complex.\nShared memory is quick and efficient two-way communications but nontrivial to use in practice, and obviously constrained to processes running on the same host.\nSockets are very versatile and reasonably efficient for communication over a network, and reasonable for moderate amounts of data even on the same host.\n\nThis is pretty U*x-centric; Windows programmers tend to use threading and thus shared memory IPC a lot more.","Q_Score":1,"Tags":"python,command-line","A_Id":49654689,"CreationDate":"2018-04-04T09:30:00.000","Title":"Best way to communicate with Python script from command line?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"My website is hosted on Google App Engine using Standard Python.\nIn request handlers, I am setting HTTP header \"cache-control: max-age=3600, public\"\nSo frontend server \"Google Frontend\" caches the response for 1hr(which I want to save cost).\nIn rare cases the content of page changes and I want the content in frontend cache to be invalidated. How can I do that?\nIs there any API for it?\nI can't alter the URL as they have 90% traffic from Google Search.","AnswerCount":1,"Available Count":1,"Score":0.3799489623,"is_accepted":false,"ViewCount":130,"Q_Id":49658369,"Users Score":2,"Answer":"When you set cache-control via the header or meta tag, that tells the browser to store the response.  So, the next time, it will not even ping your server.  This means that you cannot invalidate that cache after set.\nWhat you need is a backend cache. Frameworks like Django, Flask, etc. make this easy.  You can set a template cache, so it responds quickly, without much processing.\nYou can store the response in GAE's memcache, and send from there.  You can easily invalidate that cache, because you have complete control over it.\nAlternatively, you could change the url.  Google reads your canonical meta tag to get the desired indexed url, so you can add a query string, etc., but still save the Google score to that indexed url.","Q_Score":0,"Tags":"python,google-app-engine","A_Id":49659939,"CreationDate":"2018-04-04T18:53:00.000","Title":"How to invalidate cashed URL response from GAE \"server: Google Frontend\"","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I have a bunch of Batch and Powershell scripts in my Ubuntu machine and I want to remotely execute them on windows and retrieve their results using python. \nPS: I've already tried paramiko but it only works when the scripts in question are already on the remote machine.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":188,"Q_Id":49675458,"Users Score":1,"Answer":"of course it \"only works when the scripts in question are already on the remote machine\". You can't \"remotely\" execute a local program (script, whatever), it has to be on the machine where it's supposed to be executed. The solution is plain simple: upload the script on the remote machine, then use paramiko to execute it.","Q_Score":0,"Tags":"python,linux,windows,scripting","A_Id":49675658,"CreationDate":"2018-04-05T14:55:00.000","Title":"Remotely execute a script ( batch\/powershell) in windows from linux","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"After running brew install python@2, brew installs python into \/usr\/bin\/python, not \/usr\/local\/bin . \nThis prevents me from running certain commands since programs can't find python2. How can I get brew to install python in the 'correct' place?\nThis is causing problems.\nI have python3 correctly installed in \/usr\/local\/bin\/python3.","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":1266,"Q_Id":49680829,"Users Score":0,"Answer":"Try \"brew doctor\" to get a better picture of what is installed where and any issues to the installations using brew.\nOne suggestion is to let the installable be where the homebrew has installed. If you want any specific version to be used, try creating softlinks to the executable in any of the system Path's and use that softlink to invoke the version of Python2 you want.\nHope this will help you overcome your challenges.\nRegards,\nEby","Q_Score":1,"Tags":"python,homebrew","A_Id":49681003,"CreationDate":"2018-04-05T20:16:00.000","Title":"How to specify location of Brew install of Python?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I defined some command line tools of python (take mycmd.py as an example), and saved them in the folder ~\/Scripts. Hence, I have to type (for example) python \/Scripts\/mycmd.py -o v. It is tedious to repeat the name of the folder \/Scripts. I want to run the command only inputting python mycmd.py -o v, even without cd. How should I do? Add a path to the original one?\nPS: in mac","AnswerCount":2,"Available Count":1,"Score":-0.0996679946,"is_accepted":false,"ViewCount":66,"Q_Id":49728799,"Users Score":-1,"Answer":"Add the path to PYTHONPATH environment variable.","Q_Score":1,"Tags":"python,command-line,path","A_Id":49728849,"CreationDate":"2018-04-09T08:41:00.000","Title":"set path for command line of python (mac)","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I was wondering what others are doing to expose REST api endpoints with the datastore (using app engine standard). I want to use urlsafe keys but 1 - I'd rather not pass this data directly as it poses a security risk since app-engine to app-engine calls are exposed over a public ip, and 2 - the keys that are generated are very long and would not be great when multiple need to be passed as a query parameter to form a get request (and would probably exceed browser character limits).\nI was thinking maybe using compression of some sort to compress the urlsafe keys which would solve both 1 and 2, but want to see if there is a better way to create REST endpoints. Or if some type of compression method is already baked into ndb?","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":90,"Q_Id":49737087,"Users Score":1,"Answer":"Google uses HTTPS internally so I'm not sure you need to worry about it.  \nAlso, you should probably design your app so that keys are not secret info and such that it is safe to expose them.\nI use key IDs for my REST calls, which I believe are 12 digit numbers.  That works as long as you know the entity type.  If you need to specify the entity type, you could add another parameter to your API call.","Q_Score":0,"Tags":"rest,google-app-engine,google-cloud-datastore,app-engine-ndb,google-app-engine-python","A_Id":49739232,"CreationDate":"2018-04-09T16:01:00.000","Title":"NDB urlsafe keys and REST api requests","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"How to browse HDFS File-system from an UI like Hue does using python?\nI want to list hdfs files from simple html UI","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":230,"Q_Id":49757912,"Users Score":1,"Answer":"This doesn't involve Python, but you can view this from the NameNode's web UI using \"Utilities -> Browse the file system\", located at http:\/\/your-namenode:50070\/explorer.html (assuming default http port of 50070)","Q_Score":0,"Tags":"python,hdfs","A_Id":49758107,"CreationDate":"2018-04-10T15:46:00.000","Title":"Browsing Hdfs Filesystem from UI","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am new to openshift, we are trying to deploy a python module in a pod which is accessed by other python code running in different pods. When i was deploying, the pod is running and immediately crash with status \"Crash Loop Back Off\".This python code is an independent module which does not have valid entrypoint. So how to deploy those type of python modules in openshift. Appreciate for any solutions","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":67,"Q_Id":49783768,"Users Score":0,"Answer":"You don't. You deploy something that can run as a process, and as such, has a capability to contact with the external world in some way (ie. listen for requests, connect to message broker, send requests, read\/write to db etc.) you do not package and deploy libraries that on their own are inoperable to the cluster.","Q_Score":0,"Tags":"python,kubernetes,openshift","A_Id":49784080,"CreationDate":"2018-04-11T20:14:00.000","Title":"Kubernetes OpenShift for python","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"The pycharm cannot find python 2.7.14\nI have just update the version of python from 2.7.10 to 2.7.14. When I check the version in terminal by python --version or python2 --version, the version is 2.7.14.\nHowever, when I am using pycharm, it still use the 2.7.10 and I cannot find python 2.7.14.\nI have try \/Library\/Frameworks\/Python.framework\/Versions\/2.7\/bin\/python --version, and the version is 2.7.14. When I try \/System\/Library\/Frameworks\/Python.framework\/Versions\/2.7\/bin\/python2.7 --version the version is 2.7.10.\nso how can I delete the version of 2.7.10 and set pycharm as 2.7.14?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":62,"Q_Id":49800112,"Users Score":1,"Answer":"Python is a necessary library for the mac os system, so DO NOT DELETE IT at all costs, you'll break your OS. You need to tell PyCharm to use another Python version, which can be found under settings (Python Interpreter), where you'll be able to find your new version.","Q_Score":1,"Tags":"python,macos,python-2.7,pycharm","A_Id":49800170,"CreationDate":"2018-04-12T15:11:00.000","Title":"In Mac OS, Pycharm cannot find python 2.7.14","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have around 20TB of time series data stored in big query.\nThe current pipeline I have is:\nraw data in big query => joins in big query to create more big query datasets => store them in buckets\nThen I download a subset of the files in the bucket:\nWork on interpolation\/resampling of data using Python\/SFrame, because some of the time series data have missing times and they are not evenly sampled.\nHowever, it takes a long time on a local PC, and I'm guessing it will take days to go through that 20TB of data.\n\nSince the data are already in buckets, I'm wondering what would the best Google tools for interpolation and resampling?\nAfter resampling and interpolation I might use Facebook's Prophet or Auto ARIMA to create some forecasts. But that would be done locally.\n\nThere's a few services from Google that seems are like good options.\n\nCloud DataFlow: I have no experience in Apache Beam, but it looks like the Python API with Apache Beam have missing functions compared to the Java version? I know how to write Java, but I'd like to use one programming language for this task.\nCloud DataProc: I know how to write PySpark, but I don't really need any real time processing or stream processing, however spark has time series interpolation, so this might be the only option?\nCloud Dataprep: Looks like a GUI for cleaning data, but it's in beta. Not sure if it can do time series resampling\/interpolation.\n\nDoes anyone have any idea which might best fit my use case?\nThanks","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":522,"Q_Id":49809084,"Users Score":0,"Answer":"I would use PySpark on Dataproc, since Spark is not just realtime\/streaming but also for batch processing. \nYou can choose the size of your cluster (and use some preemptibles to save costs) and run this cluster only for the time you actually need to process this data. Afterwards kill the cluster.\nSpark also works very nicely with Python (not as nice as Scala) but for all effects and purposes the main difference is performance, not reduced API functionality.\nEven with the batch processing you can use the WindowSpec for effective time serie interpolation\nTo be fair: I don't have a lot of experience with DataFlow or DataPrep, but that's because out use case is somewhat similar to yours and Dataproc works well for that","Q_Score":1,"Tags":"python,apache-spark,google-cloud-platform,google-cloud-dataflow,google-cloud-dataproc","A_Id":49812019,"CreationDate":"2018-04-13T03:56:00.000","Title":"Google Cloud - What products for time series data cleaning?","Data Science and Machine Learning":1,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a website on AppEngine that is 99% static. It is running on Python 2.7 runtime. Now the time has come to evolve this webapp, and since I have almost none Python code in it, I'd prefer to write it in Go instead.\nCan I change runtime from Python 2.7 to Go, while keeping the project intact? Specifically, I want to keep the same app-ID, the same custom domain attached to it, the same SSL certificate, and so on. \nWhat do I have to do in order to do that? I surely have to change runtime in the app.yaml. Is there anything else?\nBonus question: will such change happen without a downtime?\nI'd be grateful for any links to documentation on exactly that (swapping runtime on a live app). I can't find any.","AnswerCount":2,"Available Count":1,"Score":0.3799489623,"is_accepted":false,"ViewCount":562,"Q_Id":49831512,"Users Score":4,"Answer":"Specify a runtime as well as a new value for version.  When deployed you'll have an older version that is Python and a newer version that is Go.  There won't be any downtime (same as when deploying a newer version of Python).\nRather than trusting links\/docs (that may be out of date or not 100% exactly what you're trying to do), why not create a new GAE-Std project for testing purposes and try it yourself.  Having a GAE-Std test project is good for testing new function (especially by other testers who won't have access to the dev environ on your laptop).","Q_Score":2,"Tags":"google-app-engine,google-app-engine-python,google-app-engine-go","A_Id":49832513,"CreationDate":"2018-04-14T12:34:00.000","Title":"Change runtime from Python to Go in App Engine standard environment","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I want to make something in python, but this always appears\n\nCannot update file menu Recent File list Your operating system says\n  [Errrno 13] Premission denied:\n  C:\\Users\\Eigenaar\\.idlerc\\recent-file.Ist\n  Select OK and IDLE will continue without updating.\n\nI read the answers here but nothing works!","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":390,"Q_Id":49834648,"Users Score":0,"Answer":"I have the exact same problem. And, yes, it happens every time that I open IDLE. \nI have Python 3.6.5 in a folder in Program Files, while the files that I have written are in a folder labeled Python under C:\\Users\\John\\Documents.\nI have a hunch that Python wants the files that I have written in a different location, perhaps under C:\\Users\\John.idlerc?\nWhat do folks think?\nJohnR\nPS ~ I didn't see on this web page where to find the answers that others wrote to the original inquiry.","Q_Score":0,"Tags":"python","A_Id":50284449,"CreationDate":"2018-04-14T18:14:00.000","Title":"Cannot update file menu Recent File list Your operating system says [Errrno 13] Premission denied: C:\\\\Users\\\\Eigenaar\\\\.idlerc\\\\recent-file.Ist","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"We're currently trying to convert html files to PDF on AppEngine using Python. The HTML files are from a third-party vendor so we have no control over their format. Both the Flexible and Standard environments are options, but every path we go down we seem to hit a roadblock:\n\nPDFkit requires a wkhtml2pdf install, no PIP package available, however converts perfectly offline\nxhtml2pdf \/ PISA - works even on GAE Standard but doesn't support many features such as float and badly formatted HTML\nWeasyPrint - C dependencies in theory would run on the Flexible environment but no pip packages available for dependencies including Cairo and Pango\n\nHas anyone got a robust solution running on AppEngine with any of the above? Or with other libraries I am missing?","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":870,"Q_Id":49859145,"Users Score":1,"Answer":"I ran into this same problem a year back and concluded that this is currently not possible in App Engine, at least with a good quality conversion. (Someone please point out if things have changed)\nxhtml2pdf - I was able to successfully run it in standard App Engine but not at all happy with the conversion quality.\nPDFkit - Ran into a similar problem and came up with a different solution. Hosted PDFkit on a Compute Engine Instance and exposed an endpoint wherein a POST request with the HTML file will return the converted PDF as a response. This gave me the best\/expected results in terms of quality\/speed of processing. \nIt did incur some extra charges but I was able to utilize the instance for something else too ;). I chose the least possible configuration initially since I was not storing anything on the Compute Engine Instance.","Q_Score":6,"Tags":"python-2.7,google-app-engine","A_Id":49923883,"CreationDate":"2018-04-16T13:59:00.000","Title":"HTML to PDF on Google AppEngine","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I have a python script that is scheduled to run at a fixed time daily\nIf I am not around my colleague will be able to access my computer to run the script if there is any error with the windows task scheduler\nI like to allow him to run my windows task scheduler but also to protect my source code in the script... is there any good way to do this, please?\n(I have read methods to use C code to hide it but I am only familiar with Python)\nThank you","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":656,"Q_Id":49874829,"Users Score":1,"Answer":"Compile the source to the .pyc bytecode, and then move the source somewhere inaccessible.\n\nOpen a terminal window in the directory containing your script\nRun python -m py-compile <yourfile.py> (you should get a yourfile.pyc file)\nMove <yourfile.py> somewhere secure\nyour script can now be run as python <yourfile.pyc>\n\nNote that is is not necessarily secure as such - there are ways to decompile the bytecode - but it does obfuscate it, if that is your requirement.","Q_Score":0,"Tags":"python,password-protection","A_Id":49877159,"CreationDate":"2018-04-17T09:44:00.000","Title":"Password protect a Python Script that is Scheduled to run daily","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm using gremlinpython version 3.3.2 and AWS NEPTUNE.\nI try to drop all the edges (tried the vertices too) and it fails everytime.\ng.E().drop().iterate()\nGives me:  \n\ngremlin_python.driver.protocol.GremlinServerError: 597: Exception\n  processing a script on request [RequestMessage{,\n  requestId=ae49cbb7-e034-4e56-ac76-b62310f753c2, op='bytecode',\n  processor='traversal', args={gremlin=[[], [V(), drop()]],\n  aliases={g=g}}}].\n\nDid anyone already successfuly remove all vertices\/edges of a graph in AWS Neptune?\nEDIT:\nDropping a specific ID works:\ng.E(id).drop().iterate()\nEDIT2:\nHere is a backtrace done using gremlin console:  \n\ngremlin> g.E().count().next()  \n==>740839\n  gremlin> g.E().drop().iterate()\n  A timeout occurred within the script during evaluation of [RequestMessage{, requestId=24c3d14c-c8be-4ed9-a297-3fd2b38ace9a, op='eval',   > processor='', args={gremlin=g.E().drop().iterate(), bindings={}, batchSize=64}}] - consider increasing the timeout\n  Type ':help' or ':h' for help.\n  Display stack trace? [yN]y\n  org.apache.tinkerpop.gremlin.jsr223.console.RemoteException: A timeout occurred within the script during evaluation of [RequestMessage{,   > requestId=24c3d14c-c8be-4ed9-a297-3fd2b38ace9a, op='eval', processor='', args={gremlin=g.E().drop().iterate(), bindings={},   > batchSize=64}}] - consider increasing the timeout\n    at org.apache.tinkerpop.gremlin.console.jsr223.DriverRemoteAcceptor.submit(DriverRemoteAcceptor.java:178)\n    at org.apache.tinkerpop.gremlin.console.GremlinGroovysh.execute(GremlinGroovysh.groovy:99)\n    at org.codehaus.groovy.tools.shell.Shell.leftShift(Shell.groovy:122)\n    at org.codehaus.groovy.tools.shell.ShellRunner.work(ShellRunner.groovy:95)\n    at org.codehaus.groovy.tools.shell.InteractiveShellRunner.super$2$work(InteractiveShellRunner.groovy)\n    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)\n    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)\n    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)\n    at java.lang.reflect.Method.invoke(Method.java:498)\n    at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:98)\n    at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:325)\n    at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1225)\n    at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodOnSuperN(ScriptBytecodeAdapter.java:145)\n    at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodOnSuper0(ScriptBytecodeAdapter.java:165)\n    at org.codehaus.groovy.tools.shell.InteractiveShellRunner.work(InteractiveShellRunner.groovy:130)\n    at org.codehaus.groovy.tools.shell.ShellRunner.run(ShellRunner.groovy:59)\n    at org.codehaus.groovy.tools.shell.InteractiveShellRunner.super$2$run(InteractiveShellRunner.groovy)\n    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)\n    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)\n    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)\n    at java.lang.reflect.Method.invoke(Method.java:498)\n    at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:98)\n    at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:325)\n    at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1225)\n    at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodOnSuperN(ScriptBytecodeAdapter.java:145)\n    at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodOnSuper0(ScriptBytecodeAdapter.java:165)\n    at org.codehaus.groovy.tools.shell.InteractiveShellRunner.run(InteractiveShellRunner.groovy:89)\n    at org.codehaus.groovy.vmplugin.v7.IndyInterface.selectMethod(IndyInterface.java:236)\n    at org.apache.tinkerpop.gremlin.console.Console.(Console.groovy:146)\n    at org.codehaus.groovy.vmplugin.v7.IndyInterface.selectMethod(IndyInterface.java:236)\n    at org.apache.tinkerpop.gremlin.console.Console.main(Console.groovy:453)\n  gremlin>\n\nI would say it's a timeout problem, right?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":1739,"Q_Id":49877928,"Users Score":2,"Answer":"OK so after some exchange with @stephen mallette in comment of the question and AWS support I finally found where the problem lies.\nAs it still a preview NEPTUNE still suffer some smalls issues and drop() is one.\nA workaround, given by the support is to perform drop() in batches via parallel connections:\n\ng.V().limit(1000).drop()  \n\nSo dropping table is hitting a timeout right now, even with a 5 minutes timeout and 700.000 edges.\nI will update this answer on NEPTUNE's release.","Q_Score":2,"Tags":"python,gremlin,amazon-neptune","A_Id":50076688,"CreationDate":"2018-04-17T12:17:00.000","Title":"Drop all edges on AWS Neptune using pythongremlin","Data Science and Machine Learning":0,"Database and SQL":1,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a queue and 3 consumers bind to the queue. Each consumer has a prefetch_count of 250(or say X) and manual acknowledgement is done  prefetch_count(X)\/2(i.e 125) messages - meaning consumer manually acknowledges 125 messages in a single go (which helps to reduce round-trip time and hence increases performance). Everything is working fine as expected but the only issue arises when there are no new messages in the queue and the consumers have some unacknowledged messages whose count is less 125.\nAs the acknowledgement is only sent when the count is 125, these unacknowledged messages keeps requeuing. How can I solve this ?\nHow can I know that my consumer has no new messages to process and can acknowledge all the remaining messages waiting to be acknowledged.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":439,"Q_Id":49878842,"Users Score":1,"Answer":"If I understand your scenario correctly, it sounds as though you have a series of messages that get published all at once, and then you process them in batches of 250 at a time until you have none left.  The problem is, that if you don't have a number of messages that is divisible by 125, then your final batch never gets acknowledged.  Clearly this is a logical problem, but it sounds like you are wondering if there is an easy way to deal with it.\nYour question \"How can I know that my consumer has no new messages to process?\" is based upon a premise which RabbitMQ does not support -- namely, the \"end\" of a sequence of messages.  RabbitMQ consumers expect to continue to receive messages indefinitely, so from their perspective, there is no such thing as \"done.\"\nThus, any such concept must be implemented elsewhere, higher up in your application logic.  Here are some options for you to consider:\n\nIf you know in advance how many messages will be processed, then send that count first and store. Send the final ack once you have processed that number (assuming no duplicates were processed).\nMonitor the in-memory collection at the consumer (all pre-fetched messages reside here until they are actually processed). When it drops below 125, you know that you have a batch size less than that.\nSimilar to #1, send a special \"last message\" that the consumer can receive and know to acknowledge upon receipt.\n\nCaveat: I would argue that you have some deeper design problem going on that is leading down the path where it would ever be desirable to do this in the first place. Each message should be 100% independent of any other message. If that assumption is violated, you will have a very fragile system.","Q_Score":1,"Tags":"python-3.x,rabbitmq","A_Id":49883276,"CreationDate":"2018-04-17T12:59:00.000","Title":"Acknowledging remaining messages for consumer in RabbitMQ","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm trying to generate a Python executable file with Pyinstaller on Linux. For this purpose I'm trying this implementation with a simple 'Hello World' file. \nThe issue I'm having is that when the executable file is generated and I execute it (double-click), nothing happens. There is no console popping out and I can see no execution. I have read in the documentation that in MacOS and Windows there are explicit options in order to make this console appear or not, but not in Linux.\nAny idea?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":491,"Q_Id":49882680,"Users Score":0,"Answer":"You should open your console, and use \"python file.py\" or \"python3 file.py\" command (it depends on Python version), where file.py is your file.\nI hope that I helped.","Q_Score":1,"Tags":"python,console,pyinstaller","A_Id":49883003,"CreationDate":"2018-04-17T16:00:00.000","Title":"Pyinstaller on Linux - How to show a console","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am just getting familiar with Luigi, so I apologize if this is an obvious question, but I am having a hard time understanding it from the documentation.\nIn a situation where I run a workflow with three tasks, and the second task fails, how can I manually re-run the pipeline beginning at the second task? From what I am reading, you can only configure automatic retries. What do you do if all of the auto-retries fail? Do you simply need to kick off a new workflow entirely?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":902,"Q_Id":49906756,"Users Score":0,"Answer":"When you run Luigi, the task scheduler checks which tasks have already completed. If a task as already completed, successfully, it won't run that task again.\nSo if you run it same pipeline again, it should continue where it left off last time, as long as none of the parameter values have changed (which would change the task signature and thus Luigi would create new tasks instead of checking the previous ones, because the same task class executed with different parameters are considered different tasks).","Q_Score":1,"Tags":"python,luigi","A_Id":63567745,"CreationDate":"2018-04-18T18:35:00.000","Title":"Luigi - How to deal with failed workflows","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am installing pyodbc on Redhat 6.5.  Python 2.6 and 2.7.4 are installed.  I get the following error below even though the header files needed for gcc are in the \/usr\/include\/python2.6.\nI have updated every dev package:  yum groupinstall -y 'development tools'\nAny ideas on how to resolve this issue would be greatly appreciated???\nInstalling pyodbc...\nProcessing .\/pyodbc-3.0.10.tar.gz\nInstalling collected packages: pyodbc\n Running setup.py install for pyodbc ... error\n    Complete output from command \/opt\/rh\/python27\/root\/usr\/bin\/python -u -c \"import setuptools, tokenize;file='\/tmp\/pip-JAGZDD-build\/setup.py';exec(compile(getattr(tokenize, 'open', open)(file).read().replace('\\r\\n', '\\n'), file, 'exec'))\" install --record \/tmp\/pip-QJasL0-record\/install-record.txt --single-version-externally-managed --compile:\n    running install\n    running build\n    running build_ext\n    building 'pyodbc' extension\n    creating build\n    creating build\/temp.linux-x86_64-2.7\n    creating build\/temp.linux-x86_64-2.7\/tmp\n    creating build\/temp.linux-x86_64-2.7\/tmp\/pip-JAGZDD-build\n    creating build\/temp.linux-x86_64-2.7\/tmp\/pip-JAGZDD-build\/src\n    gcc -pthread -fno-strict-aliasing -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic -D_GNU_SOURCE -fPIC -fwrapv -DNDEBUG -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic -D_GNU_SOURCE -fPIC -fwrapv -fPIC -DPYODBC_VERSION=3.0.10 -DPYODBC_UNICODE_WIDTH=4 -DSQL_WCHART_CONVERT=1 -I\/Applications\/Xcode.app\/Contents\/Developer\/Platforms\/MacOSX.platform\/Developer\/SDKs\/MacOSX10.8.sdk\/usr\/include -I\/opt\/rh\/python27\/root\/usr\/include\/python2.7 -c \/tmp\/pip-JAGZDD-build\/src\/cnxninfo.cpp -o build\/temp.linux-x86_64-2.7\/tmp\/pip-JAGZDD-build\/src\/cnxninfo.o -Wno-write-strings\n    In file included from \/tmp\/pip-JAGZDD-build\/src\/cnxninfo.cpp:8:\n    **\n**\/tmp\/pip-JAGZDD-build\/src\/pyodbc.h:41:20: error: Python.h: No such file or directory \/tmp\/pip-JAGZDD-build\/src\/pyodbc.h:42:25: error: floatobject.h: No such file or directory \/tmp\/pip-JAGZDD-build\/src\/pyodbc.h:43:24: error: longobject.h: No such file or directory \/tmp\/pip-JAGZDD-build\/src\/pyodbc.h:44:24: error: boolobject.h: No such file or directory \/tmp\/pip-JAGZDD-build\/src\/pyodbc.h:45:27: error: unicodeobject.h: No such file or directory \/tmp\/pip-JAGZDD-build\/src\/pyodbc.h:46:26: error: structmember.h: No such file or directory\n**\n    In file included from \/tmp\/pip-JAGZDD-build\/src\/pyodbc.h:137,\n                     from \/tmp\/pip-JAGZDD-build\/src\/cnxninfo.cpp:8:\n    \/tmp\/pip-JAGZDD-build\/src\/pyodbccompat.h:61:28: error: stringobject.h: No such file or directory\n    \/tmp\/pip-JAGZDD-build\/src\/pyodbccompat.h:62:25: error: intobject.h: No such file or directory\n    \/tmp\/pip-JAGZDD-build\/src\/pyodbccompat.h:63:28: error: bufferobject.h: No such file or directory\n    In file included from \/tmp\/pip-JAGZDD-build\/src\/cnxninfo.cpp:8:\n    \/tmp\/pip-JAGZDD-build\/src\/pyodbc.h: In function \u2018void _strlwr(char*)\u2019:\n    \/tmp\/pip-JAGZDD-build\/src\/pyodbc.h:92: error: \u2018tolower\u2019 was not declared in this scope\n    In file included from \/tmp\/pip-JAGZDD-build\/src\/pyodbc.h:137,\n                     from \/tmp\/pip-JAGZDD-build\/src\/cnxninfo.cpp:8:\n    \/tmp\/pip-JAGZDD-build\/src\/pyodbccompat.h: At global scope:\n    \/tmp\/pip-JAGZDD-build\/src\/pyodbccompat.h:71: error: expected initializer before \u2018*\u2019 token\n    \/tmp\/pip-JAGZDD-build\/src\/pyodbccompat.h:81: error: \u2018Text_Buffer\u2019 declared as an \u2018inline\u2019 variable\n    \/tmp\/pip-JAGZDD-build\/src\/pyodbccompat.h:81: error: \u2018PyObject\u2019 was not declared in this scope\n    \/tmp\/pip-JAGZDD-build\/src\/pyodbccompat.h:81: error: \u2018o\u2019 was not declared in this scope\n    \/tmp\/pip-JAGZDD-build\/src\/pyodbccompat.h:82: error: expected \u2018,\u2019 or \u2018;\u2019 before \u2018{\u2019 token\n    \/tmp\/pip-JAGZDD-build\/src\/pyodbccompat.h:93: error: \u2018Text_Check\u2019 declared as an \u2018inline\u2019 variable\n    \/tmp\/pip-JAGZDD-build\/src\/pyodbccompat.h:93: error: \u2018PyObject\u2019 was not declared in this scope\n    \/tmp\/pip-JAGZDD-build\/src\/pyodbccompat.h:93: error: \u2018o\u2019 was not declared in this scope\n    \/tmp\/pip-JAGZDD-build\/src\/pyodbccompat.h:94: error: expected \u2018,\u2019 or \u2018;\u2019 before \u2018{\u2019 token\n    \/tmp\/pip-JAGZDD-build\/src\/pyodbccompat.h:104: error: \u2018PyObject\u2019 was not declared in this scope\n    \/tmp\/pip-JAGZDD-build\/src\/pyodbccompat.h:104: error: \u2018lhs\u2019 was not declared in this scope\n    \/tmp\/pip-JAGZDD-build\/src\/pyodbccompat.h:104: error: expected primary-expression before \u2018const\u2019\n    \/tmp\/pip-JAGZDD-build\/src\/pyodbccompat.h:104: error: initializer expression list treated as compound expression\n    \/tmp\/pip-JAGZDD-build\/src\/pyodbccompat.h:109: error: \u2018Text_Size\u2019 declared as an \u2018inline\u2019 variable\n    \/tmp\/pip-JAGZDD-build\/src\/pyodbccompat.h:109: error: \u2018PyObject\u2019 was not declared in this scope\n    \/tmp\/pip-JAGZDD-build\/src\/pyodbccompat.h:109: error: \u2018o\u2019 was not declared in this scope\n    \/tmp\/pip-JAGZDD-build\/src\/pyodbccompat.h:110: error: expected \u2018,\u2019 or \u2018;\u2019 before \u2018{\u2019 token\n    \/tmp\/pip-JAGZDD-build\/src\/pyodbccompat.h:118: error: \u2018TextCopyToUnicode\u2019 declared as an \u2018inline\u2019 variable\n    \/tmp\/pip-JAGZDD-build\/src\/pyodbccompat.h:118: error: \u2018Py_UNICODE\u2019 was not declared in this scope\n    \/tmp\/pip-JAGZDD-build\/src\/pyodbccompat.h:118: error: \u2018buffer\u2019 was not declared in this scope\n    \/tmp\/pip-JAGZDD-build\/src\/pyodbccompat.h:118: error: \u2018PyObject\u2019 was not declared in this scope\n    \/tmp\/pip-JAGZDD-build\/src\/pyodbccompat.h:118: error: \u2018o\u2019 was not declared in this scope\n    \/tmp\/pip-JAGZDD-build\/src\/pyodbccompat.h:118: error: initializer expression list treated as compound expression\n    \/tmp\/pip-JAGZDD-build\/src\/pyodbccompat.h:119: error: expected \u2018,\u2019 or \u2018;\u2019 before \u2018{\u2019 token\n    error: command 'gcc' failed with exit status 1","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":441,"Q_Id":49908470,"Users Score":0,"Answer":"The resolution was to re-install Python2.7","Q_Score":0,"Tags":"python,python-2.7,gcc,pyodbc,python-2.6","A_Id":50045919,"CreationDate":"2018-04-18T20:24:00.000","Title":"gcc error when installing pyodbc","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm getting the ModuleNotFoundError: No module named 'lxml' while trying run a python script in Mac os. \nI've installed python in \/usr\/local\/bin. All the libraries are also successfully installed. \nI tried setting the PATH to include the location where the libraries are installed, but it didn't help. Please advise.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":358,"Q_Id":49912414,"Users Score":0,"Answer":"This is fixed by setting the PYTHONPATH Variable in OS X.","Q_Score":0,"Tags":"python,macos","A_Id":49923516,"CreationDate":"2018-04-19T03:50:00.000","Title":"ModuleNotFoundError in Python3.6 Mac OS","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I tried to run a python script on my mac computer, but I ended up in troubles as it needed to install pandas as a dependency.\nI tried to get this dependency, but to do so I installed different components like brew, pip, wget and others including different versions of python using brew, .pkg package downloaded from python.org.\nIn the end, I was not able to run the script anyway.\nNow I would like to sort out the things and have only one version of python (3 probably) working correctly.\nCan you suggest me the way how to get the overview what I have installed on my computer and how can I clean it up?\nThank you in advance","AnswerCount":1,"Available Count":1,"Score":0.6640367703,"is_accepted":false,"ViewCount":5129,"Q_Id":49920886,"Users Score":4,"Answer":"Use brew list to see what you've installed with Brew. And Brew Uninstall as needed. Likewise, review the logs from wget to see where it installed things. Keep in mind that MacOS uses Python 2.7 for system critical tasks; it's baked-into the OS so don't touch it.\nAnything you installed with pip is saved to the \/site-packages directory of the Python version in which you installed it so it will disappear when you remove that version of Python.\nThe .pkg files installed directly into your Applications folder and can be deleted safely like any normal app.","Q_Score":2,"Tags":"python,macos,pip,homebrew","A_Id":49921063,"CreationDate":"2018-04-19T12:15:00.000","Title":"clean up python versions mac osx","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I need to process linux file with multiple parts in the name like:\nabc.def.gh.bz2\nbz2 is the real extension, I need to get abc.def.gh\nCan anyone tell me an elegant way to do this in python?\nThank you very much.","AnswerCount":6,"Available Count":1,"Score":0.0665680765,"is_accepted":false,"ViewCount":2511,"Q_Id":49927030,"Users Score":2,"Answer":".rfind() to find the last dot.\n\ne.g \"abc.def.gh.bz2\".rfind(\".\") would find the index of the last dot\nAny dot below that index would not often* be indicator of filetype. So you could then do e.g filename = \"abc.def.gh.bz2\"[:\"abc.def.gh.bz2\".rfind(\".\")] which should slice away the extension, making filename to be a string of abc.def.gh\n*Though, keep in mind that in some cases e.g tar.gz or gh.bz2 should perhaps be counted as filename extensions. So keep in mind that what is a filename is a rather fleetly subject\nUsing import os.path.splitext is no guarantee at all to getting the \"filename\". and all it will do is slice the . extension from the string passed to it","Q_Score":2,"Tags":"python,string","A_Id":49927079,"CreationDate":"2018-04-19T17:36:00.000","Title":"What's the elegant way to get filename that contains more than one dot in python","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have Redis as my Cache Server. When I call delay() on a task,it takes more than 10 tasks to even start executing. Any idea how to reduce this unnecessary lag?\nShould I replace Redis with RabbitMQ?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":788,"Q_Id":49930990,"Users Score":0,"Answer":"It's very difficult to say what the cause of the delay is without being able to inspect your application and server logs, but I can reassure you that the delay is not normal and not an effect specific to either Celery or using Redis as the broker. I've used this combination a lot in the past and execution of tasks happens in a number of milliseconds.\nI'd start by ensuring there are no network related issues between your client creating the tasks, your broker (Redis) and your task consumers (celery workers).\nGood luck!","Q_Score":1,"Tags":"python,django,asynchronous,redis,celery","A_Id":49931421,"CreationDate":"2018-04-19T22:13:00.000","Title":"After delay() is called on a celery task, it takes more than 5 to 10 seconds for the tasks to even start executing with redis as the server","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"\/usr\/lib64\/python3.6\/lib-dynload\/_posixsubprocess.cpython-36m-x86_64-linux-gnu.so: undefined symbol: _Py_set_inheritable_async_safe\nafter installing the python3-idle on my opensuse , this message will appear when I try to import something","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":1721,"Q_Id":49975494,"Users Score":0,"Answer":"If this happens when importing or using a third-party package, simply uninstall and reinstall the third-party package in question. This fixed it for me. If you don't know which third-party package is relevant, uninstall and reinstall them all.\nThe problem is evidently not with subprocess or _posixsubprocess.","Q_Score":3,"Tags":"linux,python-3.6","A_Id":50220151,"CreationDate":"2018-04-23T07:24:00.000","Title":"Python 3 import error _Py_set_inheritable_async_safe","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Is there a recommended approach in terms of using either Azure CLI or the Azure Python SDK? \nThe CLI seems to be better documented but since it's built on Python, I would assume it will eventually share a lot of the functionality of the Azure Python SDK.\nAny thoughts? Is one more supported over the other?\nFor reference we are building an app built on Linux with both python and the occasional shell script. So we could use either, though we have found the CLI to be easier since it has better documentation.","AnswerCount":2,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":1974,"Q_Id":49994422,"Users Score":19,"Answer":"The Azure CLI v2.0 is written in Python, and then depends on the Azure Python SDK. In order for a feature to go in the CLI, the SDK is required to be released first. So you have 100% equivalent features in both. SDK might be in advance sometimes, waiting for the CLI commands to be written. In addition, this is the same team with the same manager, support is equivalent.\nSDK is more oriented for a RestAPI experience, and will usually be closer to a direct Rest call, but in a Pythonic way. CLI is more oriented \"user friendly\", enabling basic scenarios to be simple with a lot of default parameters. Also, CLI can also provide some complete scenario in one command (i.e. \"create a KV account\") where SDK might take several calls to do the same (under the hood that's the same calls).\nAt the end of the day, if your need is complex, both will be complex anyway. So it's a matter of what you prefer to write.\n(full disclosure, I'm the lead dev in the Azure SDK for Python at Microsoft.)","Q_Score":5,"Tags":"azure,azure-cli,azure-sdk-python","A_Id":50005660,"CreationDate":"2018-04-24T06:00:00.000","Title":"Azure CLI vs Python SDK","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Is there a recommended approach in terms of using either Azure CLI or the Azure Python SDK? \nThe CLI seems to be better documented but since it's built on Python, I would assume it will eventually share a lot of the functionality of the Azure Python SDK.\nAny thoughts? Is one more supported over the other?\nFor reference we are building an app built on Linux with both python and the occasional shell script. So we could use either, though we have found the CLI to be easier since it has better documentation.","AnswerCount":2,"Available Count":2,"Score":0.1973753202,"is_accepted":false,"ViewCount":1974,"Q_Id":49994422,"Users Score":2,"Answer":"There is no real answer to this. I was working on a project where we used both Azure CLI (node one) and Python SDK. I find working with SDK better as this is more native experience than calling shell commands. But, again, this isnt a rule or a law.","Q_Score":5,"Tags":"azure,azure-cli,azure-sdk-python","A_Id":49994476,"CreationDate":"2018-04-24T06:00:00.000","Title":"Azure CLI vs Python SDK","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"when I want to put my project on GAE i get this error in SDK shell:\nERROR: (gcloud.app.deploy) Permissions error fetching application [apps\/responsive-my-super-app-201910]. Please make sure you are using the correct project ID and that you have permission to view applications on the project.","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":47,"Q_Id":50005300,"Users Score":1,"Answer":"You haven't authenticated the cloud SDK. Try running gcloud auth list. Is your email included in the credentialed accounts? If not, run glcoud auth login.\nIf you are listed in the credentialed accounts, then perhaps you haven't properly associated your project with your login, or you have a typo in your project name.","Q_Score":1,"Tags":"python-2.7,google-app-engine","A_Id":50029739,"CreationDate":"2018-04-24T15:18:00.000","Title":"deploying web application on GAE","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I would like to ask if it is possible to make Python 3 a default interpreter on Mac OS 10 when typing python right away from the terminal? If so, can somebody help how to do it? I'm avoiding switching between the environments.\nCheers","AnswerCount":2,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":13084,"Q_Id":50011518,"Users Score":1,"Answer":"You can do that by changing alias, typing in something like $ alias python=python3 in the terminal.\nIf you want the change to persist open ~\/.bash_profile using nano and then add alias python=python3. CTRL+O to save and CTRL+X to close.\nThen type $ source ~.\/bash_profile in the terminal.","Q_Score":3,"Tags":"python,python-3.x,macos","A_Id":50011593,"CreationDate":"2018-04-24T22:23:00.000","Title":"Make Python 3 default on Mac OS?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm trying to install ibm_db driver in Linux for Python. I test the installation using import ibm_db. The installation was successful. When I test using 'import ibm_db' I get the following error: \nImportError: \/usr\/lib\/python2.7\/site-packages\/ibm_db-2.0.3-py2.7-linux-x86_64.egg\/ibm_db.so: undefined symbol: PyUnicodeUCS2_FromObject\nPlease help me to resolve this.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":461,"Q_Id":50062872,"Users Score":0,"Answer":"Please try installing the current version of the ibm_db driver (which at time of writing is 2.0.8a),  which you can do via:\npip install \"ibm_db==2.0.8a\"\nYou need the version of pip that matches your python version.","Q_Score":0,"Tags":"python-2.7,db2","A_Id":50063192,"CreationDate":"2018-04-27T12:55:00.000","Title":"Error installing Python ibm-db driver on Linux","Data Science and Machine Learning":0,"Database and SQL":1,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a Cython-based package which depends on other C++ SO libraries. Those libraries are binary different between Ubuntu (dev) and RedHat (prod). So the SO file generated by Cython has to be different as well. If I use Wheel to package it the file name is same for both environments:\npackage-version-cp27-cp27mu-linux_x86_64.whl\nSo if I upload it to pypi it will conflict with RedHat based distribution of the same package. I have to upload it to pypi because the project is then PEX-ed (via Pants) and PEX tries to download  from pypi and fails if it does not find it with the following exception.\nException caught: 'pex.resolver.Unsatisfiable'\nAny ideas how to resolve it?\nThx.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":211,"Q_Id":50065595,"Users Score":0,"Answer":"I found a solution by using a different PyPi instance. So our DEV Ubuntu environment and PROD RedHat just use two different PyPi sources.\nTo do that I had to make two configurations ~\/.pypic and ~\/.pip\/pip.conf to upload.","Q_Score":0,"Tags":"python,ubuntu,cython,redhat","A_Id":50101049,"CreationDate":"2018-04-27T15:23:00.000","Title":"How to create different Python Wheel distributions for Ubuntu and RedHat","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I tried installing Anaconda in my windows 10 but for using with atom editor. But it only works with anaconda prompt and not with terminal of atom for python","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":860,"Q_Id":50068554,"Users Score":2,"Answer":"First of all have you set the anaconda python path in the system variable\n cause atom wont be able to find the anaconda version of python and will get default python or will break.\nThen to check whether Anaconda is installed properly try opening Anaconda Navigator if no then re install.\nFurther it is not dependent on Atom in any ways possible as it is simply an editor.\nVerify your system settings and then try again.Also see to it that the path must contain the anaconda version of python and not other version.\nAfter adding it to the path you will be able to use it from anywhere on your system.","Q_Score":0,"Tags":"python,anaconda,atom-editor","A_Id":50069680,"CreationDate":"2018-04-27T18:45:00.000","Title":"Anaconda not working with atom terminal for python","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am going to implement a Practical Byzantine Fault Tolerance ( PBFT ).\nHence, I am going to have multiple processes, P0 is going to initialize a round, by sending a first message.\nIs it possible to broadcast a message to all other processes using ZeroMQ? \nWith PUB\/SUB, I need to bind\/connect sockets. But I am going to take the number of processes as arguments, it seems impractical to connect all other ports ( I do not know if this is possible ?! ). I could not write any code since I am stuck in the beginning.\nBasically, if I find the way to connect processes I will do this:\nThe proposer selects a random message m and sends it to all validators.\nUpon reception each validator sends the message to other validators and the proposer.\nIf a validator (or proposer) receives at least 2k messages from the other\nprocesses that are identical to its own it proceeds to the next\nround of the consensus algorithm.\nOne more addition: Processes are going to communicate with each other directly. But connecting to all other processes sockets with REQ\/REP is not clever, though.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":562,"Q_Id":50081460,"Users Score":0,"Answer":"Is it possible to broadcast a message to all other processes using ZeroMQ?\n\nOh sure, it is .\nThis is exactly why all messaging and signalling tools, like ZeroMQ, nanomsg and others, were developed for.\nThe beauty and the trick of PBFT is, that there ought be zero-singular point of defection, ought be there?\nSo any other approach, but the circular-message actually being sent and delivered one-after-another, will not help the PBFT, will it?\nFeel free to sketch the solution, the port-mapping will not be your main issue in this. ZeroMQ can .bind()\/.connect() in a very flexible manner. One may even create an ad-hoc, non-persistent, connectivity setup in a similarly circular-manner, if ports are indeed a scarce resource, so get a bit more courage and go get it done :o)","Q_Score":3,"Tags":"python,zeromq,fault-tolerance","A_Id":50083751,"CreationDate":"2018-04-28T22:03:00.000","Title":"Python ZeroMQ broadcasting messages","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have been trying to deploy my project for approx 1.5 hours but I don't seem to have made any progress. Up to 10 solid minutes pass after I run the \"gcloud app deploy --project [my project name here]\" and nothing ever happens. The console shows that it's attempting to process the command but never progresses to show anything (except that my python which statements failed - I can run Python fine though so I don't that that's an issue). I have tried:\n\nfollowing the quickstart guide (twice to make sure I followed the steps)\nre-ran gcloud components install app-engine-python command\nran the gcloud components update command\n\nI've also spent this time researching as many forum posts as I reasonably could but to no avail. If anyone has advice on how to resolve this I would greatly appreciate the assist.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":377,"Q_Id":50084272,"Users Score":2,"Answer":"Found the solution. For some reason I can't use the command while in the GitBash terminal - I had to use the Windows Command Line. This may seem like a silly mistake, but I hope that it saves someone some time in the future.","Q_Score":0,"Tags":"python,google-app-engine","A_Id":50084297,"CreationDate":"2018-04-29T07:17:00.000","Title":"App Engine - Deploying Stuck With No Progression","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"Code on a Mac uses 2.7 version regardless of \"python.pythonPath\" setting explicitly set to \/usr\/local\/bin\/python3. Selecting interpreter interactively via command palette has no effect either. \nRunning python in the terminal launches 3.6 which should be picked up by the Code with default \"python.pythonPath\" setting, but it is not.\nNo matter what I do Code keeps using 2.7.\nWhat am I missing?","AnswerCount":3,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":1346,"Q_Id":50110691,"Users Score":0,"Answer":"I can't add a comment, but you could change the \"python.pythonPath\" setting from usr\/bin\/local\/python3 to \/usr\/local\/bin\/python3","Q_Score":1,"Tags":"python,python-3.x,visual-studio-code","A_Id":50111958,"CreationDate":"2018-05-01T02:33:00.000","Title":"Unable to select Python interpreter","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Code on a Mac uses 2.7 version regardless of \"python.pythonPath\" setting explicitly set to \/usr\/local\/bin\/python3. Selecting interpreter interactively via command palette has no effect either. \nRunning python in the terminal launches 3.6 which should be picked up by the Code with default \"python.pythonPath\" setting, but it is not.\nNo matter what I do Code keeps using 2.7.\nWhat am I missing?","AnswerCount":3,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":1346,"Q_Id":50110691,"Users Score":0,"Answer":"Since you have multiple versions of python, I suggest you use virtual environments. These define which version of python you use and keeps everything straight. If you used Anaconda to download python, the Anaconda documentation is very clear on how to create and run from a virtual environment. If you didn't use anaconda, Unix has a simple way to define virtual environments.\nI have virtual environments for python 2.7.13 and python 3.6.  I can just activate the appropriate environment depending on which version of python I wish to use. I use this and I'm running VScode on my iMac.","Q_Score":1,"Tags":"python,python-3.x,visual-studio-code","A_Id":50142754,"CreationDate":"2018-05-01T02:33:00.000","Title":"Unable to select Python interpreter","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Could you please help me with the following error? I am trying to deploy a web app to Azure and I encounter the following issue: \n\nEven if by requirements, a newer version of setuptools is installed,\n  the deployment fails with the error:\"  RuntimeError: cryptography\n  requires setuptools 18.5 or newer, please upgrade to a newer version\n  of setuptools\".\n\nThe whole log is as it follows: \n\nCommand: \"D:\\home\\site\\deployments\\tools\\deploy.cmd\" Handling python\n  deployment. Detected requirements.txt.  You can skip Python specific\n  steps with a .skipPythonDeployment file. Detecting Python runtime from\n  site configuration Detected python-3.4 Found compatible virtual\n  environment. Pip install requirements. Downloading\/unpacking\n  setuptools>=18.5 (from -r requirements.txt (line 1)) Requirement\n  already satisfied (use --upgrade to upgrade): Flask==0.12.1 in\n  d:\\home\\site\\wwwroot\\env\\lib\\site-packages (from -r requirements.txt\n  (line 2)) Downloading\/unpacking azure-storage-file==1.1.0 (from -r\n  requirements.txt (line 3))   Downloading\n  azure_storage_file-1.1.0-py2.py3-none-any.whl Downloading\/unpacking\n  azure-storage-common>=1.1.0,<1.2.0 (from azure-storage-file==1.1.0->-r\n  requirements.txt (line 3)) Downloading\/unpacking\n  azure-storage-nspkg>=2.0.0 (from azure-storage-file==1.1.0->-r\n  requirements.txt (line 3))   Downloading\n  azure_storage_nspkg-3.0.0-py2.py3-none-any.whl Downloading\/unpacking\n  azure-common>=1.1.5 (from azure-storage-file==1.1.0->-r\n  requirements.txt (line 3))   Downloading\n  azure_common-1.1.10-py2.py3-none-any.whl Downloading\/unpacking\n  cryptography (from\n  azure-storage-common>=1.1.0,<1.2.0->azure-storage-file==1.1.0->-r\n  requirements.txt (line 3))   Running setup.py\n  (path:D:\\home\\site\\wwwroot\\env\\build\\cryptography\\setup.py) egg_info\n  for package cryptography\n      Traceback (most recent call last):\n        File \"\", line 17, in \n        File \"D:\\home\\site\\wwwroot\\env\\build\\cryptography\\setup.py\", line 28, in \n          \"cryptography requires setuptools 18.5 or newer, please upgrade to a \"\n      RuntimeError: cryptography requires setuptools 18.5 or newer, please upgrade to a newer version of setuptools\n      Complete output from command python setup.py egg_info:\n      Traceback (most recent call last):   File \"\", line 17, in    File\n  \"D:\\home\\site\\wwwroot\\env\\build\\cryptography\\setup.py\", line 28, in\n  \n      \"cryptography requires setuptools 18.5 or newer, please upgrade to a \" RuntimeError: cryptography requires setuptools 18.5 or newer,\n  please upgrade to a newer version of setuptools\n  ---------------------------------------- Cleaning up... Command python setup.py egg_info failed with error code 1 in\n  D:\\home\\site\\wwwroot\\env\\build\\cryptography Storing debug log for\n  failure in D:\\home\\pip\\pip.log An error has occurred during web site\n  deployment. \\r\\nD:\\Program Files\n  (x86)\\SiteExtensions\\Kudu\\73.10426.3381\\bin\\Scripts\\starter.cmd\n\"D:\\home\\site\\deployments\\tools\\deploy.cmd\"\n\nThanks in advance!","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":1123,"Q_Id":50135928,"Users Score":0,"Answer":"You need to upgrade the python module setuptools installed on your target.\nIf you used python3 (it looks to be case from the log), run this command: pip3 install --upgrade setuptools\nIf you are still using python2 then this command pip install --upgrade setuptools.\nIf you do not have permission access then use the flag --user: pip3 install --user --upgrade setuptools","Q_Score":0,"Tags":"python,azure,deployment,setuptools,azure-web-app-service","A_Id":50253268,"CreationDate":"2018-05-02T13:31:00.000","Title":"Error Deployment on Azure","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":1},{"Question":"I am a novice python user and I use Atom to code in python. Sometimes, I use python 'os' module to get the working directory and in some cases, I have to navigate through directory\/folders to get to where I want the code to run. e.g. say my starting working directory is \"C:\\Users\\XYZ\" and I want to change directory to some folder named \"ABC\" in some directory path under D:. Currently, I have to open an explorer window to figure out where the 'ABC' folder is and then copy paste the directory in Atom and swap '\\' with '\\' and use os.chdir function. Is there an easier way or some Atom package where I press the first letter of the folder and it gives me autocomplete suggestions? I tried os.listdir() but copy paste using that is too cumbersome. I know that I can just create my file in that directory to start with but I want to learn if I can navigate through folders the way using autocomplete suggestions.\nAny help would be great.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":479,"Q_Id":50137099,"Users Score":0,"Answer":"This is not exactly what you want but may help you. There is an Atom extension \"platformio-ide-terminal\" which when run will open a regular bash shell at the bottom of your Atom window. Using this you can easily move around your directories using unix commands. Hope this helps some.","Q_Score":0,"Tags":"python,python-3.x,ide,intellisense,atom-editor","A_Id":50142286,"CreationDate":"2018-05-02T14:26:00.000","Title":"Autocomplete directory\/folder path in Atom (for python)","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Is there a way to have a python program react to an opened file?  For example, can I get it to do something when I open a text file or another python file?","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":60,"Q_Id":50142547,"Users Score":0,"Answer":"You can get alerts on create, delete, modify and move of directories \/ files using tools like inotify, fswatch (for OSX) or watchdog. However I'm not aware of a way to get an alert on a file open in the general case. You'd probably need to use lsof, or do what lsof does for you: scan through \/proc\/*\/fs - polling, not an event-driven approach which is what it sounds like you want.","Q_Score":1,"Tags":"python,python-3.x","A_Id":50142769,"CreationDate":"2018-05-02T19:55:00.000","Title":"Can Python 3 react to opened files on my mac?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"You can tell where this is going from the title..\nI work at a small post house, and to replace one of our older Mac Pros, we were looking at building a mid-range PC (doesn't need to do much heavy lifting - not worth the price of a new Mac Pro)..\nThe problem is, we have a number of scripts that we use for footage transcoding and media management, and they were coded for our Mac-exclusive environment..\nThe basic procedure for setting up a new workstation is:\nInstall pip using easy_install\nUse pip to install:\nyoutube_dl\npexpect\nparsedatetime\nXlsxWriter\nInstall MacPorts..  Use MacPorts to install ffmpeg, lftp, and ImageMagick.  From there, install a couple custom in-house scripts (that rely mostly on the preceding dependencies and python 2.7 (via xcode). \nI'm NOT going to ask how to adapt this to PC, since that would be way outside the scope of a single question. My question is, without a strong python developer on-site (the custom scripts were written years ago by someone who's no longer with the company), is it even feasible to adapt the install scripts to a PC environment?  We have a freelance Python developer that we consult for minor script changes and he wasn't sure (his response was \"I would first double check to make sure some of the utilities can even run on windows. I\u2019m not 100% sure they can or not\").  Do any of the utilities jump out as something that would not be adaptable to a Windows environment?\nThanks very much in advance - I know it's a rather broad question.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":34,"Q_Id":50143215,"Users Score":0,"Answer":"If you \"don't need heavy lifting\", why upset your workflow this way?\nIf you are determined to buy a PC, why not run Linux on it rather than Windows?  The setup process you described will be almost exactly the same on a Linux machine except for involving a different package manager instead of MacPorts.  \nCraig\nPS the Python modules you listed are all available via MacPorts.  It would simplify the software management process to install everything that way.","Q_Score":0,"Tags":"python,windows,pip,macports,easy-install","A_Id":50154802,"CreationDate":"2018-05-02T20:39:00.000","Title":"Small Mac-based post house looking to run a Windows box, but we rely on some Python scripts","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I don't think the other questions on stack overflow that sound like this are actually this question. (I did read several of them.)\nI downloaded a module, thinkbayes.py. When I'm in IDLE, typing \"from thinkbayes import pmf\" gives the following.\nTraceback (most recent call last):\n  File \"\", line 1, in \n    from thinkbayes import pmf\nModuleNotFoundError: No module named 'thinkbayes'\nI copied thinkbayes.py to many directories where python is installed, and that didn't help. So, I searched online for this and found recommendations like:\nSET SAVE=%PYTHONPATH%\nSET PYTHONPATH=.\npython scripts\/doit.py\nSET PYTHONPATH=%SAVE%\n(in stack overflow)\nI tried that (and other recommendations) both in IDLE and in the Windows command-line interface. Neither one recognizes those commands. I changed directories to C: -- no improvement.\nWhat am I missing here that everyone else knows? To repeat, I'm trying to get a Python 3 installation to recognize a .py file that I've copied into the 'Scripts' directory, the 'include' directory, etc.\nThanks,\nSakyataksis","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":820,"Q_Id":50143360,"Users Score":0,"Answer":"Do not put a python file in pythonxy\/include, which is for C .h header files.\npythonxy\/scripts is for startup files and support files for startup files.  But this only works if pythonxy\/scripts is on the system PATH.   The installer asks you if you want this.  But this in turn is problematic if you have more than one python version installed.\nOn Windows, downloaded files and packages should generally go in pythonxy\/Lib\/site-packages.  If you use pip to get file xyz, this is where it will put it.  Then when you run pythonxy, import xyz should work.\nNone of this has anything to do with IDLE.","Q_Score":0,"Tags":"python,windows,path,python-idle","A_Id":50147245,"CreationDate":"2018-05-02T20:50:00.000","Title":"IDLE's path, not Windows' path: How do I edit Python's path in MS Windows to include a .py module?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Google Assistant SDK: My user input is always constant, meaning same user command all the time, so instead of asking the user to everytime record a voice commandvia a device microphone, I want to have the user press a button and execute the command by passing a pre-recorded audio file as input. Is that possible with the Google assistant SDK? Preferably in Python as I want to built an API endpoint around it\nAny links, blogs, tutorials, samples etc would be very helful","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":1035,"Q_Id":50156074,"Users Score":0,"Answer":"py -m googlesamples.assistant.grpc.pushtotalk --device-id \"your device id\" --device-model-id \"your device model\" -i \"your_sound_file.wav\"'\nthis will not wait for you to play a file, it will send the file and exeute and exit. but anyways, I had went to a website, can't remember which, but it would generate wav files of whatever you wanted. I did \"turn on the porch light\". Now I have a script that loops infinitely, checks if it can ping my cell phone on my home network, and if it detects its arrival, and it is between 7pm and 7am, it will turn on the porch light for me automatically. The only thing I have a problem with is, I do not need to hear the assistants voice. I wish there was a way to send an arg that muted assistant responses for the current \"conversation\". I use nircmd, copied to system32 folder in windows, to get around this though and I set the volume to 0, then do the assistant thing, then set the volume back to 20%. Works pretty good.","Q_Score":0,"Tags":"python,python-3.x,google-assistant-sdk,google-assist-api","A_Id":67032898,"CreationDate":"2018-05-03T13:18:00.000","Title":"Python: Can you directly pass an audio file as user input command to Google Assistant SDK?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"We are currently using Protocol Buffers as serialization mechanism for kafak message. We are going to move to Avro. We tested Avro Confluent consumer with Schema Registry and according to those tests, Avro consumer is little bit slow compare to protobuff consumer.\nMy question is do we need to manually cash schemas or Python AvroConsumer handle cash it self? \nI'm using confluent_kafka AvroConsumer.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":665,"Q_Id":50168243,"Users Score":1,"Answer":"I had the same problem some time ago, there is additional latency when you're moving from Google protobuf, which is really fast, to something like Avro + Schema Registry. \nYou definitely have the option to cache the schemas manually. However, most decent kafka clients that talk to SchemaRegistry should already do this. At least, Confluent's Java kafka client does this automatically. So, the only time it has to send a request to Schema Registry is when it encounters a schema version it hasn't seen yet.","Q_Score":0,"Tags":"python,apache-kafka,avro,confluent-platform,confluent-schema-registry","A_Id":51750830,"CreationDate":"2018-05-04T06:09:00.000","Title":"Do we need to manually cache schema registry?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am newbie to python and was googling for ages although never found an answer to my question - may be you could help me directing\nI am working on automating of one application deployment which has the part of changing the local server timezone (windows is the platform). Moreover, I am using the Listbox from tkinter to gather the input of the required timezone from user (listbox is filled with common_timezones from pytz).\nI wanted to change it with a python, using pytz and transferring the result to tzutils but never succeeded, as the result of pytz is in Unix format and tzutils accepts 'UTC+'. \nIs there any native fuction in python which could help me in changing the timezone locally or may be way to convert result of pytz to the input format which will be accepted by tzutils? Or I am going some wrong way?","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":320,"Q_Id":50170494,"Users Score":0,"Answer":"Problem is solved, I used powershell call from python script for this. thank you.","Q_Score":0,"Tags":"windows,python-3.x,timezone","A_Id":50175429,"CreationDate":"2018-05-04T08:27:00.000","Title":"Python on Windows - change local timezone","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have Python wheel file: psutil-5.4.5-cp26-none-linux_x86_64.whl\nHow can I list the dependencies this wheel has?","AnswerCount":7,"Available Count":3,"Score":1.0,"is_accepted":false,"ViewCount":20661,"Q_Id":50170588,"Users Score":9,"Answer":"I just tried to unzip (not gunzip) a wheel package I had lying around. The packagename-version.dist-info\/METADATA file contains a list of Requires-Dist: entries that contain the compiled requirements from setup.py.","Q_Score":37,"Tags":"python,python-wheel","A_Id":50208939,"CreationDate":"2018-05-04T08:33:00.000","Title":"List dependencies of Python wheel file","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have Python wheel file: psutil-5.4.5-cp26-none-linux_x86_64.whl\nHow can I list the dependencies this wheel has?","AnswerCount":7,"Available Count":3,"Score":0.1137907297,"is_accepted":false,"ViewCount":20661,"Q_Id":50170588,"Users Score":4,"Answer":"You can install the wheel file in a separate virtual environment and then look which all other packages are installed.\nUse pip freeze command to see all installed packages.","Q_Score":37,"Tags":"python,python-wheel","A_Id":50208857,"CreationDate":"2018-05-04T08:33:00.000","Title":"List dependencies of Python wheel file","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have Python wheel file: psutil-5.4.5-cp26-none-linux_x86_64.whl\nHow can I list the dependencies this wheel has?","AnswerCount":7,"Available Count":3,"Score":0.0285636566,"is_accepted":false,"ViewCount":20661,"Q_Id":50170588,"Users Score":1,"Answer":"I use to install my virtual envs with pipenv that installs pew as a requirement. pew lets you install temporary virual environments that are deleted as you exit those special virtual environments. So...\nMake a new empty virtual environment and activate it on the fly:\npew mktmpenv -p \/usr\/bin\/python3.6\nInstall your package:\npip install somedistro\nSee what are the requirements of your distro (as well as requirements of requirements...):\npip list\nDeactivate and delete the temporary environment.\nexit\nIn addition, temporary virtual environments are very useful at packaging tests.","Q_Score":37,"Tags":"python,python-wheel","A_Id":50308083,"CreationDate":"2018-05-04T08:33:00.000","Title":"List dependencies of Python wheel file","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Sometimes I resort to using ipdb for debugging a Python script, which has a very nice autocomplete feature.\nThe problem is, the script usually runs through a shell pipeline that processes its output (for instance python script.py |& tee \"stdout.txt\").\nTo me it seems like there is no answer to this (either live without autocomplete, or disable the stdout piping).\nMy question is made up of two parts: \n\nIs there any way to have both autocomplete and stdout processing?\nIf not, exactly why not?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":238,"Q_Id":50177948,"Users Score":0,"Answer":"In the end I worked around this by avoiding shell pipes, and writing the output file from Python itself. \nI can watch the file change live using less +F.\nI guess I was asking for too much interactivity from L\/Unix pipes.","Q_Score":2,"Tags":"shell,autocomplete,pipe,ipython,ipdb","A_Id":59560248,"CreationDate":"2018-05-04T15:04:00.000","Title":"Tab completion in ipdb not working when output is processed","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"We have a Java application in our project and what we want is to call some Python script and return results from it. What is the best way to do this?\nWe want to isolate Python execution to avoid affecting Java application at all. Probably, Dockerizing Python is the best solution. I don't know any other way.\nThen, a question is how to call it from Java.\nAs far as I understand there are several ways:\n\nstart some web-server inside Docker which accepts REST calls from Java App and runs Python scripts and returns results to Java via REST too.\nhandle request and response via Docker CLI somehow.\nuse Java Docker API to send REST request to Docker which then converted by Docker to Stdin\/Stdout of Python script inside Docker.\n\nWhat is the most effective and correct way to connect Java App with Python, running inside Docker?","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":1012,"Q_Id":50191768,"Users Score":2,"Answer":"You don\u2019t need docker for this. There are a couple of options, you should choose depending on what your Java application is doing. \n\nIf the Java application is a client - based on swing, weblaunch, or providing UI directly - you will want to turn the python functionality to be wrapped in REST\/HTTP calls. \nIf the Java application is a server\/webapp - executing within Tomcat, JBoss or other application container - you should simply wrap the python scrip inside a exec call. See the Java Runtime and ProcessBuilder API for this purpose.","Q_Score":0,"Tags":"java,python,docker","A_Id":50197429,"CreationDate":"2018-05-05T16:40:00.000","Title":"Calling Python scripts from Java. Should I use Docker?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I'm playing around with ethereum and python and I'm running into some weird behavior I can't make sense of. I'm having trouble understanding how return values work when calling a contract function with the python w3 client. Here's a minimal example which is confusing me in several different ways:\nContract:\n\npragma solidity ^0.4.0;\n\ncontract test {\n    function test(){\n\n    }\n\n    function return_true() public returns (bool) {\n        return true;\n    }\n\n    function return_address() public returns (address) {\n        return 0x111111111111111111111111111111111111111;\n    }\n}\n\nPython unittest code\n\nfrom web3 import Web3, EthereumTesterProvider\nfrom solc import compile_source\nfrom web3.contract import ConciseContract\nimport unittest\nimport os\n\n\ndef get_contract_source(file_name):\n    with open(file_name) as f:\n        return f.read()\n\n\nclass TestContract(unittest.TestCase):\n    CONTRACT_FILE_PATH = \"test.sol\"\n    DEFAULT_PROPOSAL_ADDRESS = \"0x1111111111111111111111111111111111111111\"\n\n    def setUp(self):\n        # copied from https:\/\/github.com\/ethereum\/web3.py\/tree\/1802e0f6c7871d921e6c5f6e43db6bf2ef06d8d1 with MIT licence\n        # has slight modifications to work with this unittest\n        contract_source_code = get_contract_source(self.CONTRACT_FILE_PATH)\n        compiled_sol = compile_source(contract_source_code)  # Compiled source code\n        contract_interface = compiled_sol[':test']\n        # web3.py instance\n        self.w3 = Web3(EthereumTesterProvider())\n        # Instantiate and deploy contract\n        self.contract = self.w3.eth.contract(abi=contract_interface['abi'], bytecode=contract_interface['bin'])\n        # Get transaction hash from deployed contract\n        tx_hash = self.contract.constructor().transact({'from': self.w3.eth.accounts[0]})\n        # Get tx receipt to get contract address\n        tx_receipt = self.w3.eth.getTransactionReceipt(tx_hash)\n        self.contract_address = tx_receipt['contractAddress']\n        # Contract instance in concise mode\n        abi = contract_interface['abi']\n        self.contract_instance = self.w3.eth.contract(address=self.contract_address, abi=abi,\n                                                      ContractFactoryClass=ConciseContract)\n\n    def test_return_true_with_gas(self):\n        # Fails with HexBytes('0xd302f7841b5d7c1b6dcff6fca0cd039666dbd0cba6e8827e72edb4d06bbab38f') != True\n        self.assertEqual(True, self.contract_instance.return_true(transact={\"from\": self.w3.eth.accounts[0]}))\n\n    def test_return_true_no_gas(self):\n        # passes\n        self.assertEqual(True, self.contract_instance.return_true())\n\n    def test_return_address(self):\n        # fails with AssertionError: '0x1111111111111111111111111111111111111111' != '0x0111111111111111111111111111111111111111'\n        self.assertEqual(self.DEFAULT_PROPOSAL_ADDRESS, self.contract_instance.return_address())\n\nI have three methods performing tests on the functions in the contract. In one of them, a non-True value is returned and instead HexBytes are returned. In another, the contract functions returns an address constant but python sees a different value from what's expected. In yet another case I call the return_true contract function without gas and the True constant is seen by python.\n\nWhy does calling return_true with transact={\"from\": self.w3.eth.accounts[0]} cause the return value of the function to be HexBytes(...)?\nWhy does the address returned by return_address differ from what I expect?\n\nI think I have some sort of fundamental misunderstanding of how gas affects function calls.","AnswerCount":1,"Available Count":1,"Score":0.3799489623,"is_accepted":false,"ViewCount":792,"Q_Id":50194364,"Users Score":2,"Answer":"The returned value is the transaction hash on the blockchain. When transacting (i.e., when using \"transact\" rather than \"call\") the blockchain gets modified, and the library you are using returns the transaction hash. During that process you must have paid ether in order to be able to modify the blockchain. However, operating in read-only mode costs no ether at all, so there is no need to specify gas.\nDiscounting the \"0x\" at the beginning, ethereum addresses have a length of 40, but in your test you are using a 39-character-long address, so there is a missing a \"1\" there. Meaning, tests are correct, you have an error in your input.\n\nOfftopic, both return_true and return_address should be marked as view in Solidity, since they are not actually modifying the state. I'm pretty sure you get a warning in remix. Once you do that, there is no need to access both methods using \"transact\" and paying ether, and you can do it using \"call\" for free.\nEDIT\nForgot to mention: in case you need to access the transaction hash after using transact you can do so calling the .hex() method on the returned HexBytes object. That'll give you the transaction hash as a string, which is usually way more useful than as a HexBytes.\nI hope it helps!","Q_Score":0,"Tags":"python,ethereum,solidity,web3","A_Id":58494505,"CreationDate":"2018-05-05T21:56:00.000","Title":"Unintuitive solidity contract return values in ethereum python","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"For python celery.\nI have 2 queues (say q1 and q2) and several tasks for them.\nSome memory-consuming tasks will be drop into q2 and others to q1. And I don't want 2 q2 tasks (memory consuming tasks) executing at the same time. Can I leave some limitations for them to prevent 2 or more workers doing q2 tasks at the same time? Like set concurrency for each queue? How to do that?\nThanks.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":49,"Q_Id":50198622,"Users Score":0,"Answer":"Take a look at asyncio. This package can help you define and manage your concurrent tasks as you wish.","Q_Score":0,"Tags":"python,concurrency,task,celery","A_Id":50198822,"CreationDate":"2018-05-06T10:24:00.000","Title":"How to limit workers doing tasks in a specific queue? [Celery][Python]","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Pipenv seems to work only in the directory where the Pipfile lives. Maybe I'm trying to use it in a way it is not designed for.\nFor example, I installed a tool called \"leo\" (an editor) and no surprise that I will go to many folders and start pipenv run Leo and it will start to install another virtual environment. What's the workaround?","AnswerCount":5,"Available Count":1,"Score":0.0399786803,"is_accepted":false,"ViewCount":10256,"Q_Id":50205311,"Users Score":1,"Answer":"It's really hard to google this but I found the best solution.\nTo easily activate a virtual environment anywhere with pipenv, you can use pew.\nOnce you pip install pew, you can easily do \"pew workon myvenv\".\nPew uses pipenv under the hood and it works on Windows too.","Q_Score":15,"Tags":"python,virtualenv,pipenv","A_Id":50288075,"CreationDate":"2018-05-06T23:05:00.000","Title":"pipenv: only works in a installed folder?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"This one drive me crazy as I try to solve it for 3 days now with no success. \nI have a python script that automate some stuff, one of its main objectives is to run cmd commands whenever the user want this (User want to print something to console) as an example\n\nPyH1,PyH2,i1,i2 = win32process.CreateProcess(None,Command ,None,None,1,\\\n                                             CreationFlag,\\\n                                             None,None,PySTARTUPINFO)\ngive me this error pywintypes.error: (2, 'CreateProcess', 'The system cannot find the file specified.')\nI am Just sending \"echo Hello World\" to the cmd through python command variable in the CreateProcess second argument. \nMy Operating system is Win7(x64)\nPython Version : Python 3.6.4 (v3.6.4:d48eceb, Dec 19 2017, 06:54:40) [MSC v.1900 64 bit (AMD64)]\non win32\nI tried to reinstall Pywin (32 & 64) both didn't work, and I am confused, which file dosen't exist, as I don't supply or need any!! \nI tried to include cmd path in Windows Environment variables with no succss. \nI tried to include a path to notepad instead of my original echo hello world, it works and opened notepad normally, so CreateProcess is not damaged for any reason.\nI hav another Python version on my machine \nPython 2.7.10 (default, May 23 2015, 09:44:00) [MSC v.1500 64 bit (AMD64)] on win32\nWhere should I look, is it some 64\/32 bit issue or more than that!\nI really apprecite help at that one, thank you in advance.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":1191,"Q_Id":50212849,"Users Score":1,"Answer":"Try to pass cmd.exe as first argument to CreateProcess and \/c \"echo Hello world\" as second\nOr leave 1st as None and pass to second full cmd line: cmd.exe \/c \"echo Hello world\"","Q_Score":0,"Tags":"python,pywin32","A_Id":50213148,"CreationDate":"2018-05-07T11:12:00.000","Title":"can't run CMD command through Python win32Process.Create Process","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"This is more of an architectural question. If I should be asking this question elsewhere, please let me know and I shall.\nI have a use-case where I need to run the same python script (could be long-running) multiple times based on demand and pass on different parameters to each of them. The trigger for running the script is external and it should be able to pass on a STRING parameter to the script along with the resource configurations each script requires to run. We plan to start using AWS by next month and I was going through the various options I have. AWS Batch and Fargate both seem like feasible options given my requirements of not having to manage the infrastructure, dynamic spawning of jobs and management of jobs via python SDK. \nThe only problem is that both of these services are not available in India. I need to have my processing servers in India physically. What options do I have? Auto-scaling and Python SDK management (Creation and Deletion of tasks) are my main requirements (preferably containerized).","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":41,"Q_Id":50217591,"Users Score":0,"Answer":"Why are you restricted to India? Often restrictions are due to data retention, in which case just store your data on Indian servers (S3, DynamoDB etc) and then you are able to run your 'program' in another AWS region","Q_Score":0,"Tags":"python,amazon-web-services,containers,autoscaling,serverless","A_Id":50270433,"CreationDate":"2018-05-07T15:22:00.000","Title":"AWS: containarised serverless solutions","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"this is rather a straightforward question, i've tried to find something about it but either im totally out of my mind or it is not so easy to find out, Is there a way to have say: Microservice 1 (in Nodejs) and Microservice 2 (in Python) under the same ApiGateWay (Nodejs Express) ... i made it work using Nodejs (express) as gateWay and 2 Microservices in Nodejs (Cote.js) with no problem at all, but now i need part of the logic in python (Flask) .. what is the best approach to use a second language? i read something about an internal restApi but i could not find any clear example.\nby the way: If Docker helps i can totally use it, don't hesitate about it.","AnswerCount":2,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":1401,"Q_Id":50225125,"Users Score":2,"Answer":"Its a rather usual case to have different microservices use different technologies. However they need an api to communicate with each other. Often that is a rest api. For example Microservice 1 listens on port x to requests. Depending on the requested url path (e.g \/hello-world) it will return a string representation (e.g json) of the requested data.\nDocker can help you with setting the ports of the services and glueing everything together.","Q_Score":1,"Tags":"node.js,python-3.x,docker,microservices","A_Id":50227627,"CreationDate":"2018-05-08T02:57:00.000","Title":"Multiple-language microservice approach","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":1},{"Question":"I'm running a Django project with an virtualenv, I want to get in views the path of running python or of the virtual environment that I'm using\nThe goal is to pass this path to subprocess to execute a script\nThank you","AnswerCount":2,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":108,"Q_Id":50230563,"Users Score":0,"Answer":"The idea of @DanielRoseman was great, I used management.call_command instead of subprocess and it works fine, the correct virtual environement is passed implicitly","Q_Score":2,"Tags":"django,python-3.x,subprocess,virtualenv","A_Id":50253752,"CreationDate":"2018-05-08T09:41:00.000","Title":"Get virtualenv or python path in views","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":1},{"Question":"I'm running a Django project with an virtualenv, I want to get in views the path of running python or of the virtual environment that I'm using\nThe goal is to pass this path to subprocess to execute a script\nThank you","AnswerCount":2,"Available Count":2,"Score":0.0996679946,"is_accepted":false,"ViewCount":108,"Q_Id":50230563,"Users Score":1,"Answer":"Have you tried request.META? \nI found out some useful information there.\n(I'm using pyenv now and I found PATH, PYENV_DIR, PYENV_ROOT, PYENV_VIRTUAL_ENV, VIRTUAL_ENV and so on.)","Q_Score":2,"Tags":"django,python-3.x,subprocess,virtualenv","A_Id":50231575,"CreationDate":"2018-05-08T09:41:00.000","Title":"Get virtualenv or python path in views","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":1},{"Question":"I know how to run a python script as a background process, but is there any way to compile a python script into exe file using pyinstaller or other tools so it could have no console or window ?","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":427,"Q_Id":50231913,"Users Score":0,"Answer":"If you want to run it in background without \"console and \"window\" you have to run it as a service.","Q_Score":0,"Tags":"python,compilation","A_Id":50232373,"CreationDate":"2018-05-08T10:55:00.000","Title":"How to \"compile\" a python script to an \"exe\" file in a way it would be run as background process?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"We have a service running on Tornado, it is written asynchronously. I suspect that somewhere in the code there is a blocking call that hurts performance.\nIs there a way in Tornado to find this code section \/ function call? \nOr can I find code that holds the IOLoop longer than X ms?\nThanks\nAlex","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":211,"Q_Id":50257066,"Users Score":3,"Answer":"In Python 3+ and Tornado 5+, set the environment variable PYTHONASYNCIODEBUG=1. In older versions of either Tornado or Python, call IOLoop.current().set_blocking_log_threshold(0.5).\nEither way, this will cause a message to be logged whenever a call blocks for more than half a second.","Q_Score":2,"Tags":"python,tornado","A_Id":50257492,"CreationDate":"2018-05-09T15:31:00.000","Title":"How can I find a blocking call inside Tornado webserver?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Perhaps this is a broad question, but I haven't found an answer elsewhere, so here goes.\nThe Python script I'm writing needs to run constantly (in a perfect world, I recognize this may not be exactly possible) on a deployed device. I've already dedicated time to adding \"try...except\" statements throughout so that, should an issue arise, the script will recover and continue to work.\nThe issue is that I'm not sure I can (nor should) handle every single possible exception that may be thrown. As such, I've decided it may be better to allow the script to die and to use systemd to restart it.\nThe three options:\n\nMaking no attempt to handle any exception, and just allowing systemd to restart it whenever it dies.\nMeticulously creating handlers for every possible exception to guarantee that, short of loss of power, interpreter bug, or heat death of the universe, the script will always run.\nA mix of the two -- making an effort to prevent crashes in some cases while allowing them in others and letting systemd restart the script.\n\nThe third choice seems the most reasonable to me. So the question is this: What factors should be considered when optimizing between \"crash-proof\" code and allowing a crash and restart by systemd?\nFor some more application specific information: there is a small but noticeable overhead involved with starting the script, the main portion will run between 50 to 100 times per second, it is not \"mission critical\" in that there will be no death\/damage in the event of failure (just some data loss), and I already expect intermittent issues with the network it will be on.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":47,"Q_Id":50262750,"Users Score":1,"Answer":"All known exceptional cases should be handled. Any undefined behavior is a potential security issue. \nAs you suggest, it is also prudent to plan for unknown exceptions. Perhaps there's also a small memory leak that will also cause the application to crash even when it's running correctly. So, it's still prudent to have systemd automatically restart it if it fails, even when all expected failure modes have been handled.","Q_Score":0,"Tags":"python,exception-handling,crash,systemd","A_Id":50263853,"CreationDate":"2018-05-09T22:08:00.000","Title":"\"Crash-proofing\" script vs.using systemd to guarantee near-constant operation","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm trying to run Apache Airflow's webserver from a virtualenv on a Redhat machine, with some configuration options from a Gunicorn config file. Gunicorn and Airflow are both installed in the virtualenv. The command airflow webserver starts Airflow's webserver and the Gunicorn server. The config file has options to make sure Gunicorn uses\/accepts TLSv1.2 only, as well as a list of ciphers to use. \nThe Gunicorn config file is gunicorn.py. This file is referenced through an environment variable GUNICORN_CMD_ARGS=\"--config=\/path\/to\/gunicorn.py ...\" in .bashrc. This variable also sets a couple of other variables in addition to --config. However, when I run the airflow webserver command, the options in GUNICORN_CMD_ARGS are never applied. \nSeeing as how Gunicorn is not called from command line, but instead by Airflow, I'm assuming this is why the GUNICORN_CMD_ARGS environment variable is not read, but I'm not sure and I'm new to both technologies...\nTL;DR:\nIs there another way to set up Gunicorn to automatically reference a config file, without the GUNICORN_CMD_ARGS environment variable? \nHere's what I'm using:\n\ngunicorn 19.8.1\napache-airflow 1.9.0\npython 2.7.5","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":2243,"Q_Id":50264760,"Users Score":1,"Answer":"When Gunicorn is called by Airflow, it uses ~\\airflow\\www\\gunicorn_config.py as its config file.","Q_Score":1,"Tags":"python,virtualenv,config,gunicorn,airflow","A_Id":50646740,"CreationDate":"2018-05-10T02:52:00.000","Title":"Apache Airflow: Gunicorn Configuration File Not Being Read?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"Without considering an option to open a notepad first and saving it with the extension \".py\" , how to create a new \".py\" file in a corresponding directory using cmd ?\nNote : As a beginner python learner I request you to kindly ignore if this was a silly question ...","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":42,"Q_Id":50266364,"Users Score":0,"Answer":"on windows:\nC:\\Users\\username\\Desktop> echo \"the script\" > hello_world.py\nNote: replace the username with your actual user account.","Q_Score":1,"Tags":"python,python-3.x","A_Id":50266620,"CreationDate":"2018-05-10T05:55:00.000","Title":"How to create a new text document from scratch and save it as .py file using cmd?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am working one file python project.\nI integrated google-cloud-API for realtime speech streaming and recognition.\nIt works with python aaa.py command well.\nNow I need windows build file(.exe), so I used pyinstaller program and I got aaa.exe file successfully.\nBut I got this error while running speech streaming by using Google cloud API.\n\n[Errno 2] No such file or directory:\n  'D:\\AI\\ai\\dist\\AAA\\google\\cloud\\gapic\\speech\\v1\\speech_client_config.json'\n\nSo I copied this speech_client_config.json file in needed path, after that I got below error again.\n\nException  in 'grpc._cython.cygrpc.ssl_roots_override_callback'\n  ignored E0511 01:13:14.320000000  3108\n  src\/core\/lib\/security\/security_connector\/security _connector.cc:1170]\n  assertion failed: pem_root_certs != nullptr\n\nThen, I can not find solution to get working version with google-cloud API.\nI am using python version 2.7.14\nI need your friendly help.\nThanks.","AnswerCount":3,"Available Count":1,"Score":0.2605204458,"is_accepted":false,"ViewCount":909,"Q_Id":50282890,"Users Score":4,"Answer":"I had the same problem. If you are willing to distribute roots.pem with your executable (just search for the file - it should be buried deep within the installation directory of grpcio), I had luck fixing this by setting GRPC_DEFAULT_SSL_ROOTS_FILE_PATH environment variable to the full path of this roots.pem file.","Q_Score":1,"Tags":"python,python-2.7,google-cloud-platform,pyinstaller","A_Id":53107197,"CreationDate":"2018-05-10T23:30:00.000","Title":"Got errors, while running exe file built with pyinstaller and Google Cloud API integration in python","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I installed python3 to my my late 2014 iMac through brew.sh and my terminal is still defaulting to an older version of python unless I specifically prompt it with the command python3.  Is there any way I can fix this so that the terminal just automatically defaults to python3, without me having to type in python3 every single time?  I really need to run django, and the fact that my system is still defaulting to python 2.7 is really getting in the way.  Is there perhaps any way I can uninstall the older version of python?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":14,"Q_Id":50299956,"Users Score":0,"Answer":"Yes, you should set up virtual environments for python 2.7.13 and python 3.6. when you want to run python2, just activate the python 2 environments. Same for python3.\nIf you installed python using Anaconda, there are instructions in the Anaconda documentation for creating virtual environments.\nIf you did not use Anaconda, you can find instructions for creating virtual environments by googling on 'virtual environment python' and there are many hits.\nI would advise against deleting any version of python. Macs come with a version of python installed that it uses and should not be removed.","Q_Score":0,"Tags":"python-3.x,macos,installation","A_Id":50302596,"CreationDate":"2018-05-11T20:39:00.000","Title":"Python 3 installation","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":1},{"Question":"Basically, it is a multi-threaded crawler program, which uses requests mainly. After running the program for a few hours, I keep getting the error \"Too many open files\".\nBy running: lsof -p pid, I saw a huge number of entries like below:\npython  75452 xxx 396u  a_inode    0,11        0    8121 [eventpoll]\nI cannot figure out what it is and how to trace back to the problem.\nPreviously, I tried to have it running in Windows and never seen this error.\nAny idea how to continue investigating this issue? thanks.","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":528,"Q_Id":50300407,"Users Score":0,"Answer":"I have figured out that it is caused by Gevent. After replacing gevent with multi-thread, everything is just OK. \nHowever, I still don't know what's wrong with gevent, which keeps opening new files(eventpoll).","Q_Score":0,"Tags":"python,ubuntu,memory-leaks,python-requests","A_Id":50348191,"CreationDate":"2018-05-11T21:19:00.000","Title":"python Ubuntu: too many open files [eventpoll]","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"The default version of python installed on my mac is python 2. I also have python 3 installed but can't install python 2.\nI'd like to configure Hyrdrogen on Atom to run my script using python 3 instead.\nDoes anybody know how to do this?","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":4266,"Q_Id":50304519,"Users Score":0,"Answer":"I used jupyter kernelspec list and I found 2 kernels available, one for python2 and another for python3\nSo I pasted python3 kernel folder in the same directory where python2 ken=rnel is installed and removed python2 kernel using 'rm -rf python2'","Q_Score":3,"Tags":"python,python-3.x,jupyter,atom-editor,hydrogen","A_Id":56453522,"CreationDate":"2018-05-12T09:01:00.000","Title":"Using Hydrogen with Python 3","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am using Ubuntu 16.04 . Where is the python 3 installation directory ?\nRunning \"whereis python3\" in terminal gives me:\n\npython3: \/usr\/bin\/python3.5m-config  \/usr\/bin\/python3 \n  \/usr\/bin\/python3.5m \/usr\/bin\/python3.5-config  \/usr\/bin\/python3.5 \n  \/usr\/lib\/python3  \/usr\/lib\/python3.5  \/etc\/python3  \/etc\/python3.5\n  \/usr\/local\/lib\/python3.5   \/usr\/include\/python3.5m \n  \/usr\/include\/python3.5  \/usr\/share\/python3 \n  \/usr\/share\/man\/man1\/python3.1.gz\n\nAlso where is the intrepreter i.e the python 3 executable ? And how would I add this path to Pycharm ?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":10136,"Q_Id":50304901,"Users Score":5,"Answer":"you can try this :\nwhich python3","Q_Score":3,"Tags":"python,python-3.x","A_Id":50304923,"CreationDate":"2018-05-12T09:48:00.000","Title":"Python 3 install location","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a python3 script that reads non ascii text files, makes modifications and writes them back. I can launch that script from Atom with Package\u2192Script\u2192Run Script menu command and python3 complains that input text files are not Ascii:\nUnicodeDecodeError: 'ascii' codec can't decode byte 0xc3 in position 37: ordinal not in range(128)\nBut when I copy the very command used by Atom (the first line in the output pane) into the terminal, then everything works as expected and all the files are processed correctly.\nHow can I tell Atom to not restrict python3 to ascii?","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":435,"Q_Id":50308426,"Users Score":1,"Answer":"The problem is that when launched from Atom's script package, python does not inherit the system context.\nOne solution is to create a profile from menu Packages\u2192Script\u2192Configure script for which the environment variable field reads for example LANG=fr_FR.UTF-8, what is important is the UTF-8 part.","Q_Score":0,"Tags":"python-3.x,atom-editor,non-ascii-characters","A_Id":50313900,"CreationDate":"2018-05-12T16:30:00.000","Title":"configure python3 in Atom for non ascii files","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I want to make access from remote ubuntu server to local machine because I have multiple files in this machine and I want to transfer it periodically (every minute) to server how can I do that using python","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":312,"Q_Id":50315821,"Users Score":0,"Answer":"You can easily transfer files between local and remote or between two remote servers. If both servers are Linux-based and require to transfer multiple files and folder using single command, however, you need to follow up below steps:\n\nUser from one remote server should have access to another remote server to corresponding directory you want to transfer the file.\n\nYou might need to create a policy or group and assign to server list to that group\nwhich you want to access and assign the user to that group so 2 different remote\nserver can talk to each other.\n\nRun the following scp command:-\n\n\n  scp [options] username1@source_host:directory1\/filename1 \n  username2@destination_host:directory2\/filename2","Q_Score":0,"Tags":"python","A_Id":68788882,"CreationDate":"2018-05-13T11:51:00.000","Title":"transfer files between local machine and remote server","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I want to compile python3 from source so I followed the instructions. \nHowever, during the make command I get the error\n.\/Modules\/zlibmodule.c:10:18: fatal error: zlib.h: No such file or directory\nHow do I solve this without having to install zlib as I do not have root access. Is there a way to skip this file while compilation?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":580,"Q_Id":50334983,"Users Score":0,"Answer":"You can try and use python-dev instead, it includes header files, a static library and development tools for building Python modules, extending the Python interpreter or embedding Python in applications. To install this package, enter:\nFor Python version 3.x+\n$ sudo apt-get install python3-dev","Q_Score":1,"Tags":"makefile,python-3.6,zlib","A_Id":50335420,"CreationDate":"2018-05-14T16:27:00.000","Title":"Compiling Python3.6 gives fatal error: zlib.h: No such file or directory","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I basically want a workflow that goes like this:\nI'm working on a script and run into some issues so I:\n\nMove the script to the interactive console (shift+alt+e on Mac)\nRun a few queries against my variables to figure things out. This step is over when I find a line of code that works.\nUse a keyboard shortcut to add it to the end of the file I have open.\nRepeat as necessary until I feel good about just editing the file directly again.\n\nOptions I'm aware of (that I don't care for)\n\nScroll up, copy, paste.\nUse shortcut to open up history panel.  Select line, copy, close panel, click on script, paste.\n\nI feel it would be a lot smoother for my workflow if I could just hit some key combo and BAM! the last line of code I executed is just put at the bottom of the current file.\nCan it be done?  Anyone have some insight?","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":212,"Q_Id":50339145,"Users Score":1,"Answer":"If you've just typed a statement, hit enter, seen that it looks right, and have an empty prompt waiting, you can:\n\nPress the up arrow key to bring back the last statement\nPress Cmd+A to select the whole statement\nPress Cmd+C to copy\n\nIf the whole statement fits on a single line, you can skip step 2: in general if nothing is selected then Cmd+C copies the whole line at the cursor.\nThe prompt >>> or In[x] will not be copied.\nYou still have to click in the editor to paste, and I don't see a way around that. But at least for the copying you can save on some mouse movement.","Q_Score":0,"Tags":"python,pycharm,interactive","A_Id":50339399,"CreationDate":"2018-05-14T21:17:00.000","Title":"Move last command in PyCharm interactive shell to script","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"How can I run command prompt in Atom Editor? Do I need to install any package for the same? I could not find any videos or links regarding this issue.","AnswerCount":2,"Available Count":2,"Score":0.0996679946,"is_accepted":false,"ViewCount":30297,"Q_Id":50357944,"Users Score":1,"Answer":"There are 2 packages that I use to open a terminal window in Atom. They are 'platformio-ide-terminal' and Termination. Load either one of these and the name will appear under the package menu. Selecting either one will allow you to open a terminal window in bottom third of Atom window.","Q_Score":7,"Tags":"python-3.x,cmd,atom-editor","A_Id":50384946,"CreationDate":"2018-05-15T19:35:00.000","Title":"How to open command prompt in Atom editor?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"How can I run command prompt in Atom Editor? Do I need to install any package for the same? I could not find any videos or links regarding this issue.","AnswerCount":2,"Available Count":2,"Score":1.0,"is_accepted":false,"ViewCount":30297,"Q_Id":50357944,"Users Score":10,"Answer":"Go to File -> Settings -> Install\nSearch for package -> platformio-ide-terminal\nAfter installation of this package\nGo to Packages tab in a menu bar where you can see all the packages installed\nclick on platformio-ide-terminal -> New Terminal [Now you will get the terminal window]","Q_Score":7,"Tags":"python-3.x,cmd,atom-editor","A_Id":54021755,"CreationDate":"2018-05-15T19:35:00.000","Title":"How to open command prompt in Atom editor?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I want to write an application which is portable.\nWith \"portable\" I mean that it can be used to access these storages:\n\namazon s3\ngoogle cloud storage\nEucalyptus Storage\n\nThe software should be developed using Python.\nI am unsure how to start, since I could not find a library which supports all three storages.","AnswerCount":3,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":225,"Q_Id":50364766,"Users Score":3,"Answer":"You can use boto3 for accessing any services of Amazon.","Q_Score":7,"Tags":"python,amazon-s3,google-cloud-storage,portability","A_Id":50364799,"CreationDate":"2018-05-16T07:28:00.000","Title":"Portable application: s3 and Google cloud storage","Data Science and Machine Learning":0,"Database and SQL":1,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"How do I turn my python turtle script to .exe? I tried py2exe and it did execute my script but the cmd showed up for like 1 milisecond. I think it is because I am using turtle graphics instead of normal python script. Is there any way to turn my turtle program into .exe?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":819,"Q_Id":50370233,"Users Score":1,"Answer":"Use done() or exitonclick() for the last command","Q_Score":0,"Tags":"python,python-3.x,py2exe,turtle-graphics","A_Id":50370355,"CreationDate":"2018-05-16T11:53:00.000","Title":"How to turn Python Turtle to .exe","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am currently working with IBMi. I want an automatic mail after completing few jobs for confirmation. How can I achieve this? I can run Python in my system.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":321,"Q_Id":50372456,"Users Score":3,"Answer":"IBM has built in commands depending on your OS release.  They do require setting up the IBM SMTP server.  SNDSMTPEMM and SNDDST are the most used.\nThere are also third party products like my MAILTOOL software (www.bvstools.com\/mailtool.html) that makes interacting with cloud servers like Office 365 and Gmail much easier than then IBM SMTP server.\nPHP may also have some built in email capabilities as well as python.  But if you're looking for a command line interface after running jobs the first two are probably your best bet, depending on if you want to set up the IBM SMTP server or not.","Q_Score":1,"Tags":"python-3.x,ibm-midrange","A_Id":50372734,"CreationDate":"2018-05-16T13:37:00.000","Title":"How to automate mail in IBM i system","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am currently developing a terminal tool which analyse the output of an command. \nI write the tool in python.\nNow I would like to start my tool as an argument within every command, example: python program.py -analyse\nIn this case, python program.py is the command and I would like to start my own project anaylse.py with the argument -analyse which analyse the output from the project and writes its own output to a file. Now my question:\nHow do I get to start my own program analyse.py from the argument -analyse and how can I catch and read the output from python program.py?","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":28,"Q_Id":50395613,"Users Score":0,"Answer":"Adding -analyse as an argument will pass it to program.py.  I don't think that is what you are looking for.  I think you are looking for python program.py | python analyse.py.  Then just read the output from stdin.\nThrow #!\/usr\/bin\/python at the top of analyse.py and change the permissions to executable to make it simpler yet: python program.py | analyse.py","Q_Score":0,"Tags":"python,linux,shell,terminal,command","A_Id":50396474,"CreationDate":"2018-05-17T15:45:00.000","Title":"Start own termianl tool as an argument of an command","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I was trying to install Hyperledger Sawtooth as per below link but unlike the supported 16.04 version of Ubuntu, I'm using Ubuntu 18.04 LTS that was released earlier this month. Could you please share thoughts on how I can resolve this issue?\nWarm Regards,\nRishi\nRishi@Explorer-Ubuntu:~$ sudo apt-get install -y sawtooth\nReading package lists... Done\nBuilding dependency tree       \nReading state information... Done\nSome packages could not be installed. This may mean that you have\nrequested an impossible situation or if you are using the unstable\ndistribution that some required packages have not yet been created\nor been moved out of Incoming.\nThe following information may help to resolve the situation:\n\nThe following packages have unmet dependencies:\n sawtooth : Depends: python3-sawtooth-cli but it is not going to be installed\n            Depends: python3-sawtooth-intkey but it is not going to be installed\n            Depends: python3-sawtooth-poet-cli but it is not going to be installed\n            Depends: python3-sawtooth-poet-core but it is not going to be installed\n            Depends: python3-sawtooth-poet-families but it is not going to be installed\n            Depends: python3-sawtooth-poet-simulator but it is not going to be installed\n            Depends: python3-sawtooth-rest-api but it is not going to be installed\n            Depends: python3-sawtooth-sdk but it is not going to be installed\n            Depends: python3-sawtooth-settings but it is not going to be installed\n            Depends: python3-sawtooth-signing but it is not going to be installed\n            Depends: python3-sawtooth-validator but it is not going to be installed\n            Depends: python3-sawtooth-xo but it is not going to be installed\nE: Unable to correct problems, you have held broken packages.\nRishi@Explorer-Ubuntu:~$ python3 --version\nPython 3.6.5","AnswerCount":4,"Available Count":1,"Score":0.049958375,"is_accepted":false,"ViewCount":1819,"Q_Id":50396715,"Users Score":1,"Answer":"It seems like Ubuntu 18.04 is not yet supported. Let us wait for Hyperledger to support it.\n\nandroid@baymax:~$ .\/prereqs-ubuntu.sh\nError: Ubuntu bionic is not supported","Q_Score":2,"Tags":"python-3.x,ubuntu,hyperledger,ubuntu-18.04,hyperledger-sawtooth","A_Id":50453538,"CreationDate":"2018-05-17T16:50:00.000","Title":"Hyperledger Sawtooth Install problems on Ubuntu 18.04 LTS","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a web application build out of Django version 2.0.1\nA user uploads a file, and based on the content, there are tasks which are executed in a serial fashion. After execution the results are shown to the user. Some of the tasks are independent of each other. \nI want to execute the independent tasks in parallel. I tried using multiprocessing within views.py but there are some errors thrown when the processes are spawned. These tasks analyse some information and write to a file. The files are then combined to show the results to the user.\nThese tasks cannot be done asynchronous as the results produced needs to be shown to the user waiting. So I have dropped the idea of using Celery as recommended in other discussions. \nAnyone's suggestions would be helpful.\nThanks\nError got\nThis was the error we gotTraceback (most recent call last):\n  C:\\Users\\idea\\AppData\\Local\\Enthought\\Canopy\\edm\\envs\\python\\lib\\multiprocessing\\spawn.py\", line 106, in spawn_main\n    exitcode = _main(fd)\n  File \"C:\\Users\\idea\\AppData\\Local\\Enthought\\Canopy\\edm\\envs\\python\\lib\\multiprocessing\\spawn.py\", line 116, in _main\n    self = pickle.load(from_parent)\n  File \"G:\\work\\gitrepo\\suprath-github\\smartdata\\ssd\\FinalPlots\\uploads\\core\\views.py\", line 6, in \n    from uploads.core.models import Document\n  File \"G:\\work\\gitrepo\\suprath-github\\smartdata\\ssd\\FinalPlots\\uploads\\core\\models.py\", line 7, in \n    class Document(models.Model):\n  File \"C:\\Users\\idea\\AppData\\Local\\Enthought\\Canopy\\edm\\envs\\python\\lib\\site-packages\\django\\db\\models\\base.py\", line 100, in new\n    app_config = apps.get_containing_app_config(module)\n  File \"C:\\Users\\idea\\AppData\\Local\\Enthought\\Canopy\\edm\\envs\\python\\lib\\site-packages\\django\\apps\\registry.py\", line 244, in get_containing_app_config\n    self.check_apps_ready()\n  File \"C:\\Users\\idea\\AppData\\Local\\Enthought\\Canopy\\edm\\envs\\python\\lib\\site-packages\\django\\apps\\registry.py\", line 127, in check_apps_ready\n    raise AppRegistryNotReady(\"Apps aren't loaded yet.\")\ndjango.core.exceptions.AppRegistryNotReady: Apps aren't loaded yet.\nTraceback (most recent call last):","AnswerCount":2,"Available Count":2,"Score":0.1973753202,"is_accepted":false,"ViewCount":643,"Q_Id":50405413,"Users Score":2,"Answer":"These tasks cannot be done asynchronous as the results produced needs to be shown to the user waiting\n\nThat doesn't mean you can't use an async queue (celery or other). We have a very similar use case and do use celery to run the tasks. The tasks (part parallel, part serial) store their progress in redis, and the frontend polls to get the current state and display progress to the user, then when the whole process is done (either successfuly or not) we display the result (or errors).","Q_Score":1,"Tags":"python,django,python-multiprocessing","A_Id":50406016,"CreationDate":"2018-05-18T06:52:00.000","Title":"Django: running a few tasks in parallel","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I have a web application build out of Django version 2.0.1\nA user uploads a file, and based on the content, there are tasks which are executed in a serial fashion. After execution the results are shown to the user. Some of the tasks are independent of each other. \nI want to execute the independent tasks in parallel. I tried using multiprocessing within views.py but there are some errors thrown when the processes are spawned. These tasks analyse some information and write to a file. The files are then combined to show the results to the user.\nThese tasks cannot be done asynchronous as the results produced needs to be shown to the user waiting. So I have dropped the idea of using Celery as recommended in other discussions. \nAnyone's suggestions would be helpful.\nThanks\nError got\nThis was the error we gotTraceback (most recent call last):\n  C:\\Users\\idea\\AppData\\Local\\Enthought\\Canopy\\edm\\envs\\python\\lib\\multiprocessing\\spawn.py\", line 106, in spawn_main\n    exitcode = _main(fd)\n  File \"C:\\Users\\idea\\AppData\\Local\\Enthought\\Canopy\\edm\\envs\\python\\lib\\multiprocessing\\spawn.py\", line 116, in _main\n    self = pickle.load(from_parent)\n  File \"G:\\work\\gitrepo\\suprath-github\\smartdata\\ssd\\FinalPlots\\uploads\\core\\views.py\", line 6, in \n    from uploads.core.models import Document\n  File \"G:\\work\\gitrepo\\suprath-github\\smartdata\\ssd\\FinalPlots\\uploads\\core\\models.py\", line 7, in \n    class Document(models.Model):\n  File \"C:\\Users\\idea\\AppData\\Local\\Enthought\\Canopy\\edm\\envs\\python\\lib\\site-packages\\django\\db\\models\\base.py\", line 100, in new\n    app_config = apps.get_containing_app_config(module)\n  File \"C:\\Users\\idea\\AppData\\Local\\Enthought\\Canopy\\edm\\envs\\python\\lib\\site-packages\\django\\apps\\registry.py\", line 244, in get_containing_app_config\n    self.check_apps_ready()\n  File \"C:\\Users\\idea\\AppData\\Local\\Enthought\\Canopy\\edm\\envs\\python\\lib\\site-packages\\django\\apps\\registry.py\", line 127, in check_apps_ready\n    raise AppRegistryNotReady(\"Apps aren't loaded yet.\")\ndjango.core.exceptions.AppRegistryNotReady: Apps aren't loaded yet.\nTraceback (most recent call last):","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":643,"Q_Id":50405413,"Users Score":0,"Answer":"I agree with the solution provided by @bruno desthuillieres, however, you can implement some socket solution to reach back to the user.\nSince polling from user may have huge performance impacts, the socket solution will ideal for this case.","Q_Score":1,"Tags":"python,django,python-multiprocessing","A_Id":50420302,"CreationDate":"2018-05-18T06:52:00.000","Title":"Django: running a few tasks in parallel","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I installed a specific version of python with pyenv. When typed pyenv version in terminal, i see 3.5.0 (set by \/Users\/lcherukuri\/.python-version). But when I typed python3, I got python3 command not found. How to fix this? pip3 is Also not found","AnswerCount":4,"Available Count":1,"Score":0.049958375,"is_accepted":false,"ViewCount":14202,"Q_Id":50417434,"Users Score":1,"Answer":"I had the python3 in path. I also executed pyenv global 2.x.x 3.x.x. But I still got the same error.\nWhat eventually worked for me is executing this line in the project root (with whichever version replacing 3.X.X)\npyenv shell 3.X.X\nNote: This sets the shell specific python version so it's not really a solution to the problem posted. Just a workaround to get python3 working.","Q_Score":9,"Tags":"python,pip,pyenv","A_Id":64914310,"CreationDate":"2018-05-18T18:39:00.000","Title":"python3 command not found after installing python with pyenv","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to fix this FFMPEG command to record audio.\nI have tried using the parts recommended on the official stackoverflow site but they didn't work\nOrignal Command\nffmpeg_stream = '\/usr\/bin\/ffmpeg -f x11grab -s 1280x720 -r 24 -i :%d+nomouse -c:v libx264 -preset superfast -pix_fmt yuv420p -s 1280x720 -threads 0 -f flv \"%s\"' % (xvfb.new_display, info['destination'])\nCommand with attempted audio\nffmpeg_stream = '\/usr\/bin\/ffmpeg -f x11grab -s 1280x720 -r 24 -i :%d+nomouse -c:v libx264 -preset superfast -pix_fmt yuv420p -s 1280x720 -threads 0 -f alsa -ac 2 -i hw:0 -f flv \"%s\"' % (xvfb.new_display, info['destination'])","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":217,"Q_Id":50421185,"Users Score":0,"Answer":"FFmpeg expects a specific arrangement in command line: all inputs first followed by outputs.\nSo,\nffmpeg_stream = '\/usr\/bin\/ffmpeg -f x11grab -video_size 1280x720 -framerate 24 -i :%d+nomouse -f alsa -channels 2 -i hw:0 -c:v libx264 -preset superfast -pix_fmt yuv420p -f flv \"%s\"' % (xvfb.new_display, info['destination']","Q_Score":0,"Tags":"python,ffmpeg","A_Id":50422511,"CreationDate":"2018-05-19T02:13:00.000","Title":"How to fix this FFMPEG command to record audio as well?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"After spark installation 2.3 and setting the following env variables in .bashrc (using gitbash)\n\nHADOOP_HOME\nSPARK_HOME\nPYSPARK_PYTHON\nJDK_HOME\n\nexecuting $SPARK_HOME\/bin\/spark-submit is displaying the following error.\n\nError: Could not find or load main class org.apache.spark.launcher.Main\n\nI did some research checking in stackoverflow and other sites, but could not figure out the problem.\nExecution environment\n\nWindows 10 Enterprise\nSpark version - 2.3\nPython version - 3.6.4\n\nCan you please provide some pointers?","AnswerCount":3,"Available Count":3,"Score":0.2605204458,"is_accepted":false,"ViewCount":10707,"Q_Id":50435286,"Users Score":4,"Answer":"I had that error message. It probably may have several root causes but this how I investigated and solved the problem (on linux): \n\ninstead of launching spark-submit, try using bash -x spark-submit to see which line fails.\ndo that process several times ( since spark-submit calls nested scripts ) until you find the underlying process called : in my case something like : \n\n\/usr\/lib\/jvm\/java-8-openjdk-amd64\/jre\/bin\/java -cp '\/opt\/spark-2.2.0-bin-hadoop2.7\/conf\/:\/opt\/spark-2.2.0-bin-hadoop2.7\/jars\/*' -Xmx1g org.apache.spark.deploy.SparkSubmit --class org.apache.spark.repl.Main --name 'Spark shell' spark-shell\nSo, spark-submit launches a java process and can't find the org.apache.spark.launcher.Main class using the files in \/opt\/spark-2.2.0-bin-hadoop2.7\/jars\/* (see the -cp option above). I did an ls in this jars folder and counted 4 files instead of the whole spark distrib (~200 files).\nIt was probably a problem during the installation process. So I reinstalled spark, checked the jar folder and it worked like a charm.\nSo, you should:\n\ncheck the java command (cp option)\ncheck your jars folder ( does it contain ths at least all the spark-*.jar ?)\n\nHope it helps.","Q_Score":3,"Tags":"python,apache-spark,windows-10","A_Id":50588237,"CreationDate":"2018-05-20T13:23:00.000","Title":"Spark installation - Error: Could not find or load main class org.apache.spark.launcher.Main","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"After spark installation 2.3 and setting the following env variables in .bashrc (using gitbash)\n\nHADOOP_HOME\nSPARK_HOME\nPYSPARK_PYTHON\nJDK_HOME\n\nexecuting $SPARK_HOME\/bin\/spark-submit is displaying the following error.\n\nError: Could not find or load main class org.apache.spark.launcher.Main\n\nI did some research checking in stackoverflow and other sites, but could not figure out the problem.\nExecution environment\n\nWindows 10 Enterprise\nSpark version - 2.3\nPython version - 3.6.4\n\nCan you please provide some pointers?","AnswerCount":3,"Available Count":3,"Score":0.0,"is_accepted":false,"ViewCount":10707,"Q_Id":50435286,"Users Score":0,"Answer":"Check Spark home directory contained all folder and files(xml, jars etc.) otherwise install Spark.\nCheck your JAVA_HOME and SPARK_HOME environment variable are set in your .bashrc file, try setting the below:\n\n\nexport JAVA_HOME=\/usr\/lib\/jvm\/java-8-openjdk-amd64\/\n\n\nexport SPARK_HOME=\/home\/ubuntu-username\/spark-2.4.8-bin-hadoop2.6\/\n\nOr wherever your spark is downloaded to\n\nexport SPARK_HOME=\/home\/Downloads\/spark-2.4.8-bin-hadoop2.6\/\n\nonce done, save your .bash and run bash command on terminal or restart the shell and try spark-shell","Q_Score":3,"Tags":"python,apache-spark,windows-10","A_Id":68046423,"CreationDate":"2018-05-20T13:23:00.000","Title":"Spark installation - Error: Could not find or load main class org.apache.spark.launcher.Main","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"After spark installation 2.3 and setting the following env variables in .bashrc (using gitbash)\n\nHADOOP_HOME\nSPARK_HOME\nPYSPARK_PYTHON\nJDK_HOME\n\nexecuting $SPARK_HOME\/bin\/spark-submit is displaying the following error.\n\nError: Could not find or load main class org.apache.spark.launcher.Main\n\nI did some research checking in stackoverflow and other sites, but could not figure out the problem.\nExecution environment\n\nWindows 10 Enterprise\nSpark version - 2.3\nPython version - 3.6.4\n\nCan you please provide some pointers?","AnswerCount":3,"Available Count":3,"Score":0.0,"is_accepted":false,"ViewCount":10707,"Q_Id":50435286,"Users Score":0,"Answer":"Verify below steps :\n\nspark-launcher_*.jar is present at $SPARK_HOME\/jars folder?\nexplode spark-launcher_*.jar to verify if you have Main.class or not.\n\nIf above is true then you may be running spark-submit on windows OS using cygwin terminal.\nTry using spark-submit.cmd instead also cygwin parses the drives like \/c\/ and this will not work in windows so its important to provide the absolute path for the env variables by qualifying it with 'C:\/' and not '\/c\/'.","Q_Score":3,"Tags":"python,apache-spark,windows-10","A_Id":69961052,"CreationDate":"2018-05-20T13:23:00.000","Title":"Spark installation - Error: Could not find or load main class org.apache.spark.launcher.Main","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Odroid running Ubuntu Mate 16.04 and ROS Kinetic. I have wiringPi2 installed for accessing the GPIO pins. I am able to use the GPIO pins through a Python script, but they require sudo access. I have a ROS node (written in Python) in which I want to access the GPIO pin data and publish to a topic. But, I am not able to do so, because wiringPi2 required sudo access, and ROS is not defined in root.\nI have tried using wiringPiSetupSys() function which does not require sudo access, but that does not work i.e. I am not able to get the GPIO pin data without sudo access.\nAll the solutions to similar problems for Raspberry Pi platform don't seem to work for Odroid.\nThanks","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":315,"Q_Id":50443037,"Users Score":0,"Answer":"Unfortunately, I could not find a fix to the problem with the exact specifications mentioned. However, when I tested the same code on a Raspberry Pi 3 with Raspbian, it works correctly. \nSo, I have concluded that the issue lies in the OS used i.e. Ubuntu Mate 16.04. \nSo, a solution might be to use Raspbian on Odroid itself. I am yet to test whether that works out.\nUpdate : Raspbian doesn't exist as such for Odroid, so some other work around might be required.","Q_Score":0,"Tags":"python,ros,gpio,odroid,wiringpi","A_Id":50580997,"CreationDate":"2018-05-21T06:17:00.000","Title":"Odroid GPIO pins in ROS without sudo access","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am using Azure SDK for python to create resource using python script.After giving the required credentials like CLIENT_ID,TENANT_ID,CLIENT_SECRET,SUBSCRIPTION_ID..It throws a error message like\n\n\"msrestazure.azure_exceptions.CloudError: \n  Azure Error: AuthorizationFailed\n  Message: The client 'CLIENT_ID' with object id 'OBJECT_ID' does not have authorization to perform action 'Microsoft.Resources\/subscriptions\/resourcegroups\/read' over scope ''.\"\n\n(I am using azure in free trial type of subscription)","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":1517,"Q_Id":50446620,"Users Score":0,"Answer":"There needs to be a service principal(SP) associated with the application. Also, to assign a role to SP you need to be an 'owner' or the Azure portal does not show you that option if you are a 'contributor' in UI.","Q_Score":0,"Tags":"python,azure,azure-active-directory,azure-sdk-python","A_Id":53051636,"CreationDate":"2018-05-21T10:15:00.000","Title":"Azure Error: AuthorizationFailed","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am using raspberry pi to get sensor data as csv files, I wanted to upload these files in mongodb atlas, but the mongodb shell required is +3.4 but the one in raspberry is 2.4.\nI thought about a solution, that I send these csv files to windows then import from there.\nIs there a command line to send csv file from raspberry to windows using python ?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":30,"Q_Id":50453231,"Users Score":0,"Answer":"Use scp to copy from raspberry pi machine  to windows machine (if you are using linux distro on raspberry pi)","Q_Score":0,"Tags":"python,mongodb,raspberry-pi,cloud","A_Id":50453645,"CreationDate":"2018-05-21T16:45:00.000","Title":"Send csl file from raspberry to windows","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm testing Apache superset Dashboards, It s a great tool.\nI added an external Database source (Oracle), and I created nice Dashboards very easily.\nI would like to see my Dashboards updated regularly and automatically (3 times a day) in superset.\nBut my Dashboards are not updated.\nI mean when a row is inserted into the Oracle Tables, if I refresh the Dashboard, I cannot view the new data in the Dashboard.\nWhat is the best way to do it ?\n=> Is there a solution \/ an option to force the Datasource to be automatically updated regularly ? in a frequency ? What is the parameter \/ option ? \n=> is there a solution to import in batch csv files (for instance in python), then this operation will update the Dashboard ?\n=> other way ?\nIf you have examples to share... :-)\nMy environment: \nSuperset is Installed on ubuntu 16.04 and Python 2.7.12.\nOracle is installed on another Linux server.\nI connect from  google chrome to Superset.\nMany thanks for your help","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":1509,"Q_Id":50472282,"Users Score":0,"Answer":"You could set the auto-refresh interval for a dashboard if you click on the arrow next to the Edit dashboard-button.","Q_Score":1,"Tags":"python,oracle,superset","A_Id":59359358,"CreationDate":"2018-05-22T16:16:00.000","Title":"superset dashboards - dynamic updates","Data Science and Machine Learning":1,"Database and SQL":1,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I'm testing Apache superset Dashboards, It s a great tool.\nI added an external Database source (Oracle), and I created nice Dashboards very easily.\nI would like to see my Dashboards updated regularly and automatically (3 times a day) in superset.\nBut my Dashboards are not updated.\nI mean when a row is inserted into the Oracle Tables, if I refresh the Dashboard, I cannot view the new data in the Dashboard.\nWhat is the best way to do it ?\n=> Is there a solution \/ an option to force the Datasource to be automatically updated regularly ? in a frequency ? What is the parameter \/ option ? \n=> is there a solution to import in batch csv files (for instance in python), then this operation will update the Dashboard ?\n=> other way ?\nIf you have examples to share... :-)\nMy environment: \nSuperset is Installed on ubuntu 16.04 and Python 2.7.12.\nOracle is installed on another Linux server.\nI connect from  google chrome to Superset.\nMany thanks for your help","AnswerCount":2,"Available Count":2,"Score":0.0996679946,"is_accepted":false,"ViewCount":1509,"Q_Id":50472282,"Users Score":1,"Answer":"I just found the origin of my error... :-)\nIn fact I added records in the future (tomorow, the day after, ...)... \nAnd My dashboard was only showing all Records to the today date...\nI inserted a record before, I refreshed and It appeared.\nThanks to having read me...","Q_Score":1,"Tags":"python,oracle,superset","A_Id":50473011,"CreationDate":"2018-05-22T16:16:00.000","Title":"superset dashboards - dynamic updates","Data Science and Machine Learning":1,"Database and SQL":1,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"My task : I cannot speak openly about what the specifics of my task are, but here is an analogy : every two hours, I get a variable number of spoken audio files. Sometimes only 10, sometimes 800 or more. Let's say I have a costly python task to perform on these files, for example Automatic Speech Recognition. I have a Google Intance managed group that can deploy any number of VMs for executing this task.\nThe issue : right now, I'm using Google PubSub. Every two hours, a topic is filled with audio ids. Instances of the managed group can be deployed depending on the size of queue. The problem is, only one worker get all the messages from the PubSub subscription, while the others are not receiving any, perhaps because the queue is not that long (maximum ~1000 messages). This issue is reported in a few cases in the python Google Cloud github, and it is not clear if it is the intended purpose of PubSub, or just a bug.\nHow could I implement the equivalent of a simple serverless task queue in Python and Google Cloud, and can spawn instances based on a given metric, for example the size of the queue ? Is this the intended purpose of PubSub ?\nThanks in advance.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":442,"Q_Id":50484098,"Users Score":1,"Answer":"In App Engine you can create push queues and set rate\/concurrency limits and Google will handle the rest for you. App Engine will scale as needed (e.g. increase Python instances).  \nIf you're outside of App Engine (e.g. GKE), the pubsub Python client library may be pulling many messages at once. We had a hard time controlling this (for google-cloud-pubsub==0.34.0) as well so we ended up writing a small adjustment on top of  google-cloud-pubsub calling SubscriberClient.pull with max_messages set). The server side pubsub API does adhere to max_messages.","Q_Score":0,"Tags":"python-2.7,google-cloud-platform,google-cloud-pubsub","A_Id":50490692,"CreationDate":"2018-05-23T09:01:00.000","Title":"Simple task queue using Google Cloud Platform : issue with Google PubSub","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I have a few .py files that I want to run in a Docker image.\nBut they need the scrapy-splash Docker image to function well. How will I be able to run those .py files in a Docker container or image while also running scrapy-splash? I am planning to run it on a VPS server.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":236,"Q_Id":50489366,"Users Score":0,"Answer":"You have two choices:\n\nRun the python scripts in the entrypoint, after splash. To run splash in background and then execute your scripts you'll need an entrypoint like this:\n\nENTRYPOINT [\"\/bin\/bash\", \"-c\", \"python3 splash <SPLASH OPTIONS> & python3 your_script.py && python3 your_second_script.py\"]\nThis way the container will end after running the scripts.\n\nRun the splash container in detached mode and then execute the scripts with docker exec.","Q_Score":1,"Tags":"python,docker,scrapy,scrapy-splash","A_Id":50495005,"CreationDate":"2018-05-23T13:12:00.000","Title":"How to run multiple Python scripts in a Docker image or container that depends on another image?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I know there is a method where you can call a stored process via the SAS Stored Process Web Application, but I was wondering if there is a method where i can call the stored process server directly.\nThe goal is to call a stored process which delivers data (via the _webout file?) to python, as efficiently as possible. So maybe it could reduce processing time by skipping the SAS Web Application.\nI don't think it is possible with SASPy (seems to be using Workspace servers).\nRegards.","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":461,"Q_Id":50492155,"Users Score":1,"Answer":"There are 2 ways to call a stored process server in code, using the Java libraries and using the .NET libraries.\nPersonally, I have used .NET to create a command line application that calls the stored process and returns the stream to STDOUT.  From Python, you just read that output.  You can replicate this from Java (but the .NET libraries are easier to use).\nThe other method would be to use a library that allows you to call Java from your flavor of Python (or .NET if you are using the MS Python) and integrate it that way.\nIn the end, for most use cases, it is just easier to use the STP Web Application.  You can log in once, store the authorization token, and pass that back, negating the overhead of re-logging in for each call.","Q_Score":2,"Tags":"python,sas,sas-stored-process,saspy","A_Id":50492460,"CreationDate":"2018-05-23T15:25:00.000","Title":"Execute SAS Stored Process with Python","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I'm running python code from notepad ++ with a shortcut \n\u201d C:\\Python27\\Lib\\idlelib\\idle.bat -r \"$(FULL_CURRENT_PATH)\"\nwhen it runs it pops up in the middle for the screen.\nHow do I specify where it should pop up? I want to put it in the top right corner of the screen.\nI would also like to be able to specify how big the size of the python shell should be.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":291,"Q_Id":50514178,"Users Score":0,"Answer":"For initial shell and editor size, open Options => Configure IDLE => General tab.  Find Initial Window Size and set the height and width in lines and characters.\nThere is no setting for initial position, as it would be a bad idea to have all windows open in exactly the same position.  Better to let the OS cascade them.\nOn the other hand, initial position of the first window would be useful.  For your use, a command line option, say -x pixels_from left, -y pixels from top, would work.  But most people either use the IDLE editor for .py files or link the python shell to other editors, and do not explicitly use a command line.  So I will consider adding Initial Position of First Window to the config dialog.","Q_Score":0,"Tags":"python,notepad++,python-idle","A_Id":50537600,"CreationDate":"2018-05-24T16:33:00.000","Title":"launching Python from notepad ++ specify location and size of window","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I want to  install python 3.5 in linux that has   python 3.4 \nvia virtualenv or any other mean.\nsince the system version is 3.4 ,I don't want to upgrade it so the system don't crash .","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":176,"Q_Id":50515699,"Users Score":0,"Answer":"Using sudo apt-get install package python3 should install the latest version of Python, and remove the older one.","Q_Score":0,"Tags":"linux,python-3.x,virtualenv","A_Id":50515738,"CreationDate":"2018-05-24T18:13:00.000","Title":"How to install python3.5 or 3.6 in linux that has python 3.4","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Setup\n\nI am running on windows 10\nHave python 3.6 and Java 8\n\ndescription\nI have a Java program which calls and passes an argument to a python program and then receives its output using system commands and cmd. \nQuestion\nHow do I convert it into a single exe file that is the user can run it without installing java(jdk or jre)  and python. \nBoth are a part of my system variable \nThank you","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":3780,"Q_Id":50539030,"Users Score":0,"Answer":"Use pyinstaller to package the python file in a exe.\nThen in the java program replace xyz.py with xyz.exe\nUse JarToExe to convert the jar into a Windows .exe file.\n\nThis way you would have two exe files but the user would not need to install java or python","Q_Score":1,"Tags":"java,python,integration,executable-jar","A_Id":50539385,"CreationDate":"2018-05-26T03:21:00.000","Title":"Converting a jar file to exe file","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I need to debug celery task to see whether it is working properly or not, So I put some print statements inside tasks.py. While running the project I have observed that task successfully runs but doesn't print anything on the console. How can I debug the celery task.","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":3323,"Q_Id":50544020,"Users Score":3,"Answer":"When Celery actually does the work, tasks are being handled by different Python processes. Depending on how you have things configured, those separate processes might have no access to your console. Instead, they will write to Celery's log file (which can be configured in various ways). Find that file, and you'll see print output from your tasks.\nAll of that assumes that you have indeed restarted the Celery workers, as suggested by the comment from Gaurav Tomer.","Q_Score":3,"Tags":"python,django,celery","A_Id":50545722,"CreationDate":"2018-05-26T14:57:00.000","Title":"print statement inside celery task not working","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Just started using Ubuntu on Windows and was impressed with what it could interact with that was Windows things, files and some programs, etc. but I was wondering if anyone has tried or knew more about the possibility of setting up a virtual environment for python that could be used by both windows and the Linux subsystem. Ideally my thought process would be to have the venv that I could install packages to from either a windows pip command or a Linux pip command. Would this work?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":884,"Q_Id":50558538,"Users Score":1,"Answer":"Not exactly a 100% solution, but I have found a way to do this with the IDEs that I use. In Jetbrains software you can set up an ssh interpreter. You can set up a localhost ssh in your WSL and use that python environment. This also works with clion.","Q_Score":1,"Tags":"windows,python-3.x,windows-subsystem-for-linux,python-venv","A_Id":50780467,"CreationDate":"2018-05-28T02:54:00.000","Title":"Python Venv with Windows Linux Subsystem","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"In Python, I can open a file with f= open(<filename>,<permissions>). This returns an object f which I can write to using f.write(<some data>).\nIf, at this point, I access the original final (eg with cat from a terminal), it appears empty: Python stored the data I wrote to the object f and not the actual on-disk file. If I then call f.close(), the data in f is persisted to the on-disk file (and I can access it from other programs).\nI assume data is buffered to improve latency. However, what happens if the buffered data grows a lot? Will Python initiate a write? If so, details on the internals (what influences the buffer size? is the disk I\/O handled within Python or by another program\/thread? is there a chance Python will just hang during the write?) would be much appreciated.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":431,"Q_Id":50566484,"Users Score":1,"Answer":"The general subject of I\/O buffering has been treated many times (including in questions linked from the comments).  But to answer your specific questions:\n\nBy default, when writing to a terminal (\u201cthe screen\u201d), a newline causes the text to be flushed up through it.  For all files, the buffer is flushed each time it fills.  (Large single writes might flush any existing buffer contents and then bypass it.)\nThe buffer has a fixed size and is allocated before any data is written; Python\u00a03 doesn\u2019t use stdio, so it chooses its own buffer sizes.  (A few kB is typical.)\nThe \u201cdisk I\/O\u201d (really kernel I\/O, which is distinguishable only in certain special circumstances like network\/power failure) happens within whatever Python write triggers the flush.\nYes, it can hang, if the file is a pipe to a busy process, a socket over a slow network, a special device, or even a regular file mounted from a remote machine.","Q_Score":1,"Tags":"python,python-3.x,io,cpython,disk-io","A_Id":50568224,"CreationDate":"2018-05-28T12:28:00.000","Title":"When is a write to disk triggered?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I use celery for doing snmp requests with easysnmp library which have a C interface.\nThe problem is lots of time is being wasted on I\/O. I know that I should use eventlet or gevent in this kind of situations, but I don't know how to handle patching a third party library when it uses C extensions.","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":283,"Q_Id":50569140,"Users Score":1,"Answer":"Eventlet and gevent can't monkey-patch C code.\nYou can offload blocking calls to OS threads with eventlet.tpool.execute(library.io_func)","Q_Score":0,"Tags":"python,celery,gevent,eventlet","A_Id":50585353,"CreationDate":"2018-05-28T15:00:00.000","Title":"using c extension library with gevent","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Can a login\/ authentication page for a Google app engine (python)  web application be created, without using the Google identity platform (but possibly a platform common for users having emails on other domains)?\nNote: Other email address domains not other social media applications.","AnswerCount":3,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":346,"Q_Id":50582119,"Users Score":0,"Answer":"Google AppEngine is a generic platform and you can implement any authentication option that supports web. For example Facebook Connect, Linked In, GitHub, etc.\nRefer to a specific authentication platform documentation for implementation details.","Q_Score":1,"Tags":"google-app-engine,google-oauth,openid,google-app-engine-python,google-openid","A_Id":50582453,"CreationDate":"2018-05-29T10:29:00.000","Title":"On Google app engine web applications, what are the authentication options other than Google identity platforms?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I have two containers Auth and Frontend. I have managed to get both the containers working independently, I need to establish the link between the two to send and receive HTTP requests.\nGenerally, the connections are made in angular like http:\/\/localhost:3000\/auth\/.\nNote: Both are in different deployments and services.\nShould I be using Ingress or Nginx?","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":391,"Q_Id":50582556,"Users Score":0,"Answer":"service will do the job, you just need to replace localhost with service name.","Q_Score":1,"Tags":"python,angular,docker,kubernetes","A_Id":50584666,"CreationDate":"2018-05-29T10:52:00.000","Title":"Kubernetes - Configuring Angular to Work with a Backend API","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I have two containers Auth and Frontend. I have managed to get both the containers working independently, I need to establish the link between the two to send and receive HTTP requests.\nGenerally, the connections are made in angular like http:\/\/localhost:3000\/auth\/.\nNote: Both are in different deployments and services.\nShould I be using Ingress or Nginx?","AnswerCount":2,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":391,"Q_Id":50582556,"Users Score":0,"Answer":"If your Frontend angular application, needs to connect to the Auth application an the two run on different networks, then just use the IP of your host running the Auth container. If your app requires load balancing, security or you just want to add another level of abstraction and control you may use a proxy like Nginx.","Q_Score":1,"Tags":"python,angular,docker,kubernetes","A_Id":50586256,"CreationDate":"2018-05-29T10:52:00.000","Title":"Kubernetes - Configuring Angular to Work with a Backend API","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"Getting bored with the traditional cmd on windows, so wanted to build one myself. Any tutorial, library, etc would help.\nThanks in advance! :)","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":3790,"Q_Id":50585963,"Users Score":3,"Answer":"The shell in the sense of the CLI command interpretor (which are bash or cmd.exe) can be OS independant. The window holding it will have to either depend on a GUI framework (and could be more less OS independant) or directly use an special OS facility. For example on Windows executable can be tagged as GUI processes and have to provide a Windows interface or as console processes. In that latter case, the system automatically provides them with a console system object (which is erroneously called cmd windows) connected to the Stdin, Stdout and Stderr streams.\nIn Unix or Linux, you can find a number of terminal emulators (the xterm family and derivatives like konsole) that by default host the standard shell of the user but can host any other command interpretor.\nThe interpretor will be easy to write in Python - even if a parser like PLY could help - , and will still be easy to install in a console on terminal emulator. If you need to build a GUI to host it, you will have to use a Python GUI framework like tkinter (standard), PyQt, wxWindows, PyGTK, Kivy, etc.","Q_Score":1,"Tags":"python,python-3.x,shell,terminal,terminal-emulator","A_Id":50586463,"CreationDate":"2018-05-29T13:45:00.000","Title":"How to create a terminal emulator in Python","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I try to install python package python-Levenshtein using:\n\npython setup.py install\n\nBut I return an error:\n\nerror: [WinError 3] The system cannot find the path specified: 'C:\\Program Files (x86)\\Microsoft SDKs\\Windows\\v8.1\\lib'\n\nThen,I use \n\npip install python-Levenshtein\n\nbut it returns the same error.I try to install other python packages(i.e. jieba),it works!I don't know why I can't install python-Levenshtein.\nMy OS is 64-bit,and python3.6 is 32-bit.Is there any influence?\nCan anyone help me?","AnswerCount":2,"Available Count":2,"Score":0.0996679946,"is_accepted":false,"ViewCount":3530,"Q_Id":50595210,"Users Score":1,"Answer":"The package is probably relying on some dependency that you don't have installed. I ran into a similar issue with another package and solved using an anaconda environment (it solved the dependencies problems). Maybe you should try to install it using anaconda?\nOr try installing the Windows SDK, but it will use some GBs of disk space.","Q_Score":1,"Tags":"python,installation,levenshtein-distance","A_Id":50595294,"CreationDate":"2018-05-30T01:37:00.000","Title":"python setup.py install error [WinError 3] The system cannot find the path specified","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I try to install python package python-Levenshtein using:\n\npython setup.py install\n\nBut I return an error:\n\nerror: [WinError 3] The system cannot find the path specified: 'C:\\Program Files (x86)\\Microsoft SDKs\\Windows\\v8.1\\lib'\n\nThen,I use \n\npip install python-Levenshtein\n\nbut it returns the same error.I try to install other python packages(i.e. jieba),it works!I don't know why I can't install python-Levenshtein.\nMy OS is 64-bit,and python3.6 is 32-bit.Is there any influence?\nCan anyone help me?","AnswerCount":2,"Available Count":2,"Score":0.0996679946,"is_accepted":false,"ViewCount":3530,"Q_Id":50595210,"Users Score":1,"Answer":"There shouldn't be any problem with the python package python-Levenshtein, it probably should be with the path as the error clearly says, please check if such a path exists. Or go to that path first, copy paste that into the cmd followed by 'cd' (Hope you're already aware of that.) Then try installing it. Just might work if you had made some typing error while entering the path.","Q_Score":1,"Tags":"python,installation,levenshtein-distance","A_Id":50595997,"CreationDate":"2018-05-30T01:37:00.000","Title":"python setup.py install error [WinError 3] The system cannot find the path specified","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am looking for a wait to schedule tasks based on the reception of an email. \nMore precisely, I received an email with some attached data every week and I need to add these data into a database (and process some information). Is there a way to do it automatically? \nWould airflow be a good option to do this? I found that airflow can send email but I did not find anything about reading mails. \nI know it is possible to read email and download attached file in python. But what would be the best way to check if a specific email is received (defined by a sender) and process its data as soon as it is received ?","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":912,"Q_Id":50601903,"Users Score":0,"Answer":"You could schedule some BashOperator or PythonOperator that periodically checks new mail and if they find one they start processing it. While I cannot give you any specific library, I am sure there must be a way to read and handle email in Python.","Q_Score":4,"Tags":"python-3.x,email,airflow","A_Id":50606478,"CreationDate":"2018-05-30T10:05:00.000","Title":"airflow : wait to receive email and process data contained in attached file","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am developing the ad-hoc network. I want to get MAC address of remote raspberry using his IP address. \nI am doing this code \nimport sys,os\nos.system ('sudo arp -n 115.0.0.2') \ni am getting all things like hWthype, name of device and Flags Mask, HWaddress but i need only HWaddress \nCan i body help me how I can extract only MAC address of remote raspberry using python code instead of cmd command?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":196,"Q_Id":50631473,"Users Score":0,"Answer":"you should use Grep command an catch MAC address with a regular expression to retrieve the line of the mac address.\nThen use cut command to select only the address.\nPost ifconfig output so we can help you better","Q_Score":0,"Tags":"python-3.x,networking,raspberry-pi3,mac-address","A_Id":50640031,"CreationDate":"2018-05-31T19:27:00.000","Title":"How to get the MAC address of remote raspberry using his ip address using python code","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"After reinstalling anaconda, I set up a new Pycharm project. When I debug one of my python scripts it get this error:\n\npydev debugger: process 12636 is connecting \n  Process finished with exit code -1073741819 (0xC0000005)\n\nThis only happens when I debug. Any advice?  \nFor reference, these are the software versions I am currently using:\n\nPython version: 3.5\n  Pycharm version: 2017.3\n  Anaconda Navigator version:1.8.7","AnswerCount":4,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":2753,"Q_Id":50649827,"Users Score":0,"Answer":"Similar to above I've encountered this with a range of packages with pyCharm--usually closing and opening pyCharm fixes the issue (updating pyCharm version).\nIf that doesn't work, I methodically update all python packages.","Q_Score":5,"Tags":"python,debugging,pycharm,anaconda","A_Id":56296925,"CreationDate":"2018-06-01T19:18:00.000","Title":"Pycharm debugger can't start: finished with exit code -1073741819 (0xC0000005)","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"After reinstalling anaconda, I set up a new Pycharm project. When I debug one of my python scripts it get this error:\n\npydev debugger: process 12636 is connecting \n  Process finished with exit code -1073741819 (0xC0000005)\n\nThis only happens when I debug. Any advice?  \nFor reference, these are the software versions I am currently using:\n\nPython version: 3.5\n  Pycharm version: 2017.3\n  Anaconda Navigator version:1.8.7","AnswerCount":4,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":2753,"Q_Id":50649827,"Users Score":1,"Answer":"Same problem as you Bob.\nHere is my workaround (not a complete fix but it does the job) :\nCopy\/paste the entire sites-packages folder from the anaconda (or miniconda => works for me too) to the default python interpreter and switch to this default python.exe interpreter inside your project (Settings -> Project Interpreter).\nFor example overwrite the folder C:\\Miniconda3\\Lib\\site-packages to C:\\Users\\ YOUR_ACCOUNT\\venv\\Lib\\site-packages\nAfter that run AND debug modes are both available.\nHope this help !","Q_Score":5,"Tags":"python,debugging,pycharm,anaconda","A_Id":50769555,"CreationDate":"2018-06-01T19:18:00.000","Title":"Pycharm debugger can't start: finished with exit code -1073741819 (0xC0000005)","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Trying to figure this out, because there is an inconsistency between when I run the code from Pycharm and from terminal.\nPycharm add automatically the current working directory; so if I add a module that is contained in my CWD, that is not in Pythonpath, it works just fine.\nBut when running from terminal, Python does complain, because my import statements refer to modules that are not reachable, because the CWD is not added to PYTHONPATH (I did verify this printing out the content of the variable, while running from Pycharm and from Terminal).\nSo at this point I am assuming that in my startup code, I need to add to Pythonpath the current directory, or this is not correct? I have no way to tell where the final user may put my code in; I just assume that the whole directory containing all my different modules, is located in a specific place.\nTo be more specific, this is where I am at:\n\nmy CWD when I run from Pycharm is \/apps\/myapp\/logic\/, I run the script after cd in that directory, and I call the script with .\/myscript.py\nThe script has the #!\/usr\/bin\/python3 line as first line, instead of running it with python3 -m myscript.py\nThe error I get, is when loading a module that is either in the same directory of my script (\/apps\/myapp\/logic\/) or one level above (\/apps\/myapp\/); sadly the module load happen before my __main__ is running; so I can't add to sys.path the current directory from which the script run. \nAll these issues are not happening if I just run the script from Pycharm","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":451,"Q_Id":50650521,"Users Score":0,"Answer":"After various trial and error, and thanks to the info that I did get from the comments; I did find 2 ways to solve the issue.\n1) Create a shell script or another python script, which is adding the current directory (where all the files lives), and have no import in this file. Then the script call the script that has the main function.\n2) On the top of the module, right after import sys, add the statement to add the path, in this way the current directory will be added to the PATH and it will be accessible, when the import try to access the module.\nNeither look very nice, but this is all that I was able to find, to solve the issue. Pretty sure there is a more elegant way to do so","Q_Score":0,"Tags":"python","A_Id":50652494,"CreationDate":"2018-06-01T20:20:00.000","Title":"Pycharm run the code adding the current working dir to PYTHONPATH","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have started using Atom recently and for the past few days, I have been searching on how to change the default version used in Atom (The default version is currently python 2.7 but I want to use 3.6). Is there anyone I can change the default path? (I have tried adding a profile to the \"script\" package but it still reverts to python 2.7 when I restart Atom. Any help will be hugely appreciated!! Thank you very much in advance.","AnswerCount":4,"Available Count":4,"Score":0.0,"is_accepted":false,"ViewCount":11411,"Q_Id":50667214,"Users Score":0,"Answer":"I would look in the atom installed plugins in settings.. you can get here by pressing command + shift + p, then searching for settings.\nThe only reason I suggest this is because, plugins is where I installed swift language usage accessibility through a plugin that manages that in atom.\nOther words for plugins on atom would be \"community packages\"\nHope this helps.","Q_Score":3,"Tags":"python,python-3.x,editor,atom-editor","A_Id":50682856,"CreationDate":"2018-06-03T14:02:00.000","Title":"How can I change the default version of Python Used by Atom?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have started using Atom recently and for the past few days, I have been searching on how to change the default version used in Atom (The default version is currently python 2.7 but I want to use 3.6). Is there anyone I can change the default path? (I have tried adding a profile to the \"script\" package but it still reverts to python 2.7 when I restart Atom. Any help will be hugely appreciated!! Thank you very much in advance.","AnswerCount":4,"Available Count":4,"Score":0.0,"is_accepted":false,"ViewCount":11411,"Q_Id":50667214,"Users Score":0,"Answer":"Yes, there is. After starting Atom, open the script you wish to run. Then open command palette and select 'Python: Select interpreter'. A list appears with the available python versions listed. Select the one you want and hit return. Now you can run the script by placing the cursor in the edit window and right-clicking the mouse. A long menu appears and you should choose the 'Run python in the terminal window'. This is towards the bottom of the long menu list. The script will run using the interpreter you selected.","Q_Score":3,"Tags":"python,python-3.x,editor,atom-editor","A_Id":50846354,"CreationDate":"2018-06-03T14:02:00.000","Title":"How can I change the default version of Python Used by Atom?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have started using Atom recently and for the past few days, I have been searching on how to change the default version used in Atom (The default version is currently python 2.7 but I want to use 3.6). Is there anyone I can change the default path? (I have tried adding a profile to the \"script\" package but it still reverts to python 2.7 when I restart Atom. Any help will be hugely appreciated!! Thank you very much in advance.","AnswerCount":4,"Available Count":4,"Score":1.0,"is_accepted":false,"ViewCount":11411,"Q_Id":50667214,"Users Score":10,"Answer":"I am using script 3.18.1 in Atom 1.32.2\nNavigate to Atom (at top left) > Open Preferences > Open Config folder.\nNow, Expand the tree as script > lib > grammars\nOpen python.coffee and change 'python' to 'python3' in both the places in command argument","Q_Score":3,"Tags":"python,python-3.x,editor,atom-editor","A_Id":53507376,"CreationDate":"2018-06-03T14:02:00.000","Title":"How can I change the default version of Python Used by Atom?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have started using Atom recently and for the past few days, I have been searching on how to change the default version used in Atom (The default version is currently python 2.7 but I want to use 3.6). Is there anyone I can change the default path? (I have tried adding a profile to the \"script\" package but it still reverts to python 2.7 when I restart Atom. Any help will be hugely appreciated!! Thank you very much in advance.","AnswerCount":4,"Available Count":4,"Score":0.0,"is_accepted":false,"ViewCount":11411,"Q_Id":50667214,"Users Score":0,"Answer":"I came up with an inelegant solution that may not be universal.  Using platformio-ide-terminal, I simply had to call python3.9 instead of python or python3.  Not sure if that is exactly what you're looking for.","Q_Score":3,"Tags":"python,python-3.x,editor,atom-editor","A_Id":71299879,"CreationDate":"2018-06-03T14:02:00.000","Title":"How can I change the default version of Python Used by Atom?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am using Python IDLE 2.7.8. The IDLE shows \"No Subprocess\" as follow:\nPython 2.7.8 (default, Jun 30 2014, 16:03:49) [MSC v.1500 32 bit (Intel)] on win32\nType \"copyright\", \"credits\" or \"license()\" for more information.\n==== No Subprocess ====\nI could import subprocess module successfully. But how can I switch to \"==== Subprocess ====\" mode? I spend hours but find no way to do that. who could help me please?\nThanks a lot","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":61,"Q_Id":50684074,"Users Score":0,"Answer":"If one starts IDLE with -n, which means \"no subprocess, run user code in the IDLE process\", then it prints \"No Subprocess\" after the rest of the startup header as a reminder that one in not running in normal mode.\nThe way to start in normal 'run user code in a subprocess' mode is to not pass the '-n' flag.  Look at how your are starting IDLE.  It must involve a startup line with '-n' somewhere.","Q_Score":0,"Tags":"python,subprocess,python-idle","A_Id":50688145,"CreationDate":"2018-06-04T15:30:00.000","Title":"how to switch \"process\" on with Python IDLE","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I accidentally installed a wrong version of wxPython (3.0.2.0).\nWhen I try to install the latest wxPython-4.0.1, I get the following error:\n\nFound existing installation: wxPython 3.0.2.0\n  Cannot uninstall 'wxPython'. It is a distutils installed project and thus we cannot accurately determine which files belong to it which would lead to only a partial uninstall.\n\nSo, I searched around a bit and apparently you have to use the uninstaller found within your original wxPython-3.0.2.0 dmg file in order to uninstall it. I did not have the file anymore it seemed, and went through my history to get the exact download and version from Sourceforge (I think!), but when I use the uninstaller, I get the following:\n\n* No wxPython installations found!  *\n\nHow am I able to remove this old version of wxPython?\nI am very new to this, so sorry if this sounds stupid.\nThanks!","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":1068,"Q_Id":50688630,"Users Score":1,"Answer":"As you've discovered wxPython Classic and wxPython Phoenix use different installation strategies. In fact, Classic's approach is quite messy compared to Phoenix's, the uninstallation script was created to help to undo some of that (especially the things left behind by the OSX Installer tool.)\nThe good news however is that you can manually clean up the parts that pip is complaining about. I don't have it installed here any longer to be able to give you exact instructions, but from memory it should be something like this.\n\nIn your Python's site-package folder, (something like \/Library\/Frameworks\/Python.framework\/Versions\/2.7\/lib\/python2.7\/site-packages) remove folders and files starting with wx.\nIn \/usr\/local\/lib remove any folders starting with wxPython\n\nAdditionally, wxPython Phoenix is not required to be installed globally like Classic was. If you use virtualenvs or Python3's venvs then you can install the wheel in them instead of your global Python environment if you prefer.","Q_Score":1,"Tags":"wxpython,uninstallation","A_Id":50733198,"CreationDate":"2018-06-04T20:54:00.000","Title":"Cannot uninstall wxPython 3.0.2.0 (macOS)?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":1,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I managed to succefully install django-allauth and configure my app to allow authentication via Google Oauth2, but when i try to configure GitLab Oauth2 integration it juste fail with the message:\n\nThe redirect URI included is not valid.\n\nI did set \nhttp:\/\/xxx.xxx.xx\/accounts\/gitlab\/login\/callback\/ as Callback url \nThanks!","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":1718,"Q_Id":50696207,"Users Score":0,"Answer":"You need to whitelist the redirect URLs of your app in GitLab.\nAdmin Area -> Applications -> Your Django App -> Callback URL","Q_Score":1,"Tags":"python,django,django-allauth","A_Id":52316520,"CreationDate":"2018-06-05T09:03:00.000","Title":"Using self-hosted GitLab as Oauth Provider","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I have installed XDebug as well as Python Debugger.\nI have written a simple program: print(\"OK\"). \nI was also able to do Ctrl + B and build.\nHowever, all I get in the console is: [Finished in 0.1s] while I would like to see the output as well:\"OK\". \nTools > XDebug has no Run command, nor has it Step In command nor any other command that would help me run my program. \nHow do I recover from this situation, please?","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":61,"Q_Id":50705542,"Users Score":0,"Answer":"def do_stuff():\n    print(\"doin' stuff\")\nHit Ctrl+B\nOutput:\n[Finished in 0.1s]","Q_Score":1,"Tags":"python","A_Id":50715891,"CreationDate":"2018-06-05T17:11:00.000","Title":"Python Sublime and XDebug","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"back then i used to work in linux environment, but in my current work i got bound to using only windows. Everything worked fine eventually but then just recently i got to problem wherein i need to use uwsgi package which is incompatible with windows, so i my solution was to use virtualbox, install ubuntu there and then just run that single standalone module which needs uwsgi and the rest still with windows (each module communicates through HTTP, so they kind of like microservices). Now the thing is all of them depends in google cloud sdk which currently installed in my windows machine (host) so my plan is to move that installation to the shared folder between the guest and host to be able to be used by them, but wondering if it will work? as much as possible i dont like make the guest ubuntu to be bulky that much","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":35,"Q_Id":50716213,"Users Score":0,"Answer":"Sharing the folder of the Cloud SDK installed on the host machine with a guest OS on Virtualbox should be working as long as the required environmental variables (e.g $PATH) are appropriately configured on the guest OS.","Q_Score":0,"Tags":"python,virtualbox,google-cloud-sdk","A_Id":51071550,"CreationDate":"2018-06-06T08:57:00.000","Title":"Is it possible to use google cloud sdk installed in windows host from ubuntu guest?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Using pythonnet to access some dlls from python and the dlls are not able to access the linux directories no matter what owner or permissions are set to.  Just get an access denied message like this.\nAccess to the path '\/tmp\/work' is denied.\nSeems like it should work.  Anyone have a tip on this?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":278,"Q_Id":50732366,"Users Score":1,"Answer":"In using the release build of the .Net dlls it was only giving the vague permission denied error message (checking the return .error variable).  That was not the problem at all although I spend a lot of time trying to fix it.  Per the tip from denfromufa I changed to use the debug build of the .Net dll and it throws a proper exception.  I was missing a reference.  So the lesson for me is it is better to use the debug build of .Net dlls if you run them with pythonnet.","Q_Score":1,"Tags":"python,.net,linux,python.net,pythonnet","A_Id":50827959,"CreationDate":"2018-06-07T03:06:00.000","Title":"pythonnet dll directory access denied","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a project shared by a friend which includes headers that have case conflicts (eg: #include \"xyz.h\" but the actual file is Xyx.h). \nHow should I solve this?  I decided to write a python or bash script to parse all the #include's and then search if they are actually in the directory. Is this a good approach? \nWhich one should I use, python or bash. I think bash would be easier because it can handle files and replace names easier. But will I have to write regular expressions in my bash script?","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":40,"Q_Id":50739241,"Users Score":1,"Answer":"One single bullet proof solution:\n\nchoose a name convention - all lower case is probably the most common one\nrename all include files to their lower case equivalent - do nothing if they are already lower case\nconsistently check all source files and ensure that they actually include the lower case name - this should be done by hand because you do not want to process a litteral string containing #include\n\nThat being said, if the number of files is small, and if files are not too complex, this can possibly be automated. But my opinion is that the gain of time is not worth the development of a tool and the risk of error in it.","Q_Score":0,"Tags":"python,bash,parsing","A_Id":50740386,"CreationDate":"2018-06-07T10:44:00.000","Title":"Find and replace file names to C standard","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I've installed a module with the --target argument and the console entry points are installed at the target in a \/bin directory. Therefore they are not accessible via the command line. Usually they would install to \/usr\/bin.\nI've tried adding --install-option=\"--install-scripts=\/usr\/bin\" but the behaviour doesn't change. \nThe full install command that doesn't install the entry points to \/usr\/bin:\n\/usr\/bin\/pip install my-package-1.0.0-py2-none-any.whl --target \/opt\/myproject\/ --upgrade --install-option=\"--install-scripts=\/usr\/bin\"\nTIA","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":154,"Q_Id":50743951,"Users Score":0,"Answer":"When you use --target you're on your own. Add \/opt\/myproject\/bin to $PATH and \/opt\/myproject\/lib\/pythonX.Y to $PYTHONPATH.","Q_Score":1,"Tags":"python,pip,setuptools","A_Id":50745378,"CreationDate":"2018-06-07T14:35:00.000","Title":"Console entry points not working with the --target argument with pip install","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am getting the following error while deploying the google app engine\nERROR: gcloud crashed (SSLHandshakeError): [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:661)\nIf you would like to report this issue, please run the following command:\n  gcloud feedback\nTo check gcloud for common problems, please run the following command:\n  gcloud info --run-diagnostics\nI am using python 2.7 also tried turning off firewall settings but doesnot help. Any suggestions?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":894,"Q_Id":50747034,"Users Score":1,"Answer":"This is a common network issue seen when there is a networking proxy present on your network or antivirus and similar software that might prevent the connection. \nAs you mentioned the issue was solved when deactivating an antivirus software. If you still want to run the antivirus, you can configure it properly to allow the connection to GCP.","Q_Score":1,"Tags":"google-app-engine,google-cloud-platform,ssl-certificate,google-app-engine-python","A_Id":50756281,"CreationDate":"2018-06-07T17:27:00.000","Title":"ssl handshake error while deploying google app engine","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"Everytime I try to run a django app in terminal using a python manage.py runserver command I get the following error:\nReferenced from: \/Users\/myname\/anaconda\/lib\/python2.7\/site-packages\/_mysql.so\n  Reason: image not found.\nDid you install mysqlclient or MySQL-python?\n\nTo fix it, I just paste\nexport DYLD_LIBRARY_PATH=\/usr\/local\/mysql\/lib\/\n\ninto my terminal. How can I rearrange my files so that I don't have to paste this in every time? I am working on a Mac.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":254,"Q_Id":50751008,"Users Score":2,"Answer":"Assuming you're just using the default terminal, you could put the command in your .bash_profile\/.bashrc by running something like\necho \"export DYLD_LIBRARY_PATH=\/usr\/local\/mysql\/lib\/\" >> ~\/.bash_profile\nSwitching .bash_profile with your equivalent.Then when you start a new terminal it should already be applied. To apply it immediately just run\nsource ~\/.bash_profile","Q_Score":0,"Tags":"python,mysql,django,macos","A_Id":50751138,"CreationDate":"2018-06-07T22:31:00.000","Title":"MySQL and Python - \"image not found\" -- permanent fix?","Data Science and Machine Learning":0,"Database and SQL":1,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I want to check the SD card size in bash or python. Right now I know df can check it when the SD card is mounted or fdisk -l if root is available.\nBut I want to know how to check the SD card size without requiring mounting the card to the file system or requiring the root permission? For example, if the SD card is not mounted and I issue df -h \/dev\/sdc, this will return a wrong size. In python, os.statvfs this function returns the same content as well. I search on stack overflow but did not find a solution yet.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":413,"Q_Id":50769974,"Users Score":0,"Answer":"Well, I found the lsblk -l can do the job. It tells the total size of the partitions.","Q_Score":0,"Tags":"python,linux,bash","A_Id":50802107,"CreationDate":"2018-06-09T00:49:00.000","Title":"how to check the SD card size before mounted and do not require root","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to  import the thing in python that will enable me to copy and past things. It seems to have a problem. I later searched my entire C drive for pyperclip and it seems to be not have it at all. How can I go about fixing this? Or am I not looking in the right area? Here is the error:\n\nimport pyperclip\nTraceback (most recent call last):\nFile \"\", line 1, in \nimport pyperclip\nModuleNotFoundError: No module named 'pyperclip'\n\nBTW I'm on windows 10","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":461,"Q_Id":50777164,"Users Score":0,"Answer":"You seems a new learner for Python. You can try to install that package via pip command. For other problem like how to use pip or which user to run pip, just go to search and solve it by yourself.","Q_Score":0,"Tags":"python,python-3.x,compiler-errors,python-import,pyperclip","A_Id":50777216,"CreationDate":"2018-06-09T18:07:00.000","Title":"Python IDLE seems to be unable to import Pyperclip in python 36?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to  import the thing in python that will enable me to copy and past things. It seems to have a problem. I later searched my entire C drive for pyperclip and it seems to be not have it at all. How can I go about fixing this? Or am I not looking in the right area? Here is the error:\n\nimport pyperclip\nTraceback (most recent call last):\nFile \"\", line 1, in \nimport pyperclip\nModuleNotFoundError: No module named 'pyperclip'\n\nBTW I'm on windows 10","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":461,"Q_Id":50777164,"Users Score":0,"Answer":"So yes you're right. You need to open up cmd prompt. use the cd to change the directory to the one inside Python36\\Scripts. Then run the  command \n    pip install pyperclip","Q_Score":0,"Tags":"python,python-3.x,compiler-errors,python-import,pyperclip","A_Id":50778183,"CreationDate":"2018-06-09T18:07:00.000","Title":"Python IDLE seems to be unable to import Pyperclip in python 36?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have installed docker, and while trying to pull scrapinghub\/splash -  It says \n\"image operating system \"linux\" cannot be used on this platform\". i'm using win 10.\nOther commands and pull requests are working fine.","AnswerCount":3,"Available Count":2,"Score":0.0665680765,"is_accepted":false,"ViewCount":4619,"Q_Id":50786984,"Users Score":1,"Answer":"Open Docker Desktop option-->\nSelect switch to linux container option\nThats all","Q_Score":2,"Tags":"python,docker,splash-screen","A_Id":62139222,"CreationDate":"2018-06-10T18:47:00.000","Title":"Docker - \"image operating system \"linux\" cannot be used on this platform\" while trying to pull splash. from scrapinghub\/splash","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have installed docker, and while trying to pull scrapinghub\/splash -  It says \n\"image operating system \"linux\" cannot be used on this platform\". i'm using win 10.\nOther commands and pull requests are working fine.","AnswerCount":3,"Available Count":2,"Score":1.0,"is_accepted":false,"ViewCount":4619,"Q_Id":50786984,"Users Score":6,"Answer":"Set in Docker Desktop -> Docker Engine tab -> mode \"experimental\": true. It helps me","Q_Score":2,"Tags":"python,docker,splash-screen","A_Id":64938596,"CreationDate":"2018-06-10T18:47:00.000","Title":"Docker - \"image operating system \"linux\" cannot be used on this platform\" while trying to pull splash. from scrapinghub\/splash","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Can someone point me the right direction to where I can sync up a live video and audio stream?\nI know it sound simple but here is my issue: \n\nWe have 2 computers streaming to a single computer across multiple networks (which can be up to hundreds of miles away).\nAll three computers have their system clocks synchronized using NTP\nVideo computer gathers video and streams UDP to the Display computer\nAudio computer gathers audio and also streams to the Display computer\n\nThere is an application which accepts the audio stream.  This application does two things (plays the audio over the speakers and sends network delay information to my application).  I am not privileged to the method which they stream the audio.\nMy application displays the video and two other tasks (which I haven't been able to figure out how to do yet).\n- I need to be able to determine the network delay on the video stream (ideally, it would be great to have a timestamp on the video stream from the Video computer which is related to that system clock so I can compare that timestamp to my own system clock).\n- I also need to delay the video display to allow it to be synced up with the audio.\nEverything I have found assumes that either the audio and video are being streamed from the same computer, or that the audio stream is being done by gstreamer so I could use some sync function.  I am not privileged to the actual audio stream.  I am only given the amount of time the audio was delayed getting there (network delay).\nSo intermittently, I am given a number as the network delay for the audio (example: 250 ms).  I need to be able to determine my own network delay for the video (which I don't know how to do yet).  Then I need to compare to see if the audio delay is more than the video network delay.  Say the video is 100ms ... then I would need to delay the video display by 150ms (which I also don't know how to do).  \nANY HELP is appreciated.  I am trying to pick up where someone else has left off in this design so it hasn't been easy for me to figure this out and move forward.  Also being done in Python ... which further limits the information I have been able to find. Thanks.  \nScott","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":3020,"Q_Id":50807114,"Users Score":0,"Answer":"A typical way to synch audio and video tracks or streams is have a timestamp for each frame or packet, which is relative to the start of the streams.\nThis way you know that no mater how long it took to get to you, the correct audio to match with the video frame which is 20001999 (for example) milliseconds from the start is the audio which is also timestamped as 20001999 milliseconds from the start.\nTrying to synch audio and video based on an estimate of the network delay will be extremely hard as the delay is very unlikely to be constant, especially on any kind of IP network.\nIf you really have no timestamp information available, then you may have to investigate more complex approaches such as 'markers' in the stream metadata or even some intelligent analysis of the audio and video streams to synch on an event in the streams themselves.","Q_Score":0,"Tags":"python,video,udp,gstreamer,ntp","A_Id":50833346,"CreationDate":"2018-06-11T22:56:00.000","Title":"How to sync 2 streams from separate sources","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to install numpy on macOS X but after executing the command pip install numpy I am getting the error:\n\nEnvironment error :[error 13]: permission denied : 'usr\/local\/bin\/f2py\n\nHow do I fix it?","AnswerCount":11,"Available Count":3,"Score":0.0,"is_accepted":false,"ViewCount":298104,"Q_Id":50807507,"Users Score":0,"Answer":"On Windows this has worked for me. From the command line, specify the path to the exe for Python:\n& \"C:\/Program Files (x86)\/Python37-32\/python.exe\" -m pip install --upgrade pip --user","Q_Score":99,"Tags":"python,macos,numpy","A_Id":57720740,"CreationDate":"2018-06-11T23:50:00.000","Title":"Could not install packages due to a \"Environment error :[error 13]: permission denied : 'usr\/local\/bin\/f2py'\"","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to install numpy on macOS X but after executing the command pip install numpy I am getting the error:\n\nEnvironment error :[error 13]: permission denied : 'usr\/local\/bin\/f2py\n\nHow do I fix it?","AnswerCount":11,"Available Count":3,"Score":0.0,"is_accepted":false,"ViewCount":298104,"Q_Id":50807507,"Users Score":0,"Answer":"It is always preferred to use a virtual environment ,Create your virtual environment using :\npython -m venv <name_of_virtualenv>\ngo to your environment directory and activate your environment using below command on windows:\nenv_name\\Scripts\\activate.bat\nthen simply use\npip install package_name","Q_Score":99,"Tags":"python,macos,numpy","A_Id":64059034,"CreationDate":"2018-06-11T23:50:00.000","Title":"Could not install packages due to a \"Environment error :[error 13]: permission denied : 'usr\/local\/bin\/f2py'\"","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to install numpy on macOS X but after executing the command pip install numpy I am getting the error:\n\nEnvironment error :[error 13]: permission denied : 'usr\/local\/bin\/f2py\n\nHow do I fix it?","AnswerCount":11,"Available Count":3,"Score":1.0,"is_accepted":false,"ViewCount":298104,"Q_Id":50807507,"Users Score":9,"Answer":"I too had to face the same problem. This worked for me. Right click and run as admin than run usual command to install. But first run update command to update the pip\npython -m pip install --upgrade pip","Q_Score":99,"Tags":"python,macos,numpy","A_Id":53027283,"CreationDate":"2018-06-11T23:50:00.000","Title":"Could not install packages due to a \"Environment error :[error 13]: permission denied : 'usr\/local\/bin\/f2py'\"","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a python script that records audio from an I2S MEMS microphone, connected to a Raspberry PI 3. \nThis script runs as supposed to, when accessed from the terminal. The problem appears when i run it as a service in the background. \nFrom what i have seen, the problem is that the script as service, has no access to a software_volume i have configured in asoundrc. The strange thing is that i can see this \"device\" in the list of devices using the get_device_info_by_index() function.\nFor audio capturing i use the pyaudio library and for making the script a service i have utilized the supervisor utility.\nAny ideas what the problem might be and how i can make my script to have access to asoundrc when it runs as a service?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":127,"Q_Id":50812469,"Users Score":2,"Answer":"The ~\/.asoundrc file is looked for the home directory of the current user (this is what ~ means).\nPut it into the home directory of the user as which the service runs, or put the definitions into the global ALSA configuration file \/etc\/asound.conf.","Q_Score":1,"Tags":"python,raspbian,audio-recording,alsa","A_Id":50812689,"CreationDate":"2018-06-12T08:22:00.000","Title":"Python script as service has not access to asoundrc configuration file","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"We've recently moved from App Service to App Service Environment on Azure. We need Python 3.6 to run the web API. But we're not able to install the extensions. Are extensions disabled on App service environment. Azure by default offers Python 3.4.1. But few of the libraries need a minimum of 3.6.4 which is available as a extensions. Is there a workaround for this or are we limited to the default Python 3.4.1 available with Azure ?","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":984,"Q_Id":50816456,"Users Score":0,"Answer":"This is indeed possible but took a bit of experimenting. I had to open the Kudu console from a VM which is inside the same VNet as the App Service Environment. From there on, it's a cake walk. You can also configure Web Jobs from the VM which is otherwise not possible from the portal.","Q_Score":0,"Tags":"python,azure,azure-app-service-envrmnt","A_Id":51572844,"CreationDate":"2018-06-12T11:49:00.000","Title":"Extensions not supported on Azure App Service Environment","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":1},{"Question":"What are pros and cons of Fabric and Plumbum python libraries for local\/remote command execution? What are use cases when one library should be used and other is not? What are the differences attention should be drawn to?","AnswerCount":2,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":799,"Q_Id":50816468,"Users Score":3,"Answer":"background and suggested comparison methodology\n(oops it's a dead post)\nBoth tools are fun, allow either local or remote work, but have differences in the things they are supposed to solve, i.e. \"terminology\", and both are basically pretty much obsolete by modern deployment\/automation tooling (like ansible, and many others that chose DSL way, e.g. terraform).\nTheir advantage over more modern ones are lack of \"opinionated\" approach about the \"how\", and more on \"what\".\nSuggested comparison criteria:\n\n\"Pythonness\" vs. \"Shellness\" (i.e. how \"pythonic\" the user code with each is)\nSpecial Capabilities\nROI with 2 types of maintainers of your \"automation\" code (ops vs. devs, let's put \"QA\" as something in between)\n\nFabric (my last work was done at 1.8 take this with a grain of time salt):\n\nmore pythonic, than shellish, this means easy to support by both old tools and new - i.e. editors, IDEs would be easy to setup\nmany many context processors, many decorators, very nice\neasier to adopt by developers, a bit more traction would come from ops people\n\nPlumbum\n\nThe user code can be either pythonic or shellish\n\"shell combinators\" are a killer feature to get senior shell\/perl folk onboard, but it uses dynamic imports, so editors\/IDEs are a bit trickier to setup.\nDue to 1. You will get 'ops' people on board easier, because of mimicking shell constructs in Plumbum, but please install good coding conventions.\n\nEpilogue\nHaving worked with both toolkits (with lots of fun) and then having switched to ansible - I feel confident to claim - both tools are now superseded by ansible.\nyou can do most automation tasks with existing ansible modules, and what you can't - you can write a plugin or module for it (in any language), or just call shell module.\nMy consideration would be this:\n\nif your team of maintainers has good level of programming skills (Esp. in python), as a requirement - you'd be ok with using either fabric, Plumbum (it has more cool hacks ;)) or Ansible.\nif you have multi-level multi-team organization, I would simply bet on Ansible - it has lower learning curve, and allows to grow up easily.\n\nGood day.","Q_Score":4,"Tags":"python,compare,fabric,plumbum","A_Id":51920412,"CreationDate":"2018-06-12T11:49:00.000","Title":"Fabric vs Plumbum: differences, use cases, pros and cons","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"What are pros and cons of Fabric and Plumbum python libraries for local\/remote command execution? What are use cases when one library should be used and other is not? What are the differences attention should be drawn to?","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":799,"Q_Id":50816468,"Users Score":0,"Answer":"They're pretty much the same thing.  The biggest win for fabric over plumbum is the ability to connect to multiple hosts in parallel, which is more or less indispensible when you're working with a non-trivial setup.  fabric also offers a couple of contrib helpers that let you upload jinja templates, upload files, and transfer files back to the local system.  I personally find the fabric api to be far more intuitive for working with remote servers.\nYMMV, of course, but both are geared towards being very close to shell commands.  That said, my team and I are focused on ansible for most configuration \/ deploy flows.  Fabric does offer some power over ansible at the expense of having to roll your own idempotence.","Q_Score":4,"Tags":"python,compare,fabric,plumbum","A_Id":51397324,"CreationDate":"2018-06-12T11:49:00.000","Title":"Fabric vs Plumbum: differences, use cases, pros and cons","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm trying to start a python script via java and send the data via socket back to the java program.\nMy problem is that when I start the python script after the SocketServer is created with Runtime.getRuntime().exec(\"python3 ~\/Documents\/sensor\/sensorADC.py\");\nno connection is established and no data is transmitted.\nBut when I start the script manually via CLI, everything works fine.\nThe timing of the program start shouldn't be the problem, because I already tried different ways and orders.\nThe java program is a javaFx application.\nEDIT: tested in Linux\n2nd Edit:\n    private void startPythonScript () {\n        try {\n            measureProcess = Runtime.getRuntime().exec(\"python3 ~\/Documents\/sensor\/sensorADC.py\")); \n        } catch (IOException e) {\n                e.printStackTrace();\n        }\n    }\nWhat am I missing?\nThank you in advance","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":98,"Q_Id":50821130,"Users Score":0,"Answer":"I \"solved\" it.\nI compiled it with pyinstaller and now it works. Python seems to be the problem here.\nBut I don't know why....\nFor others I compiled it to an executable with pyinstaller --onefile sensor.py","Q_Score":3,"Tags":"java,python","A_Id":50843052,"CreationDate":"2018-06-12T15:46:00.000","Title":"Java start python process","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I have an MVN project and would like to add a Python program in the project. The IDE I am using in Intellij.\n\nI have added the MVN pom file as below:\n\norg.codehaus.mojo\nversions-maven-plugin\n2.1\n\n\n\npython\nsrc\/main\/resources\/pythonlib \n\nPYTHONPATH\n\n\n\n\nAdded the Python plugin\nWhile trying to run from the editor it is asking for Python interpreter:\n\nWhich has 2 radio buttons:\n\nUse SDK of the module\nUse specified interpreter.\n\nIn both the list does not have any Python interpreter. How to have the list display a Python interpreter.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":86,"Q_Id":50835836,"Users Score":0,"Answer":"Added the interpreter at module level in project settings an it worked fine for me. \nProject Settings -> Modules -> Click + an added the python home directory.","Q_Score":1,"Tags":"python,maven,intellij-idea","A_Id":50839568,"CreationDate":"2018-06-13T11:15:00.000","Title":"Intellij - Python interpretor","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I have python 3 file that run a SVN deployment. Basically run \"python3 deploy.py update\" and following things happen:\n\nClose site\nBackup Ignore but secure files\nSVN revert -R .\nSVN update \nTrigger tasks\nOpen site\n\nThat all sounds simple and logical, but for one thought going around my head \"SVN is writing files, including python files and sub module helpers that are trigger the SVN subprocess\" \nI understand that python files are read and processed and only through some tricky reload will python reload. And I understand if SVN change python source then update would only take effect on next run. \nBut question is \"should keep this structure or move file to root and run SVN to be safe side\" \nApplies to GIT or any python changes","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":1449,"Q_Id":50844415,"Users Score":0,"Answer":"From what I know it is safe to change python (i.e. .py) file while python is running, after .pyc file has been created by python (i.e. your situation). You can even remove .py file and run .pyc just fine. \nOn the other hand SVN revert -R . is dangerous here as it would attempt removing .pyc files, so either screw up your python or fail by itself.","Q_Score":0,"Tags":"python,git,svn,deployment","A_Id":50844763,"CreationDate":"2018-06-13T18:58:00.000","Title":"Safe to change python file during run time?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am working with an instrument that provided the shared libraries to use with C\/C++. As my group is working with Python I wrote a ctypes wrapper using the provided DLLs (loading them with windll) and everything was working right because we were testing the code using Windows.\nThe final machine in which I will need to run the code is OS X, and I think I've hit a wall since the libraries the manufacturer provided don't include .so files, only .dll's.\nIs there any way I can write a wrapper for using this instrument (and its provided DLL files) on Mac OS X without having access to the source code? Or would my best option be finish the program in Windows, create an executable and then running it with Wine?","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":1049,"Q_Id":50883180,"Users Score":0,"Answer":"There's not enough info to know what a good solution would be, but I can throw an idea or two out there. The device you have probably requires drivers, which are OS specific (in which case it is highly unlikely Wine solutions will work for you). If the device can be connected to a Windows box, but the user application runs on Mac OS, then there are some good possibilities.  You could create a Windows service that opens a network socket to send\/receive data on which the user app running on Mac OS can access.  Or, instead of a Windows service, a simple Windows console app could open the socket.  The Windows service (or console app) would access the device connected to the Windows system via whatever API the manufacturer provides in their libraries while it takes commands from the socket connection and sends data back.","Q_Score":3,"Tags":"python,macos,ctypes","A_Id":51274363,"CreationDate":"2018-06-15T22:00:00.000","Title":"Calling DLLs using python's ctypes in OS X","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"When I run this simple code:\nfrom flask import Flask,render_template\napp = Flask(__name__)\n@app.route('\/')\ndef index():\n    return 'this is the homepage'\nif __name__ ==  \"__main__\":\n    app.run(debug=True, host=\"0.0.0.0\",port=8080)\nIt works fine but when I close it using ctrl+z in the terminal and try to run it again I get OSError: [Errno 98] Address already in use\nSo I tried changing the port address and re-running it which works for some of the port numbers I enter. But I want to know a graceful way to clear the address being used by previous program so that it is free for the current one. \nAlso is what is the apt way to shutdown a server and free the port address.\nKindly tell a simple way to do so OR explain the method used fully because I read solutions to similar problems but didn't understand any of it.\nWhen I run\nnetstat -tulpn\nThe output is : \n(Not all processes could be identified, non-owned process info\n will not be shown, you would have to be root to see it all.)\nActive Internet connections (only servers)\nProto Recv-Q Send-Q Local Address           Foreign Address         State       PID\/Program name\ntcp        0      0 127.0.1.1:53            0.0.0.0:*               LISTEN      -\ntcp        0      0 127.0.0.1:631           0.0.0.0:*               LISTEN      -\ntcp        0      0 0.0.0.0:3689            0.0.0.0:*               LISTEN      4361\/rhythmbox\ntcp6       0      0 ::1:631                 :::*                    LISTEN      -\ntcp6       0      0 :::3689                 :::*                    LISTEN      4361\/rhythmbox\nudp        0      0 0.0.0.0:5353            0.0.0.0:*                           3891\/chrome\nudp        0      0 0.0.0.0:5353            0.0.0.0:*                           -\nudp        0      0 0.0.0.0:39223           0.0.0.0:*                           -\nudp        0      0 127.0.1.1:53            0.0.0.0:*                           -\nudp        0      0 0.0.0.0:68              0.0.0.0:*                           -\nudp        0      0 0.0.0.0:631             0.0.0.0:*                           -\nudp        0      0 0.0.0.0:58140           0.0.0.0:*                           -\nudp6       0      0 :::5353                 :::*                                3891\/chrome\nudp6       0      0 :::5353                 :::*                                -\nudp6       0      0 :::41938                :::*                                -\nI'm not sure how to interpret it.    \nthe output of ps aux | grep 8080 \nis :\nshreyash 22402  0.0  0.0  14224   928 pts\/2    S+   01:20   0:00 grep --color=auto 8080\nI don't know how to interpret it.\nWhich one is the the process name and what is it's id?","AnswerCount":4,"Available Count":2,"Score":-0.049958375,"is_accepted":false,"ViewCount":10441,"Q_Id":50891073,"Users Score":-1,"Answer":"You will have another process listening on port 8080. You can check to see what that is and kill it. You can find processes listening on ports with netstat -tulpn. Before you do that, check to make sure you don't have another terminal window open with the running instance.","Q_Score":0,"Tags":"python,flask","A_Id":50891141,"CreationDate":"2018-06-16T19:30:00.000","Title":"How to I close down a python server built using flask","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"When I run this simple code:\nfrom flask import Flask,render_template\napp = Flask(__name__)\n@app.route('\/')\ndef index():\n    return 'this is the homepage'\nif __name__ ==  \"__main__\":\n    app.run(debug=True, host=\"0.0.0.0\",port=8080)\nIt works fine but when I close it using ctrl+z in the terminal and try to run it again I get OSError: [Errno 98] Address already in use\nSo I tried changing the port address and re-running it which works for some of the port numbers I enter. But I want to know a graceful way to clear the address being used by previous program so that it is free for the current one. \nAlso is what is the apt way to shutdown a server and free the port address.\nKindly tell a simple way to do so OR explain the method used fully because I read solutions to similar problems but didn't understand any of it.\nWhen I run\nnetstat -tulpn\nThe output is : \n(Not all processes could be identified, non-owned process info\n will not be shown, you would have to be root to see it all.)\nActive Internet connections (only servers)\nProto Recv-Q Send-Q Local Address           Foreign Address         State       PID\/Program name\ntcp        0      0 127.0.1.1:53            0.0.0.0:*               LISTEN      -\ntcp        0      0 127.0.0.1:631           0.0.0.0:*               LISTEN      -\ntcp        0      0 0.0.0.0:3689            0.0.0.0:*               LISTEN      4361\/rhythmbox\ntcp6       0      0 ::1:631                 :::*                    LISTEN      -\ntcp6       0      0 :::3689                 :::*                    LISTEN      4361\/rhythmbox\nudp        0      0 0.0.0.0:5353            0.0.0.0:*                           3891\/chrome\nudp        0      0 0.0.0.0:5353            0.0.0.0:*                           -\nudp        0      0 0.0.0.0:39223           0.0.0.0:*                           -\nudp        0      0 127.0.1.1:53            0.0.0.0:*                           -\nudp        0      0 0.0.0.0:68              0.0.0.0:*                           -\nudp        0      0 0.0.0.0:631             0.0.0.0:*                           -\nudp        0      0 0.0.0.0:58140           0.0.0.0:*                           -\nudp6       0      0 :::5353                 :::*                                3891\/chrome\nudp6       0      0 :::5353                 :::*                                -\nudp6       0      0 :::41938                :::*                                -\nI'm not sure how to interpret it.    \nthe output of ps aux | grep 8080 \nis :\nshreyash 22402  0.0  0.0  14224   928 pts\/2    S+   01:20   0:00 grep --color=auto 8080\nI don't know how to interpret it.\nWhich one is the the process name and what is it's id?","AnswerCount":4,"Available Count":2,"Score":0.0996679946,"is_accepted":false,"ViewCount":10441,"Q_Id":50891073,"Users Score":2,"Answer":"It stays alive because you're not closing it. With Ctrl+Z you're removing the execution from current terminal without killing a process.\nTo stop the execution use Ctrl+C","Q_Score":0,"Tags":"python,flask","A_Id":50891134,"CreationDate":"2018-06-16T19:30:00.000","Title":"How to I close down a python server built using flask","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I created a virtual environment in my new directory with virtualenv env and then in Windows Git Bash ran env\/Scripts\/activate, which seemed to work. I didn't notice my virtualenv being displayed in parens at the beginning of the line (question1: can I set it up to work like that?), so to check if it was indeed activated I ran pip -V which gave me:\npip 9.0.1 from c:\\tools\\python2\\lib\\site-packages (python 2.7)\nShouldn't that be giving the directory of my virtualenv rather than site-packages? I also ran pip list and it gave me a list of installs that I had (naughtily) installed globally for a different project. So I can only assume my virtualenv did not activate and I don't know why that is.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":4617,"Q_Id":50902497,"Users Score":2,"Answer":"Your suspicions are correct. Try source Scripts\/activate. What you did will run the command in a new and temporary shell instance.","Q_Score":3,"Tags":"python,virtualenv,git-bash","A_Id":50902578,"CreationDate":"2018-06-18T03:56:00.000","Title":"How to tell if virtualenv is activated in Windows Git Bash","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Have a linux setup, where I need 2 Python processes to use the same comport, how can I easily share that serial port resource between to separate processes?\nIts only the server program that need to open the serial port and then the client shall connect to server and use the same serial port.\nShall i go after socket or something else?\nAny point to code example will be appreciated.\nBr \nEsben","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":236,"Q_Id":50920990,"Users Score":0,"Answer":"My solution was to build a multiprocessing server handling the serial trafic, Then post message to and from the servers through a queue from my client programs.","Q_Score":0,"Tags":"python,linux,serial-port","A_Id":58409440,"CreationDate":"2018-06-19T05:09:00.000","Title":"How can i share a serialport between 2 different processes in Python","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"On my dev machine I installed and configured celery within a django app and it works without issues using python3.5 and the django dev webserver.\nWhen I deploy that app to my production server I get an error \"no module named celery\". On the production server runs python3.6 with apache2 and mod_wsgi.\nOn both machines I use django-1.11 and celery-4.1.0 within a virtualenv. I suspect that it's either an issue with python3.6 or with mod_wsgi.\nI haven't found any real solution to my issue so I'm trying my luck here :)\nCheers\nMichael","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":197,"Q_Id":50929437,"Users Score":0,"Answer":"So, I figured it out. Apparently my virtualenv was pointing to another directory and not to the one apache was using. No idea how this happend. Anyway, after removing and recreating the virtualenv it worked.\nThanks for your help!","Q_Score":0,"Tags":"python,django,celery","A_Id":50931395,"CreationDate":"2018-06-19T13:14:00.000","Title":"No module named celery using python 3.6 and apache2","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"On my dev machine I installed and configured celery within a django app and it works without issues using python3.5 and the django dev webserver.\nWhen I deploy that app to my production server I get an error \"no module named celery\". On the production server runs python3.6 with apache2 and mod_wsgi.\nOn both machines I use django-1.11 and celery-4.1.0 within a virtualenv. I suspect that it's either an issue with python3.6 or with mod_wsgi.\nI haven't found any real solution to my issue so I'm trying my luck here :)\nCheers\nMichael","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":197,"Q_Id":50929437,"Users Score":0,"Answer":"As a sanity check, make sure the celery is actually installed in the virtual environment you use.\nIf you are using virtual environment with mod_wsgi, you may need to setup python-home=<path_to_your_virtual_env> in the WSGIDaemonProcess directive. \n\nExample:\n\nWSGIDaemonProcess django python-path=\/opt\/portal\/src\/ python-home=\/opt\/venv\/django home=\/opt\/portal\/ \n\nYou can use the comma-separated list if more than one directory is required in python-path","Q_Score":0,"Tags":"python,django,celery","A_Id":50930345,"CreationDate":"2018-06-19T13:14:00.000","Title":"No module named celery using python 3.6 and apache2","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"How to call an external program in Linux and also pass some arguments to it?\nFor example I want to open 'nedit' in Linux and pass some text there..\nIs it possible?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":24,"Q_Id":50939677,"Users Score":0,"Answer":"import os\ncommand = r'...\/...externalProgram'\nos.system(command)\nor \nimport subprocess\ncommand = r'...\/...externalProgram'\nsubprocess.run(command)","Q_Score":0,"Tags":"python-3.x,python-2.7","A_Id":50944284,"CreationDate":"2018-06-20T03:18:00.000","Title":"Calling external programs using python","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"So I am new to Python (and programming in general) and I am trying to install it on my Mac. Forgive me if I might ask silly questions.\nI currently have Python 3.6 and django 2.0 installed with it\n- I just installed virtualenv and pipenv which I don't get the difference but my terminal says that those scripts are not on PATH. How do I add those directories to the PATH and how can I check that they are on the right path?\nDo I need something more before starting to code?\nThanks!","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":1786,"Q_Id":50943130,"Users Score":1,"Answer":"You need to add those directories to your PATH variable. Thus you can use them on shell without writing directories all the time.\necho 'export PATH=YOUR_VIRENV_PATH:$PATH' >> ~\/.profile","Q_Score":0,"Tags":"python,django,path,installation,virtualenv","A_Id":50943712,"CreationDate":"2018-06-20T07:57:00.000","Title":"Scripts for Python are not on PATH","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":1},{"Question":"I am trying to set up a virtual environment for a Django project, using Python 2.7. Both Python 2.7 and 3.6 are installed on my Mac.\nI run the command, specifying the path to Python 2.7 virtualenv --python=\/usr\/bin\/python2.7 venv and everything seems to work fine. However, when I run venv source\/bin\/activate it tells me venv: command not found.\nSomething is broken. I have read similar answers on Stack Overflow but nothing seems to be working. I have installed and uninstalled virtualenv with pip, tried running with superuser etc.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":482,"Q_Id":50946055,"Users Score":1,"Answer":"I guess you need source venv\/bin\/activate. source is a command, venv is the directory your virtualenv is located in.","Q_Score":0,"Tags":"python,django,virtualenv","A_Id":50946114,"CreationDate":"2018-06-20T10:29:00.000","Title":"Cannot execute virtualenv commands when using Python 2.7","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Background\nI have two python projects. Project A and Project B.\nEach project has its own virtual environment and its own setup.py.\nBoth projects are not pure py files and has \"build\" process like building extensions, generate source etc.\nA is dependent on B (setup.py install_requires points on B).\nEach project is built and published\/distributed as a wheel to pypi on-premise repository.\npip install w\/wo -e (development mode) of project A, nicely installs project B into project A venv site-packages.\nSo far everything is working nicely and \"by the book\".\nNow, my story get complicated ...\nI would like to develop the two projects together without having to publish B in order A to consume it.\nAs example, I would like to:\n\nChange something in B.\nbuild B (setup.py build).\nNOT publish B as wheel to pypi.\nGoal - Project A will \"know\" the modified Project B. WITHOUT manually tweaking sys.path.\n\nI actually want the pip install -e of project A to install project B in development mode too.\nAfter some reading I understood (hopefully correctly) that one can define a \"distribution\" as a local source folder by --find-links flag. \nI defined project B root folder in --find-links.\nI tried it with (on project A setup.py folder):\n\npip install . -e --find-links = file:\/\/\/path\/to\/B\npip install . -e --find-links = git+file:\/\/path\/to\/B\n\nBoth did not work.\nBTW, Puting in the path to B wheel or egg of B,\nex: pip install . -e --find-links = file:\/\/\/path\/to\/B.whl\ndid work but this is not what I am looking for.\nHope you are still with me :-) (sorry for the tedious story)\nWhat am I missing?\nTx","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":1887,"Q_Id":50957833,"Users Score":1,"Answer":"Let me try and restate the problem:\n\nYou work on two python packages, package A and package B. A depends on B.\nYou have chosen to develop these two packages in separate virtual environments.\nYou would like to make some local changes to package B and have package A use the modified version of package B.\n\nI apologize if I'm missing something here, but why not simply install both packages in the same virtual environment, which will make this problem go away?\nI.e. after creating your environment, you install package B in editable mode, followed by installing package A. Any changes in B will be picked up by A, no changes needed.","Q_Score":6,"Tags":"python,python-3.x,pip,setuptools,python-wheel","A_Id":56411443,"CreationDate":"2018-06-20T22:16:00.000","Title":"python pip - development mode with local dependencies","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a Docker image which runs a python subprocess, which is a node.js server exposing an end point \/check. The whole thing is put inside a Kubernetes pod and uses \/check as the readinessProbe endpoint.\nNow at some point, I want to close this endpoint or force-fail all the requests coming at it. Ideally, I want to do this via higher-level entities (i.e. Kubernetes lifecycle hooks) so as not to touch the lower-level implementation (such as opening a new endpoint \/stop that switch some boolean flag and force the \/check to fail)\nIs that possible at all? If not, what is the best alternative?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":50,"Q_Id":50966018,"Users Score":1,"Answer":"Is that possible at all? If not, what is the best alternative?\n\nI believe there are a few:\n\nremote address filtering\nmagic headers\na formal proxy container\n\nremote address\nRequests to \/check coming from kubernetes will come from the Node's SDN IP address (so if a Node's SDN subnet is 10.10.5.0\/24, then requests will come from 10.10.5.1), so you could permit the checks from the .1 of the \/24 assigned to the Pod\nmagic headers\nThe httpGet readinessProbe allows httpHeaders: so you could turn on HTTP Basic auth for \/check and then put the - name: Authentication value: Basic xxyyzz== in the httpHeaders:\na formal proxy container\nAdd a 2nd container to the Pod that runs haproxy and filters \/check requests to return 401 or 404 or whatever you want. Since all containers in a Pod share the same networking namespace, configuring haproxy to speak to your node.js server will be super trivial, and your readinessProbe (as well as liveliness) can continue to use the URL because only kubernetes will have access to it by using the non-haproxy container's port. To complete that loop, point the Service at the haproxy container's port.","Q_Score":0,"Tags":"python,node.js,docker,kubernetes","A_Id":50981018,"CreationDate":"2018-06-21T10:15:00.000","Title":"Close off an endpoint on node.js server by via Kubernetes","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"But when i run command sudo apt-get install python3-pip. It is installed but inot as python3.6. It is installed in python3.5.I have also specified the version in command i.e sudo apt-get install python3.6-pip.But it gives me an error.\nReading package lists... Done\nBuilding dependency tree\nReading state information... Done\nE: Unable to locate package python3.6-pip\nE: Couldn't find any package by glob 'python3.6-pip'\nE: Couldn't find any package by regex 'python3.6-pip'","AnswerCount":4,"Available Count":3,"Score":0.0,"is_accepted":false,"ViewCount":3123,"Q_Id":50966768,"Users Score":0,"Answer":"This will help you fix the above problem\nYou need to add following personal package repository:\nsudo add-apt-repository ppa:deadsnakes\/ppa\nCheck for updates\nsudo apt-get update\ninstall python using following command\nsudo apt-get install python3.6","Q_Score":0,"Tags":"python,pip","A_Id":63793923,"CreationDate":"2018-06-21T10:54:00.000","Title":"I want to install pip for python3.6. When i allready have another version of python3 is installed.","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"But when i run command sudo apt-get install python3-pip. It is installed but inot as python3.6. It is installed in python3.5.I have also specified the version in command i.e sudo apt-get install python3.6-pip.But it gives me an error.\nReading package lists... Done\nBuilding dependency tree\nReading state information... Done\nE: Unable to locate package python3.6-pip\nE: Couldn't find any package by glob 'python3.6-pip'\nE: Couldn't find any package by regex 'python3.6-pip'","AnswerCount":4,"Available Count":3,"Score":0.0,"is_accepted":false,"ViewCount":3123,"Q_Id":50966768,"Users Score":0,"Answer":"It was easy. I just changed my default python3 version:\nsudo gedit ~\/.bashrc  alias python3=\"python3.6\"\nNow I  can install the packages using python3.6 with\n-m pip install 'packagenae'","Q_Score":0,"Tags":"python,pip","A_Id":50967592,"CreationDate":"2018-06-21T10:54:00.000","Title":"I want to install pip for python3.6. When i allready have another version of python3 is installed.","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"But when i run command sudo apt-get install python3-pip. It is installed but inot as python3.6. It is installed in python3.5.I have also specified the version in command i.e sudo apt-get install python3.6-pip.But it gives me an error.\nReading package lists... Done\nBuilding dependency tree\nReading state information... Done\nE: Unable to locate package python3.6-pip\nE: Couldn't find any package by glob 'python3.6-pip'\nE: Couldn't find any package by regex 'python3.6-pip'","AnswerCount":4,"Available Count":3,"Score":0.0996679946,"is_accepted":false,"ViewCount":3123,"Q_Id":50966768,"Users Score":2,"Answer":"You can install python packages using python3.6 -m pip install [Package_to_install] straight away.","Q_Score":0,"Tags":"python,pip","A_Id":50966836,"CreationDate":"2018-06-21T10:54:00.000","Title":"I want to install pip for python3.6. When i allready have another version of python3 is installed.","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm trying to install google earth engine python API on my pc. \nDuring installation process i received this error message \"distributed 1.21.8 requires msgpack, which is not installed\". I looked for the different possilities to install this package but, it didn't function. \nHow can I do?\nMy pc is windows and I used Anaconda\nthanks so much","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":4433,"Q_Id":50967358,"Users Score":3,"Answer":"I had the same problem. Try this here:  pip install msgpack","Q_Score":0,"Tags":"python,anaconda,google-earth","A_Id":50977048,"CreationDate":"2018-06-21T11:22:00.000","Title":"Distributed 1.21.8 requires msgpack","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"From what I understand about Docker, it's a tool used for virtual environments. In their lingo, its called \"containerization\". This is more or less what Python's virtualenv does. However, you can use virtualenv in Docker. So, is it a virtual environment inside a virtual environment? I'm confused as to how this would even work, so could someone please clarify?","AnswerCount":4,"Available Count":3,"Score":1.0,"is_accepted":false,"ViewCount":42477,"Q_Id":50974960,"Users Score":15,"Answer":"Adding to the above: there is a case for combining docker and venv: some OSs ship with python installed to provide 'OS-near' apps, e.g., to my knowledge, apt on debian (and its derivatives). The python venv enables a developer to ship a python app which requires a different interpreter version without affecting the shipped-with-the-OS python. Now, since Docker 'isolates the whole OS' as stated above, the same applies to a Docker image. Hence, in my view, if a Docker image is required\/desired, it is best practice to create a venv inside the Docker image for your python app.","Q_Score":158,"Tags":"python,docker,virtualenv","A_Id":53268363,"CreationDate":"2018-06-21T18:00:00.000","Title":"What's the difference between Docker and Python virtualenv?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"From what I understand about Docker, it's a tool used for virtual environments. In their lingo, its called \"containerization\". This is more or less what Python's virtualenv does. However, you can use virtualenv in Docker. So, is it a virtual environment inside a virtual environment? I'm confused as to how this would even work, so could someone please clarify?","AnswerCount":4,"Available Count":3,"Score":1.0,"is_accepted":false,"ViewCount":42477,"Q_Id":50974960,"Users Score":35,"Answer":"Python virtual environment will \"containerize\" only Python runtime i.e. python interpreter and python libraries whereas Docker isolates the whole system (the whole file-system, all user-space libraries, network interfaces) . Therefore Docker is much closer to a Virtual Machine than virtual environment.","Q_Score":158,"Tags":"python,docker,virtualenv","A_Id":50975029,"CreationDate":"2018-06-21T18:00:00.000","Title":"What's the difference between Docker and Python virtualenv?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"From what I understand about Docker, it's a tool used for virtual environments. In their lingo, its called \"containerization\". This is more or less what Python's virtualenv does. However, you can use virtualenv in Docker. So, is it a virtual environment inside a virtual environment? I'm confused as to how this would even work, so could someone please clarify?","AnswerCount":4,"Available Count":3,"Score":0.0996679946,"is_accepted":false,"ViewCount":42477,"Q_Id":50974960,"Users Score":2,"Answer":"\"a virtual environment, a self-contained directory tree that contains a Python installation for a particular version of Python, plus a number of additional packages\"\nA docker container provides a higher level of abstraction\/isolation, it can has its own \"process space, file system, network space, ipc space, etc.\"","Q_Score":158,"Tags":"python,docker,virtualenv","A_Id":66633116,"CreationDate":"2018-06-21T18:00:00.000","Title":"What's the difference between Docker and Python virtualenv?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I want to test celery task using pytest in Django. \nIf I use celery_worker parameter in test function then I get an error:\n\n{OperationalError}database table is locked (sqllite).\n\nIf I run worker before tests and do not use celery_worker parameter then task run seccesfully but I can't locate changes in the test database (pytestmark = pytest.mark.django_db) as all updates links to the original database.\nI try to run the test in Docker (postgresql db) but with parameter celery_worker I get error:\n\npsycopg2.InterfaceError: connection already closed","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":347,"Q_Id":50986520,"Users Score":1,"Answer":"Need to use celery_worker parameter in pair with pytest mark @pytest.mark.django_db(transaction=True).","Q_Score":1,"Tags":"python,django,postgresql,celery,pytest","A_Id":50987884,"CreationDate":"2018-06-22T11:03:00.000","Title":"Pytest celery: cleaned up database after task call","Data Science and Machine Learning":0,"Database and SQL":1,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"When I installed the new version of python 3.6.5, JGRASP was using the previous version, how can I use the new version on JGRASP?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":512,"Q_Id":51018026,"Users Score":0,"Answer":"By default, jGRASP will use the first \"python\" on the system path. \nThe new version probably only exists as \"python3\". If that is the case, install jGRASP 2.0.5 Beta if you are using 2.0.4 or a 2.0.5 Alpha. Then, go to \"Settings\" > \"Compiler Settings\" > \"Workspace\", select language \"Python\" if not already selected, select environment \"Python 3 (python 3) - generic\", hit \"Use\" button, and \"OK\" the dialog.","Q_Score":0,"Tags":"python,python-3.x,macos,jgrasp","A_Id":51036825,"CreationDate":"2018-06-25T07:13:00.000","Title":"How can I update Python version when working on JGRASP on mac os?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to download a package to call sc2 and when I write pip install sc2 into cmd prompt, I receive the error:\n\nCommand \"python setup.py egg_info\" failed with error code 1 in c:\\users\\user\\appdata\\local\\temp\\pip-install-q3ixb0\\websockets.\n\nAny help?","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":892,"Q_Id":51020212,"Users Score":0,"Answer":"Maybe are you behind a proxy or not connected? has you try to make ping to any url ?","Q_Score":0,"Tags":"python,pip","A_Id":51020333,"CreationDate":"2018-06-25T09:28:00.000","Title":"Pip install Command \"python setup.py egg_info\" failed with error code","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to download a package to call sc2 and when I write pip install sc2 into cmd prompt, I receive the error:\n\nCommand \"python setup.py egg_info\" failed with error code 1 in c:\\users\\user\\appdata\\local\\temp\\pip-install-q3ixb0\\websockets.\n\nAny help?","AnswerCount":2,"Available Count":2,"Score":0.0996679946,"is_accepted":false,"ViewCount":892,"Q_Id":51020212,"Users Score":1,"Answer":"easy_install Worked of me.\neasy_install sc2","Q_Score":0,"Tags":"python,pip","A_Id":51020599,"CreationDate":"2018-06-25T09:28:00.000","Title":"Pip install Command \"python setup.py egg_info\" failed with error code","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am using python-gnupg to decrypt files I am downloading that are encrypted. I have already built an executable that works perfectly but the issue I am having is when I run it as a Windows Service. For some odd reason when I install and run my executable as a Windows Service it fails to decrypt my files. \nI think my issue may be with the scope of the service\/where my files reside but I can't seem to find out why. I have added the path to gpg.exe to my PATH environment variable for the system and the gpg files are in my C: drive (not a local users).  \nI am using Kleopatra to store my certificates as well. \nSo essentially there is some conflict between GPG and Windows Services and I cannot figure out why. Any help would be greatly appreciated, thank you in advance.","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":575,"Q_Id":51044613,"Users Score":1,"Answer":"by giving a direct path to the gpg home directory and to the gpg binary location within my python script like this gpg = gnupg.GPG(gnupghome=\"C:\\path_to_gnupg\" ,gpgbinary=\"C:\\path_to_gpg.exe\") the service was able to run directly. It must have been having troubles locating the secret keys on its own.","Q_Score":1,"Tags":"python,windows,service,gnupg","A_Id":51066237,"CreationDate":"2018-06-26T13:53:00.000","Title":"GPG Decryption Using Python (as a Windows Service)","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I successfully added a new JDBC interpreter to my preferred DB, by using the normal zeppelin UI. It works. My Zeppelin is running on a docker container on my machine. I noticed it added my interpreter configuration to \/zeppelin\/conf\/interpreter.json file.\nI extracted the piece of json that was inserted on the file, under interpreterSettings collection. I built a script that would programmatically add that json block to \/zeppelin\/conf\/interpreter.json so that my container would start with that interpreter configured out of the box.\nBut after I run my script on a brand new Zeppelin container what happen is that:\n 1) it works - the piece of json is successfully inserted into \/zeppelin\/conf\/interpreter.json\n 2) Zeppelin won't show my interpreter on its UI\nWhat else must I do to programmatically add this interpreter to my Zeppelin container?","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":351,"Q_Id":51055457,"Users Score":0,"Answer":"I believe you approach will work in new version 0.8.0. In 0.8.0 interpreter ID equals interpreter name.\nIn previous versions interpreters have unique ID and this maybe reason of your question.\nRemember that Zeppelin server must be off while editing conf\/interpreter.json","Q_Score":0,"Tags":"python,docker,jdbc,interpreter,apache-zeppelin","A_Id":51195921,"CreationDate":"2018-06-27T05:56:00.000","Title":"How to add a new jdbc interpreter to Zeppelin by editing its conf\/interpreter.json file?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I successfully added a new JDBC interpreter to my preferred DB, by using the normal zeppelin UI. It works. My Zeppelin is running on a docker container on my machine. I noticed it added my interpreter configuration to \/zeppelin\/conf\/interpreter.json file.\nI extracted the piece of json that was inserted on the file, under interpreterSettings collection. I built a script that would programmatically add that json block to \/zeppelin\/conf\/interpreter.json so that my container would start with that interpreter configured out of the box.\nBut after I run my script on a brand new Zeppelin container what happen is that:\n 1) it works - the piece of json is successfully inserted into \/zeppelin\/conf\/interpreter.json\n 2) Zeppelin won't show my interpreter on its UI\nWhat else must I do to programmatically add this interpreter to my Zeppelin container?","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":351,"Q_Id":51055457,"Users Score":0,"Answer":"My problem was happening because after the Zeppelin container started, it was already too late. Zeppelin service was up and running and it would have already loaded interpreter.json. So, what I did was to configure my Dockerfile ENTRYPOINT to a script of mine, overwriting the standard Zeppelin container's entry point. My script would do the injection of the additional configurations I needed on interpreter.json file and call \/zeppelin\/bin\/zeppelin.sh to start zeppelin.\nThis way, I could do whatever I want with the configuration files BEFORE Zeppelin was actually started inside the container. \nKind regards,\nAS","Q_Score":0,"Tags":"python,docker,jdbc,interpreter,apache-zeppelin","A_Id":51215244,"CreationDate":"2018-06-27T05:56:00.000","Title":"How to add a new jdbc interpreter to Zeppelin by editing its conf\/interpreter.json file?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I'm still new to writing scripts with Python and would really appreciate some guidance.\nI'm wondering how to continue executing my Python script from where it left off after a system restart.\nThe script essentially alternates between restarting and executing a task for example: restart the system, open an application and execute a task, restart the system, open another application and execute another task, etc... \nBut the issue is that once the system restarts and logs back in, all applications shut down including the terminal so the script stops running and never executes the following task. The program shuts down early without an error so the logs are not really of much use. Is there any way to reopen the script and continue from where it left off or prevent applications from being closed during a reboot ? Any guidance on the issue would be appreciated.\nThanks!\nAlso, I'm using a Mac running High Sierra for reference.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":1385,"Q_Id":51055649,"Users Score":0,"Answer":"You could write your current progress to a file just before you reboot and read said file on Programm start.\nAbout the automatic restart of the script after reboot: you could have the script to put itself in the Autostart of your system and after everything is done remove itself from it.","Q_Score":2,"Tags":"python,scripting-language","A_Id":51055706,"CreationDate":"2018-06-27T06:09:00.000","Title":"How to Resume Python Script After System Reboot?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a problem with \"TESSEROCR\" python library.\nI am using ubuntu 16 (remote connection) , python 3.6, tesseract 4.\nI have managed to install it using PIP or CPPFLAGS=-I\/usr\/local\/include pip install tesserocr method.\nHowever the problem is:\nOnce I open Python and type: import tesserocr python shuts down and I'm back into terminal. I tried to reinstall, build from source and even multiple combination of different versions. \nI have no idea where to look for.","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":273,"Q_Id":51062268,"Users Score":0,"Answer":"So there are two problems which I faced while installing Tesserocr library to use System Tesserocr:\n\nI needed to install python-dev as the TesserOCR Library has some dependences which are available only in python-dev. sudo apt install python3-dev\nYou need to set your locale, for which I used export LC_ALL=C.\n\nAfter activating my virtualenv, I did simply pip install tesserocr and it worked like charm.","Q_Score":0,"Tags":"python,ubuntu,tesseract","A_Id":59137298,"CreationDate":"2018-06-27T11:59:00.000","Title":"Tesserocr crashes python","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am using tempfile.mkstemp to generate a random available filename and write some content with os.fdopen. I then pass the filename to a task via celery. \nThis task opens the file, processes the content, and finally removes the file.\nIn testing this works fine, however I have realised that this will break in my live environment where the user running the task is not the same as the one which creates the file. \nThis means that the user cannot open the file because tempfile.mkstemp sets the permissions to 600(-rw-------). \nI cannot make both processes run by the same user, so is there some way to modify the file permissions set by tempfile.mkstemp? \nI am running Python 3.6 on Ubuntu 14.04.","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":1930,"Q_Id":51063378,"Users Score":4,"Answer":"Given that you use os.fdopen after you call mkstemp(), you may be better off using tempfile.NamedTemporaryFile(delete=False). It returns a Python file object instead of an fd.\nEither way, the returned file will have mode=0600, so you will need to change it. Use os.fchmod(temp_file.fileno(), 0640) or similar (change the mode as per your needs).","Q_Score":3,"Tags":"python,file-permissions,mkstemp","A_Id":51063833,"CreationDate":"2018-06-27T12:56:00.000","Title":"tempfile.mkstemp permissions settings","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a long running python batch process that is processing data from a REST API. In case the program crashes or terminates for some reason I want to save info about the position of my last processing so I can restart and resume. I do not want to loose that info (store it on disk and not only in RAM).\nHow can I handle this if possible with a lightweight solution maybe without a database?\nThanks\nPhilip","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":217,"Q_Id":51070285,"Users Score":3,"Answer":"You might want to look at the python module 'shelve'.\nIt allows you to save data on disk and then retrieve it when needed.","Q_Score":0,"Tags":"python,batch-processing","A_Id":51070349,"CreationDate":"2018-06-27T19:40:00.000","Title":"Python: How do I save data even when a long running batch process crashes?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"In the R programming language, there is a site.profile file that defines some code that R processes execute on start up. Is there similar functionality in Python?\nEdit: to clarify, this script should be executed if the user calls python from the command line, but also if python is spawned from another process (e.g. if the user's script uses subprocess to spawn another python).","AnswerCount":3,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":1358,"Q_Id":51071691,"Users Score":0,"Answer":"File pointed by your environmental variable PYTHONSTARTUP would be run on starting an interactive python session\nAnd USER_SITE\/usercustomize.py will be run for non-interactive python session.\nRun python -c \"import site; print(site.USER_SITE)\" to find the USER_SITE dir location","Q_Score":1,"Tags":"python,startup","A_Id":51071772,"CreationDate":"2018-06-27T21:29:00.000","Title":"Is there a way to always execute a script when python starts? (similar site.profile in R)","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"How do you change the names of commands within a terminal - I want to customise some of the commands just for a bit of fun, eg, instead of having to type python, I want to be able to type snek. I know it's silly but it's been a long day and I'd love something to cheer myself up - any help at all would be greatly appreciated!","AnswerCount":2,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":569,"Q_Id":51116277,"Users Score":1,"Answer":"Steps:\n\nGo to your .bashrc file in your home folder\nUse an editor like vim or nano to edit the file\nGo at the bottom and on a new line write alias snek='python'\nClose the file and run source .bashrc. This will load the .bashrc file again.\nNow you can just write snek and python prompt will open.","Q_Score":0,"Tags":"python,command-line,terminal,renaming","A_Id":51116337,"CreationDate":"2018-06-30T15:37:00.000","Title":"Changing command names within the terminal","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm trying to install MySQLdb for Python on Mac OS.\nWhen I digit pip install MySQL-python shell returns to this:\n Collecting MySQL-python\n  Using cached https:\/\/files.pythonhosted.org\/packages\/a5\/e9\/51b544da85a36a68debe7a7091f068d802fc515a3a202652828c73453cad\/MySQL-python-1.2.5.zip\n    Complete output from command python setup.py egg_info:\n    Traceback (most recent call last):\n      File \"\", line 1, in \n      File \"\/private\/var\/folders\/9h\/2lp9kx993ygbrfk1lxr0sz500000gq\/T\/pip-install-7xyyBe\/MySQL-python\/setup.py\", line 17, in \n        metadata, options = get_config()\n      File \"setup_posix.py\", line 53, in get_config\n        libraries = [ dequote(i[2:]) for i in libs if i.startswith(compiler_flag(\"l\")) ]\n      File \"setup_posix.py\", line 8, in dequote\n        if s[0] in \"\\\"'\" and s[0] == s[-1]:\n    IndexError: string index out of range\n\n    ----------------------------------------\nCommand \"python setup.py egg_info\" failed with error code 1 in \/private\/var\/folders\/9h\/2lp9kx993ygbrfk1lxr0sz500000gq\/T\/pip-install-7xyyBe\/MySQL-python\/\n\nWhat can I do? I searched everywhere but I couldn't find an answer.\n(I had installed Python 2.7)","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":3629,"Q_Id":51123044,"Users Score":7,"Answer":"I fixed the error. If anyone have this error just follow these steps:\n\nFirst of all install mysql connector\n\nbrew install mysql-connector-c\n\n\nYou have to modify lines in mysql_config (this is an alias)\n\n\nvim \/usr\/local\/bin\/mysql_config \n\n(I sincerely consider to open mysql_config with a file editor, you can find the \n exact folder here)\n\n\/usr\/local\/Cellar\/mysql-connector-c\/6.1.11\/bin\/ \n\n\nReplace these lines.\n\n\n\n  # Create options \n  libs=\"-L$pkglibdir\"\n  libs=\"$libs -l \"\n\nshould be:\n  \n  # Create options \n  libs=\"-L$pkglibdir\"\n  libs=\"$libs -lmysqlclient -lssl -lcrypto\"\n\n\n\nSet environment variable\n\n\nbrew info openssl\n\nit would tell what\u2019s needed\n\n For compilers to find this software you may need to set:\n      LDFLAGS:  -L\/usr\/local\/opt\/openssl\/lib\n      CPPFLAGS: -I\/usr\/local\/opt\/openssl\/include\n  For pkg-config to find this software you may need to set:\n      PKG_CONFIG_PATH: \/usr\/local\/opt\/openssl\/lib\/pkgconfig\n\n\n\nThen you can install MySQL\n\n\npip install MySQL-python\n\n\nYou can test if MySQL is installed with this:\n\n\npython -c \"import MySQLdb\" \n\nHope this works also for you!","Q_Score":2,"Tags":"python,macos,mysql-python","A_Id":51132141,"CreationDate":"2018-07-01T11:53:00.000","Title":"pip install MySQL-python","Data Science and Machine Learning":0,"Database and SQL":1,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I've been looking an so far have been unable to find any way of enabling syntax highlighting for jenkinsfile in PyCharm. Does anyone know of a method to do this? I am specifically using scripted pipeline.","AnswerCount":5,"Available Count":1,"Score":0.1194272985,"is_accepted":false,"ViewCount":15863,"Q_Id":51124878,"Users Score":3,"Answer":"You can't associate Jenkinsfile with Groovy in PyCharm, but you can associate them with Java. Not perfect, but the syntax is similar enough to be useful for simple files. \nTo do that (in PyCharm 2018.3):\nPyCharm > Preferences > Editor > File Types > Select \"Java\" under \"Recognized File Types\" > Click the + > Type \"Jenkinsfile\"","Q_Score":27,"Tags":"python,jenkins,pycharm,jenkins-pipeline,jetbrains-ide","A_Id":56991005,"CreationDate":"2018-07-01T16:01:00.000","Title":"Jenkinsfile syntax highlighting in PyCharm Idea","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a game where I've (foolishly) made the db key equal to the users login email.  I did this several years ago so I've got quite a few users now. Some users have asked to change their email login for my game.  Is there a simple way to change the key?  As far as I can tell I'd need to make a new entry with the new email and copy all the data across, then delete the old db entry. This is the user model but then I've got other models, like one for each game they are involved in, that store the user key so I'd have to loop though all of them as well and swap out for the new key. \nBefore I embark on this I wanted to see if anyone else had a better plan. There could be several models storing that old user key so I'm also worried about the process timing out. \nIt does keep it efficient to pull a db entry as I know the key from their email without doing a search, but it's pretty inflexible in hindsight","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":191,"Q_Id":51127822,"Users Score":0,"Answer":"I ended up adding a new property to my user model and running a crawler to copy the string key (the email) to that new property. I changed my code search for that property rather then the key string to get a user item.  Most of my users still have keys that equal their email, but I can safely ignore them as if the string is meaningless.  I can now change a users email easily without making a new recored and my other models that have pointers to these user keys can remain unchanged.","Q_Score":1,"Tags":"google-app-engine,app-engine-ndb,google-app-engine-python","A_Id":51229386,"CreationDate":"2018-07-01T23:56:00.000","Title":"Change appengine ndb key","Data Science and Machine Learning":0,"Database and SQL":1,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I am new to Kafka. I am sending a request to REST server and send the response of the request to kafka server as messages.\nWhen i consume the data from consumer the message is split into multiple smaller messages. How do i avoid this. The response is a JSON row. I want each json row to be one message. Any help would be appreciated. The size of the Json is also not very big. A json with over 1500 rows is about 2 MB\nFor eg \n\nConsumerRecord(topic='meetup_sample', partition=0, offset=445386, >timestamp=1530554568191, timestamp_type=0, >key=b'5fa4964b035c072a81fedb93cfca8f0ecb562cf913c69f63efbbf4e799871f05', >value=b':\"food-and-drink\",\"topic_name\":\"Food and Drink\"},{\"urlkey\":\"newintown\",\"topic_name\":\"New In Town\"},{\"urlkey\":\"beer\",\"topic_name\"', >checksum=None, serialized_key_size=64, serialized_value_size=128)\n  \n  ConsumerRecord(topic='meetup_sample', partition=0, offset=445387, >timestamp=1530554568192, timestamp_type=0, >key=b'1f170ceabf91335d332487ebb0890f0bd0ed69018c618ecc2c789a260d561f43', >value=b':\"Beer\"},{\"urlkey\":\"game-night\",\"topic_name\":\"Game Night\"},{\"urlkey\":\"happy-hours\",\"topic_name\":\"Happy Hour\"},{\"urlkey\":\"water-s', >checksum=None, serialized_key_size=64, serialized_value_size=128)","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":556,"Q_Id":51141942,"Users Score":0,"Answer":"Once use fetch.message.max.bytes=2000000 in consumer side","Q_Score":0,"Tags":"python-3.x,apache-kafka,streaming","A_Id":71822982,"CreationDate":"2018-07-02T18:32:00.000","Title":"Kafka Messages are split in consumer","Data Science and Machine Learning":1,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have been asked to create a system which has different functionalities. Assume service 1, service 2 and service 3. I need to run these services per hour to do something. \nTo make the system of those services I need: database, web interface for seeing the result of the process, caching and etc.\nThis is what I have thought about so far:\n\nI need kubernetes to orchestrate my services which are packaged as docker containers. I will deploy mySql to save my data and I can use Redis cache for caching.\nMy service are written by python scripts and Java and need to interact with each other through APIs.\nI think I can use AWS EKS for my kubernetes cluster \n\n\nthis is what I need to know: \n\nhow to deploy python or Java applications and connect them to each other and also connect them to a database service\nI also need to know how to schedule the application to run per hour so I can see the results in the web interface.\n\nPlease shoot any ideas or questions you have. \nAny help would be appreciated.","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":42,"Q_Id":51164215,"Users Score":1,"Answer":"For python\/java applications, create docker images for both applications. If these application run forever to serve traffic then deploy them as deployments.If you need to have only cron like functionality, deploy as  Job in kubernetes.\nTo make services accessible, create services as selector for applications, so these services can route traffic to specific applications.\nDatabase or cache should be exposed as service endpoints so your applications are environment independent.","Q_Score":0,"Tags":"java,python,docker,kubernetes","A_Id":51166017,"CreationDate":"2018-07-04T00:03:00.000","Title":"kubernetes architecture for microservices application - suggestions","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I have three scripts:\nconfig.yaml and script.py and slurm.sh\nI am submitting job to the job scheduler in Slurm using the slurm.sh file which calls the script.py file and the script.py files loads the config from the config.yaml file.\nIt would look like this:\nsbatch slurm.sh\nNow, I change the config.yaml and submit another job. However, if both jobs are in the queue, the config.yaml file will be overwritten and both jobs will use the same configuration. \nIs there any way to tell the slurm scheduler to cache the config.yaml file as well? I know it is dont for the slurm.sh file.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":67,"Q_Id":51169224,"Users Score":1,"Answer":"There is no way to achieve that. You should modify your script (.sh) to point to the proper configuration file before submission, and create as many configuration files as needed.\nAnother option could be to convert the configuration file entries to command line parameters (if possible) before submission and submit a script with a fully configured command line (so no need to read the .yaml file).","Q_Score":0,"Tags":"python,config,slurm,sbatch","A_Id":51175506,"CreationDate":"2018-07-04T08:33:00.000","Title":"How to tell slurm to cache config file for multiple submissions","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'd like to generate an .exe file with --onedir and move the generated exe out of the dist folder to elsewhere (e.g. Desktop) and set up some absolute path to the dist folder so that the .exe can still work properly.\nI've tried things such as, set up the Python env or the load library inside the python script to the Dist folder, but, nothing worked so far. I also looked into the manual but I couldn't find anything relevant regarding this issue. \nDoes anybody have any suggestions?","AnswerCount":2,"Available Count":2,"Score":0.1973753202,"is_accepted":false,"ViewCount":2033,"Q_Id":51197350,"Users Score":2,"Answer":"You can just make a shortcut to your .exe file. Keep the folder in your C drive or anywhere you want it, but right click on the .exe and select create shortcut.","Q_Score":1,"Tags":"python,dependencies,exe,pyinstaller,lib","A_Id":51198587,"CreationDate":"2018-07-05T17:54:00.000","Title":"Move the exe out of the dist folder and make it work?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'd like to generate an .exe file with --onedir and move the generated exe out of the dist folder to elsewhere (e.g. Desktop) and set up some absolute path to the dist folder so that the .exe can still work properly.\nI've tried things such as, set up the Python env or the load library inside the python script to the Dist folder, but, nothing worked so far. I also looked into the manual but I couldn't find anything relevant regarding this issue. \nDoes anybody have any suggestions?","AnswerCount":2,"Available Count":2,"Score":0.0996679946,"is_accepted":false,"ViewCount":2033,"Q_Id":51197350,"Users Score":1,"Answer":"The --onedir parameter creates a folder containing all your exe needs to run. You need to move the entire folder elsewhere, not just the .exe, because that's how it works.\nIf you want everything contained in a single exe, use --onefile instead. This would increase the size of your exe, but you would have to deal with only one file instead of a dir, easing portability.","Q_Score":1,"Tags":"python,dependencies,exe,pyinstaller,lib","A_Id":51197827,"CreationDate":"2018-07-05T17:54:00.000","Title":"Move the exe out of the dist folder and make it work?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm currently running an airflow (1.9.0) instance on python 3.6.5. I have a manual workflow that I'd like to move to a DAG. This manual workflow now requires code written in python 2 and 3. Let's simplify my DAG to 3 steps:\n\nDataflow job that processes data and sets up data for Machine\nLearning Training \nTensorflow ML training job\nOther\nPythonOperators that I wrote using python 3 code\n\nThe dataflow job is written in python 2.7 (required by google) and the tensorflow model code is in python 3. Looking at \"MLEngineTrainingOperator\" in airflow 1.9.0 there is a python_version parameter which sets the \"The version of Python used in training\".\nQuestions:\n\nCan I dynamically specify a specific python version in a worker\nenvironment?\nDo I have to just install airflow on python 2.7 to make step 1) run?\nCan I have tensorflow model code in python 3 that just gets packaged up and submitted via MlEngineTraining running on python 2?\nDo I have to rewrite my 3) operators in python 2?","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":4405,"Q_Id":51201188,"Users Score":4,"Answer":"There isn't a way specify the python version dynamically on a worker. However if you are using the the Celery executor, you can run multiple workers either on difference servers\/vms or in different virtual environments.  \nYou can have one worker running python 3, and one running 2.7, and have each listening to different queues.  This can be done three different ways:\n\nWhen starting the worker you can add a -q [queue-name] flag\nset an env of AIRFLOW__CELERY__DEFAULT_QUEUE\nupdating default_queue under [celery] in the airflow.cfg. \n\nThen in your task definitions specify a queue parameter, changing the queue up depending on which python version the task needs to run.\nI'm not familiar with the MLEngineOperator, but you can specify a python_version in the PythonOperator which should run it in a virtualenv of that version.  Alternative you can use the BashOperator, write the code to run in a different file and specify the python command to run it using the absolute path the version of python you want to use.\nRegardless of how the task is run, you just need to ensure the DAG itself is compatible with python version you are running it as it. ie. if you are going to start an airflow worker in different python versions, the DAG file itself needs to be python 2 & 3 compatible. The DAG can have addition file dependencies that it uses have version incompatibilities.","Q_Score":4,"Tags":"python,tensorflow,google-cloud-dataflow,airflow","A_Id":51209553,"CreationDate":"2018-07-05T23:32:00.000","Title":"Python 3.6 airflow with a Operator that requires 2.7","Data Science and Machine Learning":1,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"How do you manually stop a Python script running on Visual Studio Code?\nI am on Mac. Thanks","AnswerCount":2,"Available Count":2,"Score":0.1973753202,"is_accepted":false,"ViewCount":384,"Q_Id":51226086,"Users Score":2,"Answer":"I'm assuming you are using a terminal, if so then press ctrl+c to stop a script. If taht doesn't work try ctrl+z. These commands should stop any terminal program.","Q_Score":2,"Tags":"python,python-3.x,visual-studio-code","A_Id":51226100,"CreationDate":"2018-07-07T18:51:00.000","Title":"Regarding Python on Visual Studio Code","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"How do you manually stop a Python script running on Visual Studio Code?\nI am on Mac. Thanks","AnswerCount":2,"Available Count":2,"Score":0.0996679946,"is_accepted":false,"ViewCount":384,"Q_Id":51226086,"Users Score":1,"Answer":"For quitting the process and terminating from background aswell. Use CTRL+\\\nYou can stop the interactive python by using CTRL+D.\nFor stopping python scripts use CTRL+Z. (Process won't be terminated though. Use killall for that.)\nTo terminate all python scripts running in background. Run killall python or sudo killall python. Run with caution\nAnd to stop other scripts use CTRL+C","Q_Score":2,"Tags":"python,python-3.x,visual-studio-code","A_Id":51226312,"CreationDate":"2018-07-07T18:51:00.000","Title":"Regarding Python on Visual Studio Code","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Recently I converted a .py file to a .exe file.\nI lost the original .py file and I'm left with the exe file.\nI converted it with pyinstaller.\nIs there anyway to reverse this to get my original .py file back?","AnswerCount":3,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":24024,"Q_Id":51227091,"Users Score":0,"Answer":"It doesnt create the .pyc file at all i typed \"python pyinstxtractor.py spam.exe\" spam is my .exe name","Q_Score":11,"Tags":"python,python-2.7,pyinstaller","A_Id":70595963,"CreationDate":"2018-07-07T21:31:00.000","Title":"How to convert exe back to Python script","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I need to write a python script to read a large logfile (1GB+), extract IP addresses in each line, store these IPs, remove duplicates, locate in another files the the hostnames related to these IPs and rewrite the hostnames to a new logfile containing the original data.\nNow the question: What is the best way to deal with memory, files, etc? I mean, I see two approaches:\n\nRead the original logfile, extract IPs and write to a new file (tmp_IPS.txt, remove dupes, search these IPs line by line on another files (hostnames.txt), write the results to tmp_IPS.txt, read and rewrite original logfile. In this case, I will process less IPs (without the dupes).\nRead the original logfile, read the IPs and search each IP on the hostnames.txt, write the rows on original logfile + hostnames. In this case, I will process a lot of duplicated IPs. I can also write the found IPs and hostnames to a new file or to memory, but I really don't know what is better.","AnswerCount":4,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":950,"Q_Id":51255950,"Users Score":0,"Answer":"The most efficient way to deal with large log files in this case is to read and write at the same time, line by line, to avoid loading large files into memory. You should load the IP-to-hostname mapping file hostnames.txt in to a dict first if hostnames.txt is relatively small; otherwise you should consider storing the mapping in an indexed database)","Q_Score":0,"Tags":"python,memory,file-io","A_Id":51256102,"CreationDate":"2018-07-10T01:09:00.000","Title":"The most efficient (or professional) way to read, proccess and write a file with Python?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"In my python code, I need to kill any java.exe subprocess, I am using subprocess.call(\"taskkill \/f \/im java.exe\"), this is working fine when java.exe subprocess exists but it failed with \"ERROR: The process \"java.exe\" not found\" if java.exe subprocess does not exist, so I want to know if there is any way to detect if any java.exe subprocess is running and then try to kill it.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":214,"Q_Id":51261815,"Users Score":0,"Answer":"You can use subprocess.call to run tasklist or wmic process get description first to get a full list of running processes and see if java.exe is among them.","Q_Score":0,"Tags":"python,subprocess","A_Id":51262036,"CreationDate":"2018-07-10T09:34:00.000","Title":"How to conditionally use subprocess.call(\"taskkill \/f \/im java.exe\")","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I have a Python program using a RotatingFileHandler for logging.  The logging file handler opens the logfile in exclusive mode (once) and keeps it open until the app closes.  The problem is that I need to allow other processes to read the logfile while the Python program is still running.\nIn past projects using C++, I created a queued logger.  It maintained a queue of log entries.  A secondary worker thread would regularly check the queue and if there were any entries, open the logfile, dump the entries to the file, and immediately close the file until more log entries are queued.  This meant that (in processor time) >99% of the time, the file would be closed and available for other processes to peek into the logfile.\n(From a bit of digging, I'm under the impression that the Python logging class already handles the queuing of log entries...  That's not the part I'm asking about.)\nIs there a simple way to accomplish a normally-closed logfilehandler in Python?  (Preferably without having to add a 3rd party library or subsystem.)","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":79,"Q_Id":51274541,"Users Score":0,"Answer":"To me it seems that creating a separate thread managing this specific topic. As you pointed would be the best strategy.\nThe thread could perform read\/write for every other programs.\nYou can perfectly design this thread in python using the logging library.\nAnother strategy would be to use a system such as Sentry or Kibana","Q_Score":1,"Tags":"python,logging,logfile","A_Id":51274558,"CreationDate":"2018-07-10T22:06:00.000","Title":"Looking for a Python approach to normally-closed logfiles","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"What is the difference between $PATH variable, sys.path and os.environ? I understand that they both serve as paths where python searches packages. But it'd be nice to have more elaborate response.\nJust a working case from my practice is when I used the script with only os.environ before import on Ubuntu 16.04 I got ImportError: No module named XXX. At the same time on MacOS it worked well. After I added sys.path on Ubuntu I could get import module well.\nThanks for the explanation at Advance.","AnswerCount":2,"Available Count":1,"Score":0.3799489623,"is_accepted":false,"ViewCount":8363,"Q_Id":51288512,"Users Score":4,"Answer":"sys.path\nIs a list of strings that specifies the search path for modules. Initialized from the environment variable PYTHONPATH, plus an installation-dependent default.\nos.environ\nIs a mapping object representing the string environment. For example, environ['HOME'] is the pathname of your home directory (on some platforms), and is equivalent to getenv(\"HOME\") in C.\nEnvironment variable PATH\nSpecifies a set of directories where executable programs are located. In general, each executing process or user session has its own PATH setting.","Q_Score":17,"Tags":"python-3.x","A_Id":51291905,"CreationDate":"2018-07-11T14:48:00.000","Title":"Difference between $PATH, sys.path and os.environ","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I need to get pip3 running on my Mac terminal for a project. I have python3 installed, and I can run it, but when I try to run pip3 freeze, it says my command is not found.\nI thought it would be automatically installed when I installed Python3. I tried to sudo install it, but it still didn't do anything. What can I do?","AnswerCount":4,"Available Count":1,"Score":-0.0996679946,"is_accepted":false,"ViewCount":2599,"Q_Id":51334492,"Users Score":-2,"Answer":"You could try brew install pip3. Or check where pip is installed, that might point to Python 3's version.","Q_Score":0,"Tags":"python,python-3.x,macos,pip","A_Id":51334542,"CreationDate":"2018-07-14T01:32:00.000","Title":"Python3 running on Mac but no Pip3?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm a beginner in programming and atom so when try to run my python code written in the atom in terminal I don't know how...i tried installing packages like run-in-terminal,platformio-ide-terminal but I don't know how to use them.","AnswerCount":3,"Available Count":3,"Score":0.0665680765,"is_accepted":false,"ViewCount":7068,"Q_Id":51345748,"Users Score":1,"Answer":"I would not try to do it using extensions. I would use the platformio-ide-terminal and just do it from the command line. \nJust type: Python script_name.py and it should run fine.  Be sure you are in the same directory as your python script.","Q_Score":0,"Tags":"python,ubuntu,terminal,atom-editor","A_Id":51351691,"CreationDate":"2018-07-15T06:08:00.000","Title":"how to run python code in atom in a terminal?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm a beginner in programming and atom so when try to run my python code written in the atom in terminal I don't know how...i tried installing packages like run-in-terminal,platformio-ide-terminal but I don't know how to use them.","AnswerCount":3,"Available Count":3,"Score":0.0,"is_accepted":false,"ViewCount":7068,"Q_Id":51345748,"Users Score":0,"Answer":"\"python filename.py\" should run your python code. If you wish to specifically run the program using python 3.6 then it would be \"python3.6 filename.py\".","Q_Score":0,"Tags":"python,ubuntu,terminal,atom-editor","A_Id":51345815,"CreationDate":"2018-07-15T06:08:00.000","Title":"how to run python code in atom in a terminal?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm a beginner in programming and atom so when try to run my python code written in the atom in terminal I don't know how...i tried installing packages like run-in-terminal,platformio-ide-terminal but I don't know how to use them.","AnswerCount":3,"Available Count":3,"Score":0.0665680765,"is_accepted":false,"ViewCount":7068,"Q_Id":51345748,"Users Score":1,"Answer":"Save your Script as a .py file in a directory.\nOpen the terminal and navigate to the directory containing your script using cd command.\nRun python <filename>.py if you are using python2\nRun python3 <filename.py> if you are using python3","Q_Score":0,"Tags":"python,ubuntu,terminal,atom-editor","A_Id":51345813,"CreationDate":"2018-07-15T06:08:00.000","Title":"how to run python code in atom in a terminal?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am using Visual Studio Code on Linux Sabayon (Gnome) and when I want to save any .py files I have to write the admin password for each one. Is there some settings that may fix it?  \nI know that I can run Visual Studio Code  as admin but that's not the best option for me.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":274,"Q_Id":51350907,"Users Score":0,"Answer":"Try putting the saved file in a folder on your desktop. \nSaving files in non-user directories (directories that don't refer to YOUR user) may need admin permissions.\nThis method should work on ALL PC platforms.","Q_Score":0,"Tags":"python,visual-studio-code,vscode-settings","A_Id":51351258,"CreationDate":"2018-07-15T18:11:00.000","Title":"How to save .py files in VSCode on linux and write the admin password only once?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"in the last couple of days I was developing an APP on python IDLE.\nI tried to import the vlc module, when I run it I get this error:\nOSError: dlopen(libvlccore.dylib, 6): image not found\nI installed the module with this command: pip install python-vlc.\nI hope you can help me getting it work!\nThanks in advance!\nZaid Zaim","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":1552,"Q_Id":51353360,"Users Score":0,"Answer":"brew install --cask vlc\nIs the latest command, and it works for me!","Q_Score":1,"Tags":"python","A_Id":71231101,"CreationDate":"2018-07-16T00:50:00.000","Title":"Python 2.7.14--- importing vlc module on mac OS","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"The accepted way of building manylinux C++ extensions for python is to build them on a docker using Centos 5.5 as the underlying OS. My extensions have a boost library dependency. With care I can use yum to install Boost 1.44 libraries into the dockers used to build python extensions, and this is the version I currently use. However, this restricts me, and although I use current versions of boost on my builds of these extensions for IOS and Windows, I have to be very careful that the code still works the same for the historic boost version 1.44 on Linux. \nWhat is the best maintainable approach to this. How do I upgrade the boost libraries in my docker while maintaining the Centos 5.5 expected for manylinux compatibility? Can I achieve current boost compatibility?","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":242,"Q_Id":51358664,"Users Score":1,"Answer":"In such cases, I usually build and install my own version of boost (e.g. 1.63) in a local directory of mine. Now, for linking any applications to the new libraries, I use LD_LIBRARY_PATH to tell the linker which boost libraries to use.","Q_Score":2,"Tags":"c++,docker,boost,centos,python-manylinux","A_Id":51359451,"CreationDate":"2018-07-16T09:32:00.000","Title":"How to have two different versions of boost on CentOS 5.5?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Is there a way to completely disable cookies from the Tornado server?  I'm not using them for my public-facing site and I don't want to have the annoying pop-up to get European compliance.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":101,"Q_Id":51365906,"Users Score":0,"Answer":"The only time Tornado sets cookies on its own is if you use the xsrf_cookies application setting. If you turn that off and there are no other calls to set_cookie or set_secure_cookie in your application, no cookies will be set. \nXSRF is a serious security issue and you should carefully consider whether you need an alternative solution if you don't use xsrf_cookies. However, if you don't have any other cookies (or equivalent forms of authentication), you're probably OK.","Q_Score":0,"Tags":"python,cookies,tornado","A_Id":51372029,"CreationDate":"2018-07-16T16:01:00.000","Title":"Turn off cookies in Tornado","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I am trying to create a Monitor script that monitors all the threads or a huge python script which has several loggers running, several thread running.\nFrom Monitor.py i could run subprocess and forward the STDOUT which might contain my status of the threads.. but since several loggers are running i am seeing other logging in that.. \nQuestion: How can run the main script as a separate process and get custom messages, thread status without interfering with logging. ( passing PIPE as argument ? )\nMain_Script.py * Runs Several Threads * Each Thread has separate Loggers.\nMonitor.py * Spins up the Main_script.py * Monitors the each of the threads in MainScript.py ( may be obtain other messages from Main_script in the future)\nSo Far, I tried subprocess, process from Multiprocessing.\nSubprocess lets me start the Main_script and forward the stdout back to monitor but I see the logging of threads coming in through the same STDOUT. I am using the \u201cimport logging \u201c Library to log the data from each threads to separate files.\nI tried \u201cprocess\u201d from Multiprocessing. I had to call the main function of the main_script.py as a process and send a PIPE argument to it from monitor.py. Now I can\u2019t see the Main_script.py as a separate process when I run top command.","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":1713,"Q_Id":51369002,"Users Score":1,"Answer":"Normally, you want to change the child process to work like a typical Unix userland tool: the logging and other side-band information goes to stderr (or to a file, or syslog, etc.), and only the actual output goes to stdout.\nThen, the problem is easy: just capture stdout to a PIPE that you process, and either capture stderr to a different PIPE, or pass it through to real stderr.\n\nIf that's not appropriate for some reason, you need to come up with some other mechanism for IPC: Unix or Windows named pipes, anonymous pipes that you pass by leaking the file descriptor across the fork\/exec and then pass the fd as an argument, Unix-domain sockets, TCP or UDP localhost sockets, a higher-level protocol like a web service on top of TCP sockets, mmapped files, anonymous mmaps or pipes that you pass between processes via a Unix-domain socket or Windows API calls, \u2026\nAs you can see, there are a huge number of options. Without knowing anything about your problem other than that you want \"custom messages\", it's impossible to tell you which one you want.\nWhile we're at it: If you can rewrite your code around multiprocessing rather than subprocess, there are nice high-level abstractions built in to that module. For example, you can use a Queue that automatically manages synchronization and blocking, and also manages pickling\/unpickling so you can just pass any (picklable) object rather than having to worry about serializing to text and parsing the text. Or you can create shared memory holding arrays of int32 objects, or NumPy arrays, or arbitrary structures that you define with ctypes. And so on. Of course you could build the same abstractions yourself, without needing to use multiprocessing, but it's a lot easier when they're there out of the box.\n\nFinally, while your question is tagged ipc and pipe, and titled \"Interprocess Communication\", your description refers to threads, not processes. If you actually are using a bunch of threads in a single process, you don't need any of this.\nYou can just stick your results on a queue.Queue, or store them in a list or deque with a Lock around it, or pass in a callback to be called with each new result, or use a higher-level abstraction like concurrent.futures.ThreadPoolExecutor and return a Future object or an iterator of Futures, etc.","Q_Score":0,"Tags":"python,pipe,ipc","A_Id":51369154,"CreationDate":"2018-07-16T19:36:00.000","Title":"Interprocess Communication between two python scripts without STDOUT","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"It really bugs (ha.) me that PyCharm executes scripts ever so slightly differently than plain command line execution. It makes project and package configuration hard for a relative newbie like me.\nProblem: Every time a script is run, either normally or in the Python console (Run > Edit conf.) the script folder and the project root are automagically appended to sys.path. I'd expect either one, but not both.\nSo, is there a way to disable or otherwise configure this appending? I'd like to do it without manipulating the path in the beginning of every executable script, but if there's a way to use a startup script or a run script of some sort, that'd be fine.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":300,"Q_Id":51401774,"Users Score":4,"Answer":"Go to \nRun->Edit Configurations\nThere are, among other things, two checkboxes:\n\nAdd content root to PYTHONPATH\nAdd source root to PYTHONPATH\n\nthat should control the described behaviour of adding the directories to the path.","Q_Score":2,"Tags":"python,path,pycharm,pythonpath","A_Id":51401872,"CreationDate":"2018-07-18T12:15:00.000","Title":"Prevent PyCharm from extending sys.path","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"recently installed PyCharm edu 2018 and there is no Terminal option at all. There is Python console in View\/Tool Windows as well as Event Log etc. But no terminal.\nMy MacBook had Python 2.7 by default, i also installed 3.7 and then installed pycharm. OS 10.13.1\nThere is no Terminal in PyCharm\/Preferences as well. Any way to get it? Is there any difference between EDU edition and community edition?\nIn Windows, Community edition 2018 is having the terminal option.\nThanks a lot.","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":141,"Q_Id":51403736,"Users Score":0,"Answer":"In the top menu bar, go to \nView -> Tool Windows -> Terminal or on enter Alt + F12","Q_Score":2,"Tags":"python,macos,terminal,pycharm","A_Id":51408212,"CreationDate":"2018-07-18T13:48:00.000","Title":"PyCharm 2018 for Mac - there is no terminal option at all","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"recently installed PyCharm edu 2018 and there is no Terminal option at all. There is Python console in View\/Tool Windows as well as Event Log etc. But no terminal.\nMy MacBook had Python 2.7 by default, i also installed 3.7 and then installed pycharm. OS 10.13.1\nThere is no Terminal in PyCharm\/Preferences as well. Any way to get it? Is there any difference between EDU edition and community edition?\nIn Windows, Community edition 2018 is having the terminal option.\nThanks a lot.","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":141,"Q_Id":51403736,"Users Score":0,"Answer":"That is correct PyCharm Edu does not have a terminal in Windows either. Only PyCharm Community has a terminal option. I did a lot of research and did not find any option to get a terminal for Edu.","Q_Score":2,"Tags":"python,macos,terminal,pycharm","A_Id":51413899,"CreationDate":"2018-07-18T13:48:00.000","Title":"PyCharm 2018 for Mac - there is no terminal option at all","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have downloaded pyOpt from its website and installed it on python in ubuntu, using the instructions on the website. \nStill, I cannot import and use it in my pycharm projects.","AnswerCount":3,"Available Count":1,"Score":0.0665680765,"is_accepted":false,"ViewCount":334,"Q_Id":51407746,"Users Score":1,"Answer":"I had the same problem, but I did not dare to try Akin's solution for my research project (I think it is a good solution if anyone wants to stick to PyOpt package with python3). \nI used Pyomo instead.\nBy the way, Laurent's answer actually points to another package. PyOpt and pyopt are two different packages.","Q_Score":0,"Tags":"python,pycharm","A_Id":61829940,"CreationDate":"2018-07-18T17:22:00.000","Title":"Installing pyOpt on python in ubuntu","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I did the following\n\nInstall python (2.7) on windows using official setup file from python.org\nCreated a virtual env using the same interpreter\nInstalled ipython in the virtual env\n\nWhen I run ipython from windows commandline, everything works good. I get the colors and autocomplete. But when I run inside cygwin bash, there are no colors and autocomplete does not work. I also installed pyreadline package in the same virtual env but didn't fix it. Any clues?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":345,"Q_Id":51409519,"Users Score":0,"Answer":"Not just ipython. Most native windows programs (especially the interactive ones) don't work good in cygwin terminal.\nPossible options:\n\nInstall cygwin version of the program. Python\/ipython can be installed inside cygwin\nRun in dos\/power shell\nStart bash in powershell and start the native program within it. \nInstall Ubuntu or other linux on WSL (Windows Subsystem for Linux)","Q_Score":0,"Tags":"python,python-2.7,cygwin,ipython","A_Id":51770564,"CreationDate":"2018-07-18T19:18:00.000","Title":"ipython in cygwin does not have autocomplete","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"So this is an odd issue.\npython script.py -a 1234 works\n\/usr\/bin\/python \/tmp\/script.py -a 1234 works\nnc 127.0.0.1 443 -e \/bin\/bash works\nnc 127.0.0.1 443 -e \/usr\/bin\/python \/tmp\/script.py -a 1234 fails with all-A-records NIY\nnc 127.0.0.1 443 -e \"\/usr\/bin\/python \/tmp\/script.py -a 1234\" fails with failed : No such file or directory\nAm I missing something here? I'm not sure why this isn't working.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":941,"Q_Id":51412941,"Users Score":0,"Answer":"Okay I'm not sure what's up with netcat but doing an old fashion bash reverse shell works just fine and solves the problem.\n\/usr\/bin\/python -u \/tmp\/script.py >& \/dev\/tcp\/127.0.0.1\/443 0>&1\nA quick note here, make sure you include the -u otherwise you'll get the incoming data from the socket but nothing output from your script will get sent back over the socket.","Q_Score":2,"Tags":"python,bash,netcat,parrot-os","A_Id":51413112,"CreationDate":"2018-07-19T01:10:00.000","Title":"NetCat Execute - File Not Found","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Everytime I run docker-compose up on my machine (macOS 10.13.5, latest docker version) I get this error\n\nTraceback (most recent call last):   File \"docker-compose\", line 6, in\n     File \"compose\/cli\/main.py\", line 71, in main   File\n  \"compose\/cli\/main.py\", line 124, in perform_command   File\n  \"compose\/cli\/command.py\", line 41, in project_from_options   File\n  \"compose\/cli\/command.py\", line 126, in get_project   File\n  \"compose\/project.py\", line 96, in from_config   File\n  \"compose\/network.py\", line 320, in get_networks   File\n  \"compose\/network.py\", line 125, in true_name   File\n  \"compose\/network.py\", line 146, in _set_legacy_flag   File\n  \"compose\/network.py\", line 106, in inspect   File\n  \"site-packages\/docker\/utils\/decorators.py\", line 19, in wrapped   File\n  \"site-packages\/docker\/api\/network.py\", line 211, in inspect_network\n  File \"site-packages\/docker\/utils\/decorators.py\", line 46, in inner\n  File \"site-packages\/docker\/api\/client.py\", line 194, in _get   File\n  \"site-packages\/requests\/sessions.py\", line 521, in get   File\n  \"site-packages\/requests\/sessions.py\", line 494, in request   File\n  \"site-packages\/requests\/sessions.py\", line 424, in prepare_request\n  File \"site-packages\/requests\/utils.py\", line 195, in get_netrc_auth\n  File \"netrc.py\", line 33, in init   File \"netrc.py\", line 42, in\n  _parse   File \"shlex.py\", line 105, in get_token   File \"shlex.py\", line 136, in read_token   File\n  \"\/Users\/distiller\/compose-osx-release\/compose\/venv\/lib\/python3.6\/codecs.py\",\n  line 321, in decode UnicodeDecodeError: 'utf-8' codec can't decode\n  byte 0x80 in position 33: invalid start byte","AnswerCount":4,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":3258,"Q_Id":51423379,"Users Score":0,"Answer":"I have 2 ideas:\n1. try to reinstall your python\n2. use not the latest docker version, but the latest stable","Q_Score":4,"Tags":"python,python-3.x,docker,docker-compose","A_Id":51423509,"CreationDate":"2018-07-19T13:02:00.000","Title":"docker-compose up: utf-8 codec can't decode byte X","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Everytime I run docker-compose up on my machine (macOS 10.13.5, latest docker version) I get this error\n\nTraceback (most recent call last):   File \"docker-compose\", line 6, in\n     File \"compose\/cli\/main.py\", line 71, in main   File\n  \"compose\/cli\/main.py\", line 124, in perform_command   File\n  \"compose\/cli\/command.py\", line 41, in project_from_options   File\n  \"compose\/cli\/command.py\", line 126, in get_project   File\n  \"compose\/project.py\", line 96, in from_config   File\n  \"compose\/network.py\", line 320, in get_networks   File\n  \"compose\/network.py\", line 125, in true_name   File\n  \"compose\/network.py\", line 146, in _set_legacy_flag   File\n  \"compose\/network.py\", line 106, in inspect   File\n  \"site-packages\/docker\/utils\/decorators.py\", line 19, in wrapped   File\n  \"site-packages\/docker\/api\/network.py\", line 211, in inspect_network\n  File \"site-packages\/docker\/utils\/decorators.py\", line 46, in inner\n  File \"site-packages\/docker\/api\/client.py\", line 194, in _get   File\n  \"site-packages\/requests\/sessions.py\", line 521, in get   File\n  \"site-packages\/requests\/sessions.py\", line 494, in request   File\n  \"site-packages\/requests\/sessions.py\", line 424, in prepare_request\n  File \"site-packages\/requests\/utils.py\", line 195, in get_netrc_auth\n  File \"netrc.py\", line 33, in init   File \"netrc.py\", line 42, in\n  _parse   File \"shlex.py\", line 105, in get_token   File \"shlex.py\", line 136, in read_token   File\n  \"\/Users\/distiller\/compose-osx-release\/compose\/venv\/lib\/python3.6\/codecs.py\",\n  line 321, in decode UnicodeDecodeError: 'utf-8' codec can't decode\n  byte 0x80 in position 33: invalid start byte","AnswerCount":4,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":3258,"Q_Id":51423379,"Users Score":0,"Answer":"What worked for me was creating an empty .env file in the directory I run docker-compose in (encoded as UTF-8).","Q_Score":4,"Tags":"python,python-3.x,docker,docker-compose","A_Id":60111921,"CreationDate":"2018-07-19T13:02:00.000","Title":"docker-compose up: utf-8 codec can't decode byte X","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Should I create a directory in my virtualenv and save the source code for that specific project there? \nThanks in advance","AnswerCount":2,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":1454,"Q_Id":51459394,"Users Score":1,"Answer":"You can save your project anywhere. But you should activate the virtual environment before working on that project.\nYou can activate the virtual environment using the following command.\nsource path-to-virtualenvironment\/bin\/activate\nAfter activating the virtual environment move to your project location.","Q_Score":1,"Tags":"python,virtualenv","A_Id":51459493,"CreationDate":"2018-07-21T19:25:00.000","Title":"Where should source code be saved when working with virtualenv?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Apologies if my question is stupid. \nI am a newbie is all aspects.\nI used to run my python code straight from the terminal in Linux Ubuntu, \ne.g. I just open the terminal go to my folder and run my command in my Linux terminal \nCUDA_VISIBLE_DEVICES=0 python trainval_net.py --dataset pascal_voc --net resnet101 --epochs 7  --bs 1 --nw 4 --lr 1e-3 --lr_decay_step 5 --cuda\nnow im trying to use Spyder.\nSo for the same project i have a folder with bunch of functions\/folders\/stuff inside it.\nSo i just open that main folder as a new project, then i have noo idea how i can run my code...\nThere is a console in the right side of spyder which looks like Ipython and i can do stuff in there, but i cannot run the code that i run in terminal there.\nIn iphython or jupyther i used to usee ! at the begining of the command but here when i do it (e.g. !CUDA_VISIBLE_DEVICES=0 python trainval_net.py --dataset pascal_voc --net resnet101 --epochs 7  --bs 1 --nw 4 --lr 1e-3 --lr_decay_step 5 --cuda) it does not even know the modules and throw errors (e.g. ImportError: No module named numpy`)\nCan anyone tell me how should i run my code here in Spyder\nThank you in advance! :)","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":447,"Q_Id":51461427,"Users Score":0,"Answer":"Okay I figured it out.\nI need to go to run->configure per file and in the command line options put the configuration (--dataset pascal_voc --net resnet101 --epochs 7  --bs 1 --nw 4 --lr 1e-3 --lr_decay_step 5 --cuda)","Q_Score":0,"Tags":"python-3.x,anaconda,ubuntu-16.04,spyder","A_Id":51467364,"CreationDate":"2018-07-22T01:51:00.000","Title":"How run my code in spyder as i used to run it in linux terminal","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I just installed Anaconda to use it for python, however, whenever I try to launch the navigator it crashes straight away. \nI have tried reinstalling, even opening cmd and typing \"conda update conda\" but all I get is \n\"\nUnable to create process using 'C:\\Users\\Fierce PC\\Anaconda3\\python.exe \"**C:\\Users\\Fierce PC\\Anaconda3\\Scripts\\conda-script.py\" update conda' \nUnable to create process using 'C:\\Users\\Fierce PC\\Anaconda3\\python.exe \"C:\\Users\\Fierce PC\\Anaconda3\\Scripts\\conda-script.py\" shell.cmd.exe reactivate'**\n\"\nPlease, can someone tell me what i am doing wrong?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":3361,"Q_Id":51466294,"Users Score":0,"Answer":"You have to go into start and use the anaconda (prompt) in your start menu.","Q_Score":1,"Tags":"python,crash,installation,anaconda","A_Id":63623493,"CreationDate":"2018-07-22T14:52:00.000","Title":"Anaconda Crashes Every time I launch","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Just wondering if there is any way to install Deep Mind's Sonnet library with Anaconda yet. On the site it says to use conda install -c hcc dm-sonnet, however that provides a PackageNotFoundError because this method only works on Linux distributions and I'm currently using macOS. \nIf this is not possible and I use pip to install the Sonnet package, will this produce any errors since I use conda as my main distribution system?\nThanks!","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":665,"Q_Id":51501890,"Users Score":1,"Answer":"Anaconda comes with it's own pip and packages installed with that will work fine together with the rest of your anaconda environment. Try to run which pip and see if that is in the anaconda path.\nThere can be some issues if the dependencies required from pip doesn't match up with what is required in your anaconda environment. However you can always pip uninstall if it breaks anything.","Q_Score":0,"Tags":"python,tensorflow,anaconda","A_Id":51502157,"CreationDate":"2018-07-24T15:02:00.000","Title":"Installing Sonnet with Anaconda","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a Python Kafka worker run by a bash script in a Docker image inside a docker-compose setup that I need to reload and restart whenever a file in its directory changes, as I edit the code. Does anyone know how to accomplish this for a bash script?\nPlease don't merge this with the several answers about running a script whenever a file in a directory changes. I've seen other answers regarding this, but I can't find a way to run a script once, and then stop, reload and re-run it if any files change.\nThanks!","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":260,"Q_Id":51507787,"Users Score":1,"Answer":"My suggestion is to let docker start a wrapper script that simply starts the real script in the background.\nThen in an infinite loop:\n\nusing inotifywait the wrapper waits for the appropriate change\nthen kills\/stop\/reload\/... the child process \nstarts a new one in the background again.","Q_Score":0,"Tags":"python,bash,unix,filesystems,reload","A_Id":51511825,"CreationDate":"2018-07-24T21:28:00.000","Title":"How do you setup script RELOAD\/RESTART upon file changes using bash?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"When I type \"Python\" into the Windows 10 command prompt I get the error \"'python' is not recognized as an internal or external command, operable program or batch file.\" I've tried adding \"C:\\Python27\" to the \"Path\" environment variable, but it never works. It doesn't work for the as a user variable or a system variable.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":2236,"Q_Id":51523826,"Users Score":0,"Answer":"Python might not be in your PATH.  Check the environment variables and ensure c:\\python27 is in the PATH.","Q_Score":0,"Tags":"python,error-handling,environment-variables,command-prompt","A_Id":51523988,"CreationDate":"2018-07-25T16:36:00.000","Title":"Python Environment Variable Not Working","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I've scrolled the internet all over and theres no simple, clean explanation for this. How can I open the Python shell, but inside a terminal window such as CMD? I have an application for it, but want to run it inside a terminal, so I can practice Python code inside my IDE like VS code.","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":1327,"Q_Id":51529616,"Users Score":0,"Answer":"If you have a reasonably new version of Python you need to run py.exe (or just py) instead of python.exe, because the real python executable (python.exe) is not in your path environment variable by default, whereas py.exe is in the \/windows directory and thus automatically in path.\nSo to run your script type py yourscript.py from the directory of your script. If you just run py it will start the interactive interpreter.","Q_Score":0,"Tags":"python","A_Id":51529746,"CreationDate":"2018-07-26T01:07:00.000","Title":"How to run the python shell inside a terminal in Windows?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I would like to schedule a .pyw script in Task Scheduler on Windows. When I double click on the file, everything works properly, the program does what it should do. I successfully create a task in Task Scheduler:\n-'Run with highest privileges' checked\n-Configure for Windows 10\n-'At system startup' trigger\n-Action: 'Start a program' and I provide the full path to the .pyw script\n-I have also unchecked 'Start the task only if the computer is on AC power'\n..and when I do right click --> Run, I get a standard question: \"How do you want to open this file\" etc. Now, status of the task is 'Running', but nothing happens, and I cannot find my program running in Task Manager. Any advice?","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":616,"Q_Id":51541502,"Users Score":1,"Answer":"You should provide a full path to the python interpreter and in the optional parameters add the path to your script.\nJust like in cmd, when you run a python script, you type python first, works the same with the task scheduler.","Q_Score":2,"Tags":"python,windows,taskscheduler","A_Id":51541652,"CreationDate":"2018-07-26T14:38:00.000","Title":"Schedule and MANUALLY run .pyw script in Task Scheduler on Windows","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm trying to invoke the gsutil command from a cell in a Jupyter notebook, using the bash cell magic %%bash, as such:\n%%bash\ngsutil\n\nHowever I am receiving the following output:\nbash: line 1: gsutil: command not found\nOn the other hand, using the exclamation mark syntax gives me the expected result:\n!gsutil\nGives...\nUsage: gsutil [-D] [-DD] [-h header]... [-m] [-o] [-q] [command [opts...] args...]\nAvailable commands:\n  acl             Get, set, or change bucket and\/or object ACLs\n  cat             Concatenate object content to stdout......\nThe ! syntax doesn't support multi-line commands, and even if it did, as I am collaborating with others, I need the %%bash syntax to work for me.\nCan anyone enlighten me as to what the reason behind this is and how I can go about solving it?\nThanks in advance.","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":4441,"Q_Id":51548928,"Users Score":0,"Answer":"I got around this by using the %%cmd magic instead, which I was unaware of. I'll still have to do some tweaking of the bash commands as there are some slight inconsistencies, but still better than nothing.","Q_Score":1,"Tags":"python,bash,jupyter-notebook,jupyter","A_Id":51549127,"CreationDate":"2018-07-26T23:46:00.000","Title":"Bash cell magic (%%) giving \"command not found\" error in Jupyter notebook (Windows 7)","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am about to decide on programming language for the project.\nThe requirements are that some of customers want to run application on isolated servers without external internet access.\nTo do that I need to distribute application to them and cannot use SaaS approach running on, for example, my cloud (what I'd prefer to do...).\nThe problem is that if I decide to use Python for developing this, I would need to provide customer with easy readable code which is not really what I'd like to do (of course, I know about all that \"do you really need to protect your source code\" kind of questions but it's out of scope for now).\nOne of my colleagues told me about Docker. I can find dozen of answers about Docker container security. Problem is all that is about protecting (isolating) host from code running in container.\nWhat I need is to know if the Python source code in the Docker Image and running in Docker Container is secured from access - can user in some way (doesn't need to be easy) access that Python code?\nI know I can't protect everything, I know it is possible to decompile\/crack everything. I just want to know the answer just to decide whether the way to access my code inside Docker is hard enough that I can take the risk.","AnswerCount":4,"Available Count":3,"Score":0.1488850336,"is_accepted":false,"ViewCount":5631,"Q_Id":51552706,"Users Score":3,"Answer":"Python programs are distributed as source code. If it can run on a client machine, then the code is readable on that machine. A docker container only contains the application and its libraries, external binaries and files, not a full OS. As the security can only be managed at OS level (or through encryption) and as the OS is under client control, the client can read any file on the docker container, including your Python source.\nIf you really want to go that way, you should consider providing a full Virtual Machine to your client. In that case, the VM contains a full OS with its account based security (administrative account passwords on the VM can be different from those of the host). Is is far from still waters, because it means that the client will be enable to setup or adapt networking on the VM among other problems...\nAnd you should be aware the the client security officer could emit a strong NO when it comes to running a non controlled VM on their network. I would never accept it.\nAnyway, as the client has full access to the VM, really securing it will be hard if ever possible (disable booting from an additional device may even not be possible). It is admitted in security that if the attacker has physical access, you have lost.\nTL\/DR: It in not the expected answer but just don't. It you sell your solution you will have a legal contract with your customer, and that kind of problem should be handled at a legal level, not a technical one. You can try, and I have even given you a hint, but IMHO the risks are higher than the gain.","Q_Score":8,"Tags":"python,security,docker,source-code-protection","A_Id":51553497,"CreationDate":"2018-07-27T07:17:00.000","Title":"Is distributing python source code in Docker secure?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am about to decide on programming language for the project.\nThe requirements are that some of customers want to run application on isolated servers without external internet access.\nTo do that I need to distribute application to them and cannot use SaaS approach running on, for example, my cloud (what I'd prefer to do...).\nThe problem is that if I decide to use Python for developing this, I would need to provide customer with easy readable code which is not really what I'd like to do (of course, I know about all that \"do you really need to protect your source code\" kind of questions but it's out of scope for now).\nOne of my colleagues told me about Docker. I can find dozen of answers about Docker container security. Problem is all that is about protecting (isolating) host from code running in container.\nWhat I need is to know if the Python source code in the Docker Image and running in Docker Container is secured from access - can user in some way (doesn't need to be easy) access that Python code?\nI know I can't protect everything, I know it is possible to decompile\/crack everything. I just want to know the answer just to decide whether the way to access my code inside Docker is hard enough that I can take the risk.","AnswerCount":4,"Available Count":3,"Score":0.049958375,"is_accepted":false,"ViewCount":5631,"Q_Id":51552706,"Users Score":1,"Answer":"I know that\u00b4s been more than 3 years, but... looking for the same kind of solution I think that including compiled python code -not your source code- inside the container would be a challenging trial for someone trying to access your valuable source code.\nIf you run pyinstaller --onefile yourscript.py you will get a compiled single file that can be run as an executable. I have only tested it in Raspberry, but as far as I know it\u00b4s the same for, say, Windows.\nOf course anything can be reverse engineered, but hopefully it won\u00b4t be worth the effort to the regular end user.","Q_Score":8,"Tags":"python,security,docker,source-code-protection","A_Id":69979887,"CreationDate":"2018-07-27T07:17:00.000","Title":"Is distributing python source code in Docker secure?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am about to decide on programming language for the project.\nThe requirements are that some of customers want to run application on isolated servers without external internet access.\nTo do that I need to distribute application to them and cannot use SaaS approach running on, for example, my cloud (what I'd prefer to do...).\nThe problem is that if I decide to use Python for developing this, I would need to provide customer with easy readable code which is not really what I'd like to do (of course, I know about all that \"do you really need to protect your source code\" kind of questions but it's out of scope for now).\nOne of my colleagues told me about Docker. I can find dozen of answers about Docker container security. Problem is all that is about protecting (isolating) host from code running in container.\nWhat I need is to know if the Python source code in the Docker Image and running in Docker Container is secured from access - can user in some way (doesn't need to be easy) access that Python code?\nI know I can't protect everything, I know it is possible to decompile\/crack everything. I just want to know the answer just to decide whether the way to access my code inside Docker is hard enough that I can take the risk.","AnswerCount":4,"Available Count":3,"Score":0.049958375,"is_accepted":false,"ViewCount":5631,"Q_Id":51552706,"Users Score":1,"Answer":"I think it could be a solution as using a \"container\" to protect our code from the person we wouldn't let them access. the problem is docker is not a secure container. As the root of the host machine has the most powerful control of the Docker container, we don't have any method to protect the root from accessing inside of the container.\nI just have some ideas about a secure container:\n\nBuild a container with init file like docker file, a password must be set when the container is created;\nonce the container is built, we have to use a password to access inside, including \nreading\\copy\\modify files \nall the files stored on the host machine should be encypt\u3002\nno \"retrieve password\"    or \u201c--skip-grant-\u201d mode is offered. that means nobody can\naccess the data inside the container if u lost the password.\n\nIf we have a trustable container where we can run tomcat or Django server, code obfuscation will not be necessary.","Q_Score":8,"Tags":"python,security,docker,source-code-protection","A_Id":56034690,"CreationDate":"2018-07-27T07:17:00.000","Title":"Is distributing python source code in Docker secure?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am sort of new to python. I can open files in Windows with but am having trouble in Mac. I can open webbrowsers but I am unsure as to how I open other programs or word documents.\nThanks","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":43,"Q_Id":51567959,"Users Score":0,"Answer":"have you tried this code:\nf = open(\"A.txt\")\nfor line in f:\n    print line\nf.close()\nthe file is located within the same directory of program files.\nis there error message?","Q_Score":1,"Tags":"python","A_Id":51567985,"CreationDate":"2018-07-28T04:12:00.000","Title":"Opening files in Mac using python","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have written a python program that periodically runs with ApScheduler package. The .pyw file runs in the background, but when I restart the PC the program doesn't continue running. \nWhat can I do to run a code automatically in startup a windows 10 pc?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":4526,"Q_Id":51622702,"Users Score":4,"Answer":"You should consider putting your python file to the Startup folder.\nClick Win+R at the same time on your keyboard\nType shell:startup\nDrag and drop your python file onto the folder that opened.\nNote: I reccomend to put a shortcut of your python file for easier editing.","Q_Score":4,"Tags":"python,windows,python-3.x,startup,apscheduler","A_Id":51622853,"CreationDate":"2018-07-31T21:59:00.000","Title":"Windows 10 run python program in startup","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm trying to learn python practically.\nI installed PIP via easy_install and then I wanted to play with some mp3 files so I installed eyed3 via pip while in the project directory. Issue is that it installed the module into python 2.7 which comes standard with mac. I found this out as it keeps telling me that when a script does not run due to missing libraries like libmagic and no matter what I do, it keeps putting any libraries I install into 2.7 thus not being found when running python3. \nMy question is how to I get my system to pretty much ignore the 2.7 install and use the 3.7 install which I have.\nI keep thinking I am doing something wrong as heaps of tutorials breeze over it and only one has so far mentioned that you get clashes between the versions. I really want to learn python and would appreciate some help getting past this blockage.","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":68,"Q_Id":51622876,"Users Score":0,"Answer":"Have you tried pip3 install [module-name]?\nThen you should be able to check which modules you've installed using pip3 freeze.","Q_Score":0,"Tags":"python,eyed3,libmagic","A_Id":51622986,"CreationDate":"2018-07-31T22:16:00.000","Title":"How do i get Mac 10.13 to install modules into a 3.x install instead of 2.7","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"How would I configure structlog such that all messages including above info would go to stdout using a KeyValueRenderer while all logging would also go to a file using a JSONRenderer?\nnote: I only want to use structlog, no standard library stuff","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":253,"Q_Id":51627041,"Users Score":0,"Answer":"structlog doesn't do this out of the box, you'll need to write the required code yourself. structlog is built in a way to make this straightforward and it should be around a dozen of LoC.","Q_Score":1,"Tags":"python,json,rendering,stdout,structlog","A_Id":51656861,"CreationDate":"2018-08-01T06:51:00.000","Title":"setting up trees of renderers in structlog","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"Context: I implemented tests which use docker-py to create docker networks and run docker containers. The test runner used to execute the tests is pytest. The test setup depends on Python (Python package on my dev machine), on my dev machines docker daemon and my dev machines static ip address. In my dev machine runtime context the tests run just fine (via plain invocation of the test runner pytest). Now I would like to migrate the tests into gitlab-ci. gitlab-ci runs the job in a docker container which accesses the CI servers docker daemon via \/var\/run\/docker.sock mount. The ip address of the docker container which is uses by gitlab-ci to run the job in is not static like in my dev machine context. But for the creation of the docker networks in the test I need the ip address.\nQuestion: How can I get the appropriate ip address of the docker container the tests are executed in with Python?","AnswerCount":1,"Available Count":1,"Score":-0.1973753202,"is_accepted":false,"ViewCount":2714,"Q_Id":51629194,"Users Score":-1,"Answer":"When you run docker you can share the same network as the host if asked.\nAdd to the run command --network host\nSuch parameter will cause the python network code be the same as you run the code without container.","Q_Score":2,"Tags":"python,docker,gitlab,dockerpy","A_Id":51630443,"CreationDate":"2018-08-01T08:57:00.000","Title":"How can I get the host ip in a docker container using Python?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"When you run a python script from terminal and before it completes running of you control + c  it, it gives a traceback where the code was currently running. Is it possible to see which part of a code is running without terminating it.","AnswerCount":2,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":290,"Q_Id":51632029,"Users Score":1,"Answer":"in pycharm, you can debug by selecting code areas that you want to work, and by pressing next and next, you'll see how does program running it, without terminating it.","Q_Score":2,"Tags":"python,terminal","A_Id":51632138,"CreationDate":"2018-08-01T11:22:00.000","Title":"How to see which part of the code is running in terminal","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Need to install python packages like pip, numpy, cv2 on an Amazon EC2 instance of Ubuntu.  I tried using sudo apt-get install python-pip but got below given error:\nubuntu@ip-172-31-35-131:~$ sudo apt-get install python-pip\nReading package lists... Done\nBuilding dependency tree\nReading state information... Done\nE: Unable to locate package python-pip","AnswerCount":2,"Available Count":1,"Score":1.0,"is_accepted":false,"ViewCount":7302,"Q_Id":51698609,"Users Score":6,"Answer":"Try first sudo apt-get update then\nsudo apt-get install python-pip","Q_Score":5,"Tags":"python,amazon-web-services,ubuntu,amazon-ec2","A_Id":51698637,"CreationDate":"2018-08-05T22:07:00.000","Title":"How to install python packages like pip, numpy on Amazon EC2 - ubuntu","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"This just confuses me and I don't know what it means. I have 3.6.4 installed on my computer(MacOS) but it doesn't want to work.\nI can't think of any solution and don't know what to do.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":9705,"Q_Id":51698662,"Users Score":15,"Answer":"The answer is slightly different wether you are on a Mac or a Linux (I am not that used of Windows for Python working).\n\nInstall\n(MacOS =>) Be sure that the XCode CLI tools are installed on your computer.\nxcode-select --install\nThen, to install the virtualenv, you have to enter the following command.\npyenv install 3.6.4\nHere, you can have some issues regarding the zlib library that is not available. Nevertheless, the XCode CLI should have installed zlib. So you are good to go (it still has some issues on MacOS Mojave nevertheless).\n\nCreate Virtualenv\nThen create a new virtualenv for a future use :\npyenv virtualenv 3.6.4 v3.6.4\n\nCheck\nCheck that everything is ok and that the virtualenv is installed through the following command :\npyenv virtualenvs\n\nUse\nThen you just have to use it. For instance for a local use :\npyenv local v3.6.4\n\nCheck\nCheck that everything is ok:\npyenv local\nand it should show v3.6.4.","Q_Score":8,"Tags":"python,pyenv","A_Id":51727036,"CreationDate":"2018-08-05T22:19:00.000","Title":"pyenv-virtualenv: `3.6.4' is not installed in pyenv","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have made a python script based on the pyautogui module, which controls my mouse and keyboard and can automate some tasks I have at work. \nHowever, sometimes, it doesn't really go as planned and I have to stop the script (even though it might be in the middle of something). The problem is that the terminal window is not in front anymore, so I cannot press ctrl+c. \nI have heard that it is possible to use ctrl+break as well, but it does not seem to work (might be because I have to run the script inside of a remote desktop connection). And the failsafe on pyautogui is to drag the mouse to the top left corner, but it does not seem to work in a remote desktop connection as well. \nIs there some way I can add my own failsafe, or some keyboard combination I can try to stop the ongoing python script, even though the terminal is not accessible?","AnswerCount":2,"Available Count":2,"Score":0.0996679946,"is_accepted":false,"ViewCount":446,"Q_Id":51709371,"Users Score":1,"Answer":"Assuming you're on *nix-like system: just run pkill python in a new terminal to kill all python processes of your user.\nYou can run:\nps ax to find the exact process you want to kill then\nkill -9 <the PID of your process>\nTo start a new tty you can press ctrl + F4 then log in\nIf you're on windows: ctrl+alt+del to the task manager then seek your python process and kill it","Q_Score":0,"Tags":"python,python-3.x,pyautogui","A_Id":51709810,"CreationDate":"2018-08-06T13:57:00.000","Title":"Stop Python script outside of the terminal","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have made a python script based on the pyautogui module, which controls my mouse and keyboard and can automate some tasks I have at work. \nHowever, sometimes, it doesn't really go as planned and I have to stop the script (even though it might be in the middle of something). The problem is that the terminal window is not in front anymore, so I cannot press ctrl+c. \nI have heard that it is possible to use ctrl+break as well, but it does not seem to work (might be because I have to run the script inside of a remote desktop connection). And the failsafe on pyautogui is to drag the mouse to the top left corner, but it does not seem to work in a remote desktop connection as well. \nIs there some way I can add my own failsafe, or some keyboard combination I can try to stop the ongoing python script, even though the terminal is not accessible?","AnswerCount":2,"Available Count":2,"Score":0.0996679946,"is_accepted":false,"ViewCount":446,"Q_Id":51709371,"Users Score":1,"Answer":"On Windows systems, try ctrl+alt+end. This will open the task manager on the computer you are Remote Desktop'd into.","Q_Score":0,"Tags":"python,python-3.x,pyautogui","A_Id":51710032,"CreationDate":"2018-08-06T13:57:00.000","Title":"Stop Python script outside of the terminal","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm having trouble activating the virtualenv in Windows as I am going through the basic book of Learning Python the Hard Way.  Here is what I am getting:\n\nPS C:\\Users\\Owner> virtualenv --system-site-packages .venvs\/lpthw\nUsing base prefix\n  'c:\\users\\owner\\appdata\\local\\programs\\python\\python36' New\n  python executable in C:\\Users\\Owner.venvs\\lpthw\\Scripts\\python.exe\n  Installing setuptools, pip, wheel...done.\nPS C:\\Users\\Owner> ..venvs\\lpthw\\Scripts\\activate\n..venvs\\lpthw\\Scripts\\activate : The term\n  '..venvs\\lpthw\\Scripts\\activate' is not recognized as the name of a\n  cmdlet, function, script file, or operable program. Check the spelling\n  of the name, or if a path was included, verify that the path is\n  correct and try again. At line:1 char:1\n  + ..venvs\\lpthw\\Scripts\\activate\n  + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n      + CategoryInfo          : ObjectNotFound: (..venvs\\lpthw\\Scripts\\activate:String) [], CommandNotFoundException\n      + FullyQualifiedErrorId : CommandNotFoundException","AnswerCount":4,"Available Count":3,"Score":0.0,"is_accepted":false,"ViewCount":4105,"Q_Id":51709724,"Users Score":0,"Answer":"I was also facing the same error when I was trying to activate the environment. I created that environment with vscode terminal. But when I reopen the vscode and run the activate command again, I was successfully able to activate it. So, I guess sometime it need to restart the editor to activate the newly created environment.","Q_Score":1,"Tags":"python,powershell","A_Id":58480514,"CreationDate":"2018-08-06T14:16:00.000","Title":"Virtualenv not activating in Windows 10 PowerShell","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm having trouble activating the virtualenv in Windows as I am going through the basic book of Learning Python the Hard Way.  Here is what I am getting:\n\nPS C:\\Users\\Owner> virtualenv --system-site-packages .venvs\/lpthw\nUsing base prefix\n  'c:\\users\\owner\\appdata\\local\\programs\\python\\python36' New\n  python executable in C:\\Users\\Owner.venvs\\lpthw\\Scripts\\python.exe\n  Installing setuptools, pip, wheel...done.\nPS C:\\Users\\Owner> ..venvs\\lpthw\\Scripts\\activate\n..venvs\\lpthw\\Scripts\\activate : The term\n  '..venvs\\lpthw\\Scripts\\activate' is not recognized as the name of a\n  cmdlet, function, script file, or operable program. Check the spelling\n  of the name, or if a path was included, verify that the path is\n  correct and try again. At line:1 char:1\n  + ..venvs\\lpthw\\Scripts\\activate\n  + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n      + CategoryInfo          : ObjectNotFound: (..venvs\\lpthw\\Scripts\\activate:String) [], CommandNotFoundException\n      + FullyQualifiedErrorId : CommandNotFoundException","AnswerCount":4,"Available Count":3,"Score":0.0,"is_accepted":false,"ViewCount":4105,"Q_Id":51709724,"Users Score":0,"Answer":"As the error states, you typed in an incorrect path when you tried to activate the virtualenv (double dot).\nI am not a PowerShell expert since I use UNIX-based systems, but something like .\\.venvs\\lpthw\\Scripts\\activate should work for you.","Q_Score":1,"Tags":"python,powershell","A_Id":51709889,"CreationDate":"2018-08-06T14:16:00.000","Title":"Virtualenv not activating in Windows 10 PowerShell","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm having trouble activating the virtualenv in Windows as I am going through the basic book of Learning Python the Hard Way.  Here is what I am getting:\n\nPS C:\\Users\\Owner> virtualenv --system-site-packages .venvs\/lpthw\nUsing base prefix\n  'c:\\users\\owner\\appdata\\local\\programs\\python\\python36' New\n  python executable in C:\\Users\\Owner.venvs\\lpthw\\Scripts\\python.exe\n  Installing setuptools, pip, wheel...done.\nPS C:\\Users\\Owner> ..venvs\\lpthw\\Scripts\\activate\n..venvs\\lpthw\\Scripts\\activate : The term\n  '..venvs\\lpthw\\Scripts\\activate' is not recognized as the name of a\n  cmdlet, function, script file, or operable program. Check the spelling\n  of the name, or if a path was included, verify that the path is\n  correct and try again. At line:1 char:1\n  + ..venvs\\lpthw\\Scripts\\activate\n  + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n      + CategoryInfo          : ObjectNotFound: (..venvs\\lpthw\\Scripts\\activate:String) [], CommandNotFoundException\n      + FullyQualifiedErrorId : CommandNotFoundException","AnswerCount":4,"Available Count":3,"Score":0.0,"is_accepted":false,"ViewCount":4105,"Q_Id":51709724,"Users Score":0,"Answer":"This is quite simply because the command \"activate\" is a batch file and expects to be ran from a Command Prompt, not a PowerShell prompt. PowerShell execution is done differently than batch file execution.\nSearch your virtual env provider for Activate.ps1, and either edit the batch file to run that instead, or create a function in your PowerShell profile to do that.","Q_Score":1,"Tags":"python,powershell","A_Id":54013881,"CreationDate":"2018-08-06T14:16:00.000","Title":"Virtualenv not activating in Windows 10 PowerShell","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Using the kubernetes Python API< you have to specify the events to watch? Is it possible to watch all events in the cluster","AnswerCount":2,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":2425,"Q_Id":51735278,"Users Score":1,"Answer":"Yes.\nI am pretty sure that there is a library of Python that already implement this but in my case i implement it using the command: --watch-only\nFor example:\nkubectl get pods --watch-only >  -> will show only the changes in pods.\nCreating python process that collect the info from the  will trigger only new changes.","Q_Score":0,"Tags":"kubernetes,kubernetes-python-client","A_Id":51739752,"CreationDate":"2018-08-07T20:54:00.000","Title":"Is it possible to watch all the events on a Kubernetes cluster using the python API?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am making a program that will call python. I would like to add python in my project so users don't have to download python in order to use it, also it will be better to use the python that my program has so users don't have to download any dependency.\nMy program it's going to be writing in C++ (but can be any language) and I guess I have to call the python that is in the same path of my project?\nLet's say that the system where the user is running already has python and he\/she calls 'pip' i want the program to call pip provided by the python give it by my program and install it in the program directory instead of the system's python?\nIt's that possible? If it is how can I do it?\nReal examples:\nThere are programs that offer a terminal where you can execute python to do things in the program like:\n\nMaya by Autodesk\nNuke by The foundry\nHoudini by Side Effects\n\nNote: It has to be Cross-platform solution","AnswerCount":3,"Available Count":1,"Score":0.0665680765,"is_accepted":false,"ViewCount":73,"Q_Id":51738921,"Users Score":1,"Answer":"In order to run python code, the runtime is sufficient. Under Windows, you can use py2exe to pack your program code together with the python runtime and all recessary dependencies. But pip cannot be used and it makes no sense, as you don't want to develop, but only use the python part.\nTo distribute the complete python installation, like Panda3D does, you'll have to include it in the chosen installer software.","Q_Score":0,"Tags":"python,pythonpath,python-packaging,python-config","A_Id":51739051,"CreationDate":"2018-08-08T05:01:00.000","Title":"How can I pack python into my project?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"This may be a stupid question but I am struggling to import windows related modules into PyCharm while running on Linux Mint. E.g. PyHook, pywin32. I get no module found. Other modules install fine though. I have tried Python 2 and 3. Do I have to program in windows to import these?","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":20,"Q_Id":51750056,"Users Score":1,"Answer":"Yes, you have to. These modules need Windows specific APIs that Linux doesn't have. You might be able to work with a Windows Python under Wine, but this is a fragile setup.","Q_Score":0,"Tags":"python,pycharm","A_Id":51750109,"CreationDate":"2018-08-08T15:09:00.000","Title":"Do you need to be on windows to import windows related modules?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am using a volume when running a docker container with something like docker run --rm --network host --volume $PWD\/some_dir:\/tmp\/some_dir .... Inside the container I am running Python code which creates the directory \/tmp\/some_dir (overrides it in case it's already there) and puts files into there. If I run the docker container on my local dev machine the files are available on my dev machine in \/tmp\/some_dir after running the container.\nHowever if I run the same container as part of a gitlab-ci job (\"docker in docker\", the container is not the image used for the job itself) the files are not accessible in \/tmp\/some_dir (the directory exists).\nWhat could be a reason for the missing files?","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":128,"Q_Id":51767194,"Users Score":0,"Answer":"Did you checked the good directory on the good server ? \nCreating a $PWD\/some_dir in a DinD context, The result should be in a some_dir created in docker user home dir in the server running Gitlab CI container.","Q_Score":2,"Tags":"python,docker,gitlab-ci","A_Id":51767336,"CreationDate":"2018-08-09T12:34:00.000","Title":"Share directory in docker container with parent scope docker container in gitlab-ci?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm trying to achieve the following behaviour: \n\nstart celery task using celery beat\nworker is killed\na new worker initiated\nthe task started over again\n\nfor doing so i set acks_late=True flag, and 'visibility_timeout': 30\nmeaning if the task did not ack in 30 seconds, a new one should be added to the queue\nfrom some reason this does not happen","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":846,"Q_Id":51780526,"Users Score":0,"Answer":"the problem seems to be with gevent\nwhen i monkey.patch_all() the retry mechanism will not work","Q_Score":0,"Tags":"python,redis,celery","A_Id":51794671,"CreationDate":"2018-08-10T06:44:00.000","Title":"celery with redis broker visibility timeout","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I need help on how to write a script that configures an applications (VLC) settings to my needs without having to do it manually myself. The reason for this is because I will eventually need to start this application on boot with the correct settings already configured. \nSteps I need done in the script.\n1)  I need to open the application.\n2)  Open the \u201cOpen Network Stream\u2026\u201d tab (Can be done with Ctrl+N).\n3)  Type a string of characters \u201cString of characters\u201d\n4)  Push \u201cEnter\u201d twice on the keyboard.\nI\u2019ve checked various websites across the internet and could not find any information regarding this. I am sure it\u2019s possible but I am new to writing scripts and not too experienced. Are commands like the steps above possible to be completed in a script?\nNote: Using Linux based OS (Raspbian).\nThank you.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":20,"Q_Id":51791754,"Users Score":0,"Answer":"Do whichever changes you want manually once on an arbitrary system, then make a copy of the application's configuration files (in this case ~\/.config\/vlc)\nWhen you want to replicate the settings on a different machine, simply copy the settings to the same location.","Q_Score":0,"Tags":"python,shell,vlc","A_Id":51791818,"CreationDate":"2018-08-10T17:54:00.000","Title":"How do I write a script that configures an applications settings for me?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I used to install pyenv by homebrew to manage versions of python, but now, I want to use anaconda.But I don't know how to uninstall pyenv.Please tell me.","AnswerCount":3,"Available Count":2,"Score":0.1973753202,"is_accepted":false,"ViewCount":69156,"Q_Id":51797189,"Users Score":3,"Answer":"Try removing it using the following command:\nbrew remove pyenv","Q_Score":31,"Tags":"python,macos,homebrew,pyenv","A_Id":51797223,"CreationDate":"2018-08-11T06:44:00.000","Title":"how to uninstall pyenv(installed by homebrew) on Mac","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I used to install pyenv by homebrew to manage versions of python, but now, I want to use anaconda.But I don't know how to uninstall pyenv.Please tell me.","AnswerCount":3,"Available Count":2,"Score":0.1973753202,"is_accepted":false,"ViewCount":69156,"Q_Id":51797189,"Users Score":3,"Answer":"None work for me (under brew) under Mac Cataline.  \nThey have a warning about file missing under .pyenv. \n(After I removed the bash_profile lines and also rm -rf ~\/.pyenv,\nI just install Mac OS version of python under python.org and seems ok.\nSeems get my IDLE work and ...","Q_Score":31,"Tags":"python,macos,homebrew,pyenv","A_Id":58908094,"CreationDate":"2018-08-11T06:44:00.000","Title":"how to uninstall pyenv(installed by homebrew) on Mac","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm building a PyQt5 application on Ubuntu 18.04, however, when I run my script, audio doesn't work and the console has this error when I import PyQt5.QtMultimedia\ndefaultServiceProvider::requestService(): no service found for - \"org.qt-project.qt.mediaplayer\"\nI've seen other problems similar to this, but their solutions didn't seem to work for me. I'm using PyQt5 5.11.2 installed from pip in a venv.\nSolutions I tried:\n\nsudo apt-get install libqt5multimedia5-plugins\nsudo apt-get install python3-pyqt5 python3-pyqt5.qtmultimedia","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":880,"Q_Id":51812530,"Users Score":0,"Answer":"Try Running your python file globally as the pyqt5 module is installed in the global python not the virtual environment one.","Q_Score":0,"Tags":"python,ubuntu,pyqt","A_Id":70707298,"CreationDate":"2018-08-12T20:22:00.000","Title":"PyQt5: no service found for - \"org.qt-project.qt.mediaplayer\"","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I read the docs trying to get a basic understanding but it only shows that ProcessPoolExecutor allows to side-step the Global Interpreter Lock which I think is the way to lock a variable or function so that parallel processes do not update its value at the same time.\nWhat I am looking for is when to use ProcessPoolExecutor and when to use ThreadPoolExecutor and what should I keep in mind while using each approach!","AnswerCount":2,"Available Count":2,"Score":1.0,"is_accepted":false,"ViewCount":20470,"Q_Id":51828790,"Users Score":30,"Answer":"ProcessPool is for CPU bound tasks so you can benefit from multiple CPU.\nThreads is for io bound tasks so you can benefit from io wait.","Q_Score":46,"Tags":"python,python-3.x,multithreading,parallel-processing,python-3.5","A_Id":51829021,"CreationDate":"2018-08-13T18:50:00.000","Title":"What is the difference between ProcessPoolExecutor and ThreadPoolExecutor?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I read the docs trying to get a basic understanding but it only shows that ProcessPoolExecutor allows to side-step the Global Interpreter Lock which I think is the way to lock a variable or function so that parallel processes do not update its value at the same time.\nWhat I am looking for is when to use ProcessPoolExecutor and when to use ThreadPoolExecutor and what should I keep in mind while using each approach!","AnswerCount":2,"Available Count":2,"Score":1.0,"is_accepted":false,"ViewCount":20470,"Q_Id":51828790,"Users Score":64,"Answer":"ProcessPoolExecutor runs each of your workers in its own separate child process.\nThreadPoolExecutor runs each of your workers in separate threads within the main process.\nThe Global Interpreter Lock (GIL) doesn't just lock a variable or function; it locks the entire interpreter. This means that every builtin operation, including things like listodicts[3]['spam'] = eggs, is automatically thread-safe.\nBut it also means that if your code is CPU-bound (that is, it spends its time doing calculations rather than, e.g., waiting on network responses), and not spending most of its time in an external library designed to release the GIL (like NumPy), only one thread can own the GIL at a time. So, if you've got 4 threads, even if you have 4 or even 16 cores, most of the time, 3 of them will be sitting around waiting for the GIL. So, instead of getting 4x faster, your code gets a bit slower.\nAgain, for I\/O-bound code (e.g., waiting on a bunch of servers to respond to a bunch of HTTP requests you made), threads are just fine; it's only for CPU-bound code that this is an issue.\nEach separate child process has its own separate GIL, so this problem goes away\u2014even if your code is CPU-bound, using 4 child processes can still make it run almost 4x as fast.\nBut child processes don't share any variables. Normally, this is a good thing\u2014you pass (copies of) values in as the arguments to your function, and return (copies of) values back, and the process isolation guarantees that you're doing this safely. But occasionally (usually for performance reasons, but also sometimes because you're passing around objects that can't be copied via pickle), this is not acceptable, so you either need to use threads, or use the more complicated explicit shared data wrappers in the multiprocessing module.","Q_Score":46,"Tags":"python,python-3.x,multithreading,parallel-processing,python-3.5","A_Id":51829082,"CreationDate":"2018-08-13T18:50:00.000","Title":"What is the difference between ProcessPoolExecutor and ThreadPoolExecutor?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to use Crontab to schedule a shell script that runs the main python script. I had tried putting shebang #!\/usr\/local\/bin\/python in the first line of python script but it errorred out with \"cannot importing certain packages\". However, if I call the python script in the shell script by \/usr\/local\/bin\/python  python_script.py, it worked. Any ideas why I can't use the shebang #!\/usr\/local\/bin\/python directly in python instead of the way calling in the shell as mentioned above (it's not elegant)?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":269,"Q_Id":51833010,"Users Score":0,"Answer":"This is very likely an issue with your environment variables. Most likely you've got different entries in your PATH or PYTHONPATH variables.\nTo see the difference, you could have your script be a bash script and have it echo the output of env and compare it to your shell's env.","Q_Score":0,"Tags":"python,shell,shebang","A_Id":62348071,"CreationDate":"2018-08-14T02:44:00.000","Title":"Python Shebang Doesn't Work #!\/usr\/local\/bin\/python","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a simple Python code for a machine learning project. I have a relatively big database of spontaneous speech. I started to train my speech model. Since it's a huge database I let it work overnight. In the morning I woke up and saw a mysterious\nKilled: 9\nline in my Terminal. Nothing else. There is no other error message or something to work with. The code run well for about 6 hours which is 75% of the whole process so I really don't understand whats went wrong.\nWhat is Killed:9 and how to fix it? It's very frustrating to lose hours of computing time...\nI'm on macOS Mojave beta if it's matter. Thank you in advance!","AnswerCount":2,"Available Count":1,"Score":-0.0996679946,"is_accepted":false,"ViewCount":16683,"Q_Id":51833310,"Users Score":-1,"Answer":"Try to change the node version.\nIn my case, that helps.","Q_Score":12,"Tags":"python,macos,machine-learning,terminal","A_Id":72140478,"CreationDate":"2018-08-14T03:28:00.000","Title":"What is Killed:9 and how to fix in macOS Terminal?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Lets say I have a Queue listening to Kafka containing realtime messages.\nI also have a \"worker\" that get the message from the Queue and performs updates on Elasticsearch. When I scale my project by adding more \"worker\" instances, how can I maintain the order of the messages?\nHow can I avoid one \"worker\" instance get the later message from the queue but finish update to Elasticsearch earlier?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":50,"Q_Id":51837861,"Users Score":0,"Answer":"This is the choice you have to make between parallel processing and sequencing.\nyou must have single partition for the topic to maintain the order of data. So you can have a max of 1 task in worker , additional task will be unassigned.","Q_Score":0,"Tags":"python,multithreading,elasticsearch,design-patterns,apache-kafka","A_Id":51914921,"CreationDate":"2018-08-14T09:15:00.000","Title":"How to guarantee message order when multiple instances update elasticsearch?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I would like to change in Python the icon of another running process (NOT the icon of an exe made from python with the likes of cx_freeze) in Windows. Is this possible?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":115,"Q_Id":51845504,"Users Score":4,"Answer":"It is not possible to modify another running process in that way with Python.","Q_Score":2,"Tags":"python,pywinauto","A_Id":51845625,"CreationDate":"2018-08-14T15:59:00.000","Title":"Change icon of another running process with Python","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"When launching Visual Studio Code from the Anaconda Navigator page, the python command works correctly in the integrated terminal (Powershell or Bash).\nHowever, when Visual Studio Code is launched normally (from start menu), python.exe is not found in the terminal (not in path). \nIs there a way to always apply Anaconda's config to VS Code, to avoid having to launch it from the Anaconda Navigator page?","AnswerCount":1,"Available Count":1,"Score":0.3799489623,"is_accepted":false,"ViewCount":715,"Q_Id":51846390,"Users Score":2,"Answer":"When you installed Anaconda you probably had it leave the copy of Python in your base environment off of PATH. That means when you open your terminal it won't be found normally (this isn't specific to VS Code). One way to deal with this is to create conda environments for your project as those will get activated in the terminal when you use the Python: Create Terminal command. That will then make python available as a command from your terminal.","Q_Score":1,"Tags":"python,visual-studio-code,anaconda,vscode-settings","A_Id":51849474,"CreationDate":"2018-08-14T16:56:00.000","Title":"VS Code: python.exe works in terminal only when opened from Anaconda Navigator","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"[Python - Beam SDK]\nI would like to be able to test timing issues in integration tests, so I want to build a generator system that pipes in messages into my Beam application with timestamps I specify. My current idea is to an application write to ports (one for each stream I want to listen to), and then have the Beam application listen to these ports (the same way it would listen to a Kafka topic). \nDoes Beam already have the ability to listen to a port as a source? And if not, what would be the best way to make this?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":123,"Q_Id":51850595,"Users Score":0,"Answer":"My experience with the [Java SDK]\nIn the way i see it a SocketIIO.read() implementation should just emit String (or byte[]) back. So creating a PTransform that open the port and then on the expand() method create a loop to just read the String (or byte[]) and then emit the values into the pipeline (returning a PColletion).\nHope it gives you an idea.","Q_Score":0,"Tags":"python,apache-beam,apache-beam-io","A_Id":51858983,"CreationDate":"2018-08-14T22:31:00.000","Title":"Apache Beam Input from Ports","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I need to run a Flask application as a Windows service. I managed to convert it to a Windows service using win32serviceutil. The problem I have is that it only works when I manually run PythonService.exe (with the -debug flag) from the \"activated\" environment (of course).\nIs there a way to activate the environment before attempting to run the service?\nI see some people used the Task Scheduler as a workaround but I'd prefer if Windows service manager could be used instead.","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":782,"Q_Id":51861488,"Users Score":1,"Answer":"I figured it out. The trick is to use pyinstaller to generate an EXE. This way all libraries will be included, and there will be no need to mess with the system environment variables.","Q_Score":2,"Tags":"python,windows,windows-services,anaconda","A_Id":51863823,"CreationDate":"2018-08-15T15:12:00.000","Title":"Windows service running in a Anaconda environment?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":1},{"Question":"I want to run Python script using \"Python launcher\" so that I can use shebang line to specify the Python environment for each individual script.\nI installed Python 3.6 from Anaconda.\nHowever, when I type \"py\" in conda prompt or windows CMD, it says 'py' is not recognized as an internal or external command.\nWhat should I do in order to use \"py\" command to launch Python script?","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":7324,"Q_Id":51861943,"Users Score":0,"Answer":"Unless you are using cygwin, windows has no shebang support. However, when you install Python, it should associate .py files with Python on the command line. Try running the script by just using the script name from your command line, or double-clicking the script in explorer. If this file-type association does not exist, you should also be able to run your script using conda script.py.","Q_Score":1,"Tags":"python,launcher,shebang","A_Id":51862049,"CreationDate":"2018-08-15T15:39:00.000","Title":"How to install python launcher","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"On my chromebook,I have installed Anaconda however when I enter anaconda-navigator into crosh I get this error message: \"ImportError: libGL.so.1: cannot open shared object file: No such file or directory\". I'm not sure why this happens, please can someone help.","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":592,"Q_Id":51862441,"Users Score":1,"Answer":"It looks like Anaconda needs a critical GL library file, in which case the whole directory seems to be missing according to the error message. \nI believe it needs this library to render the page. I've seen the article this comes from and it asks you to allow the application to be installed in a directory called \"\/usr\/local\/conda3\". I'm wondering if recent updates in Chrome OS may have separated the shared GL directory from the installation in this case or if there have been fundamental changes in the package in which it's requesting the import.\nSince these changes can come along at any time and without warning, it might be best to create a crouton instance and install Ubuntu or some other crouton-compatible Linux distro on your Chromebook. Really this takes up quite a bit of space so I'd recommend having at least a 32GB SSD or EMMc drive on your system.","Q_Score":1,"Tags":"python-3.x,anaconda,chromebook","A_Id":52782158,"CreationDate":"2018-08-15T16:12:00.000","Title":"Can't open anaconda-navigator on chromebook","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm running python 3.4.2 under Windows 7. I have some modules that I do NOT want to put (at least yet) into the python subdirectories. After much angst, I've gotten them to run, but only at the expense of adding PYTHONHOME and PYTHONPATH to my System variables.  \nI tried creating a batch file, set these and then executed my script. I tried setx, but this just puts the variables in my User variables where python does not appear to recognize them.  \nI find it hard to believe that I can't distribute some of these scripts to my co-workers without forcing them to change their System variables. \nAm I doing something wrong?","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":78,"Q_Id":51865304,"Users Score":0,"Answer":"As has been pointed out elsewhere setting pythonpath and pythonhome were probably not the best of ideas, especially in my newbie case because they ended up interferring with gcloud. I ended up adjusting my scripts so they sys.path.append(\"ZXYLIB\") where XYXLIB is a path I set the the batch file calls the python, and that works.","Q_Score":0,"Tags":"python,batch-file","A_Id":51884756,"CreationDate":"2018-08-15T19:38:00.000","Title":"ImportError: No module name xxx - How not to permanently set System variables","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have Python 3.7 installed, and want to make an .exe out of it, so I'm trying to make a 3.6.5 file so pyinstaller will work on it. How can I make it so the version of python the file uses is 3.6.5 and not 3.7(my default). When I type python in cmd it goes in 3.7. When I type python --version, it says 3.7. Keep in mind, I typed all of this in the directory of where 3.6.5 is. 3.7 is installed on my C though, while 3.6.5 is installed in my programs\/local\/python directory. What should I do?","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":829,"Q_Id":51868433,"Users Score":0,"Answer":"You can run your desired Python executable directly from \/path\/to\/Python\/bin\/python.exe .","Q_Score":0,"Tags":"python,exe,python-3.6,pyinstaller,python-3.7","A_Id":51868492,"CreationDate":"2018-08-16T01:25:00.000","Title":"How to make a python file using a previous version?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to work with Kafka for data ingestion but being new to this, i am kind of pretty much confused.I have multiple  crawlers, who extract data for me from web platform. Now, the issue is i want to ingest that extract data to Hadoop using Kafka without any middle scripts\/service file . Is it possible ?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":1991,"Q_Id":51876515,"Users Score":2,"Answer":"without any middle scripts\/service file . Is it possible ?\n\nUnfortunately, no. \nYou need some service that's writing into Kafka (your scraper). Whether you produce into Kafka HTTP links (then write an intermediate consumer\/producer that generates the scraped results), or only produce the final scraped results, that's up to you. \nYou also need a second service consuming those topic(s) that writes to HDFS. This could be Kafka Connect (via Confluent's HDFS Connector library), or PySpark (code you'd have to write yourself), or other options that include \"middle scripts\/services\".\nIf you'd like to combine both options, I would suggest taking a look at Apache Nifi or Streamsets, which can perform HTTP lookups, (X)HTML parsing, and Kafka+HDFS connectors, all configured via a centralized GUI. Note: I believe any Python code would have to be rewritten in a JVM language to support major custom parsing logic in this pipeline","Q_Score":1,"Tags":"python,apache-kafka,web-crawler,kafka-producer-api","A_Id":51887428,"CreationDate":"2018-08-16T11:57:00.000","Title":"Data ingestion using kafka from crawlers","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"As I was fiddling some bash scripting on osx, I seemed to have done irreparable damage to my python installation.\nLong story short, I typed hash python in the terminal and now I can't use python.\nLets say I try:\npython code_to_run.py \nI get:\npython is hashed (\/path\/to\/my\/python)\nI've tried hash -r and hash -d python to no avail.\nAny suggestions?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":56,"Q_Id":51901570,"Users Score":0,"Answer":"In the manual for Bash:\n\nhash [-lr] [-p filename] [-dt] [name]\nEach time hash is invoked, the full pathname of the command name is determined by searching the directories in $PATH and remembered.\nAny previously-remembered pathname is\ndiscarded.  If the -p option is supplied, no path search is performed, and filename is used as the full file name of the command.\nThe -r option causes the shell to forget\nall remembered locations.  The -d option causes the shell to forget the remembered location of each name.  If the -t option is\nsupplied, the full pathname  to  which  each\nname corresponds is printed.  If multiple name arguments are supplied with -t, the name is printed before the hashed full pathname.\nThe -l option causes output to be dis-\nplayed in a format that may be reused as input.  If no arguments are given, or if only -l is supplied, information about remembered\ncommands is printed.  The return status\nis true unless a name is not found or an invalid option is supplied.\n\nhash -r worked for me (I guess if you have an important hash then this is not for you). First time I noticed this system.","Q_Score":1,"Tags":"python,bash,macos,hash","A_Id":71031247,"CreationDate":"2018-08-17T19:10:00.000","Title":"OSX -- python is hashed (\/urs\/local\/cellar\/python\/2.7\/etc)","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a RHEL server with Anaconda3 installed. Each user in the system gets 2 GiG space in the \/home\/ folder and another large folder in a mounted drive. When the user is trying to create a conda environment using conda create -n my_env it fills all the .tar files in .conda folder and installation breaks. Is there a way I specify a custom location for the .conda folder.\nBest\nJagan","AnswerCount":3,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":10916,"Q_Id":51957827,"Users Score":0,"Answer":"I had the same disk space problem.\nAll docs and forums told me to uninstall and reinstall anaconda to new location...\nI didn't want that, so here another approach:\n\ncopy anaconda folder to new location.\nlets assume old location \/home\/uname\/anaconda3,\nnew location \/home\/uname\/mountx\/anaconda3\ncp -r \/home\/uname\/anaconda3 \/home\/uname\/mountx\/anaconda3\nrename original anaconda folder (to be sure its not used later)\nmv \/home\/uname\/anaconda3 \/home\/uname\/anaconda3.bak\nreplace all occurrences of \"\/home\/uname\/anaconda3\" with \"\/home\/uname\/mountx\/anaconda3\".\ndo this in new anaconda folder, .conda, .bashrc, and your projects.\nI used PyCharm with no open project to do the replacing,\nsed in a shell might also work\nstart new anaconda shell and PyCharm to test it\nremove renamed original anaconda folder afterwards if it works\nrm -rf \/home\/uname\/anaconda3.bak\ndone\n\nworked fine like a PyCharm for me :)","Q_Score":9,"Tags":"python,anaconda,conda","A_Id":71395472,"CreationDate":"2018-08-21T23:05:00.000","Title":"anaconda .conda folder move from \/home\/usrxy to some other location","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a Python app that I use locally that needs to be launched via pipenv run python3 appname.py in order to load virtual environment with installed dependencies. This is all on macOS.\nWhat I want to achieve is to be able to run this app from anywhere with $ appname [args].\nSo what I did was:\n\nadd #!\/usr\/bin\/env pipenv run python3 to appname.py;\nmake that file executable with chmod +x appname.py;\nmake symlink with ln -s \/path\/to\/appname.py ~\/.bin\/appname;\nput ~\/.bin on my $PATH.\n\nNow when I launch $ appname, pipenv creates a new virtual environment in the ~\/.bin folder and complains about missing dependencies, all instead of following through into the actual location of the script.\nIs there a way to overcome this? Or maybe a better way to achieve what I want?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":486,"Q_Id":51970877,"Users Score":0,"Answer":"For my purposes a more sensible thing to do was freezing my code by packaging it (along with all dependencies) into an executable with pyinstaller.\nWhat I did was:\n\nInstalled pyinstaller as dev dependency with pipenv install --dev pyinstaller;\nLaunched pipenv shell in the project directory;\nPackaged the app with pyinstaller --onefile appname.py;\nMoved the resulting self-containing [project path]\/dist\/appname executable into my ~\/.bin directory.\n\nThere were some unrelated issues to overcome, but otherwise worked perfectly for me.","Q_Score":1,"Tags":"python,symlink,shebang,pipenv","A_Id":51986874,"CreationDate":"2018-08-22T16:02:00.000","Title":"Running pipenv environment via $PATH symlink to executable .py file","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Is it possible to create a hardlink\/symlink on networkshare that is on linux but from windows environemnt which has access to that share?\nLets say that I have a file on networkshare:\n\\share\\test.txt \nand I want to create hardlink (or symlink) here:\n\\share\\links\\test.txt \nBut I can only use python which is installed on windows machine with access to that share.\nThanks for any help.","AnswerCount":1,"Available Count":1,"Score":-0.1973753202,"is_accepted":false,"ViewCount":50,"Q_Id":51973372,"Users Score":-1,"Answer":"Not over cifs (windows share) protocol. From the windows machine viewpoint the symlinks don't even exist, they appear and behave as normal files, and windows has no way to create or even differentiate them when using this protocol.\nYou could use paramiko to automate a ssh session to the linux machine and create the symlinks using this method.","Q_Score":0,"Tags":"python,linux,windows,symlink,hardlink","A_Id":51973665,"CreationDate":"2018-08-22T18:50:00.000","Title":"Create hardlink\/symlink from windows on unix networkshare","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I currently have a python script that launches an iTerm window and runs logcat on an android device. When what I am doing in the script is complete, I want to also have the ability to stop the logcat. I was originally just killing iTerm to stop the log, but this will not work going forward...is there anyway to programatically stop the log? (this is typically done by pressing ctr+c)","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":721,"Q_Id":51988445,"Users Score":1,"Answer":"adb shell killall -2 logcat would gracefully stop all running logcat processes on the device.","Q_Score":0,"Tags":"python,scripting,adb,logcat","A_Id":51988613,"CreationDate":"2018-08-23T14:43:00.000","Title":"Script to stop logcat in terminal window","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am getting the below error when trying to pip install mysql:\n\nbuilding '_mysql' extension\n          creating build\/temp.macosx-10.6-intel-2.7\n          \/usr\/bin\/clang -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -Qunused-arguments -Qunused-arguments -Dversion_info=(1,2,5,'final',1) -D__version__=1.2.5 -I\/usr\/local\/Cellar\/mysql\/8.0.12\/include\/mysql -I\/Library\/Frameworks\/Python.framework\/Versions\/2.7\/include\/python2.7 -c _mysql.c -o build\/temp.macosx-10.6-intel-2.7\/_mysql.o\n          _mysql.c:44:10: fatal error: 'my_config.h' file not found\n          #include \"my_config.h\"\n                   ^~~~~~~~~~~~~\n          1 error generated.\n          error: command '\/usr\/bin\/clang' failed with exit status 1\n\nAny ideas?","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":378,"Q_Id":52002400,"Users Score":2,"Answer":"you don't have my_config file. It is because you have not installed mysql on your computer. Try to install after setup mysql","Q_Score":1,"Tags":"python,mysql,macos,pip","A_Id":52054252,"CreationDate":"2018-08-24T10:21:00.000","Title":"pip install mysql error","Data Science and Machine Learning":0,"Database and SQL":1,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm using docker python SDK docker-py, which is quite convenient. I look through the document, I still can't figure out how to create a daemon container with interface terminal,that is to say, if in the shell, this equals to the command docker run -dit image. \nI know docker-py right now offers the client.containers.run to run a contaniner, and with deatch argument I can run it as a daemon. However, I want start it with a interface terminal.\n'Cause my further code would access to the container from the remote server. Is there any way to create it directly with docker-py instead of using os.system(docker run -dit image)?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":241,"Q_Id":52013784,"Users Score":0,"Answer":"After swimming in the doc for a while, I figure it out.\nThe command docker run -dit image in docker-py is client.containers.run(image,tty=True,stdin_open=True, detach=True) This would work. Thank u David.","Q_Score":0,"Tags":"python,docker,dockerpy","A_Id":52017674,"CreationDate":"2018-08-25T03:28:00.000","Title":"How to create a daemon container with interface terminal using docker-py?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have two python files.\nI need to call the 2nd one from 1st.\nI'm aware of os.system() commands.\nBut it's been mentioned as the worst way to execute a python script. \nThe script I need to call doesn't contain any functions or classes. but just the flow.\nwhat is the better way to execute the script from another script.","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":462,"Q_Id":52028909,"Users Score":0,"Answer":"Put both files in the same directory.\nAdd an empty file called __init__.py in the directory.\nThen in the first file just include this: from file2 import myfunction\nYou can then call myfunction from file2 in file1.","Q_Score":0,"Tags":"python","A_Id":52028928,"CreationDate":"2018-08-26T17:57:00.000","Title":"How to execute a python file from another","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm just a beginner in python coding but I have an issue for which I didn't found solution.\nI just try to run a simple script (hello world from the tutorial) but when I right click and execute the program in the terminal I just have a reply of the terminal with \"c:\/........\/helloworld.py\" (the path of my folder to my script), and not the program in itself, which should print \"hello world\".\nSo if anyone know the mistake I made please tell me !\nThank you.","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":90,"Q_Id":52036055,"Users Score":1,"Answer":"You need especifi the program interpreted to run the script, for run python scripts write \n\npython helloworld.py","Q_Score":0,"Tags":"python,python-3.x,path","A_Id":52036196,"CreationDate":"2018-08-27T09:14:00.000","Title":"Issue with executing a python script","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"How can I redirect\/show the console output (including outputs I print inside the program) so it would appear inside a Dash app (On the screen the user sees)?","AnswerCount":3,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":6280,"Q_Id":52057540,"Users Score":0,"Answer":"One possible way to do this is supply it as input to Dash Core Component Text Area's value property. This should work if its a string.","Q_Score":5,"Tags":"python,plotly,plotly-dash","A_Id":52064336,"CreationDate":"2018-08-28T12:09:00.000","Title":"Redirecting Python's console output to Dash","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have been trying to install Pyinstaller on a Mac computer. I am having trouble getting the terminal to execute the setup.py file needed to install it. Whenever I type python setup.py install in the terminal, I receive this error:\npython: cant open file 'setup.py': [Errno 2] No such file or directory\nI have tried moving the pyinstaller folder to the same folder as my python application and changing the directory that the terminal is acting in using \"cd Downloads\" or other directories and nothing has worked.\nThanks in advance.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":421,"Q_Id":52063311,"Users Score":0,"Answer":"Using a more specific cd command such as \"cd Downloads\/pyinstaller\" instead of \"cd Downloads\" works.","Q_Score":0,"Tags":"python,macos,pyinstaller,python-3.7","A_Id":52065931,"CreationDate":"2018-08-28T17:20:00.000","Title":"Installing Pyinstaller on Mac OSX","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I use pip install to install various python packages on my Mac OS terminal. If I don't include \"--user\" at the end, I am consistently notified that there was an \"EnvironmentError: [Errno 13] Permission Denied\". However, if I include --user at the end, I am able to install packages. However, on other Apple computers I use the Terminal and Python for, I have no trouble installing packages and I do not need to add \"--user\" to the end.\nWhy the difference here? Why do I need to include --user to the end of my pip install commands for one Mac laptop but not for others?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":2720,"Q_Id":52066829,"Users Score":1,"Answer":"With a virtual environment activated, pip install spam tries to install into the virtual environment's site-packages. This will almost always be somewhere you have write permissions for.\npip install --user spam tries to install into the user-packages directory. This will always be somewhere under your home directory, so you should always have write permissions for it.\npip install spam tries to install files into the site-packages directory for your Python installation. This will usually not be in your home directory (typically it's somewhere in \/Library), so you may or may not have write permissions.\n\nApple's pre-installed Python does not give you write permissions to its site-packages.\n\n\nsudo pip install spam will let you ignore the permissions by installing as root, although with some Python installations it may cause other problems.\n\nHomebrew, Python.org, and Anaconda\/Miniconda do give you write permissions to their site-packages if you leave the defaults alone.\n\n\nObviously, leave the defaults alone if you know what you're doing.\n\nLess common ways of installing (Enthought, building from source, MacPorts, etc.), you should read the appropriate docs.\n\n\nSo, most likely, you're using a third-party Python and\/or an active virtual environment on the machines where pip install spam works, but you're using Apple's pre-installed Python on the ones where it doesn't.\nWhile you could fix that by using sudo, you probably don't want to, for a few reasons:\n\nOn recent versions of macOS, Apple's pre-installed Python, and the packages they pre-install with it, are badly out of date.\nThe pre-installed packages are set up to be maintained with the deprecated easy_install rather than pip, so getting them up to date can be a huge pain.\nIf you mess things up too badly, you can break some system scripts that the OS depends on.\nYour changes can be undone by a macOS system update.\n\nSo, a better solution is to install Homebrew\/Anaconda\/Python.org Python if you can, and also use virtual environments when you can and --user whenever possible when you can't. Any one of these three will solve your problem, but you really should do all of them.\nAnd then, if you accidentally try to install something to Apple's site-packages, you'll get a permissions error\u2014but that's a good thing; it means you didn't actually change anything, so you have nothing to undo.","Q_Score":2,"Tags":"python,terminal,pip,installation","A_Id":52067165,"CreationDate":"2018-08-28T22:07:00.000","Title":"Why is permission denied on pip install except for when \"--user\" is included at end of command?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am writing unit tests (using Python 3.7, Pytest 3.6 and tox 3.0) for a function that compiles a series of shell commands as a list of strings, and then executes them using the subprocess module. The shell commands do the following:\n\ncreates a filename from the function arguments.\ncd into a given directory.\nchecks for a file with a certain name and removes it if it exist.\ncreates a new file with the same name.\nexecutes a program and pipes the output into the new file.\n\nMy test right now is mocking the subprocess module, and then asserting that it was called with a list of strings that contains all the expected commands given some test arguments. \nIs there a way to test that the commands do what they are supposed to? Right now my test is only checking if the list of commands I feed to the subprocess module is the same as the one I have asserted it to be. This does not tell me whether the commands are the right ones for what I am trying to achieve. Rather it only serves as a test on whether I can write down the same string in two different source files.\nCan I simulate the side effects that I expect the shell commands to have?","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":1572,"Q_Id":52072544,"Users Score":1,"Answer":"Your question combines two interesting topics: a) Testing code generated from a code generator and b) testing shell code.\nFor testing code from a generator, you have in principle to do the following: i) test that the generator creates the code that is expected - which you have already done, ii) test that the code snippets \/ pieces which the generator glues together actually behave (independently and in combination) as it is intended (which in your case are the shell code pieces that in the end together will form a valid shell program) - this is the part about testing shell code that will be adressed below, and iii) test that the inputs that control the generator are correct.\nIt is comparable with a compiler: i) is the compiler code, ii) are assembly code snippets that the compiler combines to get the resulting assembly program, and iii) is the source code that is given to the compiler to get it compiled.  Once i), ii) and iii) are tested, there is only seldom the need to also test the assembly code (that is, on assembly code level).  In particular, the source code iii) is ideally tested by test frameworks in the same programming language.\nIn your case it is not so clear how part iii) looks and how it can be tested, though.\nRegarding the testing of shell code \/ shell code snippets: Shell code is dominated by interactions with other executables or the operating system.  The type of problems that lies in interactions in shell code goes in the direction of, am I calling the right executables in the right order with the arguments in the right order with properly formatted argument values, and are the outputs in the form I expect them to be etc. To test all this, you should not apply unit-testing, but integration testing instead.\nIn your case this means that the shell code snippets should be integration-tested on the different target operating systems (that is, not isolated from the operating system).  And, the various ways in which the generator puts these snippets together should also be integration tested to see if they together operate nicely on the operating system.\nHowever, there can be shell code that is suitable for unit-testing.  This is, for example, code performing computations within the shell, or string manipulations.  I would even consider shell code with calls to certain fundamental tools like basename as suitable for unit-testing (interpreting such tools as being part of the 'standard library' if you like).  In your case as you describe the generated shell code\n\ncreates a filename from the function arguments.\n\nThis sounds like one example of a good candidate for 'unit-testing' shell code: This filename creation functionality could be put into a shell function and then be tested in isolation.","Q_Score":1,"Tags":"python-3.x,shell,unit-testing,zsh","A_Id":55927559,"CreationDate":"2018-08-29T08:08:00.000","Title":"Unit testing of shell commands called in a python script","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"After updating my system via pacman (arch linux 4.18) most of the python scripts aren't working anymore (errors about missing modules, pipenv errors, vim plugins errors).\nHow can I revert python to 3.6?\nGoogle didn't offer any satisfying solutions on that issue","AnswerCount":3,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":25841,"Q_Id":52072588,"Users Score":0,"Answer":"Use conda search python to select the version of python you want to downgrade to then use something like conda install python=3.6.0 if you want to downgrade to 3.6.0","Q_Score":1,"Tags":"python,archlinux","A_Id":53091322,"CreationDate":"2018-08-29T08:11:00.000","Title":"How to downgrade python 3.7 to 3.6?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have installed gunicorn in my Ubuntu virtual machine using sudo apt-get install gunicorn. How can I find the installed location of gunicorn?","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":7746,"Q_Id":52076148,"Users Score":2,"Answer":"How you checked it is not available in location \/home\/jkcsadmin\/.local\/bin\/gunicorn ? Try \/home\/jkcsadmin\/.local\/bin\/gunicorn -h and see whether it shows the help.\nNormally it is located at your bin folder \/usr\/bin\/gunicorn. Try \/usr\/bin\/gunicorn -h","Q_Score":4,"Tags":"python-3.x,ubuntu,gunicorn","A_Id":52081955,"CreationDate":"2018-08-29T11:15:00.000","Title":"How to find gunicorn path in Ubuntu using terminal?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have been trying to scroll the output of a script run via Ipython in a separate window\/session created by tmux (off notebook, meaning that I am not using Ipython notebook as usual: I am just using Ipython). I see that, while the program is loading the output, I can\u2019t scroll the window to see what has been published before, and can just visualize the latest results produced. Honestly, this problem comes totally unexpected because I usually use a notebook and have never encountered a similar issue. Could you help me please? Thanks in advance","AnswerCount":2,"Available Count":1,"Score":-0.0996679946,"is_accepted":false,"ViewCount":1191,"Q_Id":52079637,"Users Score":-1,"Answer":"Use threads for data processing, visualization, and gui interaction that is how you can avoid freez.","Q_Score":2,"Tags":"python,scroll,ipython,freeze,tmux","A_Id":52079720,"CreationDate":"2018-08-29T14:15:00.000","Title":"Impossible to scroll Ipython (not notebook!) while producing output within tmux window","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"There is cluster ID property that can be retrieved with Get-Cluster | select Id in powershell command. \nHow to get it with WMI? Looks like MSCluster_Cluster doesn't have ID field.","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":278,"Q_Id":52080462,"Users Score":0,"Answer":"Able to find cluster id on my own. Just in case if anyone looking for same.\nFound the cluster id in registry.\nHKEY_LOCAL_MACHINE\\Cluster\nKey: ClusterInstanceId","Q_Score":0,"Tags":"python,wmi,windows-server-2008-r2,failovercluster","A_Id":52121704,"CreationDate":"2018-08-29T14:52:00.000","Title":"How to get cluster id using WMI on Windows Server 2008 R2?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Is there a way within Python, perhaps using sys and os, to determine the size of the window in which you are running Python.  I can do this in emacs using keyboard to run an emacs function, but not in general.\nI did not work too hard at it, but the other answers (for me) failed in Windows using Anaconda3 Python.  Perhaps someone else could try them in an emacs environment, which is where I tried them. They do return answers that appear to be defaults because they do not match my window size.","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":116,"Q_Id":52080551,"Users Score":0,"Answer":"If you are running Python in a graphics window, at least on Windows, there is, in general, no way to get the window size from within the Python program.  If, for example, one starts IDLE from a Windows console, shutil.get_window_size() reports the size of the parent console (rows and columns), not the size of the tk text widget that IDLE's shell is running in.  If one starts IDLE otherwise, from an icon or File Explorer, one gets the default 24 x 80.","Q_Score":0,"Tags":"python,emacs","A_Id":52082578,"CreationDate":"2018-08-29T14:56:00.000","Title":"Determing Window Size from within Python is not answered by reference to Linux","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"am new into jenkins. am trying to do a jenkins job that uploads a file into a python container and then reload the container. could you guys please help me","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":33,"Q_Id":52096438,"Users Score":0,"Answer":"When you are creating your project you can add the command to upload and reload the python container under build->execute shell script.","Q_Score":0,"Tags":"python,docker,jenkins,devops","A_Id":52115297,"CreationDate":"2018-08-30T11:54:00.000","Title":"jenkins jobs that uploads a file into a python container","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I wonder if 'cd' directly to virtual environment is the same thing as sourcing the virtual environment. That is,\n\nsource <venv_name>\/bin\/activate\ncd <venv_name>\/bin\/\n\nIs (1) the same as (2)? I.e., is everything visible (1) also visible in (2)?","AnswerCount":2,"Available Count":2,"Score":0.0996679946,"is_accepted":false,"ViewCount":442,"Q_Id":52105030,"Users Score":1,"Answer":"Is (1) the same as (2)? I.e., is everything visible (1) also visible in (2)?\n\nNo. Those two commands do completely different things. \nA virtual environment isn't a \"thing\" that you can \"go in\". When you source the virtual environment activation script, almost the only thing it does is set some environment variables. \nIf you don't want to run the activation script, you can manually set these variables.  You can't do it with a cd command, however.","Q_Score":1,"Tags":"linux,python-3.x,virtualenv","A_Id":52107377,"CreationDate":"2018-08-30T20:38:00.000","Title":"Cd to virtual environment instead of sourcing it","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I wonder if 'cd' directly to virtual environment is the same thing as sourcing the virtual environment. That is,\n\nsource <venv_name>\/bin\/activate\ncd <venv_name>\/bin\/\n\nIs (1) the same as (2)? I.e., is everything visible (1) also visible in (2)?","AnswerCount":2,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":442,"Q_Id":52105030,"Users Score":2,"Answer":"It's not the same thing. \n\nsource <venv_name>\/bin\/activate\n\nThis changes where the site-packages are resolved. It achieves this by one very simple hack: prepending the venv's bin dir on an environment variable ($PATH), which influences where the python command resolves.\n\ncd <venv_name>\/bin\/\n\nChanging dir into <venv_name>\/bin will not make the packages installed in the venv (which are located in ..\/lib) available for import. The command python will still resolve to \/usr\/local\/bin\/python (or wherever your system python interpreter is) and the interpreter will still be using the system site-packages. You won't see the venv's library.\nCheck the output of python -m site within and outside of your virtualenv to see the difference.","Q_Score":1,"Tags":"linux,python-3.x,virtualenv","A_Id":52105037,"CreationDate":"2018-08-30T20:38:00.000","Title":"Cd to virtual environment instead of sourcing it","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have written a code with django and celery, it is for a machine to run some tasks and to be accessible through net. So I need the django and celery to run automatically when the built-in PC starts. Can anyone please tell me the best and easiest way to do this? Can servers like Apache handle such thing?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":158,"Q_Id":52127601,"Users Score":0,"Answer":"Ok, if anyone has this problem, first I wrote a .sh file for each one and then call them in start up setting in ubuntu.","Q_Score":0,"Tags":"python,django,apache,celery","A_Id":52540500,"CreationDate":"2018-09-01T11:20:00.000","Title":"Celery + Django on startup","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"Im trying to switch between python versions 3.6.6 and 3.7.0 in windows. I tried py -3.6.6 and doesn't work. Looked for options in py -h, found none. I saw a couple of answers for switching between python versions 2.x and 3.x by adding #!python3 at the start of the file.\nI'm able to switch between these by moving path variables up and down but I want to know if there is a option to switch between versions in cmd like there is brew switch python version in IOS. \nThank you.","AnswerCount":4,"Available Count":2,"Score":0.049958375,"is_accepted":false,"ViewCount":13973,"Q_Id":52133551,"Users Score":1,"Answer":"The easiest way is simply type py -2 if you want to use python2, and py -3 if you want to use python3.","Q_Score":10,"Tags":"python,windows","A_Id":62397061,"CreationDate":"2018-09-02T02:35:00.000","Title":"How to switch between python version Windows","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Im trying to switch between python versions 3.6.6 and 3.7.0 in windows. I tried py -3.6.6 and doesn't work. Looked for options in py -h, found none. I saw a couple of answers for switching between python versions 2.x and 3.x by adding #!python3 at the start of the file.\nI'm able to switch between these by moving path variables up and down but I want to know if there is a option to switch between versions in cmd like there is brew switch python version in IOS. \nThank you.","AnswerCount":4,"Available Count":2,"Score":0.0996679946,"is_accepted":false,"ViewCount":13973,"Q_Id":52133551,"Users Score":2,"Answer":"Change the path in environment variable after downloading python 3.7.0 in windows where you can find in the properties of My Computer in Advanced System Settings","Q_Score":10,"Tags":"python,windows","A_Id":52133693,"CreationDate":"2018-09-02T02:35:00.000","Title":"How to switch between python version Windows","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"My situation is as follows:\nhave a couple of tar files called tar1.tar.gzip, tar2.tar.gzip etc.\neach one contains a different file but with the same name - fn.csv.\nif I untar one after the other to the same dir, I get the last one,\nIs there a way to make tar append the content rather than stepping over it?\nso far, I've added copy to unique file name after each untar and then concatenated all the files, is there a more direct way (python or bash)?","AnswerCount":2,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":256,"Q_Id":52152258,"Users Score":2,"Answer":"There is no option for tar to do that. To do better than your current solution, you would need to write your own untar that appends to the current files.","Q_Score":0,"Tags":"python,bash,unix,gzip,tar","A_Id":52152335,"CreationDate":"2018-09-03T15:04:00.000","Title":"untar multiple tar files with identical names to a concatenated\/appended file","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have been trying to configure the prerender.io middleware for my angularjs app hosted on google app engine with webapp2 framework, but none of the options for installing the middleware token seem applicable. \nCan anyone be kind enough to assist me? Thank you.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":55,"Q_Id":52158087,"Users Score":0,"Answer":"If Google doesn't allow you to modify the server to install one of the middleware options, are you using a CDN? A CDN might allow you to set up the Prerender.io middleware on their platform. Feel free to email us at support@prerender.io","Q_Score":0,"Tags":"angularjs,webapp2,google-app-engine-python,prerender","A_Id":52167749,"CreationDate":"2018-09-04T02:38:00.000","Title":"How do I configure prerender.io to work on webapp2 for my angularjs app?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I've looked at some other answers but none seem to be quite what I'm looking for.\nI've got a python bot I've written that I turned in to a docker container that's launched via\ndocker run -dit --restart unless-stopped -v \/home\/dockeradmin\/pythonApp\/:\/pythonApp--name python-bot-app  python-bot\nMy question though is that how to update my docker container when I change the code for my python project. Right now I usually will just rebuild the image, stop\/prune the container, and then start it again, however this seems to be extremely wasteful.\nIs there a simple or \"right\" way to do this?","AnswerCount":3,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":10231,"Q_Id":52172970,"Users Score":3,"Answer":"Rebuilding your image when your code changes is the canonical approach, and is not wasteful at all if done right.\nYour pythonApp code should be COPY'd into your image as the final step (rule of thumb: most frequently changed step in dockerfile should go last). This means rebuilding will be very fast as all other steps will be cached. If you only have a few kB of source code changes it will only result in a single new layer of a few kB. Stopping and starting containers is also very light weight.\nThere is nothing to worry about in following this approach.","Q_Score":9,"Tags":"python,docker","A_Id":52243157,"CreationDate":"2018-09-04T19:38:00.000","Title":"Updating a Docker container with new code","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm using Jenkins to run a Flask app automatically from a Git branch.\nThe build works well, and it starts the Flask app on my server, except that when you run flask run, the command line stays active as long as the flask app runs.\nThus, the build never ends, and it ends up as an unstable build.\nHow can I get the flask app to run and get a Jenkins build success if it got the the * Running on http:\/\/0.0.0.0:5000\/ (Press CTRL+C to quit) message?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":852,"Q_Id":52207146,"Users Score":4,"Answer":"If you're running flask run in a bash script, adding & to the end (flask run &) will run the task in the background, allowing the bash script to continue. I think this will let your job finish and Jenkins can scan stdout for the message indicating success.\nEdit: Apparently overriding the build number export BUILD_ID=<whatever> is enough to stop Jenkins from killing the background process. I'd be wary of what you choose as <whatever>, if you choose an existing BUILD_ID, there could be side-effects.","Q_Score":2,"Tags":"python,jenkins,flask","A_Id":52207227,"CreationDate":"2018-09-06T15:07:00.000","Title":"Execute a flask run in Jenkins shell without timeout","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I have to launch a Python process from a C++ executable using the CreateProcess Windwos AP I.\nWhen I independently run the Python process, the relative paths for importing the libraries work well\nbut when I run the same Python process from a C++ executable, the relative paths for importing the libraries do not work because they will be taking the path relative to the directory in which the C++ executable is kept and not in the directory where the Python file is.\nSo is there a way to set up the environment of a Python process when launching it through the CreateProcess Windows API","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":47,"Q_Id":52209760,"Users Score":0,"Answer":"This issue has been resolved in the comments by Michael. Reproducing the comment below\nSet the lpCurrentDirectory parameter accordingly. It will be used to resolve relative paths (if a program doesn't set the current working directory explicitly later) \u2013","Q_Score":0,"Tags":"python,windows","A_Id":52241446,"CreationDate":"2018-09-06T17:55:00.000","Title":"How to set up the environment of a Python child process in Windows","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Trying to create a batch script for windows that runs a program with python3 if available else python2.\nI know the script can be executed with $py -2 script.py\nand py3 with $py -3 script.py.\nand if I run py -0, it returns all the python versions.\nHow do I build this script?\nI do not want to check if the python directory is available or not, I'd prefer to check in a way that is python location agnostic.","AnswerCount":3,"Available Count":1,"Score":1.0,"is_accepted":false,"ViewCount":3638,"Q_Id":52211917,"Users Score":7,"Answer":"Not a full solution, but a method to detect which version of Python is installed:\nYou can check if Python 3 is installed by running py -3 --version and then checking the %ERRORLEVEL% variable in the batch script.  If it is 0, then py -3 --version was successful, i.e. Python 3 is installed on the system.  If it is nonzero, then Python 3 is not installed.","Q_Score":3,"Tags":"python,batch-file","A_Id":52211993,"CreationDate":"2018-09-06T20:44:00.000","Title":"Batch Script to Execute script with python 3 if available else python 2","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"We have a server application based on Python 3.6 running on Google Kubernetes Engine. I added Google StackDriver Debug to aid in debugging some production issues but I cannot get our app to show up in the Stackdriver debug console. The 'application to debug' dropdown menu stays empty.\nThe kubernetes cluster is provisioned with the cloud-debug scope and the app starts up correctly. Also, the Stackdriver Debugging API is enabled on our project. When running the app locally on my machine, cloud debugging works as expected, but I cannot find a reason why it won't work on our production environment","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":207,"Q_Id":52222605,"Users Score":1,"Answer":"In my case the problem was not with the scopes of the platform, but rather with the fact that you cannot simply pip install google-python-cloud-debugger on the official python-alpine docker images. Alpine Linux support is not tested regularly and my problem was related to missing symbols in the C-library. \nAlpine Linux uses the MUSL C-library and it needs a google cloud debugger specifically built for that library. After preparing a specific docker image for this, I got it to work with the provided credentials.","Q_Score":1,"Tags":"python-3.x,google-kubernetes-engine,stackdriver,google-cloud-stackdriver","A_Id":52337909,"CreationDate":"2018-09-07T12:29:00.000","Title":"Google stackdriver debug not working in Kubernetes","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I want advice on how to do the following:\nOn the same server, I want to have two apps. One WordPress app and one Python app. At the same time, I want the root of my domain to be a static landing page.\nUrl structure I want to achieve:\n\nexample.com\/   => static landing page\nexample.com\/tickets => wordpress\nexample.com\/pythonapp => python app\n\nI have never done something like this before and searching for solutions didn't help.\nIs it even possible? \nIs it better to use subdomains?\nIs it better to use different servers?\nHow should I approach this?\nThanks in advance!","AnswerCount":2,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":112,"Q_Id":52257055,"Users Score":1,"Answer":"It depends on the webserver you want to use. Let's go with apache as it is one of the most used web servers on the internet.\n\nYou install your wordpress installation into the \/tickets subdirectory and install word-press as you normally would. This should install wordpress into the subdirectory.\nConfigure your Python-WSGI App with this configuration:\n\nWSGIScriptAlias \/pythonapp \/var\/www\/path\/to\/my\/wsgi.py","Q_Score":0,"Tags":"python,wordpress,url,routes,url-routing","A_Id":52257207,"CreationDate":"2018-09-10T11:43:00.000","Title":"one server, same domain, different apps (example.com\/ & example.com\/tickets )?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I'm writing a C++ program, which 'll run Python 3 interpreter as a child process, then connect two Linux anonymous pipes - one to it's stdout and stderr and the second to interpreter's stdin ; next communicate with it via these channels.\nI need to run Python in interactive mode, i.e. pass one command to it using input pipe and wait for the answer on the output pipe. Everything 'd be fine, but it seems Python can run interactive mode only if it's stdout and stdin connected to tty's. \nPython docs quotation:\n\nThe interpreter operates somewhat like the Unix shell: when called with standard input connected to a tty device, it reads and executes commands interactively; when called with a file name argument or with a file as standard input, it reads and executes a script from that file.\n\nIndeed when I'm running interpreter with pipes instead of tty, I can't see anything in response pipe, after the command was sent.\nSo - can I workaround such behaviour by some way and make python3 interpreter works exactly the way it was started from terminal by user?\nAgain, the problem in a nutshell: \nI need to integrate Python to my C++ server app, to allow clients execute python commands. \nEmbedding interpreter into server looks like a bad idea, mainly for reasons of safety ( users can damage server or it's data, besides server is running with some privileges I won't wanna grant to users  ).\nAnother possible solution is to use interpreter in CLI way ( command mode). The main problem is - then I need import some modules and pre-execute some code to provide my server environment and some API to users. It 'll be too heavy to do it before calling interpreter with every command ( these actions are  quite complex, including network connection establishing )\nSo, running interpreter in a separate process and server communicating with it using IPC mechanisms seems not so bad idea. \nAnyway, I'll be glad to take a look at your suggestions If you have any.","AnswerCount":3,"Available Count":1,"Score":0.1325487884,"is_accepted":false,"ViewCount":788,"Q_Id":52259978,"Users Score":2,"Answer":"You may use python in cli way, each time run the command user has entered, or archive them in a file and run per line entered. By this way, you can use it's output more simply. Hope to be useful.","Q_Score":0,"Tags":"python,linux,pipe,ipc","A_Id":52260420,"CreationDate":"2018-09-10T14:25:00.000","Title":"Python process input\/output using pipes","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"So there are variants of this question - but none quite hit the nail on the head.\nI want to run spyder and do interactive analysis on a server. I have two servers , neither have spyder. They both have python (linux server) but I dont have sudo rights to install packages I need.\nIn short the use case is: open spyder on local machine. Do something (need help here) to use the servers computation power , and then return results to local machine.\nUpdate:\nI have updated python with my packages on one server. Now to figure out the kernel name and link to spyder.\nLeaving previous version of question up, as that is still useful.\nThe docker process is a little intimidating as does paramiko. What are my options?","AnswerCount":2,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":32710,"Q_Id":52283535,"Users Score":1,"Answer":"I did a long search for something like this in my past job, when we wanted to quickly iterate on code which had to run across many workers in a cluster. All the commercial and open source task-queue projects that I found were based on running fixed code with arbitrary inputs, rather than running arbitrary code. \nI'd also be interested to see if there's something out there that I missed. But in my case, I ended up building my own solution (unfortunately not open source). \nMy solution was: \n1) I made a Redis queue where each task consisted of a zip file with a bash setup script (for pip installs, etc), a \"payload\" Python script to run, and a pickle file with input data.\n2) The \"payload\" Python script would read in the pickle file or other files contained in the zip file. It would output a file named output.zip.\n3) The task worker was a Python script (running on the remote machine, listening to the Redis queue) that would would unzip the file, run the bash setup script, then run the Python script. When the script exited, the worker would upload output.zip.\nThere were various optimizations, like the worker wouldn't run the same bash setup script twice in a row (it remembered the SHA1 hash of the most recent setup script). So, anyway, in the worst case you could do that. It was a week or two of work to setup.\nEdit: \nA second (much more manual) option, if you just need to run on one remote machine, is to use sshfs to mount the remote filesystem locally, so you can quickly edit the files in Spyder. Then keep an ssh window open to the remote machine, and run Python from the command line to test-run the scripts on that machine. (That's my standard setup for developing Raspberry Pi programs.)","Q_Score":20,"Tags":"python,docker,server,spyder,fabric","A_Id":52285027,"CreationDate":"2018-09-11T20:09:00.000","Title":"Run Spyder \/Python on remote server","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am using a Python3 container and when I check the info, it says it has Python 3.5 installed. However, when I try to use the python3 command in the SSH terminal, it doesn't recognize it as a command. Further, when I use the python command, it says it has Python 2.6.6 installed, leading me to believe that it doesn't have Python3, only Python 2.6.6. I am new to Python and Codeanywhere, so I am just be forgetting something, but I can't find anything about it online.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":152,"Q_Id":52283599,"Users Score":0,"Answer":"The Centos 7.2. Linux distributon (64 bit) has python 3.7","Q_Score":0,"Tags":"python,python-3.x,codeanywhere","A_Id":55534613,"CreationDate":"2018-09-11T20:14:00.000","Title":"Codeanywhere Python3 Container doesn't have Python3","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Windows 7 with Atom IDE. \nStick with me here, I'm new to using command line and atom.\nflake8 error while running python in atom. \nterminal say file location for flake8 is: \/c\/Users\/Parker\/AppData\/Local\/Programs\/Python\/Python37\/Scripts\/flake8\nHow do I get flake8 in my path for atom? I tried download the virtualenv and then abandoned that when I hit sudo:command not found. Figured there must be an easier way. \nHow do I do this? Been trying different methods for days and have exhausted the search function.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":4623,"Q_Id":52289061,"Users Score":0,"Answer":"I had this issue as well, and just doing pip install flake8 in cmd fixed it for me.","Q_Score":1,"Tags":"python,windows,atom-editor,flake8","A_Id":60538830,"CreationDate":"2018-09-12T06:50:00.000","Title":"How to get flake8 in $PATH","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am working on MacBook Pro 10.12.6. I downloaded the most recent Anaconda 5.2 distribution, with the Python 3.6 version.\nI can launch the Jupyter Notebook from the command line without any problem, but it does not work from the Anaconda Navigator. I have the Jupyter Notebook version 5.6.0 in the Navigator. How can I get it to work?","AnswerCount":9,"Available Count":6,"Score":0.0,"is_accepted":false,"ViewCount":41506,"Q_Id":52300930,"Users Score":0,"Answer":"When I installed Anaconda I faced a similar problem. Jupyter notebook was not launching from Anaconda. I google searched and tried every piece of advice but nothing worked until I figured out that Jupyter notebook runs on localhost and I already have XAMPP. I use xampp as localhost to test my web pages. I uninstalled the xampp completely. Restart the computer, run the Anaconda and launched jupyter notebook. Voila, now it's running.\nNow when I installed Docker, I faced a similar problem. then I did the same. Uninstalled Anaconda in order to run Docker. It'd be my pleasure if it solves anyone's problem.","Q_Score":9,"Tags":"python,macos,anaconda,jupyter-notebook,navigator","A_Id":66932463,"CreationDate":"2018-09-12T17:52:00.000","Title":"Jupyter notebook not launching from Anaconda Navigator","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am working on MacBook Pro 10.12.6. I downloaded the most recent Anaconda 5.2 distribution, with the Python 3.6 version.\nI can launch the Jupyter Notebook from the command line without any problem, but it does not work from the Anaconda Navigator. I have the Jupyter Notebook version 5.6.0 in the Navigator. How can I get it to work?","AnswerCount":9,"Available Count":6,"Score":0.022218565,"is_accepted":false,"ViewCount":41506,"Q_Id":52300930,"Users Score":1,"Answer":"I faced a similar issue running Anaconda on CentOS 7. \nThe root cause was Anaconda was running as root user.\nI created an OS user for installing Anaconda. Since that, I can start the Jupyter Notebook (Yes, I know this is a very basic best practice) :)","Q_Score":9,"Tags":"python,macos,anaconda,jupyter-notebook,navigator","A_Id":59678567,"CreationDate":"2018-09-12T17:52:00.000","Title":"Jupyter notebook not launching from Anaconda Navigator","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am working on MacBook Pro 10.12.6. I downloaded the most recent Anaconda 5.2 distribution, with the Python 3.6 version.\nI can launch the Jupyter Notebook from the command line without any problem, but it does not work from the Anaconda Navigator. I have the Jupyter Notebook version 5.6.0 in the Navigator. How can I get it to work?","AnswerCount":9,"Available Count":6,"Score":0.022218565,"is_accepted":false,"ViewCount":41506,"Q_Id":52300930,"Users Score":1,"Answer":"Launch it from cmd \/ terminal in cmd type jupyter notebook.","Q_Score":9,"Tags":"python,macos,anaconda,jupyter-notebook,navigator","A_Id":69204677,"CreationDate":"2018-09-12T17:52:00.000","Title":"Jupyter notebook not launching from Anaconda Navigator","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am working on MacBook Pro 10.12.6. I downloaded the most recent Anaconda 5.2 distribution, with the Python 3.6 version.\nI can launch the Jupyter Notebook from the command line without any problem, but it does not work from the Anaconda Navigator. I have the Jupyter Notebook version 5.6.0 in the Navigator. How can I get it to work?","AnswerCount":9,"Available Count":6,"Score":0.0,"is_accepted":false,"ViewCount":41506,"Q_Id":52300930,"Users Score":0,"Answer":"You just need to find the right version of anaconda I think. For me it works well when I downloaded a previous version, I was also facing the same issue. I could then launch jupyter from navigator itself.","Q_Score":9,"Tags":"python,macos,anaconda,jupyter-notebook,navigator","A_Id":68183376,"CreationDate":"2018-09-12T17:52:00.000","Title":"Jupyter notebook not launching from Anaconda Navigator","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am working on MacBook Pro 10.12.6. I downloaded the most recent Anaconda 5.2 distribution, with the Python 3.6 version.\nI can launch the Jupyter Notebook from the command line without any problem, but it does not work from the Anaconda Navigator. I have the Jupyter Notebook version 5.6.0 in the Navigator. How can I get it to work?","AnswerCount":9,"Available Count":6,"Score":0.0,"is_accepted":false,"ViewCount":41506,"Q_Id":52300930,"Users Score":0,"Answer":"Few things to try\n\nRun the Navigator in admin mode (Right click the shortcut -> More -> Run\nas Administrator)\nDowngrade Jupyterlab to another version and upgrade\nit again (basically reinstalling)\n\nThe first one solved my issue.","Q_Score":9,"Tags":"python,macos,anaconda,jupyter-notebook,navigator","A_Id":68916589,"CreationDate":"2018-09-12T17:52:00.000","Title":"Jupyter notebook not launching from Anaconda Navigator","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am working on MacBook Pro 10.12.6. I downloaded the most recent Anaconda 5.2 distribution, with the Python 3.6 version.\nI can launch the Jupyter Notebook from the command line without any problem, but it does not work from the Anaconda Navigator. I have the Jupyter Notebook version 5.6.0 in the Navigator. How can I get it to work?","AnswerCount":9,"Available Count":6,"Score":0.0,"is_accepted":false,"ViewCount":41506,"Q_Id":52300930,"Users Score":0,"Answer":"I had a custom path set as the base path for my jupyter notebook start-up folder. While taking some backup I had removed that folder. This was leading to Jupyter notebook and JupyterLab failing on start up.\nIt worked fine after I fixed that path.","Q_Score":9,"Tags":"python,macos,anaconda,jupyter-notebook,navigator","A_Id":67246477,"CreationDate":"2018-09-12T17:52:00.000","Title":"Jupyter notebook not launching from Anaconda Navigator","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have configured my robot project with Jenkins on the windows machine.Provided commands in execute windows batch commands = robot -d robot_result --variable profile:NR Tests\\Suite\\Module\nIn the module folder, I have all the robot test cases. hence, provided the path of test cases.\nBut when I trigger build in jenkins I get below error \n[ ERROR ] Parsing 'Tests\\Suite\\Module\\' failed: Data source does not exist.\nWhile same test cases are working file in Eclipse and command line with above-mentioned command. I am using python interpreter to execute test cases in windows machine.\nCan someone please provide input?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":1321,"Q_Id":52328413,"Users Score":0,"Answer":"This error means that you are doing something like \"robot foo.robot\", but \"foo.robot\" doesn't exist. Either you have a typo in the filename, or you're making assumptions about the cwd that aren't true, or the file literally doesn't exist.","Q_Score":0,"Tags":"python-3.x,jenkins,jenkins-pipeline,robotframework","A_Id":52332295,"CreationDate":"2018-09-14T08:57:00.000","Title":"Got \"failed: Data source does not exist\" when running robot test cases via Jenkins","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"From a Python script, I want to feed some small string data to a subprocess, but said subprocess non-negotiably accepts only a filename as an argument, which it will open and read. I non-negotiably do not want to write this data to disk - it should reside only in memory.\nMy first instinct was to use StringIO, but I realize that StringIO has no fileno(). mmap(-1, ...) also doesn't seem to create a file descriptor. With those off the table, I'm at a loss as to how to do this. Is this even achievable? The fd would be OS-level visible, but (I would expect) only to the process's children. \ntl;dr how to create private file descriptor to a python string\/memory that only a child process can see?\nP.S. This is all on Linux and doesn't have to be portable in any way.","AnswerCount":1,"Available Count":1,"Score":0.3799489623,"is_accepted":false,"ViewCount":876,"Q_Id":52340974,"Users Score":2,"Answer":"Reifying @user4815162342's comment as an answer:\nThe direct way to do this is:\n\npass \/dev\/stdin as the file argument to the process;\nuse stdin=subprocess.PIPE;\nfinally, Popen.communicate(<your input>) to feed the desired contents","Q_Score":3,"Tags":"python","A_Id":52350691,"CreationDate":"2018-09-15T01:56:00.000","Title":"Possible to get a file descriptor for Python's StringIO?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Is there a way to get Celery to allocate tasks to workers based on available RAM? I am developing a web app which applies memory hungry algorithms to large in-memory data, is there a way to make this more robust using Celery to respect available RAM?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":170,"Q_Id":52359174,"Users Score":0,"Answer":"Allocating tasks to workers based on available RAM is not possible. But, depending on your setup and exact requirements there are ways to work address this problem. Off the top of my head I can think of:\n\nyou run one worker (and nothing else) on a machine with loads of RAM\nand have this worker process these memory-hungry tasks only\nif you know how much memory you need for processing a task, you could\ncheck if that memory is available as a first step in your task\n(assuming that not much else runs on that box which could use up that\nmemory in between the check and the actual running of your\nmemory-hungry stuff) and if not, you can retry the task after a\ncertain time","Q_Score":0,"Tags":"python,python-3.x,celery,task-queue","A_Id":52362117,"CreationDate":"2018-09-16T23:18:00.000","Title":"Scheduling tasks with python\/celery\/any other task queue based on available RAM","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"Most of the standard libraries are written in Python .py files, but some are in .so files on Unix and .pyd on Windows. For example os is written in os.py while pyexpat is written in pyexpat.cpython-36m-darwin.so. What's so special about these .so libraries?","AnswerCount":1,"Available Count":1,"Score":0.761594156,"is_accepted":false,"ViewCount":3236,"Q_Id":52365723,"Users Score":5,"Answer":".so files are shared object files, which are compiled shared libraries. They are usually written in a compiled language like C, C++, Go etc. \nPython being an interpreted language, code written in it tends to be slow, because the interpreter needs to go through each line of the code being executed, translate it into some sort of intermediate byte code and then finally execute the byte code. This can be slow. \nIn cases where performance is a concern, modules are written in a lower level language like C which is then compiled to a shared object file. These files can be loaded by the Python interpreter and used like a normal python module. Because these modules are already compiled to machine code, they can be directly executed without going through the interpreter, and thus they are much faster than the equivalent code written in Python. \nWriting in a lower level language like C also allows for efficient usage of the memory and even release the global interpreter lock in order to exploit multicore parellilism. Scientific modules like numpy, scipy are examples of these.","Q_Score":2,"Tags":"python,standard-library,.so","A_Id":52365859,"CreationDate":"2018-09-17T10:31:00.000","Title":"Why are some Python standard libraries written in .so while most others are in .py?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"What are the differences between running Python code through an IDE and terminal? When I run my code in PyCharm it works, however when I try to run the same code in terminal I get NameError, etc.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":176,"Q_Id":52368509,"Users Score":0,"Answer":"An exact answer depends on the exact IDE and the exact terminal one compares on a particular OS.  The IDLE doc chapter, accessible from IDLE's Help menu, has a section '3.3. IDLE-console differences '.  Some of these apply to other IDEs.\nOne possible difference not discussed is language differences.  IDLE runs user code directly with python, as is.  Other IDEs add language extensions or command escapes.\nYour issue with NameErrors suggests that PyCharm inserts something into globals that standard python does not.  A few years ago, a couple of Stackoverflowers reported extra name issues with IDLE, which I fixed.  For anyone to say anything more, you would have to add specific code and the resulting traceback to your question.","Q_Score":0,"Tags":"terminal,python-idle","A_Id":52377559,"CreationDate":"2018-09-17T13:07:00.000","Title":"What are the differences between running Python through an IDE and terminal?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Everything else in python seems to work. When I start python from my terminal and type from scapy import all it completely locks up on me and takes a minute or two to kill. Anyone know why this could be?","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":113,"Q_Id":52370212,"Users Score":0,"Answer":"It's hard to tell exactly why, but here are a few possibilities:\n\nit might be working, but taking a while to import; you can check this by watching the CPU usage.\ngive it a few minutes and if it's still not working hit ctrl-c as Austin said; it should display an error trace which could tell you where the program is caught up.\nYour version of scapy might be out of date (the latest is 2.4.0). Try updating to the newest version","Q_Score":0,"Tags":"python-3.x,freeze,scapy","A_Id":52371119,"CreationDate":"2018-09-17T14:38:00.000","Title":"Terminal locking up trying to import scapy.all","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"We have successfully executed the source data collection python program using App Engine Cron service in App Engine Flexible environment. \nNow, We are trying to execute the same python program in App Engine Standard Environment. But, We are getting the Error Can't connect to HTTPS URL because the SSL module is not available. \nAnyone came across this Error ? I have given full access to App Engine default service account for the Bucket. Please help to resolve this issue.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":38,"Q_Id":52384913,"Users Score":0,"Answer":"Managed to resolve this error.\nWe need to add the below libraries in the app.yaml\nlibraries:\n - name: ssl\n   version: latest","Q_Score":0,"Tags":"google-app-engine,google-app-engine-python,app-engine-flexible","A_Id":52455730,"CreationDate":"2018-09-18T10:50:00.000","Title":"Python program working fine in App Engine Standard Environment. But we get SSL error when we schedule it in App Engine Flexible Environment","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I could see Perl script to send Splunk alert results to SNMP server. But i want to write python script which needs to send results to Snmp server.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":90,"Q_Id":52385476,"Users Score":0,"Answer":"You should connect to your splunk server also send your access,error logs with your splunk forwarder via python","Q_Score":0,"Tags":"python,snmp,splunk","A_Id":52498047,"CreationDate":"2018-09-18T11:22:00.000","Title":"Send splunk alert results to SNMP server using python script","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I want to call a webservice from a Databricks Notebook through Python. The needed library for this seems to be http.client.\nI have already found a code snippet to test this but when i try to execute it i get the following error:\n\nImportError: No module named http.client\n\nThis is correct cause i have no module installed yet.\nIn the next step i go to a folder within my Databricks, select Import -> Import Notebooks dialog click on (To import a library, such as a jar or egg, click here) -> Select in the Language DropDown Upload Python Egg or PyPI -> in pyPI name typehttp.client` and click on Install Library.\nThen i select Attach automatically to all clusters.\nI receive the following error:\n\nError: java.lang.RuntimeException: Installation failed with message:\n  Collecting http.client Collecting http.client Could not find a version\n  that satisfies the requirement http.client (from versions: ) No\n  matching distribution found for http.client You are using pip version\n  9.0.1, however version 18.0 is available. You should consider upgrading via the 'pip install --upgrade pip' command. Could not find\n  a version that satisfies the requirement http.client (from versions: )\n  No matching distribution found for http.client You are using pip\n  version 9.0.1, however version 18.0 is available. You should consider\n  upgrading via the 'pip install --upgrade pip' command.\n\nHow can i fix this?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":1210,"Q_Id":52388039,"Users Score":1,"Answer":"Can you import httplib, it must resolve the issue","Q_Score":1,"Tags":"python,azure,pip,pypi,databricks","A_Id":52388793,"CreationDate":"2018-09-18T13:45:00.000","Title":"Cannot install python packages thorugh PyPi in Azure Databricks","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I need to see the logs that generated from a python application. This python application runs in a miniconda environment.Is there a way I can check the logs ?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":385,"Q_Id":52391909,"Users Score":0,"Answer":"I don't know whether I understand the question correctly. In case your application is using logging object (ref. https:\/\/docs.python.org\/3\/library\/logging.html) then your output could either be in:\n\nConsole: from which the application was started\nFile: in case that you specified the logging output to a file\n\nIt depends on your configuration and on the logging level as well. Some applications (like Django) use their own configuration to log.","Q_Score":0,"Tags":"python,miniconda","A_Id":52392011,"CreationDate":"2018-09-18T17:35:00.000","Title":"How to view logs related to a python application runs as miniconda environment","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Hey I am really stuggling here with airflow on this. I have two other dags running no probllem however for some reasons these dags are failing and I'm not getting much back that makes sense to me in the logs. I can run this task with no issues as the airflow user through the command line but for some reason when I try doing it through the dag I get exit code 2. Has anyone some pointers on this? Thank you\n\n[2018-09-18 20:08:18,886] {base_task_runner.py:95} INFO - Subtask: airflow: error: unrecognized arguments: run pull_dcm_today_data pull_dcm_today_data 2018-09-18T19:00:00 --job_id 8 --raw -sd DAGS_FOLDER\/run_pull_dcm_today.py\n[2018-09-18 20:08:22,579] {jobs.py:2083} INFO - Task exited with return code 2","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":4139,"Q_Id":52396445,"Users Score":1,"Answer":"Try testing each one of the tasks in order using the airflow test command. If all the tasks run successfully but the DAG's keep failing you probably need to restart the whole project (webserver, scheduler and workers) because you might have outdated code somewhere.","Q_Score":1,"Tags":"python,airflow","A_Id":52397957,"CreationDate":"2018-09-19T00:49:00.000","Title":"when trying to run dag and Airflow returning status code2","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a long-running script at work (windows unfortunately) where I programmed it to print the current analysis results if I ctrl-c.  However, I was curious if after doing ctrl-c, I could start the script running again where it left off?\nThis is actually 3 questions:\n-is it possible to do this without any programming changes? - e.g. I accidentally hit ctrl-c and want to retroactively start it where it left off\n-can I use a command like ctrl-z (only on Mac I believe) on windows and program the script to print results when I issue it?\n-what is the best programmatic way of automatically finishing the execution of the line I am on (massive .txt file of data) when I use an interrupt command, store that line number (in a file maybe), and restart the program on the next line with the next execution?\nThanks! \n(FYI: I'm a novice Pythoner and my script currently takes about 10 min to perform 1 million lines.  Files I will use in the future will often have 100+ million lines)","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":43,"Q_Id":52408087,"Users Score":1,"Answer":"The short answer to your first question is No. Ctrl-C signals the interpreter, which unwinds the stack, presents you with a stack trace, and halts. You can't recover from ctrl-C for the same reason that you can't recover from any other untrapped exception. What you are asking for is a quick way to put Humpty Dumpty back together again. \nYou can restart a chess game from any point simply by laying out the pieces according to a picture you made before abandoning the game. But you can't easily do that with a program. The problem is that knowing the line number where the program stopped is not nearly enough information to recreate the state of the program at the time: the values of all the variables, the state of the stack, how much of the input it had read, and so forth. In other words, the picture is complicated, and laying out the pieces accurately is hard.\nIf your program is writing to the Windows console, you can suspend output by pressing ctrl-S and restart it by pressing ctrl-Q. These control characters are holdovers from the days of Teletype machines, but modern terminal emulators still obey them. This is a quick way to do what you want without program changes. Unsophisticated, but maybe good enough to begin with.\nAnd your program will probably run a lot faster if it writes its output to file, for later examination in a text editor, rather than writing directly to the Windows console.\nA full-on solution to your problem is something that I hesitate to recommend to a novice. The idea is to split calculation and display into two processes. The calculation process does its thing and feeds its results line by line to the display process. The display process listens to the calculation process and puts the results that it gets on the screen, but can also accept pause and resume commands. What happens while it is in the paused state is a design decision. You can decide either that the calculation process should block (easier option) or that it should buffer its results until the display process is ready to accept them again (harder option).","Q_Score":0,"Tags":"python,python-3.x","A_Id":52408920,"CreationDate":"2018-09-19T14:20:00.000","Title":"If I Keyboard Interupt a running Python script, is there a way to begin again where it left off? (windows)","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"If I am running Celery on (say) a bank of 50 machines all using a distributed RabbitMQ cluster.\nIf I have a task that is running and I know the task id, how in the world can Celery figure out which machine its running on to terminate it?\nThanks.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":85,"Q_Id":52415048,"Users Score":0,"Answer":"I am not sure if you can actually do it, when you spawn a task you will have a worker, somewhere in you 50 boxes, that executes that and you technically have no control on it as it s a separate process and the only thing you can control is either the asyncResult or the amqp message on the queue.","Q_Score":0,"Tags":"python,rabbitmq,celery","A_Id":52451214,"CreationDate":"2018-09-19T22:34:00.000","Title":"Celery - how to stop running task when using distributed RabbitMQ backend?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a command line program which I'd like to keep running until I open it again, so basically a program which first checks if there's currently any already running instance of itself and kill it.\nI tried os.system('TASKKILL \/F \/IM program.exe') but it turned out to be stupid because it also kills itself.","AnswerCount":4,"Available Count":1,"Score":0.049958375,"is_accepted":false,"ViewCount":1380,"Q_Id":52422865,"Users Score":1,"Answer":"The most reliable way to make sure there's only one instance of your application is to create a pid file in a known (fixed) location. This location will usually be in your application data folder or in the temporary directory. At startup, you should check if the pid file exists and if the pid contained there still exists and refers to your target process. If it exists, send a kill signal to it, then overwrite the file with your current pid before starting the rest of the application.\nFor extra safetiness, you may want to wait until the previous process have completely terminated. This can be done by either waiting\/polling to check if the process with that pid still exists, or by polling for the killed process to delete its own pid file. The latter may be necessary if process shutdown are very lengthy and you want to allow the current process to already start working while the old process is shutting down.","Q_Score":0,"Tags":"python,process,os.system,taskkill","A_Id":52423173,"CreationDate":"2018-09-20T10:22:00.000","Title":"How to make a program close it's currently running instance upon startup?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I deployed python app successfully but when I open the app it is showing me:\nApplication error\nAn error occurred in the application and your page could not be served. If you are the application owner, check your logs for details. You can do this from the Heroku CLI with the command\nHeroku logs --tail\nhere is my heroku logs:\n\nservice= status=503 bytes= protocol=https\n  2018-09-20T10:05:18.000000+00:00 app[api]: Build succeeded\n  2018-09-20T10:19:34.769300+00:00 heroku[router]: at=error code=H14\n  desc=\"No web processes running\" method=GET path=\"\/\"\n  host=demoaap.herokuapp.com request_id=1ae\n  01895-963b-4211-9b30-d16de606c827 fwd=\"182.72.121.210\" dyno= connect=\n  service= s tatus=503 bytes= protocol=https\n\n\"heroku ps\"commands gives:\nNo dynos on demoaap (demoaap is my app name)\nmoreover i have tried Herokuommand( \" heroku ps:scale web=1\" ) in order to run dynos but not working\n.\nPlease help me out","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":558,"Q_Id":52423143,"Users Score":0,"Answer":"web: gunicorn --worker-class eventlet -w 1 app:app","Q_Score":0,"Tags":"python,heroku,procfile","A_Id":53710702,"CreationDate":"2018-09-20T10:35:00.000","Title":"Python Heroku app has 0 web dynos despite right Procfile and at right location","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I deployed python app successfully but when I open the app it is showing me:\nApplication error\nAn error occurred in the application and your page could not be served. If you are the application owner, check your logs for details. You can do this from the Heroku CLI with the command\nHeroku logs --tail\nhere is my heroku logs:\n\nservice= status=503 bytes= protocol=https\n  2018-09-20T10:05:18.000000+00:00 app[api]: Build succeeded\n  2018-09-20T10:19:34.769300+00:00 heroku[router]: at=error code=H14\n  desc=\"No web processes running\" method=GET path=\"\/\"\n  host=demoaap.herokuapp.com request_id=1ae\n  01895-963b-4211-9b30-d16de606c827 fwd=\"182.72.121.210\" dyno= connect=\n  service= s tatus=503 bytes= protocol=https\n\n\"heroku ps\"commands gives:\nNo dynos on demoaap (demoaap is my app name)\nmoreover i have tried Herokuommand( \" heroku ps:scale web=1\" ) in order to run dynos but not working\n.\nPlease help me out","AnswerCount":2,"Available Count":2,"Score":0.0996679946,"is_accepted":false,"ViewCount":558,"Q_Id":52423143,"Users Score":1,"Answer":"If you used a Procfile in deployment, make sure it does not have an extension such as .txt.  If it does, you might try:\n\nDeleting that Procfile.txt.\nCreating a new Procfile without the extension.\nPushing the new files to Heroku.","Q_Score":0,"Tags":"python,heroku,procfile","A_Id":56436037,"CreationDate":"2018-09-20T10:35:00.000","Title":"Python Heroku app has 0 web dynos despite right Procfile and at right location","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"My system as Python 2.7 and 3.7 installed. I have attempted to install the EB CLI connected to Python 3 but the CLI tool seems only to connect to the 2.7 installation.\nAttempt 1\nWhen I run $ brew install awsebcli I get a version of EB that seems to be associated with 2.7, which is incorrect:\n$ eb --version\nEB CLI 3.14.4 (Python 2.7.1)\nAttempt 2\nWhen I attempt to install EB CLI using pip, the installation appears fine but I am unable to access EB. \n$eb --version\n-bash: eb: command not found\nThe docs suggest this might be to do with not having the path in the .bash_profile I've set up, however I have added the following to my .bash_profile and reloaded the .bash_profile:\n# Adding path to Elastic Beanstalk CLI\nexport Path=\/Library\/Python\/3.7\/bin:$PATH","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":1260,"Q_Id":52427511,"Users Score":0,"Answer":"I solved this by setting the PATH variable correctly - however the solution above is better (fitting with 12Factor App design)","Q_Score":1,"Tags":"python,amazon-web-services,amazon-elastic-beanstalk","A_Id":52428063,"CreationDate":"2018-09-20T14:29:00.000","Title":"EB CLI installing with Python 2 rather than Python 3","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am working on an event driven flow architecture and I'd like to have as many independent applications consuming from the same topic independently (not in the same consumer group). To do that I'd create one consumer group for each new application but I'd like to do that automatically through a system. Is that possible and is that the best approach?\nBy the way we are coding with Python.\nThanks.","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":223,"Q_Id":52460123,"Users Score":1,"Answer":"All you need to do is change the value of the group.id property while creating the consumer. You can do this either manually in each application or you can generate a random string using the UUID generator in Python","Q_Score":1,"Tags":"python,events,apache-kafka,kafka-consumer-api,consumer","A_Id":52484941,"CreationDate":"2018-09-22T19:25:00.000","Title":"How to add new Application consumers on the fly in Kafka","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a pretty simple setup. I'm running Pycharm 2018.2.3 and using docker compose to spin up 3 containers.\n\nMy Django application\nNGINX to serve static\nPostgres DB\n\nI've configured the remote interpreter for debugging the container, and break point work just fine in most cases, at least when I hit my API endpoints or some other action to the django application.\nWhat does not work, is when I run one of my manage custom manage.py custom commands. I've tried this 2 ways so far.\n\nI setup another debug configuration in PyCharm to execute the command. This results in another container spinning up (in place of the original. Running the command, without breaking on any line breaks. Then the whole container shuts down.\nI've logged into the container, run the manage.py command directly via the command line, and it execute in the container, but again no breakpoints.\n\nThe documentation seems to work in the normal case, but I can't find any help for debugging these commands in the container.\nThanks for any help or tips.","AnswerCount":3,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":1342,"Q_Id":52462866,"Users Score":1,"Answer":"Just an update in case anybody comes across a similar problem. My personal solution was to not use the manage.py commands, but instead make these same commands available via an http call.\nI found that it was easier (and often even more useful) to simply have an endpoint like myserver.com\/api\/do-admin-function and restrict that to administrative access.\nWhen I put a breakpoint in my code, even running in the container, it breaks just fine as expected and allows me to debug the way I'd like","Q_Score":5,"Tags":"python,django,docker,pycharm,remote-debugging","A_Id":54485770,"CreationDate":"2018-09-23T03:59:00.000","Title":"Pycharm debugging manage.py commands in docker compose","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I installed Python 3.7 for my Mac Book Pro and in Wing101 it still uses Python 2.7.. anyone who can help me out?","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":286,"Q_Id":52488445,"Users Score":0,"Answer":"In Wing 101, you can set the Python being used in the Configure Python dialog from the Edit menu, by setting the Python Executable.  Wing 101 version 6+ should really be finding and using the latest Python installation, although maybe it's installed in a place that it isn't found automatically.  Wing version 5 prefers Python 2 because it's fairly old and that made more sense at the time.","Q_Score":1,"Tags":"python,macos,wing-ide","A_Id":52489069,"CreationDate":"2018-09-24T23:02:00.000","Title":"Wing101 is defaulting to python 2.7 even though I have the latest version installed on my Mac","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Hello everyone i'm trying to set up virtualenv and virtualenvwrapper on MAC OS and made huge research  tried everything what i can. DOESN't Work.\nI had python 2.7, i installed python 3.7 using regular installer from the python website.\nInstalled everything what i need but getting error:\n\n\/usr\/bin\/python: No module named virtualenvwrapper\n  virtualenvwrapper.sh: There was a problem running the initialization\n  hooks.\nIf Python could not import the module virtualenvwrapper.hook_loader,\n  check that virtualenvwrapper has been installed for\n  VIRTUALENVWRAPPER_PYTHON=\/usr\/bin\/python and that PATH is set\n  properly.\n\nHere is my ~\/.bashrc :\n\nexport WORKON_HOME=$HOME\/.virtualenvs export PROJECT_HOME=$HOME\/code\n  export VIRTUALENVWRAPPER_PYTHON=\/usr\/local\/bin\/python export\n  VIRTUALENVWRAPPER_VIRTUALENV=\/usr\/local\/bin\/virtualenv export\n  VIRTUALENVWRAPPER_VIRTUALENV_ARGS='--no-site-packages'\nsource \/Library\/Frameworks\/Python.framework\/Versions\/3.7\/bin\/virtualenvwrapper.sh\n\nHere is where my python3 is installed \n\n\/Library\/Frameworks\/Python.framework\/Versions\/3.7\/bin\/python3\n\nSo in the end i did create one using \n\nvirtualenv -p python3 \"desired-path\"\n\nbut when i tried to set up everything with Django nothing is working bc of problem above. Any help please!!","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":727,"Q_Id":52491152,"Users Score":0,"Answer":"About 6 hours and i have a way to solve it so if anyone has the same problem just go ahead and change your ~\/.bashrc (by typing in Terminal nano ~\/.bashrc) to:\n\nexport WORKON_HOME=$HOME\/.virtualenvs export PROJECT_HOME=$HOME\/code\nexport\n  VIRTUALENVWRAPPER_PYTHON=\/Library\/Frameworks\/Python.framework\/Versions\/3.7\/bin\/python3.7\nexport VIRTUALENVWRAPPER_VIRTUALENV=\/Library\/Frameworks\/Python.framework\/Versions\/3.7\/bin\/virtualenv\nexport VIRTUALENVWRAPPER_VIRTUALENV_ARGS='--no-site-packages' source\n  \/Library\/Frameworks\/Python.framework\/Versions\/3.7\/bin\/virtualenvwrapper.sh","Q_Score":1,"Tags":"python-3.x,macos,virtualenv,virtualenvwrapper","A_Id":52498179,"CreationDate":"2018-09-25T05:28:00.000","Title":"Python virtualenv Can't set up! MAC OS","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":1},{"Question":"We have installed Centos 6.x in one or our VM and it has come with default Python 2.6 installed. On top of it we have installed Python 2.7 and configured Python 2.7 as default in \/usr\/bin\/. When I type python in my command line it gives version Python 2.7. But when I execute my python script file test.py it is using Python 2.6 instead of Python 2.7. Did I miss any configurations to tell my scripts to use Python 2.7 instead of Python 2.6 on my machine?","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":66,"Q_Id":52499341,"Users Score":1,"Answer":"Since it sounds like you set up your command line correctly, I would first try looking at your script. Did you try including the shebang at the top of your script? #!\/usr\/bin\/env python2.7","Q_Score":0,"Tags":"python,python-2.7,centos6","A_Id":52499590,"CreationDate":"2018-09-25T13:25:00.000","Title":"How to tell python script files to use particular version of python if there are multiple versions of python are installed on the machine","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Whenever I run python on Anaconda or atom, it automatically defaults to an environment I made called \"tf15\".\nWhen I do where python in my cmd I get the right path C:\\Users\\Kelfun\\Anaconda3\\python.exe\nBut when I run this in my jupyter notebook or atom text editor:\nimport sys\nprint(sys.executable)\nI get: C:\\Users\\Kelfun\\Anaconda3\\envs\\tf15\\python.exe\nHow can I make the \"root\" environment as my default environment in Anaconda.\nAlso, I did not activate \"tf15\" before opening jupyter or atom yet it defaults to it.\nAny help is appreciated, Thanks","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":926,"Q_Id":52507974,"Users Score":0,"Answer":"You have probably added C:\\Users\\Kelfun\\Anaconda3\\envs\\tf15\\Scripts to your system's PATH variable ahead of the base Anaconda3 path.  The kernel for your 'tf15' environment is not in the \\Scripts folder, so you are seeing the correct path when using where python.\nTo fix it, open the system variables interface (Start Menu > type variable > click \"Edit the system environment variables\")\nCheck the PATH variable for both the system and the user for anything that points to C:\\Users\\Kelfun\\Anaconda3\\envs\\tf15 and remove them.","Q_Score":0,"Tags":"python,anaconda,environment","A_Id":52508062,"CreationDate":"2018-09-25T23:39:00.000","Title":"How to change the default python version on anaconda?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am using \"django-pyodbc-azure\" 3rd party library for making connection and django1.11 and python version 3.5.2\n\n*** Error in `\/home\/ubuntu\/GET-Services_mssql\/env_mssql\/bin\/python': double free or corruption (!prev): 0x00007f7f08078a90 ***\n======= Backtrace: =========\n\/lib\/x86_64-linux-gnu\/libc.so.6(+0x777e5)[0x7f7f2a7a17e5]\n\/lib\/x86_64-linux-gnu\/libc.so.6(+0x8037a)[0x7f7f2a7aa37a]\n\/lib\/x86_64-linux-gnu\/libc.so.6(cfree+0x4c)[0x7f7f2a7ae53c]\n\/usr\/lib\/x86_64-linux-gnu\/libodbc.so.2(SQLDriverConnectW+0x9a0)[0x7f7f24055100]\n\/home\/ubuntu\/GET-Services_mssql\/env_mssql\/lib\/python3.5\/site-packages\/pyodbc.cpython-35m-x86_64-linux-gnu.so(_Z14Connection_NewP7_objectbblbS0_R6Object+0x2c3)[0x7f7f242a52a3]\n\/home\/ubuntu\/GET-Services_mssql\/env_mssql\/lib\/python3.5\/site-packages\/pyodbc.cpython-35m-x86_64-linux-gnu.so(+0x111de)[0x7f7f242a21de]\n\/home\/ubuntu\/GET-Services_mssql\/env_mssql\/bin\/python(PyCFunction_Call+0x77)[0x4e9ba7]\n\/home\/ubuntu\/GET-Services_mssql\/env_mssql\/bin\/python(PyEval_EvalFrameEx+0x59f5)[0x53c6d5]\n\/home\/ubuntu\/GET-Services_mssql\/env_mssql\/bin\/python(PyEval_EvalFrameEx+0x4b04)[0x53b7e4]\n\/home\/ubuntu\/GET-Services_mssql\/env_mssql\/bin\/python(PyEval_EvalFrameEx+0x4b04)[0x53b7e4]\n\/home\/ubuntu\/GET-Services_mssql\/env_mssql\/bin\/python(PyEval_EvalFrameEx+0x4b04)[0x53b7e4]\n\/home\/ubuntu\/GET-Services_mssql\/env_mssql\/bin\/python[0x540199]\n\/home\/ubuntu\/GET-Services_mssql\/env_mssql\/bin\/python(PyEval_EvalFrameEx+0x50b2)[0x53bd92]\n\/home\/ubuntu\/GET-Services_mssql\/env_mssql\/bin\/python(PyEval_EvalFrameEx+0x4b04)[0x53b7e4]\n\/home\/ubuntu\/GET-Services_mssql\/env_mssql\/bin\/python[0x5434af]\n\/home\/ubuntu\/GET-Services_mssql\/env_mssql\/bin\/python(PyCFunction_Call+0x4f)[0x4e9b7f]\n\/home\/ubuntu\/GET-Services_mssql\/env_mssql\/bin\/python(PyEval_EvalFrameEx+0x614)[0x5372f4]\n\/home\/ubuntu\/GET-Services_mssql\/env_mssql\/bin\/python(PyEval_EvalCodeEx+0x13b)[0x540f9b]\n\/home\/ubuntu\/GET-Services_mssql\/env_mssql\/bin\/python[0x4ebd23]\n\/home\/ubuntu\/GET-Services_mssql\/env_mssql\/bin\/python(PyObject_Call+0x47)[0x5c1797]\n\/home\/ubuntu\/GET-Services_mssql\/env_mssql\/bin\/python[0x4fb9ce]\n\/home\/ubuntu\/GET-Services_mssql\/env_mssql\/bin\/python(PyObject_Call+0x47)[0x5c1797]\n\/home\/ubuntu\/GET-Services_mssql\/env_mssql\/bin\/python(PyObject_CallFunctionObjArgs+0x128)[0x5c1988]\n\/home\/ubuntu\/GET-Services_mssql\/env_mssql\/bin\/python(PyEval_EvalFrameEx+0x20bc)[0x538d9c]\n\/home\/ubuntu\/GET-Services_mssql\/env_mssql\/bin\/python(PyEval_EvalFrameEx+0x4b04)[0x53b7e4]\n\/home\/ubuntu\/GET-Services_mssql\/env_mssql\/bin\/python(PyEval_EvalCodeEx+0x13b)[0x540f9b]\n\/home\/ubuntu\/GET-Services_mssql\/env_mssql\/bin\/python[0x4ebd98]\n\/home\/ubuntu\/GET-Services_mssql\/env_mssql\/bin\/python(PyObject_Call+0x47)[0x5c1797]\n\/home\/ubuntu\/GET-Services_mssql\/env_mssql\/bin\/python(PyObject_CallFunctionObjArgs+0x128)[0x5c1988]\n\/home\/ubuntu\/GET-Services_mssql\/env_mssql\/bin\/python(_PyObject_GenericGetAttrWithDict+0x1bd)[0x593b9d]\n\/home\/ubuntu\/GET-Services_mssql\/env_mssql\/bin\/python(PyEval_EvalFrameEx+0x44d)[0x53712d]\n\/home\/ubuntu\/GET-Services_mssql\/env_mssql\/bin\/python[0x540199]\n\/home\/ubuntu\/GET-Services_mssql\/env_mssql\/bin\/python(PyEval_EvalFrameEx+0x50b2)[0x53bd92]\n\/home\/ubuntu\/GET-Services_mssql\/env_mssql\/bin\/python[0x540199]\n\/home\/ubuntu\/GET-Services_mssql\/env_mssql\/bin\/python(PyEval_EvalFrameEx+0x50b2)[0x53bd92]\n\/home\/ubuntu\/GET-Services_mssql\/env_mssql\/bin\/python[0x4ed3f5]\n\/home\/ubuntu\/GET-Services_mssql\/env_mssql\/bin\/python[0x5b7994]\n\/home\/ubuntu\/GET-Services_mssql\/env_mssql\/bin\/python[0x5b7fbc]\n\/home\/ubuntu\/GET-Services_mssql\/env_mssql\/bin\/python[0x57f03c]\n\/home\/ubuntu\/GET-Services_mssql\/env_mssql\/bin\/python(PyObject_Call+0x47)[0x5c1797]\n\/home\/ubuntu\/GET-Services_mssql\/env_mssql\/bin\/python(PyEval_EvalFrameEx+0x4ec6)[0x53bba6]\n\/home\/ubuntu\/GET-Services_mssql\/env_mssql\/bin\/python(PyEval_EvalFrameEx+0x4b04)[0x53b7e4]\n\/home\/ubuntu\/GET-Services_mssql\/env_mssql\/bin\/python(PyEval_EvalCodeEx+0x13b)[0x540f9b]\n\/home\/ubuntu\/GET-Services_mssql\/env_mssql\/bin\/python[0x4ebd23]\n\/home\/ubuntu\/GET-Services_mssql\/env_mssql\/bin\/python(PyObject_Call+0x47)[0x5c1797]\n\/home\/ubuntu\/GET-Services_mssql\/env_mssql\/bin\/python[0x4fb9ce]\n\/home\/ubuntu\/GET-Services_mssql\/env_mssql\/bin\/python(PyObject_Call+0x47)[0x5c1797]\n\/home\/ubuntu\/GET-Services_mssql\/env_mssql\/bin\/python[0x584716]\n\/home\/ubuntu\/GET-Services_mssql\/env_mssql\/bin\/python[0x5761aa]\n\/home\/ubuntu\/GET-Services_mssql\/env_mssql\/bin\/python[0x54320c]\n\/home\/ubuntu\/GET-Services_mssql\/env_mssql\/bin\/python(PyEval_EvalFrameEx+0x4ce6)[0x53b9c6]\n\/home\/ubuntu\/GET-Services_mssql\/env_mssql\/bin\/python(PyEval_EvalCodeEx+0x13b)[0x540f9b]\n\/home\/ubuntu\/GET-Services_mssql\/env_mssql\/bin\/python[0x4ebe37]\n\/home\/ubuntu\/GET-Services_mssql\/env_mssql\/bin\/python(PyObject_Call+0x47)[0x5c1797]\n\/home\/ubuntu\/GET-Services_mssql\/env_mssql\/bin\/python(PyEval_EvalFrameEx+0x252b)[0x53920b]\n\/home\/ubuntu\/GET-Services_mssql\/env_mssql\/bin\/python[0x5406df]\n\/home\/ubuntu\/GET-Services_mssql\/env_mssql\/bin\/python(PyEval_EvalFrameEx+0x54f0)[0x53c1d0]\n\/home\/ubuntu\/GET-Services_mssql\/env_mssql\/bin\/python(PyEval_EvalCodeEx+0x13b)[0x540f9b]\n\/home\/ubuntu\/GET-Services_mssql\/env_mssql\/bin\/python[0x4ebe37]\n\/home\/ubuntu\/GET-Services_mssql\/env_mssql\/bin\/python(PyObject_Call+0x47)[0x5c1797]\n\/home\/ubuntu\/GET-Services_mssql\/env_mssql\/bin\/python(PyEval_EvalFrameEx+0x252b)[0x53920b]\n\/home\/ubuntu\/GET-Services_mssql\/env_mssql\/bin\/python(PyEval_EvalCodeEx+0x13b)[0x540f9b]\n\/home\/ubuntu\/GET-Services_mssql\/env_mssql\/bin\/python[0x4ebe37]","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":141,"Q_Id":52511704,"Users Score":0,"Answer":"My comment to the question apparently solved the problem:\n\nPython 3.5.2 and unixODBC 2.3.1 sounds like Ubuntu 16.04. Some packages in the Ubuntu repositories can be very old, e.g., unixODBC 2.3.1 is almost 7 years old now. Since it is unixODBC that is crashing (in SQLDriverConnectW) you might want to try upgrading it to the latest version (currently 2.3.7).","Q_Score":1,"Tags":"python,sql-server,django,ubuntu,pyodbc","A_Id":52669412,"CreationDate":"2018-09-26T06:56:00.000","Title":"Any Solution to SQLDriverConnect Error in Django Occurred Below using pyodbc","Data Science and Machine Learning":0,"Database and SQL":1,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"In xfce, specifically xubuntu 16.04, where are the theme engines found? I'm chasing a persistent error that gives warnings on each execution of a python program which imports pygtk. My desktop theme is probably a leftover from gtk 2, which may be the problem, but I've not been able to locate such engines in any of the gtk 3 themes installed by default, either.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":19,"Q_Id":52529810,"Users Score":0,"Answer":"I think I finally found it; it's in a stanza of the theme's \"gtkrc\" file in its gtk-2.0 directory. I've edited that line to replace the engine name shown by the warning message, with \"none\" to verify -- but I still need to learn more about the intricacies of theme design and troubleshooting. As a toolmaker, I can never learn enough! A link to a howto for gtk-3 themes would be helpful...\nLATER: Well, all that did was to change one word in the error messages, which come from GTK at the creation of a new toplevel window. I'll try commenting out the entire stanza from the css file and see what that does.","Q_Score":0,"Tags":"python,themes,xfce","A_Id":52539588,"CreationDate":"2018-09-27T05:09:00.000","Title":"Theme engine missing?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"In which deployment mode can we Not add Nodes\/workers to a cluster in Apache Spark 2.3.1\n1.Spark Standalone\n2.Mesos\n3.Kubernetes\n4.Yarn\n5.Local Mode\ni have installed Apache Spark 2.3.1 on my machine and have run it in Local Mode\nin Local Mode can we add Nodes\/workers to Apache Spark?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":45,"Q_Id":52544955,"Users Score":0,"Answer":"When master is Local, your program will run on single machine that is your edge node.\nTo run it in distributed environment i.e. on cluster you need to select master as \"Yarn\".\nWhen deployment mode is \"client\" (default) your edge node will become the master (where driver program will run).\nWhen deployment mode is \"cluster\", any of the healthy node from the cluster becomes master","Q_Score":1,"Tags":"python-2.7,apache-spark,cluster-computing,worker","A_Id":52555122,"CreationDate":"2018-09-27T20:52:00.000","Title":"In which deployment mode can we \"Not\" add nodes to a cluster in Apache Spark 2.3.1","Data Science and Machine Learning":1,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm newbe of Sphinx,\nI tried to use html_theme = 'sphinx_rtd_theme' in conf.py\nbut I get message below when I run \"make html\" :\n\nsphinx_rtd_theme is no longer a hard dependency since version 1.4.0. Please install it manually.(pip install sphinx_rtd_theme)\n\nI already installed it with pip install sphinx_rtd_them \n(part of pip list)\n\nPackage                  Version \n\nalabaster                0.7.11 \n  sphinx-rtd-theme         0.4.1 \n  Sphinx                   1.8.1  \n\nAlso I installed sphinx-doc with brew.\nAnybody with same issue?? \nAnother things to know is...My ubuntu PC works perfectly,\n but not works on Macbook pro...","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":710,"Q_Id":52552081,"Users Score":1,"Answer":"Ok...WTF...I have no idea how it works,\nBut I ran \n\nbrew remove sphinx-doc\n\nand \"make html\" worked,\nIf anyone can answer why and how this happened, please let me know...","Q_Score":2,"Tags":"python,python-sphinx","A_Id":52552216,"CreationDate":"2018-09-28T09:17:00.000","Title":"sphinx not able to find sphinx_rtd_theme","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I have a dag that sets depends_on_past=True. So for most task we want this to hold.\nAnd a particular task A, we set trigger_rule=\"one_failed\"\nThe problem is. This task A don't always get triggered cause it's parents don't always fail. But if it doesn't get triggered everyday (say if we schedule everyday), then depends_on_past condition won't be met.\nMeaning. If day 1 didn't run. Then day 2 if a task fails, it doesn't run!\nHow do I set this BashOperator to ignore depends_on_past rule?","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":544,"Q_Id":52554906,"Users Score":1,"Answer":"You can overwrite depends_on_past parameter for specific task instance. So in your case, task A's definition can overwrite depends_on_past=False, while the rest of the tasks within your DAG still run with the value of depends_on_past=True.","Q_Score":1,"Tags":"python,airflow","A_Id":57075134,"CreationDate":"2018-09-28T12:02:00.000","Title":"Airflow setting dag depends on past with trigger rule","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"What is the best way to schedule an event for a month or a year from now?\nFor example, I want my program to send a notification one year after a customer's registration.\nI try to use celery with redis using the eta option but, at some point, the task multiplies and sends the same notification to the same customer (like 600 times). I also think that using a cronjob is not the best option. \nAny suggestions?","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":49,"Q_Id":52558051,"Users Score":4,"Answer":"You don't want to push something in the queue that you are not going to read for 1 year.\nStore registration date in the database. Write a program that reads the database and pushes information to a topic. You can run this program everyday and it will find all the people who should be notified.","Q_Score":0,"Tags":"python,django,scheduled-tasks","A_Id":52558161,"CreationDate":"2018-09-28T15:02:00.000","Title":"Schedule task for one year from now","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"In a Linux directory, I have several numbered files, such as \"day1\" and \"day2\". My goal is to write a code that retrieves the number from the files and add 1 to the file that has the biggest number and create a new file. So, for example, if there are files, 'day1', 'day2' and 'day3', the code should read the list of files and add 'day4'. To do so, at least I need to know how to retrieve the numbers on the file name.","AnswerCount":3,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":49,"Q_Id":52572007,"Users Score":0,"Answer":"Get all files with the os module\/package (don't have the exact command handy) and then use regex(package) to get the numbers. If you don't want to look into regex you could remove the letters  from your string with replace() and convert that string with int().","Q_Score":0,"Tags":"python,linux,python-3.x,file,ubuntu","A_Id":52572081,"CreationDate":"2018-09-29T19:52:00.000","Title":"Is there any way to retrieve file name using Python?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"My question is if you can install python with powershell, cmd, vbs or any other language built into Windows already?\nIf this was already asked please redirect me to the answer.\n\"How to install Python using Windows Command Prompt\" explains how to install the python if you already have the exe installed, not how to install the exe.\n\nEDIT: I am trying to install python with a file on a pc that does not have python installed, only thing restricted might be that the account does not an administrator and if possible in the background.","AnswerCount":5,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":80507,"Q_Id":52578270,"Users Score":0,"Answer":"Not related to the question directly, but some people may end up here looking for a different solution.\nTo use Python within Powershell:\n\nInstall Python from the Microsoft Store (an App in the programs list)\nOpen the Powershell window\n(can hold SHIFT and right click in the window where your python file is located\n'Open Powershell Window here')\ntype 'python' a space and the name of the file\nExample:\nPS C:\\Users...\\Project> python test.py","Q_Score":14,"Tags":"python,python-3.x,powershell,cmd","A_Id":66979854,"CreationDate":"2018-09-30T13:24:00.000","Title":"Install Python with cmd or powershell","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am using python's CLI module which takes any do_* method and sets it as a command, so a do_show() method will be executed if the user type \"show\".\nHow can I execute the do_show() method using any variation of capitalization from user input e.g. SHOW, Show, sHoW and so on without giving a Command Not Found error?\nI think the answer would be something to do with overriding the Cmd class and forcing it to take the user's input.lower() but idk how to do that :\/","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":108,"Q_Id":52580345,"Users Score":1,"Answer":"You should override onecmd to achieve desired functionality.","Q_Score":1,"Tags":"python","A_Id":52580602,"CreationDate":"2018-09-30T17:25:00.000","Title":"Python's cmd.Cmd case insensitive commands","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have just installed anaconda3 5.2.0 with vscode 1.27.2 on windows10  (actually, removed and reinstalled) and am trying to execute the simplest python code on terminal.  However, I get the following errors...\n\njac@p50:\/mnt\/c\/Users\/jac\/Documents\/dev\/python\/JupyterNotebooks\/Learn\/Pandas Learn$activate base\n  \/mnt\/c\/Users\/jac\/Anaconda3\/Scripts\/activate: 2: \/mnt\/c\/Users\/jac\/Anaconda3\/Scripts\/activate: cygpath: not found\n  \/mnt\/c\/Users\/jac\/Anaconda3\/Scripts\/activate: 3: .: Can't open \/etc\/profile.d\/conda.sh\n  jac@p50:\/mnt\/c\/Users\/jac\/Documents\/dev\/python\/JupyterNotebooks\/Learn\/Pandas Learn$\n  C:\/Users\/jac\/Anaconda3\/python.exe \"c:\/Users\/jac\/Documents\/dev\/python\/JupyterNotebooks\/Learn\/Pandas Learn\/hello1.py\"\n  -bash: C:\/Users\/jac\/Anaconda3\/python.exe: No such file or directory\n\nI do see the python.exe file at C:\/Users\/jac\/Anaconda3\/python.exe .  I also do not understand why terminal in bash.  I have used cygwin and installed ubuntu in my win10 machine.  I don't have extensive env setup experience, but really need to get vscode running to debug and need anaconda libraries (pandas) to get some work done.  Any help really appreciated.  Thanks,  John","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":1647,"Q_Id":52583127,"Users Score":1,"Answer":"OK, so the problem is that Anaconda + VSCode + WSL not playing nice.  I really don't have to run my python programs under WSL (bash.exe), so I changed the terminal>integrated>shell:windows value to C:\\WINDOWS\\System32\\cmd.exe, and unticked the Activate environment option.  Now I can execute and debug!  :)","Q_Score":2,"Tags":"python,visual-studio-code,anaconda","A_Id":52636238,"CreationDate":"2018-09-30T23:58:00.000","Title":"VSCode cannot find python (Anaconda install)","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm trying to install tensorflow but it needs a Python 3.6 installation and I only have Python 3.7 installed. I tried to switch using brew and pyenv but it doesn't work. \nDoes anyone know of a way to solve this problem?","AnswerCount":15,"Available Count":3,"Score":-0.0133325433,"is_accepted":false,"ViewCount":465711,"Q_Id":52584907,"Users Score":-1,"Answer":"I just now downgraded my Python 3.9 to 3.6 because I wanted to use the librosa package but it does not support Python 3.9 still now.\nSteps -\n\nGo to python official website\nDownload the Python version which you want\nInstall in your machine normally\n\nRun python3 --version in the terminal and it will show this version of Python.","Q_Score":129,"Tags":"python,python-3.x","A_Id":65210825,"CreationDate":"2018-10-01T05:14:00.000","Title":"How to downgrade python from 3.7 to 3.6","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm trying to install tensorflow but it needs a Python 3.6 installation and I only have Python 3.7 installed. I tried to switch using brew and pyenv but it doesn't work. \nDoes anyone know of a way to solve this problem?","AnswerCount":15,"Available Count":3,"Score":0.0,"is_accepted":false,"ViewCount":465711,"Q_Id":52584907,"Users Score":0,"Answer":"Download and install Python 3.6 and then change the system path environment variable to that of python 3.6 and delete the python 3.7 path system environment variable. Restart pc for results.","Q_Score":129,"Tags":"python,python-3.x","A_Id":65529929,"CreationDate":"2018-10-01T05:14:00.000","Title":"How to downgrade python from 3.7 to 3.6","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm trying to install tensorflow but it needs a Python 3.6 installation and I only have Python 3.7 installed. I tried to switch using brew and pyenv but it doesn't work. \nDoes anyone know of a way to solve this problem?","AnswerCount":15,"Available Count":3,"Score":-0.0133325433,"is_accepted":false,"ViewCount":465711,"Q_Id":52584907,"Users Score":-1,"Answer":"For those who want to add multiple Python version in their system:\nI easily add multiple interpreters by running the following commands:\n\nsudo apt update\nsudo apt install software-properties-common\nsudo add-apt-repository ppa:deadsnakes\/ppa\nsudo apt install python 3.x.x\nthen while making your virtual environment choose the interpreter of your choice.","Q_Score":129,"Tags":"python,python-3.x","A_Id":62893015,"CreationDate":"2018-10-01T05:14:00.000","Title":"How to downgrade python from 3.7 to 3.6","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I don't know if the problem is between me and Pyomo.DAE or between me and IPOPT. I am doing this all from the command-line interface in Bash on Ubuntu on Windows (WSL). When I run:\n\nJAMPchip@DESKTOP-BOB968S:~\/examples\/dae$ python3 run_disease.py\n\nI receive the following output:\n\nWARNING: Could not locate the 'ipopt' executable, which is required\n  for solver\n      ipopt Traceback (most recent call last):   File \"run_disease.py\", line 15, in \n      results = solver.solve(instance,tee=True)   File \"\/usr\/lib\/python3.6\/site-packages\/pyomo\/opt\/base\/solvers.py\", line\n  541, in solve\n      self.available(exception_flag=True)   File \"\/usr\/lib\/python3.6\/site-packages\/pyomo\/opt\/solver\/shellcmd.py\", line\n  122, in available\n      raise ApplicationError(msg % self.name) pyutilib.common._exceptions.ApplicationError: No executable found for\n  solver 'ipopt'\n\nWhen I run \"make test\" in the IPOPT build folder, I reecieved:\n\nTesting AMPL Solver Executable...\n      Test passed! Testing C++ Example...\n      Test passed! Testing C Example...\n      Test passed! Testing Fortran Example...\n      Test passed!\n\nBut my one major concern is that in the \"configure\" output was the follwing:\n\nchecking for COIN-OR package HSL... not given: No package 'coinhsl'\n  found\n\nThere were also a few warning when I ran \"make\". I am not at all sure where the issue lies. How do I make python3 find IPOPT, and how do I tell if I have IPOPT on the system for pyomo.dae to find? I am pretty confident that I have \"coibhsl\" in the HSL folder, so how do I make sure that it is found by IPOPT?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":1060,"Q_Id":52596464,"Users Score":0,"Answer":"As sascha states, you need to make sure that the directory containing your IPOPT executable (likely the build folder) is in your system PATH. That way, if you were to open a terminal and call ipopt from an arbitrary directory, it would be detected as a valid command. This is distinct from being able to call make test from within the IPOPT build folder.","Q_Score":0,"Tags":"python,pyomo,ipopt","A_Id":52612398,"CreationDate":"2018-10-01T18:01:00.000","Title":"\"No package 'coinhsl' found\": IPOPT compiles and passes test, but pyomo cannot find it?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have one master server and 6 worker servers (each with a couple workers running on them). All of a sudden, after many months of flawless execution, all of the tasks stopped getting executed, even though there were no code changes. Now, even after rebooting all the servers involved, restarting RabbitMQ, restarting the workers, etc, it appears as though the servers aren't able to find each other, and thus no tasks can be completed.\nWhen I run celery -A proj inspect active, the response is Error: No nodes replied within time constraint. I'm also able to connect to the broker using Flower, but it lists no workers, even though the workers are running and pointing to the same broker. On the master server, which is in charge of adding tasks, my application now appears to hang indefinitely on apply_async.\nIn my application, I have the broker set to pyamqp, and the backend set to rpc:\nCelery('proj', broker='pyamqp:\/\/[master server's IP]', backend='rpc:\/\/[master server's IP]')\nI feel like I'm missing something really simple, but I can't figure out what it is.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":1156,"Q_Id":52616841,"Users Score":0,"Answer":"Navigating to \/var\/log\/rabbitmq\/rabbit@[server-name].log and scrolling back to when the issue first occurred led me to this message Disk free space limit now exceeded. Free bytes:999378944 Limit:1000000000. \nTurns out the hard drive was filled to the brim, which was causing all sorts of trouble for RabbitMQ and Celery, it seems. Freeing up space resolved all issues entirely.","Q_Score":0,"Tags":"python,rabbitmq,celery","A_Id":52619210,"CreationDate":"2018-10-02T21:43:00.000","Title":"Celery tasks suddenly stop executing, nodes can't find each other","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"Is it possible to leverage command line tools within GCP Dataflow? \nEssentially, I have files that I currently pass as arguments into a command line tool, and that tool outputs a different file based on the input. I'm not exactly sure what the tool does so recreating the logic within Dataflow is out of question. Is there any way to call this tool using the os or subprocess modules while still taking advantage of Dataflow's benefits?","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":94,"Q_Id":52653052,"Users Score":1,"Answer":"Yes, you can call out to sub-processes inside of your graph. However, there are some implications to doing this. Example: Inside of your DoFn() you might do something like: shell(call legacy exe to produce flat file). At this point you will have to manually block on that call or create sometime of orchestration to process the output. There is no callback or dispatching mechanism in Apache Beam. The main side effect of this scenario is that you are now blocking the DoFn from doing anymore work - thus burning cycles just blocking. If this sub-process calls are light, probably not an issue - if they are resource intensive e.g. sequence this genome - you are going to hit some issues.\nA more flexible and effective way to do this type of work is to mix Cloud Composer with Cloud Dataflow. Use Dataflow for work that needs aggregation and then dispatch long running (sub-process) work to Cloud Composer. For example: Analyze population of 1B people, find top Y people with features of X. Then dispatch long running processes to do sub-process analysis on the Y.\nDoes this help?","Q_Score":1,"Tags":"python,google-cloud-platform,google-cloud-dataflow,apache-beam","A_Id":52667399,"CreationDate":"2018-10-04T18:13:00.000","Title":"Google Cloud Platform Dataflow integration","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"As python has two ways to code one from python command and one from python shell what is the difference between these two?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":10773,"Q_Id":52676663,"Users Score":8,"Answer":"Python Shell is a command line tool that starts up the python interpreter. You can test simple programs and also write some short programs. However, in order to write a more complexed python program you need an editor. IDLE, on the other hand, has combined the above two needs and bundled them as a package. IDLE consists of Python Shell, and Text editor that supports highlights for python grammar and etc.","Q_Score":2,"Tags":"python","A_Id":52676711,"CreationDate":"2018-10-06T07:18:00.000","Title":"what is the difference between python shell and IDLE?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am working in RedHat OpenStack project and I need to know good test cases for reliability, performance, and function test cases for RedHat OpenStack. I already looked at the Tempest test. but I'm asking if there's any other test I can follow?","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":124,"Q_Id":52684200,"Users Score":1,"Answer":"I realize that you mention that you've already looked at Tempest, but I would strongly encourage you to take a second look. I understand that the documentation is a little underwhelming and tailoring the tempest configuration to your deployment can be a significant time investment. Beyond its documentation, it's a well-maintained OpenStack project and running sanity checks doesn't take too long to configure. The results can be truly revealing.\nCreate a tempest workspace and conduct sanity checks with --smoke or -s\nCreate a workspace with tempest init myworkspace. This will create the directory structure for you based off of what exists in \/etc\/tempest. If you've already configured your \/etc\/tempest, you're a step ahead, otherwise, you'll need to configure your myworkspace\/etc\/tempest.conf before running any test.\nOnce your workspace is configured for your deployment, execute tempest run --smoke from the workspace directory. This will execute ~100 smoke tests for basic cloud functionality and sanity testing. With my modest deployment, this doesn't take more than 3-5 minutes to get some worthwhile results.\nResults from --subunit\nContinuing with the myworkspace directory, running your smoketests with the --subunit flag (tempest run --smoke --subunit) produces the html-exportable subunit docs at workspace\/.stestr\/$iteration where $iteration is a 0-indexed iteration of tempest run you've executed.\nFor example, after your first iteration, run subunit2html .stestr\/0 to generate a well-formatted results.html for your review.\nBeyond Smoketesting\nIf you start here and iterate, I think it naturally progresses into running the full gamut of tests. The workflow is a bit different from the smoke testing:\n\nGenerally start with tempest cleanup --init-saved-state which will produce a pre-test state of your cloud, a veritable snapshot of the resources you do not want to cleanup in post. The state is stored at saved_state.json.\nRun your tests with options tailored to your deployment, most basically tempest run.\nAfter analyzing your results, a run of tempest cleanup will destroy resources that do not exists in the saved_state.json file.","Q_Score":0,"Tags":"python,cloud,integration-testing,redhat,openstack","A_Id":52689994,"CreationDate":"2018-10-06T23:29:00.000","Title":"Test cases for Redhat OpenStack?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I just installed the conda clean package and anaconda navigator.\nWhen I use the command anaconda-navigator it says command not found\nSame goes for anaconda-clean.\nWhen I type in the respective installation commands the terminal says that requirements are already fulfilled.\nOS - Ubuntu 16.04 LTS","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":83,"Q_Id":52691790,"Users Score":0,"Answer":"Updating conda fixed the problem.","Q_Score":0,"Tags":"python,linux,anaconda","A_Id":52709357,"CreationDate":"2018-10-07T18:53:00.000","Title":"Cannot execute conda commands even though conda is installed","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am using ElastiCache for Redis on AWS. But, I'm not able to connect to Redis from localhost. I have used the endpoint on AWS. It always shows connection timed out. Is there a way to make it work?","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":511,"Q_Id":52705563,"Users Score":0,"Answer":"The first thing you should make sure is the VPC Security Group that the Elasticache Redis is attached, allows Custom TCP traffic from your address to port number 6379 (default for Redis). \nFor me the connection timed out issue arised due to the inaccessibility to the VPC where the Redis cluster resides.","Q_Score":1,"Tags":"python,amazon-web-services,redis,amazon-elasticache","A_Id":52706805,"CreationDate":"2018-10-08T15:27:00.000","Title":"Connecting to Redis from localhost","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I am using ElastiCache for Redis on AWS. But, I'm not able to connect to Redis from localhost. I have used the endpoint on AWS. It always shows connection timed out. Is there a way to make it work?","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":511,"Q_Id":52705563,"Users Score":0,"Answer":"Check your security group of Elastic cache cluster. It should allow port 6379 from the EC2 instance. You can allow your EC2 instance's security group in Elastic cache security group to access port 6379.","Q_Score":1,"Tags":"python,amazon-web-services,redis,amazon-elasticache","A_Id":52707528,"CreationDate":"2018-10-08T15:27:00.000","Title":"Connecting to Redis from localhost","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I have a python script that reads data from an OPCDA server and then push it to InfluxDB.\nSo basically it connects to the OPCDA using the OpenOPC library and to InfluxDB using the InfluxDB Python client and then starts an infinite while loop that runs every 5 seconds to read and push data to the database.\nI have installed the script as a Service using NSSM. What is the best practice to ensure that the script is running 24\/7 ? How to avoid crashes ?\nShould i daemonize the script ?\nThank you in advance,\nBnjroos","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":534,"Q_Id":52713401,"Users Score":0,"Answer":"I suggest at least to add logging at the script level. You could also use custom Exit Codes from python so NSSM knows to report failure. Your failure would probably be when connecting to your services so, i.e. netowrk down or something so you could write custom exceptions for NSSM to restart. If it's running every 5 seconds you would probably know very soon.\nEnsuring availability and avoiding crashes is about your code more than infrastructure, hence the above recommendations. \nI believe using NSSM (for scheduling and such) is better than daemonizing, since you're basically adding functionality of NSSM in your script and potentially adding more code that may fail.","Q_Score":1,"Tags":"python,windows,loops,service","A_Id":52713941,"CreationDate":"2018-10-09T04:28:00.000","Title":"Best practice for an infinite loop Python script that runs on Windows as a Service","Data Science and Machine Learning":0,"Database and SQL":1,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"If I forget to add the Python to the path while installing it, how can I add it to my Windows path?\nWithout adding it to the path I am unable to use it. Also if I want to put python 3 as default.","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":164,"Q_Id":52718655,"Users Score":1,"Answer":"Edit Path in Environment Variables\nAdd Python's path to the end of the list (these are separated by ';').\nFor example:\n\nC:\\Users\\AppData\\Local\\Programs\\Python\\Python36;\nC:\\Users\\AppData\\Local\\Programs\\Python\\Python36\\Scripts\n\nand if you want to make it default\nyou have to edit the system environmental variables\nedit the following from the Path\n\nC:\\Windows;C:\\Windows\\System32;C:\\Python27\n\nNow Python 3 would have been become the default python in your system\nYou can check it by python --version","Q_Score":1,"Tags":"python,windows,path","A_Id":52718656,"CreationDate":"2018-10-09T10:19:00.000","Title":"Add Python to the Windows path","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"We've built a large python repo that uses lots of libraries (numpy, scipy, tensor flow, ...) And have managed these dependencies through a conda environment. Basically we have lots of developers contributing and anytime someone needs a new library for something they are working on they 'conda install' it. \nFast forward to today and now we need to deploy some applications that use our repo. We are deploying using docker, but are finding that these images are really large and causing some issues, e.g. 10+ GB. However each individual application only uses a subset of all the dependencies in the environment.yml. \nIs there some easy strategy for dealing with this problem? In a sense I need to know the dependencies for each application, but I'm not sure how to do this in an automated way. \nAny help here would be great. I'm new to this whole AWS, Docker, and python deployment thing... We're really a bunch of engineers and scientists who need to scale up our software. We have something that works, it just seems like there has to be a better way .","AnswerCount":3,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":2376,"Q_Id":52719729,"Users Score":3,"Answer":"First see if there are easy wins to shrink the image, like using Alpine Linux and being very careful about what gets installed with the OS package manager, and ensuring you only allow installing dependencies or recommended items when truly required, and that you clean up and delete artifacts like package lists, big things you may not need like Java, etc.\nThe base Anaconda\/Ubuntu image is ~ 3.5GB in size, so it's not crazy that with a lot of extra installations of heavy third-party packages, you could get up to 10GB. In production image processing applications, I routinely worked with Docker images in the range of 3GB to 6GB, and those sizes were after we had heavily optimized the container.\nTo your question about splitting dependencies, you should provide each different application with its own package definition, basically a setup.py script and some other details, including dependencies listed in some mix of requirements.txt for pip and\/or environment.yaml for conda.\nIf you have Project A in some folder \/ repo and Project B in another, you want people to easily be able to do something like pip install <GitHub URL to a version tag of Project A> or conda env create -f ProjectB_environment.yml or something, and voila, that application is installed.\nThen when you deploy a specific application, have some CI tool like Jenkins build the container for that application using a FROM line to start from your thin Alpine \/ whatever container, and only perform conda install or pip install for the dependency file for that project, and not all the others.\nThis also has the benefit that multiple different projects can declare different version dependencies even among the same set of libraries. Maybe Project A is ready to upgrade to the latest and greatest pandas version, but Project B needs some refactoring before the team wants to test that upgrade. This way, when CI builds the container for Project B, it will have a Python dependency file with one set of versions, while in Project A's folder or repo of source code, it might have something different.","Q_Score":5,"Tags":"python,amazon-web-services,docker","A_Id":52719901,"CreationDate":"2018-10-09T11:15:00.000","Title":"Deploying python with docker, images too big","Data Science and Machine Learning":1,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have been trying to install Caffe on my mac running OSX 10.13.6\nI have followed several guides, including the installation guide on the caffe site. I have erased everything and restarted several times. I get the same problem no matter what. When I go to compile everything I am getting this\nScanning dependencies of target caffeproto\n[  1%] Building CXX object src\/caffe\/CMakeFiles\/caffeproto.dir\/__\/__\/include\/caffe\/proto\/caffe.pb.cc.o\nIn file included from \/Users\/Name\/Documents\/Programming\/PythonEnv\/caffe\/build\/include\/caffe\/proto\/caffe.pb.cc:4:\nIn file included from \/Users\/Name\/Documents\/Programming\/PythonEnv\/caffe\/build\/include\/caffe\/proto\/caffe.pb.h:9:\n\/usr\/local\/include\/google\/protobuf\/stubs\/common.h:209:17: error: expected\n      expression\n  OnShutdownRun([](const void* p) { delete static_cast<const T*>(p); }, p);\n                ^\nIn file included from \/Users\/Name\/Documents\/Programming\/PythonEnv\/caffe\/build\/include\/caffe\/proto\/caffe.pb.cc:4:\nIn file included from \/Users\/Name\/Documents\/Programming\/PythonEnv\/caffe\/build\/include\/caffe\/proto\/caffe.pb.h:25:\nIn file included from \/usr\/local\/include\/google\/protobuf\/generated_message_table_driven.h:34:\nIn file included from \/usr\/local\/include\/google\/protobuf\/map.h:49:\nIn file included from \/usr\/local\/include\/google\/protobuf\/map_type_handler.h:35:\nIn file included from \/usr\/local\/include\/google\/protobuf\/wire_format_lite_inl.h:43:\n\/usr\/local\/include\/google\/protobuf\/message_lite.h:117:3: error: unknown type\n      name 'constexpr'\n  constexpr const T& get() const { return reinterpret_cast<const T&>(union_); }\n\nI have also tried using CMake and run into the same problem. I'm not sure where to go from here. I am not incredibly knowledgable about building processes so I apologize if this is vague and will be happy to provide whatever other information might help fix this. \nThank you!","AnswerCount":3,"Available Count":1,"Score":0.3215127375,"is_accepted":false,"ViewCount":1086,"Q_Id":52728417,"Users Score":5,"Answer":"If compiling with make, change Makefile as follows:\n- CXXFLAGS += -pthread -fPIC $(COMMON_FLAGS) $(WARNINGS)\n+ CXXFLAGS += -pthread -fPIC $(COMMON_FLAGS) $(WARNINGS) -std=c++11","Q_Score":4,"Tags":"python,macos,machine-learning,caffe","A_Id":54394139,"CreationDate":"2018-10-09T19:55:00.000","Title":"OSX Caffe Compilation Fails With Expected Expression Error","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a task written in Python with a 1-2 minute run-time that I want to run on-demand. The requests would come In very small volumes from a Django server on Linux. The return would be a file.\nUsually, I'd use a queue system like Celery. But, this task can only be run on Windows.\nWhat is the best way to make this happen?\nRemotely execute the task by establishing an SSH session? \nStill use Celery, go through a lot of workarounds to get it to work on Windows (seems messy)?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":65,"Q_Id":52732565,"Users Score":0,"Answer":"I could think of 5 solutions which do not require ssh\nI didn't talk about authentication in my solutions you should implement something based on chosen solution \nSolution 1:\n\nwrite a simple flask\/django app for windows server which runs the task and returns response\nin your linux server send a request to windows and get data\nlinux server can make this call using celery so you wouldn't bother about 2\/3 minute wait\n\nSolution 2:\n\nwrite a simple flask\/django app for windows server which calls a celery task in back ground\n\n\nthis app should return the url of result file\n\ncelery task creates a file which contains the result\nserve this file with nginx (or a windows based static file server, I don't know windows)\nsend a request from linux server to windows to get result (if file doesn't exists it means result is not ready yet)\n\nSolution 3:\n\nwrite a simple flask\/django app for windows server which calls a celery task in back ground\n\n\nthis app returns a random id for given request\n\nfrom your linux server send requests to windows app with task id\nwhen task is finished windows app returns result\n\nSolution 4:\n\nwrite a simple flask\/django app for windows server which calls a celery task in back ground\nadd an endpoint to your linux django app for uploading data\nwhen windows app finishes processing it uploads data to linux django app\n\nSolution 5:\n\nsolution 4 but your linux django app is not for uploading data. it only sets a boolean which mean task is done\nif task is done linux server send a request to winsows server to get data (this request contains the task id)","Q_Score":0,"Tags":"python,django,linux,windows,python-3.x","A_Id":52735547,"CreationDate":"2018-10-10T04:17:00.000","Title":"Best way to run task on Windows from web server on Linux","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I am new in the Cloud\nand I have an python script that I call from a bash script with parameters. this app run on Linux and required some python modules as well. \nI would like to deploy this app on the AWS cloud and make it run on a given schedule.\nWhat is the best way to deploy this app (AWS Lambda or EC2).\nThanks\nNono","AnswerCount":2,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":293,"Q_Id":52745181,"Users Score":2,"Answer":"Cheapest way is AWS Lambda, but you'll have to get rid of the bash script and modify your Python script some.\nEasiest way is EC2, because it's just a Linux server that you can login to and install whatever you want and setup your script on a cron job just like your local Linux server.","Q_Score":0,"Tags":"python,amazon-web-services,amazon-ec2,aws-lambda","A_Id":52745223,"CreationDate":"2018-10-10T16:50:00.000","Title":"Deploy Python\/Bash application on Aws","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have the following situation:\nThere are a thousand processes and each of them has the following task:\n\n1) choose a nr X from 1 to 1 000 \n2) if X.txt does exists, go to (1)\n3) Open X.txt and write \"hello this is process_id\".\n\nNow, my question is, if I use open('X.txt', 'wx') is it possible that at some point 2 processes will be able to open the file the same time, because they will at the same time say: \"ok, X.txt doesnt exist, so lets open it for writing\"?\nIf it is possible, is there a safety mechanism I could use, for example when I close the file, check if I was the only process that was writing to this file?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":174,"Q_Id":52771242,"Users Score":0,"Answer":"Since you're always using the x flag to open, you're safe and don't have to worry about anything else. Only one process (the one that actually created the file) will succeed at opening it.","Q_Score":0,"Tags":"python","A_Id":52771286,"CreationDate":"2018-10-12T02:11:00.000","Title":"2 processes opening a file at the same time","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Problem\nI want to secure my Raspberry pi in a special way.\nI would like to start up raspberry pi without entering a password as pi user.\nHowever, I want pi user to have zero privilege. Cant read a file, cant copy a file, simply nothing. And without access to root->'sudo su'. On the other hand when raspberry pi starts itself with pi user, I want backend process to be running as root. So to put it simply, I want it like in a zoo - two worlds but neither of them can enter the other. Clients can be present, see what process are running, see files in directories, but cant read it, copy, remove and etc. In the same time I want the backend to be untouched and running and writing files.\nReason:\nI have raspberri pi product - customer get it home, when plug in power supply,RPi starts up and runs backend programs with root privilege and communicates with my desktop software.\nBut I dont want curious customer that plugs in HDMI and see my code. I also dont want him to take the SD card and extract the code. \nI heard its possible to reverse engineer the code even if compiled. So I simply want the programs(python script) to be there but cannot be accessed in any way.\nIs it possible to make such protection?\nThanks in advance","AnswerCount":2,"Available Count":1,"Score":0.3799489623,"is_accepted":false,"ViewCount":2009,"Q_Id":52777186,"Users Score":4,"Answer":"You may consider to use the following approach \n\nUse at least two levels of hashing with MAC address and ARM chip serial number (via cat \/proc\/cpuinfo) with additional secret keys. Run your program only if the stored license key is the same as the result of doubly-hashed functions.\nOptionally, you could rewrite critical part of your code in C, compile it statically, and remove all debug symbols. Call it using Python. \nQuick optimization of your code using cython. Call its generated shared objects with a python caller script. Distribute only the shared objects and the python caller script.\n\nThis will prevent most people from reverse engineering your codes.","Q_Score":0,"Tags":"python,raspberry-pi,root,privileges,protection","A_Id":52777984,"CreationDate":"2018-10-12T10:05:00.000","Title":"Raspberry pi protection against reverse engineering the codes","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I installed Anaconda 3 and wanted to execute python from the shell. It returned that it's either written wrong or does not exist. Apparently, I have to add a path to the environmentle variable.\nCan someone tell how to do this?\nEnvironment: Windows 10, 64 bit and python 3.7\nPs: I know the web is full with that but I am notoriously afraid to make a mistake. And I did not find an exact entry for my environment. Thanks in advance.\nBest Daniel","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":4417,"Q_Id":52792102,"Users Score":0,"Answer":"Windows:\n\nsearch for -->Edit the system environment variables\nIn Advanced tab, click Environment variabless\nIn System variables, Select PATH and click edit. Now Click new, ADD YOU PATH.\nClick Apply and close.\n\nNow, check in command prompt","Q_Score":0,"Tags":"python-3.x,path,environment-variables","A_Id":52792181,"CreationDate":"2018-10-13T10:45:00.000","Title":"python 3.7 setting environment variable path","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I need use Python 3.6 in my project, I change my path .\/bashrc with:\nalias python=python3 on the first line.\nMy problem is, I need use Pip and Pipenv, and when I try install these packages, they are installed for python 2.7, and When I run these commands, they run with python2.7.\nI need change my Python path to 3.6 and Pip and Pipenv use with Python 3.6.\nWhat do I do?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":1856,"Q_Id":52799773,"Users Score":1,"Answer":"Install the Python 3 version of Pip for Ubuntu: $ apt install python3-pip and invoke it with $ pip3","Q_Score":0,"Tags":"python,python-3.x,python-2.7,pip,pipenv","A_Id":52800219,"CreationDate":"2018-10-14T05:33:00.000","Title":"How to Change Change Python 2.7 to Python 3,6 in UBuntu?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Say that most of my DAGs and tasks in AirFlow are supposed to run Python code on the same machine as the AirFlow server.\nCan I have different DAGs use different conda environments? If so, how should I do it? For example, can I use the Python Operator for that? Or would that restrict me to using the same conda environment that I used to install AirFlow.\nMore generally, where\/how should I ideally activate the desired conda environment for each DAG or task?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":1210,"Q_Id":52805712,"Users Score":4,"Answer":"The Python that is running the Airflow Worker code, is the one whose environment will be used to execute the code.\nWhat you can do is have separate named queues for separate execution environments for different workers, so that only a specific machine or group of machines will execute a certain DAG.","Q_Score":6,"Tags":"python,python-3.x,anaconda,conda,airflow","A_Id":52834527,"CreationDate":"2018-10-14T18:17:00.000","Title":"Python tasks and DAGs with different conda environments","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Idle3 (of python3) regularly crashes when in a window and using the middle mousewheel.\nThere is always the same error left in Terminal:\n\nTraceback (most recent call last):   File \"\/usr\/local\/bin\/idle3\", line 5, in   main()   File\n  \"\/usr\/local\/Cellar\/python\/3.7.0\/Frameworks\/Python.framework\/Versions\/3.7\/lib\/python3.7\/idlelib\/pyshell.py\",\n  line 1548, in main\n      root.mainloop()   File\n  \"\/usr\/local\/Cellar\/python\/3.7.0\/Frameworks\/Python.framework\/Versions\/3.7\/lib\/python3.7\/tkinter\/init.py\", line 1280, in mainloop  self.tk.mainloop(n)\nUnicodeDecodeError: 'utf-8' codec can't decode byte 0xFF in position 0: invalid continuation byte\n  `","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":852,"Q_Id":52818660,"Users Score":1,"Answer":"The problem seems to be that brew installed python without tcl-tk, thus using the old tcl-tk from mac-os. This one has a problem interpreting some mousewheel commands.\nThe solution  : \nbrew reinstall python --with-tcl-tk","Q_Score":1,"Tags":"python,python-3.x,macos","A_Id":52818661,"CreationDate":"2018-10-15T14:10:00.000","Title":"My Idle (idle3) from python installed with homebrew on a mac crashes","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":1,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I built an application using  cookiecutter-django by @pydanny back in May,\ndocker-compose was used for both dev and production environments and it's running very well,\nNow I have a requirement for asynchronous tasks and I want to use Celery,\nI did not choose celery when using the cookiecutter tool way back at the beginning,\nWhat's the best way to integrate celery into my project ?\nAlso noting that I will probably take this opportunity to upgrade docker-compose from version 2 to 3, bring mailgun, Django etc. to the latest versions\nIs it too messy to integrate to a live project ?\nShould I just create a new project using the cookiecutter tool ?\nNot too sure how to approach this so any help would be greatly appreciated,\nThanks","AnswerCount":1,"Available Count":1,"Score":0.537049567,"is_accepted":false,"ViewCount":509,"Q_Id":52819276,"Users Score":3,"Answer":"I solved this by creating a new project from scratch using cookiecutter-django, this time including celery, flower etc. for async tasks. I then migrated my code to the new project. It didn't take too long, you just need to be careful when migrating that you don't miss anything.","Q_Score":4,"Tags":"python,django,docker-compose,cookiecutter-django","A_Id":53374105,"CreationDate":"2018-10-15T14:43:00.000","Title":"Django Cookiecutter upgrade best practice","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"Is it possible to create a standalone Linux executable of python code using a Windows machine? My development setup is in Windows, and I need the standalone app for my prod Unix box.\nI have tried pyinstaller with combinations of inputs, and every time, it creates an .exe file.  Is there any other alternative or workaround which I can try?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":1291,"Q_Id":52819909,"Users Score":3,"Answer":"No, there is no way to do this with PyInstaller and just a Windows development machine.\nPyInstaller creates executables for the system you're running it on. If you run it on a Windows machine, you get a Windows executable.\nIn the past, I solved this problem by creating a Linux development VM, and running PyInstaller there; it creates a Linux executable appropriately.","Q_Score":3,"Tags":"python,python-3.x,pyinstaller","A_Id":52820092,"CreationDate":"2018-10-15T15:19:00.000","Title":"Build Python Standalone Executable for Linux using Windows Machine","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I vaguely remember that the default value of execution_timeout is 15 minutes or 30 minutes but I couldn't find a relevant document anywhere. What is the default value?","AnswerCount":3,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":3798,"Q_Id":52827541,"Users Score":0,"Answer":"The default task execution_timeout value for all the operators is None.\nIf not specified, then the value is considered as None, meaning that the operators are never timed out by default.","Q_Score":3,"Tags":"python,python-3.x,airflow","A_Id":72473721,"CreationDate":"2018-10-16T03:23:00.000","Title":"Default value of execution_timeout in Python Operator in Airflow","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I vaguely remember that the default value of execution_timeout is 15 minutes or 30 minutes but I couldn't find a relevant document anywhere. What is the default value?","AnswerCount":3,"Available Count":2,"Score":0.0665680765,"is_accepted":false,"ViewCount":3798,"Q_Id":52827541,"Users Score":1,"Answer":"PythonOperator inherits from BaseOperator so you should checkout BaseOperator's document.","Q_Score":3,"Tags":"python,python-3.x,airflow","A_Id":52833168,"CreationDate":"2018-10-16T03:23:00.000","Title":"Default value of execution_timeout in Python Operator in Airflow","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a legacy Windows application which performs a critical business function. It has no API or official support for automation. This program requires a human to perform a sequence of actions in order to convert files in a particular input format into a PDF, from which we can scrape content and then process the data normally.\nThe business literally cannot function without some calculations\/reports that this software performs, but unfortunately, those calculations are poorly understood and we don't have the kind of R&D budget that would allow us to re-implement the software.\nThe software reads in a proprietary file format and generates a number of PDF reports in an industry-approved format, from which we can scrape the images and deal with them in a more conventional way. \nIt has been proposed that we wrap up the application inside some kind of API, where I might submit some input data into a queue, and somewhere deep within this, we automate the software as if a human user was driving it to perform the operations.\nUnfortunately, the operations are complex and depend on a number of inputs, and also the content of the file being processed. It's not the kind of thing that we could do with a simple macro - some logic will be required to model the behavior of a trained human operator. \nSo are there any solutions to this? We'd like to be able to drive the software as quickly as possible, and since we have many Python developers it makes sense to implement as much as possible in Python. The outer layers of this system will also be in Python, so that could cut out the complexity. Are there any tools which already provide the bulk of this kind of behavior?","AnswerCount":3,"Available Count":1,"Score":0.0665680765,"is_accepted":false,"ViewCount":1820,"Q_Id":52832504,"Users Score":1,"Answer":"Try out Robotic automation tools, which can mimic or record human interactions with computer and repeat over time. It can be made for handling more complex tasks using scripts depends on that software. Example selecting different inputs, browser components and also windows application.","Q_Score":4,"Tags":"python,windows,automation","A_Id":52832686,"CreationDate":"2018-10-16T09:42:00.000","Title":"Tools for automating windows applications (preferably in Python)?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am developing a python application that calls on some matlab scripts using eng = engine.start_matlab(). This works fine on my local. \nI am trying to deploy using Docker. When I try to build the image, the error is related to matlab not installed. \nIs what I am trying to do possible? Any suggestions are appreciated.","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":404,"Q_Id":52863836,"Users Score":0,"Answer":"Can you explain what you did to install and verify Matlab in the docket container?\nI think of docker containers as micro VMs, so if the application isn\u2019t in the container it can\u2019t be accessed by other apps in the container. Hope I got that concept right!","Q_Score":0,"Tags":"python,matlab,docker","A_Id":52864576,"CreationDate":"2018-10-17T21:25:00.000","Title":"Python Matlab Engine in Docker","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a problem with installing numpy with python 3.6 and i have windows 10 64 bit \nPython 3.6.6 \nBut when i typed python on cmd this appears \nPython is not recognized as an internal or external command \nI typed py it solves problem but how can i install numpy \nI tried to type commant set path =c:\/python36 \nAnd copy paste the actual path on cmd but it isnt work \nI tried also to edit the enviromnent path through type a ; and c:\/python 36 and restart but it isnt help this \nI used pip install nupy and download pip but it isnt work","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":63,"Q_Id":52866467,"Users Score":0,"Answer":"Try pip3 install numpy. To install python 3 packages you should use pip3","Q_Score":1,"Tags":"python,numpy,scipy,installation","A_Id":52866580,"CreationDate":"2018-10-18T03:14:00.000","Title":"How can i make computer read a python file instead of py?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a problem with installing numpy with python 3.6 and i have windows 10 64 bit \nPython 3.6.6 \nBut when i typed python on cmd this appears \nPython is not recognized as an internal or external command \nI typed py it solves problem but how can i install numpy \nI tried to type commant set path =c:\/python36 \nAnd copy paste the actual path on cmd but it isnt work \nI tried also to edit the enviromnent path through type a ; and c:\/python 36 and restart but it isnt help this \nI used pip install nupy and download pip but it isnt work","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":63,"Q_Id":52866467,"Users Score":0,"Answer":"On Windows, the py command should be able to launch any Python version you have installed. Each Python installation has its own pip. To be sure you get the right one, use py -3.6 -m pip instead of just pip.\n\nYou can use where pip and where pip3 to see which Python's pip they mean. Windows just finds the first one on your path.\n\nIf you activate a virtualenv, then you you should get the right one for the virtualenv while the virtualenv is active.","Q_Score":1,"Tags":"python,numpy,scipy,installation","A_Id":52866587,"CreationDate":"2018-10-18T03:14:00.000","Title":"How can i make computer read a python file instead of py?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"My pyglet application fails to run, only giving the error ImportError: Library \"GLU\" not found. I have installed PyOpenGL and libgl1 across the system, in the virtualenv, and tried reinstalling everything multiple times. Nothing seems to help. Similiar questions mention it may be related to my graphics card, which is Intel Corporation HD Graphics 5500 (rev 09). Anyone have any ideas?\nFurther details\n\nPython version: 3.7\nIDE: Pycharm Community\nOS: elementaryOS v5.0 Juno\nInstallation method: Flatpak\nGraphics Driver: Intel Corporation Broadwell-U Integrated Graphics","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":1370,"Q_Id":52885954,"Users Score":1,"Answer":"Don't install pycharm through flatpak, for whatever reason that doesn't work. Install it through the pycharm website.","Q_Score":0,"Tags":"python,opengl,pycharm,pyglet","A_Id":52909744,"CreationDate":"2018-10-19T04:34:00.000","Title":"Pyglet fails to load GLU library","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":1,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have installed Python 3.7 on my system and I am running one simple python file in which imports a .pyd file. When running the script I got error like:\n\nTraceback (most recent call last):\n        File \"demoTemp\\run.py\", line 1, in \n        from pyddemo import fun\n        ModuleNotFoundError: No module named 'pyddemo'\n\npyddemo is pyd file.\nIs there any dependency for pyd file?\nThanks","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":886,"Q_Id":52886756,"Users Score":0,"Answer":"I found solution of my problem its just mismatch of python version in which I have created pyd and python version in which I am using it.","Q_Score":1,"Tags":"python-3.x","A_Id":52890342,"CreationDate":"2018-10-19T06:12:00.000","Title":"PYD file not found","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a multibranch pipeline set up in Jenkins that runs a Jenkinsfile, which uses pytest for testing scripts, and outputs the results using Cobertura plug-in and checks code quality with Pylint and Warnings plug-in.\nI would like to test the code with Python 2 and Python 3 using virtualenv, but I do not know how to perform this in the Jenkinsfile, and Shining Panda plug-in will not work for multibranch pipelines (as far as I know). Any help would be appreciated.","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":1383,"Q_Id":52890995,"Users Score":1,"Answer":"You can do it even using vanilla Jenkins (without any plugins). 'Biggest' problem will be with proper parametrization. But let's start from the beginning.\n2 versions of Python\nWhen you install 2 versions of python on a single machine you will have 2 different exec files. For python2 you will have python and for python3 you will have python3. Even when you create virtualenv (use venv) you will have both of them. So you are able to run unittests agains both versions of python. It's just a matter of executing proper command from batch\/bash script.\nJenkins\nThere are many ways of performing it:\n\nyou can prepare separate jobs for both python 2 and 3 versions of tests and run them from jenkins file\nyou can define the whole pipeline in a single jenkins file where each python test is a different stage (they can be run one after another or concurrently)","Q_Score":2,"Tags":"python,jenkins,github,continuous-integration,jenkins-pipeline","A_Id":52892540,"CreationDate":"2018-10-19T10:55:00.000","Title":"Running Jenkinsfile with multiple Python versions","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I want to perform some operations in my application when any new listed process starts or stops in Windows OS.\nI read subprocess module, but didn't get a clue.\nCan any one knows which method is called when new process is started, or how I can override which os module method to achieve my goal.\nPlease help me to resolve it.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":50,"Q_Id":52899460,"Users Score":0,"Answer":"The best way to do this is to store all the processes at the beginning of the program using some sort of Array.  Have a thread that constantly checks for changes inside the array.  If it detects a change send \"an interrupt\" into the main process.","Q_Score":0,"Tags":"python,python-3.x,windows,operating-system","A_Id":52900165,"CreationDate":"2018-10-19T20:25:00.000","Title":"How to get any new process start and stop in OS?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I got a requirement to parse the message files in .txt format real time as and when they arrive in incoming windows directory. The directory is in my local Windows Virtual Machine something like D:\/MessageFiles\/\nI wrote a Python script to parse the message files because it's a fixed width file and it parses all the files in the directory and generates the output. Once the files are successfully parsed, it will be moved to archive directory. Now, i would like to make this script run continuously so that it looks for the incoming message files in the directory D:\/MessageFiles\/ and perform the processing as and when it sees the new files in the path. \nCan someone please let me know how to do this?","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":2288,"Q_Id":52906106,"Users Score":3,"Answer":"There are a few ways to do this, it depends on how fast you need it to archive the files.\nIf the frequency is low, for example every hour, you can try to use windows task scheduler to run the python script.\nIf we are talking high frequency, or you really want a python script running 24\/7, you could put it in a while loop and at the end of the loop do time.sleep()\nIf you go with this, I would recommend not blindly parsing the entire directory on every run, but instead finding a way to check whether new files have been added to the directory (such as the amount of files perhaps, or the total size). And then if there is a fluctuation you can archive.","Q_Score":2,"Tags":"python,python-3.x","A_Id":52906144,"CreationDate":"2018-10-20T13:20:00.000","Title":"Python - How to run script continuously to look for files in Windows directory","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I install my python modules via pip for my Azure Web Apps. But some of python libraries that I need are only available in conda. I have been trying to install anaconda on Azure Web Apps (windows\/linux), no success so far. Any suggestions\/examples on how to use conda env on azure web apps?","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":923,"Q_Id":52915651,"Users Score":1,"Answer":"Currently, Azure App Service only supports the official Python to be installed as extensions. Instead of using the normal App Service, I would suggest you to use a Webapp for Container so that you can deploy your web app as a docker container. I suppose this is the only solution until Microsoft supports Anaconda on App Service.","Q_Score":1,"Tags":"python,azure,anaconda,virtualenv,azure-web-app-service","A_Id":53827502,"CreationDate":"2018-10-21T13:11:00.000","Title":"Anaconda Installation on Azure Web App Services","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Traceback (most recent call last):\n  File \"\/usr\/bin\/xattr-2.7\", line 7, in <module>\n    from pkg_resources import load_entry_point\nImportError: No module named pkg_resources\nMy PYTHONPATH contains \/usr\/local\/lib\/python3.7\/site-packages, the site-packages folder indeed contains the pkg_resources folder. I tried everything and have spent hours searching stack overflow. I even reinstalled python and setuptools, but nothing seems to work.\nThe command I am using to install Java - brew cask install java","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":181,"Q_Id":52920484,"Users Score":0,"Answer":"I guess I was so lost trying to install it with brew, that I forgot that I could download the dmg file from the Oracle website and install it. I still can't figure out the issue with pkg_resources though.","Q_Score":0,"Tags":"python,homebrew,homebrew-cask","A_Id":52921018,"CreationDate":"2018-10-21T22:30:00.000","Title":"pkg_resources not found while installing java on Mac","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I am trying to connect MongoDB from Atlas.\nMy mongo uri is: mongodb+srv:\/\/abc:123@something.something.com\/admin?retryWrites=True\nMy pymongo version is 3.6.1\nI have installed dnspython and done import dns\nBut i still get this error:\n\ndnspython module must be installed to use mongodb+srv:\/\/ URI","AnswerCount":10,"Available Count":5,"Score":1.0,"is_accepted":false,"ViewCount":69143,"Q_Id":52930341,"Users Score":19,"Answer":"I solved this problem with:\n$ python -m pip install pymongo[srv]","Q_Score":70,"Tags":"python,mongodb,pymongo","A_Id":57184519,"CreationDate":"2018-10-22T13:15:00.000","Title":"pymongo - \"dnspython\" module must be installed to use mongodb+srv:\/\/ URIs","Data Science and Machine Learning":0,"Database and SQL":1,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I am trying to connect MongoDB from Atlas.\nMy mongo uri is: mongodb+srv:\/\/abc:123@something.something.com\/admin?retryWrites=True\nMy pymongo version is 3.6.1\nI have installed dnspython and done import dns\nBut i still get this error:\n\ndnspython module must be installed to use mongodb+srv:\/\/ URI","AnswerCount":10,"Available Count":5,"Score":0.0798297691,"is_accepted":false,"ViewCount":69143,"Q_Id":52930341,"Users Score":4,"Answer":"you can use mongo:\/\/ instead of mongodb+srv:\/\/","Q_Score":70,"Tags":"python,mongodb,pymongo","A_Id":58155698,"CreationDate":"2018-10-22T13:15:00.000","Title":"pymongo - \"dnspython\" module must be installed to use mongodb+srv:\/\/ URIs","Data Science and Machine Learning":0,"Database and SQL":1,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I am trying to connect MongoDB from Atlas.\nMy mongo uri is: mongodb+srv:\/\/abc:123@something.something.com\/admin?retryWrites=True\nMy pymongo version is 3.6.1\nI have installed dnspython and done import dns\nBut i still get this error:\n\ndnspython module must be installed to use mongodb+srv:\/\/ URI","AnswerCount":10,"Available Count":5,"Score":1.0,"is_accepted":false,"ViewCount":69143,"Q_Id":52930341,"Users Score":10,"Answer":"I got stuck with the same problem and tried\npip install dnspython==2.0.0\nThis is the latest version from https:\/\/pypi.org\/project\/dnspython\/\nIt worked :D","Q_Score":70,"Tags":"python,mongodb,pymongo","A_Id":63568124,"CreationDate":"2018-10-22T13:15:00.000","Title":"pymongo - \"dnspython\" module must be installed to use mongodb+srv:\/\/ URIs","Data Science and Machine Learning":0,"Database and SQL":1,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I am trying to connect MongoDB from Atlas.\nMy mongo uri is: mongodb+srv:\/\/abc:123@something.something.com\/admin?retryWrites=True\nMy pymongo version is 3.6.1\nI have installed dnspython and done import dns\nBut i still get this error:\n\ndnspython module must be installed to use mongodb+srv:\/\/ URI","AnswerCount":10,"Available Count":5,"Score":0.0,"is_accepted":false,"ViewCount":69143,"Q_Id":52930341,"Users Score":0,"Answer":"May be the protocol, your URI should start with:\nmongo+srv instead of mongo+src\nIf it still not working please put a pip list with the versions of PyMongo and dnspython (and version of python that you are using)","Q_Score":70,"Tags":"python,mongodb,pymongo","A_Id":53311044,"CreationDate":"2018-10-22T13:15:00.000","Title":"pymongo - \"dnspython\" module must be installed to use mongodb+srv:\/\/ URIs","Data Science and Machine Learning":0,"Database and SQL":1,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I am trying to connect MongoDB from Atlas.\nMy mongo uri is: mongodb+srv:\/\/abc:123@something.something.com\/admin?retryWrites=True\nMy pymongo version is 3.6.1\nI have installed dnspython and done import dns\nBut i still get this error:\n\ndnspython module must be installed to use mongodb+srv:\/\/ URI","AnswerCount":10,"Available Count":5,"Score":1.0,"is_accepted":false,"ViewCount":69143,"Q_Id":52930341,"Users Score":18,"Answer":"I would like to answer my own questions here. As I mentioned in the comment, the kernel of the jupyter notebook has to be restarted in order for the pymongo to take effect of the loaded dnspython.","Q_Score":70,"Tags":"python,mongodb,pymongo","A_Id":53644925,"CreationDate":"2018-10-22T13:15:00.000","Title":"pymongo - \"dnspython\" module must be installed to use mongodb+srv:\/\/ URIs","Data Science and Machine Learning":0,"Database and SQL":1,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"On my ubuntu server, some of the installed python packages are simple pip install some are sudo pip install. Is there any way I can give sudo permission to simple pip install?\nNote: There is around 250+ package. Installing one by one is quite hectic.\nPlease help.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":38,"Q_Id":52949781,"Users Score":2,"Answer":"Create requirements.txt file through cmd: pip freeze > requirements.txt\nit'll list all the python installed packages in you're system to that file. once you got the all packages install using either sudo or normal pip.\n\nwith sudo: sudo pip install -r requirements.txt\nwith out sudo : pip install -r requirements.txt\n\ni hope this will help you.","Q_Score":0,"Tags":"python,ubuntu,sudo","A_Id":52950188,"CreationDate":"2018-10-23T13:01:00.000","Title":"Give sudo permission to all simple pip installed packages","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm running into an issue without volume mounting, combined with the creation of directories in python. \nEssentially inside my container, I'm writing to some path \/opt\/\u2026, and I may have to make the path (which I'm using os.makedirs for)\nIf I mount a host file path like -v \/opt:\/opt, with bad \"permissions\" where the docker container does not seem to be able to write to, the creation of the path inside the container DOES NOT FAIL. The makedirs(P) works, because inside the container, it can make the dir just fine, because it has sudo permissions.  However, nothing gets written, silently, on the host at \/opt\/\u2026. The data just isn't there, but no exception is ever raised.\nIf I mount a path with proper\/open permissions, like -v \/tmp:\/opt, then the data shows up on the host machine at \/tmp\/\u2026 as expected.\nSo, how do I not silently fail if there are no write permissions on the host on the left side of the -v argument?\\\nEDIT: my question is \"how do I detect this bad deployment scenario, crash, and fail fast inside the container, if the person who deploys the container, does it wrong\"? Just silently not writing data isn't acceptable.","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":82,"Q_Id":52952692,"Users Score":0,"Answer":"The bad mount is root on the host right, and the good mount is the user in the Docker group on the host? Can you check the user\/group of the mounted \/opt? It should be different than that of \/tmp.","Q_Score":1,"Tags":"python,docker","A_Id":52952936,"CreationDate":"2018-10-23T15:25:00.000","Title":"python+docker: docker volume mounting with bad perms, data silently missing","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a long-running python script script.py.\nWill it cause any issues if I invoke that script one-after the another through terminal:\npython script.py  -----first invocation\npython script.py  -----second invocation before the first gets over.\nSince python is a interpreted language, will there be any interference between these two scripts?\nOr is it safer to make a copy of the script and then run it?","AnswerCount":2,"Available Count":2,"Score":0.1973753202,"is_accepted":false,"ViewCount":110,"Q_Id":52953892,"Users Score":2,"Answer":"There is no danger from the source code; each invocation will read the file separately, allocate its own local variables, etc.  However, there may be interference if the script uses any external references, such as writing to a common file.","Q_Score":1,"Tags":"python,multiprocessing","A_Id":52953957,"CreationDate":"2018-10-23T16:33:00.000","Title":"Python: Is it safe to run a single python script by multiple interpreters?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a long-running python script script.py.\nWill it cause any issues if I invoke that script one-after the another through terminal:\npython script.py  -----first invocation\npython script.py  -----second invocation before the first gets over.\nSince python is a interpreted language, will there be any interference between these two scripts?\nOr is it safer to make a copy of the script and then run it?","AnswerCount":2,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":110,"Q_Id":52953892,"Users Score":2,"Answer":"That depends entirely on what the script does.\nIn the simplest sense, the answer is no - though the two invocations run the same code, they don't inherently share any state and they can run side by side.  Just like any program on your computer, ( for example, bash shell in separate terminals ), independent invocations have their own process space.\nThe only case your scripts might interfere with each other is if they both use shared resources.  For example, if script.py created a file called \/tmp\/state.py then obviously the two invocations would conflict.","Q_Score":1,"Tags":"python,multiprocessing","A_Id":52953965,"CreationDate":"2018-10-23T16:33:00.000","Title":"Python: Is it safe to run a single python script by multiple interpreters?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Can you change the file metadata on a cloud database using Apache Beam? From what I understand, Beam is used to set up dataflow pipelines for Google Dataflow. But is it possible to use Beam to change the metadata if you have the necessary changes in a CSV file without setting up and running an entire new pipeline? If it is possible, how do you do it?","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":294,"Q_Id":52978251,"Users Score":0,"Answer":"You could code Cloud Dataflow to handle this but I would not. A simple GCE instance would be easier to develop and run the job. An even better choice might be UDF (see below).\nThere are some guidelines for when Cloud Dataflow is appropriate:\n\nYour data is not tabular and you can not use SQL to do the analysis.\nLarge portions of the job are parallel -- in other words, you can process different subsets of the data on different machines.\nYour logic involves custom functions, iterations, etc...\nThe distribution of the work varies across your data subsets.\n\nSince your task involves modifying a database, I am assuming a SQL database, it would be much easier and faster to write a UDF to process and modify the database.","Q_Score":1,"Tags":"java,python,google-cloud-platform,apache-beam,database-metadata","A_Id":52980803,"CreationDate":"2018-10-24T21:37:00.000","Title":"Change file metadata using Apache Beam on a cloud database?","Data Science and Machine Learning":0,"Database and SQL":1,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I want to check if root user exist in AWS account using Python or any cli command.\nThanks","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":724,"Q_Id":52994223,"Users Score":0,"Answer":"Try these commands\naws iam list-users\naws iam list-roles","Q_Score":0,"Tags":"python","A_Id":52994379,"CreationDate":"2018-10-25T16:37:00.000","Title":"Check if Root user exist in AWS account","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"In PyCharm, I have 2 methods to run my code:\n\npress ctrl + alt + F10, then the code will run in running console. \ngo to embedded terminal, run the code by .\/filename.py.\n\nWhich method should I use? Or is there a better method? I tried method 1, but problem is some features are missing, like press up arrow for history command, or when use pdb.set_trace() to enter debug mode, the auto-complete feature in running console behaves strangely: for example, in debug mode of running console, when entering a [], the cursor automatically jumps out of the square brackets and do not allow me to type anything in the square brackets. However, there must be a reason why running console exists, right? Otherwise there should only be the embedded terminal.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":925,"Q_Id":53005137,"Users Score":2,"Answer":"The better method is to set the \"Emulate terminal in output console\" option in the settings of the run configuration. You can go to Run | Edit Configurations | Templates and enable the option there so that it will be enabled for all run configurations.\nThis gives you the higher level of integration of the running console (so that you can run your code using Ctrl-Alt-F10 and not by typing the filename in the terminal) and all features of the terminal emulator. This mode is likely to become default in future versions of PyCharm.","Q_Score":1,"Tags":"python,pycharm","A_Id":53005630,"CreationDate":"2018-10-26T09:01:00.000","Title":"In PyCharm, should I use embedded terminal or running console?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I installed pytube via pip, uninstalled it and reinstalled it couple off times, but always I'm getting an error \"ModuleNotFoundError: No module named 'pytube'\".\nWhen I insatlled it via cmd this is what it outputs(warning)\nThe script pytube.exe is installed in 'C:\\Users\\vid\\AppData\\Roaming\\Python\\Python37\\Scripts' which is not on PATH.\nConsider adding this directory to PATH or, if you prefer to suppress this warning, use --no-warn-script-location.\ntrying to fix the problem for like 2 hours now. Help","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":2085,"Q_Id":53015671,"Users Score":0,"Answer":"I repaired that using:\npip install pytube3, which adds the newer pytube version which python supports.","Q_Score":0,"Tags":"python,pytube","A_Id":63538378,"CreationDate":"2018-10-26T20:09:00.000","Title":"Pytube module not found","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I installed pytube via pip, uninstalled it and reinstalled it couple off times, but always I'm getting an error \"ModuleNotFoundError: No module named 'pytube'\".\nWhen I insatlled it via cmd this is what it outputs(warning)\nThe script pytube.exe is installed in 'C:\\Users\\vid\\AppData\\Roaming\\Python\\Python37\\Scripts' which is not on PATH.\nConsider adding this directory to PATH or, if you prefer to suppress this warning, use --no-warn-script-location.\ntrying to fix the problem for like 2 hours now. Help","AnswerCount":2,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":2085,"Q_Id":53015671,"Users Score":1,"Answer":"Run cmd as -> Right click, Run as Administrator and try again\nYou may have 2 different Python installed, one from anaconda and one independent. Uninstall one and keep the conda one only\nReinstall, but run the installer as Administrator\nUpdate pip \"pip install --upgrade pip\"","Q_Score":0,"Tags":"python,pytube","A_Id":53016382,"CreationDate":"2018-10-26T20:09:00.000","Title":"Pytube module not found","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"[WinError 2] The system cannot find the file specified\n  [cmd: ['\/usr\/local\/bin\/python3.7', '-u', '']]\n  [dir: C:\\Program Files\\Sublime Text 3]    [path:C:\\cygwin64\\bin;\"C:\\Windows\\system32;C:\\Windows;C:\\Windows\\System32\\Wbem;C:\\Windows\\System32\\WindowsPowerShell\\v1.0\\%PYTHON_HOME%\";C:\\Users\\Jugal\\AppData\\Local\\Microsoft\\WindowsApps;]","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":62,"Q_Id":53018964,"Users Score":0,"Answer":"Your Sublime Text 3 install expects the cmd to be a string not an array of strings.\nThe array ['\/usr\/local\/bin\/python3.7', '-u', ''] was interpreted as a single entry.\nIt is possible that you need some flags like shell=False to get rid of this behavior.","Q_Score":1,"Tags":"python-3.x","A_Id":53019665,"CreationDate":"2018-10-27T05:23:00.000","Title":"Getting the following error while executing a python program","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I created a simple python script to change my ubuntu wallpaper. I want to this script run after whenever I logged in.\n\nI tried to add command in startup application as python \/bin\/wallpaper_changer.py but it doesn't work.\nI also tried to add a desktop entry in ~\/.config\/autostart\/Myscript.desktop but it also doesn't work.\nI also added this file path in crontab using sudo crontab -e @reboot python \/bin\/wallpaper_changer.py it also doesn't work.\nI added entry in rc.local as python \/bin\/wallpaper_changer.py it also doesn't work","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":902,"Q_Id":53023541,"Users Score":0,"Answer":"I found solution for this.\nfirst make your source file executable.\nchmod +x \/path\/to\/your\/file\nafter add it to cron tab.\nsudo crontab -e\nIf it asks for any editor choose editor options.\nafter it add your path when # symbols end.\n@reboot \/path\/to\/your\/file","Q_Score":0,"Tags":"python,ubuntu,startupscript","A_Id":53042771,"CreationDate":"2018-10-27T15:39:00.000","Title":"Ubuntu - How to run python script after logging in?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I wrote this script that runs several executable updates in a shared network folder. Several separate machines must run these updates.\nI would like to archive these updates once they are run. However, as you may see the dilemma, if the first machine runs an update and archives the executable,\nthe rest of connected devices won't run as they will no longer appear in the cwd. Any ideas?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":64,"Q_Id":53025704,"Users Score":0,"Answer":"It took me a while to understand what you meant by \"archiving\", but probably moving to another folder on a network shared mount. Also, the title should definitely be changed, I accidentally marked it as OK in Review Triage system.\nYou probably want to assign some ID to each machine, then have each of them create a new file once they finish the installation (e.g. empty finished1.txt for PC with ID 1, finished2.txt for PC 2 etc.). Then, one \"master\" PC should periodically scan for such files, and when finding all it expects, deleting\/moving\/archiving the installers. It may be good idea to add timeout functionality to the script on master PC, so when one of PCs will get stuck, you will get notified in some way.","Q_Score":0,"Tags":"python-3.x","A_Id":53026771,"CreationDate":"2018-10-27T19:48:00.000","Title":"Archiving files with Python","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I can not interrupt a running script in python3 kernel in Jupyter, Qt Console, spyder on my window 10 desktop. Ctrl+c and interrupt bottom from the menu do not work, just nothing happens. The same method works well on my laptop and Ubuntu desktop. I tried to reinstall uninstall Anaconda and delete the remaining files, then I tried reinstalling the new version of Anaconda. The problem still here. My window 10 on the desktop is just installed yesterday, so it is fresh. \nI have one desktop and one laptop. Each one has window 10 and Ubuntu installed on it. My laptop windows 10 has no problem to interrupt. Interruption works fine in Ubuntu on both desktop and laptop.\nRight now, my situation is:\nWin 10 desktop: Interruption does not work.\nUbuntu desktop: Interruption works.\nWin 10 laptop: Interruption works.\nUbuntu laptop: Interruption works.\nMy question is:\n\nHow can I fix this? Reinstallation not helping!\nWhat is wrong (probably)? \n\nThanks you! I need to fix to do my physics assignment. My laptop are too bad and I am not familiar with Ubuntu.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":873,"Q_Id":53026544,"Users Score":1,"Answer":"Python 3.6 can key interrupt for me. But I have a solution for Python 3.7.\n\nuninstall Anaconda\nafter that delete those files in C:\\Users\\<your_user_name>:\n.anaconda .conda .ipython .jupyter .matplotplot .spyder-py3\nThis is very important step.\nreinstall Anaconda.\n\nIt works for me.","Q_Score":0,"Tags":"python,windows,kernel,anaconda,spyder","A_Id":56819732,"CreationDate":"2018-10-27T21:45:00.000","Title":"Anaconda python kernel can not be interrupted. Reinstalling can not work","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I apologize in advance because of my basic question, I googled it but I can not understand. I have a simple client server program in python, the server send a command to the client and receive the result from it. \nMy teacher asked me to make a .cfg file for it, my question is why should I do this? I mean what is the benefit of creating a .cfg file? I should run my program in cmd or in an IDE anyway, right?","AnswerCount":2,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":249,"Q_Id":53034065,"Users Score":1,"Answer":"A server listens in a certain IP and port. A client connects to an IP and port. Any other settings you can think of about some program configuration will do.\nWhat if you want to change those without touching the code. Maybe a user of your program wants to change the configuration and doesn't even know how to code. I bet the user knows how to edit a text file of settings.","Q_Score":0,"Tags":"python,client-server,configuration-files","A_Id":53034121,"CreationDate":"2018-10-28T17:08:00.000","Title":"Why have a .cfg file for a program?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I apologize in advance because of my basic question, I googled it but I can not understand. I have a simple client server program in python, the server send a command to the client and receive the result from it. \nMy teacher asked me to make a .cfg file for it, my question is why should I do this? I mean what is the benefit of creating a .cfg file? I should run my program in cmd or in an IDE anyway, right?","AnswerCount":2,"Available Count":2,"Score":0.0996679946,"is_accepted":false,"ViewCount":249,"Q_Id":53034065,"Users Score":1,"Answer":"Your teacher just wants you to decouple the configuration from actual code. That might not make sense to you in scope of your current task. But it makes a lot of sense in a \"real\" project.\nYou maybe want to publish your code to github or something similar in your company in order to share your code or to collaborate, but your code might need some private credentials, which you don't want to share (e.g. passwords) or you have some site specific configuration. So you gonna use seperate configuration files to include this data, in that case you only need to change a configuration in order to get the code working in your context, without having to edit anything in the source code intself.","Q_Score":0,"Tags":"python,client-server,configuration-files","A_Id":53034157,"CreationDate":"2018-10-28T17:08:00.000","Title":"Why have a .cfg file for a program?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a python program which I have made work in both Python 2 and 3, and it has more functionality in Python 3 (using new Python 3 features).\nMy script currently starts #!\/usr\/bin\/env python, as that seems to be the mostly likely name for a python executable. However, what I'd like to do is \"if python3 exists, use that, if not use python\".\nI would prefer not to have to distribute multiple files \/ and extra script (at present my program is a single distributed python file).\nIs there an easy way to run the current script in python3, if it exists?","AnswerCount":3,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":65,"Q_Id":53066830,"Users Score":0,"Answer":"Try with version_info from sys package","Q_Score":0,"Tags":"python,python-3.x","A_Id":53067159,"CreationDate":"2018-10-30T14:41:00.000","Title":"Execute current Python script in Python 3","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have an account on Gator.\nI am trying to run a php script as follows\n;$command = escapeshellcmd('.\/simple.py 2>&1');\n$output = shell_exec($command);\necho $output\nI would like to get as output anything that the python script prints to screen,  but the output is empty no matter what I try (I use standard print in python","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":498,"Q_Id":53068529,"Users Score":0,"Answer":"$command = escapeshellcmd('.\/simple.py 2>&1');\n\nescapeshellcmd is a form of surrender, it's php stupidity, it gets used as a DWIM band-aid when the programmer has lost control of the command-line.\nIt's breaking your stderr redirection.\nUse escapeshellarg where you need to escape shell stuff.\n$command = escapeshellarg('.\/simple.py') . ' ' . '2>&1';","Q_Score":0,"Tags":"php,python","A_Id":53071635,"CreationDate":"2018-10-30T16:10:00.000","Title":"How to call python from php on a remote server","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"So I am running python 3.6.5 on a school computer the most things are heavily restricted to do on a school computer and i can only use python on drive D. I cannot use batch either. I had python 2.7 on it last year until i deleted all the files and installed python 3.6.5 after that i couldn't double click on a .py file to open it as it said continue using E:\\Python27\\python(2.7).exe I had the old python of a USB which is why it asks this but know i would like to change that path the the new python file so how would i do that in windows","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":39,"Q_Id":53098459,"Users Score":0,"Answer":"Just open your Python IDE and open the file manually.","Q_Score":0,"Tags":"python,windows,directory","A_Id":53098745,"CreationDate":"2018-11-01T09:31:00.000","Title":"Running a python file in windows after removing old python files","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a java build that uses python to handle some of the configuration. I have build agents on both windows and linux. On windows I have place python 3 in my path so that i can issue python commands as part of my build.\nWhen the agent is running on linux it is picking up python2 instead of python3. \nHow do I default the teamcity agent to python 3","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":1752,"Q_Id":53103507,"Users Score":0,"Answer":"Can't you just do the same thing as on Windows? I.e. to place python3 in $PATH.\nUpdate:\nOne option is to update Linux machine environment, so it will have python pointing to python3. If it is not possible, or you want it to be in effect only for TC, you can overwrite PATH in Teamcity at a project level or at a build configuration level.\nIn the beginning of PATH put a path that contains python link pointing to python3.\nPS. When specifying environment variable in TC don't use constructions like path:$PATH since $PATH will not be expanded.","Q_Score":0,"Tags":"python,linux,ubuntu,teamcity","A_Id":53155295,"CreationDate":"2018-11-01T14:38:00.000","Title":"Teamcity agent default python","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a USB with a python installation that I carry around with me & use on computers that don't have python installed\/don't allow you to install modules. I'd like to install a python package onto it but have been having trouble. Let me use the package rebound-clifor example.\nIf I pip install rebound-cli, the package is installed onto my PC installation of python D:\\Program Files (x86)\\Python36-32.\nThe directory of my USB python installation is H:\\.bin\\Program Files\\Python.\nI've tried the following\n\npip install rebound-cli -e \"H:\\.bin\\Program Files\\Python\\Lib\\site-packages\"\npip install rebound-cli -e \"H:\\.bin\\Program Files\\Python\"\n\nThey both give me the error(s)\nDirectory 'H:\\\\.bin\\\\Program Files\\\\Python\\\\Lib\\\\site-packages' is not installable. File 'setup.py' not found.\nDirectory 'H:\\\\.bin\\\\Program Files\\\\Python' is not installable. File 'setup.py' not found.\nI've also tried \n\"H:\\.bin\\Program Files\\Python\\Scripts\\pip.exe\" install rebound-cli\nBut have received the error\nFatal error in launcher: Unable to create process using '\"e:\\.bin\\program files\\python\\python.exe\"  \"H:\\.bin\\Program Files\\Python\\Scripts\\pip.exe\" install rebound-cli'","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":3057,"Q_Id":53103727,"Users Score":0,"Answer":"The package is installed on your PC because you did not explicitly specify which pip binary to use.\nIf you execute where pip, it would display the directory of the pip binary which is currently active. In your case, it will most likely be in D: directory.\nTo install packages in your USB, use h:\\<path>\\<to>\\<pip>\\pip install rebound-cli.\nA better option would be, creating a virtual environment in your USB and activating that environment whenever you want to use Python in your USB. Using an environment will save you from the need to explicitly specify the path to pip\/python binary located in your USB","Q_Score":1,"Tags":"python,python-3.x,windows,pip","A_Id":53103892,"CreationDate":"2018-11-01T14:51:00.000","Title":"How to pip install to an external drive?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Hi my name is Oscar and I would like some help!\nSo the scenario I have is that I am trying to write a python code that will copy itself and put that copy in another directory. I know that you can use the shutil command. For example:\nimport shutil\nshutil.copy(\"C:\\Users\\%user%\\Downloads\\file.txt\", \"C:\\Users\\%user%\\Documents\")\nBut I want to just copy the file so that the script works on any computer that it is located on, for example:\nimport shutil\nshutil.copy(\"file.txt\", \"C:\\Users\\%user%\\Documents\")\nIf you don't understand what I mean please ask and I can try to elaborate.\nSincerely, Oscar :)\nEDIT: I am super dumb it seems like, I did not know that you had to type the destination folder with to backslashes sometimes to actually make it a path. All solved, sorry for wasting everyone's time.","AnswerCount":3,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":257,"Q_Id":53109247,"Users Score":0,"Answer":"I am super dumb it seems like, I did not know that you had to type the destination folder with to backslashes sometimes to actually make it a path. All solved, sorry for wasting everyone's time.","Q_Score":0,"Tags":"python,directory,copy","A_Id":53111975,"CreationDate":"2018-11-01T20:56:00.000","Title":"PYTHON | Copying a file from an unknown destination","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Hi my name is Oscar and I would like some help!\nSo the scenario I have is that I am trying to write a python code that will copy itself and put that copy in another directory. I know that you can use the shutil command. For example:\nimport shutil\nshutil.copy(\"C:\\Users\\%user%\\Downloads\\file.txt\", \"C:\\Users\\%user%\\Documents\")\nBut I want to just copy the file so that the script works on any computer that it is located on, for example:\nimport shutil\nshutil.copy(\"file.txt\", \"C:\\Users\\%user%\\Documents\")\nIf you don't understand what I mean please ask and I can try to elaborate.\nSincerely, Oscar :)\nEDIT: I am super dumb it seems like, I did not know that you had to type the destination folder with to backslashes sometimes to actually make it a path. All solved, sorry for wasting everyone's time.","AnswerCount":3,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":257,"Q_Id":53109247,"Users Score":0,"Answer":"You could use pythons standard \"os\" library to make OS independent filepaths. Then you use the special \"file\" variable available inside any executed script to get the location of the executed script, to copy itself to some target location. Good luck!","Q_Score":0,"Tags":"python,directory,copy","A_Id":53109365,"CreationDate":"2018-11-01T20:56:00.000","Title":"PYTHON | Copying a file from an unknown destination","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm trying to repeatedly execute a curl command with a python script, is there a better way to do such a task?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":201,"Q_Id":53118542,"Users Score":2,"Answer":"Below findings can help you in  linux environment.\nYou can do that with the help of a cron jab. \nSteps to setup a cron job:\n\nOpen crontab by the command \"crontab -e\" on the shell\nPaste the following in the file and correct the path\n0 * * * * \/home\/sshashank\/script.py\nMake sure you have given proper permissions to the folders where python script is going to run, folder where it is going to access(files\/logs). \nPlease provide absolute path and not relative path.","Q_Score":0,"Tags":"python,swagger-ui","A_Id":53118698,"CreationDate":"2018-11-02T12:21:00.000","Title":"How: Python Script to execute Terminal Command every hour?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am working on a project for a client in which I need to load a lot of data into data studio. I am having trouble getting the deployment to work with my REST API. \nThe API has been tested with code locally but I need to know how to make it compatible with the code base in App Scripts. Has anyone else had experience with working around this? The endpoint is a Python Flask application. \nAlso, is there a limit on the amount of data that you can dump in a single response to the Data Studio? As a solution to my needs(needing to be able to load data for 300+ accounts) I have created a program that caches the data needed from each account and returns the whole payload at once. There are a lot of entries, so I was wondering if they had a limit to what can be uploaded at once. \nThank you in advance","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":146,"Q_Id":53128705,"Users Score":1,"Answer":"I found the issue, it was a simple case of forgetting to add the url to the whitelist.","Q_Score":0,"Tags":"javascript,python,rest,google-apps-script,google-data-studio","A_Id":53149427,"CreationDate":"2018-11-03T05:34:00.000","Title":"Google Data Studio Connector and App Scripts","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"When I start python3 in terminal, it runs python 3.6.5.\nHowever, when I look in \/usr\/local\/lib, I see python 3.7 and all it's site-packages.\nWhy is there a discrepancy? Shouldn't the version always match when I update? Does this matter?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":21,"Q_Id":53132739,"Users Score":0,"Answer":"The command which python will tell you the path to the executable that is being chosen. Use echo $PATH to see which directories are checked for files to run and in which order - this should help you to understand which file is being chosen and why.","Q_Score":0,"Tags":"python-3.x","A_Id":53132766,"CreationDate":"2018-11-03T15:26:00.000","Title":"Mismatch between python3 version from command line and version in \/usr\/local\/lib","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I know that it is possible to turn python files into .exe files but why would you need to do that? What are the benefits?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":32,"Q_Id":53137109,"Users Score":0,"Answer":"A lot of the time, it has to do with bundling.\nConsider that when you go to distribute a standalone Python program, you often have to assume that whomever the program is intended for already has, at the very least, a Python interpreter of a compatible version installed. Similarly, if your program uses packages or modules which aren't part of the Python standard library, you will also have to make the assumption that the intended users also have your program dependencies installed or are using pip to install it via your listed setup.py dependencies. Typically these are not good assumptions.\nThere are a number of ways of addressing this issue, and bundling a Python interpreter with the necessary dependencies installed into the distribution itself is a popular one. For Windows users in particular, many developers like to release such bundles as .exe files using a C or C++ wrapper for the sake of user convenience: A user need only double click the bundled program to launch it with minimal setup. This is how a lot of \".py to .exe\" conversion programs work, such as the popular py2exe Python package.","Q_Score":0,"Tags":"python-3.x","A_Id":53137226,"CreationDate":"2018-11-04T01:55:00.000","Title":"Why would you need to turn a python file into an executable?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I want to run a program on our cluster environment which requires python 2.7. The thing is the version installed on the cluster is 2.6.6. Therefore, I tried to update the python version in my own folder. To do so, first I used module avail python command, but nothing showed up!!! Afterward, I tried which python2.7 on the command line, and I noticed that it exist in \/usr\/bin\/python2.7. Going into the given subfolder, I tried module load python2.7 but I faced the following error:\nModuleCmd_Load.c(208):ERROR:105: Unable to locate a modulefile for 'python2.7'\nI would be very thankful if someone could tell me how can I solve my problem.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":277,"Q_Id":53173713,"Users Score":0,"Answer":"The module command you use needs to find a modulefile for the module python2.7 you try to load. If such modulefile is found it usually updates the shell environment to active the software in question.\nIn the situation you describe, it seems there is no python module available by default currently. Which means you either:\n\nneed to find the modulepath to activate with the module use command where those python modulefiles are located\nor write a modulefile to enable this python2.7 installation and save it in an existig modulepath directory","Q_Score":0,"Tags":"python-2.7,cluster-computing,python-2.6,updating,environment-modules","A_Id":53185454,"CreationDate":"2018-11-06T14:16:00.000","Title":"Updating Python in my folder on the cluster","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I just recently upgraded to Python 3.7.0 on my Mac via a Homebrew installation.  Unfortunately this process resulted in my prior 3.6.5 installation being removed and as a result Pycharm no longer links to the interpreter.  I went into the Pycharm menu in the following fashion Pycharm >> Preferences >> Project Interpreter and tried to add the new path link to the 3.7.0 installation, which was at Users\/myname\/usr\/local\/Cellar\/python3\/3.7.0\/bin\/python3.7 and I get a message Environment location directory is not empty which indicates I am not linking to the proper item, but if this is not it I am not sure where I should be linking to.  Can anyone point me in the right direction?","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":2696,"Q_Id":53193173,"Users Score":1,"Answer":"It sounds like you're trying to add the 3.7 installation as a virtual environment, rather than a \"system\" installation of Python. Try this:\n\nOpen the Project Interpreter settings (Cmd+A, search for Project Interpreter)\nClick the settings \"gear\" icon next to the Project Interpreter dropdown\nClick Add\nIn the left-hand sidebar of the \"Add Python Interpreter\" dialog that appears, click \"System Interpreter\" (rather than the default of \"Virtualenv Environment\").\nUse the \". . .\" button to locate your installation.","Q_Score":0,"Tags":"pycharm,python-3.7","A_Id":53325661,"CreationDate":"2018-11-07T15:59:00.000","Title":"How to link the Python 3.7.0 interpreter to Pycharm on Mac","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to run BUSCO using a FASTA file using my mac commandline. Unfortunately when doing so I receive the following message:\n$ busco -i \/Volumes\/WORK\/research_project\/pseudomonas_putida\/ncbi-genomes-2018-10-24\/GCA_000007565.2_ASM756v2_genomic.fna -o \/users\/williamimart\/Desktop\/test -l \/\/Volumes\/WORK\/research_project\/busco_datasets\/gammaproteobacteria_odb9 -m geno\nMaximum number of regions limited to: 3\nTraceback (most recent call last):\n  File \"\/Users\/williamimart\/miniconda2\/bin\/busco\", line 204, in \n    if mode == 'genome' and os.access(os.environ.get('AUGUSTUS_CONFIG_PATH'),os.W_OK) == False:\nTypeError: coercing to Unicode: need string or buffer, NoneType found\nWhat can I do to go around this problem?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":79,"Q_Id":53195972,"Users Score":0,"Answer":"I'm guessing you'll need to export the AUGUSTUS_CONFIG_PATH. The os.environ.get() is a place that could return None if you don't have that variable configured\nThe default value for that is not something clear to me as I don't have experience with this library, but the way to add that would be to run\nexport AUGUSTUS_CONFIG_PATH=\/some\/path\/to\/conf\nCheck their docs for what to set that path value to","Q_Score":0,"Tags":"python,string","A_Id":53198719,"CreationDate":"2018-11-07T18:54:00.000","Title":"How do I bypass \"TypeError: coercing to Unicode: need string or buffer, NoneType\" message on Python on the mac terminal (BUSCO)","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to build a Thrift proxy, with Apache Thrift, to filter some requests directed to a Thrift server.\nThe flow should be like Thrift Client <-> Proxy <-> Thrift Server for all RPC calls.\nBasically the Thrift server binds to some services that expose some callable methods. I want to develop a proxy which is able to filter any requests: the client is allowed to call only some methods on some services so I want to discard any request which is not allowed.\nI can't modify the Thrift Server code that's why I need a proxy.\nIs there any solution or Thrift class which would be good in this case?\nRight now I am using python.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":357,"Q_Id":53202066,"Users Score":0,"Answer":"Nothing specific in trunk to do this, however you could easily write a quick service implementation using the same IDL the real server uses. Your service could them filter client calls as needed and call through to the real server when appropriate. Your service would thus be a server to the client and a client to the real server. It would probably be good to throw a TApplicationException back to the client for calls you want to reject.","Q_Score":1,"Tags":"python,proxy,rpc,thrift,thrift-protocol","A_Id":53714191,"CreationDate":"2018-11-08T05:35:00.000","Title":"Apache Thrift proxy for filtering requests","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I am working on a project using AWS ECS. I want to use Celery as a distributed task queue. Celery Worker can be build up as EC2 type, but because of the large amount of time that the instance is in the idle state, I think it would be cost-effective for AWS Fargate to run the job and quit immediately.\nDo you have suggestions on how to use the Celery Worker efficiently in the AWS cloud?","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":5029,"Q_Id":53218715,"Users Score":6,"Answer":"Fargate launch type is going to take longer to spin up than EC2 launch type, because AWS is doing all the \"host things\" for you when you start the task, including the notoriously slow attaching of an ENI, and likely downloading the image from a Docker repo. Right now there's no contest, EC2 launch type is faster every time.\nSo it really depends on the type of work you want the workers to do. You can expect a new Fargate task to take a few minutes to enter a RUNNING state for the aforementioned reasons. EC2 launch, on the other hand, because the ENI is already in place on your host and the image is already downloaded (at best) or mostly downloaded (likely worst), will move from PENDING to RUNNING very quickly.\n\nUse EC2 launch type for steady workloads, use Fargate launch type for burst capacity\nThis is the current prevailing wisdom, often discussed as a cost factor because Fargate can't take advantage of the typical EC2 cost savings mechanisms like reserved instances and spot pricing. It's expensive to run Fargate all the time, compared to EC2.\nTo be clear, it's perfectly fine to run 100% in Fargate (we do), but you have to be willing to accept the downsides of doing that - slower scaling and cost.\nNote you can run both launch types in the same cluster. Clusters are logical anyway, just a way to organize your resources.\n\nExample cluster\nThis example shows a static EC2 launch type service running 4 celery tasks. The number of tasks, specs, instance size and all doesn't really matter, do it up however you like. The important thing is - EC2 launch type service doesn't need to scale; the Fargate launch type service is able to scale from nothing running (during periods where there's little or no work to do) to as many workers as you can handle, based on your scaling rules.\nEC2 launch type Celery service\nRunning 1 EC2 launch type t3.medium (2vcpu\/4GB).\nMin tasks: 2, Desired: 4, Max tasks: 4\nRunning 4 celery tasks at 512\/1024 in this EC2 launch type.\nNo scaling policies\nFargate launch type Celery service\nMin tasks: 0, Desired: (x), Max tasks: 32\nRunning (x) celery tasks (same task def as EC2 launch type) at 512\/1024\nAdd scaling policies to this service","Q_Score":5,"Tags":"python,amazon-web-services,celery,amazon-ecs,aws-fargate","A_Id":53268305,"CreationDate":"2018-11-09T01:48:00.000","Title":"Operating the Celery Worker in the ECS Fargate","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I was wondering if there is a way to run two python scripts at the same time through the command prompt. \nI also am wondering if there is a way to run a second python script after another one has already been executed and is currently running. \nThanks","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":3871,"Q_Id":53219802,"Users Score":7,"Answer":"To execute 2 script at the same time, execute python script1.py & python script2.py\nTo execute one after the other (without waiting for the first one to finish), you could simply open 2 command prompt windows. Execute each script in each window.\nTo execute one after the other (after waiting for the first one to finish successfully), execute python script1.py && python script2.py","Q_Score":1,"Tags":"python","A_Id":53219822,"CreationDate":"2018-11-09T04:16:00.000","Title":"Is there a way to run two python programs in command prompt?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Airflow version 1.8\nPython version 3.6\ni am getting No module named 'MySQLdb' error\nwhen i configure the Airflow with LocalExecutor and Mysql as metadata database.\ni am not able to install the MySQLdb package due to version issue.\nanyone having idea how to solve this issue?\nThanks\nKalanidhi","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":1053,"Q_Id":53225462,"Users Score":0,"Answer":"after configuring airflow.cfg like sql_alchemy_conn = mysql+pymysql:\/\/airflowuser:mysql@localhost:3306\/airflowdb its started working. Actually here i am using pymysql package instead of MySQLdb package(@joeb: - it seems MySQLdb package not supporting python 3+ version)","Q_Score":0,"Tags":"python-3.6,mysql-python,airflow","A_Id":53239536,"CreationDate":"2018-11-09T12:09:00.000","Title":"Apache Airflow + Python 3.6 + Local Executor + Mysql as a metadata database","Data Science and Machine Learning":0,"Database and SQL":1,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a Python application that simulates the behaviour of a system, let's say a car.\nThe application defines a quite large set of variables, some corresponding to real world parameters (the remaining fuel volume, the car speed, etc.) and others related to the simulator internal mechanics which are of no interest to the user.\nEverything works fine, but currently the user can have no interaction with the simulation whatsoever during its execution: she just sets simulation parameters, lauchs the simulation, and waits for its termination.\nI'd like the user (i.e. not the creator of the application) to be able to write Python scripts, outside of the app, that could read\/write the variables associated with the real world parameters (and only these variables).\nFor instance, at t=23s (this condition I know how to check for), I'd like to execute user script gasLeak.py, that reads the remaining fuel value and sets it to half its current value.\nTo sum up, how is it possible, from a Python main app, to execute user-written Python scripts that can access and modifiy only a pre-defined subset of the main script variables. In a perfect world, I'd also like that modifications applied to user scripts during the running of the app to be taken into account without having to restart said app (something along the reloading of a module).","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":21,"Q_Id":53229900,"Users Score":0,"Answer":"Make the user-written scripts read command-line arguments and print to stdout. Then you can call them with the subprocess module with the variables they need to know about as arguments and read their responses with subprocess.check_output.","Q_Score":0,"Tags":"python,namespaces,interpreter","A_Id":53229974,"CreationDate":"2018-11-09T16:42:00.000","Title":"Run external Python script that could only read\/write only a subset of main app variables","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I use wxpython (phoenix) as frontend and wx.lib.pubsub to manage the inter-module (and inter-package) messaging in my program. I currently use the module dill to save and load the program state.\nI only use the sendMessage and the subscribe methods, no fancy tricking here.\nIf I stay in the same session, that is, I build the model and modify it without saving and reloading the model, all works fine.\nHowever, when restarting the GUI and starting a session from a saved file, part of the messaging that worked previously OK, fails: the messages are sent, but the receiver does not get them. \nWhen directly calling the methods that should have been called on the receiver side, all works great, regardless of the session.\nDue to the complexity of the problem I can't really provide an example, but would appreciate any effort for clarification or shared similar experiences.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":13,"Q_Id":53246911,"Users Score":0,"Answer":"To kind of answer my own question: after trying to reproduce the issue in toy problems unsuccesfully followed by lenghty debugging the source of the problem was found to be the way certain properties were set, namely using property.setters. These have been replaced by set_ methods and the issue was resolved.\nI know this question and also the answer are well below the expected SO standard, feel free to downvote.","Q_Score":0,"Tags":"python-3.x,dill,wxpython","A_Id":53283137,"CreationDate":"2018-11-11T08:10:00.000","Title":"wxpython pubsub fails after loading from dill","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I have a Python script I want to run in Azure Resource Manager context within an Azure DevOps pipeline task to be able to access Azure resources (like the Azure CLI or Azure PowerShell tasks).\nHow can I get Azure RM Service Endpoint credentials stored in Azure DevOps passed - as ServicePrincipal\/Secret or OAuth Token - into the script?","AnswerCount":3,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":3349,"Q_Id":53251660,"Users Score":0,"Answer":"Depends on what you call a python script, but either way Azure DevOps hasn't got native support to authenticate python sdk (or your custom python script), but you can pass in credentials from build\\release variables to your script, or try and pull that from the Azure Cli (I think it stores data somewhere under \/home\/.azure\/.","Q_Score":0,"Tags":"python,azure-devops,azure-resource-manager","A_Id":53251791,"CreationDate":"2018-11-11T18:06:00.000","Title":"How can I run a Python script in Azure DevOps with Azure Resource Manager credentials?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have used subprocess to obtain the output from command line, but it requires the process to end before you can use the data. Is there a way to get data line by line as it outputs? I need to have a process running indefinitely while python gets each new line as it is printed out.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":76,"Q_Id":53255747,"Users Score":0,"Answer":"If you know the Process ID or PID, You can do subprocess.call('tail -f \/proc\/<pid>\/fd\/1')","Q_Score":0,"Tags":"python,command-line,output","A_Id":53255981,"CreationDate":"2018-11-12T03:53:00.000","Title":"Reading command line output from ongoing processes in terminal","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have used Python (version 3.6.5 (v3.6.5:f59c0932b4, Mar 28 2018, 16:07:46) [MSC v.1900 32 bit (Intel)] on win32) and pyinstaller (version 3.3.1) to build a standalone executable for only windows OS usage. This executable runs perfectly every time it is called. \nI want this application to be available and usable for future changes and releases of windows. Is it possible\/likely that in future releases that this executable will stop functioning? If so, what exactly would be the cause?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":36,"Q_Id":53266537,"Users Score":0,"Answer":"There's never going to be any firm guarantee that software built for an older operating system continues to work on any conceivable future operating system.  That's analogous to asking \"Can you guarantee that every car everywhere will always support my carburetor?\"  \nThat's demonstrably false, but also patently absurd to ponder.  No one can tell you what will or won't change in future operating systems, or what might introduce a binary incompatibility for a script compiled in the past.","Q_Score":0,"Tags":"python,windows,executable,pyinstaller","A_Id":53267486,"CreationDate":"2018-11-12T16:42:00.000","Title":"Hypothetical scenario: Python standalone executable for future machine compatibility","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I would like to install graph tool on ubuntu. \nTherefore I want to make the default version of python to 3.7 instead of 2.7 because my compiler give me the error, that the python interpreter is to old to run the configure. \nSo do u know an solution?\nThanks a lot","AnswerCount":3,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":4238,"Q_Id":53270725,"Users Score":0,"Answer":"python3 file.py\nOr add #!\/usr\/bin\/python3 to the first line of your code to automatically run it with python 3.","Q_Score":0,"Tags":"python,linux,python-3.x,ubuntu-16.04","A_Id":53280335,"CreationDate":"2018-11-12T21:59:00.000","Title":"Python2.7 to Python3 Ubuntu switch","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I would like to install graph tool on ubuntu. \nTherefore I want to make the default version of python to 3.7 instead of 2.7 because my compiler give me the error, that the python interpreter is to old to run the configure. \nSo do u know an solution?\nThanks a lot","AnswerCount":3,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":4238,"Q_Id":53270725,"Users Score":0,"Answer":"I'll recommend not using aliases nor changing defaults. Those things have a way of coming back to bite you later on. \nBy your description, you said that the tool said the interpreter was too old. I'll guess that it needs a python3 interpreter. So what you should do is a simple sudo apt install python3 and use python3 instead of python when running the code from the terminal.\nExample:\nInstead of python manage.py runserver\nDo... python3 manage.py runserver","Q_Score":0,"Tags":"python,linux,python-3.x,ubuntu-16.04","A_Id":57073945,"CreationDate":"2018-11-12T21:59:00.000","Title":"Python2.7 to Python3 Ubuntu switch","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a hosting plan through Godaddy that only supports python 2.6.6. I have been able to install python 2.7 and 3.6 through SSH and run scripts, pip, no problems.\nWhen I try and run a PHP script that calls a python script from SSH, it works just fine using my new python installs, but when I open the PHP script in a browser, it will only run 2.6.6.\nWhy is this? Is there a way to get around this without getting a VPS?","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":311,"Q_Id":53284175,"Users Score":0,"Answer":"I have found a sneaky way around this. I used SSH2 PHP extension to call the python3.","Q_Score":0,"Tags":"php,python","A_Id":53285381,"CreationDate":"2018-11-13T15:21:00.000","Title":"Python on a shared hosting server","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a windows setup file (.exe), which is used to install a software. This is a third party executable. During installation, it expects certain values and has a UI.\nI want to run this setup .exe silently without any manual intervention (even for providing the parameter values).\nAfter spending some time googling about the approach, I feel powershell should be able to help me with my requirements.\nCan anyone suggest if powershell would be the right tool for this, or does a better tool exists to get this requirement?\nCan python be used to implement this requirement?\nPlease note: Since this is a third party executable, I don't have the names of the parameters for which values must be provided to the UI during installation\nThank you","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":3678,"Q_Id":53289402,"Users Score":0,"Answer":"You can also try creating a shortcut to the exe and adding (one at a time) common help parameters in the shortcut target and see if one gives you a help dialog. Some common parameters are \n\/?\n\/help\n-help\n--help\nThis also depends on the developer implementing a help parameter, but most installer builders default to implementing, so more often than not you will get something. Also, try an internet search for \"SOFTWARE NAME silent install\". Quiet often the developer has some documentation on their web site. But, if it's a really small developer or freeware or the like, you may not find much.","Q_Score":0,"Tags":"python,powershell,windows-installer,installation","A_Id":53290003,"CreationDate":"2018-11-13T20:58:00.000","Title":"Silent run installer (.exe) with parameters on Windows","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Why are there two different docker files for tensorflow serving - Dockerfile & Dockerfile.devel - for both CPU and GPUs?\nWhich one is necessary for deploying and testing?","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":125,"Q_Id":53294415,"Users Score":1,"Answer":"a Dockerfile is a file where your write the configurations to create a docker image. \nThe tensorflow\/serving cpu and gpu are docker images which means they are already configured to work with tensorflow, tensorflow_model_server and, in the case of gpu, with CUDA. \nIf you have a GPU, then you can use a tensorflow\/serving gpu version which would reduce the latency of your predictions. If you don't have a GPU, then you can use a tensorflow\/serving cpu version which would do exactly the same but will be slower.","Q_Score":0,"Tags":"python,docker,tensorflow,dockerfile,tensorflow-serving","A_Id":53308093,"CreationDate":"2018-11-14T06:38:00.000","Title":"What is the difference between tensorflow serving Dockerfile and Dockerfile.devel?","Data Science and Machine Learning":1,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I had been able to run python files via Atom's Open in Browser, but now that I have uninstalled python 2.7 (still have the latest version installed) it throws an error saying I have no program associated with that file type. Any help would be appreciated!","AnswerCount":1,"Available Count":1,"Score":0.3799489623,"is_accepted":false,"ViewCount":57,"Q_Id":53312449,"Users Score":2,"Answer":"Update your system's path variables because python path is pointing to the previous version which you have uninstalled.","Q_Score":0,"Tags":"python,atom-editor","A_Id":53312493,"CreationDate":"2018-11-15T04:29:00.000","Title":"can't run py files from atom after uninstalling old python","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Using pipenv to create a virtual environment in a folder. \nHowever, the environment seems to be in the path:  \n\n\/Users\/......\/.local\/share\/virtualenvs\/......\n\nAnd when I run the command pipenv run python train.py, I get the error:\n\ncan't open file 'train.py': [Errno 2] No such file or directory\n\nHow to run a file in the folder where I created the virtual environment?","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":5743,"Q_Id":53322703,"Users Score":7,"Answer":"You need to be in the same directory of the file you want to run then use:\npipenv run python train.py\nNote:\n\nYou may be at the project main directory while the file you need to run is inside a directory inside your project directory\nIf you use django to create your project, it will create two folders inside each other with the same name so as a best practice change the top directory name to 'yourname-project' then inside the directory 'yourname' run the pipenv run python train.py command","Q_Score":6,"Tags":"python,path,pipenv,virtual-environment","A_Id":53470726,"CreationDate":"2018-11-15T15:28:00.000","Title":"how to use pipenv to run file in current folder","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"In the past, I've been using WebJobs to schedule small recurrent tasks that perform a specific background task, e.g., generating a daily summary of user activities. For each task, I've written a console application in C# that was published as an Azure Webjob.\nNow I'd like to daily execute some Python code that is already working in a Docker container. I think I figured out how to get a container running in Azure. Right now, I want to minimize the operation cost since the container will only run for a duration of 5 minutes. Therefore, I'd like to somehow schedule that my container starts once per day (at 1am) and shuts down after completion. How can I achieve this setup in Azure?","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":534,"Q_Id":53327355,"Users Score":4,"Answer":"I'd probably write a scheduled build job on vsts\\whatever to run at 1am daily to launch a container on Azure Container Instances. Container should shutdown on its own when the program exists (so your program has to do that without help from outside).","Q_Score":0,"Tags":"python,azure,docker,scheduled-tasks","A_Id":53327397,"CreationDate":"2018-11-15T20:22:00.000","Title":"How to run a briefly running Docker container on Azure on a daily basis?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I added the pip installation folder in my python site-packages directory to my PATH, but I can still only run it via python -m pip in my git bash. Just pip gives me command not found.\nI looked around the pip directory and I don't see any binaries, so this makes sense. Yet clearly pip is a thing that is normally used on the command line without python -m. So what component am I missing here?","AnswerCount":2,"Available Count":2,"Score":0.2913126125,"is_accepted":false,"ViewCount":19387,"Q_Id":53346267,"Users Score":3,"Answer":"in your Anaconda directory there is a pip file in the direcctory Scripts.\nadd this path : C:\\Users#yourname\\Anaconda3\\Scripts\ni did the same and it was successful !!\n(when i wrote pip in git bash it worked)","Q_Score":7,"Tags":"python,windows,pip","A_Id":60069204,"CreationDate":"2018-11-16T22:30:00.000","Title":"How to make pip available to git bash command line on Windows?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I added the pip installation folder in my python site-packages directory to my PATH, but I can still only run it via python -m pip in my git bash. Just pip gives me command not found.\nI looked around the pip directory and I don't see any binaries, so this makes sense. Yet clearly pip is a thing that is normally used on the command line without python -m. So what component am I missing here?","AnswerCount":2,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":19387,"Q_Id":53346267,"Users Score":14,"Answer":"Try adding C:\/path\/to\/python\/Scripts\/ to PATH\nThere should be a pip.exe there!","Q_Score":7,"Tags":"python,windows,pip","A_Id":53346494,"CreationDate":"2018-11-16T22:30:00.000","Title":"How to make pip available to git bash command line on Windows?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am developing an application in which I am explicitly using memcache with Google Appengine's NDB library. I want something like this.\n1) Get 100 records from datastore and put them in memcache.\n2) Now whenever user wants these records I would get these records from memcache instead of datastore.\n3) I would invalidate the memcache if there is a new record in datastore and then populate the memcache with 101 records.\nI am thinking of an approach like I compare the number of records in memcache and datastore and if there is a difference, I would update the memcache.\nBut if we see documentation of NDB, we can only get count by retrieving all the records, and this is not required as datastore query is not being avoided in this way.\nAny help anyone? Or any different approach I could go with?\nThanks in advance.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":82,"Q_Id":53350054,"Users Score":0,"Answer":"Rather than relying on counts, you could give each record a creation timestamp, and keep the most recent timestamp in memcache. Then to see if there are new records you just need to check if there are any timestamps newer than that, which assuming you have an index on that field is a very quick query.","Q_Score":0,"Tags":"django,python-2.7,nosql,app-engine-ndb,google-app-engine-python","A_Id":53350546,"CreationDate":"2018-11-17T09:52:00.000","Title":"Best way to count number of records from NDB library","Data Science and Machine Learning":0,"Database and SQL":1,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"In my current directory there is the executable script.py with the shebang #!\/usr\/bin\/env python. To execute it in bash, I need to type .\/script.py. From what I read about shebang I would expect script.py to execute the script too, same as python script.py does, but it doesn't. What is the difference between the two latter options?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":213,"Q_Id":53359402,"Users Score":4,"Answer":"On Un*x-like systems, . is not in the path for security reasons, in order to avoid executing a command like ls which could be in a user directory (this security breach is best exploited as root)\nThis is less concerning for python scripts than for classic commands like ls, but python scripts with a shebang are executables so the obey the general security rules.\nWhen you type python myscript.py you know that the script is in the current directory, and python reads it from here, regardless of the system path (it's seen as data, not as executable, the real executable being python)","Q_Score":2,"Tags":"python,shebang","A_Id":53359421,"CreationDate":"2018-11-18T09:20:00.000","Title":"Why does python script in current directory need .\/ for execution with shebang?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm making API server with python flask.\nIn my case, it is real production level, So I have to be careful when developing server.\nAfter google searching, found that celery&redis is suitable for task queueing.\nSo I installed celery&redis via pip3 install 'celery[redis]' and defined task, and run.\nEverything was fine, but I got some question about it.\nAssume that there is user model. Maybe CRUD for user model like this.\n\nRegister user(with photo)\nDelete user\nGet a single user\n\nIn my personal think, only Register user need to celery&redis.\nBecause upload photo can take long time, so it have to treated with asynchronize work.\nDelete user and Get a slngle user just query to db and retreive it.\nSo it doesn't takes longer time. (it means, do not need to work with celery)\nIt is right? Or, any missing feature I do not know?\nTo summarize my question, I want to know that is there any standard for celery?\nThanks!","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":65,"Q_Id":53369400,"Users Score":0,"Answer":"You have it about right.  You can put whatever processing you want in celery, but the rule that you just used--use celery for things that take a long time--is the one we use most in our production environment.  You can also use celery when you want to scale out an operation across servers more easily.  For example, when scraping a large number of pages, you might want to execute that in parallel to speed up what would otherwise be a long-running task.","Q_Score":0,"Tags":"python,flask,redis,celery","A_Id":53424766,"CreationDate":"2018-11-19T06:31:00.000","Title":"python celery for every work is efficient?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I am seeing following issue:\nIn [5]: img = open_image(\"2018-09-21_005.hdr\")\nIn [6]: view_cube(img, bands=[29, 19, 9])\nModuleNotFoundError                       Traceback (most recent call last)\n\/Library\/Frameworks\/Python.framework\/Versions\/3.6\/lib\/python3.6\/site-packages\/spectral\/graphics\/hypercube.py in \n     69 try:\n---> 70     import wx\n     71     from wx import glcanvas\nModuleNotFoundError: No module named 'wx'\nDuring handling of the above exception, another exception occurred:\nImportError                               Traceback (most recent call last)\n in \n----> 1 view_cube(img, bands=[29, 19, 9])\n\/Library\/Frameworks\/Python.framework\/Versions\/3.6\/lib\/python3.6\/site-packages\/spectral\/graphics\/graphics.py in view_cube(data, *args, **kwargs)\n    176     to accept keyboard input.\n    177     '''\n--> 178     from spectral.graphics.hypercube import HypercubeWindow\n    179\n    180     if not running_ipython():\n\/Library\/Frameworks\/Python.framework\/Versions\/3.6\/lib\/python3.6\/site-packages\/spectral\/graphics\/hypercube.py in \n     71     from wx import glcanvas\n     72 except ImportError:\n---> 73     raise ImportError(\"Required dependency wx.glcanvas not present\")\n     74\n     75 DEFAULT_WIN_SIZE = (500, 500)           # Default dimensions of image frame\nImportError: Required dependency wx.glcanvas not present\nI used following command to install wx:  \"brew install wxpython\"","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":928,"Q_Id":53369484,"Users Score":0,"Answer":"The problem was related to installation of python package\nUse following command to install by pip :\npip install wxpython\nAnd Use following command to install by conda environment :\nconda install wxpython","Q_Score":4,"Tags":"python,image,hypercube","A_Id":56294778,"CreationDate":"2018-11-19T06:38:00.000","Title":"Unable to use view_cube command due to issue with wx","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":1,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Heron documentation says that it is possible to implement Tumbling windows based on counts. However, heronpy.api.bolt.window_bolt.TumblingWindowBolt has only WINDOW_DURATION_SECS field. How can I implement TumblingWindowBolt based on tuple counts?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":18,"Q_Id":53372849,"Users Score":0,"Answer":"It seems Python API hasn't implemented the feature yet. Java has the best feature support if it is an option to you.","Q_Score":0,"Tags":"python,heron","A_Id":53378717,"CreationDate":"2018-11-19T10:40:00.000","Title":"Heron TumblingWindowBolt based on count not seconds","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am using the google cloud platform app engine to have a main python file serve up a website using flask and a route in that file that will call a python function that is kept in a secondary python file. Whenever I try to call the function via the website I get a module error. Is there any way for me to upload this file alongside main.py so that I can call functions in it without just copying the file to main.py. Also I checked in each bucket and could not see any of my files in any of them but is there a bucket I should upload it to.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":47,"Q_Id":53384553,"Users Score":0,"Answer":"As I understand, you are calling from the main.py file in an App Engine application to a function developed by you in a secondary file. If you want that, is as simple as adding the file in the same folder of your main.py and then you have to deploy your application. Then, all the files of the folder will be uploaded to your App Engine application.","Q_Score":1,"Tags":"python,python-3.x,google-cloud-platform","A_Id":53391185,"CreationDate":"2018-11-20T00:28:00.000","Title":"How do I upload a secondary python file to google cloud platform?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"What's the idiomatic way to setup Airflow so if you have two environments, such as Production-East and Production-West, only the dags from each of these environments show up but they can live in a single repository?","AnswerCount":2,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":1565,"Q_Id":53400870,"Users Score":1,"Answer":"Have the files for each group put inside a subfolder and then set the dags_folder path to point to the appropriate subfolder for the server.","Q_Score":1,"Tags":"python,airflow","A_Id":53404164,"CreationDate":"2018-11-20T20:16:00.000","Title":"Set up Airflow for Multiple Environments","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm working on a domain fronting project. Basically I'm trying to use the subprocess.call() function to interpret the following command:\nwget -O - https:\/\/fronteddomain.example --header 'Host: targetdomain.example'\nWith the proper domains, I know how to domain front, that is not the problem. Just need some help with writing using the python subprocess.call() function with wget.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":292,"Q_Id":53400968,"Users Score":1,"Answer":"I figured it out using curl: \ncall([\"curl\", \"-s\", \"-H\" \"Host: targetdomain.example\", \"-H\", \"Connection: close\", \"frontdomain.example\"])","Q_Score":0,"Tags":"python,subprocess,wget","A_Id":53402135,"CreationDate":"2018-11-20T20:23:00.000","Title":"wget with subprocess.call()","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"It just keeps failing when I do sudo apt-get upgrade because it failed to upgrade some package that based on Python3. The error was: undefined symbol: XML_SetHashSalt. I'd been searching around for solutions but there is no such answer on StackOverflow.\nThen at the end, I found an answer on not very related question mention that the library path for libexpat.so.1 pointing to \/usr\/local\/lib\/ may cause the issue. So I try to rename libexpat.so.1 to libexpat.so.1-bk then it works.\nSo I just re-post it here, hope it helps for anyone facing it.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":1034,"Q_Id":53405066,"Users Score":0,"Answer":"It seems that you have broken your system.\nIf you are using apt, the \/usr\/local\/ should never be used.\nIf you are using \/usr\/local\/, do not use apt to manage your installation.","Q_Score":1,"Tags":"python-3.x","A_Id":53405117,"CreationDate":"2018-11-21T03:58:00.000","Title":"Apt-get error \"undefined symbol: xml_sethashsalt\" when install\/update python3","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm trying to work with ansible, winrm, virtualenv and Jenkins...\nCurrently, I have installed Ansible with Tom via epel-release. \nJenkins has only basic configuration for now.\nI have then created a virtualenv inside Jenkins home named $HOME\/ansible-winrm. Then inside it, I have installed winrm via pip.\nWhat I'm trying to do is :\n- create a simple job on Jenkins with only a shell script calling ansible-playbook. And it should access to the winrm library installed inside my local virtualenv.\n- It should be as transparent as possible.\nP.S. It seems that python binary is hard codded inside ansible-playbook script.\nWhat are your best practices to solve this issue ?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":283,"Q_Id":53416729,"Users Score":0,"Answer":"Best way to do it is installing winrm with pip in user workspace (option --user)\nEx: pip install --user pywinrm","Q_Score":0,"Tags":"python,jenkins,ansible,winrm","A_Id":53433618,"CreationDate":"2018-11-21T16:38:00.000","Title":"Ansible winrm with virtualenv","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to use the AWS IoT basicPubSub.py script to test my AWS connection, but I keep getting this error. I have tried various fixes, but cannot resolve the problem. \nI have tried it using my MacBook and RPi and still have the same issue.\nssl.SSLError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:720)","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":445,"Q_Id":53431396,"Users Score":0,"Answer":"I am not sure how I managed to fix this problem, I tried the following items to fix the problem:\nRe-created all the certificates\nRe-installated CLI using sudo\nInstalled ssl (sudo apt-get install -y libssl-dev)\nI going to do a fresh installation on my RPi and repeat the steps to understand how this was resolved and fixed.","Q_Score":0,"Tags":"python,python-3.x,amazon-web-services,ssl,ssl-certificate","A_Id":53579254,"CreationDate":"2018-11-22T12:47:00.000","Title":"SSL error - certificate verify failed - AWS IOT (basicPubSub.py)","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"Situation\nI wrote a simple program in python. It's a simple socket chatting program. In my program, the client just connect to an address (ip, port) and send a message, while at this time the server is ready and receives the message and prints it. I can assure the program is correct, since I tried on my computer.\nI have a VM instance on Google Cloud Platform, which I can operate through ssh, a simple way provided by google cloud. I can make sure the server is working.\nProblem\nI start a simple tcp server, python program on my google cloud server. Then I start my client program on my computer. But I get this error:\n\nConnectionRefusedError: [WinError 10061] No connection could be made because the target machine actively refused it\n\nor equivalently in Chinese:\n\nConnectionRefusedError: [WinError 10061] \u7531\u4e8e\u76ee\u6807\u8ba1\u7b97\u673a\u79ef\u6781\u62d2\u7edd\uff0c\u65e0\u6cd5\u8fde\u63a5\u3002\n\nHow do I solve this problem and connect to my google cloud server?\nI guess maybe the firewall refused my computer's connection, but have no idea how to solve it.","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":3164,"Q_Id":53454732,"Users Score":4,"Answer":"This error means that your program is not listening on 0.0.0.0 port XYZ.\nCheck to see if your program is instead listening on localhost. If it is change to 0.0.0.0 which means all available networks. localhost means do not listen on any network interfaces and only accept connections from inside the computer.\nThen double check the port number.\nTo see if you have something listening run this command (Linux): netstat -at\nLook for a line with your port XYZ.\nWhen you start your program, make sure that it does not error when creating the listener. If you are trying to use a port number below 1024, you will need to lauch the program with root privileges.","Q_Score":1,"Tags":"python,server,google-cloud-platform,google-compute-engine,firewall","A_Id":53455102,"CreationDate":"2018-11-24T02:40:00.000","Title":"Can't connect to my google cloud VM instance through tcp using python","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"How do I change the IO pub data rate limit on Google Colab? I want to upload a file from my drive but I keep getting this error message:\nIOPub data rate exceeded.\nThe notebook server will temporarily stop sending output\nto the client in order to avoid crashing it.\nTo change this limit, set the config variable\n--NotebookApp.iopub_data_rate_limit.\nCurrent values:\nNotebookApp.iopub_data_rate_limit=1000000.0 (bytes\/sec)\nNotebookApp.rate_limit_window=3.0 (secs)","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":758,"Q_Id":53465075,"Users Score":0,"Answer":"Can you post a minimal repro notebook? Uploading a file shouldn't trigger that limit.","Q_Score":0,"Tags":"python-3.x,file-upload,google-colaboratory","A_Id":53534993,"CreationDate":"2018-11-25T06:05:00.000","Title":"Change IO pub data rate limit on Google Colab","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a task queue, queue A, and a resource queue, queue B. At program start, there are a finite number of resources put in queue B. Tasks may execute if they're able to pull a resource from queue B, and once they're done executing they must put the resource back in queue B. \nUsing Celery, is there a way to pull from a different queue inside a task to accomplish this? Or does this need to be architected completely differently? \nAn alternative, albeit with potentially reduced concurrency, is pairing the task with a resource before it's put in the task queue, then polling the task for completion, and on completion freeing up that resource and putting it back in the task queue with a different task. Is this the standard solution?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":112,"Q_Id":53470909,"Users Score":0,"Answer":"The architecture I ended up deciding on accomplishes this with the help of the chain primitive in Celery, with no loss in concurrency. \nTo ensure that no two tasks are using the same resource concurrently, you can divide all tasks among the available resources before adding the tasks to the queue (so say you had 10 tasks, and 3 resources, simply assign 3 tasks to two of the resources, and 4 to the third resource). Then, for each resource, call the tasks with chain() which tells Celery to execute each of the tasks for that resource in series.","Q_Score":0,"Tags":"python,architecture,rabbitmq,celery,eventlet","A_Id":53529303,"CreationDate":"2018-11-25T19:06:00.000","Title":"How to pull from a different queue inside Celery task","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I am to list all the files and directories in a directory with os.listdir and tell them apart reliably. Is it ok to use just os.path.isdir and consider it's a file if it returns false or should I check os.path.isfile anyway? Are there cases when os.path.exists(path) and os.path.isdir(path) == os.path.isfile(path) happens to be true?","AnswerCount":3,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":765,"Q_Id":53474489,"Users Score":1,"Answer":"os.path.isdir and os.path.isfile both are ok!  os.path.exists(path) and os.path.isdir(path) == os.path.isfile(path) is always False","Q_Score":0,"Tags":"python,os.path","A_Id":53474619,"CreationDate":"2018-11-26T03:36:00.000","Title":"Is os.path.isfile always the opposite of os.path.isdir for an existing file system object?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I need to run a Python script in a terminal, several times. This script requires me to import some libraries. So every time I call the script in the terminal, the libraries are loaded again, which results in a loss of time. Is there any way I can import the libraries once and for all at the beginning?\n(If I try the \"naive\" way, calling first a script just to import libraries then running my code, it doesn't work). \nEDIT: I need to run the script in a terminal because actually it is made to serve in another program developed in Java. The Java code calls the Pythin script in the terminal, reads its result and processes it, then calls it again.","AnswerCount":2,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":1342,"Q_Id":53484032,"Users Score":1,"Answer":"The libraries will be unloaded once the script finishes, so the best way you can handle this is to write the script so it can iterate however many times you want, rather than running the whole script multiple times. I would likely use input() (or raw_input() if you're running Python2) to read in however many times you want to iterate over it, or use a library like click to create a command line argument for it.","Q_Score":1,"Tags":"python","A_Id":53484119,"CreationDate":"2018-11-26T15:10:00.000","Title":"Import Python library in terminal","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'd I like to install virtualenv on an USB disk so that i can use it also on other computers. How can I do it? Just creating a virtualenv on the disk doesn't seem to work...\nI'm using Mac and the target computer has Fedora.","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":1410,"Q_Id":53509305,"Users Score":0,"Answer":"Short answer is YES but of no use.\nThe internal architecture used in Virtualenv, hard codes all the paths as absolute paths in multiple places. Most notably all the files in the \"site-packages\" folder contain hard coded paths and many or most of them are in ascii format. So there is no normal means to change them to a relative paths.\nIt may however work in a very restricted set of situation like if you can maintain the same folder path in all the computers and same family of os etc etc. But and its a really big 'but' whether even in this scenario it will work smoothly.\nUnless there is vendor support from its architecture level you cannot get true portability.\n\nUsing pip-freeze with \"requirements\" file and recreating the\nvirtualenv on all systems separately is the only option available as\nof now.","Q_Score":0,"Tags":"python,virtualenv","A_Id":70205569,"CreationDate":"2018-11-27T22:36:00.000","Title":"Can I install virtualenv on USB Disk?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I used to be able to call python scripts directly from the command line in Windows. e.g.:\n\nC:\\SomeScript.py\n\nBut after setting the python executable to 'Run as Administrator' in the compatibility settings, I always get the cryptic error \"Unable to Create Process using' ... followed by path of the python file I'm trying to run:\n\nUnable to create process using 'C:\\python\\python.exe \"C:\\SomeScript.py\" ' \n\nI get the same error if I try and run the file from Explorer (albeit flashing on my screen briefly,  or if I run the script from the 'Send To' popup.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":828,"Q_Id":53519479,"Users Score":1,"Answer":"This was caused by the Python executable being set to 'Run As Administrator.'  in the compatibility settings;  presumably because windows could not load the UAC form to escalate privileges.\nThere are two possible solutions.\n\nRemove the 'Run as Administrator' setting \nPass the script's path as an argument to Python.exe rather than calling it directly, which allows windows to prompt for escalation correctly.\n\nI.e.  Instead of \n\nc:\\SomeScript.py\n\nrun\n\nc:\\python\\python.exe c:\\SomeScript.py","Q_Score":1,"Tags":"python,windows","A_Id":53519480,"CreationDate":"2018-11-28T12:27:00.000","Title":"Running a python script in Windows gives \"Unable to Create Process Using ...\" when python.exe set to 'run as administrator'","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am using anaconda on mac and I am wondering whether there is a way to clear my python command history. Specifically, upon calling python in terminal, I wanted to clear anything I typed before here.","AnswerCount":6,"Available Count":1,"Score":0.0665680765,"is_accepted":false,"ViewCount":14856,"Q_Id":53530046,"Users Score":2,"Answer":"If your system doesn't use readline, to remove all Python command history just delete the history file at ~\/.python_history.\nYou can see the full path of the history file with:\npython -c \"import os; print(os.path.join(os.path.expanduser('~'), '.python_history'))\".\nOn Windows the history file is at %userprofile%\\.python_history (e.g., 'C:\\Users\\<user>\\.python_history').","Q_Score":16,"Tags":"python","A_Id":67732175,"CreationDate":"2018-11-29T00:15:00.000","Title":"Clear python console command history","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I would like to run an Airflow DAG bi-monthly on a particular Wednesday.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":630,"Q_Id":53534375,"Users Score":1,"Answer":"Pass 0 0 1,15 * 3 to schedule_interval.\nIt is a cron expresssion which means \u201cAt 00:00 on day-of-month 1 and 15 and on Wednesday.\u201d","Q_Score":0,"Tags":"python,cron,airflow","A_Id":53556334,"CreationDate":"2018-11-29T08:07:00.000","Title":"How to schedule an Airflow DAG to run Bi-monthly","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"How can I launch PyCharm from terminal \/ command prompt?\nI tried charm, charm., pycharm., pycharm. \nNone of these commands work.\nIs it possible to open\/launch PyCharm from a command prompt \/ terminal ?","AnswerCount":6,"Available Count":4,"Score":0.0665680765,"is_accepted":false,"ViewCount":17131,"Q_Id":53535942,"Users Score":2,"Answer":"Redirect to your codebase directory and type pycharm-community . in the terminal\nWorks with Ubuntu, macOS, and Windows","Q_Score":7,"Tags":"python,terminal,command,pycharm,jetbrains-ide","A_Id":57784300,"CreationDate":"2018-11-29T09:41:00.000","Title":"How to launch PyCharm from terminal\/command prompt","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"How can I launch PyCharm from terminal \/ command prompt?\nI tried charm, charm., pycharm., pycharm. \nNone of these commands work.\nIs it possible to open\/launch PyCharm from a command prompt \/ terminal ?","AnswerCount":6,"Available Count":4,"Score":1.2,"is_accepted":true,"ViewCount":17131,"Q_Id":53535942,"Users Score":5,"Answer":"From examining the shortcut on my Ubuntu desktop (on which I have the community version of Pycharm installed) the command it runs is \"pycharm-community\" So this works when run in a terminal, for example:\npycharm-community &\nIf you are using Windows, you can use the same trick to find out where Pycharm is installed (examining the shortcut on your start menu or desktop). For me, it is:\n\"C:\\Program Files (x86)\\JetBrains\\PyCharm 2016.3.1\\bin\\pycharm64.exe\"\nRunning that from a git bash prompt launches Pycharm for me.\nYou probably want to examine your own shortcut to find the correct location on your computer.\nYou can find the shortcut file from the Start Menu by right-clicking on the Pycharm entry and selecting Open file location. Or you can just look at the shortcut on your desktop if you have one there.\nWhen you have located the shortcut file, right-click it, click Properties, select the Shortcut tab, and look in the field called Target: to see the location of the Pycharm executable.","Q_Score":7,"Tags":"python,terminal,command,pycharm,jetbrains-ide","A_Id":53536111,"CreationDate":"2018-11-29T09:41:00.000","Title":"How to launch PyCharm from terminal\/command prompt","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"How can I launch PyCharm from terminal \/ command prompt?\nI tried charm, charm., pycharm., pycharm. \nNone of these commands work.\nIs it possible to open\/launch PyCharm from a command prompt \/ terminal ?","AnswerCount":6,"Available Count":4,"Score":0.0,"is_accepted":false,"ViewCount":17131,"Q_Id":53535942,"Users Score":0,"Answer":"This worked for me on my 2017 imac macOS Mojave (Version 10.14.3).\n\nOpen your ~\/.bash_profile:\nnano ~\/.bash_profile\nAppend the alias:\nalias pycharm=\"open \/Applications\/PyCharm\\ CE.app\"\nUpdate terminal:\nsource ~\/.bash_profile\nAssert that it works:\npycharm","Q_Score":7,"Tags":"python,terminal,command,pycharm,jetbrains-ide","A_Id":55210725,"CreationDate":"2018-11-29T09:41:00.000","Title":"How to launch PyCharm from terminal\/command prompt","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"How can I launch PyCharm from terminal \/ command prompt?\nI tried charm, charm., pycharm., pycharm. \nNone of these commands work.\nIs it possible to open\/launch PyCharm from a command prompt \/ terminal ?","AnswerCount":6,"Available Count":4,"Score":0.1651404129,"is_accepted":false,"ViewCount":17131,"Q_Id":53535942,"Users Score":5,"Answer":"If you are using ubuntu, go to pycharm\/bin folder and run pycharm.sh file using below command\n\n.\/pycharm.sh","Q_Score":7,"Tags":"python,terminal,command,pycharm,jetbrains-ide","A_Id":53536011,"CreationDate":"2018-11-29T09:41:00.000","Title":"How to launch PyCharm from terminal\/command prompt","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Given that a Pipfile exists, it seems that both would install all dependencies from the Pipfile, and update Pipfile.lock. So, what is the difference?","AnswerCount":2,"Available Count":1,"Score":1.0,"is_accepted":false,"ViewCount":2190,"Q_Id":53545505,"Users Score":6,"Answer":"pipenv lock generates a consistent set of dependencies from Pipfile and writes that to Pipfile.lock. It doesn't change the installed packages.\npipenv install with no arguments would generate the same set of dependencies and install them into the virtualenv.\nI find the Pipenv documentation unclear.","Q_Score":4,"Tags":"python,pipenv,pipfile","A_Id":56903859,"CreationDate":"2018-11-29T18:35:00.000","Title":"What's the difference between `pipenv install` and `pipenv lock`?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I want to run a script on cluster (SBATCH file).\n\nHow can activate  my virtual environment (path\/to\/env_name\/bin\/activate).\n\nDoes I need only to add the following code to my_script.sh file?\nmodule load python\/2.7.14\nsource \"\/pathto\/Python_directory\/ENV2.7_new\/bin\/activate\"","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":16538,"Q_Id":53545690,"Users Score":2,"Answer":"Yes. Just make sure to insert those lines after the SBATCH ... lines and before any use of python.","Q_Score":13,"Tags":"python,slurm,sbatch","A_Id":53559868,"CreationDate":"2018-11-29T18:48:00.000","Title":"How to activate a specific Python environment as part of my submission to Slurm?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I work on web application that generates pdf, it returns generated pdf file. Previously I handled the pdf generation in the main process. My superior told me, that will potentially cause the app to stall, as django is synchronous.\nSo he suggest offload the process to celery, I tried it and have the idea about how to process it using celery. But I can't figure out the how to return the response to the client.\nI can return response that it's being processed, but what about the pdf file? return the possible url too? and send request every now and then?","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":56,"Q_Id":53550436,"Users Score":1,"Answer":"Typically this is handled by making the HTTP interaction asynchronous as well.\nInstead of returning the PDF, you'd return a future link that the PDF will be available on or a processing status page, and the client can poll on that link to retrieve the PDF. Typically, this is done by returning HTTP 202 Accepted response.\nOther alternative that may be suitable in different circumstances is to return the response in a WebSocket push message. This may be suitable if your already have a WebSocket connection in the app or if you need lower latency than can be provided by polling. If the processing takes very long time (e.g hours), it may be appropriate to ask the user their email address (or take the email address from the user's profile) and send the user an email when they can retrieve the result.","Q_Score":1,"Tags":"python,django,celery","A_Id":53550560,"CreationDate":"2018-11-30T02:37:00.000","Title":"How can one return offloaded process response from celery?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I am trying to obtain an application variable (app user id) in before_execute(conn, clauseelement, multiparam, param) method. The app user id is stored in python http request object which I do not have any access to in the db event.\nIs there any way to associate a piece of sqlalchemy external data somewhere to fetch it in before_execute event later? \nAppreciate your time and help.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":98,"Q_Id":53551209,"Users Score":0,"Answer":"Answering my own question here with a possible solution :)\n\nFrom http request copied the piece of data to session object\nSince the session binding was at engine level, copied the data from session to connection object in SessionEvent.after_begin(session, transaction, connection). [Had it been Connection level binding, we could have directly set the objects from session object to connection object.]\n\nNow the data is available in connection object and in before_execute() too.","Q_Score":0,"Tags":"python,sqlalchemy","A_Id":53667953,"CreationDate":"2018-11-30T04:23:00.000","Title":"Sqlalchemy before_execute event - how to pass some external variable, say app user id?","Data Science and Machine Learning":0,"Database and SQL":1,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I am trying to build an IoT device and looking forward to build something like this:\nSchematic:\n\nA python process which runs as a loop to interact with hardware components\nA TCP server(Pub-Sub) which takes commands from its clients and pass on to (1)\n(1) can interact with (2) to publish an event and (2) can interact with (1) to control the hardware\n\nHere is what I tried:\n\nUsing twisted, I created a pub sub service\ntried to command that service to emit events\nTCP listener on a Node.js serever to interact with Twisted TCP server\n\nThis is what I observed:\nNode.js server is able to send messages to Twisted server properly.\nTwisted blocks executing other code (Schematic:1) after calling reactor.run() as it starts listening on a port.\nI would like to have both the process run simultaneously and interact with each other.\nIs there a way to achieve this without using multithread or multiprocesses?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":43,"Q_Id":53552588,"Users Score":0,"Answer":"I solved this using asyncio\nWe can run 2 loops which can be asynchronous, with asyncio.sleep in both the loops so other loop gets its turn to execute.\npython docs also has a tcp server example with asyncio, so there that solved my requirement","Q_Score":0,"Tags":"python,tcp,twisted","A_Id":54178503,"CreationDate":"2018-11-30T06:46:00.000","Title":"Run a TCP and looped process in python","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"We are trying to use the Structured Streaming with Kafka integration for one of the use case. While i was going through the Batch interval, i can see one-time trigger.\nIs it same like Daily once (batch processing)?\nBased on what it will trigger the next pull OR do we need to schedule it?","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":264,"Q_Id":53554902,"Users Score":1,"Answer":"If my understanding is right, there's no mechanism on scheduling next batch for one time trigger. So you may need to schedule it manually, something like crontab.","Q_Score":0,"Tags":"python,spark-structured-streaming","A_Id":53680714,"CreationDate":"2018-11-30T09:42:00.000","Title":"Structured Streaming - what is one time trigger?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I just learnt about GCP Composer and am trying to move the DAGs from my local airflow instance to cloud and had a couple of questions about the transition. \n\nIn local instance I used HiveOperator to read data from hive and create tables and write it back into hive. If I had to do this in GCP how would this be possible? Would I have to upload my data to Google Bucket and does the HiveOperator work in GCP?\nI have a DAG which uses sensor to check if another DAG is complete, is that possible on Composer?","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":238,"Q_Id":53560978,"Users Score":0,"Answer":"Composer have connection store. See menu Admin--> Connection. Check connection type available.\nSensors are available.","Q_Score":1,"Tags":"python,google-cloud-platform,airflow,google-cloud-composer","A_Id":53672600,"CreationDate":"2018-11-30T16:03:00.000","Title":"Creating Airflow DAGs on GCP Composer","Data Science and Machine Learning":0,"Database and SQL":1,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I just learnt about GCP Composer and am trying to move the DAGs from my local airflow instance to cloud and had a couple of questions about the transition. \n\nIn local instance I used HiveOperator to read data from hive and create tables and write it back into hive. If I had to do this in GCP how would this be possible? Would I have to upload my data to Google Bucket and does the HiveOperator work in GCP?\nI have a DAG which uses sensor to check if another DAG is complete, is that possible on Composer?","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":238,"Q_Id":53560978,"Users Score":0,"Answer":"Yes, Cloud Composer is just managed Apache Airflow so you can do that.\nMake sure that you use the same version of Airflow that you used locally. Cloud Composer supports Airflow 1.9.0 and 1.10.0 currently.","Q_Score":1,"Tags":"python,google-cloud-platform,airflow,google-cloud-composer","A_Id":53564941,"CreationDate":"2018-11-30T16:03:00.000","Title":"Creating Airflow DAGs on GCP Composer","Data Science and Machine Learning":0,"Database and SQL":1,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I want to let the user start downloading a file when it's not ready yet. I don't want to send user to some page saying \"Wait 30 seconds, file is being prepared.\" I can't generate the file in advance. I need user to click\/send form, choose download location and start downloading. Generated file will be zip, so I imagine, that it should be possible to send file name with first few bytes of zips (which are always same) and before the file is generated don't confirm that tcp packet was send correctly or something like that, and after the file is generated send the rest.\nHow do I do that? Is there any tool which can do that. Or is there some better way? More high level solution better, C isn't my strong suit. Preferably in Python. Thanks.\nFile being generated is zip and before it's prepared there isn't really anything to send yet. Basically according to input I generate set of files (which takes few dozens seconds), than I zip them and serve to user. My application is in python on linux but which server I'll use isn't really important.","AnswerCount":3,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":368,"Q_Id":53564699,"Users Score":0,"Answer":"Usually, application like this will be implement in two parts, like a ticket system.\n\nWhen user click\/submit the form, the form will send request to a service that will start generating the file as a background process, then (without waiting for the file to generate) it will generate a ticket\/hash that represent the new file and then redirect user to a new URL, e.g. \/files\/<random-hash>\nOn this new URL, \/files\/<random-hash>, while the files is not ready, it'll return a simple HTML page that show message to user to wait, and have a script on the page that will keep refreshing the page every few seconds. As long as the files is not ready, it'll keep showing this message, but once the file is ready, this URL will return the actual files content in its response with appropriate mime-header instead.\n\nThe solution is quite simple to implement using a database and some programming. Though, if you're looking for an already-made tool ready to use, I'm sorry I'm not familiar with one. Hope this help.","Q_Score":3,"Tags":"python,http,tcp,server","A_Id":53668981,"CreationDate":"2018-11-30T20:48:00.000","Title":"How to let user download file while it's being generated","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I want to let the user start downloading a file when it's not ready yet. I don't want to send user to some page saying \"Wait 30 seconds, file is being prepared.\" I can't generate the file in advance. I need user to click\/send form, choose download location and start downloading. Generated file will be zip, so I imagine, that it should be possible to send file name with first few bytes of zips (which are always same) and before the file is generated don't confirm that tcp packet was send correctly or something like that, and after the file is generated send the rest.\nHow do I do that? Is there any tool which can do that. Or is there some better way? More high level solution better, C isn't my strong suit. Preferably in Python. Thanks.\nFile being generated is zip and before it's prepared there isn't really anything to send yet. Basically according to input I generate set of files (which takes few dozens seconds), than I zip them and serve to user. My application is in python on linux but which server I'll use isn't really important.","AnswerCount":3,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":368,"Q_Id":53564699,"Users Score":0,"Answer":"The client would most likely timeout(or wait 30 seconds without notification) while the file was prepared.  I would use a stream compression algorithm(gzip) to compress the file(s) while in transit. This would not result in the best compression, but would serve the files in a predictable manner.  \nInvestigate the \"Content-Encoding: gzip\" HTTP header.","Q_Score":3,"Tags":"python,http,tcp,server","A_Id":53624072,"CreationDate":"2018-11-30T20:48:00.000","Title":"How to let user download file while it's being generated","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am using spyder from time to time, on both linux and windows platforms. The behavior w.r.t. adjusting imported libraries is different on the two:\n\non linux, while running the same kernel (no restart needed), in the middle of some computations, i can adjust some library code, re-select a block of code, run it and i see the new library code being used\non windows, i have to restart the kernel to achieve this effect, as re-selecting keeps running the old code, initially loaded\n\nI am wondering if this has to do with the OS difference or perhaps there is something wrong with the windows version of spyder\/anaconda i have. How can i achieve the same behavior in windows?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":22,"Q_Id":53565886,"Users Score":1,"Answer":"Well, following Carlos' suggestion i updated to anaconda3 5.2.0 on windows (it's a work computer with company policies in place, cannot update to any version i wish), and i have spyder 3.2.8 on it and this version of spyder has the feature i was looking for, unlike the previous one.","Q_Score":1,"Tags":"python-3.x,spyder","A_Id":53675526,"CreationDate":"2018-11-30T22:42:00.000","Title":"under windows, python3 library changes are not seen in spyder until kernel is restarted","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have created an workflow (contains few tasks). It is hourly execution. Workflow should be triggered only if another instance of workflow is not running at same time. If it is running, workflow execution should be skipped for that hour.\nI checked with \"depends_on_past\" but couldn't get it.","AnswerCount":2,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":536,"Q_Id":53573857,"Users Score":1,"Answer":"Set the max_active_runs on your DAG to 1 and also catchup to False","Q_Score":1,"Tags":"python,airflow","A_Id":53574587,"CreationDate":"2018-12-01T18:33:00.000","Title":"Airflow: how to specify condition for hourly workflow like trigger only if currently same instance is not running?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"i can connect locally to my mongodb server with the address 0.0.0.0\/0. However, when I deploy my code to the cloud I get the error deploy to google cloud function.\ngoogle cloud function with python 3.7 (beta)\natlas mongo db\npython lib:\n-pymongo\n-dnspython\nError: function crashed. Details:\nAll nameservers failed to answer the query _mongodb._tcp.**-***.gcp.mongodb.net. IN SRV: Server ***.***.***.*** UDP port 53 answered SERVFAIL\nTraceback (most recent call last): File \"\/env\/local\/lib\/python3.7\/site-packages\/pymongo\/uri_parser.py\", line 287, in _get_dns_srv_hosts results = resolver.query('_mongodb._tcp.' + hostname, 'SRV') File \"\/env\/local\/lib\/python3.7\/site-packages\/dns\/resolver.py\", line 1132, in query raise_on_no_answer, source_port) File \"\/env\/local\/lib\/python3.7\/site-packages\/dns\/resolver.py\", line 947, in query raise NoNameservers(request=request, errors=errors) dns.resolver.NoNameservers: All nameservers failed to answer the query _mongodb._tcp.**mymongodb**-r091o.gcp.mongodb.net. IN SRV: Server ***.***.***.*** UDP port 53","AnswerCount":2,"Available Count":1,"Score":0.3799489623,"is_accepted":false,"ViewCount":3909,"Q_Id":53576199,"Users Score":4,"Answer":"finally after stuck 2 day, goblok banget semaleman\njust change connection \nfrom \n\nSRV connection string (3.6+ driver)\n\nto \n\nStandard connection string (3.4+ driver)\n\nmongodb:\/\/<USERNAME>:<PASSWORD>@<DATABASE>-shard-00-00-r091o.gcp.mongodb.net:27017,<COLLECTION>-shard-00-01-r091o.gcp.mongodb.net:27017,<COLLECTION>-shard-00-02-r091o.gcp.mongodb.net:27017\/test?ssl=true&replicaSet=<COLLECTION>-shard-0&authSource=admin&retryWrites=true\nor you can see your connection string in atlas mongodb.\nidk why can`t connect with srv connection string in google cloud functions, maybe not suppot now, or just misconfiguration.","Q_Score":3,"Tags":"python,mongodb,google-cloud-functions,mongodb-atlas","A_Id":53582632,"CreationDate":"2018-12-02T00:09:00.000","Title":"All nameservers failed to answer UDP port 53 Google cloud functions python 3.7 atlas mongodb","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am using Pyro4 in a distributed system. My problem is that after two networks connect there can be many nameserver. It is ok for me but if any of them is empty  (has no objects registered) my network can fail . \nThis is because I am implementing chord and I need to know if there is any chord node running already (if the empty nameserver responds then two chord rings will be created.\nIs there any way to kill a nameserver if it is empty?\nMy code is in python3. Thanks","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":180,"Q_Id":53582748,"Users Score":0,"Answer":"Pyro's name server assumes it is running all the time: you never know if there will be someone a bit later that wants to register a new name. If you really need it to auto shutdown, you'll have to either wrap the default name server in some custom code, or use some form of watchdog process that kills the name server if it detects that it has 0 entries.\nYou can get the number of entries via a regular Pyro call to the nameserver: ns.count().  For obvious reasons, it's not possible to remotely shutdown the nameserver via such a Pyro API call, hence the need of a watch dog process.","Q_Score":0,"Tags":"python,pyro,chord,pyro4","A_Id":53584087,"CreationDate":"2018-12-02T17:24:00.000","Title":"Pyro4 kill empty nameserver","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"So I noticed the main download button for Python 3 downloads an executable that runs a wizard that is titled \"Python 3 (32 Bit)\" so I  figured \"ahh that's fine I'll just run 32 bit Python on my 64 bit OS\" but out of curiosity I stopped the install and went back to the site to find \"Windows x86-64 executable installer  Windows for AMD64\/EM64T\/x64 4c9fd65b437ad393532e57f15ce832bc    26260496\" and it downloads as \"python-3.7.1-amd64.exe\"I was just wondering what the heck is going on?\nWhy is the Python 3 Windows AMD64\/EM64T\/x64 installer a \".amd64\" file?","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":4954,"Q_Id":53604692,"Users Score":1,"Answer":"\".amd64\" is a file extension for 64 bit binaries. While \".exe\" is more common, the Python 3 64-bit installer is probably labeled \".amd64\" to specify that it is meant to be run on 64-bit machines.","Q_Score":2,"Tags":"python-3.x","A_Id":53604880,"CreationDate":"2018-12-04T02:06:00.000","Title":"Why is the Python 3 Windows AMD64\/EM64T\/x64 installer a \".amd64\" file?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"So, I worked with VSC earlier, no problem whatsoever. Then it didn't work anymore, something about node not being found in PATH\nDownloaded Node, and now it sais\n|-------------------------------------------------------------------|\n| (X)..Cannot launch program...................................|\n| ........'c:\\users...\\decimal_converter.py';..................|\n| ........setting the 'outFiles' attribute might................|\n|..................................|Open launch.json| |cancel|...|\n|-------------------------------------------------------------------|\nNow, since it originally worked I am confused why it doesn't anymore: ATOM has no problem running my code. What could actually cause that. I will for the time being continue to use Atom, I am currently trying both to see what fits me. Would be cool if VSC stopped breaking.\nI researched online, but solutions are not working and far between.\nThanks,\nMartin","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":1082,"Q_Id":53616843,"Users Score":1,"Answer":"Okay, so, wow. I fixed it but I don't know if that's fixing the problem or the symptom.\nFor further reference, if anyone has this problem:\nI don't know why, but it tried to run the launch.jsn. I tried around, nothing worked. So, I just deleted everything.\nIt worked again. Until it didn't. This time I only deleted 'launch,jsn' and it works again. My unprofessional SUSPISSION is that it hates me, or that it tries to run 'launch.jsn'. Once it was deleted it worked again.\nIs it smart to delete it? IDK, but it worked.","Q_Score":0,"Tags":"python,python-3.x,visual-studio-code,ide","A_Id":53617026,"CreationDate":"2018-12-04T15:58:00.000","Title":"Visual studio Code error, setting the 'outFiles' might heIp","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I used to run Python scripts from my Windows command line, and all the prints were printed in the same console. Now something happened on my machine (Windows 10), and when I launch a Python script from the command line (i.e. open a Command Prompt and run python <my_script.py>), Windows opens a new window (titled with the absolute path of python.exe). This windows closes automatically at the end of the execution, so that I can't see the output.\nHow do I go back to printing output in the same command prompt window from which I run the script?","AnswerCount":4,"Available Count":3,"Score":0.0,"is_accepted":false,"ViewCount":5063,"Q_Id":53623318,"Users Score":0,"Answer":"In my computer this was caused by Windows not knowing what program a .py file was associated with.  I solved this by going to:\nControl Panel -> Programs -> Default Programs -> Associate a file type or protocol with a program (Scroll down) and choose \"Choose default apps by file type\" Scroll down until you see \".py\" and choose the correct\nPython interpreter.","Q_Score":4,"Tags":"python,windows,windows-console","A_Id":69922616,"CreationDate":"2018-12-05T00:12:00.000","Title":"Python.exe opens in a new console window","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I used to run Python scripts from my Windows command line, and all the prints were printed in the same console. Now something happened on my machine (Windows 10), and when I launch a Python script from the command line (i.e. open a Command Prompt and run python <my_script.py>), Windows opens a new window (titled with the absolute path of python.exe). This windows closes automatically at the end of the execution, so that I can't see the output.\nHow do I go back to printing output in the same command prompt window from which I run the script?","AnswerCount":4,"Available Count":3,"Score":-0.0996679946,"is_accepted":false,"ViewCount":5063,"Q_Id":53623318,"Users Score":-2,"Answer":"Simply: last row on the end of your program maybe this:\ninput(\"\\nIf you whish end the program press any key ...\")\n...and your program wait for the key and you see your outcome","Q_Score":4,"Tags":"python,windows,windows-console","A_Id":61848115,"CreationDate":"2018-12-05T00:12:00.000","Title":"Python.exe opens in a new console window","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I used to run Python scripts from my Windows command line, and all the prints were printed in the same console. Now something happened on my machine (Windows 10), and when I launch a Python script from the command line (i.e. open a Command Prompt and run python <my_script.py>), Windows opens a new window (titled with the absolute path of python.exe). This windows closes automatically at the end of the execution, so that I can't see the output.\nHow do I go back to printing output in the same command prompt window from which I run the script?","AnswerCount":4,"Available Count":3,"Score":0.049958375,"is_accepted":false,"ViewCount":5063,"Q_Id":53623318,"Users Score":1,"Answer":"It's odd but it very likely a windows setup issue as python is an exe. If memory serves windows will spawn on a > run command so checking the way python is booting will help.\nUnfortunately it could be a range of issues, so some steps towards victory:\nWhat happen when you just type python into the cmd? If it simply starts the input >>> - it means your python setup is fine. If a cmd window spawns and disappears it may be a windows permissions issue.\nTry running your script with -i flag: python -i script.py. This drops you into the repl when the app completes - displaying your output. \nEnsure you're using the native flavour of the cmd to test. Ensuring any command app or IDE isn't injecting a start  command or weird \/K (spawn new window) flag.\nHope it helps.","Q_Score":4,"Tags":"python,windows,windows-console","A_Id":53623797,"CreationDate":"2018-12-05T00:12:00.000","Title":"Python.exe opens in a new console window","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a Python project set up in a virtualenv that I created directly from the terminal. When I try to open it in PyCharm, I am able to see the files, but I can't change the project interpreter to use my virtualenv. I am able to see the python executable file both through the WSL terminal and the Windows File Explorer, but when I try to add it as a project interpreter from PyCharm, I am unable to find it.\nI have tried deleting my .idea directory and adding the project to PyCharm again. I have tried creating a new project in PyCharm using my project's root directory. I have tried editing the SDK_HOME variable in .idea\/workspace.xml to be the location of the python executable, but it didn't change the project interpreter.\nAnyone have any ideas?\nI am using WSL for the terminal and Windows 10 for my OS.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":806,"Q_Id":53624955,"Users Score":0,"Answer":"It is probably because what you have is a symlink and not a copy of the interpreter.\nTry creating the environment by adding the --copies option:\nvirtualenv myenv --copies","Q_Score":0,"Tags":"python,pycharm,virtualenv","A_Id":64752496,"CreationDate":"2018-12-05T03:56:00.000","Title":"PyCharm can't find virtualenv interpreter","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Is there any way to get all the instances using the python google library without having to iterate through all the zones and request the instances individually?\nThank you","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":216,"Q_Id":53626692,"Users Score":4,"Answer":"No, you must iterate thru each of your projects and then each zone within the project. If you are only using one project, then iterate thru each zone.\nThis may sound unusual, but think of it this way. Each zone is a data center. You are connecting to each data center to access resources.","Q_Score":1,"Tags":"python,google-cloud-platform","A_Id":53626926,"CreationDate":"2018-12-05T06:50:00.000","Title":"Python GCP get all instances from any zone","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am using a Jupiter Notebook for making a machine learning model using turicreate. When ever I upload a big .csv file, I get a message: kernel died. Since I am new in python is there an other way to Batch loading file or anyone nows how to fix this issue ?\nThe csv file is 52.9 MB\nThanks","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":3050,"Q_Id":53669913,"Users Score":0,"Answer":"53MB is not a big file ! You should try to load this in a ipython terminal to test.\nLoad as you would in a Jupyter to see if you have any issue. If there is no issue, This could be a bad installation of Jupyter.\nNote : The kernel dies mostly when you're out of RAM. But 53MB is not that big, assuming you have at least 2 or 4G or RAM on your laptop, an error like this shouldn't happend","Q_Score":1,"Tags":"python,python-3.x,machine-learning,jupyter-notebook,turi-create","A_Id":53670039,"CreationDate":"2018-12-07T12:49:00.000","Title":"Jupyter notebook : kernel died msg when loading big CSV file","Data Science and Machine Learning":1,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm running Apache Airflow on Kubernetes and running into a strange error when trying to pull log files.\n*** Failed to fetch log file from worker. HTTPConnectionPool(host='geometrical-galaxy-7364-worker-0.geometrical-galaxy-7364-worker.astronomer-geometrical-galaxy-7364.svc.cluster.local', port=8793): Max retries exceeded with url: \/log\/FILE\/begin\/2018-12-06T00:00:00\/1.log (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x7f7e86dab7b8>: Failed to establish a new connection: [Errno 111] Connection refused',))\nIt looks to me like there are too many requests being made on the stateful set (if I jump into the pod that holds the log files they are all there, but they don't get pulled into the UI that's trying to pull them).\nIs there somewhere that a limit for HTTP requests for a stateful set or a pod gets set?","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":157,"Q_Id":53677492,"Users Score":0,"Answer":"I'm fairly certain the error you're seeing is from Airflow trying to fetch task logs from a worker via requests, which uses urllib3, that attempts retries on failed HTTP requests. \nYour webserver is attempting to get the logs, being denied by the worker server, and is erroring out. Make sure you're running airflow serve-logs on all workers and that the port is open from your webserver to each.","Q_Score":2,"Tags":"python-3.x,kubernetes,airflow,google-kubernetes-engine","A_Id":53734340,"CreationDate":"2018-12-07T22:20:00.000","Title":"Setting HTTP request settings on KubernetesPods","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I've made a simple python application that I want to distribute for beta testing, I am on a windows computer and my beta testing Operating Systems include windows, mac, and ubuntu.\nMy question is how would I compile the program to a standalone application on Mac and Linux (Windows is already sorted)","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":302,"Q_Id":53687571,"Users Score":0,"Answer":"From my experience, you cannot create a standalone version of a Python program for a different OS then the one you're using for compiling. \nI'm a Mac user, and when I want to generate a Windows Executable, I use a Windows that I installer at my VM, and compile from there. The same for Linux.\nIn any case, I use pyinstaller lib to generate an executable, which is really simple:\n1. Install the lib: pyinstaller.readthedocs.io\/en\/v3.3.1\/installation.html\n2. On your terminal, walk to the folder where is your .py file\n3. Just type pyinstaller --onefile filename.py\n4. 2 new folders will be created at the folder, dist and build. So just open the dist folder to find your executable\nHere you see I use the --onefile parameter, and I find best, because without it, your dist folder will generate a folder full of content from each dependency and other aspects, and it's not neat to share this with users. With --onefile the users will only find one executable file.","Q_Score":0,"Tags":"python,compilation","A_Id":53687795,"CreationDate":"2018-12-08T22:23:00.000","Title":"Compile Python Program For Distribution","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to automate a python script through the Windows Task Scheduler but its not working. At the end of my python script. two CSV files should be created but they arent.\nI tried the following: \n1. Copied the address of my python.exe to Program\/Script.\n\nC:\\Program Files\\Python35\\python.exe\n\n\nIn the Add arguments, i put the name of my file\n\n\nHistorical Aggregation.py\n\n\nIn the Start in (optional), i put the path of my python script\n\n\nC:\\Users\\myname\\PycharmProjects\\Project1\n\nAm I missing something","AnswerCount":3,"Available Count":2,"Score":0.1325487884,"is_accepted":false,"ViewCount":9087,"Q_Id":53712180,"Users Score":2,"Answer":"Another approach would be to set fields as:\n\nProgram\/Script - your python path (with quotation marks):\n\n\n\"C:\\Program Files\\Python35\\python.exe\"\n\n\nAdd arguments - full file name of the script, including it's path (with quotation marks):\n\n\n\"C:\\Users\\myname\\PycharmProjects\\Project1\\Historical Aggregation.py\"","Q_Score":2,"Tags":"python,scheduled-tasks","A_Id":53712600,"CreationDate":"2018-12-10T19:14:00.000","Title":"Running a python script through Windows Scheduler not working","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to automate a python script through the Windows Task Scheduler but its not working. At the end of my python script. two CSV files should be created but they arent.\nI tried the following: \n1. Copied the address of my python.exe to Program\/Script.\n\nC:\\Program Files\\Python35\\python.exe\n\n\nIn the Add arguments, i put the name of my file\n\n\nHistorical Aggregation.py\n\n\nIn the Start in (optional), i put the path of my python script\n\n\nC:\\Users\\myname\\PycharmProjects\\Project1\n\nAm I missing something","AnswerCount":3,"Available Count":2,"Score":0.1973753202,"is_accepted":false,"ViewCount":9087,"Q_Id":53712180,"Users Score":3,"Answer":"I had a very similar issue, and solved it in a different way. Here my step by step guide:\n\nTransform the python script to an .exe, using in the DOS cmd prompt the command: \npyinstaller -- onefile [name of the file.py]\nPlace the CSV file that you want to update in the same folder as the .exe file created\nCreate a basic task on Windows Scheduler, with the following properties:\n\nGeneral - select\n\nRun whether user is logged on or not \nadd the PC password. For my PC, use the user name DESKTOP-M40FS79\\dario and the PC password\nRun with highest privileges \n\nTriggers \u2013 select \n\nDaily\nRepeat task every 30 minutes\nStop task if it runs longer than 15 minutes\n\nActions\n\nUnder Program\/ Script insert the path to your .exe file, for instance, C:\\Pythondata\\dist\\test.exe\nUnder Start in (optional) insert the path to the directory where the CSV and .exe files are, for instance C:\\Pythondata\\dist\\\n\nConditions - select\n\nStart the task only if the computer is on AC power, and make sure you have connected the power\nWake the computer to run this task\n\nSettings \u2013 leave the default options\n\nSave the task by inserting the password\nLeave the task status on \u201cReady\u201d\n\nGood luck!","Q_Score":2,"Tags":"python,scheduled-tasks","A_Id":56252185,"CreationDate":"2018-12-10T19:14:00.000","Title":"Running a python script through Windows Scheduler not working","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am attempting to convert my python file (.py) into a Windows executable (.exe). To do this, I am using Pyinstaller. My python includes the module PyBluez for Bluetooth capabilities. When I run the command pyinstaller <path> -F from the directory of the py file, it gives an error:\n\nFileNotFoundError: [Errno 2] No such file or directory: 'c:\\users\\X\\appdata\\local\\programs\\python\\python37-32\\lib\\site-packages\\pybluez-0.22-py3.7-win32.egg\\bluetooth\\widcomm.py'\n\nAfter quite a bit of research, I am unable to figure out what is wrong with my program. Do I need to specifically specify where to find the egg file? If so, How would I do that? Thank you! Also, I tried to use cx_Freeze and it also gave an error about the bluetooth module:\n\nTraceback (most recent call last):\n    File \"C:\\Users\\X\\AppData\\Local\\Programs\\Python\\Python37\\lib\\site-packages\\cx_Freeze\\initscripts__startup__.py\", line 14, in run\n      module.run()\n    File \"C:\\Users\\X\\AppData\\Local\\Programs\\Python\\Python37\\lib\\site-packages\\cx_Freeze\\initscripts\\Console.py\", line 26, in run\n      exec(code, m.dict)\n    File \"BuzzerBeater.py\", line 3, in \n  ModuleNotFoundError: No module named 'bluetooth'","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":1150,"Q_Id":53715182,"Users Score":0,"Answer":"I had the same problem, and managed to solve it by unzipping the .egg file to a folder with the same name (including .egg in the folder name), in my case C:\\Users\\X\\AppData\\Local\\Programs\\Python\\Python37\\Lib\\site-packages\\PyBluez-0.22-py3.7-win-amd64.egg\\.","Q_Score":0,"Tags":"python,pyinstaller,cx-freeze,egg","A_Id":54147425,"CreationDate":"2018-12-10T23:21:00.000","Title":"Pyinstaller Error Bundling Egg Files FileNotFoundError: [Errno 2] No such file or directory","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am working on a django application which uses celery for the distributed async processes. Now I have been tasked with integrating a process which was originally written with concurrent.futures in the code. So my question is, can this job with the concurrent futures processing work inside the celery task queue. Would it cause any problems ? If so what would be the best way to go forward. The concurrent process which was written earlier is resource intensive as it is able to avoid the GIL. Also, its very fast due to it. Not only that the process uses concurrent.futures.ProcessPoolExecutor and inside it another few (<5) concurrent.futures.ThreadPoolExecutor jobs.\nSo now the real question is should we extract all the core functions of the process and re-write them by breaking them as celery app tasks or just keep the original code and run it as one big piece of code within the celery queue.\nAs per the design of the system, a user of the system can submit several such celery tasks which would contain the concurrent futures code.\nAny help will be appreciated.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":611,"Q_Id":53738183,"Users Score":0,"Answer":"Your library should work without modification. There's no harm in having threaded code running within Celery, unless you are mixing in gevent with non-gevent compatible code for example.\nReasons to break the code up would be for resource management (reduce memory\/CPU overhead). With threading, the thing you want to monitor is CPU load. Once your concurrency causes enough load (e.g. threads doing CPU intensive work), the OS will start swapping between threads, and your processing gets slower, not faster.","Q_Score":1,"Tags":"python,django,celery,concurrent.futures","A_Id":53891099,"CreationDate":"2018-12-12T07:39:00.000","Title":"Running a python program which uses concurrent.futures within a celery based web app","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":1},{"Question":"Trying Python + Python Appium Library + WinAppDriver to perform a simple automation task:\n\nLaunch Notepad\nEnter some text.\nClose Notepad without saving\n\nWhen I close notepad using self.driver.close_app() call, it doesn't close it, since there is unsaved text in the notepad window. How can I perform this task without it prompting me to close the Window OR do I need to automate clicking on Don't Save button which will close the app?","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":923,"Q_Id":53743877,"Users Score":0,"Answer":"You can try self.driver.quit()\nOR\nAutomate the Don't save button.","Q_Score":0,"Tags":"python,appium,winappdriver","A_Id":53845232,"CreationDate":"2018-12-12T13:14:00.000","Title":"Python + Appium + Winappdriver + Notepad: self.driver.close_app() doesnt close NotePad","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm extracting C struct layout from and executable using gdb-python.\nI manage to get all the fields, offsets, types & sizes.\nStill, when trying to re-generate the struct's code, I do not have any indication for whether it was marked with GCC's attribute((__packed__)).\nIs there any way to get this information from the executable? (preferably using gdb-python, but any other way will do too)","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":100,"Q_Id":53748049,"Users Score":1,"Answer":"Is there any way to get this information from the executable?\n\nNo, but you should be able to deduce this with a simple heuristic:\n\nif sizeof(struct foo) is greater than the sum of its member field sizes, the struct is not packed.\nif sizeof(struct foo) is equal to the sum of its member field sizes, the struct is either packed, or its members are naturally aligned with no holes, and packing doesn't matter for it.","Q_Score":0,"Tags":"gcc,gdb,gdb-python,pahole","A_Id":53748768,"CreationDate":"2018-12-12T17:08:00.000","Title":"Determining whether a C struct is packed or not","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Today i tried to create a docker of the final version of my project(my project has a size of 3.2 Go) with the command \"docker build --tag my-python-app\". I had several problems during the manipulation : i ran the command docker. it several times because in the file \"Dockerfile\", i specified the wrong python and wrong pip. Anyway, now i have \"no space left on device\" and my screen is blinking.\nFor the moment, I tried an autoremove, but still not enough space. \nSomeone has an idea of what is happening?","AnswerCount":3,"Available Count":3,"Score":1.2,"is_accepted":true,"ViewCount":47,"Q_Id":53783373,"Users Score":0,"Answer":"I found the problem:\nWhen you build your docker, and this print an error, it doesn't delete intermediate containers created in the folder \/var\/lib\/docker\/aufs\/diff (my error was in the dockerfile, where i precised the wrong python and the wrong pip), and this folder is saved in the peripherical part of the memory. So if you take all the memory, your computer is full of bug (screen, keyword, ...) and you can only use your terminal.\nTo resolver the problem you have to delete these folders","Q_Score":2,"Tags":"python,docker,ubuntu","A_Id":53870146,"CreationDate":"2018-12-14T16:17:00.000","Title":"cannot restart correctly ubuntu after use docker python \"no space left on device\" , no memory available on peripheric","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Today i tried to create a docker of the final version of my project(my project has a size of 3.2 Go) with the command \"docker build --tag my-python-app\". I had several problems during the manipulation : i ran the command docker. it several times because in the file \"Dockerfile\", i specified the wrong python and wrong pip. Anyway, now i have \"no space left on device\" and my screen is blinking.\nFor the moment, I tried an autoremove, but still not enough space. \nSomeone has an idea of what is happening?","AnswerCount":3,"Available Count":3,"Score":0.0,"is_accepted":false,"ViewCount":47,"Q_Id":53783373,"Users Score":0,"Answer":"Run docker image ls to see if you have any images that you can delete to free up space.\nIf you find images that you do not need, you can remove them individually or all at once.  Run docker image prune -h to display the options for removing images.","Q_Score":2,"Tags":"python,docker,ubuntu","A_Id":53783461,"CreationDate":"2018-12-14T16:17:00.000","Title":"cannot restart correctly ubuntu after use docker python \"no space left on device\" , no memory available on peripheric","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Today i tried to create a docker of the final version of my project(my project has a size of 3.2 Go) with the command \"docker build --tag my-python-app\". I had several problems during the manipulation : i ran the command docker. it several times because in the file \"Dockerfile\", i specified the wrong python and wrong pip. Anyway, now i have \"no space left on device\" and my screen is blinking.\nFor the moment, I tried an autoremove, but still not enough space. \nSomeone has an idea of what is happening?","AnswerCount":3,"Available Count":3,"Score":0.1973753202,"is_accepted":false,"ViewCount":47,"Q_Id":53783373,"Users Score":3,"Answer":"Have you tried to remove unused Docker images or containers?\nYou can see the list of images by running:\ndocker images\nAnd you can remove them like:\ndocker rmi <id>\nThe process is fairly similar for the containers:\ndocker ps -a\nAnd:\ndocker rm <id>\nBe careful not to remove used containers or images.","Q_Score":2,"Tags":"python,docker,ubuntu","A_Id":53783442,"CreationDate":"2018-12-14T16:17:00.000","Title":"cannot restart correctly ubuntu after use docker python \"no space left on device\" , no memory available on peripheric","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"i installed Raspbian on my Raspberry Pi and it has Python 3 IDLE to write code. What confuses me is, that if i execute \"python\" in the command of my Raspberry Pi, it says the Python version is 2.7?\nCan someone help?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":676,"Q_Id":53788686,"Users Score":2,"Answer":"As long as it won't cause you any issues, you can try running python3. If you have Python 2 and 3 installed, from my experience python usually runs Python 2, so I guess you'll have to be specific.","Q_Score":0,"Tags":"python,raspberry-pi,python-idle","A_Id":53788695,"CreationDate":"2018-12-15T01:00:00.000","Title":"Python 3 IDLE (Shell) but only Python 2.7 installed on Raspberry Pi?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm trying to get tesserocr python library to run on 4 cores. According to tesseract docs, I understand it supports up to 4 cores. I have a tesserocr python3.x job running inside AWS Batch (docker container based on amazonlinux:latest image) on a c4.x2large instance which has 8 vCPUs, all were allocated to the batch job at submission time.\nThe benchmarks show CPU at 30% max, i.e. 2.5 vCPUs i.e. about 1.25 physical cores (each 2 vCPUs are roughy 1 physical core).\nI've also tried the OMP_NUM_THREADS=4, OMP_THREAD_LIMIT=4 environment variables (based on some forum online), but no value had any effect on performance whatsoever.\nHow do I can tesserocr to scale up to all 4 cores (8 vCPUs)?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":406,"Q_Id":53806553,"Users Score":0,"Answer":"Python Threads are not 1:1 with vCPUs \/ Cores.\nIf you look at the specifications for a c4.x2large instance, it says you can run up to 2 threads per core. And that machine has 8 vCPUs.\nTo potentially use all 8 vCPUs you could try setting OMP_NUM_THREADS=16, OMP_THREAD_LIMIT=16. However how the underlying tesserocr is implemented will have a huge impact on how well it scales within the context of the machine.","Q_Score":0,"Tags":"docker,amazon-ecs,python-tesseract,aws-batch","A_Id":53859480,"CreationDate":"2018-12-16T21:17:00.000","Title":"Why python tesserocr not using 4 CPU cores on AWS Batch?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I've been using the kubectl to upload Airflow workflows to the kubernetes (\/usr\/local\/airflow\/dags) manually. It is possible to do this without using the kubectl? by using a python script? or something else? If it's possible would you be able to share your source? or your python script? Thanks, Appreciate","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":618,"Q_Id":53818844,"Users Score":1,"Answer":"This totally depends on your setup. E.G. We use AWS and so we have the DAGs syncing from an S3 bucket path every 5 minutes. We just put dags into S3. I see that some Kubernetes setups use a kind of shared volume defined by a git repository, that might also work. Airflow itself (the webserver(s), worker(s), nor scheduler) does not offer any hook to upload into the DAG directory.","Q_Score":0,"Tags":"python,kubernetes,workflow,airflow,kubectl","A_Id":53831610,"CreationDate":"2018-12-17T16:03:00.000","Title":"How to upload the Airflow dags(workflows) without going through kubectl?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am using python in linux and tried to use command line to print out the output log while redirecting the output and error to a txt.file. However, after I searched and tried the methods such as \npython [program] 2>&1 | tee output.log\nBut it just redirected the output the the output.log and the print content disappeared. I wonder how I could print the output to console while save\/redirect them to output.log ? It would be useful if we hope to tune the parameter while having notice on the output loss and parameter.","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":125,"Q_Id":53825380,"Users Score":0,"Answer":"You can create a screen like this: screen -L and then run the python script in this screen which would give the output to the console and also would save it the file: screenlog.0. You could leave the screen by using Ctrl+A+D while the script is running and check the script output by reattaching to the screen by screen -r. Also, in the screen, you won't be able to scroll past the current screen view.","Q_Score":0,"Tags":"python,linux","A_Id":53825451,"CreationDate":"2018-12-18T01:57:00.000","Title":"Print output to console while redirect the output to a file in linux","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I can find that spyder.exe is open based on its pid from tasklist, but is there a way to find if the application is idle or any operation such a script is being run inside Spyder or any other Python IDE","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":2527,"Q_Id":53829284,"Users Score":0,"Answer":"I think after (.)py file created its difficult to identify   in which IDE the file created.","Q_Score":0,"Tags":"python,task","A_Id":61124671,"CreationDate":"2018-12-18T08:49:00.000","Title":"How to know if a script is running in Spyder or any other Python IDE?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"If python 3 is stable and Centos 7 is a modern version, why not include it in the official repositories as well as python 2?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":81,"Q_Id":53836616,"Users Score":1,"Answer":"CentOS 7 ships with Python 2 as it is a critical part of the CentOS base system. Python 3 must be installed alongside Python 2 through the CentOS SCL so that default system tools continue to work properly.","Q_Score":1,"Tags":"python-3.x,centos7","A_Id":53836941,"CreationDate":"2018-12-18T15:48:00.000","Title":"Why Redhat does not include python 3 in centos 7?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"when I used or write a 3rd party library of python, I want import it in my code file.\nIn linux set environment variable $PYTHONPATH and works well.\nBut in Windows, After setting environment variable PYTHONPATH and rebooting,it didn't work. Especially in PyCharm terminal.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":106,"Q_Id":53844036,"Users Score":1,"Answer":"If your question is specific to PyCharm, I recommend either installing the package into the virtual environment \/ interpreter you're using for the project from File - Settings - Project: name - Project Interpreter or adding the library to your project and setting the folder to be recognised as a source folder by PyCharm.\nRight-click the library folder, then select Mark Directory as - Sources Root","Q_Score":0,"Tags":"python,environment-variables,pythonpath","A_Id":53844083,"CreationDate":"2018-12-19T03:08:00.000","Title":"set PYTHONPATH enviroment varable for library, but can not import in windows","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I've a machine learning application which uses flask to expose api(for production this is not a good idea, but even if I'll use django in future the idea of the question shouldn't change).\nThe main problem is how to serve multiple requests to my app. Few months back celery has been added to get around this problem. The number of workers in celery that was spawned is equal to the number of cores present in the machine. For very few users this was looking fine and was in production for some time.\nWhen the number of concurrent users got increased, it was evident that we should do a performance testing on it. It turns out: it is able to handle 20 users for 30 GB and 8 core machine without authentication and without any front-end. Which is not looking like a good number.\nI didn't know there are things like: application server, web server, model server. When googling for this problem: gunicorn was a good application server python application.\n\nShould I use gunicorn or any other application server along with celery and why\nIf I remove celery and only use gunicorn with the application can I achieve concurrency. I have read somewhere celery is not good for machine learning applications.\nWhat are the purposes of gunicorn and celery. How can we achieve the best out of both.\n\nNote: Main goal is to maximize concurrency. While serving in production authentication will be added. One front-end application might come into action in between in production.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":2205,"Q_Id":53845434,"Users Score":9,"Answer":"There is no shame in flask. If in fact you just need a web API wrapper, flask is probably a much better choice than django (simply because django is huge and you'd be using only a fraction of its capability).\nHowever, your concurrency problems are apparently stemming from the fact that you are doing some heavy-duty processing for each request. There is simply no way around that; if you require a certain amount of computational resources per request, you can't magic those up. From here on, it's a juggling act.\n\nIf you want a guaranteed response immediately, you need to have as many workers as potential simultaneous requests. This may involve load balancing over multiple servers, if you can't scrounge up enough resources on one server. (cue gunicorn, a web application server, responsible for accepting connections and then distributing them to multiple application processes.)\nIf you are okay with not getting an immediate response, you can let stuff queue up. (cue celery, a task queue, which worker processes can use to retrieve the next thing to be done, and deposit results). This works best if you don't need a response in the same request-response cycle; e.g. you submit a job from client, and they only get an acknowledgement that the job has been received; you would need a second request to ask about the status of the job, and possibly the results of the job if it is finished.\nAlternately, instead of Flask you could use websockets or Tornado, to push out the response to the client when it is available (as opposed to user polling for results, or waiting on a live HTTP connection and taking up a server process).","Q_Score":4,"Tags":"python,concurrency,celery,gunicorn","A_Id":53845615,"CreationDate":"2018-12-19T06:05:00.000","Title":"gunicorn and\/or celery: What is the way get the best out of both?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I have a python script which included some bash commands in os.system() method .\nIf I convert this python script to exe using Pyinstaller,  will this exe file work properly in windows OS or will I face any issues since Windows can't run bash commands ?\nthe bash commands include pdftk utility.\n Example : pdftk input_pdf output output_pdf userpw password\nShould I install pdftk utility also in Windows.\nWhat should I do or install to make it work in Windows ?\nPlease help me..\nThank you","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":463,"Q_Id":53863036,"Users Score":0,"Answer":"It probably will not work, from what I have seen when using bash commands inside of code on windows. \nSolutions:\n\nChange the commands to commands that work on Windows.\nUse some kind of python api (if you know of one post it in the comments and I will put it here.) that allows you to use the commands you need.\nSimply run the script using the bash terminal on windows, but you won't be able to make it a exe as far as I know.","Q_Score":1,"Tags":"python,windows,bash,pyinstaller,pdftk","A_Id":53863097,"CreationDate":"2018-12-20T05:46:00.000","Title":"I have python script which included some bash commands in os.system(). Will this work in Windows?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a python script which included some bash commands in os.system() method .\nIf I convert this python script to exe using Pyinstaller,  will this exe file work properly in windows OS or will I face any issues since Windows can't run bash commands ?\nthe bash commands include pdftk utility.\n Example : pdftk input_pdf output output_pdf userpw password\nShould I install pdftk utility also in Windows.\nWhat should I do or install to make it work in Windows ?\nPlease help me..\nThank you","AnswerCount":2,"Available Count":2,"Score":0.0996679946,"is_accepted":false,"ViewCount":463,"Q_Id":53863036,"Users Score":1,"Answer":"It won't work, os.system is os specific, in Windows it will just spawn a cmd process and try to execute that command and cmd != bash.\nEdit: powershell has a lot of common bash commands implemented on windows, you could try to figure out in the code what os are you running on and if powershell supports your bash commands you could use the subprocess module to spawn powershell processes","Q_Score":1,"Tags":"python,windows,bash,pyinstaller,pdftk","A_Id":53863085,"CreationDate":"2018-12-20T05:46:00.000","Title":"I have python script which included some bash commands in os.system(). Will this work in Windows?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Trying to install python (version 3.7.1) on windows 7, and the installation file appears in my downloads folder. However, when I try to run the installation file, as admin, I get the prompt asking if I want to allow the program to make changes to my computer, which I allow, then the installer window doesn't appear. Nothing happens. I can't find a background program running, nothing. It's like the executable doesn't do anything. I'm really stuck.\nIf it helps I'm using a Windows 7 64-bit computer.","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":1007,"Q_Id":53873807,"Users Score":0,"Answer":"Same problem I also face that you are now facing.\nThe simplest ways to run a python software foundation in windows 7 is.\nFirst completely update your windows 7. It take some minutes and some time Few hours. \nOnce you install windows update.\nThe PYTHON software will run normally.\nAccounting to my experience.","Q_Score":0,"Tags":"python,python-3.x,installation","A_Id":53873964,"CreationDate":"2018-12-20T17:55:00.000","Title":"Python Not Installing on Windows 7 - The Installer Won't Even Appear","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"When executing \"Run Selection\/Line in Python Terminal\" command in VSCode, terminal's current working directory is the workspace root directory. How can we set current directory of terminal to the current file's directory when running the selection\/line?","AnswerCount":7,"Available Count":2,"Score":1.0,"is_accepted":false,"ViewCount":23066,"Q_Id":53900141,"Users Score":25,"Answer":"In \"User Settings\", use the search bar to look for \"python.terminal.executeInFileDir\" and set (=) its value to \"true\" instead of \"false\".","Q_Score":27,"Tags":"python,visual-studio-code,vscode-settings","A_Id":56091981,"CreationDate":"2018-12-22T23:47:00.000","Title":"How to run python interactive in current file's directory in Visual Studio Code?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"When executing \"Run Selection\/Line in Python Terminal\" command in VSCode, terminal's current working directory is the workspace root directory. How can we set current directory of terminal to the current file's directory when running the selection\/line?","AnswerCount":7,"Available Count":2,"Score":0.0285636566,"is_accepted":false,"ViewCount":23066,"Q_Id":53900141,"Users Score":1,"Answer":"you need to go to file\/preferences\/user settings and click the \"{}\" icon at the top right of the window. After that, put this setting in: \"terminal.integrated.cwd\": \"C:\\\\Users\\\\myUser\\\\\", and after that wherever your terminal's directory happens to be. This answer is not the most inaccurate cause im still a noob myself at using vscode so if someone more experienced with it could reply to this thread it would be great.","Q_Score":27,"Tags":"python,visual-studio-code,vscode-settings","A_Id":53900210,"CreationDate":"2018-12-22T23:47:00.000","Title":"How to run python interactive in current file's directory in Visual Studio Code?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"So I am trying to convert a .ui file to a .py file in PyCharm. Whenever I type in the pyuic5 command into the terminal, it returns with \"bash: pyuic5: command not found\".\nI have tried to cd to my project folder, but am still having the same problem. I have already installed the PyQt5 library in PyCharm, so that shouldn't be the problem.\nAny suggestions or ideas would be much appreciated!\nThanks!","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":5849,"Q_Id":53905837,"Users Score":0,"Answer":"Have you installed pyqt5-tools module by pip command?\nIf you have installed this package, you should find pyuic5.exe in your Python36\/Scripts folder(for Windows OS).\nSo please check it first.","Q_Score":0,"Tags":"python,pyqt","A_Id":53908999,"CreationDate":"2018-12-23T17:48:00.000","Title":"How to fix \"pyuic5: command not found\" in terminal","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a python server application that I wish to put onto my server. I have tried to run the python scripts on my server, I moved the file with sftp and I installed the dependancies with pip. No luck, it doesn't use my modules even after I install them. It says the module I installed isn't a thing, when when I run pip again it says it is already there. I read about standalone executables a little, but I only found documentation on windows ones. I know Linux cannot run exe files, but is there something similar. \nAnother thing might be my unfamiliarity with pip. I use the terminal in py charm which automatically puts my pip modules into files. When I do that on my ubuntu machines there is no file created in my directory. (Feels like a problem to me)","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":158,"Q_Id":53918501,"Users Score":0,"Answer":"So I don't want to leave this open in case anyone else see this and needs help. I had forgotten to install my modules, so I did that, and then to run my two programs I just use screen now to host different terminals for each program. It isn't very hard.","Q_Score":0,"Tags":"python,linux,ubuntu,server,executable","A_Id":54282962,"CreationDate":"2018-12-25T00:14:00.000","Title":"Making a python standalone Linux executable on windows","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am new to Celery and I am trying to understand how queues work. If I have two tasks say task1 and task2 and I place them in different queues and on task1 I use only a single worker and on task2 I use multiple works, will task1 only run one at a time since I only have a single worker? and will task2 run as many as many times as I have workers? Is my understanding correct?","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":1310,"Q_Id":53927477,"Users Score":0,"Answer":"task2 will not be executed as many times as you have workers on that queue, this task will be distributed to one of workers that will be available at that moment of time.","Q_Score":1,"Tags":"python,celery,django-celery,celery-task,celerybeat","A_Id":54287760,"CreationDate":"2018-12-26T04:39:00.000","Title":"Celery distributing Queues and Workers","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"When installing packages with sudo apt-get install or building libraries from source inside a python virtual environment (I am not talking about pip install), does doing it inside a python virtual environment isolate the applications being installed? I mean do they exist only inside the python virtual environment?","AnswerCount":2,"Available Count":2,"Score":0.0996679946,"is_accepted":false,"ViewCount":204,"Q_Id":53932357,"Users Score":1,"Answer":"As per the comment by @deceze, virtual environments have no influence over apt operations.\nWhen building from source, any compiled binaries will be linked to the python binaries of that environment. So if your virtualenv python version varies from the system version, and you use the system python (path problems usually), you can encounter runtime linking errors.\nAs for isolation, this same property (binary compatibility) isolates you from system upgrades which might change your system python binaries. Generally we're stable in the 2.x and 3.x, so it isn't likely to happen. But has, and can.\nAnd of course, when building from source inside a virtualenv, installed packages are stashed in that virtualenv; no other python binary will have access to those packages, unless you are manipulating your path or PYTHONPATH in strange ways.","Q_Score":2,"Tags":"python,installation,virtualenv,installation-package","A_Id":53932505,"CreationDate":"2018-12-26T12:49:00.000","Title":"what 'operations' does a python virtual enviornement really isolate?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"When installing packages with sudo apt-get install or building libraries from source inside a python virtual environment (I am not talking about pip install), does doing it inside a python virtual environment isolate the applications being installed? I mean do they exist only inside the python virtual environment?","AnswerCount":2,"Available Count":2,"Score":0.1973753202,"is_accepted":false,"ViewCount":204,"Q_Id":53932357,"Users Score":2,"Answer":"Things that a virtual environment gives you an isolated version of:\n\nYou get a separate PATH entry, so unqualified command-line references to python, pip, etc., will refer to the selected Python distribution. This can be convenient if you have many copies of Python installed on the system (common on developer workstations). This means that a shebang line like #!\/usr\/bin\/env python will \"do the right thing\" inside of a virtualenv (on a Unix or Unix-like system, at least).\nYou get a separate site-packages directory, so Python packages (installed using pip or built locally inside this environment using e.g. setup.py build) are installed locally to the virtualenv and not in a system-wide location. This is especially useful on systems where the core Python interpreter is installed in a place where unprivileged users are not allowed to write files, as it allows each user to have their own private virtualenvs with third-party packages installed, without needing to use sudo or equivalent to install those third-party packages system-wide.\n\n... and that's about it.\nA virtual environment will not isolate you from:\n\nYour operating system (Linux, Windows) or machine architecture (x86).\nScripts that reference a particular Python interpreter directly (e.g. #!\/usr\/bin\/python).\nNon-Python things on your system PATH (e.g. third party programs or utilities installed via your operating system's package manager).\nNon-Python libraries or headers that are installed into a operating system specific location (e.g. \/usr\/lib, \/usr\/include, \/usr\/local\/lib, \/usr\/local\/include).\nPython packages that are installed using the operating system's package manager (e.g. apt) rather than a Python package manager (pip) might not be visible from the the virtualenv's site-packages folder, but the \"native\" parts of such packages (in e.g. \/usr\/lib) will (probably) still be visible.","Q_Score":2,"Tags":"python,installation,virtualenv,installation-package","A_Id":53932762,"CreationDate":"2018-12-26T12:49:00.000","Title":"what 'operations' does a python virtual enviornement really isolate?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a problem with using the rqt_image_view package in ROS. Each time when I type rqt_image_view or rosrun rqt_image_view rqt_image_view in terminal, it will return:  \n\nTraceback (most recent call last):\n    File \"\/opt\/ros\/kinetic\/bin\/rqt_image_view\", line 16, in \n      plugin_argument_provider=add_arguments))\n    File \"\/opt\/ros\/kinetic\/lib\/python2.7\/dist-packages\/rqt_gui\/main.py\", line 59, in main\n      return super(Main, self).main(argv, standalone=standalone, plugin_argument_provider=plugin_argument_provider, plugin_manager_settings_prefix=str(hash(os.environ['ROS_PACKAGE_PATH'])))\n    File \"\/opt\/ros\/kinetic\/lib\/python2.7\/dist-packages\/qt_gui\/main.py\", line 338, in main\n      from python_qt_binding import QT_BINDING\n  ImportError: cannot import name QT_BINDING\n\nIn the \/.bashrc file, I have source :\n\nsource \/opt\/ros\/kinetic\/setup.bash\n  source \/home\/kelu\/Dropbox\/GET_Lab\/leap_ws\/devel\/setup.bash --extend\n  source \/eda\/gazebo\/setup.bash  --extend\n\nThey are the default path of ROS, my own working space, the robot simulator of our university. I must use all of them. I have already finished many projects with this environmental variable setting. However, when I want to use the package rqt_image_view today, it returns the above error info.\nWhen I run echo $ROS_PACKAGE_PATH, I get the return:\n\n\/eda\/gazebo\/ros\/kinetic\/share:\/home\/kelu\/Dropbox\/GET_Lab\/leap_ws\/src:\/opt\/ros\/kinetic\/share\n\nAnd echo $PATH\n\n\/usr\/local\/cuda\/bin:\/opt\/ros\/kinetic\/bin:\/usr\/local\/cuda\/bin:\/usr\/local\/cuda\/bin:\/home\/kelu\/bin:\/home\/kelu\/.local\/bin:\/usr\/local\/sbin:\/usr\/local\/bin:\/usr\/sbin:\/usr\/bin:\/sbin:\/bin:\/usr\/games:\/usr\/local\/games:\/snap\/bin\n\nThen I only source the  \/opt\/ros\/kinetic\/setup.bash ,the rqt_image_view package runs!!\nIt seems that, if I want to use rqt_image_view, then I can not source both \/opt\/ros\/kinetic\/setup.bash and \/home\/kelu\/Dropbox\/GET_Lab\/leap_ws\/devel\/setup.bash at the same time.\nCould someone tell me how to fix this problem? I have already search 5 hours in google and haven't find a solution.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":547,"Q_Id":53937342,"Users Score":0,"Answer":"Different solutions to try:\n\nIt sounds like the first path \/eda\/gazebo\/ros\/kinetic\/share or \/home\/kelu\/Dropbox\/GET_Lab\/leap_ws\/src has an rqt_image_view package that is being used. Try to remove that dependency.\nHave you tried switching the source files being sourced? This depends on how the rqt_image_view package was built, such as by source or through a package manager. \n\nInitially, it sounds like there is a problem with the paths being searched or wrong package being run since the package works with the default ROS environment setup.","Q_Score":0,"Tags":"python,linux,bash,ubuntu,ros","A_Id":54034106,"CreationDate":"2018-12-26T21:26:00.000","Title":"How can I source two paths for the ROS environmental variable at the same time?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I tried to make a python virtualenvironment using virtualenv in \nI type virtuelenv env --python=python3 \nI get an error\nPermissionError: [Errno 1] Operation not permitted: '\/mnt\/d\/venv\/bin\/python3'\nSo I used the command with sudo and therefore type sudo virtualenv env --python=python3\nThe command works this time, now I activate the environment and try to install something using pip, I get\nCould not install packages due to an EnvironmentError: [Errno 1] Operation not permitted\nI know for a fact that if use pip with sudo, it will install packages for the global site packages and no the site packages of the virtual environment. I want to install things to the virtual environment. \nI am running ubuntu bionic on WSL, I used to run ubuntu xenial and didn't face this problem. \nplease advise.","AnswerCount":1,"Available Count":1,"Score":0.6640367703,"is_accepted":false,"ViewCount":3113,"Q_Id":53941490,"Users Score":4,"Answer":"When using WSL: Create the venv in the Linux hierarchy, not the Windows hierarchy. \nTypically this means creating in \/home\/YOUR_USER\/ instead of \/mnt\/....","Q_Score":4,"Tags":"python,virtualenv,sudo,windows-subsystem-for-linux,ubuntu-18.04","A_Id":60889304,"CreationDate":"2018-12-27T07:43:00.000","Title":"`Could not install packages due to an EnvironmentError: [Errno 1] Operation not permitted` in the virtual envinronment","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to package my project with a virtual env so that it is easier to implement. \nI am trying to do this in a Ubuntu bash.\nI have succesfully created a Python venv using the Python virtualenv library. \nI do manage to activate it using source venv_name\/bin\/activate.\nI can indeed see (venv_name) at the beginning of my command line.\nHowever, I do not manage to actually use this virtual environment. \nI have for proof that when I type which python3 I get my root python3; and I have tried to update a package in the virtualenv but it has been updated in the root python. \nWhat should I do to actually use my virtual env ? For now I am trying:\npython3 myscript.py\nAnd it is working but I suspect it's running with my root python3.","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":191,"Q_Id":53973748,"Users Score":2,"Answer":"I think you have two versions of python (2 and 3). You create virtualenv with python 2. Recreate virtualenv with correct python version","Q_Score":1,"Tags":"python,ubuntu,virtualenv","A_Id":53973825,"CreationDate":"2018-12-29T22:15:00.000","Title":"How to use a Python virtual env in my Ubuntu bash?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I want to edit some of the modules I installed for Python 3. I went to \/Library\/Python and the only folder I found was 2.7. This is not the folder Python 3 runs on. I tested this by installing a module in the Python 2.7 folder by using pip and trying to run it in python 3 (it does not work). Where is the folder?\nI use macOS","AnswerCount":2,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":1511,"Q_Id":53977536,"Users Score":0,"Answer":"Go into the terminal app, and type which python3. This will output the path where python3 is located.\nBut as Daniel says in a comment, it's really not recommended to edit anything in modules that you install.","Q_Score":0,"Tags":"python,macos","A_Id":53977609,"CreationDate":"2018-12-30T12:20:00.000","Title":"Python 3.7.2 folder cannot be located in \/Library\/Python","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I want to edit some of the modules I installed for Python 3. I went to \/Library\/Python and the only folder I found was 2.7. This is not the folder Python 3 runs on. I tested this by installing a module in the Python 2.7 folder by using pip and trying to run it in python 3 (it does not work). Where is the folder?\nI use macOS","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":1511,"Q_Id":53977536,"Users Score":0,"Answer":"I just figured it out. The path is \/Library\/Frameworks\/Python.framework\/Versions\/3.7\/lib\/python3.7\/site-packages\nAlternatively, type this into terminal:\n find \/ -name (INSERT NAME OF MODULE)","Q_Score":0,"Tags":"python,macos","A_Id":53978381,"CreationDate":"2018-12-30T12:20:00.000","Title":"Python 3.7.2 folder cannot be located in \/Library\/Python","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"For some reason, pip just isn't installed after installing Python 2.7.15 on Windows. I know that I had the option to install pip checked. I'm using the default path, \"C:\\Python27\". This is the error I keep receiving: 'pip' is not recognized as an internal or external command,operable program or batch file.\nCould someone offer guidance?\nEDIT: There is no Scripts subfolder in my Python27 folder for some reason","AnswerCount":4,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":3319,"Q_Id":53983123,"Users Score":0,"Answer":"Please check:\n\npip.exe in C:\\Python27\\Scripts\n\"C:\\Python27\\Scripts\" in your Path environment variables","Q_Score":0,"Tags":"python,windows,python-2.7,pip","A_Id":53983154,"CreationDate":"2018-12-31T02:50:00.000","Title":"Pip is not installed after downloading Python 2.7.15 on Windows","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"For some reason, pip just isn't installed after installing Python 2.7.15 on Windows. I know that I had the option to install pip checked. I'm using the default path, \"C:\\Python27\". This is the error I keep receiving: 'pip' is not recognized as an internal or external command,operable program or batch file.\nCould someone offer guidance?\nEDIT: There is no Scripts subfolder in my Python27 folder for some reason","AnswerCount":4,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":3319,"Q_Id":53983123,"Users Score":0,"Answer":"I installed Python2.7.18, and Scripts directory wasn't there.\nI just run:\nMyPython2.7Dir\\python.exe -m ensurepip\nThat was all. Now I have the Scripts directory and pip installed as usual.","Q_Score":0,"Tags":"python,windows,python-2.7,pip","A_Id":66305604,"CreationDate":"2018-12-31T02:50:00.000","Title":"Pip is not installed after downloading Python 2.7.15 on Windows","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm trying to create workflow in Python that will have the following features below:\n\n\nDynamic scheduling.\nParallelism - many threads within one process.\nRunning a flow same as running a task.\nWorks on Windows.\n\n\nFrom the knowledge that i get it's seems that 1) & 3) are achievable in many workflow frameworks, but 2) is not that easy. In my research i was mostly looked at Celery & Luigi frameworks.\n\nFor Celery I did found out that 2 could be done using the --pool argument, so I would like to know if I can combine the worker & the trigger to the same python module?\nFor Luigi I would like to know if it's possible to run tasks as multi-threads and not multi-processes?\n\nIn addition I would appreciate any suggestions for other Python framework that could help me before I start to create my own workflow?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":874,"Q_Id":54012328,"Users Score":0,"Answer":"In luigi, it is possible for the tasks themselves to use multithreading, but in luigi each worker will itself be a process, as it can run on a different machine. You could run with just one worker if you have something against having two processes.\nAnother one to look at is airflow.","Q_Score":0,"Tags":"python,frameworks,celery,workflow,luigi","A_Id":54027527,"CreationDate":"2019-01-02T19:51:00.000","Title":"Workflow framework in Python","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a scenario to pass the processing file names between the DAG's which is used for loading my data. Is there any functionality for the same in airflow? I hope that XCOM allows only passing file names between tasks in the same DAG.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":1089,"Q_Id":54020319,"Users Score":0,"Answer":"I was able to implement it using below options in the operator.\npython_callable=conditionally_trigger,\nparams={\"condition_param\": True, \"message\": \"filename\"},","Q_Score":0,"Tags":"python-3.x,airflow","A_Id":54089296,"CreationDate":"2019-01-03T10:20:00.000","Title":"Pass a value from one DAG to another DAG in Apache Airflow","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to set an environment variable in Jenkins that I want my python script in Github to use. I can access variables once they're not a collection but i would like to set a collection variable. In this case, a list.\nI have a list variable like:\nlist = [\"item1\",\"item2\"]\nWhen i try to print it from Jenkins using: \nprint(os.environ['list']) it prints the whole list as a single string and using print(type(os.environ['list'])) prints \"string\".","AnswerCount":2,"Available Count":1,"Score":-0.0996679946,"is_accepted":false,"ViewCount":1678,"Q_Id":54026662,"Users Score":-1,"Answer":"Create a string variable in jenkins and then use str.split() in the python script to make a list.\nIn Jenkins: jenkinslist = item1 item2 item3\nIn Github\/python: pythonlist = os.environ['jenkinslist'].split()","Q_Score":0,"Tags":"python,list,jenkins","A_Id":54027239,"CreationDate":"2019-01-03T17:01:00.000","Title":"Python list as environment variable in Jenkins","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I write a program in python3.6 under PyCharm in Ubuntu 18.04\nI want to pop up a jpg-file on specific window-coordinates. The only possible way to do this seems to be usage of eog and wmctrl.\nI did not find an imageviewer, who is able to position the jpg-file exatly where i want (not eog, qiv, ..or others, they miss these options) \nSo I use \neog filename.jpg to pop ist up.\nThen the wmctrl-command to place it on the screen\nDoing on console in unix(Ubuntu):\neog filename.jpg -->   eog pops it up centered.\nwmctrl -a filename.jpg -e 0,10,0,600,2000  --> places it, where I want\n(It doesn't matter from which directory I call eog, it also can be with directory \/home\/user\/......(filename.jpg). For wmctrl in each case only filename.jpg is sufficent. (Also \"wmctrl -r filename.......  works)\nDoing the same from Pythone-console, it works perfectly, too.\nBut: when I do the some from programcode with\ncmd = \"eog filename.jpg\"\nos.system(cmd)  (or os.system(\"cmd\"), pop-up of the file centered on the screen works\nBUT:\ncmd = \"wmctrl -a filename.jpg -e 0,10,0,600,2000\" \nos.systems(cmd)  -------> nothing happens, as if the os.system() command is ignored\nAny idea, what could be wrong is appreciated  !\n(I first thought, I run into problems with filename and specific characters, but it also happens with simple names like test.jpg or so.)\non Python-console i also use \ncmd =...........   and\nos.system(cmd) after \"import os\"","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":81,"Q_Id":54030399,"Users Score":0,"Answer":"Sorry: I solved it by myself.\nIt only needs a pause before the wmctrl-command is fired !\nimport time\ntime.sleep(2)      does the job (may be, 1 second also is enough)\n(doing it on the console, through typing you get the pause automatically)","Q_Score":1,"Tags":"python,ubuntu,os.system,wmctrl","A_Id":54031064,"CreationDate":"2019-01-03T22:01:00.000","Title":"difference command in python3 console and python3 program code","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a remote Linux host(I'm not superuser) which can only communicate with my local host via ssh shell.\n\nmy remote host has NO Internet, but has python3.6.5, conda4.5.4 installed.\nmy local host has Internet and can install packages and python through the Internet.\n\nI need to run my python2.7 code on a remote host, but the python2.7 virtual environment and the related dependent packages are lacked. \nI want to configure a py2.7 environment(my_py2env) and install all the needed dependencies on my localhost. And package all the needed file into a pack, such as tar.gz package. Send it to my remote host and unpack it. If I can use some conda commands such as conda --clone and this deploys all my environment(my_py2env) on the remote host. That will be perfect. Is that possible? How can I realize it?\nThank you very much!","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":164,"Q_Id":54039738,"Users Score":1,"Answer":"I think there may be you can use ssh command with options -R to map a local port to the remote host, and you can setup a http proxy on your local machine and listen on the mapped port.\nNow you can install required package in a virtualenv via the http proxy you mapped.","Q_Score":1,"Tags":"python,ssh,conda","A_Id":54039853,"CreationDate":"2019-01-04T13:20:00.000","Title":"How to share a total python env with a remote host without Internet?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a python project that I am about to finish.\nAll its dependencies and packages are provided in my venv that sits next to my app (as it should). The project was developed through the venv. As expected.\nMy question is:\nIf I hand in my project and include the venv folder, will the user be able to run my program through the venv that I have provided?\nIn other words, if I instruct them to execute: path\\to\\my\\venv\\python.exe path\\to\\my\\app.py, will it just work?\nIs this a thing?\nOptional bonus question: I'm on Windows. Assuming that my program is platform-independent, will this approach work if they're on linux? (I doubt it...)\nThanks.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":36,"Q_Id":54043168,"Users Score":1,"Answer":"After Endyd and Kenny Ostrom's comments, and some research, I'm aswering my own question for future readers.\nVirtual environments are not designed for this sort of task. There is no guarantee that a venv will work properly after being transferred to another system.\nThe commonly used method is, rather, using pip to create a \"requirements.txt\" of your project via pip freeze > requirements.txt.\nThe user will then create their own venv, and use pip install -r requirements.txt to sync their venv with yours.\nIf what you want is an executable, there are certain tools like PyInstaller that you can look into.","Q_Score":0,"Tags":"python,windows,python-venv","A_Id":54044560,"CreationDate":"2019-01-04T16:59:00.000","Title":"Handing in my application, along with its virtual environment","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I work in Python, and I want to find a workflow for enabling two processes (main-process and sub-process) to communicate with each other. By that, I mean the ability of main-process to send some data to sub-process (perhaps, by writing to sub-process's stdin) and the ability of sub-process to send some data back to the main one. This also implies that both can read the data sent to them (I was thinking of reading from stdin).\nI was trying to use subprocess library, but it seems that it's intended to work with processes that are designed to give an output only once and then terminate, whereas I want to exchange data dynamically and shut the sub-process down only when such a command is received.\nI've read lots of answers here on StackOverflow tackling problems closely related to mine, but none of them did I find satisfying, as the questions those answers were meant to were different from mine in one important detail: I need my main-process to be able to exchange data with its sub-process dynamically as many times as needed, not just once, which in turn implies that the sub-process should run until it receives a certain command from main-process to terminate. \nI'm open to using third-party libraries, but it would be much better if  you proposed a solution based solely on the Python Standard Library.","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":3530,"Q_Id":54060274,"Users Score":5,"Answer":"You want to make a Popen object with subprocess.PIPE for standard input and output and use its file objects to communicate\u2014rather than using one of the cantrips like run (and the older, more specific ones like check_output).  The challenge is avoiding deadlock: it\u2019s easy to land in a situation where each process is trying to write, the pipe buffers fill (because no one is reading from them), and everything hangs.  You also have to remember to flush in both processes, to avoid having a request or response stuck in a file object\u2019s buffer.\nPopen.communicate is provided to avoid these issues, but it supports only a single string (rather than an ongoing conversation).  The traditional solution is select, but it also works to use separate threads to send requests and read results.  (This is one of the reasons to use CPython threads in spite of the GIL: each exists to run while the other is blocked, so there\u2019s very little contention.)  Of course, synchronization is then an issue, and you may need to do some work to make the multithreaded client act like a simple, synchronous function call on the outside.\nNote that both processes need to flush, but it\u2019s enough if either implements such non-blocking I\/O; one normally does that job in the process that starts the other because that\u2019s where it\u2019s known to be necessary (and such programs are the exception).","Q_Score":15,"Tags":"python,python-3.x,subprocess","A_Id":54063928,"CreationDate":"2019-01-06T09:35:00.000","Title":"Dynamic communication between main and subprocess in Python","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I tried to setup cx_oracle latest version for connecting to a remote oracle installation. I was able to connect to oracle and import data on my local installation on Ubuntu. But When i tried the same thing on an AWS server redhat instance it fails and throws a connection timeout issue.\nI am using python 3.5 and cx_oracle 7.0 setup oracle instant client on \/opt\/ and exported the LD_LIBRARY_PATH also tried same with sqlalchemy connector with cx_oracle.\nI even tried installing using rpm but still shows the same issue in server\nplease guide me if am doing anything wrong","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":51,"Q_Id":54072172,"Users Score":0,"Answer":"I need to close this question since the issue was not with the library it was the oracle instance which has a inbound policy for a specific ip","Q_Score":0,"Tags":"database,python-3.x,oracle,amazon-web-services,cx-oracle","A_Id":54074372,"CreationDate":"2019-01-07T10:03:00.000","Title":"Cx_Oracle connection issue Redhat","Data Science and Machine Learning":0,"Database and SQL":1,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have an automation task that uses pyautogui and python3 to open a pdf and fill it out with predefined fields from JIRA (The pdf is locked down and there is no way to programatically interface with it other than pyautogui.) The script snaps to the top left of a screen where a pdf is opened, clicks in the pdf and then keystrokes are automated from there.\nAll of this works great on a desktop but now its time to put this on a server where it will run and the best option to deploy looks like Docker. Is what I'm suggesting possible or is there another method that will work like a docker-machine or VM ? This is my first deployment and it's small enough to really mess around with all possible options and do some good learning.","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":1271,"Q_Id":54099863,"Users Score":0,"Answer":"Figured it out! Built a container that uses xvfb and simulates the x11 session. Just need to set DISPLAY variable and create a session.","Q_Score":0,"Tags":"python-3.x,docker,virtual-machine,centos7,pyautogui","A_Id":55330012,"CreationDate":"2019-01-08T21:18:00.000","Title":"is it possible to run pyautogui on centos 7 docker container","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I want AWS Cloud9 to use the Python version and specific packages from my Anaconda Python environment. How can I achieve this? Where should I look in the settings or configuration?\nMy current setup: I have an AWS EC2 instance with Ubuntu Linux, and I have configured AWS Cloud9 to work with the EC2 instance. \nI have Anaconda installed on the EC2 instance, and I have created a conda Python3 environment to use, but Cloud9 always wants to use my Linux system's installed Python3 version.","AnswerCount":4,"Available Count":1,"Score":0.049958375,"is_accepted":false,"ViewCount":2395,"Q_Id":54102477,"Users Score":1,"Answer":"You could use a 'shell script' runner type. To do this you would:\n\ncreate your conda env, with python3 and any packages etc you want in it. Call it py3env\ncreate a directory to hold your runner scripts, something like $HOME\/c9_runner_scripts\nput a script in there called py3env_runner.sh runner with code like:\nconda activate py3env\n python ~\/c9\/my_py3_script.py\nThen create a run configuration with the 'shell script' runner type and enter c9_runner_scripts\/py3env_runner.sh","Q_Score":8,"Tags":"python,amazon-web-services,amazon-ec2,anaconda,aws-cloud9","A_Id":57294696,"CreationDate":"2019-01-09T02:25:00.000","Title":"Configure AWS Cloud9 to use Anaconda Python Environment","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Although I have implemented Virtual Environment inside a project in PyCharm IDE, when I trigger python -m behave it says:\n\n'python' is not recognized as an internal or external command\".  \n\nHow can I make sure that terminal searches the venv folder and not the default python location?\nI made sure that inside settings>tools>Terminal, \"Activate Virtual Environment\" is checked.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":61,"Q_Id":54108544,"Users Score":1,"Answer":"Terminal in PyCharm is still just a system terminal.\nSo you should add your python binarys path to your systems PATH environment variable.\nOr you can use the option \"Environment Variables\" inside settings\/tools\/Terminal and add a new entry there like PATH=$PATH$;< Path to your python binary >\nThen python should launch in PyCharms terminal window.\nBut to access your virtual environment you still need to start it like in a normal terminal: venv\\Scripts\\activate (on Windows).","Q_Score":0,"Tags":"python-3.x,pycharm,virtual-environment","A_Id":54109581,"CreationDate":"2019-01-09T10:56:00.000","Title":"How can I make sure that terminal searches the venv folder and not the default python location for third party modules?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I want to always run a Python script in Windows. Every 5 minutes, it is to check if the script is running and if not, run it.\nIn linux, this can be done using flock and cron job. How can this be done in windows?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":80,"Q_Id":54120345,"Users Score":1,"Answer":"You can use the Task scheduler. Create a new basic task with python as the program and your script as the argument.","Q_Score":1,"Tags":"python,windows","A_Id":54120365,"CreationDate":"2019-01-10T00:18:00.000","Title":"Python cron script for windows","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I wanted to get file's inode in my windows machine, so first I tried os.stat('.\/filename.txt').st_ino\nin my REPL and the output I got was 0L. \nI tried the same for a couple of other files and got the same output.\nThen, I tried\nos.fstat(open(\"filename.txt\", \"r\").fileno()).st_ino and I got a long integer in output. For different files the integer was getting changed. So, I think os.fstat worked for windows while os.stat did not. Can someone explain to me the reason for this behavior and other differences between both?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":430,"Q_Id":54127788,"Users Score":1,"Answer":"In Python 2 on Windows, stat calls GetFileAttributesEx or FindFirstFile to get standard file information, including file attributes (e.g. directory, readonly), size, and timestamps. fstat calls GetFileType (i.e. character, pipe, disk) and GetFileInformationByHandle, which provides the standard info plus the file index number (like an inode in some ways, but not really), number of hard links, and volume serial number (unused). \nPython 2 is a year away from end of life. I suggest you upgrade to Python 3, which has an improved stat implementation for Windows and further improvements in development","Q_Score":0,"Tags":"python,windows,inode,fstat","A_Id":54128641,"CreationDate":"2019-01-10T11:31:00.000","Title":"Difference between inode numbers of os.stat and os.fstat in python","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am using docker compose to create a network of containers, where one of the containers requests another to run a process. The client also has to monitor these process in case of errors or when it completes. My approach is to use python's subprocess Popen like this:\nprocess = subprocess.Popen(cmd,stdout=subprocess.PIPE, stderr=subprocess.STDOUT) \nwhere cmd is ['docker-compose', 'exec', 'service2', 'sh', '-c', 'cp sourcefile  \/destination && python run.py'] \nBut I get this error\n[Errno 2] No such file or directory: 'docker-compose': 'docker-compose'\nI tried executing the same command in bash mode on the client container and got\nbash: docker-compose: command not found. I thought of doing a dind, but is that really necessary? This command works on my host machine docker-compose run --rm service2 python apples.py shell. What's the right approach bearing in mind I need to query the returncode of the process running in container service2 from service1 at anytime. I declared a bridge-network. Thanks","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":2471,"Q_Id":54129377,"Users Score":0,"Answer":"In your command, use the absolute path to the docker-compose executable on your machine.","Q_Score":1,"Tags":"python,bash,docker,ubuntu,docker-compose","A_Id":54129415,"CreationDate":"2019-01-10T13:05:00.000","Title":"docker-compose exec causes [Errno 2] No such file or directory: 'docker-compose': 'docker-compose' in docker container","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a list .txt with input arguments from a python script, I would like to execute the script with each argument in the list in the linux terminal, but only runs the latter.\nI'm trying this:\nfor p in $(cat list.txt); do eval $(echo script.py -u $p); done;","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":71,"Q_Id":54131267,"Users Score":0,"Answer":"there are multiple ways to do it. But my most recommended way would be the first one.\n\nChange your python script to take an argument which is the path to your list.txt. I would suggest using argparse module in python to handle arguments. Once the argument is read, just loop thorugh the contents of the file in python and use them the way you want to. With the you can handle the arguments much better. The program would be more robust.\nYou can run the python script using cat operation on the list.txt. python script.py $(cat list.txt)\nYou can use pipe, grep and awk. python script.py $(grep pattern file | awk '{print}' ORS=' ')\n\nBut I would still suggest the first option. Its more robust, you can handle arguments better and control the errors also.","Q_Score":0,"Tags":"python,linux,shell","A_Id":54132167,"CreationDate":"2019-01-10T14:52:00.000","Title":"How to run a python script with a list of arguments in linux terminal?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"We are using JFrog Artifactory and we keep jar files and tar.gz files into Artifactory. \nWhen we upload a jar file, in Artifactory we are able to expand and see the jar file contents like com -> mycomp -> app ....\nWhen we upload a tar.gz file which contains jar file, we are able to expand the tar.gz file contents but we are not able to expand the jar file.\nWe are using Python to create tar.gz file.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":1165,"Q_Id":54140169,"Users Score":1,"Answer":"this is actually by design of Artifactory. When you're uploading artifacts to Artifactory it will unpack it so you can browse the contents from the repository browser (as you indeed mentioned). \nWhen you're uploading a compressed archive (whether that is a zip or tar.gz or something else), Artifactory doesn't extract the subcomponents. The reason behind that is that zips (or any other archive) could contain many more subcomponents and those could contain many more subcomponents too (and so on). That would place a heavy burden on the Artifactory server by consuming, potentially, tons of resources.","Q_Score":0,"Tags":"python,artifactory","A_Id":54150531,"CreationDate":"2019-01-11T03:52:00.000","Title":"Uploading artifacts to JFrog Artifactory","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I'm setting up Dask Python cluster at work (30 machines, 8 cores each in average). People use only a portion of their CPU power, so dask-workers will be running on background at low priority. All workers are listening to dask-scheduler on my master node. It works perfect if only I who use it, however it's gonna be used by several people in a concurrent manner - so i need to be able to admin this cluster:\n\nAuthenticate users, reject unknowns\nIdentify who submitted which jobs\nRestrict number of submitted jobs per user\nRestrict timeout for computation per job\nKill any job as admin\n\ndask.distributed out of box provides a little of functionality described above. Could you please advice on some solution (may be hybrid Dask + something)?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":101,"Q_Id":54147096,"Users Score":0,"Answer":"Usually people use a cluster manager like Kubernetes, Yarn, SLURM, SGE, PBS or something else.  That system handles user authentication, resource management, and so on.  A user then uses the one of the Dask-kubernetes, Dask-yarn, Dask-jobqueue projects to create their own short-lived scheduler and workers on the cluster on an as-needed basis.","Q_Score":0,"Tags":"python,dask,dask-distributed","A_Id":54777689,"CreationDate":"2019-01-11T13:02:00.000","Title":"Dask.distributed cluster administration","Data Science and Machine Learning":1,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"In a Windows Server machine, python is installed in one account in the following path:\nC:\\Users\\user1\\AppData\\Local\\Programs\\Python\\Python36\nI would like to move the python installation from that account to another account in the C:\/ drive. Since most of the modules are already installed in that Python, I do not like to do a fresh install in the new account.\nI copied the entire installation to the new location and I tried setting the following path in the new account.\nC:\\Python\\Python36\nBut python --version did not work (even after restarting the system).\nWhat do you think I must be doing wrong here?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":972,"Q_Id":54179038,"Users Score":0,"Answer":"Find Python Setup, then uninstall the python.\nReinstall it again, but before the installation do it like this: choose 'Customize Installation' -> Next -> browse -> choose choose your folder, or just tick 'Install for all users' box.","Q_Score":0,"Tags":"python,installation","A_Id":54179505,"CreationDate":"2019-01-14T09:49:00.000","Title":"Is it possible to move python installation from one windows account to another?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"My main OS is windows 10 but I am using cygwin as a terminal. While installing uwsgi through pip3 install uwsgi command , it fails with an error message \" AttributeError: module 'os' has no attribute 'uname'\"","AnswerCount":3,"Available Count":1,"Score":0.0665680765,"is_accepted":false,"ViewCount":2723,"Q_Id":54200746,"Users Score":1,"Answer":"If you get:\ncore\/event.c: In function \u2018event_queue_read\u2019: core\/event.c:1416:9: error: \u2018UWSGI_EVENT_IN\u2019 undeclared\nprobably you don't start setup install with cygwin python","Q_Score":2,"Tags":"python-3.x,windows,cygwin","A_Id":64511336,"CreationDate":"2019-01-15T14:20:00.000","Title":"Can't install uwsgi on cygwin","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a Python virtual environment with a cloned Github repository inside of it. The repository requires me to run a .sh file. I am using GitBash to run the sh setup.sh command. \nWhen I run the .sh file, I get a huge list of \"command not found\" errors which I think are coming from the fact that my GitBash is not operating in the virtual environment which I activated originally. When I type $ source .\/EnvironmentName.env\/bin\/activate into the GitBash, it tells me that there is \"No such file or directory\".\nHow do I activate the original environment in my GitBash window?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":916,"Q_Id":54207064,"Users Score":0,"Answer":"if you are on Windows then \"Scripts\" folder is created instead of \"bin\"\nthen the command should be like this:\n$ source .\/EnvironmentName.env\/Scripts\/activate","Q_Score":2,"Tags":"python,cmd,virtualenv,git-bash","A_Id":57601577,"CreationDate":"2019-01-15T21:27:00.000","Title":"How to get into an active Python Virtual Environment from Git Bash","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a few basic questions on Dask:\n\nIs it correct that I have to use Futures when I want to use dask for distributed computations (i.e. on a cluster)?\nIn that case, i.e. when working with futures, are task graphs still the way to reason about computations. If yes, how do I create them.\nHow can I generally, i.e. no matter if working with a future or with a delayed, get the dictionary associated with a task graph?\n\nAs an edit:\nMy application is that I want to parallelize a for loop either on my local machine or on a cluster (i.e. it should work on a cluster).\nAs a second edit:\nI think I am also somewhat unclear regarding the relation between Futures and delayed computations.\nThx","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":1864,"Q_Id":54232080,"Users Score":16,"Answer":"1) Yup. If you're sending the data through a network, you have to have some way of asking the computer doing the computing for you how's that number-crunching coming along, and Futures represent more or less exactly that.\n2) No. With Futures, you're executing the functions eagerly - spinning up the computations as soon as you can, then waiting for the results to come back (from another thread\/process locally, or from some remote you've offloaded the job onto). The relevant abstraction here would be a Queque (Priority Queque, specifically).\n3) For a Delayed instance, for instance, you could do some_delayed.dask, or for an Array, Array.dask; optionally wrap the whole thing in either dict() or vars(). I don't know for sure if it's reliably set up this way for every single API, though  (I would assume so, but you know what they say about what assuming makes of the two of us...).\n4) The simplest analogy would probably be: Delayed is essentially a fancy Python yield wrapper over a function; Future is essentially a fancy async\/await wrapper over a function.","Q_Score":12,"Tags":"python,distributed-computing,dask","A_Id":54235046,"CreationDate":"2019-01-17T08:51:00.000","Title":"Dask: delayed vs futures and task graph generation","Data Science and Machine Learning":1,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I wonder if there is any problem if I just close the terminal without deactivate. Or when I change the environment, do I need to deactivate the environment I'm working in or I just need to activate other-env.","AnswerCount":2,"Available Count":2,"Score":0.1973753202,"is_accepted":false,"ViewCount":1313,"Q_Id":54302645,"Users Score":2,"Answer":"Closing the window without deactivating should be fine. You can also just activate the new environment without deactivating first.\nThe same goes for virtualenv.","Q_Score":3,"Tags":"python,windows,anaconda","A_Id":54302697,"CreationDate":"2019-01-22T06:47:00.000","Title":"What happened if I don't deactivate environment anaconda?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I wonder if there is any problem if I just close the terminal without deactivate. Or when I change the environment, do I need to deactivate the environment I'm working in or I just need to activate other-env.","AnswerCount":2,"Available Count":2,"Score":0.3799489623,"is_accepted":false,"ViewCount":1313,"Q_Id":54302645,"Users Score":4,"Answer":"There is no problem when you try to close the terminal without deactivate, the activate is only affected within terminal session. \nAnd if you want to change env, just activate it without deactivate the old one","Q_Score":3,"Tags":"python,windows,anaconda","A_Id":54302710,"CreationDate":"2019-01-22T06:47:00.000","Title":"What happened if I don't deactivate environment anaconda?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am on Windows and I am trying to figure how to use Pyinstaller to make a file (on Windows) for a Mac.\nI have no trouble with Windows I am just not sure how I would make a file for another OS on it.\nWhat I tried in cmd was: pyinstaller -F myfile.py and I am not sure what to change to make a Mac compatible file.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":178,"Q_Id":54317780,"Users Score":0,"Answer":"Not Possible without using a Virtual Machine","Q_Score":1,"Tags":"python,python-3.x,pyinstaller","A_Id":54318656,"CreationDate":"2019-01-22T23:09:00.000","Title":"How do I use Pyinstaller to make a Mac file on Windows?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to make a pipeline using Data Factory In MS Azure of processing data in blob storage and then running a python processing code\/algorithm on the data and then sending it to another source.\nMy question here is, how can I do the same in Azure function apps? Or is there a better way to do it?\nThanks in advance.\nShyam","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":757,"Q_Id":54343289,"Users Score":0,"Answer":"I created a Flask API and called my python code through that. And then put it in Azure as a web app and called the blob.","Q_Score":0,"Tags":"python,azure,azure-functions","A_Id":54685275,"CreationDate":"2019-01-24T09:30:00.000","Title":"Python Azure function processing blob storage","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Trying to use Pylint in CMD, verified that it's installed but CMD on Windows 10 says:\n\"Pylint is not recognised as an internal or external command, nor is it an executable program or a command file\".\nPython beginner, using Anaconda3 distribution.\nC:\\Users\\username\\Documents>pylint filename.py","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":890,"Q_Id":54347297,"Users Score":1,"Answer":"You should use Anaconda-Prompt instead of CMD if you have not added the anaconda python to your PATH environment.\nYou can search for Anaconda-Prompt in windows search (Press Windows Key + Q).\nThen you should be able to use pylint, in the command line (within Anaconda-Prompt).","Q_Score":0,"Tags":"python,cmd,pylint","A_Id":54347479,"CreationDate":"2019-01-24T13:01:00.000","Title":"Pylint not found in CMD","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Current Architecture\nOn the most foundation part is Kubernetes with multiple different container images.\nOn top of them, we have a python library which dynamically loads our code, which we write and install on those containers after deployment. \nWe write stateful applications on k8, that's why this kind of architecture.\nLet's call our code beta and the lib which loads it alpha\nThe current process testing new changes it the following:\n\nprovision of a new container with the new installed changed from the artefactory\nrun alpha, which loads beta, which we actively develop\n\nWhat we can do\/ cannot do\n\nno ssh\nall commands of kubectl\nport forwards \nim using OSX, with PyCharm\n\nNow the question:\n\nHow can I start my local IDE and set a breakpoint in beta, which gets loaded after running alpha on the k8 pod -> container","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":582,"Q_Id":54347615,"Users Score":0,"Answer":"For now the possible solution was to do the following:\n- add a remote debugger to the code, which listens upon start\n- port forward the traffic\n- clone the code (install), such that the lib gets run, as soon as you run the main\n- run the code \n- it waits until attach\n- attach to the debugger.\nVoila it works.","Q_Score":1,"Tags":"python,debugging,networking,kubernetes","A_Id":54479020,"CreationDate":"2019-01-24T13:18:00.000","Title":"Debug Python on Kubernetes","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I want to use my script that uses pandas library on another linux machine where is no internet access or pip installed. \nIs there a way how to deliver the script with all dependencies?\nThanks","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":82,"Q_Id":54364440,"Users Score":0,"Answer":"or set needed dependices in script manually by appending sys.modules and pack together all the needed files.","Q_Score":0,"Tags":"python","A_Id":54365941,"CreationDate":"2019-01-25T11:29:00.000","Title":"Deliver python external libraries with script","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a question. I work on Windows  10.\nI done a reinstall of my installed pythons. On my PC i had Python 2.7 and Python 3.6.6. I uninstalled Python 2.7. Then, i reinstalled Python 3.6.6. \nWhen i want to write pip install numpy etc, i get this error:\n\nFatal error in launcher: Unable to create process using '\"c:\\python27\\python.exe\" ...\n\nWhen i deleted that path from system PATH, i still get that error.\npython -m pip install something works, when i type python in cmd i get python 3.6.6 promprt but my question is, can i delete taht error from windows cmd? If i cant, if this error will affect on my compiling, debugging and pythone code working?","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":4593,"Q_Id":54377502,"Users Score":1,"Answer":"There may be many solutions possible for that. One of the simplest is that uninstall the python from Apps & Programs. It will automatically delete all the data and path from the system. Then reinstall the python again. It might be possible that the data of python2.7 must not have been completely deleted from the system and thus throwing errors. Try this solution it'll fix everything.","Q_Score":2,"Tags":"python","A_Id":54377583,"CreationDate":"2019-01-26T10:26:00.000","Title":"Fatal error in launcher: Unable to create process using '\"c:\\python27\\python.exe\"","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm writing my own wraping for ffmpeg on Python 3.7.2 now and want to use it's \"-progress\" option to read current progress since it's highly machine-readable. The problem is \"-progress\" option of ffmpeg accepts as its parameter file names and urls only. But I don't want to create additional files not to setup the whole web-server for this purpose.\nI've google a lot about it, but all the \"progress bars for ffmpeg\" projects rely on generic stderr output of ffmpeg only. Other answers here on Stackoverflow and on Superuser are being satisfied with just \"-v quiet -stats\", since \"progress\" is not very convenient name for parameter to google exactly it's cases.\nThe best solution would be to force ffmpeg write it's \"-progress\" output to separate pipe, since there is some useful data in stderr as well regarding file being encoded and I don't want to throw it away with \"-v quiet\". Though if there is a way to redirect \"-progress\" output to stderr, it would be cool as well! Any pipe would be ok actually, I just can't figure out how to make ffmpeg write it's \"-progress\" not to file in Windows. I tried \"ffmpeg -progress stderr ...\", but it just create the file with this name.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":5064,"Q_Id":54385690,"Users Score":12,"Answer":"-progress pipe:1 will write out to stdout, pipe:2 to stderr. If you aren't streaming from ffmpeg, use stdout.","Q_Score":9,"Tags":"python,windows,ffmpeg","A_Id":54386052,"CreationDate":"2019-01-27T06:38:00.000","Title":"How to redirect -progress option output of ffmpeg to stderr?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Doing a production on EC2, was wondering if it is advisable to start by creating a new user and granting it sudo privileges, since not many people do but I have seen it done","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":34,"Q_Id":54392650,"Users Score":0,"Answer":"Not strictly needed. However, since the username is common and known to everyone, chances are high that someone will be able to access the instance if he comes under the allowed block of IPs and has the pem\/ppk file. May be create a password and disable SSH login for ubuntu, or create a new user and setup keybased\/password_based login for that user, just to be on the safer side.","Q_Score":0,"Tags":"python,amazon-ec2,sudo,devops,production","A_Id":54398348,"CreationDate":"2019-01-27T20:39:00.000","Title":"python production, recommended to create a new user and grant it sudo priviledges to start with?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"Doing a production on EC2, was wondering if it is advisable to start by creating a new user and granting it sudo privileges, since not many people do but I have seen it done","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":34,"Q_Id":54392650,"Users Score":0,"Answer":"If the alternative would be logging in as root directly, the answer is yes.\nIt's best to work as a non-root user, with occasional use of sudo.  Doing everyday work as the root user is unsafe.","Q_Score":0,"Tags":"python,amazon-ec2,sudo,devops,production","A_Id":54392745,"CreationDate":"2019-01-27T20:39:00.000","Title":"python production, recommended to create a new user and grant it sudo priviledges to start with?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I've added a Databricks Notebook to a Datafactory pipeline. If the Python script inside the notebook throws an exception, this exception will not be mentioned by the pipeline. I know there is a runPageUrl where I can see the results. But I want the pipeline to know if an error occurred in the Python script. Is there a way to pass exception information to the pipeline?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":2147,"Q_Id":54400579,"Users Score":0,"Answer":"Found it. I just had to add assertion to the exceptions. Next step is to find out how to get the error message in the outcome of the activity in the pipeline...","Q_Score":3,"Tags":"python,azure,exception,azure-data-factory-2,azure-databricks","A_Id":54420548,"CreationDate":"2019-01-28T11:04:00.000","Title":"Get exceptions from Databricks Notebook in Azure Datafactory pipeline","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm trying to run a python3 script through terminal on my mac, but every time I execute the file terminal uses Python 2.7 despite 3.7 being installed.\nI have read in other threads that python3 can be run by using the \"python3\" command, but this seems to load me into the python syntax with \">>>\" at the beginning of every line\nIs there a way of running python 3 while using whatever syntax is native to terminal?\nOr as a last resort what is the command to run a .py file from the python syntax?","AnswerCount":2,"Available Count":1,"Score":0.3799489623,"is_accepted":false,"ViewCount":19387,"Q_Id":54447207,"Users Score":4,"Answer":"Install ppa\n\nsudo add-apt-repository ppa:deadsnakes\/ppa\n\nUpdate packages\n\nsudo apt-get update\n\nUpgrade python 2.x to python 3.x\n\nsudo apt-get install python3.6\nChange default python\nsudo rm \/usr\/bin\/python\nsudo ln -s \/usr\/bin\/python3 \/usr\/bin\/python\nCheck default version\npython -V","Q_Score":2,"Tags":"python,python-3.x,python-2.7,terminal","A_Id":62485102,"CreationDate":"2019-01-30T18:28:00.000","Title":"How to update Python 2.7 to 3 in terminal","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I was looking for this information for a while, but as additional packages and python versions can be installed through homebrew and pip I have the feeling that my environment is messed up. Furthermore a long time ago, I had installed some stuff with sudo pip install and as well sudo python ~\/get-pip.py.\nIs there a trivial way of removing all danging dependencies and have python as it was when I first got the machine, or at least with only the packages that are delivered with the Mac distro?","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":3334,"Q_Id":54450504,"Users Score":0,"Answer":"first delete directories where python is installed. you can find these using\n$ which python \n$ which python3\nthen use \n$ brew doctor\nyou will find broken links which can be removed using  --> $ brew prune\nfinally, you should reinstall python using homebrew\nhope this helps.","Q_Score":3,"Tags":"python,macos,pip,homebrew","A_Id":54451615,"CreationDate":"2019-01-30T22:26:00.000","Title":"How to fully revert Python to factory settings on Mac","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Is there a way I get can the following disk statistics in Python without using PSUtil?\n\nTotal disk space\nUsed disk space\nFree disk space\n\nAll the examples I have found seem to use PSUtil which I am unable to use for this application.\nMy device is a Raspberry PI with a single SD card. I would like to get the total size of the storage, how much has been used and how much is remaining.\nPlease note I am using Python 2.7.","AnswerCount":2,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":6715,"Q_Id":54458308,"Users Score":1,"Answer":"You can do this with the os.statvfs function.","Q_Score":0,"Tags":"python,python-2.7,raspberry-pi","A_Id":54458486,"CreationDate":"2019-01-31T10:19:00.000","Title":"How to get disk space total, used and free using Python 2.7 without PSUtil","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to run a python script when Maya(2018) is launched on my Mac. I tried creating a file called 'userSetup.py' and placing it in my '\/Users\/Shared\/Autodesk\/maya\/2018\/scripts' directory. \nright now the 'userSetup.py' script just has one line:\nprint 'its working'\nso far, I am not able to get the print message to show up in the script editor when I launch Maya(2018). \ngoogle, Autodesk website","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":862,"Q_Id":54472691,"Users Score":1,"Answer":"Maya usually searches for userSetup.py in the paths defined in PYTHONPATH environment variable. By default $HOME\/maya\/2018\/prefs\/scripts directory is added to PYTHONPATHwhen Maya starts. Unless until you are not defining your own PYTHONPATH variable, you can put your userSetup.py in this directory to work with Maya.\nAlso most of the time you can find the print or log statements(basically stdout) from the userSetup.py files in the terminal(from where Maya is launched) instead of the Maya Script editor.","Q_Score":0,"Tags":"python,maya","A_Id":54478839,"CreationDate":"2019-02-01T03:59:00.000","Title":"I am having trouble getting a python script to run when Maya launches","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am using latest version macOS and homebrew, brew doctor find nothing wrong. and I just use brew install python,  brew install python@2 to get latest version of python.\nWhen I type python -c \"import sqlite3\", I get following error messages:\n\npython2.7 -c \"import sqlite3\"\n  130 \u21b5 Traceback (most recent call last):   File \"\", line 1, in\n     File\n  \"\/usr\/local\/Cellar\/python@2\/2.7.15_2\/Frameworks\/Python.framework\/Versions\/2.7\/lib\/python2.7\/sqlite3\/init.py\",\n  line 24, in \n      from dbapi2 import *   File \"\/usr\/local\/Cellar\/python@2\/2.7.15_2\/Frameworks\/Python.framework\/Versions\/2.7\/lib\/python2.7\/sqlite3\/dbapi2.py\",\n  line 28, in \n      from _sqlite3 import * ImportError: dlopen(\/usr\/local\/Cellar\/python@2\/2.7.15_2\/Frameworks\/Python.framework\/Versions\/2.7\/lib\/python2.7\/lib-dynload\/_sqlite3.so,\n  2): Symbol not found: _sqlite3_enable_load_extension   Referenced\n  from:\n  \/usr\/local\/Cellar\/python@2\/2.7.15_2\/Frameworks\/Python.framework\/Versions\/2.7\/lib\/python2.7\/lib-dynload\/_sqlite3.so\n  Expected in: \/usr\/lib\/libsqlite3.dylib  in\n  \/usr\/local\/Cellar\/python@2\/2.7.15_2\/Frameworks\/Python.framework\/Versions\/2.7\/lib\/python2.7\/lib-dynload\/_sqlite3.so\npython -c \"import sqlite3\"\n  1 \u21b5 Traceback (most recent call last):   File \"\", line 1, in\n     File\n  \"\/usr\/local\/Cellar\/python\/3.7.2_1\/Frameworks\/Python.framework\/Versions\/3.7\/lib\/python3.7\/sqlite3\/init.py\",\n  line 23, in \n      from sqlite3.dbapi2 import *   File \"\/usr\/local\/Cellar\/python\/3.7.2_1\/Frameworks\/Python.framework\/Versions\/3.7\/lib\/python3.7\/sqlite3\/dbapi2.py\",\n  line 27, in \n      from _sqlite3 import * ImportError: dlopen(\/usr\/local\/Cellar\/python\/3.7.2_1\/Frameworks\/Python.framework\/Versions\/3.7\/lib\/python3.7\/lib-dynload\/_sqlite3.cpython-37m-darwin.so,\n  2): Symbol not found: _sqlite3_enable_load_extension   Referenced\n  from:\n  \/usr\/local\/Cellar\/python\/3.7.2_1\/Frameworks\/Python.framework\/Versions\/3.7\/lib\/python3.7\/lib-dynload\/_sqlite3.cpython-37m-darwin.so\n  Expected in: \/usr\/lib\/libsqlite3.dylib  in\n  \/usr\/local\/Cellar\/python\/3.7.2_1\/Frameworks\/Python.framework\/Versions\/3.7\/lib\/python3.7\/lib-dynload\/_sqlite3.cpython-37m-darwin.so\n\nwhat may cause the problem? I tried to download python source code and compile it, and move the _sqlite3.so or _sqlite3.cpython-37m-darwin.so file into the brew installed folder, and everything works just fine. Could  brew just forget something in the formula? What can I do except for compiling .so file from source and manually solve the problem?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":518,"Q_Id":54476008,"Users Score":0,"Answer":"I finally find out where the bug hides.\nAll my macOS devices(including 2 Pros and 1 Air) are sharing the same .zshrc file, and for some reason, I add a\nexport DYLD_LIBRARY_PATH=\"\/Users\/myname\/Library\/Developer\/Xcode\/iOS DeviceSupport\/10.0.1 (14A403)\/Symbols\/usr\/lib\/:\/usr\/lib\/\"\nwhich ruins the build of python sqlite shared library file, for sqlite recently add a feature called '_sqlite3_enable_load_extension'.\nwhen I removed the DYLD_LIBRARY_PATH to the outdated dir, and brew reinstall python everything is fine.\nBy the way, brew config and brew doctor provides no information about DYLD_LIBRARY_PATH. Next time I'll follow the rules and provide these informations.\nProblem solved!","Q_Score":1,"Tags":"python,homebrew,homebrew-cask","A_Id":54684608,"CreationDate":"2019-02-01T08:56:00.000","Title":"homebrew python@2 and python provides broken sqlite3","Data Science and Machine Learning":0,"Database and SQL":1,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I was using gsutil API to connect to clusterdata-2011-2 (which is a Google cluster-usage traces of 29 days). it was worked perfectly. But after I have installed Anaconda3, it does not work anymore.\nIt says that gsutil requires python 2.6 or 2.7. \nEven after adding an alias in .bashrc \n\nalias python='\/usr\/bin\/python2\/'\n\nIt didn't work\nCan you please help me?","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":591,"Q_Id":54481157,"Users Score":0,"Answer":"I suspect your alias is wrong firstly... \nalias python=\/usr\/bin\/python2.7 \nFeels better.\nCheck your PATH i.e. $PATH \nAnd try and Remove the Anaconda part...","Q_Score":0,"Tags":"python,gsutil","A_Id":54481217,"CreationDate":"2019-02-01T14:07:00.000","Title":"gsutil requires python 2.6 or 2.7. Issue","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I was using gsutil API to connect to clusterdata-2011-2 (which is a Google cluster-usage traces of 29 days). it was worked perfectly. But after I have installed Anaconda3, it does not work anymore.\nIt says that gsutil requires python 2.6 or 2.7. \nEven after adding an alias in .bashrc \n\nalias python='\/usr\/bin\/python2\/'\n\nIt didn't work\nCan you please help me?","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":591,"Q_Id":54481157,"Users Score":0,"Answer":"euh it  didn't work\nbut also i don't want to remove Anaconda cause i am working with it..\ni am thinking about deploying a new VM ware machine without installing neither python3 nor anaconda\nThank u for your suggestion !!","Q_Score":0,"Tags":"python,gsutil","A_Id":54512505,"CreationDate":"2019-02-01T14:07:00.000","Title":"gsutil requires python 2.6 or 2.7. Issue","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Why am I getting error, if my script creates a folder? I am using Python on Windows 7.\nThe error:\n\nFileExistsError: [WinError 183] Cannot create a file when that file already exists: [path to the file or folder in question]\n\nThe problem is that file and folder were not there.","AnswerCount":3,"Available Count":1,"Score":1.0,"is_accepted":false,"ViewCount":30387,"Q_Id":54491021,"Users Score":8,"Answer":"I just encountered this same issue.  This thread helped me solve the problem, but the following clarification might help someone:\nFor me, the misunderstanding came from shutil.copytree(source, destination, symlinks, ignore).  \nI read destination as being the place where my copied tree will go.  In reality, it creates that location and then copies the tree there.  So if your destination directory already exists, like mine did, you'll get the error.\nHope that helps someone.","Q_Score":9,"Tags":"python,windows","A_Id":60623263,"CreationDate":"2019-02-02T07:32:00.000","Title":"Why am I getting the error: \"FileExistsError: [WinError 183] Cannot create a file when that file already exists\"?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have python 2.7 installed on my macbook pro in \/usr\/bin. When I do ls python*  I see these files: python          python-config       python2.7       python2.7-config    pythonw         pythonw2.7.\nI want to delete them but I can't find a way to do it, I've tried sudo rm -rf  and other things but nothing seems to work. \nWhen I do sudo rm -rf I get this: \nrm: python: Operation not permitted, \nand when I do  sudo rm python I get this\noverride rwxr-xr-x  root\/wheel restricted,compressed for python? \nI want to delete python entirely from my system , can someone help me?","AnswerCount":3,"Available Count":2,"Score":-0.1973753202,"is_accepted":false,"ViewCount":9579,"Q_Id":54495353,"Users Score":-3,"Answer":"Lol can't believe no one has said this:\nBoot into recovery, turn off SIP:\ncsrutil disable\nrestart,\nopen terminal\ncd \/usr\/bin\nthen\nsudo chmod -R 777 .\/\ntry it again\n$ python --version\nyou should no longer see it","Q_Score":2,"Tags":"python,macos,terminal,command,uninstallation","A_Id":62700254,"CreationDate":"2019-02-02T17:02:00.000","Title":"Unable to uninstall python 2.7 in mac os","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have python 2.7 installed on my macbook pro in \/usr\/bin. When I do ls python*  I see these files: python          python-config       python2.7       python2.7-config    pythonw         pythonw2.7.\nI want to delete them but I can't find a way to do it, I've tried sudo rm -rf  and other things but nothing seems to work. \nWhen I do sudo rm -rf I get this: \nrm: python: Operation not permitted, \nand when I do  sudo rm python I get this\noverride rwxr-xr-x  root\/wheel restricted,compressed for python? \nI want to delete python entirely from my system , can someone help me?","AnswerCount":3,"Available Count":2,"Score":-0.0665680765,"is_accepted":false,"ViewCount":9579,"Q_Id":54495353,"Users Score":-1,"Answer":"Do not remove python 2.7 from your Mac computer. As you have seen you probably can't anyway. The Mac uses python and the files are protected to be sure they are not removed. \nIf you want to run another version of python install it and set up virtual environments.","Q_Score":2,"Tags":"python,macos,terminal,command,uninstallation","A_Id":54499849,"CreationDate":"2019-02-02T17:02:00.000","Title":"Unable to uninstall python 2.7 in mac os","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am using Mac OS High Sierra and trying to learn Django framework over Pycharm IDE. But my directories are only read only and so I cannot add more files or make changes on the existing files. I tried in Pycharm > File > Make Directory Writeable but it did not help either. This question has been answered for Windows or Ubuntu but those commands do not work at least on my Mac. Anyone knows how to solve this issue?\nThanks in advance!","AnswerCount":2,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":3519,"Q_Id":54502582,"Users Score":1,"Answer":"Open Terminal\n\nGo to you folder\ncd Desktop\/myfolder\n\nRun this command\nsudo chmod 777 -R *","Q_Score":1,"Tags":"python,django,macos,pycharm","A_Id":67901742,"CreationDate":"2019-02-03T11:55:00.000","Title":"Pycharm (JetBrains) cannot modify the read-only directory on my macbook","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":1},{"Question":"I need to develop a bunch of Python scripts pulling data from various sources asynchronously and populating a shared database. Everything will eventually run off AWS, while I do my developing locally on a Win10 machine.\nTo avoid any compatibility issues, I would like to get going with Docker for this project - but I'm not sure how to set up my environment for development. One option I can see might work is using PyCharm and their Docker plugin.\nWhat are the other options? I would like to be able to execute snippets of code directly from the editor in an interactive mode, on the back of a Docker image that I would then be able to deploy on AWS in large numbers.","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":137,"Q_Id":54505658,"Users Score":1,"Answer":"Docker development can be very productive using either of these two options:\n\nYou can map source code volumes into a production image.\nThis works in the same way as a normal VM-based development cycle. Be careful with the number\/size of your mounts if you aren't developing on Linux.\nOptimise your Dockerfile for rebuild efficiency.\nDocker builds can be super fast if you do them carefully. This path is better (or necessary) if you are using swarm because it tends to depend on built images with proper digests.\n\nI have not found the PHPStorm Docker extension very helpful, and I suspect PyCharm would be similar. It is really just a wrapper to basic docker container build|run|ps.\nI'm not sure executing code snippets will be that easy, but there might be a way to pipe it into a running container.","Q_Score":0,"Tags":"python,docker,pycharm","A_Id":54509115,"CreationDate":"2019-02-03T17:41:00.000","Title":"Optimal environment setup for Python development with Docker","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have command.list file with command parameters for my python script my_script.py which have 3 parameters.\nOne line of which look like:\n<path1> <path2> -sc 4\nLooks like it not work like this because parameters should be split?\ncat command.list | xargs -I {} python3 my_script.py {}\nHow to split string to pararmeters and pass it to python script?","AnswerCount":3,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":1874,"Q_Id":54511428,"Users Score":2,"Answer":"What about cat command.list | xargs -L 1 python3 my_script.py? This will pass one line (-L 1) at a time to your script.","Q_Score":0,"Tags":"python,bash,xargs","A_Id":54511656,"CreationDate":"2019-02-04T07:01:00.000","Title":"How to pass parameters from xargs to python script?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm new to coding and just started using Visual Studio to learn Python.  In a tutorial video, the professor said that I can hit Ctrl + Alt + N to automatically run my code.  I get the error \"[Running] python -u \"c:\\Users***\\Desktop\\Test\\app.py\"\n'python' is not recognized as an internal or external command,\noperable program or batch file.\"\nI am able to run it when I go to my terminal and run through CMD but not when I do the shortcut.  I looked through settings and there wasn't anything I saw that stood out.  Any suggestions?\nThanks","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":144,"Q_Id":54522668,"Users Score":0,"Answer":"Open the Start Search, type in \u201cenv\u201d, and choose \u201cEdit the system environment variables\u201d:\nClick the \u201cEnvironment Variables\u2026\u201d button\nClick on Path variable\nClick on edit button\nCreate a new address, where you have installed python. The default address is C:\\Python34\nSave and exit the window\nInstall Python extension on VScode\nRestart VScode\nIf problem continues then, open command pallete( CTRL + Shift + p )\n\n9.1. Type Python\n9.2. Select python interpreter from the drop down menu","Q_Score":0,"Tags":"python,visual-studio","A_Id":70194562,"CreationDate":"2019-02-04T19:01:00.000","Title":"Visual Studio Error Ctrl + Alt + N with Python","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a python environment (it could be conda, virtualenv, venv or global python) - I have a python script - hello.py - that I want to execute within that environment. \nIf I get the path to the python binary within the environment, for example, in windows with a conda environment called myenv, \/path\/to\/myenv\/Scripts\/python.exe,  and if I execute the script using that python, as shown below, am I guaranteed that the script is executed in that environment, independent of the type of virtual environment? If not, what can I do to ensure such a guarantee?\n\/path\/to\/myenv\/Scripts\/python.exe path\/to\/hello.py","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":811,"Q_Id":54525141,"Users Score":0,"Answer":"I suspect not. There are a few environment variables (e.g. PATH) which are changed when you activate a virtualenv. You can open up myenv\/bin\/activate in a text editor to see what it does.\nIs there a particular reason you want to call the executable directly, rather than use the environment as designed? (e.g. . .\/myenv\/bin\/activate; python hello.py)","Q_Score":1,"Tags":"python,virtualenv,conda,python-venv","A_Id":54526278,"CreationDate":"2019-02-04T22:16:00.000","Title":"How to execute a python script within a virtual environment using the python binary path?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a python code which reads data from one cloud system via rest api using the requests module and then writes data back to another cloud system via rest api . This code runs anywhere from 1 to 4 hours every week. Is there a place in Google Cloud Platform , I can execute this code on a periodic basis. Sort of like a scheduled batch job . Is there a serverless option to  do this in App Engine . I know about the App engine cron service but seems like it is only for calling a URL  regularly . Any thoughts ? Appreciate your help.","AnswerCount":3,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":362,"Q_Id":54526638,"Users Score":0,"Answer":"You can use AI Platform Training to run any arbitrary Python package \u2014 it doesn\u2019t have to be a machine learning job.","Q_Score":0,"Tags":"python-3.x,google-cloud-platform","A_Id":58162476,"CreationDate":"2019-02-05T01:23:00.000","Title":"Advise needed - Running Python code on GOOGLE CLOUD PLATFORM serverless","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"Day in and out I often need to create virtual machines in the Azure, I am thinking of using Azure API to automate this task. However, the Azure API requires the client ID and secret for authentication purpose.\nI did search Google on how can I retrieve this info, but everything points me to register a new Application to get a client and secret ID. But in my case, I just want to launch and terminate VMs and do not understand the rationale behind registering an APP for this purpose.\nCan I get the client and sec Id without registering an APP? If yes, can someone point me in the right direction?","AnswerCount":2,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":4266,"Q_Id":54527309,"Users Score":1,"Answer":"You need to register an app, because that is the identity your script will use.\nAny user or app interacting with a subscription needs an identity in the linked AAD + access granted via Azure RBAC.\nRegister a Web App\/API, and then just grab the client id (application id) and create a key (secret). \nThen go to the subscription \/ resource group \/ resource and give the app the necessary access from the Access Control IAM tab.","Q_Score":0,"Tags":"python,azure,azure-devops,azure-active-directory","A_Id":54528425,"CreationDate":"2019-02-05T03:19:00.000","Title":"How do I retrieve client ID and secret in Azure to use creating and destroying Virtual Machines?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a very long running python script, that cannot be parallelized (so it is single threaded = running only with one process).\n\nThis job runs several days on my own computer. \nIt does not benefit from any GPU support. \nFor analysis and parameter optimization, I assume to run this job several times; perhaps 10 - 20 times with each time different parameters.\nAs my own existing computer ressources are limited, I would like to use a powerful cloud CPU for this task.\nIf I realize that the cloud CPUs are really much faster than my own CPU, I probably will migrate the job from e.g. AWS EC2 (Amazon Web Services) to a cheaper flat rate solution like Hetzner.\n\nWith this use case: does it make sense to put my setup in a docker container?\nOr does this task not justify the effort for engineering and taking the learning curve in docker \/ docker compose etc.?","AnswerCount":2,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":47,"Q_Id":54541585,"Users Score":1,"Answer":"Docker will make it much easier for you to run your application in the cloud in the sense that, you will be able to switch machines much easier.  In addition, it will make it easy to run it cheaper, because you won't have to spend alot of time spinning up your VMs, and can cheaply and easily spin VMs down, knowing that only docker run and no specific python or yum install steps have to be done to bootstrap the program.","Q_Score":0,"Tags":"python,docker","A_Id":54561281,"CreationDate":"2019-02-05T19:19:00.000","Title":"Cloud computing: when is the effort for using docker justified?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Apparently pandas.read_sas can only read XPORT or SAS7BDAT format SAS files while Dispatch from wind32com.client can read .jmp format but only on windows. So is there a straightforward way to read in JMP files with Python on a Mac?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":760,"Q_Id":54544028,"Users Score":0,"Answer":"As of Feb 2019 it doesn't seem possible to read in .jmp files using Python on a Mac. The best option is probably to get a 30-day trial of JMP software and convert .jmp files to csv or something from there. You can also read SAS files (not .jmp) in R with haven::read_sas().","Q_Score":1,"Tags":"python,sas-jmp","A_Id":54714237,"CreationDate":"2019-02-05T22:28:00.000","Title":"Reading .jmp files with Python on a Mac","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm running a python script remotely from a task machine and it creates a process that is supposed to be running for 3 hours. However, it seems to be terminating prematurely at exactly 2 hours. I don't believe it is a problem with the code because after the while loop ends, I am logging to a log file. The log file doesn't show that it exits out of that while loop successfully. Is there a specific setting on the machine that I need to look into that's interrupting my python process?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":20,"Q_Id":54566949,"Users Score":0,"Answer":"Is this perhaps a Scheduled Task? If so, have you checked the task's properties? \nOn my Windows 7 machine under the \"Settings\" tab is a checkbox for \"Stop the task if it runs longer than:\" with a box where you can specify the duration.\nOne of the suggested durations on my machine is \"2 hours.\"","Q_Score":0,"Tags":"python,windows,process,task","A_Id":54567372,"CreationDate":"2019-02-07T05:37:00.000","Title":"TaskManager: Process is Terminated At Exactly 2 Hours","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I would like to run multiple python scripts (lets say script1.py to script10.py) in parallel in a bash shell. Can someone advise what is the best way to run all simultaneously using xargs command? or is there any other suggestions? Thanks in advance","AnswerCount":3,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":341,"Q_Id":54568011,"Users Score":0,"Answer":"There are some considerations you need to take into account.  (that other answers haven't taken into account)\n\nAre the scripts developed to run independently?  If that is the case this is easier.  If not then you will need a pipeline of scripts to manage the dependencies like Python's Luigi.\nThe scripts may require different python interpreter versions. (2.7 vs 3.7 etc..)\nIf you do decide to continue in Bash then the usage of nohup would make sure the process doesn't quit when the calling process is ended.\n\nThis isn't as easy of a question as you think it might be.","Q_Score":0,"Tags":"python,bash,parallel-processing,multiprocessing,xargs","A_Id":54568480,"CreationDate":"2019-02-07T07:09:00.000","Title":"Multiprocessing of python scripts","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a server and a front end, I would like to get python code from the user in the front end and execute it securely on the backend. \nI read this article explaining the problematic aspect of each approach - eg pypl sandbox, docker etc. \nI can define the input the code needs, and the output, and can put all of them in a directory, what's important to me is that this code should not be able to hurt my filesystem, and create a disk, memory, cpu overflow (I need to be able to set timeouts, and prevent it from accesing files that are not devoted to it) \nWhat is the best practice here? Docker? Kubernetes? Is there a python module for that? \nThanks.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":182,"Q_Id":54569861,"Users Score":0,"Answer":"You can have a python docker container with the volume mount. Volume mount will be the directory in local system for code which will be available in your docker container also. By doing this you have isolated user supplied code only to the container when it runs. \nScan your python container with CIS benchmark for better security","Q_Score":1,"Tags":"python,security,server,user-input,secure-coding","A_Id":56649312,"CreationDate":"2019-02-07T09:14:00.000","Title":"securely executing untrusted python code on server","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I created a Python script that collects data from a website and generates an Excel file based on a table in that website. I used pyinstaller with -w -F parameters to generate a .exe file.\nI ran this file a few times and it worked perfect so I decided to use Task Scheduler to run it every hour. Two days after the task worked every hour, while I was using the computer the Task Scheduler returned this error when it tried to run the .exe: 0xFFFFFFFF and a pop-up saying: Failed to \"something\"\nGiven the fact that I needed data every hour, I ran the file manually and again... it worked!\nIs there any way I can fix this? How can I make sure that it won't fail again when I leave my computer online for 1 week but I'm not there to manually start it in case it fails...\nHere are the settings for the Task Scheduler:\nActions:\nProgram\/script: C:\\path1\\path2\\path3\\Script_G1.exe\n \/ Start in (optional): C:\\path1\\path2\\path3\\\nSettings:\nAllow task to be run on demand","AnswerCount":3,"Available Count":2,"Score":0.0665680765,"is_accepted":false,"ViewCount":6995,"Q_Id":54572131,"Users Score":1,"Answer":"In the \"Action\" check the \"Start in (optional)\" field. It makes a difference in these situations.","Q_Score":5,"Tags":"python,windows,task,pyinstaller,scheduler","A_Id":64934917,"CreationDate":"2019-02-07T11:18:00.000","Title":"Task Scheduler returns 0xFFFFFFFF in Windows 7","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I created a Python script that collects data from a website and generates an Excel file based on a table in that website. I used pyinstaller with -w -F parameters to generate a .exe file.\nI ran this file a few times and it worked perfect so I decided to use Task Scheduler to run it every hour. Two days after the task worked every hour, while I was using the computer the Task Scheduler returned this error when it tried to run the .exe: 0xFFFFFFFF and a pop-up saying: Failed to \"something\"\nGiven the fact that I needed data every hour, I ran the file manually and again... it worked!\nIs there any way I can fix this? How can I make sure that it won't fail again when I leave my computer online for 1 week but I'm not there to manually start it in case it fails...\nHere are the settings for the Task Scheduler:\nActions:\nProgram\/script: C:\\path1\\path2\\path3\\Script_G1.exe\n \/ Start in (optional): C:\\path1\\path2\\path3\\\nSettings:\nAllow task to be run on demand","AnswerCount":3,"Available Count":2,"Score":0.0665680765,"is_accepted":false,"ViewCount":6995,"Q_Id":54572131,"Users Score":1,"Answer":"We had a similar problem where we'd get a 0xFFFFFFFF error when running our custom .exe from Task Scheduler, but it would work fine outside of Task Scheduler.\nThe workaround was to create a .bat file to run the .exe and make the scheduled task call the .bat file.  Not a solution, obviously, but works in a pinch.","Q_Score":5,"Tags":"python,windows,task,pyinstaller,scheduler","A_Id":58455607,"CreationDate":"2019-02-07T11:18:00.000","Title":"Task Scheduler returns 0xFFFFFFFF in Windows 7","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm making a script that opens Visual Studio through a command prompt. The Visual Studio is opened successfully but if I close the command prompt that the script was run from, the application Visual Studio is closed as well. How can I have it so where after the Vis Studio is opened, I can close the cmd prompt and have Vis Studio still be open?\nHere's the cmd I'm using to open Vis Stud\nsubprocess.call([address + \"\\Code.exe\"])\nOpen up Command Prompt -> Enter Script.py -> *VS Opens -> Close Command Prompt -> *VS Closes","AnswerCount":2,"Available Count":2,"Score":-0.0996679946,"is_accepted":false,"ViewCount":183,"Q_Id":54576241,"Users Score":-1,"Answer":"You can use an ampersand (&) to end your command. This will perform the action but return the terminal to you allowing you to execute other commands (including closing the terminal again).","Q_Score":0,"Tags":"python,cmd,subprocess","A_Id":54577107,"CreationDate":"2019-02-07T15:01:00.000","Title":"How to make an opened application stay open after Python command prompt is closed?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm making a script that opens Visual Studio through a command prompt. The Visual Studio is opened successfully but if I close the command prompt that the script was run from, the application Visual Studio is closed as well. How can I have it so where after the Vis Studio is opened, I can close the cmd prompt and have Vis Studio still be open?\nHere's the cmd I'm using to open Vis Stud\nsubprocess.call([address + \"\\Code.exe\"])\nOpen up Command Prompt -> Enter Script.py -> *VS Opens -> Close Command Prompt -> *VS Closes","AnswerCount":2,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":183,"Q_Id":54576241,"Users Score":0,"Answer":"subprocess.call() will remain running for as long as Visual Studio runs, and killing it will apparently kill VS too.\nYou can detach the two by running subprocess.Popen([address + r'\\code.exe'])\ninstead.","Q_Score":0,"Tags":"python,cmd,subprocess","A_Id":54580324,"CreationDate":"2019-02-07T15:01:00.000","Title":"How to make an opened application stay open after Python command prompt is closed?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I use toolchain from Kivy for compile Python + Kivy project on MacOS, but by default, toolchain use python2 recipes but I need change to python3.\nI\u00b4m googling but I don't find how I can do this.\nAny idea?\nThanks","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":593,"Q_Id":54587891,"Users Score":0,"Answer":"For example, recipe \"ios\" and \"pyobjc\" dependency is changed from depends = [\"python\"] to depends = [\"python3\"]. (__init__.py in each packages in receipe folder in kivy-ios package)\nThese recipes are loaded from your request implicitly or explicitly\nThis description of the problem recipes is equal to require hostpython2\/python2. then conflict with python3.\nThe dependency of each recipe can be traced from output of kivy-ios. \"hostpython\" or \"python\" in output(console) were equaled to hostpython2 or python2.(now ver.)","Q_Score":0,"Tags":"python,xcode,macos,kivy","A_Id":60445492,"CreationDate":"2019-02-08T07:38:00.000","Title":"How change hostpython for use python3 on MacOS for compile Python+Kivy project for Xcode","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I use toolchain from Kivy for compile Python + Kivy project on MacOS, but by default, toolchain use python2 recipes but I need change to python3.\nI\u00b4m googling but I don't find how I can do this.\nAny idea?\nThanks","AnswerCount":2,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":593,"Q_Id":54587891,"Users Score":0,"Answer":"your kivy installation is likely fine already. Your kivy-ios installation is not. Completely remove your kivy-ios folder on your computer, then do git clone git:\/\/github.com\/kivy\/kivy-ios to reinstall kivy-ios. Then try using toolchain.py to build python3 instead of python 2\nThis solution work for me. Thanks very much Erik.","Q_Score":0,"Tags":"python,xcode,macos,kivy","A_Id":54769487,"CreationDate":"2019-02-08T07:38:00.000","Title":"How change hostpython for use python3 on MacOS for compile Python+Kivy project for Xcode","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I need to uninstall Python 2.7.10 completely off my system so that I can install and work with virtualenv and Flask. I also have Python 3.7 installed and want to keep working with that. I'm working with Mac 10.14.2.\nUsing the terminal. Command [python --version] shows 2.7.10. However, when I did [brew install Python3], it shows me that it is already installed and up-to-date. If possible, I'd like to reset even (uninstalling all Python on my computer) and reinstalling python 3.7. (the version is 3.7.2_1)","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":2001,"Q_Id":54602494,"Users Score":0,"Answer":"Python 2.7 comes preinstalled with macOS, so I'm not sure if it is a good idea to uninstall it. You can use the command python3 to use the version 3.7 you installed with homebrew.","Q_Score":0,"Tags":"python-2.7,homebrew,python-3.7","A_Id":54602517,"CreationDate":"2019-02-09T02:07:00.000","Title":"How do I use homebrew to uninstall Python 2.7.10? Python 3.7 also installed. Cannot install\/work with virtualenv or Flask","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"While trying to perform a tcp TWH in scapy I encountered a problem.\nWhen my host receives the syn\/ack, the kernel ip\/tcp stack aborts the handshake by sending rst.\nIt happens because the first packet sent (the syn) is transparent to the os due to the raw socket that scapy is using.\nIn some other questions regarding the same issue the solution was to set up iptables to drop packets with the rst flag.\nDoes anyone have a solution for windows?\n(I prefer not to use the FW unless there is no choice)\nThanks!","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":649,"Q_Id":54655649,"Users Score":1,"Answer":"That's a common problem, and it is not specific to Windows (or Scapy, for that matters - you can face similar issues with Masscan, for example).\nYou have totally understood and describe it: the problem lies in the IP address being \"shared\" between Scapy and your host's IP stack.\nYou have two options:\n\nUse a firewall to prevent your host from getting the SYN\/ACK packet (Scapy will get it anyway) or to prevent your host from sending a RST packet.\nUse a different IP address with Scapy. This is a bit more difficult because it requires some kind of ARP proxy (or a Scapy script) to answer ARP request for the IP address you will use with Scapy.\n\nHope this helps, happy hacking!","Q_Score":1,"Tags":"python,sockets,winsock,scapy,raw-sockets","A_Id":54670769,"CreationDate":"2019-02-12T17:31:00.000","Title":"Scapy TCP Handshake - Windows","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"How to associate .py files to open CMD with py then the filename? Maybe in a .bat file?","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":2905,"Q_Id":54661730,"Users Score":0,"Answer":"You can do it in two separate ways:\nFirst, you can rename your .py file to .pyw and just open it and the script would be executed immediately (with pythonw.exe) but this is not showing you a console output.\nOr you can simple associate your .py files with standard python.exe which will show the console output.","Q_Score":0,"Tags":"python,python-3.x,windows,python-winshell","A_Id":54667729,"CreationDate":"2019-02-13T02:48:00.000","Title":"How to associate .py files to open CMD with `py` then the filename?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"very simple task:\nsrcdir=\"Q:\/\/Waveforms\/\/Cispr16-1-2\/\/Pk\"\nos.chdir(srcdir)\nthe interpreter says:\nWindowsError: [Error 3] The system cannot find the path specified: 'Q:\/\/Waveforms\/\/Cispr16-1-2\/\/Pk'\nfrom cmd prompt the remote driver is visible:\nVolume in drive Q is USERDATA\nVolume Serial Number is CB9A-E149\nDirectory of Q:\\Waveforms\\Cispr16-1-2\\Pk\n13\/02\/2019  12:21              .\n13\/02\/2019  12:21              ..\n13\/02\/2019  12:21             8.225 F1--Pk--00000.trc\n               1 File(s)          8.225 bytes\n               2 Dir(s)  84.622.512.128 bytes free\nMost likely this is a windows10 security issue, not letting Python access the sahred folder. Has anyone experienced the same issue and has found a solution?\nthanks\nMastro59","AnswerCount":2,"Available Count":2,"Score":0.0996679946,"is_accepted":false,"ViewCount":189,"Q_Id":54671193,"Users Score":1,"Answer":"The double \/\/ should be a single \/. Or \\\\.","Q_Score":0,"Tags":"python-2.7,remote-access","A_Id":54689609,"CreationDate":"2019-02-13T13:19:00.000","Title":"os.chdir can't find remote shared driver","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"very simple task:\nsrcdir=\"Q:\/\/Waveforms\/\/Cispr16-1-2\/\/Pk\"\nos.chdir(srcdir)\nthe interpreter says:\nWindowsError: [Error 3] The system cannot find the path specified: 'Q:\/\/Waveforms\/\/Cispr16-1-2\/\/Pk'\nfrom cmd prompt the remote driver is visible:\nVolume in drive Q is USERDATA\nVolume Serial Number is CB9A-E149\nDirectory of Q:\\Waveforms\\Cispr16-1-2\\Pk\n13\/02\/2019  12:21              .\n13\/02\/2019  12:21              ..\n13\/02\/2019  12:21             8.225 F1--Pk--00000.trc\n               1 File(s)          8.225 bytes\n               2 Dir(s)  84.622.512.128 bytes free\nMost likely this is a windows10 security issue, not letting Python access the sahred folder. Has anyone experienced the same issue and has found a solution?\nthanks\nMastro59","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":189,"Q_Id":54671193,"Users Score":0,"Answer":"I tried with \/ and \/\/ and \\ and \\ none of these worked with windows10, but\nin windows7 this command works:\nos.chdir(\"Q:\/\/Waveforms\")\nfor others having the same problem here is the solution for Windows10.\nit is required to access the share using the ip address and share name.\nthe shared drive was named \"d\"\nin python this syntax works:\nos.chdir(\"\\\\ipaddress\\sharename\\folder\") [ 4 \\ AND 2 \\]\nOR \nos.chdir(\"\/\/ipaddress\/sharename\/folder\")\nthis worked well:\nos.chdir(\"\\\\192.168.147.143\\d\\Waveforms\")  [note:IN TEXT MESSAGE I AM TYPING 4\\  AND 2\\ BUT THE POST ONLY SHOWS 2\\ AND 1]\nOR\nos.chdir(\"\/\/192.168.147.143\/d\/Waveforms\") \nresult:\nCurrent Working Directory  D:\\products\\MyscopeControl\\src\nDirectory changed to: \\192.168.147.143\\d\\Waveforms","Q_Score":0,"Tags":"python-2.7,remote-access","A_Id":54707237,"CreationDate":"2019-02-13T13:19:00.000","Title":"os.chdir can't find remote shared driver","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a python project with multiple files and a cmd.py which uses argparse to parse the arguments, in the other files there are critical functions. What I want to do is: I want to make it so that if in the command line I were to put cmd -p hello.txt it runs that python file. \nI was thinking that I could just simply move the cmd.py file to somewhere like \/usr\/bin\/ or some other directory included in the $PATH, however since I have other files which work with my cmd.py, there will be multiple files in my \/usr\/bin.\nAnother thing that I could do is to make a symbolic link between the cmd.py and \/usr\/bin\/cmd like this: ln -s \/path\/to\/cmd.py \/usr\/bin\/cmd, but then where do i put the cmd.py? and is this best practice?\nNote: I intend for this to work on Linux and MacOS X, not windows","AnswerCount":3,"Available Count":1,"Score":0.0665680765,"is_accepted":false,"ViewCount":2883,"Q_Id":54683892,"Users Score":1,"Answer":"You can add a folder to your path.\n\n\nin .bashrc add following\nexport PATH=[New_Folder_Path]:$PATH\n\nput the python program in your path_folder created at step 1.\nmake it executable : chmod u+x [filename]\nopen a new terminal, and you should be able to call the python program\nNOTE: make sure to put the shebang in your python-file : #!\/usr\/bin\/env python3","Q_Score":0,"Tags":"python,linux,command-line,command-line-arguments,argparse","A_Id":54685103,"CreationDate":"2019-02-14T05:42:00.000","Title":"Make Python Project Into Command Line Tool","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Hello stackoverflow people!\nI would like to discuss and see what's the better approach to my problem.\nI have an application that send files to clients using multiple protocols (FTP(S), SFTP, S3, EMail).\nThere's a celery task per directory. A directory can be send to multiple clients and can be send to multiple destinations. e.g. dir1 -> client1 -> FTP and EMail (2 tasks, fine to run in parallel), dir2 -> client1 AND client2 -> same FTP hostname, different remote directories (2 tasks, not fine to run in parallel).\nThis is working fine, however I'm causing client network congestion sometimes, due to multiple connections from multiple workers to the same destination, some clients don't know (or want to implement) QOS.\nI would like to have a logic that don't allow tasks connecting to the same protocol or hostname running at the same time. Per example, a directory that is being send to 2 x S3 buckets, should run once, after it finished the second will start. Or two different directories that is being send to the same FTP server.\nMy initial idea is to implement a celery_worker queue remote control. One queue for each account, protocol. And setup workers with concurrency 1 listening on the queues.\nWondering if any of you had a similar challenge and how did you workaround it.","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":201,"Q_Id":54688207,"Users Score":1,"Answer":"Your proposed solution is rather brittle (you really shouldn't rely on celery concurrency settings to control\/prevent concurrent execution) and will probably not solve all the potential race conditions (for example if taskA and taskB are on different queues but need to access a resource that doesn't support concurrent access).\nThere are quite a couple recipes (from rather informal advises to full-blown libs like celery-once) to prevent concurrent execution of one given task. They don't directly solve your own problem but basically the principle is the same: have some shared lock mechanism that the tasks communicate with - try to acquire the lock, only run once they get it, and of course release it. If you're using Redis as result backend, it's rather low read\/write cost and it's 'expire' feature can be really helpful, but you can also just use your SQL database.","Q_Score":1,"Tags":"python,python-3.x,celery,celery-task","A_Id":54690143,"CreationDate":"2019-02-14T10:28:00.000","Title":"Celery task \/ worker assignment logic","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to get data from an a endoscope into my opencv code in python. The endoscope machine has a dvi output and I have a Datapath vision capture card which helps read it into my system. I understand that opencv can only read from usb cameras or ip webcams. I was wondering if anyone has done this kind of a read into opencv?\nPointers greatly appreciated.","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":838,"Q_Id":54709269,"Users Score":0,"Answer":"It might be possible to have the DVI stream written to a file, FFMPEG\/gstreamer read the file stream, and then pipe the input into OpenCV.","Q_Score":0,"Tags":"python,c++,opencv","A_Id":54800843,"CreationDate":"2019-02-15T12:19:00.000","Title":"How to access data from the vision capture cards to opencv?","Data Science and Machine Learning":1,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"We have purchased Sage 100 partner account. I have also set up Sage ERP 100 on windows server 2016. But, I am stuck at the following points.\n\nWhere to add business\nHow to set up web services and access REST APIs\nHow I will make server configuration\n\nAny help in Sage 100 setup will be appreciated.","AnswerCount":1,"Available Count":1,"Score":0.537049567,"is_accepted":false,"ViewCount":445,"Q_Id":54764065,"Users Score":3,"Answer":"Typically you would work with a Sage partner or reseller to set up your Sage 100 environment.  Depending on your location, there should be several available.  You would typically check the Sage website to see the Sage partners in your area.\nWith that said, I used to do a lot of programming against Sage 100 and I can tell you that there is no REST or web services API.  What you would typically do is deploy your own API that reads from Sage 100 as a database.  There is an ODBC connection that is included by default with the product, called SOTAMAS90, that will allow you read-only access to all the Sage 100 tables.  The 32-bit connector is installed automatically when you install the program.  There is a 64 bit version as well, but that takes more work to set up.  The 32 bit version is easiest, but it does require that your API code be running as a 32 bit service or program.\nI would typically write C# programs that consume the SOTAMAS90 data and serve it via REST.  ASP.NET Web API or Core are both good choices for doing this.\nSince the SOTAMAS90 ODBC client is read-only, you will have to do something else if you need to write data back to Sage 100.  The two interfaces that I'm familiar with are VI and BOI.\nVI, or Visual Integrator is basically a utility for importing data from a source file (typically a CSV).  It has some limitations, but it does work.  You can launch it programmatically, which makes it usable on-demand.  If doesn't throw error messages, however.  If a row can't be written, it just skips it.  You can view a report after the fact to see what wrote and what didn't.  \nBOI, or the Business Object Interface, is a COM component that you can code against.  It provides more robust data validation, and does throw errors on a per-record (and sometimes a per-field) basis so you can respond to those in your code accordingly.  Unfortunately, while most of the modules are exposed the BOI, not all of them are.  Every year, Sage is porting more and more functionality to \"the new framework\" which also means it is available via BOI.  \nFinally, you can also set up a linked server in SQL Server to serve the ODBC data that way.  Any way you hit that SOTAMAS90 DSN though, it's slow.  Some developers like to copy all of the data to SQL Server and serve it from there.  If you do that, be sure to add foreign keys and indexes.  And run a nightly ETL to keep the data fresh.  There are also solutions via User Defined Scripts that will allow you to respond to individual row CRUD events.\nHope that helps.\nAaron","Q_Score":0,"Tags":"python,ruby,cloud,erp,sage-one","A_Id":54817105,"CreationDate":"2019-02-19T10:30:00.000","Title":"Sage 100 ERP setup on windows server machine","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm using cassandra_driver-3.16.0.dist.\nCassandra spits out a ton of non-essential WARNING logs that clog up my terminal.  How can I disable them in my python project?","AnswerCount":3,"Available Count":1,"Score":0.0665680765,"is_accepted":false,"ViewCount":511,"Q_Id":54777594,"Users Score":1,"Answer":"Python logging is by modules or classes as we call it outside python.\nYou can disable logging in module level using command:\nlogging.getLogger('cassandra').setLevel(logging.ERROR).\nThis will set the logging level to ERROR and will not print levels below ERROR.","Q_Score":2,"Tags":"python,cassandra","A_Id":60364833,"CreationDate":"2019-02-20T01:45:00.000","Title":"How do you disable console logging in your Python Cassandra Driver client?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have python2.7, python3.7, python3.6 on my machine. I am still not sure how manage and see location of all three python version. \nCurrently I just type python with version name to open that terminal or run script. \nI did python3.6 default by aliasing in ~\/.bashrc.\nI have installed virtualenv using python3.6 so whenever I create venc by default it takes python3.6 in it.\nTo create venv with python2.7 I tried -\nvirtualenv -p \/usr\/bin\/python2.7 \/Users\/karim\/Documents\/venv2.7\nBut here also in this venv2.7 when I see python version it give 3.6. When I type python2.7 in terminal it opens python2.7.\nI can do aliasing for python2.7 being in virtual environment but I doubt that may create python2.7 default outside venv as well. \n\nHow can I create virtual environment with python2.7 default?\nCan you refer me any article which explain how to manage multiple python version, switch from one to another, see there locations\n\nI really checked all SO threads but no articles helped me to create venv with python2.7 in system having python3.6 default.","AnswerCount":5,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":10150,"Q_Id":54782163,"Users Score":0,"Answer":"If you use pycharm, you can create a new virtual environment under settings > project > cog symbol, drodown menu: add.\nHere you can specify which is your base python interpreter, point this to where python3 or python2 are installed and pycharm will do the hardwork for you.","Q_Score":4,"Tags":"python,python-3.x,python-2.7,ubuntu,virtualenv","A_Id":60828867,"CreationDate":"2019-02-20T08:47:00.000","Title":"Use python2.7 in venv where python3 is default python","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm wondering what would be the best practice to update the source code in a docker container that is run within( in JAVA and python). I could either modify my code, create a new image and run a container. In Java,  I would also need to compile the code. \nAnother solution would be to just use a volume to share the code between my machine and the container so that each time I modify the behavior of my code I won't need to create a new docker image.\nI'm asking all of this for development purposes, not deploying\nIs there a best practice between these two solutions? What are the pros and cons? Is there a difference for a compiled language like a java compared to python?","AnswerCount":4,"Available Count":3,"Score":0.0,"is_accepted":false,"ViewCount":1084,"Q_Id":54788991,"Users Score":0,"Answer":"You should make a new image, and if you think creating a new image and deploying is a task for you, than you can setup a CI\/CD pipeline which will automatically compile java code, create a image and will deploy it for you whenever you push a code to GIT.","Q_Score":2,"Tags":"java,python,docker,docker-image","A_Id":54789337,"CreationDate":"2019-02-20T14:46:00.000","Title":"Create a new image or share source code in a volume in a docker container in development?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I'm wondering what would be the best practice to update the source code in a docker container that is run within( in JAVA and python). I could either modify my code, create a new image and run a container. In Java,  I would also need to compile the code. \nAnother solution would be to just use a volume to share the code between my machine and the container so that each time I modify the behavior of my code I won't need to create a new docker image.\nI'm asking all of this for development purposes, not deploying\nIs there a best practice between these two solutions? What are the pros and cons? Is there a difference for a compiled language like a java compared to python?","AnswerCount":4,"Available Count":3,"Score":0.049958375,"is_accepted":false,"ViewCount":1084,"Q_Id":54788991,"Users Score":1,"Answer":"In general the best practice would be to create a new image when you have new source code and run a new container from that image. Docker can quickly create and run new images, so you should take advantage of that. In addition you can know what version of your code you're running by tagging your images. \nYou mention that you would need to compile the Java code in the Docker case, but you would need to in either case. You could just compile your code into a Jar and then ADD (or COPY) the Jar into your container and run it there.\nA couple of quick downsides that come to mind with the external code approach: you would need some external way to manage what version of code is running, docker tags take care of that for you. You would also need some way to alert the Docker container that a new executable file is ready and then have Docker run that. In addition you would need to make sure that your Docker container is running the same version of Java (or Python) that your system is running, this too is taken care of in Docker since you can build from a Java base image.","Q_Score":2,"Tags":"java,python,docker,docker-image","A_Id":54789428,"CreationDate":"2019-02-20T14:46:00.000","Title":"Create a new image or share source code in a volume in a docker container in development?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I'm wondering what would be the best practice to update the source code in a docker container that is run within( in JAVA and python). I could either modify my code, create a new image and run a container. In Java,  I would also need to compile the code. \nAnother solution would be to just use a volume to share the code between my machine and the container so that each time I modify the behavior of my code I won't need to create a new docker image.\nI'm asking all of this for development purposes, not deploying\nIs there a best practice between these two solutions? What are the pros and cons? Is there a difference for a compiled language like a java compared to python?","AnswerCount":4,"Available Count":3,"Score":0.0996679946,"is_accepted":false,"ViewCount":1084,"Q_Id":54788991,"Users Score":2,"Answer":"You should definitely make a new image instead of sharing the code via a mounted volume. Then whole docker ideology is to produce a self-contained \"service\", which can be portable across server (i.e. copy the image). Yuo docker file and image build process will track versions of your code, i.e. in your docker file you can pull a specific branch, or you can tag the image with a specific tag.\nIn case of a mounted volume, you never sure what version of your code is actually. run.\nHope this reason alone will help you to decide.","Q_Score":2,"Tags":"java,python,docker,docker-image","A_Id":54789199,"CreationDate":"2019-02-20T14:46:00.000","Title":"Create a new image or share source code in a volume in a docker container in development?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I recently started using VS Code for Python. \nI realized that when I hit debug\/F5, VS Code prints several folder paths (locations of workspace, Python.exe, host, Port, etc.) in Terminal window before debugging the code. \nI am using Windows 7 machine.\nWhy is that and how can I avoid it?\nThanks for your advise.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":26,"Q_Id":54791468,"Users Score":0,"Answer":"It's by design and required in order to run the debugger, so there's no way to avoid it.","Q_Score":2,"Tags":"python,visual-studio-code","A_Id":54794774,"CreationDate":"2019-02-20T16:48:00.000","Title":"VS Code Terminal Printing Several Folder Paths before rnning Python script","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I installed python package python2-rpdb.noarch on centos using\nsudo yum install python2-rpdb.noarch --installroot='\/some\/local\/path' -v -y it gets installed by I cannot find anything on the path \/some\/local\/path\/ \nI cannot use pip as I do not have permission to use pip or otherwise pip is the way to go","AnswerCount":3,"Available Count":3,"Score":0.0,"is_accepted":false,"ViewCount":520,"Q_Id":54825109,"Users Score":0,"Answer":"Try which python and will list the current location from where is is used and then a softlink can be created to the location where you want to use","Q_Score":1,"Tags":"python,centos,yum","A_Id":55016832,"CreationDate":"2019-02-22T10:32:00.000","Title":"to what location on disk does yum installs python packages by default?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I installed python package python2-rpdb.noarch on centos using\nsudo yum install python2-rpdb.noarch --installroot='\/some\/local\/path' -v -y it gets installed by I cannot find anything on the path \/some\/local\/path\/ \nI cannot use pip as I do not have permission to use pip or otherwise pip is the way to go","AnswerCount":3,"Available Count":3,"Score":0.0,"is_accepted":false,"ViewCount":520,"Q_Id":54825109,"Users Score":0,"Answer":"If you want to find something in centos , go with locate command.\n\"\/usr\/lib\/python2.7\"  -  In my vm Python is here by deafault. I found this from locate command o\/p\ncommand used :  \"locate python\"","Q_Score":1,"Tags":"python,centos,yum","A_Id":54826914,"CreationDate":"2019-02-22T10:32:00.000","Title":"to what location on disk does yum installs python packages by default?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I installed python package python2-rpdb.noarch on centos using\nsudo yum install python2-rpdb.noarch --installroot='\/some\/local\/path' -v -y it gets installed by I cannot find anything on the path \/some\/local\/path\/ \nI cannot use pip as I do not have permission to use pip or otherwise pip is the way to go","AnswerCount":3,"Available Count":3,"Score":1.2,"is_accepted":true,"ViewCount":520,"Q_Id":54825109,"Users Score":0,"Answer":"I got it by little bit of digging , \nI searched like this : \nrpm -ql python2-rpdb-0.1.5-2el7.1.noarch\nits installed in the \/usr\/lib\/python2.7\/site-packages folder\nor in \/usr\/lib64\/python2.7\/","Q_Score":1,"Tags":"python,centos,yum","A_Id":54826224,"CreationDate":"2019-02-22T10:32:00.000","Title":"to what location on disk does yum installs python packages by default?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"How to install libraries like cairomm-devel,pangomm-devel those packages are not in Amazon Linux AMI.\nBut i need those libraries.\nHow do i install those libraries?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":29,"Q_Id":54825688,"Users Score":0,"Answer":"There is no solution Amazon Linux does not have those libraries required.\nI fixed by migrating my server to Docker Instance using AWS Fargate (Serverless Approach).","Q_Score":0,"Tags":"python,amazon-web-services,amazon-ec2,yum","A_Id":58638495,"CreationDate":"2019-02-22T11:03:00.000","Title":"How to install libraries like cairomm-devel, pandomm-devel on Aws Linux AMI","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Is there any way to prevent Windows from shutting down my system with Python. So I can't shutdown my system while my Python script is running?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":964,"Q_Id":54830926,"Users Score":2,"Answer":"yes there is.\nfrom windows docs\n\nShutdown Notifications\nApplications with a window and message queue\nreceive shutdown notifications through the WM_QUERYENDSESSION and\nWM_ENDSESSION messages. These applications should return TRUE to\nindicate that they can be terminated. Applications should not block\nsystem shutdown unless it is absolutely necessary. Applications should\nperform any required cleanup while processing WM_ENDSESSION.\nApplications that have unsaved data could save the data to a temporary\nlocation and restore it the next time the application starts. It is\nrecommended that applications save their data and state frequently;\nfor example, automatically save data between save operations initiated\nby the user to reduce the amount of data to be saved at shutdown.\nConsole applications receive shutdown notifications in their handler\nroutines. To register a console handler, use the SetConsoleCtrlHandler\nfunction. Service applications receive shutdown notifications in their\nhandler routines. To register a service control handler, use the\nRegisterServiceCtrlHandlerEx function.\nBlocking Shutdown\nIf an application must block a potential system shutdown, it can call the\nShutdownBlockReasonCreate function. The caller provides a reason\nstring that will be displayed to the user. The reason string should be\nshort and clear, providing the user with the information necessary to\ndecide whether to continue shutting down the system.\n\nso you have to intercept the WM_QUERYENDSESSION message and return False .\nand doing some web search i found a discussion about that how to intercept the WM_QUERYENDSESSION in python :\n\nif you've built an app with a message loop, you can receive the\nWM_QUERYENDSESSION message. If you want to have a GUI, most GUI\nlibraries will probably wrap this up in their own way. If you don't\nneed a GUI, your simplest solution is probably to use PyWin32.\nSomewhere in the docs there's a tutorial on creating a hidden window\nand writing a simple message loop. Just do that on the main thread,\nand do your real work on a background thread, and signal your\nbackground thread when a WM_QUERYENDSESSION message comes in.\nOr, much more simply, just use SetConsoleCtrlHandler (again through\nPyWin32). This can also catch ^C, ^BREAK, and the user closing your\nconsole, as well as the logoff and shutdown messages that\nWM_QUERYENDSESSION catches. More importantly, it doesn't require a\nmessage loop, so if you don't have any other need for one, it's a lot\nsimpler.\n\ni can't help with code snippet as i don't have access to windows pc and i don't want to share code without testing, but i hope i pointed you to what you should look for.","Q_Score":2,"Tags":"python,windows","A_Id":54832170,"CreationDate":"2019-02-22T16:04:00.000","Title":"Block Windows 10 Shutdown with Python 3","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"i developed a small web APP with CherryPy for Python. I want to run this on a production Server with ubuntu 16.04. My Sysadmin tells me that I shall not use pip or github repository, because of ... something wrong with using anything but apt ... he says. \nIs there a way of getting a recent cherrypy for python3 with apt ?","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":2257,"Q_Id":54831915,"Users Score":0,"Answer":"The solution on Ubuntu 16.04 with python3 (Python 3.5.2):\nInstall virtualenvironment for python3\nsudo apt-get install python3-venv\nCreate a folder for your environment\nmkdir environment\nCreate the environment\npython3 -m venv environment\nChange into folder\ncd environment\/bin\nActivate environment\nsource activate\nInstall pip within the env\napt install python3-pip\nInstall cherrypy >= 18.1.0\npip3 install cherrypy\nRun program\npython3 .\/my_python_script.py","Q_Score":0,"Tags":"python,ubuntu,cherrypy","A_Id":54922769,"CreationDate":"2019-02-22T17:02:00.000","Title":"Python 3.5.2 Installation of Cherrypy with apt","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I want to use Xcode to create python applications and I am testing it and every time I want to run the project I get the following error:\n\nThere is a problem launching using posix_spawn (error code: 8).\n\nAnd Xcode also said build succeeded.\nwhat can I do to resolve this problem?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":2550,"Q_Id":54856231,"Users Score":0,"Answer":"try change executable interpreter to \/usr\/bin\/pythonw","Q_Score":0,"Tags":"python-3.x,xcode10,macos-mojave","A_Id":57628096,"CreationDate":"2019-02-24T20:29:00.000","Title":"using Xcode 10 for python, gets a launch error","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a folder containing multiple images, i want to write these images as a video file on Google drive. Is there any way to achieve this?\nI cannot write the images to video file in local system and then upload to Google Drive, because of space constraint.","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":39,"Q_Id":54863190,"Users Score":1,"Answer":"The google drive api is a file store api.  It contains information about the files it contains and it will allow you to upload new files.  To some extent it can covert one file type to another.   For example it can covert an excel file to a google sheets file and back and forth.\nThe google drive api does not have the ablity to allow you to upload two images and have them coverted into a video.\nYou will need to encode the video locally on your machine and then upload the video after.","Q_Score":1,"Tags":"python-3.x,google-drive-api","A_Id":54864817,"CreationDate":"2019-02-25T09:36:00.000","Title":"Write a set of images to a Video file on Google Drive","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Is it possible to activate a python virtual environment for everything a user do ? I have a webapp executing python code, and I would want the www-data user used by the apache host to use a specific python venv (It would solve a struggle for libraries).","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":200,"Q_Id":54869094,"Users Score":0,"Answer":"source the virtual environment in ~\/.bashrc","Q_Score":0,"Tags":"python,bash,apache,web,virtualenv","A_Id":54869163,"CreationDate":"2019-02-25T15:05:00.000","Title":"Set a python virtual environment to a ubuntu user?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I recently switched over from using a PC to a Mac and now for whatever reason one of my Impala drivers that worked fine is no longer found when run in Python. I keep receiving this error every time I run the script : \"java.lang.RuntimeException: Class com.cloudera.impala.jdbc41.Driver not found\". Please see code snippet for my connection below.\nc = jaydebeapi.connect\n(jclassname='com.cloudera.impala.jdbc41.Driver',\nurl='jdbc:impala:\/\/cloudera-impala-proxy.live.bi.xxx\/;AuthMech=3;ssl=1;',\ndriver_args=['xxx', self.dwh_password],                               jars='\/Users\/xxx\/Desktop\/ImpalaJDBC41 2.jar')\nAny help or suggestions are appreciated, I feel like I'm going crazy trying to get this to work.","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":1177,"Q_Id":54870285,"Users Score":0,"Answer":"Did you check do you have the ImpalaJDBC***.jar in your new machine.\nPlease check properly weather it's available at classpath\/build path or not.\nEdit:\nYou can use hive jdbc jar as well to connect with impala , just use the port of impala rather hive in jdbc url.","Q_Score":2,"Tags":"java,python,jdbc,impala,jaydebeapi","A_Id":54871799,"CreationDate":"2019-02-25T16:06:00.000","Title":"Impala driver class not being found through Jaydebeapi Connection","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Instead of creating many topics I'm creating a partition for each consumer and store data using a key. So is there a way to make a consumer in a consumer group read from partition that stores data of a specific key. If so can you suggest how it can done using kafka-python (or any other library).","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":205,"Q_Id":54878692,"Users Score":0,"Answer":"Instead of using the subscription and the related consumer group logic, you can use the \"assign\" logic (it's provided by the Kafka consumer Java client for example).\nWhile with subscription to a topic and being part of a consumer group, the partitions are automatically assigned to consumers and re-balanced when a new consumer joins or leaves, it's different using assign.\nWith assign, the consumer asks to be assigned to a specific partition. It's not part of any consumer group. It's also mean that you are in charge of handling rebalancing if a consumer dies: for example, if consumer 1 get assigned partition 1 but at some point it crashes, the partition 1 won't be reassigned automatically to another consumer. It's up to you writing and handling the logic for restarting the consumer (or another one) for getting messages from partition 1.","Q_Score":0,"Tags":"python,apache-kafka,kafka-consumer-api,kafka-python","A_Id":54879760,"CreationDate":"2019-02-26T04:59:00.000","Title":"Can a consumer read records from a partition that stores data of particular key value?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to merge two PDFs using PyPDF2.  Sometimes I run into the following error:\n[WinError 32] The process cannot access the file because it is being used by another process:\nHow can I determine which process is using the file?\nThank you","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":206,"Q_Id":54888188,"Users Score":0,"Answer":"You might have already tried this, but try to find the handle or the DLL ; a dialogue box will open and allow you to search for the missing file. If you want to open a file in Python, search up a file handling cheat-sheet. It doesn't require any importing of modules, just the Open() function. Glad to help if i did","Q_Score":1,"Tags":"python,windows,filesystems","A_Id":54888544,"CreationDate":"2019-02-26T14:51:00.000","Title":"How to determine which process is using a file?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm writing an application in PyQt5 which will be used for calibration and test of a product. The important details:\n\nThe product under test uses an old-school UART\/serial communication link at 9600 baud.\n...and the test \/ calibration operation involves communicating with another device which has a UART\/serial communication link at 300 baud(!)\nIn both cases, the communication protocol is ASCII text with messages terminated by a newline \\r\\n.\n\nDuring the test\/calibration cycle the GUI needs to communicate with the devices, take readings, and log those readings to various boxes in the screen. The trouble is, with the slow UART communications (and the long time-outs if there is a comms drop-out) how do I keep the GUI responsive?\nThe Minimally Acceptable solution (already working) is to create a GUI which communicates over the serial port, but the user interface becomes decidedly sluggish and herky-jerky while the GUI is waiting for calls to serial.read() to either complete or time out.\nThe Desired solution is a GUI which has a nice smooth responsive feel to it, even while it is transmitting and receiving serial data.\nThe Stretch Goal solution is a GUI which will log every single character of the serial communications to a text display used for debugging, while still providing some nice \"message-level\" abstraction for the actual logic of the application.\nMy present \"minimally acceptable\" implementation uses a state machine where I run a series of short functions, typically including the serial.write() and serial.read() commands, with pauses to allow the GUI to update. But the state machine makes the GUI logic somewhat tricky to follow; the code would be much easier to understand if the program flow for communicating to the device was written in a simple linear fashion.\nI'm really hesitant to sprinkle a bunch of processEvents() calls throughout the code. And even those don't help when waiting for serial.read(). So the correct solution probably involves threading, signals, and slots, but I'm guessing that \"threading\" has the same two Golden Rules as \"optimization\": Rule 1: Don't do it. Rule 2 (experts only): Don't do it yet.\nAre there any existing architectures or design patterns to use as a starting point for this type of application?","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":397,"Q_Id":54898967,"Users Score":0,"Answer":"Okay for the past few days I've been digging, and figured out how to do this. Since there haven't been any responses, and I do think this question could apply to others, I'll go ahead and post my solution. Briefly:\n\nYes, the best way to solve this is with with PyQt Threads, and using Signals and Slots to communicate between the threads.\nFor basic function (the \"Desired\" solution above) just follow the existing basic design pattern for PyQt multithreaded GUI applications:\n\n\nA GUI thread whose only job is to display data and relay user inputs \/ commands, and,\nA worker thread that does everything else (in this case, including the serial comms).\n\nOne stumbling point along the way: I'd have loved to write the worker thread as one linear flow of code, but unfortunately that's not possible because the worker thread needs to get info from the GUI at times.\n\n\nThe only way to get data back and forth between the two threads is via Signals and Slots, and the Slots (i.e. the receiving end) must be a callable, so there was no way for me to implement some type of getdata() operation in the middle of a function. Instead, the worker thread had to be constructed as a bunch of individual functions, each one of which gets kicked off after it receives the appropriate Signal from the GUI.\n\nGetting the serial data monitoring function (the \"Stretch Goal\" above) was actually pretty easy -- just have the low-level serial transmit and receive routines already in my code emit Signals for that data, and the GUI thread receives and logs those Signals.\n\nAll in all it ended up being a pretty straightforward application of existing principles, but I'm writing it down so hopefully the next guy doesn't have to go down so many blind alleys like I did along the way.","Q_Score":0,"Tags":"python,pyqt5","A_Id":54964121,"CreationDate":"2019-02-27T05:59:00.000","Title":"How to architect a GUI application with UART comms which stays responsive to the user","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":1,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I've been given a simple file-conversion task: whenever an MP4 file is in a certain directory, I do some magic to it and move it to a different directory. Nice and straightforward, and easy to automate.\nHowever, if a user is copying some huge file into the directory, I worry that my script might catch it mid-copy, and only have half of the file to work with.\nIs there a way, using Python 3 on Windows, to check whether a file is done copying (in other words, no process is currently writing to it)?\nEDIT: To clarify, I have no idea how the files are getting there: my script just needs to watch a shared network folder and process files that are put there. They might be copied from a local folder I don't have access to, or placed through SCP, or downloaded from the web; all I know is the destination.","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":715,"Q_Id":54917025,"Users Score":0,"Answer":"you could try first comparing the size of the file initially, or alternatively see if there are new files in the folder, capture the name of the new file and see if its size increases in x time, if you have a script, you could show the code....","Q_Score":0,"Tags":"python,windows,file,copy","A_Id":54917942,"CreationDate":"2019-02-28T01:29:00.000","Title":"How do I know if a file has finished copying?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"So i have a python script that automate some checks and send a mail when finished.\nI start the script with windows scheduler every night.\nI want to log if the script ran from the scheduler or if someone ran it manualy from an IDE(PyCharm for my case)\nIs there any os method that returns how a script ran or something else maybe?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":50,"Q_Id":54921887,"Users Score":4,"Answer":"while scheduling from windows scheduler you can send a command line argument, then check it in your code if it is started with specified command line argument then it is run from windows scheduler.","Q_Score":3,"Tags":"python,python-3.x,scheduler","A_Id":54922097,"CreationDate":"2019-02-28T09:04:00.000","Title":"Can my python script know if it started manualy from IDE or automatically from scheduler?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a requirement where I have to use the Python libraries I created on my machine, in the cloud, such that whenever any new dataset is loaded, this Python library have to start acting on it.\nHow can I do this? Where will I put the dataset and the python codes in Azure?\nThanks,\nShyam","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":73,"Q_Id":54922056,"Users Score":1,"Answer":"There are more possibility to do that.\n\nRun your Python code on Azure Web Apps for Containers\u2014a Linux-based, managed application platform\nAzure Functions allows running Python code in a serverless environment that scales on-demand.\nUse a managed Hadoop and Spark cluster with Azure HDInsights, suitable for enterprise-grade production workloads.\nUse a friction-free data science environment that contains popular tools for data exploration, modeling, and development activities.\nAzure Kubernetes Service (AKS) offers a fully-managed Kubernetes cluster to run your Python apps and services, as well as any other Docker container. Easily integrate with other Azure services using Open Service Broker for Azure.\nUse your favorite Linux distribution, such as Ubuntu, CentOS, and Debian, or Windows Server. Run your code with scalable Azure Virtual Machines and Virtual Machine Scale Sets.\nRun your own Python data science experiments using a fully-managed Jupyter notebook with Azure Notebooks.\n\nThe easiest and fastest way to run your code is 1. option. Create a web app and a web job in there.","Q_Score":0,"Tags":"python,azure","A_Id":54922252,"CreationDate":"2019-02-28T09:14:00.000","Title":"Python libraries in Azure","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have created a Python program which takes 3 to 4 hours to complete its execution when I run it interactively.\nIs there any way to run this program in Batch(Background) ?... i.e. Even when I shutdown my machine it will run as expected.","AnswerCount":4,"Available Count":1,"Score":0.049958375,"is_accepted":false,"ViewCount":133,"Q_Id":54923095,"Users Score":1,"Answer":"You can use windows task scheduler, simply set up time trigger or a startup trigger and the action should be your python file.","Q_Score":0,"Tags":"python","A_Id":54923195,"CreationDate":"2019-02-28T10:08:00.000","Title":"How can we create Python program which will run even after system shutdown","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have developed a Tensorflow based machine learning model on local Machine. And I want to deploy it in Google Cloud Platform (Cloud ML Engine) for predictions.\nThe model reads input data from Google Bigquery and the output predictions has to be written in Google Bigquery only. \nThere are some data preparation scripts which has to be run before the model prediction is run. I have used Google Cloud Storage for model storage and used it for deployment, i have deployed it successfully. \nBut, instead of using Google Cloud Storage for saving a model (i.e. .pb or .pkl model file) can i store it on GCP VM (Or Local machine) and call it from Cloud ML Engine for prediction? Is it possible? or I have only a option to upload Model directory to a Cloud Storage bucket which i will use it for prediction?\nCould you please help me on this.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":147,"Q_Id":54923211,"Users Score":0,"Answer":"For model deployment you need a Google Cloud Storage using AI Platform.\nAnother option is to use AI platform training (local or in GCP), output the model (SavedModel format) to a local folder or Cloud Storage and from there using TF Serving in Compute Engine Instance.","Q_Score":2,"Tags":"python,google-cloud-ml","A_Id":56553227,"CreationDate":"2019-02-28T10:14:00.000","Title":"Model Deployment On GCP Without Cloud Storage Bucket","Data Science and Machine Learning":1,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I installed Cython using apt-get install cython3. But when I run a script with Python 3 that tries to from Cython.Build import cythonize, I get the message ModuleNotFoundError: No module named 'Cython'\nWhat am I missing to run this script?","AnswerCount":1,"Available Count":1,"Score":0.3799489623,"is_accepted":false,"ViewCount":222,"Q_Id":54941599,"Users Score":2,"Answer":"Perhaps try to install Cython using pip by pip install cython.","Q_Score":0,"Tags":"python,cython","A_Id":54942038,"CreationDate":"2019-03-01T09:28:00.000","Title":"Cython installed but can't be imported","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm a beginner, I have really hit a brick wall, and would greatly appreciate any advice someone more advanced can offer.\nI have been having a number of extremely frustrating issues the past few days, which I have been round and round google trying to solve, tried all sorts of things to no avail.\nProblem 1)\nI can't import pygame in Idle with the error:\nModuleNotFoundError: No module named 'pygame' - even though it is definitely installed, as in terminal, if I ask pip3 to install pygame it says:\nRequirement already satisfied: pygame in \/usr\/local\/lib\/python3.7\/site-packages (1.9.4)\nI think there may be a problem with several conflicting versions of python on my computer, as when i type sys.path in Idle (which by the way displays Python 3.7.2 ) the following are listed:\n'\/Users\/myname\/Documents', '\/Library\/Frameworks\/Python.framework\/Versions\/3.7\/lib\/python37.zip', '\/Library\/Frameworks\/Python.framework\/Versions\/3.7\/lib\/python3.7', '\/Library\/Frameworks\/Python.framework\/Versions\/3.7\/lib\/python3.7\/lib-dynload', '\/Users\/myname\/Library\/Python\/3.7\/lib\/python\/site-packages', '\/Library\/Frameworks\/Python.framework\/Versions\/3.7\/lib\/python3.7\/site-packages'\nSo am I right in thinking pygame is in the python3.7\/sitepackages version, and this is why idle won't import it? I don't know I'm just trying to make sense of this. I have absoloutely no clue how to solve this,\"re-set the path\" or whatever. I don't even know how to find all of these versions of python as only one appears in my applications folder, the rest are elsewhere?\nProblem 2)\nApparently there should be a python 2.7 system version installed on every mac system which is vital to the running of python regardless of the developing environment you use. Yet all of my versions of python seem to be in the library\/downloaded versions. Does this mean my system version of python is gone? I have put the computer in recovery mode today and done a reinstall of the macOS mojave system today, so shouldn't any possible lost version of python 2.7 be back on the system now?\nProblem 3)\nWhen I go to terminal, frequently every command I type is 'not found'.\nI have sometimes found a temporary solution is typing:\nexport PATH=\"\/usr\/local\/bin:\/usr\/bin:\/bin:\/usr\/sbin:\/sbin\"\nbut the problems always return!\nAs I say I also did a system reinstall today but that has helped none!\nCan anybody please help me with these queries? I am really at the end of my tether and quite lost, forgive my programming ignorance please. Many thanks.","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":43,"Q_Id":54953355,"Users Score":0,"Answer":"You should actually add the  export PATH=\"\/usr\/local\/bin:\/usr\/bin:\/bin:\/usr\/sbin:\/sbin\" to your .bash_profile (if you are using bash). Do this by opening your terminal, verifying that it says \"bash\" at the top. If it doesn't, you may have a .zprofile instead. Type ls -al and it will list all the invisible files. If you have .bash_profile listed, use that one. If you have .zprofile, use that.\nType nano .bash_profile to open and edit the profile and add the command to the end of it. This will permanently add the path to your profile after you restart the terminal.\nUse ^X to exit nano and type Y to save your changes. Then you can check that it works when you try to run the program from IDLE.","Q_Score":0,"Tags":"python-3.x,macos,command-line,terminal,pygame","A_Id":72088835,"CreationDate":"2019-03-01T22:45:00.000","Title":"Pygame\/Python\/Terminal\/Mac related","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":1,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a python script that is using pygame to load sound and play them. When I run my script without sudo, it is working fine. But when I run the script with sudo, I get these errors:\n\nHome directory not accessible: Permission denied\nALSA lib pcm_mmap.c:341:(snd_pcm_mmap) mmap failed: Invalid argument\n\nDoes anyone have any idea on why this is happening? I would like to understand what's going on and not only get a quick fix in case this happens again in another context and because I might need to run the script with sudo.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":2784,"Q_Id":54955814,"Users Score":0,"Answer":"Apparently, pulseaudio won't work under root.\n\nThe OP had edited the question with this; posting it as an answer instead.","Q_Score":2,"Tags":"python,linux,pulseaudio","A_Id":65652874,"CreationDate":"2019-03-02T06:25:00.000","Title":"Home directory not accessible: Permission denied. Working fine without sudo","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am working with Jupyter notebook for some studying. I just updated all my python libraries and now when I start a new python notebook, it just continuously says connecting to kernel in yellow.\nDo I have to change something using my terminal to tell my mac to use the localhost? I have been trying to initiate an EC2 instance for another project, which I put on hold until I can figure out why that is not working, but now I can't connect locally anymore. \nSorry, I am so vague in my explanation but it is literally my first time trying to remote connect and now I think I might have messed up the paths or something. \nI am reading something about websockets on git? \nAny and all help is greatly appreciated!","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":1391,"Q_Id":54960778,"Users Score":0,"Answer":"I ended up uninstalling and reinstalling anaconda. This seems to have fixed it.","Q_Score":0,"Tags":"python-3.x,amazon-ec2,websocket,localhost,jupyter-notebook","A_Id":54962329,"CreationDate":"2019-03-02T16:51:00.000","Title":"Jupiter Notebook not connecting to Kernel","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am using a screen on my server. When I ask which python inside the screen I see it is using the default \/opt\/anaconda2\/bin\/python version which is on my server, but outside the screen when I ask which python I get ~\/anaconda2\/bin\/python. I want to use the same python inside the screen but I don't know how can I set it. Both path are available in $PATH","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":213,"Q_Id":54971247,"Users Score":1,"Answer":"You could do either one of the following:\n\nUse a virtual environment (install virtualenv). You can specify\nthe version of Python you want to use when creating the virtual\nenvironment with -p \/opt\/anaconda2\/bin\/python.\nUse an alias:\nalias python=\/opt\/anaconda2\/bin\/python.","Q_Score":0,"Tags":"python,anaconda,gnu-screen","A_Id":54980660,"CreationDate":"2019-03-03T16:50:00.000","Title":"Force screen session to use specific version of python","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a python script called script.py that takes in arguments and gives the output. Every time I use the script, I copy it to local working directory and then execute it as python script.py --arg1=a. I was wondering if there is a way to call the python function in local working directory without copying it, like how u can copy u c++ build files to \/usr\/local\/bin and call it from anywhere.\nThanks.","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":220,"Q_Id":54976307,"Users Score":2,"Answer":"You can try this steps: \n\nput #!\/usr\/bin\/python on the first line of your script. \nmaking it executable by using chmod +x script.py\nMove it to \/usr\/bin directory\n\nthen try to execute script.py in the terminal.","Q_Score":2,"Tags":"python","A_Id":54976388,"CreationDate":"2019-03-04T03:40:00.000","Title":"Calling a Python Function from local working directory","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a python package my-package that depends on a binary binary.exe but this binary is too big to be uploaded to pypi. Therefore I want to execute a bash script when the user does pip install ... that will wget the binary from my github and place it in their site-packages\/my-package folder. Is this possible? If so, how would I go about doing this?","AnswerCount":2,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":304,"Q_Id":54979251,"Users Score":1,"Answer":"There is no way. pip lags far behind real package namers like deb\/rpm; pip-installable packages are rather primitive ones, they don't have pre\/post-(un)install scripts.\nYou have to create your own installer using PyInstaller, py2exe, py2app or cx_Freeze. Or said deb\/rpm \u2014 there are plugins for setuptools to generate debs and rpms.","Q_Score":1,"Tags":"python,bash,dependencies,wget,pypi","A_Id":54983695,"CreationDate":"2019-03-04T08:26:00.000","Title":"Is it possible to execute a bash script to download non-python dependencies on `pip install my-package`","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I've done a lot of research but not sure if i understand correctly,\nThe considered \"best practice\" for deployment on docker is to have a single process per container.\nCouple of questions about it:\n\nThe meaning is that it's best to have a single service (for example, a single app), but this app can be have multiprocess architecture - right or wrong?\nIs there any actual limit on this in the container? For example if i \"ignore\" the advised best practices and try to spawn multiple processes in my app? will it fail?","AnswerCount":2,"Available Count":2,"Score":0.0996679946,"is_accepted":false,"ViewCount":818,"Q_Id":54989570,"Users Score":1,"Answer":"Dockers can run as many processes as the underlaying cgroup allow, there will be one foreground process where the stdout is the docker log. If that process stops, your container will stop. Best practice is to do one thing with your container that is isolated from the other services except where you define the interface. For instance open the port for the webservice. Doing one thing will make the docker images portable and potentially scalable.","Q_Score":2,"Tags":"python,docker,multiprocessing","A_Id":54989826,"CreationDate":"2019-03-04T18:42:00.000","Title":"Multiprocess architecture in docker","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I've done a lot of research but not sure if i understand correctly,\nThe considered \"best practice\" for deployment on docker is to have a single process per container.\nCouple of questions about it:\n\nThe meaning is that it's best to have a single service (for example, a single app), but this app can be have multiprocess architecture - right or wrong?\nIs there any actual limit on this in the container? For example if i \"ignore\" the advised best practices and try to spawn multiple processes in my app? will it fail?","AnswerCount":2,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":818,"Q_Id":54989570,"Users Score":2,"Answer":"[It's best practice...] to have a single service (for example, a single app).  TRUE\n[If I...]  try to spawn multiple processes in my app? will it fail?  NO\nThe considered \"best practice\" for deployment on docker is to have a single process per container.  NO - NOT NECESSARILY.\n\nThe idea is that your \"service\" should be as \"stripped down\" as possible; relying on OTHER \"services\" (possibly in other containers) as-needed.  Run as little in your container as you need - but no less.","Q_Score":2,"Tags":"python,docker,multiprocessing","A_Id":54989665,"CreationDate":"2019-03-04T18:42:00.000","Title":"Multiprocess architecture in docker","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"So I have this quite nice DAG in airflow which basically runs several analysis steps (implemented as airflow plugins) on binary files. A DAG is triggert by an ftp sensor which just checks if there is a new file on the ftp server and then starts the whole workflow. \nSo currently the workflow is like this: DAG is triggert as defined -> sensor waits for new file on ftp -> analysis steps are executed -> end of workflow. \nWhat I'd like to have is something like this: DAG is triggerts -> sensor waits for new file on ftp -> for every file on the ftp the analysis steps are executed individully -> each workflow ends individually. \nHow do I get the analysis workflow to be executed for each file on the ftp server and if there is no file on the server, just one sensor should wait for a new file? \nI don't want to e.g., start a DAG every second or so because then I have many sensors just waiting for a new file.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":971,"Q_Id":54992541,"Users Score":3,"Answer":"Use 2 DAGs to separate the sensing step from analysis steps.\nDAG 1: \nsensor waits for new file on ftp -> once new file lands, use TriggerDagRunOperator to trigger DAG 1 itself -> use TriggerDagRunOperator to trigger DAG 2\nDAG 2: \ndo the analysis steps for the file","Q_Score":4,"Tags":"python,airflow","A_Id":54992799,"CreationDate":"2019-03-04T22:26:00.000","Title":"Run airflow DAG for each file","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a Python script that I want to profile using vmprof to figure out what parts of the code are slow. Since PyPy is generally faster, I also want to profile the script while it is using the PyPy JIT. If the script is named myscript.py, how do you structure the command on the command line to do this?\nI have already installed vmprof using \n\npip install vmprof","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":69,"Q_Id":54994853,"Users Score":0,"Answer":"I would be suprised if it works, but the command is pypy -m vmprof myscript.py <your program args>. I would expect it to crash saying vmprof is not supported on windows.","Q_Score":0,"Tags":"python,command-line,profiling,pypy","A_Id":55011625,"CreationDate":"2019-03-05T03:08:00.000","Title":"How do you profile a Python script from Windows command line using PyPy and vmprof?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I need to retrieve the env variable $PS1 of the parent process (the shell) that calls the python program. $PS1 doesn't belong to os.environ inside the python process and sys.ps1 stores its own prompt.\nHow can we pass this variable to the program from the shell ?\nI invoke the program with : python3 program.py from the shell.","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":1489,"Q_Id":54998956,"Users Score":2,"Answer":"The python script can access all the environment variables through os.environ. Your problem is that PS1 is not an environment variable, but only a local variable of the shell.\nThat means that the shell does not pass it to its child in the environment (you can control that by typing env or printenv in your shell). So unless you manually put it in the environment before starting Python (export PS1 for sh or bash) you cannot get it in your Python script.","Q_Score":3,"Tags":"python,python-3.x,bash","A_Id":54999265,"CreationDate":"2019-03-05T09:00:00.000","Title":"Inheritance of env variables in python","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"OK\nI was afraid to use the terminal, so I installed the python-3.7.2-macosx10.9 package downloaded from python.org\nRan the certificate and shell profile scripts, everything seems fine.\nNow the \"which python3\" has changed the path from 3.6 to the new 3.7.2\nSo everything seems fine, correct?\nMy question (of 2) is what's going on with the old python3.6 folder still in the applications folder. Can you just delete it safely? Why when you install a new version does it not at least ask you if you want to update or install and keep both versions?\nSecond question, how would you do this from the terminal?\nI see the first step is to sudo to the root.\nI've forgotten the rest.\nBut from the terminal, would this simply add the new version and leave\nthe older one like the package installer?\nIt's pretty simple to use the package installer and then delete a folder.\nSo, thanks in advance. I'm new to python and have not much confidence \nusing the terminal and all the powerful shell commands.\nAnd yeah I see all the Brew enthusiasts. I DON'T want to use Brew for the moment.\nThe python snakes nest of pathways is a little confusing, for the moment.\nI don't want to get lost with a zillion pathways from Brew because it's\nconfusing for the moment.\nI love Brew, leave me alone.","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":27436,"Q_Id":55013809,"Users Score":0,"Answer":"Each version of the Python installation is independent of each other. So its safe to delete the version you don't want, but be cautious of this because it can lead to broken dependencies :-).\nYou can run any version by adding the specific version i.e $python3.6 or $python3.7\nThe best approach is to use virtual environments for your projects to enhance consistency. see pipenv","Q_Score":10,"Tags":"python,macos,installation,homebrew","A_Id":66958012,"CreationDate":"2019-03-06T00:43:00.000","Title":"How to update python 3.6 to 3.7 using Mac terminal","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am creating a Python class which should manage a Docker service via the Python Docker SDK.\nShould I start the Docker container in the constructor of my class or is it better to create a method start() which has to be manually called afterwards (and in the constructor only initialize the class attributes)?\nFor C++ there is the RAII idiom where the connection would be set up in the constructor, for Java I've always heard that the constructor should be light-weight and not do any calculations or other \"heavy\" stuff.\nWhat is the best way in Python?","AnswerCount":1,"Available Count":1,"Score":-0.1973753202,"is_accepted":false,"ViewCount":156,"Q_Id":55017256,"Users Score":-1,"Answer":"First of all I would like to highlight use of incorrect terminology here. Constructor and Initializer are two different things in Python. Constructors are implemented under the hood with __new__ method and it controls the creation of the object of a class. Initializer use __init__  method and controls the initlialization of the object after it has been created.\nIn almost all cases constructors are called implicitly using base class's implementation of __new__ and you rarely have a need to override it, however with initializer it is the exact opposite, because you would want to customize the object initialization after it has been created.\nNow coming to your question, it depends on how you want to control your application, I do not see any problem if you start the container in the initliazer of the class i.e. inside __init__. What this would do is as soon as the object is created it will fire up the docker container as well.\nHowever if you want to be more explicit about it and want to have separate instance methods for  start and stop, even that would not be a problem, its just that now you need to explicitly call the start method after the object has been created.","Q_Score":1,"Tags":"python,oop","A_Id":55017607,"CreationDate":"2019-03-06T06:53:00.000","Title":"Should Python constructors start services or only initialize variables?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm using Django and Python 3.7.  I want to write a script to help me easily migrate my application from my local machien (a Mac High Sierra) to a CentOS Linux instance.  I'm using a virtual environment in both places.  There are many things that need to be done here, but to keep the question specific, how do I determine on my remote machine (where I'm deploying my project to), what dependencies are lacking?  I'm using rsync to copy the files (minus the virtual environment)","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":63,"Q_Id":55035229,"Users Score":2,"Answer":"On the source system execute pip freeze > requirements.txt, then copy the requiremnts.txt to the target system and then on the target system install all the dependencies with pip install -r requirements.txt.  Of course you will need to activate the virtual environments on both systems before execute the pip commands.\nIf you are using a source code management system like git it is a good idea to keep the requirements.txt up to date in your source code repository.","Q_Score":1,"Tags":"django,python-3.x,centos,dependencies","A_Id":55035280,"CreationDate":"2019-03-07T02:42:00.000","Title":"How do I figure out what dependencies to install when I copy my Django app from one system to another?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"i created a small python program and freezed it to an *.exe file with the --noconsole option. When I run the program normally it works. But when I put it in the task scheduler that runs it on startup it does not work anymore.\nThe program has no ui. I know that it is not working because it is not writing to a log file. The paths in the program are absolute.\nAny ideas what can cause this problem?","AnswerCount":3,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":789,"Q_Id":55047805,"Users Score":0,"Answer":"You will need to do a little troubleshooting to narrow down the problem. I can share some tips.\n\nMake sure you have an exception handler for uncaught exceptions (at the very top) so you are logging those errors to a file. If you don't have one you will never know why your program is crashing. Make sure if you add this you are re-throwing the exception after logging it so the os knows it crashed.\nOpen the task schedule and run the task manually. Make sure the task is allowed to be ran manually (it's in the configuration). If it is allowed to run manually, then it should have no trouble running automatically.\nThe user you're running the task with might be different from the user you are manually running it with. You can try removing the --noconsole option while you are trying to figure out the problem. If it is an issue with your logger not having write access where it needs to, you would not see anything in your logs but can see messages in the console.\nMake sure the working directory of the task is correct. By default it should use the same directory the app is in, but if a path has been entered it can cause issues.","Q_Score":1,"Tags":"python,pyinstaller,taskscheduler","A_Id":55051337,"CreationDate":"2019-03-07T15:49:00.000","Title":"Pyinstaller *.exe in TaskScheduler","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"i created a small python program and freezed it to an *.exe file with the --noconsole option. When I run the program normally it works. But when I put it in the task scheduler that runs it on startup it does not work anymore.\nThe program has no ui. I know that it is not working because it is not writing to a log file. The paths in the program are absolute.\nAny ideas what can cause this problem?","AnswerCount":3,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":789,"Q_Id":55047805,"Users Score":0,"Answer":"thanks for the help. I found the problem. I was trying to get information of Duplicati (Backup Software), but the server does start only when somebody is logged in. So the problem was not my program but the start of this other program.\nSolved it through logging my program.","Q_Score":1,"Tags":"python,pyinstaller,taskscheduler","A_Id":55108790,"CreationDate":"2019-03-07T15:49:00.000","Title":"Pyinstaller *.exe in TaskScheduler","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Pycharm\nSSH->Remote docker\nWe are using a remote interpreter for python on Pycharm which works great on an SSH connection. We are in a phase to convert our main work on docker container. It is important for us to keep to the development process on the remote servers and not on the local computer. But it is also important to be able to do it over docker container, and not just ssh as this saves a lot of time and effort when starting a new development server.\nRemote docker -> Securely remote docker\nWhat we are seeking is a way to be able to make a remote docker connection within Pycharm securely.  It seems that when generating the Tls certificate, we need to bind it to the host IP's. This IP\/host bounding prevents us to quickly start new servers for development as this force to generate a certificate per IP.\nMy question, is it possible to make a secure connection for docker engine from Pycharm without bound the remote docker to its host IP?\nEdit:\nPossible option so far\nWild card certificate:\nAs Jan Garaj suggestions, use a wild card certificate. Then connect each new server to a new subdomain. The wild card will be the same for each of them.\nPros: This suppose to do the trick\nCons: It requires to set up a new subdomain for each server\nSSH tunnle\nSet the docker socket to allow connection from localhost. Then each developer can set up an ssh tunnel from his computer to the remote machine. In Pycharm setup python interpeter  to  docker socket via localhost with the same port as the tunnel.","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":376,"Q_Id":55049331,"Users Score":1,"Answer":"Use (= buy or create\/install\/use own CA + generate) wildchar TLS certificate, which will cover all current servers and also any new servers.","Q_Score":3,"Tags":"python,python-3.x,docker,pycharm","A_Id":55050534,"CreationDate":"2019-03-07T17:07:00.000","Title":"How to setup a secure connection on remote docker on remote server with pycharm","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I installed both 'Python 3.7' and 'Anaconda', with adding the installation directories into environmental variable 'PATH'. And now when calling 'python' in windows' cmd, it turned out to be the 'Anaconda' one. Is there any possibility to call another one directly in cmd?\nThanks a lot!","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":36,"Q_Id":55059890,"Users Score":1,"Answer":"Try launching it through C:\\Python37\\python.exe from cmd. Basically the path is the installation folder of Python 3.7.","Q_Score":0,"Tags":"python,windows,environment-variables","A_Id":55060242,"CreationDate":"2019-03-08T09:08:00.000","Title":"About the files named identically in different directories in environmental variable 'PATH'","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm trying to poll an HTML API endpoint for new data, and only execute the DAG if new data is present.\nI have a sensor with a standard poke function that will return True if this is the case.\nI'm wondering if it is possible to avoid having the task scheduled, and only execute the task when the sensor returns true? Currently, I'm running the DAG daily and have the sensor timeout after 24h (so there is only ever one concurrently running DAG). However, in case new data comes in twice per day, it will have to wait until the next DAG run to be processed.","AnswerCount":2,"Available Count":1,"Score":0.2913126125,"is_accepted":false,"ViewCount":1613,"Q_Id":55069341,"Users Score":3,"Answer":"You can use 1 DAG dedicated to sensing. And use another dag to do processing.\n\nSensing DAG:\nsensor keeps poking -> once poke() returns true, use TriggerDagRunOperator to trigger Sensing DAG -> use TriggerDagRunOperator to trigger Processing DAG\n\nProcessing DAG:\nprocess whatever you want","Q_Score":2,"Tags":"python,airflow","A_Id":55072527,"CreationDate":"2019-03-08T18:54:00.000","Title":"Using an Airflow sensor to start a DAG run","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I attempted to use fbprophet for time series analysis using Python.\nI ran from fbprophet import Prophet but got No module named 'fbprophet'\nI think fbprophet is not part of packages that comes with anaconda distribution\nI went ahead to install fbprophet but got this error message No module named 'fbprophet'\nI am on Windows 10, 64 bits\nI install anaconda distribution of anaconda 3.7\nI have ran conda install -c conda-forge fbprophet and conda install -c conda-forge\/label\/cf201901 fbprophet on my anaconda prompt which it rolled endlessly\nI have also ran pip install fbprohet which did not work as well\nI ran pip list which worked but prophet or fbprophet not among the list\nI have searched this site for relevant questions and tried all what I clues I got in it but did not work for me.","AnswerCount":8,"Available Count":4,"Score":0.0,"is_accepted":false,"ViewCount":19148,"Q_Id":55078483,"Users Score":0,"Answer":"you just search the wrong letter, please enter pip search fbprophet,in the way, i can get two","Q_Score":4,"Tags":"python,python-3.x,installation,facebook-prophet","A_Id":55078819,"CreationDate":"2019-03-09T14:43:00.000","Title":"How to install fbprophet for Python 3.7 (anaconda distribution)","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I attempted to use fbprophet for time series analysis using Python.\nI ran from fbprophet import Prophet but got No module named 'fbprophet'\nI think fbprophet is not part of packages that comes with anaconda distribution\nI went ahead to install fbprophet but got this error message No module named 'fbprophet'\nI am on Windows 10, 64 bits\nI install anaconda distribution of anaconda 3.7\nI have ran conda install -c conda-forge fbprophet and conda install -c conda-forge\/label\/cf201901 fbprophet on my anaconda prompt which it rolled endlessly\nI have also ran pip install fbprohet which did not work as well\nI ran pip list which worked but prophet or fbprophet not among the list\nI have searched this site for relevant questions and tried all what I clues I got in it but did not work for me.","AnswerCount":8,"Available Count":4,"Score":0.0,"is_accepted":false,"ViewCount":19148,"Q_Id":55078483,"Users Score":0,"Answer":"First install\npip install httpstan\nThen Install\npip install pystan\nThen Install\npip install fbprophet","Q_Score":4,"Tags":"python,python-3.x,installation,facebook-prophet","A_Id":70970526,"CreationDate":"2019-03-09T14:43:00.000","Title":"How to install fbprophet for Python 3.7 (anaconda distribution)","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I attempted to use fbprophet for time series analysis using Python.\nI ran from fbprophet import Prophet but got No module named 'fbprophet'\nI think fbprophet is not part of packages that comes with anaconda distribution\nI went ahead to install fbprophet but got this error message No module named 'fbprophet'\nI am on Windows 10, 64 bits\nI install anaconda distribution of anaconda 3.7\nI have ran conda install -c conda-forge fbprophet and conda install -c conda-forge\/label\/cf201901 fbprophet on my anaconda prompt which it rolled endlessly\nI have also ran pip install fbprohet which did not work as well\nI ran pip list which worked but prophet or fbprophet not among the list\nI have searched this site for relevant questions and tried all what I clues I got in it but did not work for me.","AnswerCount":8,"Available Count":4,"Score":0.0,"is_accepted":false,"ViewCount":19148,"Q_Id":55078483,"Users Score":0,"Answer":"fbprophet did not work on Python 3.9\nIt is a very important information, after downgrading Python from 3.9 to 3.8, I use 'conda install fbprophet' install fbprophet successfully","Q_Score":4,"Tags":"python,python-3.x,installation,facebook-prophet","A_Id":72025011,"CreationDate":"2019-03-09T14:43:00.000","Title":"How to install fbprophet for Python 3.7 (anaconda distribution)","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I attempted to use fbprophet for time series analysis using Python.\nI ran from fbprophet import Prophet but got No module named 'fbprophet'\nI think fbprophet is not part of packages that comes with anaconda distribution\nI went ahead to install fbprophet but got this error message No module named 'fbprophet'\nI am on Windows 10, 64 bits\nI install anaconda distribution of anaconda 3.7\nI have ran conda install -c conda-forge fbprophet and conda install -c conda-forge\/label\/cf201901 fbprophet on my anaconda prompt which it rolled endlessly\nI have also ran pip install fbprohet which did not work as well\nI ran pip list which worked but prophet or fbprophet not among the list\nI have searched this site for relevant questions and tried all what I clues I got in it but did not work for me.","AnswerCount":8,"Available Count":4,"Score":0.0,"is_accepted":false,"ViewCount":19148,"Q_Id":55078483,"Users Score":0,"Answer":"Use conda install gcc to set up gcc. The easiest way to install Prophet is through conda-forge: conda install -c conda-forge prophet.","Q_Score":4,"Tags":"python,python-3.x,installation,facebook-prophet","A_Id":72432495,"CreationDate":"2019-03-09T14:43:00.000","Title":"How to install fbprophet for Python 3.7 (anaconda distribution)","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Is it possible to execute short python expressions in one line in terminal, without passing a file? \ne.g. (borrowing from how I would write an awk expression)\npython 'print(\"hello world\")'","AnswerCount":4,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":215,"Q_Id":55101575,"Users Score":3,"Answer":"python3 -c \"print('Hello')\"\nUse the -c flag as above.","Q_Score":0,"Tags":"python,terminal","A_Id":55101619,"CreationDate":"2019-03-11T12:10:00.000","Title":"Running python directly in terminal","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Is it possible to execute short python expressions in one line in terminal, without passing a file? \ne.g. (borrowing from how I would write an awk expression)\npython 'print(\"hello world\")'","AnswerCount":4,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":215,"Q_Id":55101575,"Users Score":0,"Answer":"For completeness, I found you can also feed a here-string to python. \npython <<< 'print(\"hello world\")'","Q_Score":0,"Tags":"python,terminal","A_Id":55103516,"CreationDate":"2019-03-11T12:10:00.000","Title":"Running python directly in terminal","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a python application that I've created an executable of, using pyinstaller. The entire python interpreter is packaged into the executable with all its pip dependencies.\nSo now my application can run in environments where python or python modules may not be installed, but there are still some dependencies:\n1) MongoDB - This is the database my application uses, and it needs to be installed on a system for it to work of course.\n2) Mosquitto - This service is required because the application uses MQTT to receive\/send commands.\nMy current method of handling this is to use a shell script which installs mongodb and mosquitto the first time when my application is deployed somewhere. I just discovered docker, and I was wondering if it is capable of packaging these 'external' dependencies into a docker image?\nIs it possible for me to have one standalone \"thing\" which will run in any environment regardless of whether mongoDB or mosquitto are installed there?\nAnd how exactly would I go about doing this?\n(Unrelated but this application is meant to run on a raspberry pi)","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":1200,"Q_Id":55116677,"Users Score":1,"Answer":"If you adopted Docker here:\nYou'd still have to \"separately\" run the external services; they couldn't be packaged into a single artifact per se.  There's a standard tool called Docker Compose that provides this capability, though, and you'd generally distribute a docker-compose.yml file that describes how to run the set of related containers.\nIt's unusual to distribute a Docker image as files; instead you'd push your built image to a registry (like Docker Hub, but the major public-cloud providers offer this as a hosted service, there are a couple of independent services, or you can run your own).  Docker can then retrieve the image via HTTP.\nDocker containers can only be run by root-equivalent users.  Since you're talking about installing databases as part of your bringup process this probably isn't a concern for you, but you could run a plain-Python or pyinstallered application as an ordinary user.  Anyone who can run any Docker command has unrestricted root-level access on the host.","Q_Score":1,"Tags":"python,mongodb,docker,pyinstaller","A_Id":55119757,"CreationDate":"2019-03-12T08:04:00.000","Title":"Python: Question about packaging applications docker vs pyinstaller","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"This is a total newbie question, but I installed conda along with a bunch of other stuff like Tensorflow with a virtual environment, and now I'm a little confused.  If I open a terminal my python is pointing to \/usr\/bin\/python.  If I go to the base environment (\"conda activate base\"), my path points to where I installed anaconda, \/usr\/local\/anaconda2.  Does conda expect that I always go into the base environment to use all the anaconda packages, or did I do something weird on my install that my non-environment still points to the original system python?  Should I just change my path to point to anaconda? I'm on Ubuntu 18.10.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":2114,"Q_Id":55133808,"Users Score":0,"Answer":"I am a fan of being explicit -- instead of running python at the command line, I use the full path to the python interpreter when running scripts (e.g. \/usr\/local\/anaconda2\/bin\/python) -- this way I don't rely on the shell behavior or having to worry about which environment is currently active. Running the interpreter using its full path is no different than just running python while the environment is active.\nBut that's not everbody's cup of tea... So...\nEven if anaconda did not prompt you to update your PATH variable, you can do it explicitly by updating your .bashrc or .bash_profile (or .zshrc or whatever else) by adding this line: PATH=\/usr\/local\/anaconda2\/bin${PATH}. Dont forget to re-source the .bashrc or close\/reopen your shell for it to take effect.\nConda is capable of creating many virtual environments beyond the base, so if you have more than one and you want to set one as the default, then just update the line above for the appropriate path.","Q_Score":4,"Tags":"python,anaconda","A_Id":55134899,"CreationDate":"2019-03-13T03:16:00.000","Title":"With conda\/anaconda should I work in (base) all the time?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I\u2019ve been using the Luigi visualizer for pipelining my python code.\nNow I\u2019ve started using an aws instance, and want to access the visualizer from my own machine.\nAny ideas on how I could do that?","AnswerCount":2,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":163,"Q_Id":55134741,"Users Score":1,"Answer":"We had the very same problem today on GCP, and solved with the following steps:\n\nsetting firewall rules for incoming TCP connections on port used by the service (which by default is 8082);\ninstalling apache2 server on the instance with a site.conf configuration that resolve incoming requests on ip-of-instance:8082.\n\nThat's it. Hope this can help.","Q_Score":1,"Tags":"python,amazon-web-services,luigi","A_Id":55143381,"CreationDate":"2019-03-13T05:05:00.000","Title":"Accessing Luigi visualizer on AWS","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I can't seem to find any resources that state whether or not some popular OGMs can be used with neptune instead of writing raw gremlin queries for example.\nWould any of you know what OGMs are supported or can be used with Neptune and which would you recommend for python in particular?\nAlso, would it be better to use an OGM (like goblin for example) or stick to the gremlin python GVL instead?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":225,"Q_Id":55137417,"Users Score":0,"Answer":"Goblin claims that its TP 3.2.4 compatible, but I don't see any mention of its plan to be in sync with newer TP versions. GLV's ensure that you always have a compatibility with any TP version that has been released. They need not work across versions (ie. GLV v3.2.4 might not work peacefully with a TP 3.3.0 server) but you be sure that there will be a GLV for each official release of TP. \nBarring that, I don't see any concerns using an OGM. Its a different paradigm at the end of the day and should not be a concern apart from the version compatibility that I called out before. I've not tried it in person, so do let me know how it goes! Good luck.","Q_Score":1,"Tags":"python,amazon-web-services,gremlin,amazon-neptune,goblin","A_Id":56302721,"CreationDate":"2019-03-13T08:34:00.000","Title":"Using an OGM with AWS Neptune","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"is there any way to prevent the user from closing the cmd window of a python script on windows or maybe just disable the (X) close button ?? I have looked for answers already but i couldn't find anything that would help me","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":306,"Q_Id":55151495,"Users Score":0,"Answer":"I dont think its possible, what you can do instead is to not display the cmd window (backgroundworker) and make it into a hidden process with system rights so that it cant be shutdown until it finishes.","Q_Score":2,"Tags":"python,python-3.x,windows,python-2.7,cmd","A_Id":55151598,"CreationDate":"2019-03-13T21:29:00.000","Title":"how can i prevent the user from closing my cmd window in a python script on windows","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a script that uses tabula.read_pdf. Script works fine, however when I build an exe file with PyInstaller (with --noconsole option) and run my script - it opens java.exe empty console window which stays opened untill script work is done. \nHow can I avoid it?\nThanks","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":258,"Q_Id":55164352,"Users Score":0,"Answer":"I have managed to fix it by changing java to javaw in wrapper.py file. Thanks.","Q_Score":1,"Tags":"python,pyinstaller,tabula","A_Id":55179237,"CreationDate":"2019-03-14T13:55:00.000","Title":"Python tabula read_pdf opens java console window","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":1},{"Question":"I have a script that uses tabula.read_pdf. Script works fine, however when I build an exe file with PyInstaller (with --noconsole option) and run my script - it opens java.exe empty console window which stays opened untill script work is done. \nHow can I avoid it?\nThanks","AnswerCount":2,"Available Count":2,"Score":0.0996679946,"is_accepted":false,"ViewCount":258,"Q_Id":55164352,"Users Score":1,"Answer":"I was running into a similar issue and couldn't really find the wrapper.py. After some tinkering around I found a similar workaround:\nWithin the directory where tabula is installed \"...\\Lib\\site-packages\\tabula\" edit the \"io.py\" file. In the \"_run\" function just change the \"args\" variable to use \"javaw\" instead of \"java\".\nI was able to hide the java console when my .exe file ran this way. I hope this helps someone in the future.","Q_Score":1,"Tags":"python,pyinstaller,tabula","A_Id":70838257,"CreationDate":"2019-03-14T13:55:00.000","Title":"Python tabula read_pdf opens java console window","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":1},{"Question":"I installed Tornado\nsudo easy_install tornado\nthen it got a lot of syntax errors.\nI want to uninstall Tornado\npip uninstall tornado\nThen it asks: \nUninstalling tornado-6.0.1:\n  Would remove:\n    \/Library\/Python\/2.7\/site-packages\/tornado-6.0.1-py2.7-macosx-10.13-intel.egg\nProceed (y\/n)? \nI typed y,\nthen it says\nException:\nTraceback (most recent call last):\n  File \"\/Library\/Python\/2.7\/site-packages\/pip-18.0-py2.7.egg\/pip\/_internal\/basecommand.py\", line 141, in main\n    status = self.run(options, args)\n...","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":2082,"Q_Id":55169254,"Users Score":0,"Answer":"Try to uninstall it with \"easy_install -m tornado\"","Q_Score":0,"Tags":"python,tornado","A_Id":55169326,"CreationDate":"2019-03-14T18:03:00.000","Title":"Can't uninstall Tornado with pip","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I run calculations on Windows for hours and would like to have the calculation report\/log inside the interactive IDLE\/shell window be saved to a file at the end by a command.\nWould be nice to exit() and close the window too.\nAs much as I like Linux, this is an Unattended Windows machine, hence, some modules\/commands are not available, sadly, and the ability to install other software is limited. \nThe fact that the developers did not think of a command to save the transactions within the IDLE\/shell is surprising. \nI know in some environments you can direct the output of a job, like a report to another text file by using the key -o, --o, --output, > to a text file. Surprisingly Python does not support anything like that! \nAny help would be appreciated \nThanks","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":833,"Q_Id":55173483,"Users Score":0,"Answer":"Windows Command Prompt supports stdout redirection and probably stderr redirection. I just tested python -c \"print(test)\" > F:\/dev\/tem\/out.txt and the print out went to out.txt. Replace -c \"print('test') with script.py and the same should happen. Piping stdout of one program to stdin of another might work. You might be able to chain programs with a .bat file. PowerShell likely is more powerful and flexible, but I have never used it.\nI am not completely clear on what you are asking, but I hope the following answers your questions.\nPython runs in 2 modes: batch and interactive.  Interactive mode is intended for ephermeral interaction with a human.  Batch mode is for unattended computation, with occasional screen messages, but with most results sent to a file other than the screen.  Both modes are combined when you run python -i xyz.py.  The file is first run in batch mode, and then Python shifts to interactive mode.\nIt sounds like you should be using batch mode rather than either Python's or IDLE's interactive mode.  If your code runs from IDLE, you should be able to run it directly with  the same python.exe that you used to run IDLE.  There are exceptions, of course, if one makes one's code dependent on running within IDLE, but this is unlikely to be an accident or to be needed for unattended running.\nThe IDLE Shell simulates interactive Python.  When a file is run from an editor window, IDLE simulates python -i file-being-edited.py, with screen output going to Shell.  In either case, an interactive user can save the contents of Shell with the File => Save As menu command.  So there is such a command.  There are also close window and exit commands and shortcuts.\nIn IDLE's intended use, as an interactive python learning and program development environment, there is no need from for a program to issue these commands.  To save data in a file, a program can open a file and write data directly.","Q_Score":0,"Tags":"windows,python-2.7,history,python-idle","A_Id":55191917,"CreationDate":"2019-03-14T23:26:00.000","Title":"How to save a Python 2 idle\/shell\/command prompt interactive session on Windows?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm having trouble with my PATH and can't seem to find an answer anywhere.\nI'm using a virtualenv on my Mac, and when I call which pip, it confirms this - but when I pip install anything, it dumps it into my 'usr\/local' path.\nI have export PATH=\/usr\/local\/bin:$PATH added to my .bash_profile to ensure that user-installed binaries take precedence, but I have {\n   \"python.pythonPath\": \"\/Virtualenvs\/py3\/bin\/python3.7\"\n} added in my VSCode settings.json to ensure the right path from there.\nMore specifically, calling which pip returns:\n\/Users\/username\/Virtualenvs\/py3\/bin\/pip\nBut pip install telegramreturns:\nRequirement already satisfied: telegram in \/usr\/local\/lib\/python3.7\/site-packages (0.0.1)\nAny ideas on why this might be happening?","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":932,"Q_Id":55175707,"Users Score":0,"Answer":"Try pip --user to install it to particular user directories","Q_Score":0,"Tags":"python-3.x,path,visual-studio-code,pip","A_Id":55175773,"CreationDate":"2019-03-15T04:46:00.000","Title":"'pip' installs to wrong directory, even though it's set correctly in PATH","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a project running on a docker container and another running on a vagrant machine, when I try in to go to definition in that two projects, I receive this message ex: \"No definition found for 'BaseUserManager'. \", for all plugins that I have installed on that machines I get the same message.\nPS: Go to definition just work on my local workspace.\ncan you guys help me to solve this problem please?, I really like vscode and I don't wanna quit the editor because of this issue.","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":186,"Q_Id":55184921,"Users Score":1,"Answer":"The source has to be local for the extensions to be able to read the files to analyze the source.","Q_Score":1,"Tags":"python,django,docker,visual-studio-code,vagrant","A_Id":55189303,"CreationDate":"2019-03-15T14:32:00.000","Title":"Go to definition is not working with docker and vagrant","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Is there any way to use the python extension to edit files that reside on a remote server? I have tried NFS and remoteFS, but I do not see any way to get Intellisense working using the remote installation. I normally edit and test on a windows machine, while the target runs on Linux. \nI realise this is not limited to this extension, but is a more general issue.","AnswerCount":5,"Available Count":1,"Score":0.0399786803,"is_accepted":false,"ViewCount":2885,"Q_Id":55189055,"Users Score":1,"Answer":"As a workaround, I'm using a Linux Hosted virtual machine which has a similar setup as the target. This works surprisingly well. It is a shame VMware 12 removed support for unity.","Q_Score":3,"Tags":"python,visual-studio-code","A_Id":55489593,"CreationDate":"2019-03-15T18:52:00.000","Title":"Visual Studio Code use on remote files","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"In simple python CLI script, I created a memory buffer with Byteio and wrote some data there. I call it from the terminal.\nLet's say my program is in progress for one hour. \nCan python interpreter implicitly move my buffer from one logical memory location to another during program execution?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":102,"Q_Id":55196056,"Users Score":1,"Answer":"No. CPython's garbage collector doesn't do moving or compacting. The reason for that is that it provided direct references to objects to C extensions in the early versions (before 2.0), and move to indirect references or read barriers would break C extension compatibility.\nPyPy has a more efficient and advanced moving GC, since it doesn't maintain compatibility with C extensions.","Q_Score":0,"Tags":"python","A_Id":55245469,"CreationDate":"2019-03-16T11:05:00.000","Title":"Does python move buffers from one logical memory location to another?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Context: I have an app that serves interactive graphs and data analysis. In order to calculate plots and data summaries, it uses a dataset that is loaded upon App initialization by querying google BigQuery. The data is then kept as a global variable (in memory) and is used in all data calculations and plots that might be run by different users (each user saves in their session their own filters\/mask). \nThis dataset changes in BigQuery once per day during the night (I know the exact datetime of refresh). Once the data is refreshed in BigQuery, I want the global variable of the dataset to be refreshed. \nI know that the proper solution would be to call a Database on each user request, but BigQuery high delay on requests doesn't make this a good solution, and I can't use another DB.\nThe only solution I've came across so far is to restart the Google App Engine service (all instances) after BigQuery data refresh. Please note that this should be a scheduled action, done programatically. \nMy questions:\n\nIn case restarting the service is the best possible solution, how should I be restarting the service?\nIn case there is another way to accomplish what I want, please let me know","AnswerCount":3,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":1633,"Q_Id":55203095,"Users Score":0,"Answer":"It's likely good practice to cache your dataset as you're doing; if you know the data hasn't changed. then there's no need to requery BigQuery for it.\nHowever, your dataset does change, just once per day.\nSo, I think your approach should be to revise your app so that it refreshes the cached copy of your BigQuery dataset every day and stop|block your users from querying the dataset as it changes.\nYou actually need only change the dataset if a user requests it (there's no need to refresh the dataset on days when no users need it), so, depending on the time the refresh takes and your users' expectations on latency, you could trigger the refresh by a user request: has the dataset changed? If so, block this request, refresh the data and then respond to the user.\nI assume you've already solved the problem that your users' data plots and calculations will differ for different datasets.","Q_Score":1,"Tags":"python-3.x,google-app-engine,google-api,gcloud","A_Id":55203379,"CreationDate":"2019-03-17T01:33:00.000","Title":"How to restart Google App Engine Standard Service","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"Uninstalled Anaconda Navigator last week and now it wont work once I've reinstalled it. \nWindows search doesn't find an anaconda navigator program but in C:\\Users\\admin\\Anaconda3\\pkgs\\anaconda-navigator-1.9.2-py37_0\\Scripts, there is a anaconda navigator application. When i open this, a command prompt box flashes and vanishes within 0.5 secs. \nC:\\Users\\admin>where conda\nReturns 'where is not a recognized internal or external command' \nconda update has same response as well as all other 'conda' calls\nHave uninstalled and ticked (and also unticked) the PATH option numerous times for both and hasn't worked. Have also tried clearing the PATH in the advanced section. \nBasically, I've tried all the other suggestions on SO and cant find anything which works. \nEdit: Calling python in the command prompt does work too - so python works but none of the anaconda options including spyder, jupyter etc etc. (RStudio does work in my computer though)\nCheers","AnswerCount":2,"Available Count":1,"Score":-0.0996679946,"is_accepted":false,"ViewCount":6127,"Q_Id":55222653,"Users Score":-1,"Answer":"I managed to solve the issue by doing the following:\n\nInstalling Microsoft Visual C++ 2015 - 2019 redistributable (x64) - 14.25. 28508\nAdd file: msvcp140.dll (follow tutorial in youtube)\nAdd file: msvcp140_1.dll","Q_Score":2,"Tags":"python,anaconda,conda","A_Id":61267845,"CreationDate":"2019-03-18T13:36:00.000","Title":"Anaconda Navigator Won't Open - Tried all other threads","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have made a code using pytesseract and whenever I run it, I get this error:\nTesseractNotFoundError: tesseract is not installed or it's not in your path\nI have installed tesseract using HomeBrew and also pip installed it.","AnswerCount":1,"Available Count":1,"Score":0.3799489623,"is_accepted":false,"ViewCount":2063,"Q_Id":55235369,"Users Score":2,"Answer":"If installed with Homebrew, it will be located in \/usr\/local\/bin\/tesseract by default. To verify this, run which tesseract in the terminal as Dmitrrii Z. mentioned.\nIf it's there, you can set it up in your python environment by adding the following line to your python script, after importing the library:\npytesseract.pytesseract.tesseract_cmd = r'\/usr\/local\/bin\/tesseract'","Q_Score":0,"Tags":"python,python-3.x,macos,tesseract,python-tesseract","A_Id":58385393,"CreationDate":"2019-03-19T07:09:00.000","Title":"Where is the tesseract executable file located on MacOS, and how to define it in Python?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"How to debug the code written in python in container using azure dev spaces for kubernetes ?","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":164,"Q_Id":55253980,"Users Score":0,"Answer":"Currently debugging in Azure Dev Spaces only lists Node.js, .NET Core, and Java as officially supported.  The documentation for how to debug these 3 types of environments was written pretty recently (Quickstarts published on 7\/7\/2019).  I am assuming that a guide for Python should be on the way shortly, but I have been unable to find any published timeline for this.","Q_Score":2,"Tags":"python,visual-studio,azure,kubernetes,containers","A_Id":57613177,"CreationDate":"2019-03-20T05:17:00.000","Title":"Azure dev spaces to debug python code running in kubernetes pod","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I've developed an application in Python with PyQt on Mac OS and I want to make .exe file for windows OS. How can I do this?\nI've tried in Ubuntu but it doesn't work. I'll be grateful for some useful assistance.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":10559,"Q_Id":55255421,"Users Score":0,"Answer":"Alright\u2026\nSo in Mac, there is a simple way to convert .py to .exe.\nIn terminal first open the file directory with the \u201ccd\u201d command\ni.e. cd Desktop\/MyFile\nThen run this code:\npyinstaller \u2014onefile name.py\nInstead of \u201cname.py\u201d put your own file.\nAfter that, in the same folder there will be created a  \u201cdist\u201d file, you can find the ready .exe there\u2026)","Q_Score":4,"Tags":"python,python-3.x,macos,py2exe,py2app","A_Id":68471783,"CreationDate":"2019-03-20T07:21:00.000","Title":"How to convert .py to .exe in Mac","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I need suggestions on how to speed up access to python programs when called from Golang.  I really need fast access time (very low latency).\nApproach 1:\nfunc main() {\n...\n...\n        cmd = exec.Command(\"python\", \"test.py\")\n        o, err = cmd.CombinedOutput()\n...\n}\nIf my test.py file is a basic print \"HelloWorld\" program, the execution time is over 50ms.  I assume most of the time is for loading the shell and python in memory.\nApproach 2:\nThe above approach can be speeded up substantially by having python start a HTTP server and then gaving the Go code POST a HTTP request and get the response from the HTTP server (python).  Speeds up response times to less than 5ms.\nI guess the main reason for this is probably because the python interpretor is already loaded and warm in memory.\nAre there other approaches I can use similar to approach 2 (shared memory, etc.) which could speed up the response from my python code?.  Our application requires extremely low latency and the 50 ms I am currently seeing from using Golang's exec package is not going to cut it.\nthanks,","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":235,"Q_Id":55271734,"Users Score":0,"Answer":"Approach 1: Simple HTTP server and client\nApproach 2: Local socket or pipe\nApproach 3: Shared memory\nApproach 4: GRPC server and client\nIn fact, I prefer the GRPC method by stream way, it will hold the connection (because of HTTP\/2), it's easy, fast and secure. And it's easy moving python node to another machine.","Q_Score":0,"Tags":"python,go,exec,low-latency","A_Id":55272973,"CreationDate":"2019-03-20T23:43:00.000","Title":"Speed up access to python programs from Golang's exec packaqe","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"In Windows I need to send an NBNS name query packet (which uses UDP protocol), and I need to send 255 packets and get an answer for each. With Scapy it takes a year, so I wanted to know if there is a way to speed it up or maybe use sockets instead?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":138,"Q_Id":55309306,"Users Score":0,"Answer":"You could use two threads, one that is sending packets using a conf.L3socket() socket from scapy and another thread that is receiving packets using sniff().","Q_Score":1,"Tags":"python-2.7,sockets,networking,scapy","A_Id":72091366,"CreationDate":"2019-03-23T00:07:00.000","Title":"Scapy send packets speed up in Windows","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I just installed Python and VScode yesterday. I was trying to use pip to install updates but the command python doesn't work. However py does. I'm wondering why this is and if there's a way to make the command python recognized.\nIn addition, I was wondering if there was a quicker way to run the terminal\/shortcut alternative to right-clicking then selecting Run Python File in Terminal.\nLastly, I wanted to understand if I messed up during installation, because when I ran setx PATH \"%PATH%;C:\\Python34\\Scripts\" then echo %PATH%, instead of a seeing C:\\Python34\\Scripts I see a huge block of paths like:\n\nC:\\Program Files (x86)\\Razer\\ChromaBroadcast\\bin;C:\\Program Files\\Razer\\ChromaBroadcast\\bin;C:\\Program Files (x86)\\Common Files\\Oracle\\Java\\javapath;C:\\Program Files (x86)\\Razer Chroma SDK\\bin;C:\\Program Files\\Razer Chroma SDK\\bin;C:\\ProgramData\\Oracle\\Java\\javapath;C:\\Windows\\system32;C:\\Windows;C:\\Windows\\System32\\Wbem;C:\\Windows\\System32\\WindowsPowerShell\\v1.0\\;C:\\Program Files (x86)\\NVIDIA Corporation\\PhysX\\Common;C:\\WINDOWS\\system32;C:\\WINDOWS;C:\\WINDOWS\\System32\\Wbem;C:\\WINDOWS\\System32\\WindowsPowerShell\\v1.0\\;C:\\Users\\yiyan\\AppData\\Local\\Microsoft\\WindowsApps;C:\\WINDOWS\\system32;C:\\WINDOWS;C:\\WINDOWS\\System32\\Wbem;C:\\WINDOWS\\System32\\WindowsPowerShell\\v1.0\\;C:\\WINDOWS\\System32\\OpenSSH\\;C:\\Program Files\\NVIDIA Corporation\\NVIDIA NvDLISR;C:\\Program Files (x86)\\Razer\\ChromaBroadcast\\bin;C:\\Program Files\\Razer\\ChromaBroadcast\\bin;C:\\Program Files (x86)\\Common Files\\Oracle\\Java\\javapath;C:\\Program Files (x86)\\Razer Chroma SDK\\bin;C:\\Program Files\\Razer Chroma SDK\\bin;C:\\ProgramData\\Oracle\\Java\\javapath;C:\\Windows\\system32;C:\\Windows;C:\\Windows\\System32\\Wbem;C:\\Windows\\System32\\WindowsPowerShell\\v1.0\\;C:\\Program Files (x86)\\NVIDIA Corporation\\PhysX\\Common;C:\\WINDOWS\\system32;C:\\WINDOWS;C:\\WINDOWS\\System32\\Wbem;C:\\WINDOWS\\System32\\WindowsPowerShell\\v1.0\\;C:\\Users\\yiyan\\AppData\\Local\\Microsoft\\WindowsApps;C:\\WINDOWS\\system32;C:\\WINDOWS;C:\\WINDOWS\\System32\\Wbem;C:\\WINDOWS\\System32\\WindowsPowerShell\\v1.0\\;C:\\WINDOWS\\System32\\OpenSSH\\;C:\\Program Files\\NVIDIA Corporation\\NVIDIA NvDLISR;C:\\Program Files (x86)\\Razer\\ChromaBroadcast\\bin;C:\\Program Files\\Razer\\ChromaBroadcast\\bin;C:\\Program Files (x86)\\Common Files\\Oracle\\Java\\javapath;C:\\Program Files (x86)\\Razer Chroma SDK\\bin;C:\\Program Files\\Razer Chroma SDK\\bin;C:\\ProgramData\\Oracle\\Java\\javapath;C:\\W\n\nThank you for your time!","AnswerCount":3,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":152,"Q_Id":55322506,"Users Score":0,"Answer":"I think the console command being 'py' and not 'python' anymore is post Python 3.8. I had Python 3.7 up until a few days ago and got confused when I updated too.","Q_Score":0,"Tags":"python-3.x,visual-studio-code","A_Id":66522320,"CreationDate":"2019-03-24T09:48:00.000","Title":"First time questions: why is 'py' recognized but 'python' not? Shortcut for running in terminal? 'echo %PATH%' giving huge paths?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"im fairly new to programming in Python and i've been using the terminal to run my code with no problem. Usually by typing python {filename} to run it. \nHowever, recently i got this error:\nImportError: Python is not installed as a framework. The Mac OS X backend will not be able to function correctly if Python is not installed as a framework. See the Python documentation for more information on installing Python as a framework on Mac OS X. Please either reinstall Python as a framework, or try one of the other backends. If you are using (Ana)Conda please install python.app and replace the use of 'python' with 'pythonw'. See 'Working with Matplotlib on OSX' in the Matplotlib FAQ for more information.\nthen i changed the python {filename} to pythonw {filename} and the code worked. Could someone give me some insight into this error and why it worked by just adding w?","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":2189,"Q_Id":55326688,"Users Score":1,"Answer":"pythonw - run python script allowing GUI.  According to the man page for pythonw.","Q_Score":0,"Tags":"python-3.x,macos,terminal","A_Id":55327734,"CreationDate":"2019-03-24T17:46:00.000","Title":"What is the difference between \"python\" and \"pythonw\" in the mac Terminal?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to program a voice assistant using python and the SpeechRecognition library. But when I execute my program, it runs for about 2 secs and then throws the following Error\n[0:02] Decoding of audio.mp3 finished.\nTraceback (most recent call last):\n  File \"\/home\/USERNAME\/PycharmProjects\/jarvis\/venv\/lib\/python3.7\/site-packages\/speech_recognition\/__init__.py\", line 108, in get_pyaudio\n    import pyaudio\nModuleNotFoundError: No module named 'pyaudio'\nI have already spent some hours trying different solutions but none seem to work for me.\nI am on ubuntu if that helps","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":2907,"Q_Id":55340826,"Users Score":0,"Answer":"Try making sure it's installed for Python 3, not 2, and run pip3 install pyaudio if it is on pip.","Q_Score":0,"Tags":"python,pycharm,speech-recognition,pyaudio","A_Id":55341006,"CreationDate":"2019-03-25T15:06:00.000","Title":"speech_recognition can't import pyaudio; ModuleNotFoundError","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to program a voice assistant using python and the SpeechRecognition library. But when I execute my program, it runs for about 2 secs and then throws the following Error\n[0:02] Decoding of audio.mp3 finished.\nTraceback (most recent call last):\n  File \"\/home\/USERNAME\/PycharmProjects\/jarvis\/venv\/lib\/python3.7\/site-packages\/speech_recognition\/__init__.py\", line 108, in get_pyaudio\n    import pyaudio\nModuleNotFoundError: No module named 'pyaudio'\nI have already spent some hours trying different solutions but none seem to work for me.\nI am on ubuntu if that helps","AnswerCount":2,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":2907,"Q_Id":55340826,"Users Score":0,"Answer":"I just figured it out. There was nothing wrong with my installation. It seems to be a bug in the integrated Terminal of pycharm. When I moved into my project dir with my linux shell and executed my script everything worked just fine. I don't know, why it didn't work with the built in terminal.","Q_Score":0,"Tags":"python,pycharm,speech-recognition,pyaudio","A_Id":55363856,"CreationDate":"2019-03-25T15:06:00.000","Title":"speech_recognition can't import pyaudio; ModuleNotFoundError","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am running a Python script on Azure VM. This code is on a continuous while loop and is designed to never stop. If the VM resets or the program randomly stops I have no way to know that. How can I make a logic app that will tell me if the program stops?\nI would like to receive an email notifying me.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":287,"Q_Id":55341130,"Users Score":1,"Answer":"So, what you're asking isn't really the right way to do this.\nYou should develop and deploy your app so that it's enabled\/run by Windows either in a VM as you have now or an Azure App Service.\nMeaning, build and deploy it so it can just restart after a crash rather than worrying about constantly checking it.  Of course, it need to run reliably as well.\nAnd again, Azure Services don't just randomly crash so that's really one of the last edge cases you should be concerned about.","Q_Score":1,"Tags":"python,virtual-machine,azure-logic-apps","A_Id":55341843,"CreationDate":"2019-03-25T15:22:00.000","Title":"Checking if Python code is still running on VM","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to run python test cases through Jenkins, it has the git clone command with ssh key. \nCommand : git clone -v ssh:\/\/user@host:29418\/project folder_to_clone\nGetting the error like :\nWarning: Permanently added '[host]:29418,[100.64.42.4]:29418' (RSA) to the list of known hosts.\nPermission denied (publickey).\nfatal: Could not read from remote repository.\nPlease make sure you have the correct access rights\nand the repository exists.\nBut while running locally everything fine, On Jenkins only getting this issue.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":417,"Q_Id":55351246,"Users Score":0,"Answer":"You need to add create a shh key using ssh-key , add it to both jenkins credentials and the git repository you are trying to fetch the code from.","Q_Score":0,"Tags":"python-3.x,git,jenkins","A_Id":55352738,"CreationDate":"2019-03-26T06:46:00.000","Title":"Jenkins job fails with git \"git clone\" using ssh key","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"On Windows I can run py test.py having Python 3 installed.\nBut on Ubuntu, py is not recognized as command, but python3 is.\nIs there anyway I can make py the same command as python3?","AnswerCount":2,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":126,"Q_Id":55375436,"Users Score":3,"Answer":"You could always add alias py='python3' to your .bashrc file.","Q_Score":1,"Tags":"python,python-3.x","A_Id":55375458,"CreationDate":"2019-03-27T10:52:00.000","Title":"Cannot run py as command","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"On Windows I can run py test.py having Python 3 installed.\nBut on Ubuntu, py is not recognized as command, but python3 is.\nIs there anyway I can make py the same command as python3?","AnswerCount":2,"Available Count":2,"Score":0.0996679946,"is_accepted":false,"ViewCount":126,"Q_Id":55375436,"Users Score":1,"Answer":"To add Up , If the script wants to call the interpreter\n\nMake sure the first line of your file has #!\/usr\/bin\/env python.\nMake it executable - chmod +x .py.\nAnd run it as .\/.py","Q_Score":1,"Tags":"python,python-3.x","A_Id":55375523,"CreationDate":"2019-03-27T10:52:00.000","Title":"Cannot run py as command","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I need to clear the terminal in Pycharm without clicking the trashbin myself. I've tried using the whole os and csl thing but it only makes some weird arrow in the terminal.","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":154,"Q_Id":55375930,"Users Score":0,"Answer":"The os.system command cannot work because it only executes commands in the Console. It won't work in many other places including IDLE's Python Shell, PyCharm, etc.\nIt should work in your Terminal. You can write your code in PyCharm and execute it in a terminal.\nYou can also use multiple \\n, but it is not really what you want.\nAnother idea would be to add a keyboard shortcut.","Q_Score":0,"Tags":"python","A_Id":55376144,"CreationDate":"2019-03-27T11:18:00.000","Title":"How to clear the terminal in Py-charm. (non-manually)","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a python program which prints long outputs. When i try to run that file in vscode, its interactive window isn't enough to view full output. So is there any way to run python file in cmd from VSCODE?","AnswerCount":2,"Available Count":1,"Score":0.3799489623,"is_accepted":false,"ViewCount":6755,"Q_Id":55381169,"Users Score":4,"Answer":"If you are running windows, VSCode uses Powershell as your terminal by default.  If you want to use the command prompt instead, hit ctrl+shift+p, type Shell into the command pallet, select Terminal: Select Default Shell, and change it to Command Prompt.  I am not sure this will fix your problem as I think Powershell should display just as much output as the CMD, but if you want to try switching terminals, that will do it.  Another option is to try to run it natively in CMD or Powershell, rather than using the VSCode integrated terminal.  That might be better if changing terminals doesn't help.","Q_Score":2,"Tags":"python,visual-studio-code","A_Id":55381313,"CreationDate":"2019-03-27T15:39:00.000","Title":"How do i run python file in cmd from vscode","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a DAG that imports data from a source to a server. From there, I am looking to download that file from the server to the Windows network. I would like to keep this part in Airflow for automation purposes. Does anyone know how to do this in Airflow? I am not sure whether to use the os package, the shutil package, or maybe there is a different approach.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":1629,"Q_Id":55385808,"Users Score":0,"Answer":"I think you're saying you're looking for a way to get files from a cloud server to a windows shared drive or onto a computer in the windows network, these are some options I've seen used:\n\nUse a service like google drive, dropbox, box, or s3 to simulate a synced folder on the cloud machine and a machine in the windows network. \nCall a bash command to SCP the files to the windows server or a worker in the network.  This could work in the opposite direction too. \nAdd the files to a git repository and have a worker in the windows network sync the repository to a shared location.  This option is only good in very specific cases. It has the benefit that you can track changes and restore old states (if the data is in CSV or another text format), but it's not great for large files or binary files.\nUse rsync to transfer the files to a worker in the windows network which has the shared location mounted and move the files to the synced dir with python or bash.\nMount the network drive to the server and use python or bash to move the files there.\n\nAll of these should be possible with Airflow by either using python (shutil) or a bash script to transfer the files to the right directory for some other process to pick up or by calling a bash sub-process to perform the direct transfer by SCP or commit the data via git.  You will have to find out what's possible with your firewall and network settings.  Some of these would require coordinating tasks on the windows side (the git option for example would require some kind of cron job or task scheduler to pull the repository to keep the files up to date).","Q_Score":0,"Tags":"python,airflow,samba,smb","A_Id":55387555,"CreationDate":"2019-03-27T20:20:00.000","Title":"Airflow: How to download file from Linux to Windows via smbclient","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"On Linux, need in Python a way to determine if a given network interface is wifi or just ethernet (i.e. cable) based.  Working on a project where knowing the type of interface transport, if you will, is needed.  Given the modern network architecture in Linux, you can't trust that UDEV or something else has not named the interfaces to something odd, so ens* vs. wl* parsing of the interface names can be trusted.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":123,"Q_Id":55390273,"Users Score":0,"Answer":"Try using the pyric.pyw.iswireless() call from the library PyRIC.","Q_Score":0,"Tags":"python,interface,wifi,ethernet","A_Id":58564141,"CreationDate":"2019-03-28T04:39:00.000","Title":"On Linux OS In Python Determine if a given network interface is wifi based or just ethernet based?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Does anyone have any idea about connecting to NexusDB via python? Thanks.","AnswerCount":1,"Available Count":1,"Score":0.3799489623,"is_accepted":false,"ViewCount":299,"Q_Id":55409834,"Users Score":2,"Answer":"NexusDB does not currently have direct support for Python, but are considering it for future feature additions. Right now your best bet would be to connect via ODBC.","Q_Score":0,"Tags":"python,database,python-3.x,nexusdb","A_Id":55440713,"CreationDate":"2019-03-29T02:53:00.000","Title":"How to connect NexusDB in windows via python?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"The problem is I already have the latest python on my Mac, but when I write python3 in terminal, It shows 3.7.2, not the latest i.e. 3.7.3 .\nI Tried Using brew link python3 and that doesn't work.","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":2843,"Q_Id":55413480,"Users Score":1,"Answer":"Try brew upgrade python3 to update python3. If that doesn't work, try to brew update (to update Brew) before running the command","Q_Score":1,"Tags":"python","A_Id":55413550,"CreationDate":"2019-03-29T08:43:00.000","Title":"How Upgrade Python 3.7.2 to Python 3.7.3 via Homebrew","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am running python in a Linux machine.\nI wonder if a write() done on a file object returned from open() can write less than the amount of data given?\nI know this is the behavior in os.write() but I am not sure if that's the case in file.write() as well or not?\nSo shall I keep retrying until all data is written? Or is it safe to assume everything is written in case of success?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":80,"Q_Id":55416290,"Users Score":1,"Answer":"You are correct. open() returns a 'TextIOWrapper'. From its docstring: \"Character and line based layer over a BufferedIOBase object, buffer.\" \nAssuming f = open(\"\/path\/to\/text.txt\", \"w\"), calling f.flush() will ensure all data currently in the buffer is flushed\/written to \"\/path\/to\/text.txt\".\nIf line buffering is active (f.line_buffering == True), writes ending with a line break are flushed automatically.","Q_Score":1,"Tags":"python-3.x","A_Id":55417399,"CreationDate":"2019-03-29T11:18:00.000","Title":"Can Python file write in Linux do partial writes?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I just started studying flask and built a toy website to see how well I am doing. I have a flask website built in python 3.6 and I have tested it on my windows computer and everything goes very well. Now I want to host the website on an ubuntu ec2 instance. But first, I am testing if everything runs well on my ec2 instance and am stuck at trying to access port 5000 on my ec2 instance My app is currently serving on port 127.0.0.1:5000 of my linux server. I have tried to connect to my.ec2.public.ip:5000 and my.ec2.private.ip:5000 with no success. Could someone help me? Thanks.","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":287,"Q_Id":55426401,"Users Score":0,"Answer":"By default a new AWS instance would not allow port 5000 to be accessed, so you will need to modify the security group to allow access on that port. You do this thru the AWS console.","Q_Score":0,"Tags":"amazon-ec2,python-3.6,flask-sqlalchemy,ubuntu-18.04","A_Id":55426431,"CreationDate":"2019-03-29T22:51:00.000","Title":"How do I access 127:.0.0.1:5000 on Ubuntu Server 16.04 LTS (HVM), SSD Volume Type","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I was trying to install python 3 because I wanted to work on a project using python 3. Instructions I'd found were not working, so I boldly ran brew install python. Wrong move. Now when I run python -V I get \"Python 3.7.3\", and when I try to enter a virtualenv I get -bash: \/Users\/elliot\/Library\/Python\/2.7\/bin\/virtualenv: \/usr\/local\/opt\/python\/bin\/python2.7: bad interpreter: No such file or directory\nMy ~\/.bash_profile reads \nexport PATH=\"\/Users\/elliot\/Library\/Python\/2.7\/bin:\/usr\/local\/opt\/python\/libexec\/bin:\/Library\/PostgreSQL\/10\/bin:$PATH\" \nbut ls \/usr\/local\/Cellar\/python\/ gets me 3.7.3 so it seems like brew doesn't even know about my old 2.7 version anymore.\nI think what I want is to reset my system python to 2.7, and then add python 3 as a separate python running on my system. I've been googling, but haven't found any advice on how to specifically use brew to do this.\nEdit: I'd also be happy with keeping Python 3.7, if I knew how to make virtualenv work again. I remember hearing that upgrading your system python breaks everything, but I'd be super happy to know if that's outdated knowledge and I'm just being a luddite hanging on to 2.7.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":220,"Q_Id":55437402,"Users Score":0,"Answer":"So, I got through it by completely uninstalling Python, which I'd been reluctant to do, and then reinstalled Python 2. I had to update my path and open a new shell to get it to see the new python 2 installation, and things fell into place. I'm now using pyenv for my Python 3 project, and it's a dream.","Q_Score":1,"Tags":"python,python-3.x,python-2.7,homebrew","A_Id":55445585,"CreationDate":"2019-03-31T02:36:00.000","Title":"Accidentally used homebrew to change my default python to 3.7, how do I change it back to 2.7?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Every time I run pyinstaller in the terminal I get the following error:\nPermissionError: [Errno 1] Operation not permitted: '\/Users\/my_username\/dist\/\nAny ideas on solution?","AnswerCount":3,"Available Count":3,"Score":0.0,"is_accepted":false,"ViewCount":1964,"Q_Id":55437879,"Users Score":0,"Answer":"I had success by changing the properties of the directory where DIST and BUILD folders are created.\nLocate and select the directory in Finder and open its porperties window (CMD + I)\nOpen up the Sharing and permission panel by clicking on the down arrow\nClick on the padlock and enter your computer password to make changes\nClick on Everyone and then select Read and Write from the dropdown\nClick on the small cog and select Apply to enclosed items\nDelete the DIST and BUILD folders and try again","Q_Score":2,"Tags":"python-3.x,pyinstaller","A_Id":62834420,"CreationDate":"2019-03-31T04:31:00.000","Title":"Pyinstaller PermissionError: [Errno 1] Operation not permitted: '\/Users\/user_name\/dist\/","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Every time I run pyinstaller in the terminal I get the following error:\nPermissionError: [Errno 1] Operation not permitted: '\/Users\/my_username\/dist\/\nAny ideas on solution?","AnswerCount":3,"Available Count":3,"Score":0.0,"is_accepted":false,"ViewCount":1964,"Q_Id":55437879,"Users Score":0,"Answer":"pyinstaller is probably trying to write files to a directory \/Users\/my_username\/dist where you don't have write access.\nYou can either retry with superuser permissions (i.e. sudo) or try something like brew instead.","Q_Score":2,"Tags":"python-3.x,pyinstaller","A_Id":55439475,"CreationDate":"2019-03-31T04:31:00.000","Title":"Pyinstaller PermissionError: [Errno 1] Operation not permitted: '\/Users\/user_name\/dist\/","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Every time I run pyinstaller in the terminal I get the following error:\nPermissionError: [Errno 1] Operation not permitted: '\/Users\/my_username\/dist\/\nAny ideas on solution?","AnswerCount":3,"Available Count":3,"Score":0.1973753202,"is_accepted":false,"ViewCount":1964,"Q_Id":55437879,"Users Score":3,"Answer":"I was able to get around this by manually deleting all files in the target directory before running Pyinstaller again. Give it a try.","Q_Score":2,"Tags":"python-3.x,pyinstaller","A_Id":61252415,"CreationDate":"2019-03-31T04:31:00.000","Title":"Pyinstaller PermissionError: [Errno 1] Operation not permitted: '\/Users\/user_name\/dist\/","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a text file like this:\n\n...\n  NAME : name-1\n  ...\n  NAME : name-2\n  ...\n  ...\n  ...\n  NAME : name-n\n  ...\n\nI want output text files like this:\n\nname_1.txt : NAME : name-1 ...\n  name_2.txt : NAME : name-2 ...\n  ...\n  name_n.txt : NAME : name-n ...\n\nI have the basic knowledge of grep, sed, awk, shell scripting, python.","AnswerCount":3,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":87,"Q_Id":55459973,"Users Score":0,"Answer":"With GNU sed:\nsed \"s\/\\(.*\\)\\(name-.*\\)\/echo '\\1 \\2' > \\2.txt\/;s\/-\/_\/2e\" input-file\n\nTurn line NAME : name-2 into echo \"NAME : name-2\" > name-2.txt\nThen replace the second - with _ yielding echo \"NAME : name-2\" > name_2.txt\ne have the shell run the command constructed in the pattern buffer.\n\nThis outputs blank lines to stdout, but creates a file for each matching line.\nThis depends on the file having nothing but lines matching this format... but you can expand the gist here to skip other lines with n.","Q_Score":0,"Tags":"python,awk,sed,grep","A_Id":55462346,"CreationDate":"2019-04-01T16:47:00.000","Title":"how to find text before and after given words and output into different text files?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm on Windows and want to use the Python package apt_pkg in PyCharm.\nOn Linux I get the package by doing sudo apt-get install python3-apt but how to install apt_pkg on Windows?\nThere is no such package on PyPI.","AnswerCount":2,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":1074,"Q_Id":55474845,"Users Score":1,"Answer":"There is no way to run apt-get in Windows; the package format and the supporting infrastructure is very explicitly Debian-specific.","Q_Score":1,"Tags":"python,pycharm,apt","A_Id":55474963,"CreationDate":"2019-04-02T12:30:00.000","Title":"How to install Python packages from python3-apt in PyCharm on Windows?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm working on a twisted web application which uploads files and encrypts them, returning the url+key to the user.\nI've been tasked with scaling this application. At the moment when there are more than 3-4 concurrent upload requests the performance will drop off significantly.\nI'm no Twisted expert but I assume this is due to it running in a single python process, being a high cpu application and the GIL?\nHow could I go about scaling this?\nIf this was a different framework such as Flask I would just put uwsgi in front of it and scale the number of processes. Would something similar work for Twisted and if so what tools are generally used for this?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":259,"Q_Id":55483727,"Users Score":0,"Answer":"If you think you could throw uwsgi in front of the application, I suppose it is pretty close to shared-nothing.  So you can run multiple instances of the program and gain a core's worth of performance from each.\nThere are a couple really obvious options for exactly how to run the multiple instances.  You could have a load balancer in front.  You could have the processes share a listening port.  There are probably more possibilities, too.\nSince your protocol seems to be HTTP, any old HTTP load balancer should be applicable.  It needn't be Twisted or Python based itself (though certainly it could be).\nIf you'd rather share a listening port, Twisted has APIs for passing file descriptors between processes (IReactorSocket) and for launching new processes that inherit a file descriptor from the parent (IReactorProcess).","Q_Score":1,"Tags":"python,twisted,scaling","A_Id":55485152,"CreationDate":"2019-04-02T21:19:00.000","Title":"How to scale a CPU bound Twisted application?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I have a .bash_profile file ready to go. When I activate my virtual environment I can't access it. The environment bash_profile is blank. Is there a way to 'import' my normal bash_profile into all\/select virtual environments\nI'm creating the virtual environments through the anaconda distribution, which messes with the path for the .bash_profile a bit, I believe.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":363,"Q_Id":55484799,"Users Score":0,"Answer":"Turns out I just had to source the 'home' bash_profile with source ~\/.bash_profile from within the environment.","Q_Score":1,"Tags":"python,bash,shell,anaconda","A_Id":55484973,"CreationDate":"2019-04-02T23:15:00.000","Title":"How to access main .bash_profile from within an anaconda virtual environment?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am using ubuntu 16 version and running Odoo erp system 12.0 version.\nOn my application log file i see information says \"virtual real time limit (178\/120s) reached\".\nWhat exactly it means & what damage it can cause to my application?\nAlso how i can increase the virtual real time limit?","AnswerCount":2,"Available Count":1,"Score":0.4621171573,"is_accepted":false,"ViewCount":10514,"Q_Id":55510726,"Users Score":5,"Answer":"Open your config file and just add below parameter :\n--limit-time-real=100000","Q_Score":9,"Tags":"python,ubuntu,odoo","A_Id":59282499,"CreationDate":"2019-04-04T07:59:00.000","Title":"virtual real time limit (178\/120s) reached","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"In a machine-oriented deployment, usually, people would use gunicorn to spin up a number of workers to serve incoming requests. (yes, the worker_class would further define the behavior within the worker process)\nWhen deploying in a Kubernetes cluster, do we still gunicorn (or to be exact, do we still need multiprocess deployment)?\nBasically, each running container is a process (in the one-container-per-pod config). Multiple pods running behind a service is already equivalent to what gunicorn has to offer. In other words, rely on Kubernetes service instead of gunicorn\nIs gunicorn still needed?\nYes, a pod is not exactly the same as a process (some overhead in each pod for the companion container), but other than that, anything else we may miss from not having gunicorn?\nEdited\nClarification: yes, still need gunicorn or other wsgi http server to run the python app. My question is really about the multiprocess aspect (as the multiprocess\/gunicor in the title).","AnswerCount":4,"Available Count":2,"Score":0.049958375,"is_accepted":false,"ViewCount":6076,"Q_Id":55524904,"Users Score":1,"Answer":"It really depends on your use-cases. There is no right on wrong here if one solution suits you better than the other.\nWe have a similar use-case.\nWe are running about 30 replica's of the same service. Each pod runs 1 container, which again runs 50 duplicate services.\nWe could have ended up with 1500 pods running one service, but we've tested that the performance vs. required resources was much better when running only 30 replicas, which runs 50 services per replica.\nThe only thing we are doing extra is monitoring those 50 services per pod, so if one of them stops, it's being restarted. If all of them have some error, we run a healthcheck on the pod, and the pod is recreated.","Q_Score":17,"Tags":"kubernetes,multiprocessing,gunicorn,python-multiprocessing","A_Id":67640118,"CreationDate":"2019-04-04T21:06:00.000","Title":"In Kubernetes, do we still need multiprocess\/gunicorn?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"In a machine-oriented deployment, usually, people would use gunicorn to spin up a number of workers to serve incoming requests. (yes, the worker_class would further define the behavior within the worker process)\nWhen deploying in a Kubernetes cluster, do we still gunicorn (or to be exact, do we still need multiprocess deployment)?\nBasically, each running container is a process (in the one-container-per-pod config). Multiple pods running behind a service is already equivalent to what gunicorn has to offer. In other words, rely on Kubernetes service instead of gunicorn\nIs gunicorn still needed?\nYes, a pod is not exactly the same as a process (some overhead in each pod for the companion container), but other than that, anything else we may miss from not having gunicorn?\nEdited\nClarification: yes, still need gunicorn or other wsgi http server to run the python app. My question is really about the multiprocess aspect (as the multiprocess\/gunicor in the title).","AnswerCount":4,"Available Count":2,"Score":0.2449186624,"is_accepted":false,"ViewCount":6076,"Q_Id":55524904,"Users Score":5,"Answer":"Gunicorn is used to serve WSGI(Web Server Gateway Interface) applications so it is a server and not just multiprocess orchestration tool. Kubernetes on the hand is an orchestration tool that helps manage the infrastucture. It does not speak HTTP nor does it know anything about WSGI specs. \nIn other words, you can't run WSGI applications on bare kubernetes pods, you will still need a WSGI server liike Gunicorn, uWSGI, etc to serve the application.","Q_Score":17,"Tags":"kubernetes,multiprocessing,gunicorn,python-multiprocessing","A_Id":55525082,"CreationDate":"2019-04-04T21:06:00.000","Title":"In Kubernetes, do we still need multiprocess\/gunicorn?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I use a python script (docker container) to write to Redis db (docker container). The script main objective is to write to Redis db. But there are also other scripts that write to the same Redis db. So where should i make the connection to redis db inside a function in script or globally ?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":32,"Q_Id":55528464,"Users Score":0,"Answer":"If your python project is long running (e.g. a web app or a daemon script that runs forever) and making repeated calls, open a single connection and reuse it.\nIf your python code is short lived script (e.g. it runs for a few seconds then exits) then it doesn't matter so much. Even then, if it's making multiple reads\/writes it's better to open one connection and reuse it in the script.\nBy the wording of your question, it sounds as though you might be thinking of opening the connection outside the script? I'm not really sure where you're going with that, so I can't answer there.","Q_Score":0,"Tags":"python,redis","A_Id":55528560,"CreationDate":"2019-04-05T04:55:00.000","Title":"Is it a good practice to open connection to Redis database inside the function that writes to it or outside globally?","Data Science and Machine Learning":0,"Database and SQL":1,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm having trouble updating python on Git Bash\nwhen I run python --version on git bash it still shows me 2.7 The thing is that when I run python --version in the anaconda prompt it shows me the updated version 3.7.3\nHow can I make it so that when I run python --version on Git Bash it will show me the latest version \nThanks!","AnswerCount":1,"Available Count":1,"Score":0.3799489623,"is_accepted":false,"ViewCount":2602,"Q_Id":55539344,"Users Score":2,"Answer":"You can't, or rather you really shouldn't. Linux subsystems expect python to resolve to Python2, and since Git Bash is (very shallowly) emulating a Linux machine under the hood of its bash shell, it would be a Very Bad Idea to change that expectation.\nHowever, python3 should launch your Python 3 interpreter.","Q_Score":1,"Tags":"python,anaconda,conda,git-bash,python-3.7","A_Id":55539411,"CreationDate":"2019-04-05T15:58:00.000","Title":"How can I update python on Git Bash?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Setting up to start python for data analytics and want to install python 3.6 in Ubuntu 18.0 . Shall i run both version in parallel or overwrite 2.7 and how ? I am getting ambiguous methods when searched up.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":67,"Q_Id":55552885,"Users Score":0,"Answer":"Try pyenv and\/or pipenv . Both are excellent tools to maintain local python installations.","Q_Score":0,"Tags":"python-3.x,python-2.7","A_Id":55552911,"CreationDate":"2019-04-06T19:50:00.000","Title":"How to install python3.6 in parallel with python 2.7 in Ubuntu 18","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to build python 64 bit from source on solaris10.\nAfter searching in net for a while. I tried using CFLAGS=-m64 LDFLAGS=-m64 while executing .\/configure.But getting errors like wrong ELFCLASS32\nTried the below \n.\/configure  CFLAGS=-m64 LDFLAGS=-m64\nBut no luck. And make is throwing errror like  \"make: Fatal error: Command failed for target `libinstall'\"\nI am suspecting this is regarding gcc\nTIA","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":210,"Q_Id":55557223,"Users Score":1,"Answer":"The problem is you are linking your 64-bit program with 32-bit libraries. That is what the WRONGELFCLASS error is all about.\nUnfortunately, the default on Solaris tends to be to generate 32-bit libraries. Make sure you generate 64-bit libraries with -m64 and use the file command on the generated .o files to verify they are 64-bit libraries.  The 64-bit libraries are in subdirectory 64\/ for each library directory (such as \/usr\/lib\/64\/).","Q_Score":1,"Tags":"python,gcc,x86-64","A_Id":55858182,"CreationDate":"2019-04-07T08:53:00.000","Title":"How to build 64 bit python from source on solaris","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I want to backup a remote directory with a lot of files, and because of that, I need to compress it before downloading it. I can access this folder through SSH or FTP. The host is running on Linux.\nI have covered the downloading part with aioftp. I was using paramiko and tar Linux command for compressing the directory in the remote host, but instead, I want to use Python modules (from standard library or not) and avoid using Linux commands. Maybe a combination of paramiko to open the session, urllib to create the remote object and tarfile to compress it can make the job, but I haven't found the way.\nIn the end, I want a directory-backup.tar.gz in my localhost.\nHow can I accomplish that?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":565,"Q_Id":55564316,"Users Score":1,"Answer":"You have to compress the directory using tools on the server. \nUsing local Python code makes no sense. To compress the files locally, you would have to download the uncompressed files, compress them (with your local Python code), and upload the compressed archive, only to download it then again. That defies the purpose of the compression, right?\nIf you want to use Python code for compression, you would have to run the Python code on the server. Either by uploading the script and executing it on the server or by feeding the code to remote python process. I do not see much advantage of doing that over using ready-made tar command.","Q_Score":1,"Tags":"python,ssh,urllib,paramiko,tarfile","A_Id":55567385,"CreationDate":"2019-04-07T22:42:00.000","Title":"Pythonic way to compress a remote directory using SSH or FTP","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm trying to build a .exe on Windows from my Python 3.7 application using PyInstaller. The build appears to run smoothly and shows no errors; however, executing the file on the Windows command prompt results in this awful error:\n\nOSError: PortAudio library not found \n\nI've done some research about this problem and found some info, but still couldn't overcome it. My app uses the sounddevice library, which depends on PortAudio library. PortAudio is installed, since the app works perfectly when I run it directly using Python; the problem is, clearly, that PyInstaller tracks the dependencies in some different way and is not able to find it and link it to the build.\nThis 'different way' is, actually, calling the 'find_library' function from 'ctypes.util' Python library to find the PortAudio library on the system. So, I ran the following on Python and confirmed it is not able to find the libary.\n\nPython 3.7.1 (default, Dec 10 2018, 22:54:23) [MSC v.1915 64 bit (AMD64)] :: > Anaconda, Inc. on win32\n  Type \"help\", \"copyright\", \"credits\" or \"license\" for more information.\n\nfrom ctypes.util import find_library\na = find_library('portaudio')\nprint(a)\nNone\n\n\nSo far, I've tried several solutions. First, I downloaded and compiled the last PortAudio version manually. Didn't work. Then, I tried using Anaconda instead of the official Python distribution; as you may know, Anaconda's package manager 'conda' can deal with C libraries like PortAudio. So I installed it on my Anaconda's virtual environment and tried to build my app in there. Didn't work either. I also tried adding PortAudio directory to Windows PATH variable, but it also failed. I'm kinda lost. The only idea I have yet to try is building it on Linux using Wine, but I suspect there might be a way to get it working on Windows. \nAny ideas?","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":877,"Q_Id":55566430,"Users Score":0,"Answer":"As the selected answer didn't work for me, because I'm using virtualenv, I put my working solution here.\nFor me, the working solution is to add _sounddevice_data folder where the .exe file is located then making a portaudio-binaries folder in it and finally putting libportaudio64bit.dll in the recently created folder.\nHope it helps!","Q_Score":4,"Tags":"python-3.x,windows,pyinstaller,portaudio","A_Id":57434105,"CreationDate":"2019-04-08T04:50:00.000","Title":"PyInstaller executable on Windows not working because of PortAudio library issues (OSError)","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have written several small scripts in python and build the binaries using pyinstaller. \nWhen I would build them on my Ubuntu 16.04 machine -- they would run fine on the machine where I build them. But moving the file to a Centos \/ Redhat 7.4 machine would give me GCLIB and other .so version dependency errors.\n\nBuilding the same binary on docker with the same version of Centos would not give these errors.\nIf I try running the binary compiled on Centos 7.4 on Centos 6.6 I would get errors again -- But building on Centos 6.6 it would work correctly with Centos 6.6\n\nI have solved the problem using a lower version of Centos to build my binaries for now. \n\nMy specific question is -- In Python, is it a common approach of building the binaries on different OSs based on the target OS that it is intended for (assuming linux targets only) or what I am doing is a hack \/ bad way of solving this problem? \n\nI am trying to understand how this problem is approached in the standard way.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":1266,"Q_Id":55585021,"Users Score":3,"Answer":"As long as the binary produced by pyinstaller only depends on glibc, then it should be a valid approach to build it on the oldest system available, and it should work on future systems.\nIn general, glibc is designed to be backwards compatible, so that applications built against an older version of glibc will still run with a newer glibc, but not vice versa. It does this via symbol versioning, in which each symbol you link to can have a version associated with it, and any case in which a newer glibc has changed the ABI of some function, it will also have a compatibility routine with the old ABI exposed with the older symbol version, so that applications linked against the old one will dynamically link with the compatibility routine, while if you have an application linked against the newer symbol versions, there won't be the newer versions in an older glibc to dynamically link to.\nWhile other libraries can also do this, not many library authors bother to, so newer versions may simply be incompatible, while the glibc developers generally try to preserve compatibility.\nSo yes, as long as the final binary links only to glibc, or to other libraries which follow a similar symbol versioning scheme to ensure that older binaries will still link properly to newer versions of the library, it is perfectly valid to build against an older version and then run it on newer versions of various Linux distros, and even generally across distros as well.\nUnfortunately, there's no good way to get the linker to pick the older symbol versions if linking against a newer glibc, so frequently the easiest way to do this is within a Docker or other type of container containing an older distro that has the oldest glibc that you want to be compatible with.","Q_Score":1,"Tags":"python,linux,pyinstaller,software-distribution","A_Id":55585125,"CreationDate":"2019-04-09T04:10:00.000","Title":"Does python + pyinstaller support multiple OS\/Versions of linux?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I tried all combinations and nothing made import geohash work:\n\npip install geohash\npip3 install geohash\napt-get install python-dev\npip3 install python-geohash\n\nthe 4th one isn't even installing but threw an error on me saying:\nsrc\/geohash.cpp:538:20: fatal error: Python.h: No such file or directory\n   #include \n                      ^\n  compilation terminated.\n  error: command 'x86_64-linux-gnu-gcc' failed with exit status 1","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":1378,"Q_Id":55596971,"Users Score":1,"Answer":"Thanks @William D. Irons. The issue got fixed when I did sudo apt-get install libpython3.7-dev","Q_Score":0,"Tags":"python-3.x,geohashing","A_Id":55605164,"CreationDate":"2019-04-09T16:05:00.000","Title":"error: command 'x86_64-linux-gnu-gcc' failed with exit status 1 while doing pip3 install python-geohash","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Some background: I have set up Airflow on Kubernetes (on AWS). I am able to run DAGs that query a database, send emails or do anything that doesn't require a package that isn't already a part of Airflow. For example, if I try to run a DAG that uses the Facebook-business SDK the DAG will obviously break because the dependency isn't available. I've tried a couple different ways of trying to get this dependency, along with others, installed but haven't been successful. \nI have tried to install python packages by modifying my scheduler and webserver deployments to do a pip install of my dependencies as part of an initContainer. When I do this, the DAG remains broken as it is unable to find the needed packages. When I open a shell to my pod I can see that the dependencies have not been installed (I check using pip list). I have also verified that there aren't other python\/pip versions installed. \nI have also tried to install the dependencies by running a pip install when I open a shell to my pod. This way is successful in installing the dependency in the correct place and also makes it available. However, instead of the webserver UI showing that my DAG is broken, I get the this dag isn't available in the webserver dagbag object message. \nI would expect that running pip install as part of my initContainer or container would makes these dependencies available in my pod. However, this isn't the case. It's as if pip install runs without any issues, but by the time my pods are fully set up the python packages are nowhere to be found\nI forgot to say that I have found a way to make it work, but it feels somewhat hacky and like there should be a better way\n- If I open a shell to my webserver container and install the needed dependencies and then open a shell to my scheduler and do the same thing, the dependencies are found and the DAG works.","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":4095,"Q_Id":55623219,"Users Score":1,"Answer":"The init container is a separate docker instance.  Unless you rig up some sort of shared storage for your python libraries (which is quite dubious) any pip installs in the init container won't impact the running container of the pod.  \nI see two options:\n1) Modify the docker image that you're using to include the packages you need\n2) Prepend a pip install to the command being run in the pod.  It's not uncommon to string together a few commands with && between them, in order to execute a sequence of operations in a starting pod.","Q_Score":4,"Tags":"python,kubernetes,pip,airflow","A_Id":55624133,"CreationDate":"2019-04-11T00:57:00.000","Title":"Is there a specific way to install python packages on pods?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am using a word embeddings model (FastText via Gensim library) to expand the terms of a search. \nSo, basically if the user write \"operating system\" my goal is to expand that term with very similar terms like \"os\", \"windows\", \"ubuntu\", \"software\" and so on.\nThe model works very well but now the time has come to improve the model with \"external information\", with \"external information\" i mean OOV (out-of-vocabulary) terms OR terms that do not have good context.\nFollowing the example i wrote above when the user writes operating system i would like to expand the query with the \"general\" terms:\nTerms built in the FastText model:\n\nwindows \nubuntu\nsoftware\n\nAND \nterms that represent (organizations\/companies) like \"Microsoft\", \"Apple\" so the complete query will be:\n\nterm: operating system\nquery: operating system, os, software, windows, ios, Microsoft, Apple\n\nMy problem is that i DO NOT have companies inside the corpus OR, if present, i do not have to much context to \"link\" Microsoft to \"operating system\".\nFor example if i extract a piece inside the corpus i can read \"... i have started working at Microsoft in November 2000 with my friend John ...\" so, as you can see, i cannot contextualize \"Microsoft\" word because i do not have good context, indeed.\nA small recap:\n\nI have a corpus where the companies (terms) have poor context\nI have a big database with companies and the description of what they do.\n\nWhat i need to do:\nI would like to include the companies in my FastText model and set \"manually\" their words context\/cloud of related terms.\nIdeas?","AnswerCount":2,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":754,"Q_Id":55629368,"Users Score":1,"Answer":"These kinds of models need numerous, varied usage examples to place a token in a relatively good place, at meaningful distances\/directions from other related tokens. If you don't have such examples, or your examples are few\/poor, there's little way the algorithm can help. \nIf you somehow know, a priori, that 'microsoft' should appear in some particular vector coordinates, then sure, you could patch the model to include that word->vector mapping. (Though, such model classes often don't include convenient methods for such incremental additions, because it's expected words are trained in bulk from corpuses, not dictated individually.)\nBut if you don't have example text for some range of tokens, like company names, you probably don't have independent ideas of where those tokens should be, either. \nReally, you need to find adequate training data. And then, assuming you want the vectors for these new terms to be in the \"same space\" and comparable to your existing word-vectors, combine that with your prior data, and training all the data together into one combined model. (And further, for an algorithm like FastText to synthesize reasonable guess-vectors for never-before-seen OOV words, it needs lots of examples of words which have overlapping meanings and overlapping character-n-gram fragments.)\nExpanding your corpus to have better training data for, say, 100 target organization names might be as simple as scraping sentences\/paragraphs including those names from available sources, like Wikipedia or the web. \nBy gathering dozens (or even better hundreds or thousands) of independent examples of the organization names in real language contexts, and because those contexts include many mutually-shared other words, or names of yet other related organizations, you'd be able induce reasonable vectors for those terms, and related terms.","Q_Score":1,"Tags":"python,machine-learning,nlp,gensim","A_Id":55634269,"CreationDate":"2019-04-11T09:40:00.000","Title":"How to add OOV terms in a word embeddings model","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am using Apache Beam to read data from Google Cloud Datastore with the help of Beam's own io.gcp.datastore.v1.datastoreio Python APIs.\nI run my pipeline on Google Cloud Dataflow.\nI want to ensure that my workers are not overloaded with data.\nHow can I read data in batches or ensure using some other mechanism that my workers are not pulling a huge amount of data in one go?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":128,"Q_Id":55638369,"Users Score":0,"Answer":"Dataflow automatically does this for you. By default, datastoreio breaks your files into 64MB chucks. If you want to break them up into smaller pieces, use the num_splits parameter on the initializer to specify how many pieces to break each file into.","Q_Score":0,"Tags":"python,google-cloud-datastore,google-cloud-dataflow,apache-beam","A_Id":55717280,"CreationDate":"2019-04-11T17:42:00.000","Title":"Read records in batches from Google Cloud Datastore using Apache Beam","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"So I'm following a book that's teaching me how to make a Learning Log using Python and the Django web framework. I was asked to go to a terminal and create a directory called \"learning_log\" and change the working directory to \"learning_log\" (did that with no problems). However, when I try to create the virtual environment, I get an error (seen at the bottom of this post). Why am I getting this error and how can I fix this to move forward in the book?\nI already tried installing a virtualenv with pip and pip3 (as the book prescribed). I was then instructed to enter the command: \nlearning_log$ virtualenv ll_env\nAnd I get: \nbash: virtualenv: command not found\nSince I'm using Python3.6, I tried: \nlearning_log$ virtualenv ll_env --python=python3\nAnd I still get:\nbash: virtualenv: command not found\nBrandons-MacBook-Pro:learning_log brandondusch$ python -m venv ll_env\nError: Command '['\/Users\/brandondusch\/learning_log\/ll_env\/bin\/python', '-Im', 'ensurepip', '--upgrade', '-\n-default-pip']' returned non-zero exit status 1.","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":538,"Q_Id":55659897,"Users Score":0,"Answer":"I had the same error. I restarted my computer and tried it again, but the error was still there. Then I tried python3 -m venv ll_env and it moved forward.","Q_Score":0,"Tags":"macos,terminal,virtualenv,python-3.6,python-venv","A_Id":60223146,"CreationDate":"2019-04-12T21:52:00.000","Title":"Why do I keep getting this error when trying to create a virtual environment with Python 3 on MacOS?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":1},{"Question":"So I'm following a book that's teaching me how to make a Learning Log using Python and the Django web framework. I was asked to go to a terminal and create a directory called \"learning_log\" and change the working directory to \"learning_log\" (did that with no problems). However, when I try to create the virtual environment, I get an error (seen at the bottom of this post). Why am I getting this error and how can I fix this to move forward in the book?\nI already tried installing a virtualenv with pip and pip3 (as the book prescribed). I was then instructed to enter the command: \nlearning_log$ virtualenv ll_env\nAnd I get: \nbash: virtualenv: command not found\nSince I'm using Python3.6, I tried: \nlearning_log$ virtualenv ll_env --python=python3\nAnd I still get:\nbash: virtualenv: command not found\nBrandons-MacBook-Pro:learning_log brandondusch$ python -m venv ll_env\nError: Command '['\/Users\/brandondusch\/learning_log\/ll_env\/bin\/python', '-Im', 'ensurepip', '--upgrade', '-\n-default-pip']' returned non-zero exit status 1.","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":538,"Q_Id":55659897,"Users Score":0,"Answer":"For Ubuntu:\nThe simple is if virtualenv --version returns something like virtualenv: command not found and which virtualenv prints nothing on the console, then virtualenv is not installed on your system. Please try to install using pip3 install virtualenv  or sudo apt-get install virtualenv but this one might install a bit older one.\nEDIT\nFor Mac:\nFor Mac, you need to install that using sudo pip install virtualenv after you have installed Python3 on your Mac.","Q_Score":0,"Tags":"macos,terminal,virtualenv,python-3.6,python-venv","A_Id":55660257,"CreationDate":"2019-04-12T21:52:00.000","Title":"Why do I keep getting this error when trying to create a virtual environment with Python 3 on MacOS?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":1},{"Question":"I'm migrating a python application from an ubuntu server with locale en_US.UTF-8 to a new debian server which comes with C.UTF-8 already set by default. I'm trying to understand if there would be any impact but couldn't find good resources on the internet to understand the difference between both.","AnswerCount":4,"Available Count":3,"Score":0.0,"is_accepted":false,"ViewCount":44376,"Q_Id":55673886,"Users Score":0,"Answer":"I can confirm there is effect on different locales (C.UTF8 vs en_US.UTF8). I recently deployed one python program into a new  server, and it performed differently. The old and new servers are both Ubuntu 18 servers, and the only difference is the locale (C.UTF8 vs en_US.UTF8).  After setting the locale in new server as C.UTF8, they behave the same now.\nIt is easy to set the locale for a single application in Linux environment. You just need to add export LANG=C.UTF8; before your application. Assume you execute you application as python myprogram.py, then you type:\nexport LANG=C.UTF8; python myprogram.py","Q_Score":45,"Tags":"python,linux,docker,debian,locale","A_Id":68593911,"CreationDate":"2019-04-14T09:42:00.000","Title":"What is the difference between C.UTF-8 and en_US.UTF-8 locales?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm migrating a python application from an ubuntu server with locale en_US.UTF-8 to a new debian server which comes with C.UTF-8 already set by default. I'm trying to understand if there would be any impact but couldn't find good resources on the internet to understand the difference between both.","AnswerCount":4,"Available Count":3,"Score":1.2,"is_accepted":true,"ViewCount":44376,"Q_Id":55673886,"Users Score":42,"Answer":"In general C is for computer, en_US is for people in US who speak English (and other people who want the same behaviour).\nThe for computer means that the strings are sometime more standardized (but still in English), so an output of a program could be read from an other program. With en_US, strings could be improved, alphabetic order could be improved (maybe by new rules of Chicago rules of style, etc.). So more user-friendly, but possibly less stable. Note: locales are not just for translation of strings, but also for collation (alphabetic order, numbers (e.g. thousand separator), currency (I think it is safe to predict that $ and 2 decimal digits will remain), months, day of weeks, etc.\nIn your case, it is just the UTF-8 version of both locales.\nIn general it should not matter. I usually prefer en_US.UTF-8, but usually it doesn't matter, and in your case (server app), it should only change log and error messages (if you use locale.setlocale().  You should handle client locales inside your app. Programs that read from other programs should set C before opening the pipe, so it should not really matter.\nAs you see, probably it doesn't matter.  You may also use POSIX locale, also define in Debian. You get the list of installed locales with locale -a.\nNote: Micro-optimization will prescribe C\/C.UTF-8 locale: no translation of files (gettext), and simple rules on collation and number formatting, but this should visible only on server side.","Q_Score":45,"Tags":"python,linux,docker,debian,locale","A_Id":55693338,"CreationDate":"2019-04-14T09:42:00.000","Title":"What is the difference between C.UTF-8 and en_US.UTF-8 locales?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm migrating a python application from an ubuntu server with locale en_US.UTF-8 to a new debian server which comes with C.UTF-8 already set by default. I'm trying to understand if there would be any impact but couldn't find good resources on the internet to understand the difference between both.","AnswerCount":4,"Available Count":3,"Score":1.0,"is_accepted":false,"ViewCount":44376,"Q_Id":55673886,"Users Score":7,"Answer":"There might be some impact as they differ in sorting orders, upper-lower case relationships, collation orders, thousands separators, default currency symbol and more.\nC.utf8 = POSIX standards-compliant default locale. Only strict ASCII characters are valid, extended to allow the basic use of UTF-8\nen_US.utf8 = American English UTF-8 locale. \nThough I'm not sure about the specific effect you might encounter, but I believe you can set the locale and encoding inside your application if needed.","Q_Score":45,"Tags":"python,linux,docker,debian,locale","A_Id":55676870,"CreationDate":"2019-04-14T09:42:00.000","Title":"What is the difference between C.UTF-8 and en_US.UTF-8 locales?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am new to programming. I think I'm close to solving my issue, but it finally broke my brain and I need help. \nI am running a pygame script as a scheduled task in crontabs. I have one code that executes successfully and does what it should. I have another code that executes, but when it does the screen goes blank, usually displaying some lines that I usually see when the Linux boots up, and it just stays stuck there.\nI have gone through both codes and absolutely everything is similar and correct. I have #!\/usr\/bin\/env python at the start of each script.\n(Elsewhere it was recommended that I give the exact version, because I use dictionaries in my script and apparently crontab could get confused with the dictionary stuff that pygame uses. I don't fully understand, I tried it but it didn't work on my raspberry pi so I don't think that's the solution.)\nEach script runs fine in the terminal.\nI have set the PATH variable to the one that the python script uses and also set the SHELL to \/bin\/bash. In the task I also have \"export DISPLAY=:0\" (e.g. 12 21 * * * export DISPLAY=:0 && ...). I have found this was the magic trick that got the other code to work. Which made me wonder if there is another environment variable that I need to set in the task? \nThe difference between the first code and the second code: The second code uses pygame.mixer and plays sound files. In the script, the sound files are in dictionaries (e.g. sound = {\"word\" : \"\/absolute\/path\/to\/file.wav\", \"word2\" : ...etc} As I said this code runs fine in terminal.\nSo why does the one script work and not the other. Both use pygame. The other just uses sound, dictionaries instead of strings, and pygame.mixer as well. My reasoning is that there is an issue with crontab getting stuck on one of these things.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":412,"Q_Id":55698386,"Users Score":0,"Answer":"I fixed it. I was running it out of root. When I ran the crontab in the user it worked. It must be because the root couldn't get at the files.\nImportant tips is to add 'import os' and at some point in the script add 'print(os.environ)' to check all the environment variables when it runs in terminal.\nThen copy the $PATH variables to the top of the crontab jobs.\nSame with $SHELL.\nThe $DISPLAY variables need to be put in the line, so for example '* * * * * export DISPLAY=:0 && \/usr\/bin\/python \/home\/user\/file.py'\nSee how I put absolute paths for both the command and the path to file. I also set absolute paths to files in the script, even if the files are in the same folder as the script. I'm not sure if this is necessary I will check that next. I've seen a lot of people struggle with this issue and the advice usually comes down to these things.","Q_Score":0,"Tags":"python,dictionary,cron,pygame","A_Id":55755005,"CreationDate":"2019-04-15T23:08:00.000","Title":"Crontab executes python script but something is wrong","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"GRPC server does queue the requests and serve them based on the maxWorker configuration which is passed when the sever starts up. How do I print the metric- number of items in the queue .? Essentially, I would like to keep track of the numbers of requests in waiting state.","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":2149,"Q_Id":55699452,"Users Score":0,"Answer":"You can pass your own executor to serverBuilder.executor(). Note that you are then responsible for shutting down the executor service after the server has terminated.","Q_Score":3,"Tags":"grpc,grpc-java,grpc-python","A_Id":55712069,"CreationDate":"2019-04-16T01:49:00.000","Title":"keep track of the request queue in grpc server","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Is there a way I can access a python virtual environment created by another user on an Ubuntu machine ? \nThanks!","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":575,"Q_Id":55709041,"Users Score":0,"Answer":"well I get it to work using the following command with different user, \n$ . env_name\/bin\/activate\nnote that I needed to grant write & execute rights on the venv files to the current user.","Q_Score":0,"Tags":"python,virtualenv","A_Id":55763629,"CreationDate":"2019-04-16T13:12:00.000","Title":"Access Python virtual environment","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'd like to use eclipse and PyDev as my Python development environment. I have downloaded the eclipse installer (2019-03 version), however this presents options for \"Java Developers\", \"C\/C++ Developers\", \"PHP Developers\", etc., with no option for Python developers.\nI'm thinking each of the available options may include large amounts of functionality I don't need, leading to a bloated install. So, which is the most stripped-back minimum install that I can install the PyDev plugin over?","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":833,"Q_Id":55709550,"Users Score":0,"Answer":"There are a couple of options for using Eclipse as an IDE for a Python interpreter. It is worth pointing out the following points with respect to PyDev, the plugin that may be used in Eclipse...\n\nYou can use the latest version of Eclipse. You don't need Eclipse Neon, for example.\nYou need to install a working version of Python, I used 3.8.1.\nWhen opening your new Eclipse workspace be sure to click on the marketplace link so that you can search and install PyDev, the plugin you will be using within Eclipse.\nOnce PyDev is successfully installed, be sure your preferences acknowledge that the interpreter is in fact Python in Eclipse: Eclipse >> PyDev >> Interpreter - Python\nFrom here you can create and build applications using .py file extension where right clicking your code results in running the selected code.","Q_Score":0,"Tags":"python,eclipse,pydev,eclipse-installer","A_Id":59812927,"CreationDate":"2019-04-16T13:37:00.000","Title":"What is the most lightweight eclipse install for PyDev project?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I can't understand the difference between dag_concurrency and parallelism. documentation and some of the related posts here somehow contradicts my findings.\nThe understanding I had before was that the parallelism parameter allows you to set the MAX number of global(across all DAGs) TaskRuns possible in airflow and dag_concurrency to mean the MAX number of TaskRuns possible for a single Dag.\nSo I set the parallelism to 8 and dag_concurrency to 4 and ran a single Dag. And I found out that it was running 8 TIs at a time but I was expecting it to run 4 at a time. \n\nHow is that possible? \nAlso, if it helps, I have set the pool size to 10 or so for these tasks. But that shouldn't have mattered as \"config\" parameters are given higher priorities than the pool's, Right?","AnswerCount":2,"Available Count":1,"Score":0.4621171573,"is_accepted":false,"ViewCount":4743,"Q_Id":55722733,"Users Score":5,"Answer":"The other answer is only partially correct:\ndag_concurrency does not explicitly control tasks per worker. dag_concurrency is the number of tasks running simultaneously per dag_run. So if your DAG has a place where 10 tasks could be running simultaneously but you want to limit the traffic to the workers you would set dag_concurrency lower. \nThe queues and pools setting also have an effect on the number of tasks per worker. \nThese setting are very important as you start to build large libraries of simultaneously running DAGs. \nparallelism is the maximum number of tasks across all the workers and DAGs.","Q_Score":10,"Tags":"python,airflow","A_Id":55786029,"CreationDate":"2019-04-17T08:02:00.000","Title":"what's the difference between airflow's 'parallelism' and 'dag_concurrency'","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Can anyone help me with Databricks and Azure function?\nI'm trying to pass data bricks JSON output to azure function body in ADF job, is it possible? \nIf yes, How? \nIf No, what other alternatives to do the same?","AnswerCount":2,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":5514,"Q_Id":55727018,"Users Score":1,"Answer":"In Azure Databricks, there is a way to return a value on exit. dbutils.notebook.exit(myReturnValueGoesHere)\nIn Azure Data Factory V2, the DatabricksNotebook activity outputs JSON with 3 fields:\n\"runPageUrl\" , a URL to see the output of the run.\n\"effectiveIntegrationRuntime\" , where the code is executing\n\"executionDuration\"\nIf you use the above dbutils call,  a fourth field will appear in the output JSON\n\"runOutput\" , where the \"myReturnValueGoesHere\" is displayed.\nIf you do not use the above dbutils call, you can scrape information from the runPageUrl.","Q_Score":4,"Tags":"python,json,azure-functions,azure-data-factory-2,azure-databricks","A_Id":55735608,"CreationDate":"2019-04-17T11:54:00.000","Title":"Can we pass Databricks output to function in an ADF Job?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I added my applications on DigitalOcean. But when I turn on my website I see the error. \"502 Bad Gateway nginx\/1.14.0 (Ubuntu)\". I would like to solve it, but I do not know where I can find logs with errors.\nI always used CMD and when I tried to turn on the server, if something did not work, the CMD clearly said what was wrong. Where can I find something like this on DigitalOcean. I used PythonAnywhere once, and there was a separate tab with information about errors (practically the same as in CMS). Please forgive me for simple questions, I have little experience in servers and GIT.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":1046,"Q_Id":55730655,"Users Score":1,"Answer":"502 probably means you got some errors in your application - you'd better check out your gunicorn(or other WSGI server) logs. Location of the logs depends on what WSGI server you're using but probably you can check it out in WSGI's config file.\nAlso you can try to do standard 'runserver' just to ensure that your application can run correctly. \nps aux | grep gunicorn (or smth like this command) can tell you if it's runnning.\nIf it's not, chek out the logs. Also, you can go to your config file, check the command that you're trying to use to start the server, try it out in the console.\nIn final you can ensure that your nginx config is correct too with nginx -t command.","Q_Score":0,"Tags":"python,django,digital-ocean","A_Id":55731993,"CreationDate":"2019-04-17T15:00:00.000","Title":"502 Bad Gateway. After implementing the application on 'digitalocean'","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I have a RHEL system which by default was running Python2.7 and Python3.4 \nI needed Python3.6 for a project I wanted to work on and so I downloaded it and built it from source. I ran make and make install which hindsight may have been the wrong decision. \nNow I do not seem to have any internet connectivity. Does anyone know what I may have over written to cause this or at least where specifically I can look to track this issue down? \nNote: I can Putty into the Linux machine but it doesn't seem to have any other connectivity, specifically HTTPS","AnswerCount":3,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":66,"Q_Id":55733530,"Users Score":0,"Answer":"It's a bit weird that this would break network connectivity. One possible explanation is that the system has networking scripts or a network manager that relies on Python, and it got broken after make install replaced your default Python installation. It may be possible to fix this by reinstalling your RHEL Python packages (sorry, cannot offer more detailed help there, as I don't have access to a RHEL box).\nI guess the lesson is \"be careful about running make install as superuser\". To easily install and manage different Python versions (separate from the system Python), the Anaconda Python distribution would be a good solution.","Q_Score":0,"Tags":"python-3.x,makefile,centos,redhat","A_Id":55734315,"CreationDate":"2019-04-17T18:01:00.000","Title":"RHEL 7.6 - Built Python3.6 from Source Broke Network","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a RHEL system which by default was running Python2.7 and Python3.4 \nI needed Python3.6 for a project I wanted to work on and so I downloaded it and built it from source. I ran make and make install which hindsight may have been the wrong decision. \nNow I do not seem to have any internet connectivity. Does anyone know what I may have over written to cause this or at least where specifically I can look to track this issue down? \nNote: I can Putty into the Linux machine but it doesn't seem to have any other connectivity, specifically HTTPS","AnswerCount":3,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":66,"Q_Id":55733530,"Users Score":0,"Answer":"So after a lot of time slamming my head against the wall I got it worked out. My best guess is that the system (RHEL 7) relied on something from its default Python2.7 installation to handle SSL negotiations. Installing 3.6 alongside must have overwritten some pointer. Had I done this correctly, with altinstall all would have likely been fine.\nThe most frustrating part of this is that there were no error messages, connections just timed out. \nTo fix this, I had to uninstall all Python versions and then reinstalled Python2.7 - Once Python2 was back in the system it all seemed to work well.","Q_Score":0,"Tags":"python-3.x,makefile,centos,redhat","A_Id":55763685,"CreationDate":"2019-04-17T18:01:00.000","Title":"RHEL 7.6 - Built Python3.6 from Source Broke Network","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm trying to compile a library which takes the path to python3-config as one of it's arguments i.e. -DPYTHON_CONFIG=python3-config then sets various compiler flags based on it's contents. This file exists on my machine for python 3.6 as that's the system version, but I'm trying to build the library using a python 3.7.1 pyenv+virtualenv so I need to generate a corresponding python3-config for each specific python environment. How can I do this? All I've found so far is this file is generated by sudo apt-get install python-dev\nEdit: I've discovered that pyenv python3-config exists in \/home\/david\/.pyenv\/shims\/python\/python3-config but this version is much smaller than the version from \/usr\/bin\/python3-config","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":2098,"Q_Id":55738280,"Users Score":1,"Answer":"I figured it out myself\nAssuming pyenv is installed in the recommended way, and python 3.7.1 is installed using pyenv then the paths to the required bin and config are:\n\n~\/.pyenv\/versions\/3.7.1\/bin\/python3.7\n~\/.pyenv\/versions\/3.7.1\/bin\/python3.7-config\n\npython3.7-config is a script which takes arguments like --includes and returns the info the build system requires to build and link the python extension for the specified pyenv, i.e.\n\n$ ~\/.pyenv\/versions\/3.7.1\/bin\/python3.7-config --includes\n-I\/home\/david\/.pyenv\/versions\/3.7.1\/include\/python3.7m","Q_Score":2,"Tags":"python,python-3.x,pyenv","A_Id":55770221,"CreationDate":"2019-04-18T02:22:00.000","Title":"Generate python3-config for pyenv + virtualenv","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I want to run pulsar along with apache airflow. The catch is that both run on port number 8080. I do not want to change Airflow's configuration but in order to make pulsar run, I have to assign it another port. I am using a Python library, which runs airflow on 8080.\nI tried going through the standalone installation document but could not get anything through it. My aim is to run the Python client of Pulsar.\nHow do I change the port configuration of Pulsar?","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":704,"Q_Id":55739811,"Users Score":1,"Answer":"For standalone, you can edit the conf\/standalone.conf config file and set webServicePort=8081","Q_Score":1,"Tags":"python,python-3.x,apache-pulsar","A_Id":55750424,"CreationDate":"2019-04-18T05:48:00.000","Title":"How do I change the port on which Pulsar is running?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have installed pip3 virtualenv and installed couple of packages to it by activating the virtualenv. At that time, the command which python gives the path of virtualenv. lets say ....\/env\/bin\/python\nBut after deactivate and source the path again (reactivating) which python uses the global path \/usr\/bin\/python which doesn't allow to use the packages I installed to virtualenv. Any thought of that?","AnswerCount":2,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":648,"Q_Id":55740123,"Users Score":0,"Answer":"It was a stupid mistake.\nthe virtualenv maintain a script in directory ....\/env\/bin named activate\nAnd the file uses absolute path to the export PATH and guess what can go wrong.\nLet's say the absolute PATH is \/home\/user\/test\/env\/bin\nAnd if you rename the directory test into test2. The activating file still uses old absolute path. So you have to manually change the PATH under ...\/env\/bin\/activate and change the VIRTUAL_ENV variable to your new absolute path","Q_Score":0,"Tags":"python,path,pip,virtualenv","A_Id":55740717,"CreationDate":"2019-04-18T06:19:00.000","Title":"pip virtualenv reset the path after reactivating","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have installed pip3 virtualenv and installed couple of packages to it by activating the virtualenv. At that time, the command which python gives the path of virtualenv. lets say ....\/env\/bin\/python\nBut after deactivate and source the path again (reactivating) which python uses the global path \/usr\/bin\/python which doesn't allow to use the packages I installed to virtualenv. Any thought of that?","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":648,"Q_Id":55740123,"Users Score":0,"Answer":"Normally it does not happen. upon reactivating it should pick from virtualenv python. \nMy two cents. \n\nVirtualenv adding the python in end of PATH variable. so\nusr\/bin\/python will be in front found n run.\nIt also can happen if your .bash_profile got issues. It may also\nif virtual env is created in python3 and by default it will have\npython2.7\n\nSo you need to check both path and both env global vs virtual env one.","Q_Score":0,"Tags":"python,path,pip,virtualenv","A_Id":55740509,"CreationDate":"2019-04-18T06:19:00.000","Title":"pip virtualenv reset the path after reactivating","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am running an airflow DAG and wanted to understand how the execution date gets set. This is the code I am running: \n{{ execution_date.replace(day=1).strftime(\"%Y-%m-%d\") }} \nThis always returns the first day of the month. This is the functionality that I want, but I just want to find a way to understand what is happening.","AnswerCount":2,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":495,"Q_Id":55748657,"Users Score":1,"Answer":"The reason this always returns the first of the month is that you are using a Replace to ensure the day is forced to be the 1st of the month. Simply remove \".replace(day=1)\".","Q_Score":2,"Tags":"python,airflow","A_Id":55748730,"CreationDate":"2019-04-18T14:54:00.000","Title":"Understanding execution_date in Airflow","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am running an airflow DAG and wanted to understand how the execution date gets set. This is the code I am running: \n{{ execution_date.replace(day=1).strftime(\"%Y-%m-%d\") }} \nThis always returns the first day of the month. This is the functionality that I want, but I just want to find a way to understand what is happening.","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":495,"Q_Id":55748657,"Users Score":0,"Answer":"execution_date returns a datatime object. You are using the replace method of that object to replace the \u201cday\u201d with the first. Then outputting that to a string with the format method.","Q_Score":2,"Tags":"python,airflow","A_Id":55750885,"CreationDate":"2019-04-18T14:54:00.000","Title":"Understanding execution_date in Airflow","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I created a Python script (format .py) that works.\nI would like to convert this file to .exe, to use it in a computer without having Python installed.\nHow can I do?\nI have Python from Anaconda3.\nWhat can I do?\nThank you!\nI followed some instruction found here on Stackoverflow.\n.I modify the Path in the 'Environment variables' in the windows settings, edited to the Anaconda folder.\n.I managed to install pip in conda prompt (I guess).\nStill, nothing is working. I don't know how to proceed and in general how to do things properly.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":2453,"Q_Id":55760356,"Users Score":2,"Answer":"I personaly use pyinstaller, its available from pip.\nBut it will not really compile, it will just bundle.\nThe difference is compiling means translating to real machine code while bundling is creating a big exe file with all your libs and your python interpreter.\nEven if pyinstaller create bigger file and is slower than cython (at execution), I prefer it because it work all the time without work (except lunching it).","Q_Score":0,"Tags":"python-3.x,windows,anaconda,executable","A_Id":55760631,"CreationDate":"2019-04-19T10:22:00.000","Title":"How to convert file .py to .exe, having Python from Anaconda Navigator? (in which command prompt should I write installation codes?)","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a Nvidia Jetson tx2 with the orbitty shield on it. \nI got it from a friend who worked on it last year. It came with ubuntu 16.04. I updated everything on it and i installed the latest python3.7 and pip.\nI tried checking the version of opencv to see what i have but when i do import cv2 it gives me :\nTraceback (most recent call last):\n  File \"\", line 1, in \nModuleNotFoundError: No module named 'cv2'\nSomehow besides python3.7 i have python2.7 and python3.5 installed. If i try to import cv2 on python2.7 and 3.5 it works, but in 3.7 it doesn't. \nCan u tell me how can i install opencv in python3.7 and the latest version?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":1498,"Q_Id":55764829,"Users Score":0,"Answer":"Does python-3.7 -m pip install opencv-python work? You may have to change the python-3.7 to whatever path\/alias you use to open your own python 3.7.","Q_Score":2,"Tags":"python,opencv,ubuntu","A_Id":55764936,"CreationDate":"2019-04-19T16:25:00.000","Title":"How can i install opencv in python3.7 on ubuntu?","Data Science and Machine Learning":1,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"1) I'm running into a problem with my script using arguments parsed with argparse.ArgumentParser\nso I'd like to be able to check typing of my script but when I add some arguments, I get a unrecognized arguments: --import_dir \/tmp\/someDir\/ running \nmypy myscript.py --import_dir \/tmp\/someDir\nit seems that the arguments are passed to mypy and not myscript.py. Is there a way to get rid of that?\n2) More than that, I'm using pyenv to set my version of python to be able to have types on a debian stable system. So if I run only my python script without arguments, I run into a Variable annotation syntax is only supported in Python 3.6 and greater\n problem because the system version is the stable debian version.","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":490,"Q_Id":55778643,"Users Score":1,"Answer":"mypy is a tool for use during development. You typically don't run it at all in production, as the code itself isn't changed by deploying it. Any differences between your two environments should by definition be runtime changes, which mypy doesn't help with.\nAssuming mypy myscript.py passes before deployment, it will continue to do so after, so there is no need to run it in production.\nIn the end, Python is and will remain a dynamically typed language; static type hinting is a tool for finding and preventing bugs, but doesn't affect how your code ultimately runs.","Q_Score":0,"Tags":"python,mypy,pyenv","A_Id":55782834,"CreationDate":"2019-04-20T23:34:00.000","Title":"python: mypy with arguments to script","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a SQL Server Agent job that executes some python scripts using CmdExec. Everything is set up with a proxy account as expected.\nWhen I run the job I get: \nMessage\nExecuted as user: domain\\proxyaccount. 'python' is not recognized as an internal or external command,  operable program or batch file.  Process Exit Code 1.  The step failed.\nI'm using Anaconda and Python is in the system PATH variable. When I run python from command line, it works. When I run python cutting and pasting the specific command from the job, it works. When I use runas to mimic the proxy account it works. The only place Python doesn't run is form inside the job. \nWhat else do I need to look at to trouble shoot this issue?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":293,"Q_Id":55778669,"Users Score":1,"Answer":"You should restart SQL Server Agent after you installed Python on the server.\nIt is necessary for SQL Server Agent to load new environment variables, including the updated PATH with Python in it.\nThere are also suggestions to restart SQL Server too, but I believe restarting SQL Server Agent will be enough.","Q_Score":0,"Tags":"python,sql-server,sql-server-agent","A_Id":55784557,"CreationDate":"2019-04-20T23:40:00.000","Title":"Python Won't Run Even Through It Is In the Path","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am fairly new to Python. I have a django based web application where I am performing some tasks using Kafka. \nI am using confluent-kafka wrapper to communicate with the Kafka Broker.\nSo once a topic is created on the kafka broker, I assign a consumer to subscribe to this process, to make this non-blocking, I am using multiprocessing module so that the consumer runs on a separate thread and not block the main application thread.\nHowever, I am not sure, what will happen if my server shuts down? Will the process still run like how the cronjobs still run even if the server is not running?\nIf not can someone please suggest me how should I trigger my consumer so that it is independent of my django server?","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":1108,"Q_Id":55781423,"Users Score":0,"Answer":"If you need your web server to actually get the data from Kafka, they need to be running together.\nYou probably don't want the consumer actively running in the background (as a separate process, not a thread) because then you're effectively not processing messages. \nDepending on what your data is, you could use Kafka Connect on the same machine as Django to write the Kafka events to a database, then Django would query the database instead","Q_Score":0,"Tags":"django,python-3.x,multithreading,apache-kafka","A_Id":55784029,"CreationDate":"2019-04-21T09:16:00.000","Title":"How to create a kafka consumer independent of Django server","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I am fairly new to Python. I have a django based web application where I am performing some tasks using Kafka. \nI am using confluent-kafka wrapper to communicate with the Kafka Broker.\nSo once a topic is created on the kafka broker, I assign a consumer to subscribe to this process, to make this non-blocking, I am using multiprocessing module so that the consumer runs on a separate thread and not block the main application thread.\nHowever, I am not sure, what will happen if my server shuts down? Will the process still run like how the cronjobs still run even if the server is not running?\nIf not can someone please suggest me how should I trigger my consumer so that it is independent of my django server?","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":1108,"Q_Id":55781423,"Users Score":0,"Answer":"bind the signals:\nsignal.signal(signal.SIGTERM, signal_handler)\nsignal.signal(signal.SIGINT, signal_handler)\nand use try-except blok and you can do a clean up afterwards.\nto make consumer more independend, you can use django-celery-beat","Q_Score":0,"Tags":"django,python-3.x,multithreading,apache-kafka","A_Id":69200577,"CreationDate":"2019-04-21T09:16:00.000","Title":"How to create a kafka consumer independent of Django server","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"My use case needs to store the data on a disk immediately when the data is available. I'm using Raspberry PI and few lasers. Once the laser is activated\/deactivated timestamp is taken and it should be stored on the disk. Data is only stored when lasers are \"armed\". They can also be in \"idle\" state (they're still working, but timestamps are ignored). Also, lasers can be armed\/disarmed multiple times. \nWhat would be the most efficient way of doing this? Using plane csv\/xml\/txt or something else? Actual SD card that is used in RPI is limited to 8GB. \nAnother question, when using open() method, should i close() the file once i executed write() method or should I keep it open as long as the script itself is running (script is running all the time until user decides to quit)?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":33,"Q_Id":55791341,"Users Score":0,"Answer":"Sounds like python?\nIf so, you can write to your file using with:\n\nwith open('\/path', 'w') as f:\n      f.write('stuff')\n\nand the file descriptor will close automatically when execution exits the block.\nHowever, regarding your other questions it depends on your use case. Why does it need to be available immediately? Will another process be reading it? How quickly will this be happening? Are there any other bits of data you need to save along with the timestamp - presumably whether the laser is on or off at that time?\nLikely, a good solution for you would be a lightweight database such as SQLite. The storage on disk is approximately what it would be in a \"flat\" file, such as the .txt or .csv you reference. It will be fast. And it eliminates concern about managing the actual writing.","Q_Score":0,"Tags":"python-2.7,persistence","A_Id":55791537,"CreationDate":"2019-04-22T08:22:00.000","Title":"Persistent storage of data?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have an application which handles websocket and http requests for some basic operations and consuming push data over sockets. Nothing is very computation intensive. Some file tailing, occasional file read \/ write is all that it has to do with heavy processing currently. I want to deploy this to Linux. I have no static files to handle \nCan a tornado application handle 50-100 websocket and http clients without needing ngnix ? I don't want to use another server for this. How many clients can  it handle on its own ?\nEverywhere I search I get ngnix, and I don't want to involve it","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":132,"Q_Id":55801051,"Users Score":1,"Answer":"Yes, Tornado can easily handle 50-100 websocket and http clients without needing Ngnix. You only need Nginx as a reverse proxy if you're running multiple Tornado processes on separate ports. \nIf you're running a single process or multiple process on a single port, you don't need Nginx.\nI've seen benchmarks which show that with a single Tornado process, you can serve around 5,000 connections per second if your response message size is around 100 KB; and over 20,000 requests per second for 1 KB response size. But this also depends on your CPU speed.\nI think it's safe to assume with an average CPU and around 1 GB RAM, you can easily serve around a 2,000-3,000 requests per second.","Q_Score":0,"Tags":"python,server,tornado,production-environment","A_Id":55805718,"CreationDate":"2019-04-22T20:57:00.000","Title":"Can tornado support 50 -100 websocket clients using its default http server without involving ngnix","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to use Google Cloud Profiler in a python script running locally. It seems it is having problems to connect with a metadata server:\n\nWARNING:googlecloudprofiler.client:Failed to fetch instance\/zone from GCE metadata server: HTTPConnectionPool(host='metadata', port=80): Max retries exceeded with url: \/computeMetadata\/v1\/instance\/zone (Caused by NewConnectionError(': Failed to establish a new connection: [Errno -2] Name or service not known',))\nWARNING:googlecloudprofiler.client:Failed to fetch instance\/name from\n  GCE metadata server: HTTPConnectionPool(host='metadata', port=80): Max\n  retries exceeded with url: \/computeMetadata\/v1\/instance\/name (Caused\n  by NewConnectionError(': Failed to establish a new connection: [Errno -2] Name\n  or service not known',))\n\nSince the app seems to be running correctly and the profiler is collecting data successfully, is it OK if I just ignore the warnings or will I likely encounter some problems in the future?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":588,"Q_Id":55813180,"Users Score":2,"Answer":"If you're running locally (and haven't, for example, manually zone in the config), these warnings are expected, so ignoring them is definitely okay.\n(Disclosure: I work at Google on Stackdriver Profiler)","Q_Score":0,"Tags":"python,google-cloud-platform,google-cloud-profiler","A_Id":56082596,"CreationDate":"2019-04-23T14:09:00.000","Title":"google-cloud-profiler metadata server WARNING","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I've installed Cygwin and Python in Windows, but now having added both pip and virtualenv packages, when I try to use them in the Cygwin command line I get -bash: pip: command not found and the same message for virtualenv. When I run python -m ensurepip it says the requirement is already satisfied. But when I go back to use it again, it is still missing.\nCould it have something to do with where I've stored the local package directory? It's not in my main Cygwin directory.\nI am new to Cygwin, so I could be missing something obvious. Thoughts?\nUPDATE: I found pip. It's called pip2, so when I called pip, nothing happened. So this leads me to wonder if virtualenv has an alternate name as well. I did a pip2 freeze and virtualenv is indeed installed but I still can't seem to call it.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":265,"Q_Id":55816661,"Users Score":2,"Answer":"It turns out I could not call pip or virtualenv because they were from packages for Python 2.7 and had been renamed to pip2 and virtualenv-2.7 and have to be called that way in the command line. I'm reviving an old project with old requirements, so I'm using this older version of Python.","Q_Score":0,"Tags":"python,windows,package,cygwin","A_Id":55818784,"CreationDate":"2019-04-23T17:37:00.000","Title":"Why are these installed packages not found in Cygwin?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have huge size data (in TBs or PBs) in my HDFS which is located at remote PC. Now instead of taking Data to the Transformation Logic (which is not correct and efficient), I want to run my python Transformation Logic itself on the location where my Data is stored.\nSeeking some useful ideas about the technologies which can be used to fulfill this requirement.\nThings which I tried till now:\n1) Approach 1\n\nTook SSH Connection of Remote PC (where HDFS data is available), Copied my python Transformation Logic there and executed after fetching the data from HDFS.\n\n2) Approach 2\n\nLoaded HDFS data to Apache Spark RDDs which is on Remote PC where HDFS data is available and executed Spark Job from another PC.\n\nPlease suggest other technologies which can be used for Logic Execution remotely.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":42,"Q_Id":55822254,"Users Score":0,"Answer":"I would suggest setting up a Spark Cluster in the same local network where you have the data and running spark transformations in the cluster remotely (SSH or Remote Desktop). The advantages of the setup are:\n\nNetwork Latency will be minimised as the data is transferred in the\nsame network locally.\nRunning the transformations with distributed and in-memory processing engines like Apache Spark is fast.\n\nNote: Please ignore if the response is in line with your second approach","Q_Score":0,"Tags":"python,apache-spark,hdfs,remote-access","A_Id":55825408,"CreationDate":"2019-04-24T04:04:00.000","Title":"How to run any Transformation Logic on HDFS data which is at Remote PC","Data Science and Machine Learning":1,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am writing a script to monitor a SNS for Live video.\nThe main program creates several multiprocess and put them into a pool. These multiprocess monitor different SNS accounts. Once live video is found, another process is started to record the video, so the script can continue monitor other accounts.\nThe problem is \"daemonic processes are not allowed to have children\".\nHow should I achieve what I want to do? Thanks.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":110,"Q_Id":55828232,"Users Score":0,"Answer":"use threading within multiprocessing daemon process","Q_Score":0,"Tags":"python,multiprocessing","A_Id":55864663,"CreationDate":"2019-04-24T10:44:00.000","Title":"How to start a non-blocking process within a multiprocess in Python 3","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I want to make my python program less pirateable. I know it's fruitless to make it entirely secure, but I want it to be at least somewhat easier than copying copying the installer and throwing it on piratebay.\nI've looked into verifying the MAC address of the user, but that either requires them to run the software first, or to give me their MAC address to get the software.\nI've also looked into spreading out the files after installation, but once again that only works if they don't just copy the installer\nIt's python, so it's not going to be hard to reverse engineer, and it's a desktop application, so it's going to be pirated. But a tiny amount of security will prevent the average user from just pirating it I hope.","AnswerCount":1,"Available Count":1,"Score":0.537049567,"is_accepted":false,"ViewCount":355,"Q_Id":55858250,"Users Score":3,"Answer":"The only secure way to prevent piracy is to make a crucial portion of your software server-side, and require that the user be connected to the Internet when running your software.","Q_Score":0,"Tags":"python,python-3.x,web,anti-piracy","A_Id":55858303,"CreationDate":"2019-04-25T22:07:00.000","Title":"How to ensure my software is not easy to pirate","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a Python WebJob living in Azure and I'm trying to pass parameters to it. \nI've found documentation saying that I should be able to post the URL and add:?arguments={'arg1', 'arg2'} after it. \nHowever, when I do that and then try to print(sys.argv) in my code, it's only printing the name of the Python file and none of the arguments I pass to it. \nHow do I get the arguments to pass to my Python code? I am also using a run.cmd in my Azure directory to trigger my Python code if that makes a difference. \nUPDATE: So I tested it in another script without the run.cmd and that certainly is the problem. If I just do ?arguments=22 66 it works. So how do I pass parameters when I'm using a run.cmd file?","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":184,"Q_Id":55870100,"Users Score":2,"Answer":"I figured it out: in the run.cmd file, you need to put \"%*\" after your script name and it will detect any arguments you passed in the URL.","Q_Score":1,"Tags":"python,azure,azure-webjobs","A_Id":55873033,"CreationDate":"2019-04-26T14:50:00.000","Title":"Python Azure webjob passing parameters","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I try to turn my pc off and restart it on LAN. \nWhen getting one of the commands (turnoff or restart), I execute one of the followings:\nsubprocess.call([\"shutdown\", \"-f\", \"-s\", \"-y\"])  # Turn off\nsubprocess.call([\"shutdown\", \"-f\", \"-r\", \"-t\", \"-c\", \"-y\"]) # Restart\nI'd like to inform the other side if the process was successfully initiated, and if the PC is in the desired state.\nI know that it is possible to implement a function which will check if the PC is alive (which is a pretty good idea) several seconds after executing the commands, but how one can know how many seconds are needed? And what if the PC will be shut down a moment after sending a message stating that it is still alive?\nI'm curious to know- what really happens after those commands are executed? Will the script keep running until the task manager will kill it? Will it stop running right after the command?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":35,"Q_Id":55882903,"Users Score":1,"Answer":"Programs like shutdown merely send a message to init (or whatever modern replacement) and exit immediately; it\u2019s up to it what happens next.  Typical Unix behavior is to first shut down things like SSH servers (which probably doesn\u2019t kill your connection to the machine), then send SIGTERM to all processes, wait a few seconds (5 is typical) for signal handlers to run, and then send SIGKILL to any survivors.  Finally, filesystems are unmounted and the hardware halt or reboot happens.\nWhile there\u2019s no guarantee that the first phase takes long enough for you to report successful shutdown execution, it generally will; if it\u2019s a concern, you can catch the SIGTERM to buy yourself those few extra seconds to get the message out.","Q_Score":0,"Tags":"python,multithreading,subprocess,task,shutdown","A_Id":55883196,"CreationDate":"2019-04-27T17:03:00.000","Title":"What happens after shutting down the PC via subprocess?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I receive selenium.common.exceptions.WebDriverException: Message: Service \/usr\/bin\/google-chrome unexpectedly exited. Status code was : 0\nFor background, this is a Linux system and I am typing all the information in the terminal. I looked at many questions. A lot of them recommending uninstalling and reinstalling Chrome. I did that several times. I typed in whereis Google Chrome and found the location. I did not get a .exe file though so I used \"\/usr\/bin\/google-chrome\". Linux doesn't appear to create a .exe file. I am bringing this up because I am not sure if this contributed to my error.\nThis is after I typed in \nmy_path = \"\/usr\/bin\/google-chrome\"\nbrowser = webdriver.Chrome(executable_path=my_path)\nI get many lines of responses on the terminal referencing files in my python3.6 library. Before the main error of it saying it exited unexpectedly, I get \n\"file \"home\/ganesh\/.local\/lib\/python3.6\/site-packages\/selenium\/webdriver\/chrome\/webdriver.py, line 73 in init\"\n\"file \"home\/ganesh\/.local\/lib\/python3.6\/site-packages\/selenium\/webdriver\/chrome\/webdriver.py, line 98 in start\"\nThe thing is that my terminal successfully opens the Chrome browser. However, I get the webdriver exception message I had.\nIn addition, the code ,\nbrowser = webdriver.Chrome(executable_path=my_path)\nclearly didn't fully work because later in the program when I type in \nbrowser.(something else), it doesn't work and says \"name 'browser' is not define\"\nI am hoping for the webdriver exception error to be resolved and for me to successfully be able to call browser in my code later on\nThis question is not a duplicate as marked by someone here. The question that he referred to as answering my question does not answer my question - in that version Chrome exited. In mine, Chrome did not exit, it stayed open. In addition, the previous question has solutions in Windows and Mac, but not for Linux which is my operating system.\nIt is my first week using Linux.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":87,"Q_Id":55885675,"Users Score":1,"Answer":"Welcome to SO. If the chromedriver file is located in \/usr\/bin\/google-chrome folder then your my_path should be my_path = \"\/usr\/bin\/google-chrome\/chromedriver\"","Q_Score":0,"Tags":"python,linux,python-3.x,google-chrome,selenium-webdriver","A_Id":55885757,"CreationDate":"2019-04-27T23:19:00.000","Title":"Chrome opens succesfully from terminal but I get webdriver common exception message","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I want to host a python script on Google Cloud which would run indefinitely. \nWhich Google Cloud Products can be used to achieve this reliably and economically?\nis this possible on AppEngine?","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":1103,"Q_Id":55890781,"Users Score":2,"Answer":"Within GCP there are a number of ways to run processing logic.  We have App Engine, Functions, Compute Engine, GKE, Cloud Run and more.  Of these, Compute Engine and GKE provide the lowest level control meaning that you can orchestrate code to run 100% of the time ... and basically do anything you want.  Based on your story, it sounds like a Compute Engine would be what you want.  When you create a Compute Engine, you are basically given a Virtual Machine (commonly Linux) and you simply run what ever logic \/ applications you want within that environment.  Google charges you for the duration that the Compute Engine runs.  If you have an always running explicit Python app, then you will be billed 24x7 irrespective of whether or not traffic is actually arriving.\nOther capabilities that you are likely going to want to consider are Cloud Functions.  A Cloud Function is logic that runs only when there is an active request to be processed.  It is GCP's responsibility to passively listen for new requests without charging you for that service.  When a request arrives, your logic is executed and you are billed only for the duration that your logic ACTUALLY executes.  Cloud Run is similar to Cloud Functions but the logic is hosted in a Kubernetes environment as opposed to native.\nFor Cloud Function, incoming requests can arrive either via REST requests or via GCP Pub\/Sub.  In your description, neither of these apply as you are receiving data via MQTT.  This is where Google IOT Core comes into play.  Google IoT core is a full suite environment for managing IoT devices.  Primary among this story is the ability to passively listen for incoming MQTT requests.  When an authorized IoT device sends in an MQTT request, the Google IoT core automatically forwards the content of the MQTT request via GCP Pub\/Sub.  This then decouples the mechanics of the arriving IoT message from how it will be eventually processed.  Since the MQTT message has now been published to GCP Pub\/Sub, this can then be used as a trigger for a Google Cloud Function.\nFollowing all these parts ... one possibility to examine which may result in the cheapest and more dynamically scalable solution would be:\nIoT Device --- MQTT ---> IoT Core --- Pub\/Sub ---> Cloud Function\nThis story has basically changed the paradigm from \"How do I actively listen for requests in my code in an indefinite manner\" to \"How do I have my code executed when a request arrives\".","Q_Score":2,"Tags":"python,google-app-engine,google-cloud-platform","A_Id":55892588,"CreationDate":"2019-04-28T13:36:00.000","Title":"Always Running Python Script on Google Cloud","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"When I try to check appium version with 'appium -v' I receive command not found. What can I do? \nI tried different options but it's not working","AnswerCount":2,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":2575,"Q_Id":55902054,"Users Score":1,"Answer":"If you are on Mac OS try\n\nappium --version","Q_Score":0,"Tags":"python-appium","A_Id":69764939,"CreationDate":"2019-04-29T11:06:00.000","Title":"When I try to check appium version with 'appium -v' I receive command not found. What can I do?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am quite beginner in python. I am using Spyder (Python 3.6) (Anaconda distribution). I am trying to access the azure blob storage from python script. I have installed Azure environment using Anaconda Navigator. I am importing BlockBlobService from azure.storage.blob. However, I am getting error ModuleNotFoundError:No module named 'azure.storage'. \nIs there something missing in order to access the azure blob storage?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":686,"Q_Id":55906301,"Users Score":0,"Answer":"Just for summary, your issue is resulted from the conflict between python 2.7 version you installed and the python version with Anaconda.\nThe packages you installed should to be in the python 2.7 environment. However, spyder uses the Anaconda self-brought python environment.\nCommand line uses system python environment which is determined by the the previous python environment variable in the path.","Q_Score":0,"Tags":"python,azure","A_Id":55906648,"CreationDate":"2019-04-29T15:17:00.000","Title":"How to fix \"ModuleNotFoundError: No module named 'azure.storage' \"?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I created a a very simple test that launches and close a software I was testing using Python Nose test platform to track down a bug in the start up sequence of the software I was working on.  \nThe test was set up so that it would launch and close about 1,500 times in a singling execution.\nA few hours later, I discovered that the test was not able to launch to the software around after 300 iterations.  It was timing out while waiting for the process to start.  As soon as I logged back in, the test started launching the process without any problem and all the tests started passing as well.\nThis is quite puzzling to me.  I have never seen this behavior.  This never happened on Windows also.  \nI am wondering if there is a sort of power saving state that Mac was waiting for currently running process to finish and prohibits new process from starting.\nI would really appreciate if anybody can shed light on this confusion.\nI was running Python 2.7.x on High Sierra.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":43,"Q_Id":55908161,"Users Score":0,"Answer":"I am not aware of any state where the system flat out denies new processes while old ones are still running.\nHowever, I can easily imagine a situation in which a process may hang because of some unexpected dependency on e.g. the window server. For example, I once noticed that rsvg-convert, a command-line SVG-to-image converter, running in an SSH session, had different fonts available to it depending on whether I was also simultaneously logged in on the console. This behavior went away when I recompiled the SVG libraries to exclude all references to macOS specific libraries...","Q_Score":0,"Tags":"python,macos,macos-sierra,macos-high-sierra","A_Id":55908436,"CreationDate":"2019-04-29T17:23:00.000","Title":"Mac power save state - what is the state of still running existing process but can't launch new process?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I created a simple python script which can give what kind of operating system it is using. But I want this script to run multiple remote machine at a same time without installing it on other machine on the same network. Is it possible to run this script on remote machine without installing this script on remote machine? . I saw with ssh python can do this .","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":771,"Q_Id":55927505,"Users Score":1,"Answer":"Based on the way your question is worded, I think the answer is no.\nIf you want to run a python script on a remote machine, you will need to have a python interpreter of some kind available on the remote machine to execute the code.","Q_Score":0,"Tags":"python,python-3.x,sockets,ssh","A_Id":55927622,"CreationDate":"2019-04-30T19:25:00.000","Title":"How to run python script on multiple remote machine? without installing the script?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a test case needed to access a .sh file. I used \nRun Process   ${filename},but it threw the error OSError: [Errno 13] Permission denied .  I tried to put chomod 777 before Run Process, but robot could not recognize it and robot took it as part of file path. Robot Anyone could help?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":676,"Q_Id":55938777,"Users Score":3,"Answer":"When you trying to run external commands via the  Run process  keyword,you have missed tab space.\nRun process   chmod   -R     777    yourfileName","Q_Score":0,"Tags":"python,automated-tests,robotframework","A_Id":55945288,"CreationDate":"2019-05-01T15:35:00.000","Title":"How to give .sh file read and write permission while use command \"run process\" in robot framework","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm new to Docker and I'm trying to figure out if there's a way to accomplish the next scenario: \n1. Python and all necessary packages installed on a docker container.\n2. My code editor is running on my local machine.\n3. When the script is changed, the container will re-run the script and give me the output. \nThe point is that I don't want to rebuild the image and rerun the container after every change I'll make.\nI just want to write the code \"locally\" and execute it as fast as possible in a container which running python.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":29,"Q_Id":55940125,"Users Score":0,"Answer":"A simple method:\n1. Create a Dockerfile that EXPOSE the correct ports and installs the correct system and python packages\n2. Specify the container command to be something like a RUN sleep 3600 or RUN tail -f \/dev\/null to keep the container running\n3. Run the Docker container with a volume mount to your code directory  \nYou can edit your code with your local editor and run your tests with docker exec","Q_Score":0,"Tags":"python,docker","A_Id":55941056,"CreationDate":"2019-05-01T17:27:00.000","Title":"Development environment for python scripts using docker","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have an Airflow DAG which creates an EMR cluster, then runs SSHOperator tasks on that cluster. Right now, I am hard coding the Master public DNS for the EMR cluster into an Airflow SSH connection. Is there a way for my DAG to dynamically populate this DNS when the EMR cluster is created so I don't have to manually update the connection?","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":822,"Q_Id":55956160,"Users Score":2,"Answer":"After a bit more digging into the Airflow CLI I found it is possible to create\/ delete new connections. I've added a bash operator after building the EMR cluster to add an Airflow connection. \nairflow connections --delete --conn_id aws_emr\nairflow connections --add --conn_id aws_emr --conn_type SSH --conn_host publicDNS --conn_login username --conn_extra {\"key_file\":\"file.pem\"}","Q_Score":2,"Tags":"python,airflow","A_Id":55956774,"CreationDate":"2019-05-02T15:55:00.000","Title":"Dynamic Airflow EMR Connection","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am creating an Azure function (python) that reads pickle file from Azure Blob Storage. I am using BlockBlobService for this purpose and its working fine in Spyder. However, when i tried to implement same approach in Azure function, its not working. What could be the reasons for this issue? Is it so because BlockBlobService is not available in Azure functions (python preview)? What could be the alternatives to it?","AnswerCount":2,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":430,"Q_Id":55965641,"Users Score":1,"Answer":"Did you include a 'requirements.txt' file? You can run this code in the directory before deploying to Azure: \npip freeze >> requirements.txt","Q_Score":0,"Tags":"python,azure,azure-functions,azure-blob-storage","A_Id":56048388,"CreationDate":"2019-05-03T08:05:00.000","Title":"Is it possible to use BlockBlobService in Azure Functions (python)?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm new to kubernetes and I'm setting up some test environments to do some experiments with in minikube. So I have two pods running python, connected trough a service (I verified that they are selected trough the same service). \nI want to open a socket connection between the two. The container ip is equal to the IP specified in the service. On Pod1 I create the socket and connect to localhost and the port belonging to the container. \nI'm not sure whether I should actually connect to localhost or the name of the service. Then on the other pod (Pod2) I connect to the name of the service (if I understand correctly the service should exposes the IP with the name that corresponds to the service name). \nPod2 refuses to connect to Pod1 in the aforementioned configuration. \nIf I let Pod1 create a socket with as IP address the service name I get the \"Cannot assign requested address\" on socket creation.\nSo I think I'm just choosing the IP address wrongly.\nThanks in advance","AnswerCount":3,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":1269,"Q_Id":55977340,"Users Score":0,"Answer":"In Kubernetes, it is difficult to have always the IP address of a given POD. A pretty solution consists in making your application binding to 0.0.0.0 (this means you application will listen on all local interfaces including the Pod primary interface).\nThen you can expose you application running in that Pod using a Kubernetes service.","Q_Score":0,"Tags":"python,docker,sockets,kubernetes","A_Id":67442922,"CreationDate":"2019-05-03T21:32:00.000","Title":"What IP to bind to python socket in Kubernetes?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a Python daemon that monitors machine performance during the execution of another software. It basically retrieves data of target processes with ps and writes it to a CSV file to be plotted when the daemon is stopped.\nIf the daemon is running in a terminal as a foreground process, the user can stop it with Ctrl+C, what will force a KeyboardInterrupt exception. I capture that exception and plot the content of the CSVs then.\nThe problem comes when I have to launch the daemon in a background process with nohup myDaemon.py &. It works fine, as it generates the CSVs, but as I can't force a KeyboardInterrupt exception the CSVs are not automatically plotted if I kill or stop the background process with other methods than Ctrl+C.\nWhat I want to avoid is having to move the plotting part to a separate script and run it manually after stopping the daemon.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":540,"Q_Id":56036985,"Users Score":1,"Answer":"Found the answer reading kill man page. It turns out that signal -2 (SIGINT) is the equivalent of Ctrl+C. Tested it running kill -2 <Background_Daemon_PID> and worked just fine.","Q_Score":0,"Tags":"python-2.7,background-process,daemon,keyboardinterrupt","A_Id":56041220,"CreationDate":"2019-05-08T08:55:00.000","Title":"How to interrupt Python background daemon with Ctrl+C equivalent (forcing KeyboardInterrupt exception)","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm brand new to Python, so excuse my ignorance. I also checked the other questions with this same error, but they all regarded the escape sequence \"\\n\". When attempting to run a python file from my Documents in the Python command line, I get the error \"unexpected character after line continuation character.\"\nI've tried reading straight from W3Schools, which says to use...\nC:\\Users\\Your Name>python helloworld.py\nSince my file is in Documents in a file called test, I tried...\nC:\\Users\\Chris\\Documents\\Python>python test.py\nHowever, I received the given error. Any help would be appreciated, thanks.\nEdit\nIn the OS command prompt, the py prefix should have been used, rather than python","AnswerCount":1,"Available Count":1,"Score":-0.1973753202,"is_accepted":false,"ViewCount":260,"Q_Id":56043464,"Users Score":-1,"Answer":"Type python test.py into the shell directly, not into the python interpreter. The C:\\Users\\Chris\\Documents\\Python> has backslashes in it, which cause this error as they make python expect the line to end.","Q_Score":0,"Tags":"python","A_Id":56043525,"CreationDate":"2019-05-08T14:49:00.000","Title":"\"Unexpected character after line continuation character\" when running .py file?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Just like the title says, I would like to turn on my raspberry pi and have it automatically open a terminal and that terminal would automatically start a python script. Preferably in a way where I can run 4 different terminals each running a different .py file.\nI have done the rc.local approach but the programs do not open in a terminal and that is essential for the functionality of the code. \nAny suggestions?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":149,"Q_Id":56048691,"Users Score":0,"Answer":"Edit the file found here:\n\/etc\/xdg\/lxsession\/LXDE\/autostart\nadd your commands to it\n@python PathToScript\/script.py\nEdit: I realize you want the terminal open. I believe this will work\n@lxterminal --command \"python pathToScript\/script.py\"","Q_Score":0,"Tags":"python,linux,raspberry-pi","A_Id":56048758,"CreationDate":"2019-05-08T20:37:00.000","Title":"How can I open a terminal and run a program in it automatically on my raspberry pi?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I don't quite understand how this works, and I've been searching everywhere but didn't quite find the answer. \nSo when I deploy a django app on heroku the other day I was using daphne with this in the Procfile : \ndaphne app.asgi:application --port $PORT --bind 0.0.0.0 -v2\nThe app works just fine and it make sense (I heard that heroku dynamically assigns the port). But how does the following code knows how to bind it's port, isn't it always 8000 by default ?\n\ngunicorn app.asgi\n\nSorry for the silly question. I'm a newbie in devops stuff","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":83,"Q_Id":56055124,"Users Score":0,"Answer":"No, the port is whatever Heroku wants it to be. Since they're running many many sites, they need to dynamically choose a port to serve each one on. They provide that port in the PORT environment variable, and the Procfile takes that value and binds gunicorn to it.","Q_Score":0,"Tags":"python,django,heroku,gunicorn","A_Id":56055931,"CreationDate":"2019-05-09T08:22:00.000","Title":"What is gunicorn app.wsgi actually doing in heroku?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"In my CTF environment, if I want to access an application in a server, I have to perform SSH. Here's what it looks like:\n\n(my terminal) ssh username@ssh_ip\nenter password\n\nThe steps start to annoy me because if I have to access the same application more than once, I have to perform these steps multiple times.\nThus, I want to create a script that does this automatically, like '.\/run_everything', which will autorun everything and immediately brings me to the application CLI instantly.\nWhat kind of python library that can do this? I'm not asking for someone to make it for me, but more like asking for advice like what libraries to use and stuff.","AnswerCount":4,"Available Count":1,"Score":0.049958375,"is_accepted":false,"ViewCount":251,"Q_Id":56086866,"Users Score":1,"Answer":"Try python api of iTerm2 or use some packages like paramiko.","Q_Score":1,"Tags":"python,python-3.x","A_Id":56087036,"CreationDate":"2019-05-11T03:12:00.000","Title":"Script for SSH OverTheWire","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I just ran autopep8 in vscode, system reports two errors:\n\nError: Command failed: autopep8 c:\\Users\\Administrator\\Desktop\\Python\\\u4ece\u5165\u95e8\u5230\u5b9e\u8df5\\have a try\\5-10.py usage: autopep8 [-h] [--version] [-v] [-d] [-i] [--global-config filename] [--ignore-local-config] [-r] [-j n] [-p n] [-a] [--experimental] [--exclude globs] [--list-fixes] [--ignore errors] [--select errors] [--max-line-length n] [--line-range line line] [--hang-closing] [--exit-code] [files [files ...]] autopep8: error: autopep8 only takes one filename as argument unless the \"--in-place\" or \"--diff\" args are used\n\nand\n\nusage: autopep8 [-h] [--version] [-v] [-d] [-i] [--global-config filename] [--ignore-local-config] [-r] [-j n] [-p n] [-a] [--experimental] [--exclude globs] [--list-fixes] [--ignore errors] [--select errors] [--max-line-length n] [--line-range line line] [--hang-closing] [--exit-code] [files [files ...]] autopep8: error: autopep8 only takes one filename as argument unless the \"--in-place\" or \"--diff\" args are used\n\nAnyone knows why? I try my best but also don't know what I should do.\nI am using:\n\nExtension:Python-autopep8\nvscode:1.33.1","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":2564,"Q_Id":56124204,"Users Score":0,"Answer":"Your file path contains a space in it \"have a try\". This is interpreted as multiple file names.\nTo resolve this, I just ensured that the file path does not contain any spaces.","Q_Score":1,"Tags":"python,visual-studio-code,autopep8","A_Id":66697783,"CreationDate":"2019-05-14T06:27:00.000","Title":"vscode autopep8 don't run","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have two computers (running Ubuntu) that have access to one server. The shared home directory of the two computers is on the server.\nOn computer (A) python 3.5 is installed, on computer (B) python 3.7 is installed. I created a virtualenv from computer (B) on the shared home directory (using python 3.7).\nNow although it is possible to activate that virtualenv from computer (A) it does not use the \"virtualenv-python 3.7\" but the system's python 3.5. So technically the virtualenv is activated but effectively it is not.\nNote that the VIRTUAL_ENV path is set correctly.\nI thought that virtualenv-folder is a fully enclosed environment, not even needing any python installed on the system. So why is it not working?","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":130,"Q_Id":56124388,"Users Score":1,"Answer":"A virtualenv doesn't have a full Python installation. Instead, it links to an installation present on the system (FYI that link is in <env>\/lib\/orig-prefix.txt). The env's directory tree has some stubs and special logic but it uses the bulk from that installation.\nSo if you run activate on a system that doesn't have the same Python at the same path as the one virtualenv was created for, that script won't work correctly. It might happen to hook to something else present at the same path but this is not a supported scenario so all bets are off.\n\nIf you need a \"fully enclosed environment\", you may want to take a look at pyenv which does exactly that -- installs a full Python under your home dir. (Or you can just install Python from source to somewhere under your home dir -- but pyenv makes it easy to switch to that installation and back.)","Q_Score":0,"Tags":"python,virtualenv","A_Id":56124867,"CreationDate":"2019-05-14T06:42:00.000","Title":"Activate virtualenv from a system running a different python version","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am running a gstreamer command to play mp3 from terminal with The following command:\ngst-launch-1.0 -v filesrc location=\/home\/user\/songs\/song.mp3 ! mad ! audioconvert ! audioresample ! autoaudiosink\nI am getting the error below and the mp3 is not playing\nWARNING: erroneous pipeline: no element \"mad\"\nI have installed gstreamer plugins already with command below:\nsudo apt-get install gstreamer1.0-plugins-good gstreamer1.0-plugins-bad gstreamer1.0-plugins-ugly gstreamer1.0-libav\nThey are installed successfully but the error remains.\nAlso I have checked whether mad plugin has been blacklisted using\ngst-inspect-1.0 and its not blacklisted.\nI have cleared ~\/.cache\/gstreamer-1.0\/registry.*.bin.\nThe command below is failing in ubuntu 18.04\ngst-launch-1.0 -v filesrc location=\/home\/user\/songs\/song.mp3 ! mad ! audioconvert ! audioresample ! autoaudiosink\nThe command below works but I want to use \"mad: but not \"decodebin\":\ngst-launch-1.0 -v filesrc location=\/home\/user\/songs\/song.mp3 ! decodebin ! audioconvert ! audioresample ! autoaudiosink","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":1942,"Q_Id":56132573,"Users Score":2,"Answer":"From the GStreamer's 1.12 Changelog on plugins removal:\n\nThe mad mp1\/mp2\/mp3 decoder plugin was removed from gst-plugins-ugly, as libmad is GPL licensed, has been unmaintained for a very long time, and there are better alternatives available. Use the mpg123audiodec element from the mpg123 plugin in gst-plugins-ugly instead, or avdec_mp3 from the gst-libav module which wraps the ffmpeg library. We expect that we will be able to move mp3 decoding to gst-plugins-good in the next cycle seeing that most patents around mp3 have expired recently or are about to expire.","Q_Score":1,"Tags":"python,c,gstreamer","A_Id":56138982,"CreationDate":"2019-05-14T14:17:00.000","Title":"How to fix `WARNING: erroneous pipeline: no element \"mad\"`","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"While running test cases built in the Robot Framework, at some point, the error \u201cPython stopped\u201d appears and I have observed that numerous chrome processes linger per Task Manager even when my test case closes all browser and performs a taskkill command.  As a result, my testing is suspended with aborting the only option.\nBackground and tech stack:\n\nwindows 7\/Windows 10\nPython 2.7.15\/RobotFramework\n\"scoped_dir*\" directories fill up the disk space\nChrome v74\/chromedriver v74\nChrome setting turned off:\n    Continue running background apps when Google Chrome is closed\nCommand line taskkill does not always work so only option is to end chrome process in Task Manager.\n\nTest Setup      Run | taskkill \/f \/t \/im chrome.exe\nTest Teardown   Run | taskkill \/f \/t \/im chrome.exe\nOpen Browser\n......\nClose Browser\nExpected result:  chrome process stops running after each test case is executed and all C:\\Users\\<user_name>\\AppData\\Local\\Temp\\scoped_dirXXXXX directories are deleted.\nActual result: \"Python stopped\" is displayed; more often than not, numerous chrome processes linger and scoped_dir* fills up the file system.","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":400,"Q_Id":56138502,"Users Score":0,"Answer":"I have already tried the taskkill command on chromedriver.exe and that does not work.\nI have increased the RAM on the computer and that does not work.\nI am running smaller suites of tests and that is working now.","Q_Score":0,"Tags":"python,robotframework","A_Id":56242134,"CreationDate":"2019-05-14T20:58:00.000","Title":"Python stops and chrome processes linger","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"While running test cases built in the Robot Framework, at some point, the error \u201cPython stopped\u201d appears and I have observed that numerous chrome processes linger per Task Manager even when my test case closes all browser and performs a taskkill command.  As a result, my testing is suspended with aborting the only option.\nBackground and tech stack:\n\nwindows 7\/Windows 10\nPython 2.7.15\/RobotFramework\n\"scoped_dir*\" directories fill up the disk space\nChrome v74\/chromedriver v74\nChrome setting turned off:\n    Continue running background apps when Google Chrome is closed\nCommand line taskkill does not always work so only option is to end chrome process in Task Manager.\n\nTest Setup      Run | taskkill \/f \/t \/im chrome.exe\nTest Teardown   Run | taskkill \/f \/t \/im chrome.exe\nOpen Browser\n......\nClose Browser\nExpected result:  chrome process stops running after each test case is executed and all C:\\Users\\<user_name>\\AppData\\Local\\Temp\\scoped_dirXXXXX directories are deleted.\nActual result: \"Python stopped\" is displayed; more often than not, numerous chrome processes linger and scoped_dir* fills up the file system.","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":400,"Q_Id":56138502,"Users Score":0,"Answer":"Try killing the \"Chromedriver.exe\" as Robot framework uses chromedriver to interact with the chrome browser with the help of functions defined in back-end(Selenium library).\nTry below Command in Test Setup\ntaskkill \/f \/t \/im chromedriver.exe","Q_Score":0,"Tags":"python,robotframework","A_Id":56145675,"CreationDate":"2019-05-14T20:58:00.000","Title":"Python stops and chrome processes linger","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I have successfully implemented google assistant on rpi using gassistpi and added agent on dialogflow also. The issue is that if multiple users invoke google assistant on different raspberry pi I am not able to identify which user has invoked the action as request from webhook on dialogflow doesn't have any user identity information. Thus, I am facing issues while retrieving data for particular user.\nI tried using account linking on actions on google using google signup over voice but I am unable to implement that.","AnswerCount":2,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":174,"Q_Id":56150206,"Users Score":1,"Answer":"The Google Assistant SDK does not have voice match as a feature, so you would be unable to use it to identify individual users of the Action on that surface.","Q_Score":0,"Tags":"python-3.x,dialogflow-es,actions-on-google,google-assistant-sdk","A_Id":56153506,"CreationDate":"2019-05-15T13:09:00.000","Title":"check identity of multiple users on actions on google","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"In airflow, the \"Gantt\" chart offers quite a good view on performance of the ran tasks. It offers stats like start\/end time, duration and etc.\nDo you guys know a way to programmatically pull these stats via the Airflow API? I would like to use these stats and generate periodic reports on the performance of my tasks and how it changes over time.\nMy airflow version is: 1.9\nPython: 3.6.3\nRunning on top of docker\nThanks!\nKelvin\nAirflow online documentation","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":1250,"Q_Id":56156636,"Users Score":2,"Answer":"One easy approach could be to set up a SQL alchemy connection, airflow stores\/sends all the data in there once the configuration is completed(dag info\/stat\/fail, task info\/stats\/ etc.).\nEdit airflow.cfg and add:\nsql_alchemy_conn = mysql:\/\/------\/table_name","Q_Score":1,"Tags":"python-3.x,airflow","A_Id":56157305,"CreationDate":"2019-05-15T19:48:00.000","Title":"Pulling duration stats API in Airflow","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am using Eclipse on Linux to develop C applications, and the build system I have makes use of make and python. I have a custom virtualenv installed and managed by pyenv, and it works fine from the command line if I pre-select the virtualenv with, say pyenv shell myvenv.\nHowever I want Eclipse to make use of this virtualenv when building (via \"existing makefile\") from within Eclipse. Currently it runs my Makefile but uses the system python in \/usr\/bin\/python, which is missing all of the packages needed by the build system.\nIt isn't clear to me how to configure Eclipse to use a custom Python interpreter such as the one in my virtualenv. I have heard talk of setting PYTHONPATH however this seems to be for finding site-packages rather than the interpreter itself. My virtualenv is based on python 3.7 and my system python is 2.7, so setting this alone probably isn't going to work.\nI am not using PyDev (this is a C project, not a Python project) so there's no explicit support for Python in Eclipse. I'd prefer not to install PyDev if I can help it.\nI've noticed that pyenv adds its plugins, shims and bin directories to PATH when activated. I could explicitly add these to PATH in Eclipse, so that Eclipse uses pyenv to find an interpreter. However I'd prefer to point directly at a specific virtualenv rather than use the pyenv machinery to find the current virtualenv.","AnswerCount":3,"Available Count":3,"Score":0.0,"is_accepted":false,"ViewCount":930,"Q_Id":56159051,"Users Score":0,"Answer":"I had the same trouble and after some digging, there are two solutions; project-wide and workspace-wide. I prefer the project-wide as it will be saved in the git repository and the next person doesn't have to pull their hair.\nFor the project-wide add \/Users\/${USER}\/.pyenv\/shims: to the start of the \"Project properties > C\/C++ Build > Environment > PATH\".\nI couldn't figure out the other method fully (mostly because I'm happy with the other one) but it should be with possible to modify \"Eclipse preferences > C\/C++ > Build > Environment\". You should change the radio button and add PATH variable.","Q_Score":2,"Tags":"python,eclipse,makefile,virtualenv,pyenv","A_Id":61663567,"CreationDate":"2019-05-15T23:51:00.000","Title":"How to use a Pyenv virtualenv from within Eclipse?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am using Eclipse on Linux to develop C applications, and the build system I have makes use of make and python. I have a custom virtualenv installed and managed by pyenv, and it works fine from the command line if I pre-select the virtualenv with, say pyenv shell myvenv.\nHowever I want Eclipse to make use of this virtualenv when building (via \"existing makefile\") from within Eclipse. Currently it runs my Makefile but uses the system python in \/usr\/bin\/python, which is missing all of the packages needed by the build system.\nIt isn't clear to me how to configure Eclipse to use a custom Python interpreter such as the one in my virtualenv. I have heard talk of setting PYTHONPATH however this seems to be for finding site-packages rather than the interpreter itself. My virtualenv is based on python 3.7 and my system python is 2.7, so setting this alone probably isn't going to work.\nI am not using PyDev (this is a C project, not a Python project) so there's no explicit support for Python in Eclipse. I'd prefer not to install PyDev if I can help it.\nI've noticed that pyenv adds its plugins, shims and bin directories to PATH when activated. I could explicitly add these to PATH in Eclipse, so that Eclipse uses pyenv to find an interpreter. However I'd prefer to point directly at a specific virtualenv rather than use the pyenv machinery to find the current virtualenv.","AnswerCount":3,"Available Count":3,"Score":-0.0665680765,"is_accepted":false,"ViewCount":930,"Q_Id":56159051,"Users Score":-1,"Answer":"Typing CMD+SHIFT+. will show you dotfiles & directories that begin with dot in any Mac finder dialog box...","Q_Score":2,"Tags":"python,eclipse,makefile,virtualenv,pyenv","A_Id":59180632,"CreationDate":"2019-05-15T23:51:00.000","Title":"How to use a Pyenv virtualenv from within Eclipse?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am using Eclipse on Linux to develop C applications, and the build system I have makes use of make and python. I have a custom virtualenv installed and managed by pyenv, and it works fine from the command line if I pre-select the virtualenv with, say pyenv shell myvenv.\nHowever I want Eclipse to make use of this virtualenv when building (via \"existing makefile\") from within Eclipse. Currently it runs my Makefile but uses the system python in \/usr\/bin\/python, which is missing all of the packages needed by the build system.\nIt isn't clear to me how to configure Eclipse to use a custom Python interpreter such as the one in my virtualenv. I have heard talk of setting PYTHONPATH however this seems to be for finding site-packages rather than the interpreter itself. My virtualenv is based on python 3.7 and my system python is 2.7, so setting this alone probably isn't going to work.\nI am not using PyDev (this is a C project, not a Python project) so there's no explicit support for Python in Eclipse. I'd prefer not to install PyDev if I can help it.\nI've noticed that pyenv adds its plugins, shims and bin directories to PATH when activated. I could explicitly add these to PATH in Eclipse, so that Eclipse uses pyenv to find an interpreter. However I'd prefer to point directly at a specific virtualenv rather than use the pyenv machinery to find the current virtualenv.","AnswerCount":3,"Available Count":3,"Score":-0.0665680765,"is_accepted":false,"ViewCount":930,"Q_Id":56159051,"Users Score":-1,"Answer":"For me, following steps worked ( mac os 10.12, eclipse photon version, with pydev plugin)\n\nProject -> properties\nPydev-Interpreter\/Grammar \nClick here to configure an interpreter not listed (under interpret combobox)\nopen interpreter preference page \nBrowse for python\/pypy exe -> my virtualenvdirectory\/bin\/python\nThen the chosen python interpreter path should show ( for me still, it was not pointing to my virtual env, but I typed my path explicitly here and it worked)\n\nIn the bottom libraries section, you should be able to see the site-packages from your virtual env\nExtra tip - In my mac os the virtual env was starting with .pyenv, since it's a hidden directory, I was not able to select this directory and I did not know how to view the hidden directory in eclipse  file explorer. Therefore I created an softlink ( without any . in the name) to the hidden directory (.pyenv) and then I was able to select the softlink","Q_Score":2,"Tags":"python,eclipse,makefile,virtualenv,pyenv","A_Id":57618150,"CreationDate":"2019-05-15T23:51:00.000","Title":"How to use a Pyenv virtualenv from within Eclipse?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I've looked through many similar questions, but no one seems to have had this same problem.  I can open the IDLE shell perfectly fine from the start menu.  Once in, I can use File->Open to open any .py file.\nHowever, my problem is that if I try to open any .py file from File Explorer with IDLE, the files will run, but the IDLE application won't come up.  This especially makes it difficult to quit running when I can't even close the application if it's not open.  It also makes it very tedious if I have to always use File->Open from the IDLE shell if I want to open a .py file.  How can I at least get the Edit with IDLE option to come back?","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":2365,"Q_Id":56159225,"Users Score":0,"Answer":"When you open the file from within IDLE, you open it in an edit window. If you try to open it from the file explorer, it will RUN it on IDLE. So that's why you can't just \"open it\" from the explorer.\nI suggest that you start using some other tools to code in python. Sublime Text and Atom are great text editors, and both can be used as a python IDE.","Q_Score":1,"Tags":"python,python-idle","A_Id":56159386,"CreationDate":"2019-05-16T00:21:00.000","Title":"Python IDLE won't open with .py file, only from start menu","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I've looked through many similar questions, but no one seems to have had this same problem.  I can open the IDLE shell perfectly fine from the start menu.  Once in, I can use File->Open to open any .py file.\nHowever, my problem is that if I try to open any .py file from File Explorer with IDLE, the files will run, but the IDLE application won't come up.  This especially makes it difficult to quit running when I can't even close the application if it's not open.  It also makes it very tedious if I have to always use File->Open from the IDLE shell if I want to open a .py file.  How can I at least get the Edit with IDLE option to come back?","AnswerCount":2,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":2365,"Q_Id":56159225,"Users Score":1,"Answer":"I had this same issue and came looking for an answer, but ended up figuring it out:\nI had the issue when I downloaded the 64-bit version for windows (3.9.7), but the issue was resolved when I instead installed the 32-bit version of 3.9.7.\nNow I can right-click > \"Edit with IDLE\"","Q_Score":1,"Tags":"python,python-idle","A_Id":70718673,"CreationDate":"2019-05-16T00:21:00.000","Title":"Python IDLE won't open with .py file, only from start menu","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"When I run my Qt application I get the message \n\nQt WebEngine seems to be initialized from a plugin. Please set\n  Qt::AA_ShareOpenGLContexts using QCoreApplication::setAttribute before\n  constructing QGuiApplication.\n\nThe app runs fine regardless of the fact that this is getting dumped to the terminal. I cant seem to find the root cause or really understand what this message is trying to tell me. What is this message saying and how can I fix it?","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":7357,"Q_Id":56159475,"Users Score":0,"Answer":"Using PySide6 instead of PySide2 solved my problem with python 3.9 and QT 5.15 if it can help","Q_Score":9,"Tags":"python,pyside2,qtwebengine","A_Id":67457543,"CreationDate":"2019-05-16T01:06:00.000","Title":"Qt WebEngine seems to be initialized","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":1,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I have a fixed number of partitions of a topic. Producers produce data at varying rate in different hours of the day. \nI want to add consumers dynamically based on hours of the day for the processing so that I can process records as fast as I can.\nFor example I have 10 partitions of a topic. I want to deploy 5 consumers for non peak hours and 20 consumers for peak hours.\nMy problem is that when I will have 20 consumers, each consumer will be receiving duplicate records, which I want to avoid. I want to process unique records only to speed-up records processing.\nIs there any mechanism to do this?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":210,"Q_Id":56174516,"Users Score":0,"Answer":"If you have N partitions, then you can have up to N consumers within the same consumer group each of which reading from a single partition. When you have less consumers than partitions, then some of the consumers will read from more than one partition. Also, if you have more consumers than partitions then some of the consumers will be inactive and will receive no messages at all.\nTherefore, if you want to kick off 20 consumers, you need to increase the number of partitions of the topic to -at least- 20 otherwise, 10 of your consumers will be inactive. \nWith regards to the duplicates that you've mentioned, if all of your consumers belong to the same group, then each message will be consumed only once. \nTo summarise, \n\nIncrease the number of partitions of your topic to 20.\nCreate the mechanism that will be creating and killing consumers based on peak\/off-peak hours and make sure that when you kick of a consumer, it belongs to the existing consumer group so that the messages are consumed only once.","Q_Score":1,"Tags":"java,python,apache-kafka,kafka-consumer-api","A_Id":56175288,"CreationDate":"2019-05-16T18:21:00.000","Title":"How to scale Kafka stream processing dynamically?","Data Science and Machine Learning":1,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a node.js server running on a Raspberry Pi 3 B+. (I'm using node because I need the capabilities of a bluetooth library that works well). \nOnce the node server picks up a message from a bluetooth device, I want it to fire off an event\/command\/call to a different python script running on the same device.\nWhat is the best way to do this? I've looked into spawning child processes and running the script in them, but that seems messy... Additionally, should I set up a socket between them and stream data through it? I imagine this is done often, what is the consensus solution?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":149,"Q_Id":56178165,"Users Score":1,"Answer":"Running a child process is how you would run a python script. That's how you do it from nodejs or any other program (besides a python program).\nThere are dozens of options for communicating between the python script and the nodejs program. The simplest would be stdin\/stdout which are automatically set up for you when you create the child process, but you could also give the nodejs app a local http server that the python script could communicate with or vice versa. \nOr, set up a regular socket between the two. \nIf, as you now indicate in a comment, your python script is already running, then you may want to use a local http server in the nodejs app and the python script can just send an http request to that local http server whenever it has some data it wants to pass to the nodejs app.  Or, if you primarily want data to flow the opposite direction, you can put the http server in the python app and have the nodejs server send data to the python app.\nIf you want good bidirectional capabilities, then you could also set up a socket.io connection between the two and then you can easily send messages either way at any time.","Q_Score":0,"Tags":"python,node.js,raspberry-pi","A_Id":56192507,"CreationDate":"2019-05-17T00:38:00.000","Title":"Get nodejs server to trigger a python script","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I'm trying to run images in python, which means I have to install pillow (since PIL is apparently outdated).(I'm running them in atom, so if this changes something in the process, please let me know).\nI've installed xCode and homebrew, and pip appears to be downloaded, but sudo pip install pillow returns -bash: pip: command not found and sudo -pip install pillow then asks me for an ip, which I assume is ip address. When I put in my IP,  however, it tells me \"Sorry, try again.\" I've tried installing it from homebrew by using brew install brewsci\/science\/pillow, which causes this: Error: No previously deleted formula found. Error: No similarly named formulae found.","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":793,"Q_Id":56179148,"Users Score":0,"Answer":"you try to run the following command to see Help:\n$ sudo easy_install pip\n$ sudo pip install --upgrade pip\n$ sudo pip install pillow","Q_Score":0,"Tags":"python,macos,python-imaging-library,atom-editor","A_Id":56179273,"CreationDate":"2019-05-17T03:23:00.000","Title":"How to install pillow (PIL) on mac OS 10.14.4?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"How do I redirect the output of python version into a text file in linux? \nI tried the following:\npython --version > old.txt\nThe text file is getting created but it is empty.\nSimple question, but beginner here.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":109,"Q_Id":56195033,"Users Score":4,"Answer":"The Python version is output to stderr rather than stdout which is what your command is writing to the file. In order to write the contents of stderr you will want to write:\npython --version 2> old.txt","Q_Score":1,"Tags":"python,linux,centos","A_Id":56195038,"CreationDate":"2019-05-18T00:31:00.000","Title":"Redirecting python version output","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have an airflow DAG that has over 100,000 tasks.\nI am able to run only up to 1000 tasks. Beyond that the scheduler hangs, the webserver cannot render tasks and is extremely slow on the UI.\nI have tried increasing, min_file_process_interval and processor_poll_interval config params.\nI have set num_duration to 3600 so that scheduler restarts every hour.\nAny limits I'm hitting on the webserver or scheduler? In general, how to deal with a large number of tasks in Airflow? Any config settings, etc would be very helpful.\nAlso, should I be using SubDagOperator at this scale or not? please advice.\nThanks,","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":1319,"Q_Id":56203824,"Users Score":0,"Answer":"I was able to run more than 165,000 airflow tasks!\nBut there's a catch. Not all the tasks were scheduled and rendered in a single Airflow Dag.\nThe problems I faced when I tried to schedule more and more tasks are that of scheduler and webserver.\nThe memory and cpu consumption on scheduler and webserver dramatically increased as more and more tasks were being scheduled (it is obvious and makes sense). It went to a point where the node couldn't handle it anymore (scheduler was using over 80GB memory for 16,000+ tasks)\nI split the single dag into 2 dags. One is a leader\/master. The second one being the worker dag.\nI have an airflow variable that says how many tasks to process at once (for example, num_tasks=10,000). Since I have over 165,000 tasks, the worker dag will process 10k tasks at a time in 17 batches.\nThe leader dag, all it does is trigger the same worker dag over and over with different sets of 10k tasks and monitor the worker dag run status. The first trigger operator triggers the worker dag for the first set of 10k tasks and keeps waiting until the worker dag completes. Once it's complete, it triggers the same worker dag with the next batch of 10k tasks and so on.\nThis way, the worker dag keeps being reused and never have to schedule more than X num_tasks\nThe bottom line is, figure out the max_number of tasks your Airflow setup can handle. And then launch the dags in leader\/worker fashion for max_tasks over and over again until all the tasks are done.\nHope this was helpful.","Q_Score":4,"Tags":"python,python-3.x,airflow,airflow-scheduler","A_Id":62958902,"CreationDate":"2019-05-19T00:17:00.000","Title":"How to run Airflow dag with more than 100 thousand tasks?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Is it possible to use os.popen() to achieve a result similar to os.system? I know that os.popen() is more secure, but I want to know how to be able to actually run the commands through this function. When using os.system(), things can get very insecure and I want to be able to have a secure way of accessing terminal commands.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":495,"Q_Id":56212056,"Users Score":3,"Answer":"Anything that uses the shell to execute commands is insecure for obvious reasons (you don't want someone running rm -rf \/ in your shell :). Both os.system and os.popen use the shell.\nFor security, use the subprocess module with shell = False\nEither way, both of those functions have been deprecated since Python 2.6","Q_Score":1,"Tags":"python,popen,python-os","A_Id":56212206,"CreationDate":"2019-05-19T21:14:00.000","Title":"Replace os.system with os.popen for security purposes","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"If you are using anaconda, then you probably noticed that when installing python packages, it took away the disks in C drive even if you installed anaconda in D drive. (I have tried the clean ect. of conda commands, it's not the cashes or other things but rather useful files.) \nThis was especially obvious when I was trying to install different versions of tensorflow and Keras packages. It took away almost 20 GBs of disks from my laptop.\nMy question was how to avoid such issue and make sure anaconda was only using the disks in, i.e. D drive?(in windows environment )","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":1072,"Q_Id":56228764,"Users Score":1,"Answer":"try changing the paths of the environment variables","Q_Score":3,"Tags":"python,windows,installation,package,anaconda","A_Id":56228904,"CreationDate":"2019-05-20T22:05:00.000","Title":"How to avoid anaconda from installing files\/packages in C drive?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a shell script that runs some java program on a remote server. \nBut this shell script is to be executed by a python script which is on my local machine.\nHere's the flow : Python script executes the shell script (with paramiko), the shell script then executes a java class. \nI am getting an error : 'The java class could not be loaded. java.lang.UnsupportedClassVersionError:  (Unsupported major.minor version 50.0)' whenever I run python code.\nLimitations: I cannot make any changes to the shell script.\nI believe this is java version issue. But I don't know how to explicitly have a python program to run in a specific java environment.\nPlease suggest how I can get rid of this error.\nThe java version of unix machine (where shell script executes) : 1.6.0\nJava version of my local machine (where python script executes): 1.7.0","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":49,"Q_Id":56232838,"Users Score":1,"Answer":"The shell script can stay the same, update java on the remote system to java 1.7 or later. Then it should work.\nAnother possibility could be to compile the java application for java 1.6 instead. The java compiler (javac) has the arguments -source and -target and adding -source 1.6 -target 1.6 when compiling the application should solve this issue, too (but limits the application to use java 1.6 features).\nAlso be aware: If you use a build system like gradle or maven, then you have a different way to set source and target version.","Q_Score":0,"Tags":"java,python-3.x,sh","A_Id":56232988,"CreationDate":"2019-05-21T07:05:00.000","Title":"Unsupported major.minor version when running a java program from shell script which is executed by a python program","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I had so many Python installations that it was getting frustrating, so I decided to do a full reinstall. I removed the \/Library\/Frameworks\/Python.Frameworks\/ folder, and meant to remove the \/usr\/local\/bin\/python folder too, but I accidentally removed the \/usr\/bin\/python instead. I don't see any difference, everything seems to be working fine for now, but I've read multiple articles online saying that I should never touch \/usr\/bin\/python as OS X uses it and things will break.\nI tried Time Machine but there are no viable recovery options. How can I manually \"restore\" what was deleted? Do I even need to, since everything seems to be working fine for now? I haven't restarted the Mac yet, in fear that things might break.\nI believe the exact command I ran was rm -rf \/usr\/bin\/python*, and I don't have anything python related in my \/usr\/bin\/ folder.\nI'm running on macOS Mojave 10.14.5","AnswerCount":2,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":1220,"Q_Id":56233672,"Users Score":1,"Answer":"Items can't be recovered when you perform rm -rf. However, you can try the following:\ncp \/usr\/local\/bin\/python* \/usr\/bin \nThis would copy user local python to usr bin and most probably will bail you out.\nDon't worry, nothing will happen to your OS. It should work fine :)","Q_Score":0,"Tags":"python,macos,terminal","A_Id":56233846,"CreationDate":"2019-05-21T07:54:00.000","Title":"Accidentally deleted \/usr\/bin\/python instead of \/usr\/local\/bin\/python on OS X\/macOS, how to restore?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have installed anaocnda but I am not able to find navigator. I also tried using prompt to run jupyter notebook but the command could't run. Does it have something to do with the path? \nBelow is the message that I get every time I try to run a command\n\nC:\\Users\\vikas\\Anaconda3\\Scripts\\activate.bat' is not recognized as an internal or external command,\n  operable program or batch file.\nC:\\Users\\vikas>jupyter notebook\n  Error executing Jupyter command 'notebook': [Errno 'jupyter-notebook' not found] 2\nC:\\Users\\vikas>python\n  'python' is not recognized as an internal or external command,\n  operable program or batch file.\nC:\\Users\\vikas>spyder\n  'spyder' is not recognized as an internal or external command,\n  operable program or batch file.\nC:\\Users\\vikas>","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":2356,"Q_Id":56249798,"Users Score":0,"Answer":"You should type 'anaconda-navigator'. That will kick off aaconda-navigator. This is installed in the bin directory under anaconda3. There is also an Anaconda-Navigator.app in the Applications folder.","Q_Score":1,"Tags":"python,anaconda,spyder,prompt","A_Id":56264288,"CreationDate":"2019-05-22T05:23:00.000","Title":"I am not able to find anaconda navigator after installing","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm writing a cloud function that basically iterates over all our DataProc clusters and alerts us when they don't have a scheduled deletion policy. As I understand it this can be viewed in the CLI with gcloud beta dataproc clusters list but I am struggling to find a Python equivalent.\nHas anyone done something similar in the past and can point me in the right direction?","AnswerCount":1,"Available Count":1,"Score":0.3799489623,"is_accepted":false,"ViewCount":51,"Q_Id":56257513,"Users Score":2,"Answer":"I seem to have found the answer myself, it's in the config if you import dataproc_v1beta2 instead of dataproc_v1","Q_Score":1,"Tags":"python,google-cloud-platform,google-cloud-functions,google-cloud-dataproc","A_Id":56257964,"CreationDate":"2019-05-22T13:05:00.000","Title":"Is there any way to view a DataProc cluster's 'scheduled deletion' property in Python?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to develop Azure Functions in Python on Windows 10 PC. Every time I try to debug it I get this error: \"AttributeError: module 'azure.functions_worker' has no attribute 'start_async' \"\nI am running Python 3.6.8,\nAzure Function Core Tools (2.7.1158)\nAnd Function Run time: 2.0.12438.0\nVSCode latest\nTried to remove and re-install the Azure CLI","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":431,"Q_Id":56260100,"Users Score":0,"Answer":"I had exactly this problem on Win10 when I was using Python 3.6-32bit. Installing Python 3.6-64bit made the error go away, so it is worth giving that a try if you haven't already.","Q_Score":1,"Tags":"python,azure,azure-functions","A_Id":56356557,"CreationDate":"2019-05-22T15:17:00.000","Title":"Running Python Azure Functions on Windows 10 using VSCode","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'd like to be able to run behave from the context menu within the PyDev project explorer (i.e. right click (on a feature file or directory) Run As- Behave and have it run the feature file (or files) once run the any errors in the output would take you to the line in the file it refers to.\nIs this possible?\nI have set behave up as an external tool, which works but it isn't great","AnswerCount":3,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":763,"Q_Id":56260570,"Users Score":0,"Answer":"Eclipse (and PyDev) supports running other \"External Tools\" \/ Commands.\nFor behave, you just need to provide the definition to run a python script.\nIf anything fails, provide your own \"run_behave.py\" scripts that runs behave (much like the \"behave script\"). This also simplifies debugging.","Q_Score":0,"Tags":"python,eclipse,pydev,python-behave","A_Id":58050163,"CreationDate":"2019-05-22T15:44:00.000","Title":"Running behave within Eclipse\/PyDev","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"How do I create azure datafactory for incremental load using python?\nWhere should I mention file load option(Incremental Load:LastModifiedOn) while creating activity or pipeline??\nWe can do that using UI by selecting File Load Option. But how to do the same pragmatically using python?\nDoes python api for datafactory support this or not?","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":273,"Q_Id":56265151,"Users Score":0,"Answer":"My investigations suggest that the Python SDK has not yet implemented this feature.  I used the SDK to connect to my existing instance and fetched two example datasets.  I did not find anything that looked like the 'last modified date'.  I tried dataset.serialize() , dataset.__dict__ , dataset.properties.__dict__ .  I also tried .__slots__ .\nTrying serialize() is significant because there ought to be parity between the JSON generated in the GUI and the JSON generated by the Python.  The lack of parity suggests the SDK version lags behind the GUI version.\nUPDATE: The SDK's are being updated.","Q_Score":0,"Tags":"python,azure-data-factory,incremental-load","A_Id":56279704,"CreationDate":"2019-05-22T21:18:00.000","Title":"AzureDataFactory Incremental Load using Python","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Somehow supervisord hangs\/hungs 10 minutes after we do service supervisor start. Scripts initiated by supervisod still appears on the background as running but not functioning anymore. Any idea what could be the issue? Our current workaround was to install a cron job to restart supervisord every 10 minutes. supervisord version is 3.1.4 and python is 2.7.5","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":165,"Q_Id":56287294,"Users Score":0,"Answer":"you can run your scripts command in the shell, don't start it in supervisord . and wait 10 minutes to see if it work well. you can also write some log in your script.I use supervisord in many projects and almost problem is command error or code error.","Q_Score":0,"Tags":"python,supervisord","A_Id":56288939,"CreationDate":"2019-05-24T06:54:00.000","Title":"Supervisord Hangs\/Hungs on the Background after 10 minutes","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"As title. \nI noticed that calling p4 from the subprocess module is not very fast. But I hesitate learning the Perforce Python binding without knowing whether or not it performs better.\nI'd appreciate it if anyone could share the experience of trying both.\nEDIT\nI observed this on Win10\/desktop PC where my working copy is on an SSD drive. The commands I observed include add, edit, and reconcile over a large number of files and folders. I didn't do rigorous profiling but the perceived response from subprocess seems slower than the same operation in P4V.\nSam Stafford's answer makes sense if the p4 calls induce multi-connection overhead.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":255,"Q_Id":56292717,"Users Score":1,"Answer":"In general, using a p4 API is going to be faster than using the CLI, with the most dramatic gains apparent if you're running multiple commands, since the API lets you easily run multiple commands on a single server connection whereas the CLI binary establishes a connection for each invocation.","Q_Score":0,"Tags":"python,performance,perforce","A_Id":56295249,"CreationDate":"2019-05-24T12:29:00.000","Title":"p4python vs. calling p4 using subprocess, which way performs better?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm working on a python library \/ app that uses Gtk.\nPart of my build process uses glib-compile-schemas to create gschemas.compiled.\nIf I include gschemas.compiled in my library, will this break things, if somebody tries to use my library on something like ARM or 32 bit intel ?\n(I would compile this as a post-install thing, but that seems to unsupported in setuptools which I am using).","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":560,"Q_Id":56309056,"Users Score":0,"Answer":"This isn't a definitive answer, but I verified the file is the same for two different architectures build for a package and they are the same.\n(The debian i386 and arm64 packages for enchant).\nThese were chosen because of the different bit width (32 vs 64), and differing architectures.\nIf somebody writes a more definitive answer, I'll still accept that.","Q_Score":2,"Tags":"python,gtk,pygobject,gobject-introspection","A_Id":56313102,"CreationDate":"2019-05-25T21:58:00.000","Title":"Is gschemas.compiled architecture specific (can I ship it with my python library)?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am new to python and I am trying to scan multiple IPs with fping. I have large number of server to monitor for statistics and I could write the following code that works for 2 hosts:\n \n    import subprocess\n    import binascii\n\n    out = ''\n    err = ''\n\n    host1 = '172.2.2.5'\n    host2 = '172.1.5.8'\n    hosts = '\/tmp\/ip.list'\n\n    ping = subprocess.Popen(['fping', '-C', '10', '-b', '50', '-p', '25', host1, host2], stdout=subprocess.PIPE, stderr=subprocess.PIPE)\n\n    try:             \n        [out, err] = ping.communicate(timeout=15)\n\n        print('STDOUT')\n        print(out.decode('utf-8').strip())\n\n        print('STDERR (Statistics)')\n        print(err.decode('utf-8').strip())\n\n    except subprocess.TimeoutExpired:\n        print('STDERR (expired timeout)')\n\nHowever, I am unable to replace the two hosts with list of host files, though I tried in multiple ways.\nI would very much appreciate any help this regard or any improvements in the program itself.\nTIA.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":1342,"Q_Id":56312105,"Users Score":0,"Answer":"I found a simple fix:\n\n\nwith open('ip_list.csv', 'r') as fh:\n    all_ips = fh.read().splitlines()\n\ncmd = ['fping', '-C', '10', '-b', '50', '-p', '25']\ncmd.extend(all_ips)\n\nping = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)","Q_Score":0,"Tags":"python,linux,python-3.x,centos7,ping","A_Id":56313367,"CreationDate":"2019-05-26T09:00:00.000","Title":"fping using IP list in python3","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying google cloud's dataflow service which is useful for efficient computation time. My code has the following programming model for the dataflow pipeline:\n\nstart=(p | \"read\" >> beam.io.ReadFromText(\"gcs path\")) \n  end= start | \"data_generation\" >> beam.Pardo(PerfromFunction)\n\nWhat I am doing:\nPerformFunction is a regular Python function which contains a few series of functions for data-generation purpose. My problem is that when I run this function on a regular VM of n1-standard-16 on a single processor, it takes around 1 hour to complete the whole process.\nWhy I opted Dataflow:\nI then decided to go for Dataflow where a ParDo function performs Multi-Threading of the given function and obviously to reduce the computational time from 1 hour to less than 1 hour.\nThe Problem:\nAfter running a Dataflow job with the above-mentioned programming model, I came to realize that Dataflow is still taking around 1 hour to complete the entire process which is mentioned as wall-time on the GCP Dataflow UI. I then logged in to the worker machine and saw the resource utilization using the command htop and found that the machine was only utilizing one processor with 60% average usage.\nExpected Results or Suggestions:\n1. Can multiprocessing be done in the Dataflow worker Cluster?\n2. Is my programming model very limited and wrong?\n3. ParDo function does not seem to reduce the computational time as expected, What do you think I am doing wrong here?\nPS- Owing to some protocols, I can not share the code. Thank you for understanding. Also please correct me if I wrongly understand dataflow at some point.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":249,"Q_Id":56313281,"Users Score":0,"Answer":"Apache Beam, and Dataflow are able to parallelize your computation based on the input that comes into it.\nIf you have a single computation to apply, and this computation takes one hour, then Beam will not be able to speed up your computation. Beam can help you if you need to apply the same computation multiple times to different elements (or data points).\nYou should also consider things such as overhead of running the computation in a distributed fashion (data copying, network calls, etc).\nSo, to be able to answer your question: How may individual \"data points\" (how many lines) are there in your GCS file? Is it possible to parallelize the computation over each one? How long does it take to process each one?","Q_Score":0,"Tags":"python-2.7,google-cloud-platform,google-cloud-dataflow,dataflow","A_Id":56369003,"CreationDate":"2019-05-26T11:58:00.000","Title":"Google Cloud Dataflow: Dataflow programming model taking same computational time as it would take on a regular VM machine?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I am trying to connect to a customer's DB via ODBC. The ODBC DSN was setup on the the Windows machine. I don't know the path to the DB or the DB name so I have to rely on the DSN.\nFrom what I've seen in general this does not seem to be possible, but I know Pervasive ODBC allows it and seems like MSSQL also allows it.\nQuestion is, does Firebird 2.5 allow this? If it does could you please help me with the connection string\nI've set up a Firebird DB on a local windows machine, created an ODBC DSN (and tested the connection locally).\nI then tested connections from unixODBC (isql) and python pyodbc and they all connect fine, but I have to specify DB location and name and credentials.\nI need to connect to the remote (windows) Firebird ODBC DSN from python 3.6 pyodbc (linux)","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":307,"Q_Id":56323397,"Users Score":2,"Answer":"What you want isn't possible*. An ODBC DSN exists only on the machine where it is defined. It is basically a connection configuration that is decoupled from your application, and your application references the configuration by a name.\nYou can't use a DSN remotely (if that were possible, that would be a pretty big security leak). You will need to define a DSN (or use a DSN-less connection string), on your specific machine to be able to use it from that machine.\nGiven you're using Python, consider using FDB or pyfirebirdsql instead of using pyODBC.\n\n* Or at least, not possible without some middleware service on the remote machine that mediates between your application and the ODBC DSN on the remote machine.","Q_Score":0,"Tags":"python-3.x,odbc,firebird,pyodbc","A_Id":56325957,"CreationDate":"2019-05-27T09:36:00.000","Title":"Connect from python3 - pyodbc (linux) to a firebird 2.5 (windows) ODBC DSN on remote machine","Data Science and Machine Learning":0,"Database and SQL":1,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a BigQuery table 'A' with schema {'UUID': 'String'}. I want to join this table with a ADH(Ads Data Hub) table 'B' having schema {'UUID': 'String', 'USER_ID': 'INT'} on UUID and fetch all user_ids to a new table. \nI am having trouble in joining ADH table with BigQuery table.\nCan someone please help me out?","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":774,"Q_Id":56339554,"Users Score":0,"Answer":"If your table A locates in the same region as your ADH account, you should be able to run cross table queries in ADH.\nYou cannot query user_id as part of the output by using ADH, it's not allowed due to privacy protection. However, if you had your UUID passed to Google Marketing Platform using floodlight with custom-variable enabled, you can use this UUID as join key to map both tables, and do analysis from there.","Q_Score":0,"Tags":"google-bigquery,google-ads-data-hub,ads-data-hub,python-bigquery","A_Id":68575038,"CreationDate":"2019-05-28T09:54:00.000","Title":"How to join BigQuery table with ADH(Ads Data Hub) table","Data Science and Machine Learning":0,"Database and SQL":1,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I have recently set up the latest version of anaconda and when I open my anaconda command prompt an error message occurs.\nDue to this issue, I am also not able to set up venv in my anaconda.\nI have tried to search that conda-645.tmp but I haven't found that in that particular location as well.\n\nAccess is denied. The system cannot find the file C:\\Users\\UDIT. Could\n  Not Find C:\\Users\\UDIT DEO\\AppData\\Local\\Temp\\conda-645.tmp","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":135,"Q_Id":56356470,"Users Score":0,"Answer":"Try running it as administrator.\nThis should solve this error.","Q_Score":0,"Tags":"python-3.x,anaconda","A_Id":56356701,"CreationDate":"2019-05-29T08:45:00.000","Title":"Whenever I open my anaconda command prompt the error message occurs, so help me with it","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"pip install MySQL-python-1.2.4b4.tar.gz returns this error on Python 2.7 (ubuntu 18.04):\nCan you help me?\n\n    # pip install MySQL-python-1.2.5.zip\n    Processing .\/MySQL-python-1.2.5.zip\n    Building wheels for collected packages: MySQL-python\n      Running setup.py bdist_wheel for MySQL-python ... error\n      Complete output from command \/usr\/bin\/python -u -c \"import setuptools, tokenize;__file__='\/tmp\/pip-00mbCK-build\/setup.py';f=getattr(tokeni                                                                                                 ze, 'open', open)(__file__);code=f.read().replace('\\r\\n', '\\n');f.close();exec(compile(code, __file__, 'exec'))\" bdist_wheel -d \/tmp\/tmpePf4                                                                                                 ITpip-wheel- --python-tag cp27:\n      running bdist_wheel\n      running build\n      running build_py\n      creating build\n      creating build\/lib.linux-x86_64-2.7\n      copying _mysql_exceptions.py -> build\/lib.linux-x86_64-2.7\n      creating build\/lib.linux-x86_64-2.7\/MySQLdb\n      copying MySQLdb\/__init__.py -> build\/lib.linux-x86_64-2.7\/MySQLdb\n      copying MySQLdb\/converters.py -> build\/lib.linux-x86_64-2.7\/MySQLdb\n      copying MySQLdb\/connections.py -> build\/lib.linux-x86_64-2.7\/MySQLdb\n      copying MySQLdb\/cursors.py -> build\/lib.linux-x86_64-2.7\/MySQLdb\n      copying MySQLdb\/release.py -> build\/lib.linux-x86_64-2.7\/MySQLdb\n      copying MySQLdb\/times.py -> build\/lib.linux-x86_64-2.7\/MySQLdb\n      creating build\/lib.linux-x86_64-2.7\/MySQLdb\/constants\n      copying MySQLdb\/constants\/__init__.py -> build\/lib.linux-x86_64-2.7\/MySQLdb\/constants\n      copying MySQLdb\/constants\/CR.py -> build\/lib.linux-x86_64-2.7\/MySQLdb\/constants\n      copying MySQLdb\/constants\/FIELD_TYPE.py -> build\/lib.linux-x86_64-2.7\/MySQLdb\/constants\n      copying MySQLdb\/constants\/ER.py -> build\/lib.linux-x86_64-2.7\/MySQLdb\/constants\n      copying MySQLdb\/constants\/FLAG.py -> build\/lib.linux-x86_64-2.7\/MySQLdb\/constants\n      copying MySQLdb\/constants\/REFRESH.py -> build\/lib.linux-x86_64-2.7\/MySQLdb\/constants\n      copying MySQLdb\/constants\/CLIENT.py -> build\/lib.linux-x86_64-2.7\/MySQLdb\/constants\n      running build_ext\n      building '_mysql' extension\n      creating build\/temp.linux-x86_64-2.7\n      x86_64-linux-gnu-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fno-strict-aliasing -Wdate-time -D_FORTIFY_SOURCE=2 -g -f                                                                                                 debug-prefix-map=\/build\/python2.7-3hk45v\/python2.7-2.7.15~rc1=. -fstack-protector-strong -Wformat -Werror=format-security -fPIC -Dversion_in                                                                                                 fo=(1,2,5,'final',1) -D__version__=1.2.5 -I\/usr\/include\/mysql -I\/usr\/include\/python2.7 -c _mysql.c -o build\/temp.linux-x86_64-2.7\/_mysql.o\n      _mysql.c:44:10: fatal error: my_config.h: No such file or directory\n       #include \"my_config.h\"\n                ^~~~~~~~~~~~~\n      compilation terminated.\n      error: command 'x86_64-linux-gnu-gcc' failed with exit status 1\n\n      ----------------------------------------\n      Failed building wheel for MySQL-python\n      Running setup.py clean for MySQL-python\n    Failed to build MySQL-python\n    Installing collected packages: MySQL-python\n      Running setup.py install for MySQL-python ... error\n        Complete output from command \/usr\/bin\/python -u -c \"import setuptools, tokenize;__file__='\/tmp\/pip-00mbCK-build\/setup.py';f=getattr(toke                                                                                                 nize, 'open', open)(__file__);code=f.read().replace('\\r\\n', '\\n');f.close();exec(compile(code, __file__, 'exec'))\" install --record \/tmp\/pip                                                                                                 -vhjCMt-record\/install-record.txt --single-version-externally-managed --compile:\n        running install\n        running build\n        running build_py\n        creating build\n        creating build\/lib.linux-x86_64-2.7\n        copying _mysql_exceptions.py -> build\/lib.linux-x86_64-2.7\n        creating build\/lib.linux-x86_64-2.7\/MySQLdb\n        copying MySQLdb\/__init__.py -> build\/lib.linux-x86_64-2.7\/MySQLdb\n        copying MySQLdb\/converters.py -> build\/lib.linux-x86_64-2.7\/MySQLdb\n        copying MySQLdb\/connections.py -> build\/lib.linux-x86_64-2.7\/MySQLdb\n        copying MySQLdb\/cursors.py -> build\/lib.linux-x86_64-2.7\/MySQLdb\n        copying MySQLdb\/release.py -> build\/lib.linux-x86_64-2.7\/MySQLdb\n        copying MySQLdb\/times.py -> build\/lib.linux-x86_64-2.7\/MySQLdb\n        creating build\/lib.linux-x86_64-2.7\/MySQLdb\/constants\n        copying MySQLdb\/constants\/__init__.py -> build\/lib.linux-x86_64-2.7\/MySQLdb\/constants\n        copying MySQLdb\/constants\/CR.py -> build\/lib.linux-x86_64-2.7\/MySQLdb\/constants\n        copying MySQLdb\/constants\/FIELD_TYPE.py -> build\/lib.linux-x86_64-2.7\/MySQLdb\/constants\n        copying MySQLdb\/constants\/ER.py -> build\/lib.linux-x86_64-2.7\/MySQLdb\/constants\n        copying MySQLdb\/constants\/FLAG.py -> build\/lib.linux-x86_64-2.7\/MySQLdb\/constants\n        copying MySQLdb\/constants\/REFRESH.py -> build\/lib.linux-x86_64-2.7\/MySQLdb\/constants\n        copying MySQLdb\/constants\/CLIENT.py -> build\/lib.linux-x86_64-2.7\/MySQLdb\/constants\n        running build_ext\n        building '_mysql' extension\n        creating build\/temp.linux-x86_64-2.7\n        x86_64-linux-gnu-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fno-strict-aliasing -Wdate-time -D_FORTIFY_SOURCE=2 -g                                                                                                  -fdebug-prefix-map=\/build\/python2.7-3hk45v\/python2.7-2.7.15~rc1=. -fstack-protector-strong -Wformat -Werror=format-security -fPIC -Dversion_                                                                                                 info=(1,2,5,'final',1) -D__version__=1.2.5 -I\/usr\/include\/mysql -I\/usr\/include\/python2.7 -c _mysql.c -o build\/temp.linux-x86_64-2.7\/_mysql.o\n        _mysql.c:44:10: fatal error: my_config.h: No such file or directory\n         #include \"my_config.h\"\n                  ^~~~~~~~~~~~~\n        compilation terminated.\n        error: command 'x86_64-linux-gnu-gcc' failed with exit status 1\n\n        ----------------------------------------\n    Command \"\/usr\/bin\/python -u -c \"import setuptools, tokenize;__file__='\/tmp\/pip-00mbCK-build\/setup.py';f=getattr(tokenize, 'open', open)(__fi                                                                                                 le__);code=f.read().replace('\\r\\n', '\\n');f.close();exec(compile(code, __file__, 'exec'))\" install --record \/tmp\/pip-vhjCMt-record\/install-r                                                                                                 ecord.txt --single-version-externally-managed --compile\" failed with error code 1 in \/tmp\/pip-00mbCK-build\/\n\nThanks.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":443,"Q_Id":56361162,"Users Score":0,"Answer":"If you use: \n\npip install mysqlclient==1.4.6\n\ninstead, then you'll find it works. The mariadb package has changed the way it stores some header files, and the MySQL-python pip package hasn't been updated for many years.\nI had the same problem and switching worked for me.","Q_Score":2,"Tags":"mysql-python","A_Id":60338668,"CreationDate":"2019-05-29T12:52:00.000","Title":"Installing MySQLdb for python 2.7 returns error","Data Science and Machine Learning":0,"Database and SQL":1,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm currently trying to establish a connection between a chrome-extension and a NativeMessagingHost. Everything works fine on Windows, but it won't do on Linux (either arch, kali or ubuntu). \nHow it fails: \n\nCan't find manifest for native messaging host my_host.json\n\nMy current state:\n\nhave my host manifest under ~\/.config\/google-chrome-beta\/NativeMessagingHosts\/my_host.json\n\nin there: \"name\":\"my_host.json\" and the path to my python script which handles the messages, also the unique chrome-extension code unter allowed_origins\n\nin manifest.json of my extension given the permission for nativeMessaging\nfurthermore in popup.js: var port = chrome.runtime.connectNative(\"my_host.json\"); and the same name used in sendNativeMessage\n\nWhat I tried so far:\n\ntried with google-chrome-beta and -stable\ndeleted file endings e.g. my_host.json to my_host, or removing the python ending\neasier paths where my python script lays\nalso tried to put my_host into \/Library\/Google\/Chrome\/NativeMessagingHosts which typically should be the Mac path - but hey, may it worked (not..)\n\nI get no error starting the application, copied the message from terminal whilst starting chrome with logging.\nI pretty much went through the example google gave, adjusting paths etc.\nAlso went through differnt posts, but it seems no one has the same problem, or no one tries to do something similar.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":257,"Q_Id":56361604,"Users Score":0,"Answer":"So I figured out where the problem was: \nI changed the name of my host from my_host.json to com.my.host.json and set \"name\" to com.my.host (where I firstly had the ending .json as well, which probably caused the problem too). Furthermore I changed var port = chrome.runtime.connectNative(\"my_host.json\") in my js-file to [...](\"com.my.host\") where the ending .json was not right too. Everything works now. Thank you for your suggestions!","Q_Score":0,"Tags":"javascript,python,google-chrome-extension","A_Id":56376376,"CreationDate":"2019-05-29T13:18:00.000","Title":"Manifest for native messaging host not found","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"so I have an airflow DAG task which performs several checks on a file (e.g., if it was already processed in the past) and I want the whole DAG run to stop completely if one of the checks fails. How can I do that?\nBasically the checks are done in a python script.\nThx :","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":3441,"Q_Id":56368548,"Users Score":6,"Answer":"Assuming you have no downstream tasks that ignore the failure of a previous task, raising an exception from within the task will cause the DAG to stop processing and be marked as failed.\nSo in your case, you can raise an exception when you find that the file has already been processed.","Q_Score":5,"Tags":"python,airflow","A_Id":56370441,"CreationDate":"2019-05-29T21:09:00.000","Title":"How to stop a Airflow DAG run from task","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"In some of my Apache Airflow installations, DAGs or tasks that are scheduled to run do not run even when the scheduler doesn't appear to be fully loaded. How can I increase the number of DAGs or tasks that can run concurrently?\nSimilarly, if my installation is under high load and I want to limit how quickly my Airflow workers pull queued tasks (such as to reduce resource consumption), what can I adjust to reduce the average load?","AnswerCount":3,"Available Count":1,"Score":0.1325487884,"is_accepted":false,"ViewCount":46382,"Q_Id":56370720,"Users Score":2,"Answer":"Check the airflow configuration for which core.executor is used.\nSequentialExecutor will be executing sequentially, so you can choose Local Executor or Clery Executor which execute the task parallel.\nAfter that, you can use other options as mentioned by @hexacyanide","Q_Score":53,"Tags":"python,google-cloud-platform,airflow,google-cloud-composer","A_Id":56630703,"CreationDate":"2019-05-30T02:00:00.000","Title":"How to control the parallelism or concurrency of an Airflow installation?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"So i'm pretty new to the whole windows repo cloning thing. I installed python 2.7, added the path to my windows cmd and I still cannot run any git clone commands. It shows the following output :\ngit clone\n  File \"\", line 1\n    git clone\n            ^\nI've been scouring the internet for an answer but apparently it should work if I use cmd. \nAny help would be appreciated!\ngit clone\n  File \"\", line 1\n    git clone\n            ^","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":356,"Q_Id":56387414,"Users Score":0,"Answer":"I have had the same issue recently with 3.7, so I made a new username and it worked. Kind of nice, a clean new Windows profile, even though I just started using it again compared to linux. A pain though.\nMake sure all other versions of Python are not installed, or at least affecting the path to the file you need the pip installs to be saved. Python can be saved in a few different locations, and some rare times it has been shown in very obscure places. Check where your file saved on your PC. Probablu C:\/ then could be many paths. \/Users\/UnserNameHere\/Windows\/ProgramFiles. I would use the search bar in the good old GUI while searching under the C drive (if you have multiple HDD\/SDD then pic the one used for the C drive, if nothing comes up try the other drives. \nYour looking for a file PythonFoundation I can't remember the entire name, however it will have a very long name Python Foundation are in the name of the file. This is where thing are store and where the path should be sending modules, at least the correct file inside that file. \nAlso try doing it from other Python versions installed. If you had 3.6 and got 3.7 it doesn't mean 3.6 has been deleted. Also doesn't mean you path, is not set to 3.6 while using 3.7. Same with Python 2, most people or many have both. The pip commands vary between python versions pip3 I believe is used (getting windows and linux a little mixed up right now)\nIf all fails do it the old fashon way, find the mod, download it, and move it to the python file I mentioned above. The homepage for python should have a tab linking to a page, or it's on the main page, letting you know where it has been known to save. Google how to see he path Pip is taking, or how to see if pip is installed and where, and what paths are set to.","Q_Score":0,"Tags":"windows,python-2.7,cmd","A_Id":56387612,"CreationDate":"2019-05-31T00:58:00.000","Title":"Cannot run git clone or pip install commands","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"This is my first question so I appologize if it's not the best quality.\nI have a use case: User creates a monitoring task which sends an http request to a website every X hours. User can have thousands of these tasks and can add\/modify and delete them. When a user creates a task, django signals create a Celery periodic task which then is running periodically.\nI'm searching for a more scalable solution using AWS. I've read about using Lambda + Cloudwatch Events. \nMy question is: how do I approach this to let my users create tens of thousands of these tasks in the cheapest \/ most scalable way?\nThank you for reading my question!\nPeter","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":209,"Q_Id":56413651,"Users Score":0,"Answer":"There is no straight forward solution to your problem .You have to proceed step by step with some plumbing along the way .\nEvent management\n1- Create a lambda function that creates a cloudwatch schedule.\n2 - Create a lambda function that deletes a cloudwatch schedule.\n3 - Persist any event created using dynamodb\n4 - Create 2 API gateway  that will invoke the 2 lambda above.\n5 - Create anohter lambda function (used by cloudwatch) that will invoke the API gateway below.\n6 - Create API gateway that will invoke the website via http request.\nWhen the user creates an event from the app, there will be a chaining calls as follow :\n4 -> 1,3 -> 5-> 6\nNow there are two other parameters to take into consideration :\nLambda concurrency: you can't run simultaneously more than 1000 lambda in same region.\nCloudwatch: You can not create more than 100 rules per region . Rule is where you define the schedule.","Q_Score":1,"Tags":"python,django,amazon-web-services,aws-lambda,amazon-cloudwatch","A_Id":56414951,"CreationDate":"2019-06-02T09:05:00.000","Title":"What is a scalable way of creating cron jobs on Amazon Web Services?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I have images in a sub-folder. Let's the folder images\nI have a python program which will take image arguments from the folder one by one, the images are named in sequential order (1.jpg , 2.jpg, 3.jpg and so on).\nThe call to the program is : python prog.py 1.jpg\nWhat will be a shell script to automate this ?\nPlease ask for any additional information.","AnswerCount":3,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":78,"Q_Id":56438069,"Users Score":1,"Answer":"Try this from the folder that contains images\/:\nfor i in images\/*.jpg; do\n  python prog.py $i\ndone","Q_Score":0,"Tags":"python,python-3.x,shell","A_Id":56438141,"CreationDate":"2019-06-04T05:56:00.000","Title":"Shell script to call python program with changing arguments","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a python script and i want to make a single .exe file for windows.\nand run it in the background that's mean do not display shell.\ni use :\npyinstaller --onefile script.py\nbut shell displaying...","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":360,"Q_Id":56443307,"Users Score":0,"Answer":"If your main aim is to make the file run in the background (i.e. without displaying the shell), then you can simply rename the python file to a .pyw file, and run it, meaning your file becomes script.pyw. You can also use the same pyinstaller command on the script.pyw file","Q_Score":0,"Tags":"python,python-3.x","A_Id":56444214,"CreationDate":"2019-06-04T11:49:00.000","Title":"How to compile python script to standalone executable windows file that could open without shell","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have two clients (separate docker containers) both writing to a Cassandra cluster.\nThe first is writing real-time data, which is ingested at a rate that the cluster can handle, albeit with little spare capacity. This is regarded as high-priority data and we don't want to drop any. The ingestion rate varies quite a lot from minute to minute. Sometimes data backs up in the queue from which the client reads and at other times the client has cleared the queue and is (briefly) waiting for more data.\nThe second is a bulk data dump from an online store. We want to write it to Cassandra as fast as possible at a rate that soaks up whatever spare capacity there is after the real-time data is written, but without causing the cluster to start issuing timeouts.\nUsing the DataStax Python driver and keeping the two clients separate (i.e. they shouldn't have to know about or interact with each other), how can I throttle writes from the second client such that it maximises write throughput subject to the constraint of not impacting the write throughput of the first client?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":246,"Q_Id":56474650,"Users Score":0,"Answer":"The solution I came up with was to make both data producers write to the same queue.\nTo meet the requirement that the low-priority bulk data doesn't interfere with the high-priority live data, I made the producer of the low-priority data check the queue length and then add a record to the queue only if the queue length is below a suitable threshold (in my case 5 messages).\nThe result is that no live data message can have more than 5 bulk data messages in front of it in the queue. If messages start backing up on the queue then the bulk data producer stops queuing more data until the queue length falls below the threshold.\nI also split the bulk data into many small messages so that they are relatively quick to process by the consumer.\nThere are three disadvantages of this approach:\n\nThere is no visibility of how many queued messages are low priority and how many are high priority. However we know that there can't be more than 5 low priority messages.\nThe producer of low-priority messages has to poll the queue to get the current length, which generates a small extra load on the queue server.\nThe threshold isn't applied strictly because there is a race between the two producers from checking the queue length to queuing a message. It's not serious because the low-priority producer queues only a single message when it loses the race and next time it will know the queue is too long and wait.","Q_Score":0,"Tags":"python,cassandra,datastax-python-driver","A_Id":56577125,"CreationDate":"2019-06-06T09:28:00.000","Title":"Cassandra write throttling with multiple clients","Data Science and Machine Learning":1,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have built a local environment on my computer to test Dags in airflow however when I got to initiate the database in the terminal with airflow initdb I am prompted with an error message.\nThe message has to do with the package Alembic and reads alembic.util.exc.CommandError: Can't locate revision identified by '939bb1e647c8'\nAny suggestions to fix?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":493,"Q_Id":56482847,"Users Score":-1,"Answer":"Fixed it by reentering the database path in the config file.","Q_Score":0,"Tags":"python,shell,terminal,airflow,alembic","A_Id":56485892,"CreationDate":"2019-06-06T18:00:00.000","Title":"Error when initiating Data Base in Apache Airflow","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have set up a Raspberry Pi connected to an LED strip which is controllable from my phone via a Node server I have running on the RasPi. It triggers a simple python script that sets a colour.\nI'm looking to expand the functionality such that I have a python script continuously running and I can send colours to it that it will consume the new colour and display both the old and new colour side by side. I.e the python script can receive commands and manage state.\nI've looked into whether to use a simple loop or a deamon for this but I don't understand how to both run a script continuously and receive the new commands.\nIs it better to keep state in the Node server and keep sending a lot of simple commands to a basic python script or to write a more involved python script that can receive few simpler commands and continuously update the lights?","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":302,"Q_Id":56504180,"Users Score":1,"Answer":"IIUC, you don't necessarily need to have the python script running continuously. It just needs to store state, and you can do this by writing the state to a file. The script can then just read the last state file at startup, decide what to do from thereon, perform action, then update the state file.\nIn case you do want to actually run the script continuously though, you need a way to accept the commands. The simplest way for a daemon to accept command is probably through signal, you can use custom signal e.g. SIGUSR1 and SIGUSR2 to send and receive these notifications. These may be sufficient if your daemon only need to accept very simple request.\nFor more complex request where you need to actually accept messages, you can listen to a Unix socket or listen to a TCP socket. The socket module in the standard library can help you with that. If you want to build a more complex command server, then you may even want to consider running a full HTTP server, though this looks overkill for the current situation.\n\nIs it better to keep state in the Node server and keep sending a lot of simple commands to a basic python script or to write a more involved python script that can receive few simpler commands and continuously update the lights?\n\nThere's no straightforward answer to that. It depends on case by case basis, how complex the state is, how frequently you need to change colour, how familiar you are with the languages, etc.","Q_Score":0,"Tags":"python,node.js,command-line,raspberry-pi","A_Id":56504287,"CreationDate":"2019-06-08T06:50:00.000","Title":"How to run a Python script continuously that can receive commands from node","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I apologize if this is not the correct site for this.  If it is not, please let me know.\nHere's some background on what I am attempting.  We are working on a series of chat bots that will go into production.  Each of them will run on a  environment in Anaconda.  However, our setup uses tensorflow, which uses gcc to be compiled, and compliance has banned compilers from production.  In addition, compliance rules also frown on us using pip or conda install in production.\nAs a way to get around this, I'm trying to tar the Anaconda 3 folder and move it into prod, with all dependencies already compiled and installed.  However, the accounts between environments have different names, so this requires me to go into the bin folder (at the very least; I'm sure I will need to change them in the lib and pckg folders as well) and use sed -i to rename the hard coded paths to point from \\home\\<dev account>\\anaconda to \\home\\<prod account>\\anaconda, and while this seems to work, its also a good way to mangle my installation.\nMy questions are as follows:\n\nIs there any good way to transfer anaconda from one user to another, without having to use sed -i on these paths? I've already read that Anaconda itself does not support this, but I would like your input.\nIs there any way for me to install anaconda in dev so the scripts in it are either hard coded to use the production account name in their paths, or to use ~.\nIf I must continue to use sed, is there anything critical I should be aware of? For example, when I use grep <dev account> *, I will some files listed as binary file matches.  DO I need to do anything special to change these?  \n\nAnd once again, I am well aware that I should just create a new Anaconda installation on the production machine, but that is simply not an option.\nEdit:\nSo far, I've changed the conda.sh and conda.csh files in \/etc, as well as the conda, activate, and deactivate files in the root bin.  As such, I'm able to activate and deactivate my environment on the new user account.  Also, I've changed the files in the bin folder under the bot environment.  Right now, I'm trying to train the bot to test if this works, but it keeps failing and stating that a custom action does not exist in the the list.  I don't think that is related to this, though.\nEdit2:\nI've confirmed that the error I was getting was not related to this.  In order to get the bot to work properly with a ported version of Anaconda, all I had to change was the the conda.sh and conda.csh files in \/etc so their paths to python use ~, do the same for the activate and deactivate files in \/bin, and change the shebang line in the conda file in \/bin to use the actual account name.  This leaves every other file in \/bin and lib still using the old account name in their shebang lines and other variable that use the path, and yet the bots work as expected.  By all rights, I don't think this should work, but it does.","AnswerCount":3,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":3056,"Q_Id":56508782,"Users Score":0,"Answer":"but they may be inserted into binaries as well\n\nI can confirm that some packages have hard-coded the absolute path (including username) into the compiled binary. But if you restrict usernames to have the same length, you can apply sed on both binary and text files to make almost everything work as perfect.\nOn the other hand, if you copy the entire folder and use sed to replace usernames on only text files, you can run most of the installed packages. However, operations involving run-time compilation might fail, one example is installing a new package that requires compilation during installation.","Q_Score":2,"Tags":"python,installation,anaconda,virtualenv","A_Id":65776660,"CreationDate":"2019-06-08T17:44:00.000","Title":"Moving Anaconda installation from one user account to another","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I would like to develop a command-line program that located in C:\\assistant\\myassis.py\nEverytime when i want to run my program I should enter this command in my command line: $ python3.6 C:\\assistant\\myassis.py\nI want to set an specific command for my program which let me to use my program in every folder with a short command.\nfor instance:\n$ assis download file --test should require $ python3.6 C:\\assistant\\myassis.py download file --test.\nHow can i do it in my windows10?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":65,"Q_Id":56537697,"Users Score":0,"Answer":"To run python programs simply clicking on it or entering its name you can set association. Python installer makes it by default, don't know why you havn't one. To check it enter assoc .py then ftype <type which assoc shows>, to set - assoc .py=Python.File then ftype Python.File=\"C:\\WINDOWS\\py.exe\" \"%L\" %*. \nTo run a script\/program from any folder without entering full path one has two options:\n\n\nPATH environment variable - put your script anywhere in PATH, for example - C:\\WINDOWS, C:\\PythonXX\\Scripts, C:\\Sys. Check path - path, set path - path %PATH;My dir, set\/check permanent path - Win+Break -> Additional system parameters -> Environment variables.\napppath: Edit registry HKEY_CURRENT_USER\\Software\\Microsoft\\Windows\\CurrentVersion\\App Paths or HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\App Paths add entry like other.\n\nIf you don't want to enter '.py' suffix, and run you script.py simply as script, add ';.PY' to PATHEXT variable.\nLooking at your examples which begins with '$' it seems you are using not Windows shell and\/or python but some port of bash, maybe windows subsystems for linux (WSL) or git bash. In this case, paragraph 1 changes to 'add #!\/usr\/bin\/env python3 as the first line of you scripts', p.2. - use separate, Linux PATH variable, p.3. - use alias","Q_Score":0,"Tags":"python,windows,command-line","A_Id":56538307,"CreationDate":"2019-06-11T06:25:00.000","Title":"Set an specific command for a python program","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"The ACS url in the Google SSO SAML setup where Google is the Identity Provider has to start with https. Therefore, I've not been able to use a localhost url. Is there a way how I could test Google SSO SAML on a local server? What url (or other details) do I need to enter?","AnswerCount":5,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":5382,"Q_Id":56581853,"Users Score":0,"Answer":"I had same problem , i ran my app on localhost with https using local iis with self signed certificate and it worked just fine.\nThis way its easy to debug saml response from google rather than using remote urls.","Q_Score":5,"Tags":"python,google-cloud-platform,single-sign-on,saml-2.0,google-sso","A_Id":59552333,"CreationDate":"2019-06-13T13:40:00.000","Title":"Test Google SSO SAML on Localhost","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"When connecting to a remote kernel through SSH in Spyder, does the processing all done in the remote kernel and not using the local machine's resources?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":111,"Q_Id":56590616,"Users Score":0,"Answer":"(Spyder maintainer here) That's correct, all computations are run in the server where the remote kernel was started and not in your local machine.","Q_Score":0,"Tags":"python,spyder","A_Id":56629797,"CreationDate":"2019-06-14T02:19:00.000","Title":"Spyder Remote Kernel Processing","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am attempting to download modules in Python through pip. No matter how many times I edit the PATH to show the pip.exe, it shows the same error:\n'pip' is not recognized as an internal or external command,\noperable program or batch file.\nI have changed the PATH many different times and ways to make pip usable, but these changes go unnoticed by the command prompt terminal.\nHow should I fix this?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":88,"Q_Id":56591058,"Users Score":0,"Answer":"Are you using PyCharm? if yes change the environment to your desired directory and desired interpreter if you do have multiple interpreter available","Q_Score":0,"Tags":"python,path,pip","A_Id":56592051,"CreationDate":"2019-06-14T03:35:00.000","Title":"Command prompt does not recognize changes in PATH. How do I fix this?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"'ipython' is not recognized as an internal or external command,\noperable program or batch file.\nI have tried reinstalling python with add python to path optin .But that didn't work either.\n'ipython' input \n'ipython' is not recognized as an internal or external command,\noperable program or batch file.","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":128,"Q_Id":56597423,"Users Score":0,"Answer":"Uninstalling and installing ipython worked for me (add --user in case you are using Linux), the following was run on MacOS:\npip3 uninstall ipython\n\npip3 install ipython\nIf the above doesn't work for you, the solution mentioned (here)[https:\/\/blog.karatos.in\/a?ID=00750-d6f5f14c-60f3-443d-b038-9356723547ef] might be of some help: -\n\nCheck IPython version (python3 -m IPython --version) to see if IPython has been installed correctly.\nCheck if running python3 -m IPython opens the python shell for you.\nSet an alias for the command python3 -m IPython in your .bash_profile file.","Q_Score":0,"Tags":"ipython","A_Id":72012903,"CreationDate":"2019-06-14T11:39:00.000","Title":"I have installed ipython ,but could not open it","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"My Python code constructs a string in the form\nmyCmd = 'databricks fs cp dbfs:\/mnt\/extracts\/dsp\/{}\/full.xml \"{}\"'.format(extractId, file_path)\nThis results in a string like this:\ndatabricks fs cp dbfs:\/\/mt\/extracts\/dsp\/123\/full.xml \"c:\\filepath\\full.xml\"\nWhen I attempt to run this string using os.system(myCmd) I'm given the following warning (either within the Python console, or in the cmd window):\nError: InvalidConfigurationError: You haven't configured the CLI yet! Please configure by entering `C:\\Users\\xxxx\\AppData\\Local\\Continuum\\anaconda3\\Scripts\\databricks configure\nBut when i copy and paste the constructed myCmd to the command prompt the databricks copy works fine.\nI've tried running databricks configure then re-running the Python code, and that doesn't work.","AnswerCount":3,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":6839,"Q_Id":56611207,"Users Score":0,"Answer":"I also had same error message in different context when dealing with mlflow objects\nLater I observed that I was getting this error only when I install mlflow as\n!pip install mlflow\ninstead of\n%pip install mlflow","Q_Score":0,"Tags":"python,python-3.x,command-line,databricks","A_Id":71694385,"CreationDate":"2019-06-15T14:21:00.000","Title":"Databricks command says databricks-cli isn't configured when run from Python (with os.system()) but works fine when pasted into command line","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"My Python code constructs a string in the form\nmyCmd = 'databricks fs cp dbfs:\/mnt\/extracts\/dsp\/{}\/full.xml \"{}\"'.format(extractId, file_path)\nThis results in a string like this:\ndatabricks fs cp dbfs:\/\/mt\/extracts\/dsp\/123\/full.xml \"c:\\filepath\\full.xml\"\nWhen I attempt to run this string using os.system(myCmd) I'm given the following warning (either within the Python console, or in the cmd window):\nError: InvalidConfigurationError: You haven't configured the CLI yet! Please configure by entering `C:\\Users\\xxxx\\AppData\\Local\\Continuum\\anaconda3\\Scripts\\databricks configure\nBut when i copy and paste the constructed myCmd to the command prompt the databricks copy works fine.\nI've tried running databricks configure then re-running the Python code, and that doesn't work.","AnswerCount":3,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":6839,"Q_Id":56611207,"Users Score":0,"Answer":"Same issue for me. It said \"You haven't configured the CLI yet!\" from within the Python Notebook. I changed the Python version to 3 from 2 and it worked fine. Also changing the Databricks Runtime version to something like 5.5-LTS-ML fixes the issue.","Q_Score":0,"Tags":"python,python-3.x,command-line,databricks","A_Id":59011680,"CreationDate":"2019-06-15T14:21:00.000","Title":"Databricks command says databricks-cli isn't configured when run from Python (with os.system()) but works fine when pasted into command line","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am running Wing IDE 5 with Python 2.4. Everything was fine until I tried to debug and set a breakpoint. Arriving at the breakpoint I get an error message: \n\"The debug server encountered an error in probing locals or globals...\"\nAnd the Stack Data display looks like:\n    locals  \n    globals  \nI am not, to my knowledge, using a server client relationship or anything special, I am simply debugging a single threaded program running directly under the IDE. Anybody seen this or know how to fix it?\nWing IDE 5.0.9-1","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":239,"Q_Id":56615332,"Users Score":0,"Answer":"That's a pretty old version of Wing and likely a bug that's been fixed since then, so trying a newer version of Wing may solve it.\nHowever, if you are stuck with Python 2.4 then that's the latest that supports it (except that unofficially Wing 6 may work with Python 2.4 on Windows).  \nA work-around would be to inspect data from the Debug Probe and\/or Watch tools (both available in the Tools menu).\nAlso, Clear Stored Value Errors in the Debug menu may allow Wing to load the data in a later run if the problem doesn't reoccur.","Q_Score":1,"Tags":"python,debugging,wing-ide","A_Id":56631566,"CreationDate":"2019-06-16T01:10:00.000","Title":"Wing IDE The debug server encountered an error in probing locals","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Azure Datascience VM with Nvidia Gpu extension\nUbuntu 16.04.6 LTS\nPython 3.5.5\nNVCC V10.0.130\nTensorflow-gpu 1.13.1\n\nWhen runnning an op, I get\n\nE tensorflow\/stream_executor\/cuda\/cuda_driver.cc:300] failed call to\n  cuInit: CUDA_ERROR_NO_DEVICE: no CUDA-capable device is detected","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":101,"Q_Id":56642210,"Users Score":0,"Answer":"what is the size of the VM you are using on Azure ?","Q_Score":0,"Tags":"python,azure,tensorflow","A_Id":56644886,"CreationDate":"2019-06-18T05:24:00.000","Title":"Enabling Cuda on Azure Datascience VM","Data Science and Machine Learning":1,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I try to run the azure function app (Http Triggerd API) from my local (using VS code). But I'm getting an error \"port 7071 is unavailable. Close the process using that port, or specify another port using --port [-p].\" I checked the list of ports used using cmd prompt.But 7071 is not in used list. Also tried to run with different port using \"func host start --port [p1]\", but it throws the same error as above. For all ports it throws the same error. How to resolve this problem?","AnswerCount":8,"Available Count":4,"Score":0.0,"is_accepted":false,"ViewCount":10933,"Q_Id":56648386,"Users Score":0,"Answer":"On Windows, Adding ports in the Windows firewall rules solved the issue for me.","Q_Score":11,"Tags":"python-3.x,windows,azure,visual-studio-code,azure-functions","A_Id":59317367,"CreationDate":"2019-06-18T11:44:00.000","Title":"port 7071 is unavailable. Close the process using that port, or specify another port using --port [-p]","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I try to run the azure function app (Http Triggerd API) from my local (using VS code). But I'm getting an error \"port 7071 is unavailable. Close the process using that port, or specify another port using --port [-p].\" I checked the list of ports used using cmd prompt.But 7071 is not in used list. Also tried to run with different port using \"func host start --port [p1]\", but it throws the same error as above. For all ports it throws the same error. How to resolve this problem?","AnswerCount":8,"Available Count":4,"Score":1.2,"is_accepted":true,"ViewCount":10933,"Q_Id":56648386,"Users Score":0,"Answer":"Its due to the antivirus. After disabling the antivirus it works fine.","Q_Score":11,"Tags":"python-3.x,windows,azure,visual-studio-code,azure-functions","A_Id":56650533,"CreationDate":"2019-06-18T11:44:00.000","Title":"port 7071 is unavailable. Close the process using that port, or specify another port using --port [-p]","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I try to run the azure function app (Http Triggerd API) from my local (using VS code). But I'm getting an error \"port 7071 is unavailable. Close the process using that port, or specify another port using --port [-p].\" I checked the list of ports used using cmd prompt.But 7071 is not in used list. Also tried to run with different port using \"func host start --port [p1]\", but it throws the same error as above. For all ports it throws the same error. How to resolve this problem?","AnswerCount":8,"Available Count":4,"Score":0.0996679946,"is_accepted":false,"ViewCount":10933,"Q_Id":56648386,"Users Score":4,"Answer":"If running in development make sure you don't have another azure function sitting in debug mode. I was getting this error until I stopped the other function.","Q_Score":11,"Tags":"python-3.x,windows,azure,visual-studio-code,azure-functions","A_Id":59418734,"CreationDate":"2019-06-18T11:44:00.000","Title":"port 7071 is unavailable. Close the process using that port, or specify another port using --port [-p]","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I try to run the azure function app (Http Triggerd API) from my local (using VS code). But I'm getting an error \"port 7071 is unavailable. Close the process using that port, or specify another port using --port [-p].\" I checked the list of ports used using cmd prompt.But 7071 is not in used list. Also tried to run with different port using \"func host start --port [p1]\", but it throws the same error as above. For all ports it throws the same error. How to resolve this problem?","AnswerCount":8,"Available Count":4,"Score":0.0,"is_accepted":false,"ViewCount":10933,"Q_Id":56648386,"Users Score":0,"Answer":"Not sure why this resolved it for me, but I had to restart my machine then all was fine.","Q_Score":11,"Tags":"python-3.x,windows,azure,visual-studio-code,azure-functions","A_Id":66373054,"CreationDate":"2019-06-18T11:44:00.000","Title":"port 7071 is unavailable. Close the process using that port, or specify another port using --port [-p]","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"No Python at 'C:\\Users\\~~~~\\python.exe' error keeps coming out..\nEven if I deleted my previous python and path, the file location is where I installed my previous python...\nI want to use python in VS code and cmd on windows 10.\nWhat I tried to fix it\n\ndeleted python 3.7 version and reinstalled python 3.6 version.\nremoved previous python 3.7 path and added python 3.6 version reinstalled to the Windows Path variable. \nremove ';' on windows path variable.\nput ';' on windows path variable.\ndelete and reinstall python on vscode Extensions","AnswerCount":4,"Available Count":3,"Score":0.0,"is_accepted":false,"ViewCount":24740,"Q_Id":56731615,"Users Score":0,"Answer":"First of all, make sure you have installed correct bit version for your version 32\/64 bit...I would prefer to install python from Microsoft store...And restart VS Code...\nIf the error still exists try uninstalling and again installing Python extension for VS Code and restart VS Code...\nAnd you can even try to install python in the path it is searching for... And also add the path to the environmental variable...\nHope this might solve your problem...as it has done mine.","Q_Score":5,"Tags":"python,visual-studio-code,path,environment-variables,reinstall","A_Id":62848648,"CreationDate":"2019-06-24T07:22:00.000","Title":"No python at '\\python.exe'","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"No Python at 'C:\\Users\\~~~~\\python.exe' error keeps coming out..\nEven if I deleted my previous python and path, the file location is where I installed my previous python...\nI want to use python in VS code and cmd on windows 10.\nWhat I tried to fix it\n\ndeleted python 3.7 version and reinstalled python 3.6 version.\nremoved previous python 3.7 path and added python 3.6 version reinstalled to the Windows Path variable. \nremove ';' on windows path variable.\nput ';' on windows path variable.\ndelete and reinstall python on vscode Extensions","AnswerCount":4,"Available Count":3,"Score":0.0,"is_accepted":false,"ViewCount":24740,"Q_Id":56731615,"Users Score":0,"Answer":"The reason this happened to me was because I updated my python version. Therefore, the existing venv config was looking for an older python version. What I did was simply delete the existing virtual environment folder and created a new one.\nTo save all dependencies installed and transfer it into the new virtual environment, you can do the following:\n\npip freeze > requirements.txt to save dependencies into a text file\ndelete old venv folder\ncreate new venv folder\npip install requirements.txt","Q_Score":5,"Tags":"python,visual-studio-code,path,environment-variables,reinstall","A_Id":70286020,"CreationDate":"2019-06-24T07:22:00.000","Title":"No python at '\\python.exe'","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"No Python at 'C:\\Users\\~~~~\\python.exe' error keeps coming out..\nEven if I deleted my previous python and path, the file location is where I installed my previous python...\nI want to use python in VS code and cmd on windows 10.\nWhat I tried to fix it\n\ndeleted python 3.7 version and reinstalled python 3.6 version.\nremoved previous python 3.7 path and added python 3.6 version reinstalled to the Windows Path variable. \nremove ';' on windows path variable.\nput ';' on windows path variable.\ndelete and reinstall python on vscode Extensions","AnswerCount":4,"Available Count":3,"Score":1.0,"is_accepted":false,"ViewCount":24740,"Q_Id":56731615,"Users Score":15,"Answer":"If you use venv, then look in that file:\npyvenv.cfg","Q_Score":5,"Tags":"python,visual-studio-code,path,environment-variables,reinstall","A_Id":60267895,"CreationDate":"2019-06-24T07:22:00.000","Title":"No python at '\\python.exe'","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"The following code snippet transforms a text file into another text file, but with separators added after the specified field widths.\ngawk 'BEGIN{FIELDWIDTHS=\"1 26 1 26 26 26 26 18 2 5 4 7 10 16 4 4 10 2 6 1 1 1 1 10 10 4 11 3 1 1 2 10 10 10 1 1 10 20 10 1 1 1 1 15 16 10 50 13 1 60\"}{print $1 \"|\" $2 \"|\" $3 \"|\" $4 \"|\" $5 \"|\" $6 \"|\" $7 \"|\" $8 \"|\" $9 \"|\" $10 \"|\" $11 \"|\" $12 \"|\" $13 \"|\" $14 \"|\" $15 \"|\" $16 \"|\" $17 \"|\" $18 \"|\" $19 \"|\" $20 \"|\" $21 \"|\" $22 \"|\" $23 \"|\" $24 \"|\" $25 \"|\" $26 \"|\" $27 \"|\" $28 \"|\" $29 \"|\" $30 \"|\" $31 \"|\" $32 \"|\" $33 \"|\" $34 \"|\" $35 \"|\" $36 \"|\" $37 \"|\" $38 \"|\" $39 \"|\" $40 \"|\" $41 \"|\" $42 \"|\" $43 \"|\" $44 \"|\" $45 \"|\" $46 \"|\" $47 \"|\" $48 \"|\" $49 \"|\" $50}' \nI have a few ways in mind as to how it can be converted to python, but I need a direction I should head to. Thanks in advance!","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":100,"Q_Id":56743969,"Users Score":0,"Answer":"The following function does the same thing as the gawk snippet does- \ndef chunkstring(string, lengths):\n        return (string[pos:pos+length]\n        for idx,length in enumerate(lengths)\n        for pos in [sum(map(int, lengths[:idx]))])\ncolumn_lengths = [1,26,1,26,26,26,26,18,2,5,4,7,10,16,4,4,10,2,6,1,1,1,1,10,10,4,11,3,1,1,2,10,10,10,1,1,10,20,10,1,1,1,1,15,16,10,50,13,1,60]","Q_Score":0,"Tags":"python,python-3.x,text,awk,text-processing","A_Id":56756329,"CreationDate":"2019-06-24T21:08:00.000","Title":"Converting a text processing code written in awk to python?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I've set up python3.6 on new server and defualt python version of it is 2.7.\nand I want to use command \"python3\" instead of \"\/usr\/local\/bin\/python3.6\"\npython2.7 should be stayed as the default version, I just want to utilize \"python3\" command. \nAm I supposed to do use Symbolic link or alias? \nIs it ok if I'll create virtual envs?\nI apologize for my dump question, and I appreciate your help in advance.","AnswerCount":4,"Available Count":2,"Score":0.049958375,"is_accepted":false,"ViewCount":6542,"Q_Id":56749058,"Users Score":1,"Answer":"You can use alias for this. \ni.e. alias python3=\/usr\/local\/bin\/python3.6 and put it to your ~\/.bashrc file.\nRun source ~\/.bashrc to get the change.","Q_Score":0,"Tags":"python,python-3.x,redhat","A_Id":56749888,"CreationDate":"2019-06-25T07:38:00.000","Title":"How to use command \"python3\" to execute \"\/usr\/local\/bin\/python3.6","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I've set up python3.6 on new server and defualt python version of it is 2.7.\nand I want to use command \"python3\" instead of \"\/usr\/local\/bin\/python3.6\"\npython2.7 should be stayed as the default version, I just want to utilize \"python3\" command. \nAm I supposed to do use Symbolic link or alias? \nIs it ok if I'll create virtual envs?\nI apologize for my dump question, and I appreciate your help in advance.","AnswerCount":4,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":6542,"Q_Id":56749058,"Users Score":0,"Answer":"Check if \/usr\/local\/bin\/ is in your PATH (echo $PATH).\nIf not, add it (export PATH=$PATH:\/usr\/local\/bin\/) in your ~\/.bashrc.\nRestart the shell or source ~\/.bashrc","Q_Score":0,"Tags":"python,python-3.x,redhat","A_Id":56749129,"CreationDate":"2019-06-25T07:38:00.000","Title":"How to use command \"python3\" to execute \"\/usr\/local\/bin\/python3.6","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm using this code os.system(\"dcapgen.exe C:\\\\Users\\\\folder\\\\a.dcap\") in my python script to run this command dcapgen.exe C:\\Users\\folder\\a.dcap. This command generates .txt file in its current directory. I want to use this generated .txt file further in my code. How to do this? I don't want command log output. Thanks!\nI'm new to python programming.","AnswerCount":4,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":63,"Q_Id":56752021,"Users Score":0,"Answer":"This cannot be done because .txt file that will be generated is not getting traced in command prompt. we can only get cmd log output using subprocess which is being suggested by other answers. so, we can get access to the generated file by using its path and full name which we know because its naming follows some pattern and location is fixed, like this\ngenerated_text_file = original_file_name+\"_some_addition.txt\"\n with open(generated_text_file, 'r') as file1:\n s = file1.read().replace('\/n','')","Q_Score":0,"Tags":"python","A_Id":56805693,"CreationDate":"2019-06-25T10:32:00.000","Title":"How to get command prompt output which is in the form of .txt inside a python script?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm installing Anaconda and a bunch of packages on a lot of MacBooks for an upcoming class. I'm about halfway through all the machines and just learned I've been installing Anaconda and all of the packages on the Administrator account when I should have been installing it on the regular user account. Conda commands work just fine on the admin account, but when I type \"conda list\" or \"conda --version\" on the regular user account that it needs to work on, I get:\n-bash: conda: command not found\nHow do I enable anaconda commands on another user account? Thanks!\nI have already tried a bunch of things to do with .bash_profile but frankly, I have no idea what I'm doing with those.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":52,"Q_Id":56757212,"Users Score":0,"Answer":"If I remember correctly when I installed anaconda there was an option to install for all users or just the logged in profile","Q_Score":0,"Tags":"python,macos,anaconda","A_Id":56757370,"CreationDate":"2019-06-25T15:14:00.000","Title":"How to enable conda commands on another user profile on MacOS?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have the following line of commands used in sequence from the command window. \ncd path 1 && file.bat && cd path 2 && printfNav path3 > Testing.txt\nIs it possible to have this done through python?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":116,"Q_Id":56759051,"Users Score":0,"Answer":"You are looking for the os.system() method. You will need to import os into your python program and then using this method you can send commands to the terminal. The method takes in a string and acts as if you typed that into your terminal. For example os.system('pwd') would cause the terminal to print out your current working directory, and so on so forth with other commands.","Q_Score":0,"Tags":"python","A_Id":56759180,"CreationDate":"2019-06-25T17:16:00.000","Title":"Is there a way to run several consecutive lines in the system command window using python","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am working on a web scraping project using python and an API\nI want the python script to be ran everyday for 5 days for 12 hours as a job\nI don't want to keep my system alive to either do it in CMD or in Jupyter so I was looking for a solution wherein any cloud service would help me automate the process","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":58,"Q_Id":56762429,"Users Score":0,"Answer":"One way to do this would be to write a web scraper in Python, and run it on an AWS Lambda, which is essentially a serverless function with no underlying ops to manage. Depending on your use case, you could either perform some action based on the contents of that page data, or you could write the result out to S3 as a file.\nTo have your function execute in a recurring fashion, you can then set your AWS Lambda event trigger to be a CloudWatch event (in this case, some recurring timer at whatever frequencies\/times you'd like, such as once each hour for a 12 hour window during Mon-Fri). \nThis is typically going to be an easier approach when compared to spinning up a virtual server (EC2 instance), and managing a persistent process that could error during waits\/operation for any number of reasons.","Q_Score":0,"Tags":"python,amazon-web-services,google-cloud-platform,automation","A_Id":56762555,"CreationDate":"2019-06-25T21:44:00.000","Title":"How do I run a python code on a cloud service to automate it's run for 5 days","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":1},{"Question":"I'm trying to use PyAV to output video to a V4l2 loopback device (\/dev\/video1), but I can't figure out how to do it. It uses the avformat_write_header() from libav* (ffmpeg bindings).\nI've been able to get ffmpeg to output to the v4l2 device from the CLI but not from python.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":409,"Q_Id":56766273,"Users Score":0,"Answer":"Found the solution. The way to do this is:\n\nSet the container format to v4l2\nSet the stream format as \"rawvideo\"\nSet the framerate (if it's a live stream, set the framerate to 1 fps higher than the stream is so that you don't get an error)\nSet pixel format to either RGB24 or YUV420","Q_Score":0,"Tags":"python,ffmpeg,v4l2","A_Id":56783972,"CreationDate":"2019-06-26T06:12:00.000","Title":"How can I output to a v4l2 driver using FFMPEG's avformat_write_header?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I recently uninstalled and reinstalled python, and i have not been able to save one of my programs since.\nWhen i hit ctrl+S, IDLE throws me a window saying I\/O Error: Bad file descriptor. I can not even save my file!\nAs it turns out i don't think it has anything to do with the actual code. No matter what is in the program, it still throws this error when i try to save, unless there is no code whatsoever!\nIF anyone knows why this error is occurring, please tell me or post an updated version of the code, any help is appreciated\nI am using Windows 10, Python 3.7.3 64-bit [a couple days ago i uninstalled (just through windows settings) 32-bit and installed 64 from the python website]","AnswerCount":2,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":1060,"Q_Id":56780131,"Users Score":1,"Answer":"In Windows, it is theorically possible to install 32 bits and 64 bits versions of Python side by side, and it should work with a genuine installation. But dragons are waiting around: \n\nit is possible to have shortcuts pointing to a wrong location.\nif the PATH has been changed to allow direct usage of the python, or pip command from the command line, risk is that you use the wrong tool\nif any Python environment variable has been set, problems are almost guaranteed\n\nFurthermore, Python can be installed either for the current user or for all users, which adds more possibilities for inconsistancies.\nOnce an installation is deemed broken, uninstalling one of the versions is generally useless on can even cause more problems. Long story short, if you have entered the world of inconsistancy, you must clean up everything.\nMy advice here is:\n\nfind where the Python versions were installed and note it\nfind if additional tools (py) have been installed and try to find which ones\nuninstall every Python version\ncontrol that the installation paths are empty\nsearch the environment and PATH for any Python related information and remove them\n\nWhen everything looks good, reinstall from the installation wizard.\nHopefully it should work. If it does not I cannot help: despite being presented as an end user friendly system, Windows is a very feature rich and complex OS and trying to fully analyze a Windows system is beyond the capacity of most users, including most power users and sysadmins. At a point, the only possibility left is to reinstall the full OS and then cleanly install everything back... when it is possible...","Q_Score":0,"Tags":"python,python-3.x,file,python-idle","A_Id":56793925,"CreationDate":"2019-06-26T20:05:00.000","Title":"I\/O Error: Bad File Descriptor, can not save python file","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I recently uninstalled and reinstalled python, and i have not been able to save one of my programs since.\nWhen i hit ctrl+S, IDLE throws me a window saying I\/O Error: Bad file descriptor. I can not even save my file!\nAs it turns out i don't think it has anything to do with the actual code. No matter what is in the program, it still throws this error when i try to save, unless there is no code whatsoever!\nIF anyone knows why this error is occurring, please tell me or post an updated version of the code, any help is appreciated\nI am using Windows 10, Python 3.7.3 64-bit [a couple days ago i uninstalled (just through windows settings) 32-bit and installed 64 from the python website]","AnswerCount":2,"Available Count":2,"Score":0.0996679946,"is_accepted":false,"ViewCount":1060,"Q_Id":56780131,"Users Score":1,"Answer":"I have experienced the same issue.\nIn my case the Windows 10 Defender was the root cause.\nI added in Windows Defender Ransomware Protection the python.exe of my used IDE and the issue disappears.","Q_Score":0,"Tags":"python,python-3.x,file,python-idle","A_Id":67860858,"CreationDate":"2019-06-26T20:05:00.000","Title":"I\/O Error: Bad File Descriptor, can not save python file","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Lest I reinvent the wheel .... again:\nIs there a python interface, API or module for the standard linux \"at\" task scheduler? I have tried searching the internet but searching for the word \"at\" is a tad bit useless :-)\nMy intention is to have a python script process same data and construct a shell file. Then use a subprocess call to have \"at\" schedule the job file for a specific date and time. I will have a similar function using \"Schtasks.exe\" if python detects it is running on windows. Lastly the python script exits ... leaving system scheduler the responsibility of running the job file.\nupdate 1 July 2019:\nFound an interesting \"at\" quirk.\nThe file called on the \"at\" command line (i.e. the script or shell file) does not need to be marked as \"executable\" in order to be run by \"at\".\nFor the record: I am running Linux Mint 19.1","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":113,"Q_Id":56780449,"Users Score":1,"Answer":"You can achieve this with different approach:\n\nWrite your python script. \nCall this script with a bash file.\nSchedule bash file with a crontab task.","Q_Score":3,"Tags":"python,schedule,at-job","A_Id":56780556,"CreationDate":"2019-06-26T20:31:00.000","Title":"Is there a python module for the Linux \"at\" task scheduler","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a python loop that at each iteration is creating a new image in a new path. I want to send that path into a process previously executed that is waiting for a path at the command prompt.\nIn more detail:\nI am running a self-driving simulator in python and every 5 frames I want to test that current frame (that is saved in a RAM disk) into an object detector algorithm I have trained (that spends arround 9ms to detect my object BUT 2 seconds to open the process). Actually, I execute the trained algorithm by using the subprocess module, but the problem I have is that when that process is opened (I just open the process once, when I run the main script) it is waiting for a path image. I believe that with your tips I am close to the answer but I don't face how to pass that path image to this subprocess that is waiting for it at each 5 frames iteration. \nPD: I am on Windows, Python 3.5.4\nDo you know what can I do?","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":309,"Q_Id":56810924,"Users Score":0,"Answer":"Thank you for all your comments and for your help. Finally I have achieved it.\nI use the library 'pexpect' that allows to launch a program inside a python script with the function process = popen_spawn.PopenSpawn. Then, a function from that library called 'send' allows to pass an argument to that running process (process.send(arg)). \nIn my case, I launch the program (.exe) at the beginning of the script defining that instance as a global variable. Then I just have to execute the send function at each iteration.","Q_Score":1,"Tags":"python","A_Id":56827837,"CreationDate":"2019-06-28T17:17:00.000","Title":"How can I pass a python variable to a process in the command prompt","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have been trying to install Quandl and have been running into some issues. I used the Command Prompt and entered in my Python Path but it seems like the Command prompt just reads the input and proceeds to skip a line and does not install Quandl.\nPlease advise. Beyond that too, I am having a hard time getting my Anaconda to run. I think I might have messed up the installation process. I am using Enthought Canopy but my preference is more geared towards Anaconda. Is there a way to completely wipe out Anaconda from the computer and start clean?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":26,"Q_Id":56814901,"Users Score":0,"Answer":"You might want to use a VirtualEnv for your Python project.  This will allow you to define your package library requirements in a requirements.txt file.  \nYou would add the word quandl in this file, then activate the VirtualEnv and run pip install -r requirements.txt.  At this point you should be able to have the library available to the VirtualEnv.","Q_Score":0,"Tags":"python,quandl","A_Id":56814941,"CreationDate":"2019-06-29T03:36:00.000","Title":"Having a hard time installing Quandl","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm trying to setup a server to run on startup (Raspberry Pi) - the server calls a script which calls a script...except they're not firing.\n\nadd the cron job using crontab -e and writing @reboot python3 \/path\/to\/my_server.py (also tested with & at end of line)...this works fine.\nmy_server.py uses httpd.server_forever() to listen at a few endpoints...this works fine.\nOne of the server endpoints runs subprocess.Popen(['python3', '\/path\/to\/my_script.py']).\nmy_script.py then runs subprocess.Popen(['qgis']) (also tried with shell=True).\n\nHowever, QGIS isn't starting.\nThis is only happening when trying to run everything on boot with the cron job. If I manually open a terminal and run python3 \/path\/to\/my_server.py then everything works as expected. I'm thinking it has to do with...things not being run in a shell\/terminal - maybe a behavior of Popen?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":82,"Q_Id":56816358,"Users Score":0,"Answer":"The issue is that QGIS requires x server to be running, and cron won't have that by default.\nFix: change cron entry to be @reboot export DISPLAY=:0; python3 \/path\/to\/my_server.py and everything works!","Q_Score":0,"Tags":"python,shell,cron,subprocess,qgis","A_Id":56821316,"CreationDate":"2019-06-29T09:07:00.000","Title":"Python subprocess.popen from within a cron job","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm trying to make a temporary table a create on pyspark available via Thrift. My final goal is to be able to access that from a database client like DBeaver using JDBC.\nI'm testing first using beeline.\nThis is what i'm doing.\n\nStarted a cluster with one worker in my own machine using docker and added spark.sql.hive.thriftServer.singleSession true on spark-defaults.conf\nStarted Pyspark shell (for testing sake) and ran the following code:\nfrom pyspark.sql import Row\nl = [('Ankit',25),('Jalfaizy',22),('saurabh',20),('Bala',26)]\nrdd = sc.parallelize(l)\npeople = rdd.map(lambda x: Row(name=x[0], age=int(x[1])))\npeople = people.toDF().cache()\npeebs = people.createOrReplaceTempView('peebs')\nresult = sqlContext.sql('select * from peebs')\nSo far so good, everything works fine.\nOn a different terminal I initialize spark thrift server:\n.\/sbin\/start-thriftserver.sh   --hiveconf hive.server2.thrift.port=10001 --conf spark.executor.cores=1 --master spark:\/\/172.18.0.2:7077\nThe server appears to start normally and I'm able to see both pyspark and thrift server jobs running on my spark cluster master UI.\nI then connect to the cluster using beeline\n.\/bin\/beeline\nbeeline> !connect jdbc:hive2:\/\/172.18.0.2:10001\nThis is what I got\n\nConnecting to jdbc:hive2:\/\/172.18.0.2:10001\n  Enter username for jdbc:hive2:\/\/172.18.0.2:10001: \n  Enter password for jdbc:hive2:\/\/172.18.0.2:10001: \n  2019-06-29 20:14:25 INFO  Utils:310 - Supplied authorities: 172.18.0.2:10001\n  2019-06-29 20:14:25 INFO  Utils:397 - Resolved authority: 172.18.0.2:10001\n  2019-06-29 20:14:25 INFO  HiveConnection:203 - Will try to open client transport with JDBC Uri: jdbc:hive2:\/\/172.18.0.2:10001\n  Connected to: Spark SQL (version 2.3.3)\n  Driver: Hive JDBC (version 1.2.1.spark2)\n  Transaction isolation: TRANSACTION_REPEATABLE_READ\n\nSeems to be ok.\nWhen I list show tables; I can't see anything.\n\nTwo interesting things I'd like to highlight is:\n\nWhen I start pyspark I get these warnings\n\nWARN  ObjectStore:6666 - Version information not found in metastore. hive.metastore.schema.verification is not enabled so recording the schema version 1.2.0\nWARN  ObjectStore:568 - Failed to get database default, returning NoSuchObjectException\nWARN  ObjectStore:568 - Failed to get database global_temp, returning NoSuchObjectException\n\nWhen I start the thrift server I get these:\n\nrsync from spark:\/\/172.18.0.2:7077\n  ssh: Could not resolve hostname spark: Name or service not known\n  rsync: connection unexpectedly closed (0 bytes received so far) [Receiver]\n  rsync error: unexplained error (code 255) at io.c(235) [Receiver=3.1.2]\n  starting org.apache.spark.sql.hive.thriftserver.HiveThriftServer2, logging to ...\n\n\nI've been through several posts and discussions. I see people saying we can't have temporary tables exposed via thrift unless you start the server from within the same code. If that's true how can I do that in python (pyspark)?\nThanks","AnswerCount":3,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":1684,"Q_Id":56820752,"Users Score":0,"Answer":"createOrReplaceTempView creates an in-memory table. The Spark thrift server needs to be started on the same driver JVM where we created the in-memory table.\nIn the above example, the driver on which the table is created and the driver running STS(Spark Thrift server) are different.\nTwo options\n1. Create the table using createOrReplaceTempView in the same JVM where the STS is started.\n2. Use a backing metastore, and create tables using org.apache.spark.sql.DataFrameWriter#saveAsTable so that tables are accessible independent of the JVM(in fact without any Spark driver.   \nRegarding the errors:\n1. Relates to client and server metastore version.\n2. Seems like some rsync script trying to decode spark:\\\\ url\nBoth doesnt seems to be related to the issue.","Q_Score":1,"Tags":"python,apache-spark,pyspark,thrift,spark-thriftserver","A_Id":56824231,"CreationDate":"2019-06-29T20:41:00.000","Title":"How to view pyspark temporary tables on Thrift server?","Data Science and Machine Learning":0,"Database and SQL":1,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm running an Azure function in Azure, the function gets triggered by a file being uploaded to blob storage container. The function detects the new blob (file) but then outputs the following message - Did not find any initialized language workers.\nSetup:\n\nAzure function using Python 3.6.8\nRunning on linux machine\nBuilt and deployed using azure devops (for ci\/cd capability)\nBlob Trigger Function\n\nI have run the code locally using the same blob storage container, the same configuration values and the local instance of the azure function works as expected.\nThe functions core purpose is to read in the .xml file uploaded into blob storage container and parse and transform the data in the xml to be stored as Json in cosmos db.\nI expect the process to complete like on my local instance with my documents in cosmos db, but it looks like the function doesn't actually get to process anything due to the following error:\nDid not find any initialized language workers","AnswerCount":5,"Available Count":3,"Score":0.0399786803,"is_accepted":false,"ViewCount":11078,"Q_Id":56832315,"Users Score":1,"Answer":"This is due to SDK version, I would suggest to deploy fresh function App in Azure and deploy your code there. 2 things to check :\n\nMake sure your local function app SDK version matches with Azure function app.\nCheck python version both side.","Q_Score":30,"Tags":"python-3.x,azure,azure-functions","A_Id":62908637,"CreationDate":"2019-07-01T08:28:00.000","Title":"Azure function - \"Did not find any initialized language workers\"","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm running an Azure function in Azure, the function gets triggered by a file being uploaded to blob storage container. The function detects the new blob (file) but then outputs the following message - Did not find any initialized language workers.\nSetup:\n\nAzure function using Python 3.6.8\nRunning on linux machine\nBuilt and deployed using azure devops (for ci\/cd capability)\nBlob Trigger Function\n\nI have run the code locally using the same blob storage container, the same configuration values and the local instance of the azure function works as expected.\nThe functions core purpose is to read in the .xml file uploaded into blob storage container and parse and transform the data in the xml to be stored as Json in cosmos db.\nI expect the process to complete like on my local instance with my documents in cosmos db, but it looks like the function doesn't actually get to process anything due to the following error:\nDid not find any initialized language workers","AnswerCount":5,"Available Count":3,"Score":0.0798297691,"is_accepted":false,"ViewCount":11078,"Q_Id":56832315,"Users Score":2,"Answer":"Same error but different technology, environment, and root cause.\nTechnology Net 5, target system windows. In my case, I was using dependency injection to add a few services, I was getting one parameter from the environment variables inside the .ConfigureServices() section, but when I deployed I forget to add the variable to the application settings in azure, because of that I was getting this weird error.","Q_Score":30,"Tags":"python-3.x,azure,azure-functions","A_Id":70135039,"CreationDate":"2019-07-01T08:28:00.000","Title":"Azure function - \"Did not find any initialized language workers\"","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm running an Azure function in Azure, the function gets triggered by a file being uploaded to blob storage container. The function detects the new blob (file) but then outputs the following message - Did not find any initialized language workers.\nSetup:\n\nAzure function using Python 3.6.8\nRunning on linux machine\nBuilt and deployed using azure devops (for ci\/cd capability)\nBlob Trigger Function\n\nI have run the code locally using the same blob storage container, the same configuration values and the local instance of the azure function works as expected.\nThe functions core purpose is to read in the .xml file uploaded into blob storage container and parse and transform the data in the xml to be stored as Json in cosmos db.\nI expect the process to complete like on my local instance with my documents in cosmos db, but it looks like the function doesn't actually get to process anything due to the following error:\nDid not find any initialized language workers","AnswerCount":5,"Available Count":3,"Score":0.0,"is_accepted":false,"ViewCount":11078,"Q_Id":56832315,"Users Score":0,"Answer":"Took me a while to find the cause as well, but it was related to me installing a version of protobuf explicitly which conflicted with what was used by Azure Functions. Fair, there was a warning about that in the docs. How I found it: went to <your app name>.scm.azurewebsites.net\/api\/logstream and looked for any errors I could find.","Q_Score":30,"Tags":"python-3.x,azure,azure-functions","A_Id":70363312,"CreationDate":"2019-07-01T08:28:00.000","Title":"Azure function - \"Did not find any initialized language workers\"","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"So, I'm writing a script to take a certain dataset, sample it 100 times using different random seeds, completing all these datasets and then getting the mean error. However, whenever I try to run the script I end up with the error OSError: [Errno 24] Too many open files\nI don't understand what I can do to fix this (if I should do something in the script or in to the system and what). I'm using Python 3 with macOS Mojave. Anybody has a clue?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":9162,"Q_Id":56843659,"Users Score":11,"Answer":"The number of open files you're allowed can be increased by using ulimit e.g. in bash you could do:\nulimit -n\nThis will probably print out 256 meaning that at one time a maximum of 256 file descriptors are allowed to be open.\nIncrease the limit:\nulimit -n 30000 # 30,000 open files allowed\nThis sort of thing is generally done on systems running something like server programs that need a file descriptor (a socket descriptor) for each concurrent connection being handled.\nHowever, if you post the code there might be another way to fix this. It doesn't sound like you want\/need multiple file descriptors open at the same time.","Q_Score":9,"Tags":"python,python-3.x,macos-mojave","A_Id":56843690,"CreationDate":"2019-07-01T23:39:00.000","Title":"OSError: [Errno 24] Too many open files - OS Mojave","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm new to asynchronous tasks and I'm using django-celery and was hoping to use django-celery-beat to schedule periodic tasks.\nHowever it looks like celery-beat doesn't pick up one-off tasks. Do I need two Celery instances, one as a worker for one off tasks and one as beat for scheduled tasks for this to work?","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":1283,"Q_Id":56897657,"Users Score":0,"Answer":"Pass -B parameter to your worker, it is a parameter to run beat schedule. This worker will do all other tasks, the ones sent from beat, and the \"one-off\" ones, it really doesn't matter for worker.\nSo the full command looks like:\ncelery -A flock.celery worker -l DEBUG -BE.","Q_Score":1,"Tags":"python,django,celery,django-celery","A_Id":62809186,"CreationDate":"2019-07-05T06:31:00.000","Title":"Django Celery & Django-Celery-Beat","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"sshpass -P mysshpass ssh root@127.0.0.1 \".\/myscript.py\"\nAbove is the command that I execute from shell, it asks me for a password as \"myscript.py\" is scripted to ask for it. But when I execute the same command from python, it doesn't prompt me for password. \nmy python code\nos.system(sshpass -P mysshpass ssh root@127.0.0.1 \".\/myscript.py\")","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":92,"Q_Id":56899164,"Users Score":0,"Answer":"you might consider paramiko module, or by specifiying a key file (rsa private key) with ssh -i (see authorized_keys if you are not familiar with ssh auth","Q_Score":0,"Tags":"python","A_Id":56899185,"CreationDate":"2019-07-05T08:15:00.000","Title":"How to provide a password over ssh using python script?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I need to transform an .ui archive to a .py but I can't use the command pyuic4, it said command not found in the terminal. \nI already try installing pyside, pyqt, use uic.py but nothing seems to work.","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":1336,"Q_Id":56906241,"Users Score":1,"Answer":"So, I finally solved it. I used pyuic5 -x Data.ui -o Data_ui.py in the terminal, but first I opened the folder where the executable pyuic5 was, paste Data.ui and then use the line pyuic5 -x Data.ui -o Data_ui .py. Remember to open the location of the executable in the terminal before using the command","Q_Score":0,"Tags":"python,pyqt","A_Id":56996435,"CreationDate":"2019-07-05T16:01:00.000","Title":"How to transform a .ui to a .py on mac","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I recently started used Atom IDE. It feels good. The only thing that I find difficult is to setup a project profile to run. In pycharm there is Run configuration, is there something similar to it in Atom ?\nI have a project with multiple classes. When ever I want to run my script,I have to go to the main.py to launch 'ctrl + i'.\nCould any one help me to setup the project in a such a way, when I execute 'ctrl + i' it automatically launch's main.py instead of the py file I am calling from.","AnswerCount":2,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":811,"Q_Id":56913965,"Users Score":1,"Answer":"In the top bar, under \"packages\", go to \"script\", and select \"configure script\".\nThere put in the directory in which the program is, what command to run (python3 main.py), and select \"save as profile.\" The window explains itself.\nThen, you should be able to run from that profile with Alt+Ctrl+Shift+B, from whatever tab you're on.","Q_Score":0,"Tags":"python-3.x,ide,atom-editor","A_Id":56914347,"CreationDate":"2019-07-06T12:10:00.000","Title":"How to configure Atom script to run main.py","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I've downloaded python 3 from their website. When I do 'python --version' in terminal it says I'm on Python 2.7.10.  How do I update it to what I just installed?","AnswerCount":1,"Available Count":1,"Score":0.537049567,"is_accepted":false,"ViewCount":2018,"Q_Id":56917609,"Users Score":3,"Answer":"Have you tried using 'python3 --version'? To use python 3 you have to be explicit and type python3 in the command line.","Q_Score":0,"Tags":"python,macos,terminal","A_Id":56917626,"CreationDate":"2019-07-06T20:56:00.000","Title":"How to update from python 2 to python 3 in terminal on Mac","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Container 1 : I have a docker container which is spawned by a Dockerfile image that i built serving Python dependencies to a specific use-case. This container is mount to my file system project directory to \/source directory in the Docker container.\nContainer 2 : Another container contains Jupyter notebook and it is only configured to use Jupyter notebook.\nI don't use Jupyter notebook all the time for Python developement, i use my code editor instead. I just want an easier way to mount Jupyter notebook when i want to and edit my project files. \nNow, can i mount Container-2 to Container-1 such that contents in the \/source directory in Container-1 is persisted to my project directory while enabling Container-1 and Conatiner-2 to take up a shared space? In my case i want Container-1 to be mount to my file system to \/source and I want the Jupyter Notebook, running in Container-2 to be able to edit files inside the \/source directory in Container-1.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":113,"Q_Id":56921877,"Users Score":0,"Answer":"if I'm understanding correctly, what you are trying to do is using one container installed libs in another container\nI think that this approach is bad, since there might be some problems with OS level dependencies that are missing. The first possible solution is installing the dependencies in both containers, or at least using the 1st docker image as base to the 2nd\nIf you yet rather doing it your way, you can try mounting volume between the 1st container virtual env \/ site-packages with the 2nd","Q_Score":0,"Tags":"python-3.x,docker,jupyter-notebook,docker-machine","A_Id":56922114,"CreationDate":"2019-07-07T11:45:00.000","Title":"How to connect two containers when one of the container is mount to the filesystem?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am running Windows 10. I have recently changed location to my python folder and interpreter. \nUnfortunately, when i now run python scripts in command prompt, I always have to type \"python\" before the name of the script I want to run.\nRunning the script directly - for example: C:\\Python 37\\mypythonscript.py -generates absolutely no reaction from the command prompt. I simply get back directly to C:\\Python37> \nIf I however run C:\\Python 37\\python mypythonscript.py, the script is properly executed. \nI have changed all the file associations using \"ftype\" and \"assoc\" in the command prompt. When I start command prompt and type \"python\", the python compiler correctly starts. \nMy problem is that I always have to type \"python\" before the name of my script for the command prompt to recognize that it needs to execute python. \nI would like to open command, change directory to the directory with my python scripts, and simply run the python scripts by running the name of the scripts (mypythonscript.py) without having to type \"python\" in front of it.\nCould you please help me identify what is wrong? How can I once again run python scripts in the command prompt without having to type \"python\" in front of the script's name?\nThank you in advance.","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":2618,"Q_Id":56939420,"Users Score":1,"Answer":"If you use a python 3 Virtualenv in powershell the above problem can be very confusing. Typically \"py .\\yourscript.py\" or \"py .\\yourscript\" will work but \".\\yourscript.py\" or \".\\yourscript\" will fail and might return a \"ModuleNotFoundError: No module named '<module>' \" error.\nThis happens because your .py association is not correct as described by Eryk Sun in the above second remark. The \"py launcher\" he names is, in most cases, \"C:\\Windows\\py.exe\". I my case it was already installed and I just needed to adjust the .py extension as described by him. It can also be done via the \"Choose default apps by file type\" settings.\nA useful help is to define \"$env:PYLAUNCH_DEBUG=1\" in your powershell. After that \"py .\\yourscript.py\" will have extra output showing where your python executable is found.\nIf there is no extra output it means, as before, that you don't have \".py\" associated with \"py.exe\". If you start a \"cmd\" and \"ftype python.file\" looks ok, you need to read Eryk Sun's first remark :-)","Q_Score":1,"Tags":"python,windows,associations","A_Id":60347308,"CreationDate":"2019-07-08T16:50:00.000","Title":"Python file association not working in Windows 10","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to remotely stream videos and images from the cameras of the Pepper and NAO robots to my laptop. \nFirst, I used a while loop to repeatedly capture images from the NAO's camera and processed the images through opencv. However, as you can imagine, this only provided me with a framerate of about 1 fps. \nThen I tried to access the camera through opencv's videocapture, but it is not working properly. \nNext, I attempted to use gstreamer 1.0 for python on Windows, but the Windows version seems to be missing a number of elements, even though I have all of the required plugins (base, good, bad, ugly). \nAlso, I am trying to avoid using ROS because I am having issues using it with the python 2.7 naoqi SDK of the Pepper and NAO robots. \nAny help would be greatly appreciated. Thanks","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":1257,"Q_Id":56940339,"Users Score":2,"Answer":"gstreamer should already be installed on the robot, so you could run it on the robot with a command like this:\n\ngst-launch-0.10 -v v4l2src device=\/dev\/video-top ! video\/x-raw-yuv,width=640,height=480,framerate=30\/1 ! ffmpegcolorspace ! jpegenc ! multipartmux! tcpserversink port=3000 \n\n... and then you can open the stream from your computer, for example with vlc:\n\nvlc tcp:\/\/ip.of.the.robot:3000","Q_Score":2,"Tags":"python,opencv,gstreamer,nao-robot,pepper","A_Id":56952479,"CreationDate":"2019-07-08T18:02:00.000","Title":"Remote video streaming with Pepper and NAO robots","Data Science and Machine Learning":1,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I currently have a docker-compose.yml file that builds two Dockerfiles. One docker file pulls Python and the other pulls Ubuntu . At the end, I have two containers named dataload_py and dataload_ubuntu. I mounted a file onto dataload_ubuntu that can only be ran on that container.\nWhen I bash into the Python container using docker exec -it dataload_py bash, how can I execute the mounted file on the Ubuntu container? They are bridged through the same network.\nMy end goal is to be able to spin up a Docker container with both Python and Ubuntu .","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":396,"Q_Id":56941164,"Users Score":0,"Answer":"Maybe you can have one container instead of two. Your Dockerfile will pull from Ubuntu 18 and then in the Dockerfile, you can install python 3.7.3, this way you will only have one cointainer with both ubuntu and python and you can execute your script there","Q_Score":0,"Tags":"python,docker,docker-compose,dockerfile,ubuntu-18.04","A_Id":56941477,"CreationDate":"2019-07-08T19:07:00.000","Title":"Is it possible to build a docker container with two hub images (Python 3.7.3 and Ubuntu 18.0.4)?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I know it is possible to fetch then use checkout with the path\/to\/file to download that specific file.\nMy issue is that I have a 1 MB data cap per day and git fetch will download all the data anyway even if it does not save them to disc until I use git checkout. I still used my data\nIs my understanding of how git fetch\/checkout correct? is there a way to download a specific file only to see if there is a new version before proceeding with the download.","AnswerCount":4,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":28491,"Q_Id":56943327,"Users Score":0,"Answer":"This works for me on a local gitlab:\ncurl http:\/\/mylocalgitlab\/MYGROUP\/-\/raw\/master\/PATH\/TO\/FILE.EXT -o FILE.EXT","Q_Score":14,"Tags":"python,linux,git","A_Id":70557243,"CreationDate":"2019-07-08T22:39:00.000","Title":"How to download a single file from GitLab?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Backstory: I was running an Airflow job on a daily schedule, with a start_date of July 1, 2019. The job gathered requested each day's data from a third party, then loaded that data into our database.\nAfter running the job successfully for several days, I realized that the third party data source only refreshed their data once a month. As such, I was simply downloading the same data every day. \nAt that point, I changed the start_date to a year ago (to get previous months' info), and changed the DAG's schedule to run once a month.\nHow do I (in the airflow UI) restart the DAG completely, such that it recognizes my new start_date and schedule, and runs a complete backfill as if the DAG is brand new?\n(I know this backfill can be requested via the command line. However, I don't have permissions for the command line interface and the admin is unreachable.)","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":3905,"Q_Id":56945611,"Users Score":7,"Answer":"Click on the green circle in the Dag Runs column for the job in question in the web interface. This will bring you to a list of all successful runs.\nTick the check mark on the top left in the header of the list to select all\ninstances, then in the menu above it choose \"With selected\" and then \"Delete\" in the drop down menu. This should clear all existing dag run instances.\nIf catchup_by_default is not enabled on your Airflow instance, make sure catchup=True is set on the DAG until it has finished catching up.","Q_Score":8,"Tags":"python,kubernetes,airflow,airflow-scheduler","A_Id":56953498,"CreationDate":"2019-07-09T04:59:00.000","Title":"Airflow: Re-run DAG from beginning with new schedule","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"i want to be able to use the pdb as a subprocess, input the debug operator, and get its output. and I found the fcntl may help, but to my surprise, it work for other program like gdb, but when the cmd is \"python\", or [\"python\", \"-m\", \"pdb\", \"computer.py\"], this will not work. \nI replace the cmd to 'gdb' or other program, it all works with fcntl.\nbut only failed when the cmd is 'python' related. \nPopen(['python', '-m', 'pdb', 'computer.py'], stdin=PIPE, stdout=PIPE, shell = False)\nflags = fcntl(p.stdout.fileno(), F_GETFL)\nfcntl(p.stdout.fileno(), F_SETFL, flags | O_NONBLOCK)\nthe expected result is i can get stdout correctly.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":52,"Q_Id":56965212,"Users Score":0,"Answer":"plus \"-u\" argument. \n-u     : unbuffered binary stdout and stderr; also PYTHONUNBUFFERED=x\n         see man page for details on internal buffering relating to '-u'","Q_Score":0,"Tags":"python,subprocess,nonblocking","A_Id":56965539,"CreationDate":"2019-07-10T07:09:00.000","Title":"non block read failed on stdout for python","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Seems as though an update on Windows 10 overnight broke Python. Just trying to run python --version returned a \"Permission Denied\" error.  None of the three updates; KB4507453, KB4506991, or KB4509096 look like they'd be the culprit but the timing of the issue is suspicious. Rather than messing with rolling back, I'm hoping there's a simpler fix that I'm missing.\nThe permissions on python are \"-rwxr-xr-x\" and I haven't changed anything besides letting the Windows update reboot machine after installing last night's patches.\nAccording to the System Information, I'm running 10.0.18362\nShould also note that this is happening whether I (try) to execute Python from git-bash using \"run as administrator\" or not, and if I try using PowerShell, it just opens the Windows store as if the app isn't installed so I'm thinking it can't see the contents of my \/c\/Users\/david\/AppData\/Local\/Microsoft\/WindowsApps\/ folder for some reason.\nI've also tried to reinstall Python 3.7.4, but that didn't help either. Is there something else I should be looking at?","AnswerCount":19,"Available Count":7,"Score":-0.0210495219,"is_accepted":false,"ViewCount":274059,"Q_Id":56974927,"Users Score":-2,"Answer":"May be you can try opening command prompt with Administrator privileges. (Run As Administrator). Works for me most of the time.","Q_Score":191,"Tags":"python,python-3.x,windows-store-apps,file-permissions,git-bash","A_Id":57162108,"CreationDate":"2019-07-10T16:23:00.000","Title":"\"Permission Denied\" trying to run Python on Windows 10","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Seems as though an update on Windows 10 overnight broke Python. Just trying to run python --version returned a \"Permission Denied\" error.  None of the three updates; KB4507453, KB4506991, or KB4509096 look like they'd be the culprit but the timing of the issue is suspicious. Rather than messing with rolling back, I'm hoping there's a simpler fix that I'm missing.\nThe permissions on python are \"-rwxr-xr-x\" and I haven't changed anything besides letting the Windows update reboot machine after installing last night's patches.\nAccording to the System Information, I'm running 10.0.18362\nShould also note that this is happening whether I (try) to execute Python from git-bash using \"run as administrator\" or not, and if I try using PowerShell, it just opens the Windows store as if the app isn't installed so I'm thinking it can't see the contents of my \/c\/Users\/david\/AppData\/Local\/Microsoft\/WindowsApps\/ folder for some reason.\nI've also tried to reinstall Python 3.7.4, but that didn't help either. Is there something else I should be looking at?","AnswerCount":19,"Available Count":7,"Score":0.0,"is_accepted":false,"ViewCount":274059,"Q_Id":56974927,"Users Score":0,"Answer":"Add the path of python folder in environmental variable and it will work\n1.search environmental variable\n2.look for system variable section and find variable named path in it\n3.double click on path and add new path which directs towards python folder and that's it.\nthe python folder is usually in\nC:\\Users[\"user name\"]\\AppData\\Local\\Programs\\Python\\Python39","Q_Score":191,"Tags":"python,python-3.x,windows-store-apps,file-permissions,git-bash","A_Id":66059202,"CreationDate":"2019-07-10T16:23:00.000","Title":"\"Permission Denied\" trying to run Python on Windows 10","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Seems as though an update on Windows 10 overnight broke Python. Just trying to run python --version returned a \"Permission Denied\" error.  None of the three updates; KB4507453, KB4506991, or KB4509096 look like they'd be the culprit but the timing of the issue is suspicious. Rather than messing with rolling back, I'm hoping there's a simpler fix that I'm missing.\nThe permissions on python are \"-rwxr-xr-x\" and I haven't changed anything besides letting the Windows update reboot machine after installing last night's patches.\nAccording to the System Information, I'm running 10.0.18362\nShould also note that this is happening whether I (try) to execute Python from git-bash using \"run as administrator\" or not, and if I try using PowerShell, it just opens the Windows store as if the app isn't installed so I'm thinking it can't see the contents of my \/c\/Users\/david\/AppData\/Local\/Microsoft\/WindowsApps\/ folder for some reason.\nI've also tried to reinstall Python 3.7.4, but that didn't help either. Is there something else I should be looking at?","AnswerCount":19,"Available Count":7,"Score":-0.010525927,"is_accepted":false,"ViewCount":274059,"Q_Id":56974927,"Users Score":-1,"Answer":"In Windows 10\n\nOpen Control Panel\nClick System\nClick the Advanced system settings link\nClick Environment Variables button\nIn the System Variables section find the PATH environment variable and select it\nClick Edit (If the PATH environment variable does not exist, click New)\nIn the Edit environment variable window specify the value of the PATH environment variable\nClick OK\nClose all remaining windows by clicking OK\nReopen Command prompt window and run python --version","Q_Score":191,"Tags":"python,python-3.x,windows-store-apps,file-permissions,git-bash","A_Id":67891580,"CreationDate":"2019-07-10T16:23:00.000","Title":"\"Permission Denied\" trying to run Python on Windows 10","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Seems as though an update on Windows 10 overnight broke Python. Just trying to run python --version returned a \"Permission Denied\" error.  None of the three updates; KB4507453, KB4506991, or KB4509096 look like they'd be the culprit but the timing of the issue is suspicious. Rather than messing with rolling back, I'm hoping there's a simpler fix that I'm missing.\nThe permissions on python are \"-rwxr-xr-x\" and I haven't changed anything besides letting the Windows update reboot machine after installing last night's patches.\nAccording to the System Information, I'm running 10.0.18362\nShould also note that this is happening whether I (try) to execute Python from git-bash using \"run as administrator\" or not, and if I try using PowerShell, it just opens the Windows store as if the app isn't installed so I'm thinking it can't see the contents of my \/c\/Users\/david\/AppData\/Local\/Microsoft\/WindowsApps\/ folder for some reason.\nI've also tried to reinstall Python 3.7.4, but that didn't help either. Is there something else I should be looking at?","AnswerCount":19,"Available Count":7,"Score":0.010525927,"is_accepted":false,"ViewCount":274059,"Q_Id":56974927,"Users Score":1,"Answer":"The simplest thing to do would be to modify your PATH and PYTHONPATH environmental variables to make sure that the folder containing the proper python binaries are searched befor the local WindowsApp folder.  You can access the environmental variables by opening up the control panel and searching for \"env\"","Q_Score":191,"Tags":"python,python-3.x,windows-store-apps,file-permissions,git-bash","A_Id":60709937,"CreationDate":"2019-07-10T16:23:00.000","Title":"\"Permission Denied\" trying to run Python on Windows 10","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Seems as though an update on Windows 10 overnight broke Python. Just trying to run python --version returned a \"Permission Denied\" error.  None of the three updates; KB4507453, KB4506991, or KB4509096 look like they'd be the culprit but the timing of the issue is suspicious. Rather than messing with rolling back, I'm hoping there's a simpler fix that I'm missing.\nThe permissions on python are \"-rwxr-xr-x\" and I haven't changed anything besides letting the Windows update reboot machine after installing last night's patches.\nAccording to the System Information, I'm running 10.0.18362\nShould also note that this is happening whether I (try) to execute Python from git-bash using \"run as administrator\" or not, and if I try using PowerShell, it just opens the Windows store as if the app isn't installed so I'm thinking it can't see the contents of my \/c\/Users\/david\/AppData\/Local\/Microsoft\/WindowsApps\/ folder for some reason.\nI've also tried to reinstall Python 3.7.4, but that didn't help either. Is there something else I should be looking at?","AnswerCount":19,"Available Count":7,"Score":0.0525830348,"is_accepted":false,"ViewCount":274059,"Q_Id":56974927,"Users Score":5,"Answer":"For me, I tried manage app execution aliases and got an error that python3 is not a command so for that, I used py instead of python3 and it worked\nI don't know why this is happening but It worked for me","Q_Score":191,"Tags":"python,python-3.x,windows-store-apps,file-permissions,git-bash","A_Id":64964202,"CreationDate":"2019-07-10T16:23:00.000","Title":"\"Permission Denied\" trying to run Python on Windows 10","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Seems as though an update on Windows 10 overnight broke Python. Just trying to run python --version returned a \"Permission Denied\" error.  None of the three updates; KB4507453, KB4506991, or KB4509096 look like they'd be the culprit but the timing of the issue is suspicious. Rather than messing with rolling back, I'm hoping there's a simpler fix that I'm missing.\nThe permissions on python are \"-rwxr-xr-x\" and I haven't changed anything besides letting the Windows update reboot machine after installing last night's patches.\nAccording to the System Information, I'm running 10.0.18362\nShould also note that this is happening whether I (try) to execute Python from git-bash using \"run as administrator\" or not, and if I try using PowerShell, it just opens the Windows store as if the app isn't installed so I'm thinking it can't see the contents of my \/c\/Users\/david\/AppData\/Local\/Microsoft\/WindowsApps\/ folder for some reason.\nI've also tried to reinstall Python 3.7.4, but that didn't help either. Is there something else I should be looking at?","AnswerCount":19,"Available Count":7,"Score":0.010525927,"is_accepted":false,"ViewCount":274059,"Q_Id":56974927,"Users Score":1,"Answer":"make sure C:\\Python39\\ and C:\\Python39\\Scripts\\ are added to both system path variables and user path variables","Q_Score":191,"Tags":"python,python-3.x,windows-store-apps,file-permissions,git-bash","A_Id":68309831,"CreationDate":"2019-07-10T16:23:00.000","Title":"\"Permission Denied\" trying to run Python on Windows 10","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Seems as though an update on Windows 10 overnight broke Python. Just trying to run python --version returned a \"Permission Denied\" error.  None of the three updates; KB4507453, KB4506991, or KB4509096 look like they'd be the culprit but the timing of the issue is suspicious. Rather than messing with rolling back, I'm hoping there's a simpler fix that I'm missing.\nThe permissions on python are \"-rwxr-xr-x\" and I haven't changed anything besides letting the Windows update reboot machine after installing last night's patches.\nAccording to the System Information, I'm running 10.0.18362\nShould also note that this is happening whether I (try) to execute Python from git-bash using \"run as administrator\" or not, and if I try using PowerShell, it just opens the Windows store as if the app isn't installed so I'm thinking it can't see the contents of my \/c\/Users\/david\/AppData\/Local\/Microsoft\/WindowsApps\/ folder for some reason.\nI've also tried to reinstall Python 3.7.4, but that didn't help either. Is there something else I should be looking at?","AnswerCount":19,"Available Count":7,"Score":1.0,"is_accepted":false,"ViewCount":274059,"Q_Id":56974927,"Users Score":16,"Answer":"Simple answer: replace python with PY everything will work as expected","Q_Score":191,"Tags":"python,python-3.x,windows-store-apps,file-permissions,git-bash","A_Id":66205649,"CreationDate":"2019-07-10T16:23:00.000","Title":"\"Permission Denied\" trying to run Python on Windows 10","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"We are looking to run Celery\/Redis in a kubenetes cluster, and currently do not have Redis persistence enabled (everything is in-memory). I am concerned about: Redis restarts (losing in-memory data), worker restarts\/outages (due to crashes and\/or pod scheduling), and transient network issues.\nWhen using Celery to do task processing using Redis, what is required to ensure that tasks are reliable?","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":1412,"Q_Id":56978831,"Users Score":0,"Answer":"In order to make your Celery cluster be more robust when using Redis as a broker (and result backend) I recommend using one (or more) replicas. Unfortunately redis-py does not yet have support for clustered Redis, but that is just a matter of time. In the replicated mode, when the master server goes down, replica takes its place and this is (almost) entirely transparent. Celery also supports Redis sentinels.\nCelery became much more robust over the years in terms of ensuring that tasks get redelivered in some critical cases. If the task failed because the worker is lost (there is a configuration parameter for it), some exception was thrown, etc - it will be redelivered, and executed again.","Q_Score":0,"Tags":"python,redis,celery","A_Id":56985275,"CreationDate":"2019-07-10T21:22:00.000","Title":"What is required for reliable task processing in Celery when using Redis?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm trying to compile C++ code for a Python3 extension on macOS, and I'm only able to compile if I #include \"$HOME\/anaconda3\/include\/python3.6m\/Python.h. Is there a way to #include <Python\/Python.h> and have the \"include\" refer to the anaconda Python.h instead of the system Python.h?","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":88,"Q_Id":56997148,"Users Score":1,"Answer":"Having your Python.h inside a directory named python3.6m makes it a bit awkward, but here are two possible ways to resolve the issue:\n\nRename the directory from python3.6m to Python, and then add the argument -I$HOME\/anaconda3\/include to your compile line, to tell the compiler to resolve include-paths starting at that folder.\nAlternatively, you could add a symlink so that the python3.6m directory can be accessed via two different names, e.g.:\ncd ~\/anaconda3\/include ; ln -s python3.6m Python\n\n... and then add the argument -I$HOME\/anaconda3\/include to your compiler arguments (same as in step 1)","Q_Score":0,"Tags":"macos,python,c++","A_Id":57000061,"CreationDate":"2019-07-11T20:24:00.000","Title":"CPython Python.h on macOS","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a simple python script that calls the Splunk API. For this, I include splunklib:\n\"import splunklib.client as client\"\nThis script works very well, when I start it from a terminal window (MacOS): python3 main.py\nFor this, I had to install splunklib using \"pip3 install splunklib\".\nUnfortunately I can't run the same script out of Pycharm.\nI also successfully installed splunklib under settings\/Project Interpreter\/Package. splunklib is shown in the list of installed packages for the Project Interpreter (splunklib 1.0.0, Python 3.7).\nWhen I run the script using Pycharm, I get the following error message:\nimport splunklib.client as client\nModuleNotFoundError: No module named 'splunklib.client'; 'splunklib' is not a package\nWhy can Pycharm not find Esplunklib, even though it's installed in the Project Interpreter?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":2226,"Q_Id":57001234,"Users Score":3,"Answer":"I had this same issue today, and tried to resolve it the same as you by doing a pip3 install splunklib. Unfortunately, the splunklib package is not the one you want. I'm not sure if that is a deprecated package, or something else entirely, but what you're probably looking for is the splunk-sdk.\nThis should get you going; pip3 install splunk-sdk","Q_Score":2,"Tags":"python-3.x,macos,pycharm,splunk-sdk","A_Id":59293259,"CreationDate":"2019-07-12T06:22:00.000","Title":"PyCharm doesn't Splunk SDK (splunklib)","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a python script that is called from a java program \nThe java program feeds data to the python script sys.stdin and the java program receives data from the python process outputstream . \nWhat is know is this .\nrunning the command  'python script.py' from the java program on 10MB of data takes about 35 seconds.\nHowever running the commands  'python script.py > temp.data ' and then  cat temp.data  is  significantly faster. \nThe order of magnitude of performance is even more drastic as the data gets larger.\nIn order to address this , I am thinking maybe there is a way to change the sys.stdout to mimic what I am doing.\nOr maybe I can pipe the python script output to a virtual file .\nAny recommendations ?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":169,"Q_Id":57067260,"Users Score":0,"Answer":"This is probably a buffering problem when you have the Java program writing to one filehandle and reading from another filehandle. The order of those in the Java and the size of the writes is suboptimal and it's slowing itself down.\nI would try \"python -u script.py\" to see what it does when you ask python to unbuffer, which should be slower but might trick your calling program into racing a different way, perhaps faster.\nThe larger fix, I think, is to batch your code, as you are testing with, and read the resulting file, or to use posix select() or filehandle events to handle how your java times its writes and reads.","Q_Score":0,"Tags":"python,bash,sys","A_Id":57068701,"CreationDate":"2019-07-17T01:13:00.000","Title":"receiving data from java program that calls python script is too slow","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"Is it possible to reference a virtual env\/ python that has been uploaded to a cloud storage bucket in GCP? I have a ubuntu docker image with all the proper credentials and service account set up within the image\nI'm able to use gsutil commands, however, when I try to export my PYSPARK_PYTHON variable, I get the ' No such file or directory ' error\nexport PYSPARK_PYTHON=gs:\/\/[bucket]\/deps\/env\/bin\/python3\npyspark \nenv: \u2018gs:\/\/[bucket]\/deps\/env\/bin\/python3\u2019: No such file or directory\nIf I run: \ngsutil ls gs:\/\/[bucket]\/deps\/env\/bin\/python3 \nI'm able to see the file\nI expect pyspark to work using the python dependencies and libraries within that bucket. Is this possible at all?","AnswerCount":2,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":232,"Q_Id":57076581,"Users Score":2,"Answer":"PYSPARK_PYTHON expects an executable python executable.\nFiles stored in object storage buckets cannot be directly executed.\nMake sure that the python executable is accessible as a file from within your image \/ some mount point.","Q_Score":0,"Tags":"python,python-3.x,google-cloud-platform,pyspark,google-cloud-storage","A_Id":57076979,"CreationDate":"2019-07-17T13:06:00.000","Title":"Reference Python virtual environment in a cloud storage bucket","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I want to run Kafka producer \/ consumer and connect them to the Broker using VS Code.\n1- I have already run a Kafka Broker with the docker-compose, with an active Kafka container. \nHow can I use the Kafka container without installing it locally ?\nI have installed the kafka library on my local machine, and everything worked perfectly.. \nExpected: Using the Kafka container instead of the local lib.","AnswerCount":3,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":154,"Q_Id":57077110,"Users Score":0,"Answer":"I'm answering this with the assumption that when you say you machine, you're referring to your local machine (I would comment directly on your question ask for clarification, but I don't have enough rep yet). Installing a library locally allows for it to work locally, but not in other environments. So you need to install the Kafka library within the environment you're targeting, too.","Q_Score":0,"Tags":"python,docker,apache-kafka,docker-compose","A_Id":57077312,"CreationDate":"2019-07-17T13:31:00.000","Title":"How Can I Run the python programs on Docker using active containers with the VS Code?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I want to run Kafka producer \/ consumer and connect them to the Broker using VS Code.\n1- I have already run a Kafka Broker with the docker-compose, with an active Kafka container. \nHow can I use the Kafka container without installing it locally ?\nI have installed the kafka library on my local machine, and everything worked perfectly.. \nExpected: Using the Kafka container instead of the local lib.","AnswerCount":3,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":154,"Q_Id":57077110,"Users Score":0,"Answer":"How can I use the Kafka container without installing it locally ? \n\nNot clear what \"it\" is... The Docker image? That's not how Docker works. \nYou need to install pull the Docker image locally in order to use it\n\nI have installed the kafka library on my local machine\n\nI assume that you mean something downloaded from kafka.apache.org? If that's the case, no, you don't need that for Python\nYou will instead have to pip install some Kafka Python package and write code to communicate to the Kafka container","Q_Score":0,"Tags":"python,docker,apache-kafka,docker-compose","A_Id":60638597,"CreationDate":"2019-07-17T13:31:00.000","Title":"How Can I Run the python programs on Docker using active containers with the VS Code?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am running Ubuntu on Windows (I can't change it). I use Sublime Test 3 as my code editor. I have Python installed on Ubuntu and I know the path to it from within Windows. Sublime's Python interpreter is not working when I run it. I would like to be able to do both of the following:\na) Run basic Python commands in Sublime Text 3 on Windows using Python installed in Ubuntu folders\nb) Run Python modules in Sublime Text 3 on Windows using modules installed in Ubuntu folders\nI have already tried adding the path to Python's Ubuntu folders to the PATH environment variable (for user, not for system). I didn't work. \nThen I installed Anaconda Python distribution on Windows, and added its path to the PATH variable (for user again). It did work. However, it means having to maintain two Pythons - one on Windows and one on Ubuntu, which defeats the purpose of my search. Also, I only managed to make it work for basic Python, and not for libraries. Adding PYTHONPATH variable with the path to Anaconda's modules on Windows broke the import of numpy and other libraries.\nJust to clarify, I do not use Anaconda distribution, I was just trying all I could.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":24,"Q_Id":57090203,"Users Score":0,"Answer":"Do you need your Sublime3 in Windows?\nYou can install it in your Ubuntu OS instead.","Q_Score":0,"Tags":"python,windows,ubuntu,sublimetext3","A_Id":57090733,"CreationDate":"2019-07-18T08:28:00.000","Title":"How to make Sublime's python interpreter work when Sublime's on Windows and Python is on Ubuntu","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I wrote a program that use pyperclip module and it would work from Pycharm and python IDLE, would work as well if starting from Powershell but if I try to start the program from WIN+R, when launched, the program returns an error saying that pyperclip module is not installed. The same problem appears when I run it from the Anaconda Powershell Prompt.\nPLEASE NOTICE: \nThe program was working perfectly before I installed Anaconda and Jupyterlab.\nThe error occurs when I run the program from the cmd using WIN+R AND when I run it from the Anaconda Command Prompt but it's fine when run from IDLE, Powershell, Pycharm.\nI always used python 3 and only yesterday I installed Anaconda.\nThanks for the help!","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":940,"Q_Id":57127523,"Users Score":0,"Answer":"I just spent couple of hours trying to solve exactly the same problem. What I found out is that, as couple of members have already pointed out, the main problem is the mismatch between the version of the python that runs in cmd and the versions of the python used in scripts\/batch files.\nThe first line in the code, known as \"shebang\", in .py file indicates the version of the python that the script should use when it is executed. So, it must match the version run by default with cmd (or when executed with win+R). In my case, I also have a batch file (.bat) that calls specified version of the python, which should be the same version used with .py file.\nThe problem was that both of my files (.py and .bat) were calling python 3.8 while the cmd is running version 3.7. Initially, I used shebang #! python3 in my .py file, and command @py path\/to\/python\/file.py %* (and I also tried @py.exe path\/to\/python\/file.py %*) in my .bat file, and that did not work.\nTo solve the problem, I updated these two files to link to python version 3.7 with following:\n\nchanged shebang in .py file to #! python\nchanged command in .bat file to @python path\/to\/python\/file.py %*\n\nWith these changes the system runs the program with win+R.","Q_Score":0,"Tags":"python,python-3.x,cmd,python-module","A_Id":58566761,"CreationDate":"2019-07-20T18:29:00.000","Title":"Pyperclip module installed but not found when program runs from cmd","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I wrote a program that use pyperclip module and it would work from Pycharm and python IDLE, would work as well if starting from Powershell but if I try to start the program from WIN+R, when launched, the program returns an error saying that pyperclip module is not installed. The same problem appears when I run it from the Anaconda Powershell Prompt.\nPLEASE NOTICE: \nThe program was working perfectly before I installed Anaconda and Jupyterlab.\nThe error occurs when I run the program from the cmd using WIN+R AND when I run it from the Anaconda Command Prompt but it's fine when run from IDLE, Powershell, Pycharm.\nI always used python 3 and only yesterday I installed Anaconda.\nThanks for the help!","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":940,"Q_Id":57127523,"Users Score":0,"Answer":"whew, taking course on python and instructor had py.exe instead of python.exe in .bat call. despite trying all of the other installation methods others have mentioned, just changing this to python.exe did that trick.","Q_Score":0,"Tags":"python,python-3.x,cmd,python-module","A_Id":69213643,"CreationDate":"2019-07-20T18:29:00.000","Title":"Pyperclip module installed but not found when program runs from cmd","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm not sure if this is a valid question, but I'm stuck doing this.\nI've a python script which does some operation on my local system\nUsers\/12345\/Desktop\/Sample\/one.py\nI want the same to be run on remote server whose path is \nServer\/Users\/23552\/Dir\/ASR\/Desktop\/Sample\/one.py\nI know how to do this in PHP using define path APP_HOME sort of I'm baffled in Python\nCan someone pl help me?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":38,"Q_Id":57157730,"Users Score":0,"Answer":"You can always use the relative path, I guess relative path should solve your issue.","Q_Score":1,"Tags":"python,python-3.x","A_Id":57409263,"CreationDate":"2019-07-23T06:15:00.000","Title":"Define dynamic environment path variables for different system configuration","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"In the process of discovering devices via Alexa, I'd like to create and pre populate groups with devices. The devices being discovered have data pertaining to which room\/group they belong to, so it would only seem natural to group these during discovery. \nIs this something that's possible? I haven't found anything in their documentation to suggest that it is","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":80,"Q_Id":57157766,"Users Score":0,"Answer":"Unfortunately you can't tell Alexa about groups in your discovery response.","Q_Score":3,"Tags":"python,node.js,alexa","A_Id":57160456,"CreationDate":"2019-07-23T06:18:00.000","Title":"Is there a way to create an Alexa smart home group and pre-populate it based on discovered devices, programatically?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I have a Lambda function in Python 3.7 which gets invoked explicitly and synchronously via Boto3. It is configured with a timeout of 5 minutes. While the 1st invocation is in progress for a minute, a second invocation is started with another request ID. Another minute later, the request is again retried, and this time it finished quicky. as it detects the system state has changed. An example sequence of invocations\n\n11:20:29 to 11:21:53 - log stream A - Req. ID: 68cfbd89-9f4c-4e8c-9de0-b9e548983692\n11:21:30 to 11:22:56 - log stream B - Req. ID: 1b569ffb-67b8-4e82-8e99-46424f45e2e5\n11:22:30 to 11:22:33 - log stream A - Req. ID: d9d60271-4626-43ab-bb3a-f14be057af13\n\nThe request ID that's returned from my Lambda call is d9d60271-4626-43ab-bb3a-f14be057af13.\nThe stack that invokes the Lambda is as follows:\n\nJenkins running a Pipeline script.\nThe script runs a Makefile which executes 2 sequential tasks.\n\n\nBuild a docker container\nRun a script inside the container.\n\nThe script that runs inside the container is in Python 3.7. It uses Boto3 to call some AWS APIs, then invokes the lambda with InvocationType=\"RequestResponse\".\n\nNone of the invocations exits with an unhandled exception or any obvious error. Is Lambda retrying my calls? Could any other element of this stack, notably Jenkins, be \"transparently\" retrying the task, and if so, how would I establish that?","AnswerCount":2,"Available Count":1,"Score":1.0,"is_accepted":false,"ViewCount":630,"Q_Id":57165547,"Users Score":6,"Answer":"This generally occurs due to cli time read out, which returns in multiple invocations of the lambda. Add --cli-read-timeout parameter to \naws lambda invoke\nor if using boto then follow as answered by YitzikC above\nFor aws cli the command would look like this\naws lambda invoke --function-name <fn name> --cli-read-timeout 900 --log-type Tail --region <region> \/dev\/stdout\nEnsure that the cli read timeout is equal to or greater than your lambda fun execution timeout","Q_Score":3,"Tags":"python,jenkins,aws-lambda,boto3","A_Id":57169406,"CreationDate":"2019-07-23T13:43:00.000","Title":"Amazon Lambda re-invoked every minute with multiple request IDs despite having no errors","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I'm trying to multi-thread some tasks using cosmosdb to optimize ETL time, and I can't find how, using the python API (but I could do something in REST if required) if I have a stored procedure to call twice for two partitions keys, I could send it to two different regions (namely 'West Europe' and 'Central France)\nI defined those as PreferredLocations in the connection policy but don't know how to include to a query, the instruction to route it to a specific location.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":45,"Q_Id":57183790,"Users Score":1,"Answer":"The only place you could specify that on would be the options objects of the requests. However there is nothing related to the regions.\nWhat you can do is initialize multiple clients that have a different order in the preferred locations and then spread the load that way in different regions.\nHowever, unless your apps are deployed on those different regions and latency is less, there is no point in doing so since Cosmos DB will be able to cope with all the requests in a single region as long as you have the RUs needed.","Q_Score":0,"Tags":"python,rest,azure-cosmosdb","A_Id":57185813,"CreationDate":"2019-07-24T13:11:00.000","Title":"How to send a query or stored procedure execution request to a specific location\/region of cosmosdb?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Python script not running from SQL Server Agent\nthe python script makes use of the requests library (installed)\nwhen i run from CMD :\npython \"C:\\Program Files (x86)\\Python37-32\\main.py\"\nthis works fine.\nwhen i run it from SQL agent as an Operating System (CmdExec) all i get is \"System cannot find the file specified\"\ni have set the enviorment paths.\nI have created a proxy account (sys admin)\ni have copied the requests library so its in the same folder as Python.\nnothing is working\n37 failed attempts today , and counting !\ncan anyone assist>\npython \"C:\\Program Files (x86)\\Python37-32\\main.py\"","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":106,"Q_Id":57187789,"Users Score":-1,"Answer":"i managed to get it working.\nmanually moved some libraries around in python.","Q_Score":0,"Tags":"python-2.7","A_Id":57218865,"CreationDate":"2019-07-24T16:48:00.000","Title":"Executing a python script from SQL Server Agent","Data Science and Machine Learning":0,"Database and SQL":1,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a GUI python script that runs perfectly well when I run it in the terminal, however I would like to remove the need to use terminal and just be able to click on an icon (like an application) to have the script run and open the GUI. Is there any way to do this? (detail appreciated) Thanks!","AnswerCount":3,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":137,"Q_Id":57197479,"Users Score":0,"Answer":"Yes, I found Pyinstaller to be the easiest to use. From terminal just do 'pip install pyinstaller'. Then once it's downloaded cd to the directory that contains the file. From there just run 'pyinstaller file-name' and it will create it for you :)","Q_Score":1,"Tags":"python,user-interface,tkinter,desktop-application","A_Id":57197592,"CreationDate":"2019-07-25T08:26:00.000","Title":"Is there a way to run a python script by clicking on an icon on e.g. the desktop?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I would like to use XMP Toolkit for manipulating my jpg files' metadata. \nBy installing, I need Exempi and boost, but I am somewhat stuck at installation of them. I tried to install them with brew, but documentation says exempi needs boost to compile \n\n\".\/configure --with-boost=\/usr\/local # (for Homebrew)\" .\n\nWhat should I do now? Could someone be so kind and help me, maybe with a little step-by step guide for noobs? Thanks","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":132,"Q_Id":57204621,"Users Score":1,"Answer":"Try running brew install exempi and homebrew should install Boost and other dependencies that are needed.","Q_Score":2,"Tags":"python-3.x","A_Id":58531449,"CreationDate":"2019-07-25T14:40:00.000","Title":"How to install XMP Toolkit on mac os x mojave","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Is there any way to log in Windows using pywinrm without password? If I can login the machine using my private key in pywinrm instead of password.\nI want to log in a Windows server form Linux, and I use pywinrm in python to do the work, but I need to provide the password, is there any way to log in without password?\ns = winrm.Session(hostIP,auth=(user,passWord), transport='ntlm')\nI want to find a way without password, such as use the private key store in my local Linux machine. Is this possible?","AnswerCount":1,"Available Count":1,"Score":-0.1973753202,"is_accepted":false,"ViewCount":174,"Q_Id":57216268,"Users Score":-1,"Answer":"No there is for this way. If you use Session you have to authorized . If it possible , telling the way of this is not ethichal movement for this web site.","Q_Score":0,"Tags":"python,linux,key,winrm","A_Id":57216542,"CreationDate":"2019-07-26T08:40:00.000","Title":"how to login windows using pywinrm whithout password, If I can login the machine using my private key in pywinrm","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"ERROR: Could not find a version that satisfies the requirement black==19.3b0 \n(from -r requirements.txt (line 5)) (from versions: none)\nERROR: No matching distribution found for black==19.3b0 (from -r requirements.txt (line 5))\nPlease help me to solve this error. \nI got this while  pip install -r requirements.txt and I use Mac","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":1125,"Q_Id":57235210,"Users Score":1,"Answer":"You are getting error because you are trying to install black in python2.\nBut black is only supported by python3\nDo like this:\npip3 install black==19.3b0\nor \npip3 install -r requirements.txt","Q_Score":0,"Tags":"python,python-3.x,python-2.7","A_Id":57235236,"CreationDate":"2019-07-27T18:59:00.000","Title":"I have problem while installing requirement.txt","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm coding a project which needs cloud control device operation, and want to keep information in sync.\nThe cloud needs to know the state of device, such as when the network is interrupted and when the network is restored.\nWhen the network is restored, the modified information on the cloud is synchronized to device.\nanyone got an idea of how my approach should be like? any tips?\nI intend to add resident programs in the background at both ends to determine, but in fact, it is impossible for the cloud in the project to connect only one device, and multiple apps may run in one device, which is very tedious to do. Is there any simple component to realize this function?\nI wish control information and data information to be synchronized on the cloud and device","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":85,"Q_Id":57254477,"Users Score":0,"Answer":"Based on your tag, I'm assuming that you are using MQTT as a messaging protocol for your system. If so, to address your need for tracking the device-cloud connection state, MQTT specifies a feature called \"Last Will and Testament\".\nFrom the MQTT 3.1.1 Standard Section 3.1.2.5:\n\nIf the Will Flag is set to 1 this indicates that, if the Connect request is accepted, a Will Message MUST be stored on the Server and associated with the Network Connection. The Will Message MUST be published when the Network Connection is subsequently closed unless the Will Message has been deleted by the Server on receipt of a DISCONNECT Packet [MQTT-3.1.2-8].\n\nThis can be leveraged to let the remote MQTT client on the cloud know when the device is connected and when it disconnects by publishing an online payload to a topic (for example) device\/conn_status after a successful connection, and registering a Last Will offline message to the same topic. Now, whenever the device client goes offline, the broker will publish the offline payload on his behalf to the cloud client that can now act accordingly.","Q_Score":1,"Tags":"python-3.x,synchronization,cloud,mqtt,etcd3","A_Id":57319277,"CreationDate":"2019-07-29T13:03:00.000","Title":"How to keep information synchronized between the cloud and the device","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I built a python app that ran happily in its docker container until I added some http calls.. Using the library 'requests.' I did some research and alpine linux 3.7 has a library called 'py-requests'.. Only I can't seem to install this on my own system, to change my code to use it, and errors are thrown just leaving 'import requests' in my code. Py-pip doesn't seem to work either.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":1115,"Q_Id":57261543,"Users Score":-1,"Answer":"I couldn't use pip install because I was blocked by a corporate firewall. I added --proxy mycompanyproxy.com:80 --trusted-host pypi.org --trusted-host files.pythonhosted.org to my dockerfile's pip install command and was able to get what I needed. Thanks for commenting, and sorry for the vagueness, I am a noob :)","Q_Score":0,"Tags":"python,docker,alpine","A_Id":57317442,"CreationDate":"2019-07-29T21:18:00.000","Title":"How to use py-requests in alpine linux docker?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"dirA\/dirB\/dirC\/program.py\ndirA\/dirD\/target.py\nHow can I initiate the execution of target.py by program.py? I tried to use os.startfile(\".\\.\\.\\dirD\\target.py\") but unfortunately, it does not work. Have not found anything which helped.\nProgram.py should be closed. Also, it should be based on a relative path since the scripts will be used on multiple machines!","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":371,"Q_Id":57297948,"Users Score":0,"Answer":"I found a solution using the pathlib-module and os.startfile(). \npathlib.Path(__file__).parent.parent returns the desired directory so that os.startfile(str(pathlib.Path(file).parent) + [path]) executes the file.","Q_Score":0,"Tags":"python,execution","A_Id":57308016,"CreationDate":"2019-07-31T19:49:00.000","Title":"How can I start another file within a program using startfile and relative path?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have written a simple test code in python to toggle two of the I\/O pins on and off every few seconds. I would like to be able to run this code whenever the board powers on so that I don't need to bring a keyboard, mouse, and monitor everywhere I want to run the simple test. How do I do this on Mendel OS on a google coral?","AnswerCount":4,"Available Count":1,"Score":0.049958375,"is_accepted":false,"ViewCount":656,"Q_Id":57302900,"Users Score":1,"Answer":"Using crontab has been working consistently for me, you may want to add a time.sleep in the beginning of your python file\nedit crontab \ncrontab -e\nselect nano editor\nadd\n@reboot sudo python3 <path_to_your_script>","Q_Score":2,"Tags":"python-3.x,google-coral","A_Id":58123872,"CreationDate":"2019-08-01T06:22:00.000","Title":"How do I run a python script on boot on Google Coral?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"When opening an HDF5 file with h5py you can pass in a python file-like object. I have done so, where the file-like object is a custom implementation of my own network-based transport layer. \nThis works great, I can slice large HDF5 files over a high latency transport layer. However HDF5 appears to provide its own file locking functionality, so that if you open multiple files for read-only within the same process (threading model) it will still only run the operations, effectively, in series.\nThere are drivers in HDF5 that support parallel operations, such as h5py.File(f, driver='mpio'), but this doesn't appear to apply to python file-like objects which use h5py.File(f, driver='fileobj').\nThe only solution I see is to use multiprocessing. However the scalability is very limited, you can only realistically open 10's of processes because of overhead. My transport layer uses asyncio and is capable of parallel operations on the scale of 1,000's or 10,000's, allowing me to build a longer queue of slow file-read operations which boost my total throughput. \nI can achieve 1.5 GB\/sec of large-file, random-seek, binary reads with my transport layer against a local S3 interface when I queue 10k IO ops in parallel (requiring 50GB of RAM to service the requests, an acceptable trade-off for the throughput).\n\nIs there any way I can disable the h5py file locking when using driver='fileobj'?","AnswerCount":1,"Available Count":1,"Score":1.0,"is_accepted":false,"ViewCount":4420,"Q_Id":57310333,"Users Score":6,"Answer":"You just need to set the value to FALSE for the environment variable HDF5_USE_FILE_LOCKING.\nExamples are as follows:\nIn Linux or MacOS via Terminal: export HDF5_USE_FILE_LOCKING=FALSE\nIn Windows via Command Prompts (CMD): set HDF5_USE_FILE_LOCKING=FALSE","Q_Score":8,"Tags":"python,python-3.6,hdf5,h5py","A_Id":57445839,"CreationDate":"2019-08-01T13:37:00.000","Title":"Can we disable h5py file locking for python file-like object?","Data Science and Machine Learning":1,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"1) I have a script (calling python), that runs perfectly on local\n2) The same scripts crashes on cron\n3) I know it's related to environment as: env <my script> reproduces the error exactly\n4) I have no .bash, .profile or any of those common files. They do not exist but its clear the env is setup somehow.\nI tried printenv and tried to copy-paste into my script, it didnt work. \nAny ideas into where to look next?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":194,"Q_Id":57331096,"Users Score":0,"Answer":"A simple way to troubleshoot cron is to redirect the stdout and stderr to a log file\n\n5 * * * * path_to_yourscript > \/tmp\/cron_output.log 2>&1\n\nLet cron run and then take a look at the log file","Q_Score":0,"Tags":"python,cron","A_Id":57331834,"CreationDate":"2019-08-02T17:28:00.000","Title":"Simulate local run for cron job","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a periodic task scheduled to run every 10 minutes.  Sometimes this task completes in 2-3 minutes, sometimes it takes 20 minutes.\nIs there any way using celery beats to not open the task if the previous task hasn't completed yet?  I don't see an option for it in the interval settings.","AnswerCount":3,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":2134,"Q_Id":57334468,"Users Score":7,"Answer":"No, Celery Beat knows nothing about the running tasks.\nOne way to achieve what you are trying to do is to link the task to itself. async_apply() for an example has optional parameter link and link_error which can be used to provide a signature (it can be a single task too) to run if the task finishes successfully (link) or unsuccessfully (link_error).\nWhat I use is the following - I schedule task to run frequently (say every 5 minutes), and I use a distributed lock to make sure I always have only one instance of the task running.\nFinally a reminder - you can always implement your own scheduler, and use it in your beat configuration. I was thinking about doing this in the past for exactly the same thing you want, but decided that the solution I already have is good enough for me.","Q_Score":8,"Tags":"python,django,task,celery,scheduling","A_Id":57345459,"CreationDate":"2019-08-02T23:38:00.000","Title":"How to check if celery task is already running before running it again with beat?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I have a periodic task scheduled to run every 10 minutes.  Sometimes this task completes in 2-3 minutes, sometimes it takes 20 minutes.\nIs there any way using celery beats to not open the task if the previous task hasn't completed yet?  I don't see an option for it in the interval settings.","AnswerCount":3,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":2134,"Q_Id":57334468,"Users Score":0,"Answer":"I use Celery with Django models and I implemented a boolean has_task_running at the model level. Then with Celery signals I change the state of the flag to True when signal before_task_publish is trigged and False when a task terminates. Not simple but flexible.","Q_Score":8,"Tags":"python,django,task,celery,scheduling","A_Id":72109220,"CreationDate":"2019-08-02T23:38:00.000","Title":"How to check if celery task is already running before running it again with beat?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I'm using a .env file to handle logging into sites in my application and have added *.env to my .gitignore for the moment for security. However, this login will be needed for anyone that installs the project so I \u200bwas wondering what the way forward is. Will I have to discard this layer of security?","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":355,"Q_Id":57338371,"Users Score":0,"Answer":"I use the same method of configuring the environment variables for a development environment of my Node.js application. The approach that I have used is that I have explained the overall environment variables in a project wiki\u2014on GitLab. This helps other members of the team to create their own version of a .env file and configure the settings as per their machines. \nWe have more or less the following configurations, \n\nApplication Insights instrumentation keys\nSQL Server connection string, and its parts\nConfigurations for ORMs (delete tables)\nCurrent environment settings (production, development, testing)\n\nOf course these settings require a refresh, thus on each platform we either manually create a locally git-ignored .env file, or we use the CI\/CD environment settings to control the variables. \nOn GitLab, for instance, we can have the environment variables created in the .gitlab-ci.yml file which takes care of the variable injections for application to work fine. \n\nlogin will be needed for anyone that installs the project\n\nIf this login is for something related to production environment, then you need to rethink the overall security of your application. If these credentials are related to development or testing, then your team members can install the same tools and platforms on their own machines too. \nOh, one more thing, addition of .env file will surely cause problems on production when your application will load configurations on startup.","Q_Score":0,"Tags":"python,environment-variables","A_Id":57342859,"CreationDate":"2019-08-03T12:36:00.000","Title":"Is there a way to have deployment of a .env file while keeping security advantages of environment variables?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm using a .env file to handle logging into sites in my application and have added *.env to my .gitignore for the moment for security. However, this login will be needed for anyone that installs the project so I \u200bwas wondering what the way forward is. Will I have to discard this layer of security?","AnswerCount":2,"Available Count":2,"Score":0.0996679946,"is_accepted":false,"ViewCount":355,"Q_Id":57338371,"Users Score":1,"Answer":"Include a readme that explains the file needed and where to get the credentials for it.","Q_Score":0,"Tags":"python,environment-variables","A_Id":57338407,"CreationDate":"2019-08-03T12:36:00.000","Title":"Is there a way to have deployment of a .env file while keeping security advantages of environment variables?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I want to control airflow DAG runs using my python code base. There is a start DAG api POST \/api\/experimental\/dags\/<DAG_ID>\/dag_runs\nBut want to know if there is any stop DAG api which can just mark all the task failed\/abort for that particular DAG","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":1590,"Q_Id":57343676,"Users Score":0,"Answer":"You can pause it using \/api\/experimental\/dags\/\/paused\/ with boolean value.\nStopping a DAG is not available at this point in the experimental Rest API.\nUPDATE: There is something called _set_dag_run_state with paramers (dag_id, execution_date, state, session=None) with in mark_dags API. \nAlso, you could use set_dag_run_state_to_failed to mark a dag as failed and set_dag_run_state_to_running to mark a dag as a success. But I'm not quite sure what it's routeing could be.","Q_Score":2,"Tags":"python-3.x,airflow","A_Id":57346755,"CreationDate":"2019-08-04T03:57:00.000","Title":"Airflow api to stop a dag run","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I want to have a file which contains the path variable (my system's python path here will be F:\/Python\/python.exe) which is mentioned on the top of every python file stored in the www folder of wamp in Windows. Then I want to import that file to all the other files so that I don't need to mention the path on top of the file every time. Is this possible?\nI have tried creating a function and creating a variable that stored the variable but obviously that can't be done. So how to create such a file which can be imported in other files. Or is there any other solution for what I want to achieve?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":31,"Q_Id":57388129,"Users Score":0,"Answer":"You can try this way \nMaybe this can help you to solve the problem\n\nCreate a file main.py\nIn that particular file do all the import statements\n\nThis will reduce the repentance of the import statements \nFrom your file:\nfrom main import *","Q_Score":1,"Tags":"python,python-3.x,wamp","A_Id":57389030,"CreationDate":"2019-08-07T06:24:00.000","Title":"How to create a file containing path and import that file into another python file in the so that the path does not need to be explicitly mentioed?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I would like to create a clone\/copy of an existing web application on pythonanywhere. I have access to the pythonanywhere account.  The application is active and is not mine - a friend is allowing me to make a copy so that I can learn how web applications work. Thus, it is important that I can make a copy without messing up or updating anything in the current web application. \nAll of the tutorials I am finding are about deploying an application via git to github to pythonanywhere (which I have done before) but never the other way around. \nI created an empty github repository and thought about going to the python bash console and adding it as a remote server, then pushing the code to github. But, I don't know if this makes a new connection that will mess up the application. I want to just download the application once and be done. \nI would really appreciate step-by-step instructions on how to download a copy of the web application to my local server and\/or github. If you provide code, please assume I know nothing and tell me where I should run it (command prompt, pythonanywhere bash console, etc).","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":1080,"Q_Id":57401599,"Users Score":2,"Answer":"I just did this the following way. In a bash console on pythonanywhere, navigate to the app with $cd yourapp. Then create a git repository there with git init. Once its done add the folders in the app to the repo with git add . Then you need to commit to update the empty repository: git commit -m \"your comment\". \nOnce the repo is created on pythonanywhere, move to the local folder in your local machine's terminal where you want to copy the app. Then clone the repo on pythonanywhere with entering the following command to your local terminal: git clone yourusername@ssh.pythonanywhere.com:\/home\/yourusername\/yourapp \nSince its not a bare repository, you won't be able to push any code changes to the pythonanywhere app, by default. This can be changed though, but I understand that is not what you want. If you want to make sure that no changes are applied back, just delete the .git folder from pythonanywhere which was created by the git init \nMy concern though is, that if your friend's app is database backed, you might be able to send data to the live database from your local instance of the app. So, definitely double check on that with him\/her.","Q_Score":1,"Tags":"git,github,pythonanywhere","A_Id":59017818,"CreationDate":"2019-08-07T20:03:00.000","Title":"How to clone an existing web application from pythonanywhere to github\/local","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I currently have a python application that runs perfectly from the CLI and when I run it from an IDE. I want to make it into an application that will launch in 1 click from any mac computer. (Like any desktop application). Ideally, I can send someone the file, they do a simple install, then the program works. I have tried using platypus (works great for 1 file programs) and other methods of bundling apps. But none of them seem to work as the program is kinda complex.\nProgram Requirements:\n\nPython3\nPython Libraries tkinter, socket, threading, PIL etc\n~8 individual python files (controlled by 1 main menu)\nLots of images\n\nI would like to have an install process, where you click next a bunch of times and agree to things, but if this isn't possible I can live without it.\nAny help is greatly appreciated!","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":172,"Q_Id":57402681,"Users Score":1,"Answer":"Use PyInstaller to build your package. I do not think they have an actual installer, but you could build your own GUI installer by using some CMD commands and something like tkinter.","Q_Score":1,"Tags":"python,python-3.x,macos,bundle","A_Id":57402706,"CreationDate":"2019-08-07T21:46:00.000","Title":"How to create a mac app from python files","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":1,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am setting a project path to some env variable like PROJECT_HOME by us using os.environ like this:\nos.environ['PROJECT_HOME'] = os.getcwd()\nso I can use %cd $PROJECT_HOME\/abc\/xyz in later cell\nHowever, the system return this:\n[Errno 2] No such file or directory: '${PROJECT_HOME}\/abc\/xyz'\nIs there a way to use env variable in %cd?","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":366,"Q_Id":57403139,"Users Score":1,"Answer":"This works for me: %cd {os.environ['PROJECT_HOME']}","Q_Score":0,"Tags":"jupyter-notebook,ipython","A_Id":57405510,"CreationDate":"2019-08-07T22:46:00.000","Title":"How to %cd to a path containing env variable in jupyter notebook","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have been trying to pip install psycopg2 for some time now\n\nI have just updated to python 3.7.4, before this problem started.\nTo set my path to a specific python version I used the code below.\n\nnano .bash_profile\nI thought that it would now be easy for my system to identify the path of the newly installed python, as to enable it to install psycopg2. Then the below started happening. \nThe second line of system terminal or python terminal is now always showing:\n\n-bash: zzzzz#: command not found on my terminal\n\nNo matter what I type on my terminal, I am always getting command not found","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":17,"Q_Id":57403175,"Users Score":0,"Answer":"This would mean you literally have \"zzzzz\" somewhere in the bash_profile. Bash is seeing \"zzzzz\" as just another command to run at startup like the rest of the profile script. As there is nothing in your PATH matching that string, bash reports the issue back to you.\nEither remove the extra line from your .bash_profile. OR use a terribly wasteful work-around!\nln -s \/bin\/true \/bin\/zzzzz\nThis will create a symbolic link to the \"true\" binary (all it ever does is return true) from zzzzz. Now bash can find zzzzz and run it during start up, which does nothing. No more error and an absurd work around. You should fix the file.","Q_Score":0,"Tags":"python-3.7","A_Id":57403344,"CreationDate":"2019-08-07T22:51:00.000","Title":"second line on my system or python terminal now saying: \u201c -bash: zzzzz#: command not found\u201c","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a large tar.gz archive file having nxml files and total size is around 5gb.\nMy aim is to extract files from it but, I do not have to extract all of them. I have to extract all those files whose name is greater than a threshold value.\nFor example:\nLet us consider 1000 is our threshold value. So\npath\/to\/file\/900.nxml will not be extracted but\npath\/to\/file\/1100.nxml will be extracted.\nSo my requirement is to make a conditional extraction of files from the archive.\nThanks","AnswerCount":2,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":123,"Q_Id":57406452,"Users Score":1,"Answer":"You can also use --wildcards option of tar.\nFor example in the case when your threshold is 1000 you can use tar -xf tar.gz --wildcards path\/to\/files\/????*.nxml. The ? will match one character and using * will match any number of character. This pattern will look for any file name with 4 or more characters.\nHope this helps.","Q_Score":1,"Tags":"python,bash,gzip,python-2.x,tar","A_Id":57424232,"CreationDate":"2019-08-08T06:31:00.000","Title":"Conditional extraction of files from an Archive file","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm trying to figure out how to manage my dag in Apache Airflow.\nThere are a few master steps that I need to.\nfor example, let's say step 1 and step 2 should always be executed before branching out. And then steps A, B, C, D, E should all be concurrently branched out after step 2, and each of these have their own steps.. so like A1, A2.. same with B~E. \nWhat's the best way of managing it? It looks like there is BranchOperator but it says it's really good for alerts, and I'm not trying to do alerts here but actually use operators for A1, A2.. steps. Should A-E be all subdags? If so, how do I trigger subdags?","AnswerCount":2,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":2378,"Q_Id":57407558,"Users Score":1,"Answer":"Do you want to concurrently execute all the Tasks A,B,C..etc? If so, then branchOperator may not be suitable. branchOperator selects a particular branch based some logic.","Q_Score":2,"Tags":"python,airflow","A_Id":57903751,"CreationDate":"2019-08-08T07:40:00.000","Title":"How to have multiple branches in airflow?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I wanted to know what version of virtual env is installed ? My OS is windows 10\nThank you","AnswerCount":3,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":22823,"Q_Id":57419287,"Users Score":15,"Answer":"In your terminal use the command:\nvirtualenv --version\nExample output:\n15.1.0","Q_Score":10,"Tags":"python-3.x,virtualenv","A_Id":57419316,"CreationDate":"2019-08-08T19:13:00.000","Title":"How to check what version of Virtual Env is installed","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I created a Flask Web App that uses an html form button to launch a Python script via a subproces call.  I want that Python script to launch cygwin and pass a shell script that launches an ansible playbook.  But the playbook is not running.  The screen just flickers and nothing is happening.\nThe flask web app works when testing on its own.  on its own it can write to a text file","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":127,"Q_Id":57419994,"Users Score":0,"Answer":"I think more information would be helpfull but basicly you can invoke ansible by any tool who can send commands to machine. Maybe the subprocess is the problem you should consider to use the call with: nohup and pipe all outputs to:  \/dev\/null 2>&1","Q_Score":0,"Tags":"python,windows,powershell,flask,ansible","A_Id":57424667,"CreationDate":"2019-08-08T20:17:00.000","Title":"Can I launch an ansible playbook from a cygwin terminal on windows?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I have python installed through windows store and I can install programs using pip, but when I try to run said programs, they fail to execute in powershell.\nHow can I make sure that the necessary \"scripts\" folder is in my path? I never faced these problems when installing from executable.\nFor example, \"pip install ntfy\" runs successfully in Powershell.\nThe command \"ntfy send test\" fails telling me the term is not part of a cmdlet, function, etc. etc.\nThe 'ntfy' program is  located here \/mnt\/c\/Users\/vlouvet\/AppData\/Local\/Packages\/PythonSoftwareFoundation.Python.3.7_qbz5n2kfra8p0\/LocalCache\/local-packages\/Python37\/Scripts\/ntfy.exe\nWhat is the recommended way of editing my path so that programs installed via pip are available across windows store updates of the Python language?","AnswerCount":3,"Available Count":1,"Score":1.0,"is_accepted":false,"ViewCount":10355,"Q_Id":57421669,"Users Score":7,"Answer":"The above answer is good but I managed to get it to work by doing the following.\n\nFind your installation under C:\\Users\\\"your user\"\\AppData\\Local\\Packages it will be named something like PythonSoftwareFoundation.Python.3.7_qbz5n2kfra8p0\nOpen your windows settings in the start menu\nIn search type Environment variables. Edit environment variables for your account should pop up. Click it\nIn the top box find Path, click it\nOn the right Click new and enter C:\\Users\\\"your user\"\\AppData\\Local\\Packages\\\"python install directory name from 1. here\"\\LocalCache\\local-packages\\Python37\\Scripts inside the little box under the last item in the list\nopen a new cmd prompt and type the script you wanted it should work.","Q_Score":10,"Tags":"python,windows,pip","A_Id":61709201,"CreationDate":"2019-08-08T23:05:00.000","Title":"Question about pip using Python from Windows Store","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I recently added python to my environment variables when this question popped into my head. When I type \"python\" into command prompt, windows seems to know which file to run. However, I added python into this environment variable called \"Path\", and never specified \"python\" anywhere.\n\nI don't understand how windows knows what I want when I type \"python\". Could someone help clear this up?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":1046,"Q_Id":57423108,"Users Score":2,"Answer":"PATH is an environment variable that holds values related to current user and operating system. It specifies the directories in which executable programs are located. so when you type python window gets its executable from PATH. hence, you won't need to type the whole path to the file on command line.","Q_Score":1,"Tags":"python,windows,windows-10,environment-variables,command-prompt","A_Id":57423356,"CreationDate":"2019-08-09T03:25:00.000","Title":"Windows how does the \"Path\" environment variable work?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"i am using python 3.6 and i tried to install win32com.client using pip install pywin32 but it shows error on importing link  \n\nCould not find a version that satisfies the requirement pywin32 (from\n  versions: ) No matching distribution found for pywin32\n\ni am using ubuntu.\npip3 install pywin32\n\nCould not find a version that satisfies the requirement pywin32 (from\n  versions: ) No matching distribution found for pywin32","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":340,"Q_Id":57424408,"Users Score":0,"Answer":"You can't use win32com as it's a Windows-only module. Your best bet is to use the Libreoffice API or a web API providing the conversion service.","Q_Score":0,"Tags":"python,win32com","A_Id":57432142,"CreationDate":"2019-08-09T06:20:00.000","Title":"How to convert PPT file to PDF in python Ubuntu?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm working with a MEAN stack application, that passes a file to python script, and this script doing some tasks and then it returns some results.\nThe question is and how to install the required python packages when I deploy it?  \nThanks!\nI've tried to run python code inside nodejs application, using python shell.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":358,"Q_Id":57428664,"Users Score":2,"Answer":"Place python script along with requirements.txt(which has your python dependencies) in your nodejs project\ndirectory.\nDuring deployment , call pip install on the requirements.txt and it\nshould install the packages for you.\nYou can call python script from nodejs just like any shell command\nusing inbuild child_process module or python-shell.","Q_Score":1,"Tags":"python,node.js,angular,file,mean-stack","A_Id":57430054,"CreationDate":"2019-08-09T10:59:00.000","Title":"How to deploy and run python scripts inside nodejs application?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I receive messages from a feed which sends about 2 million messages per day. Each of these messages is pretty small and they are not needing to be dealt with in a streaming fashion so I batch process a full day of messages at a time. \nThe current infrastructure receives these messages, groups them together and uploads a gzipped file containing 1000 messages to AWS S3. The files are named as a datetime stamp of the format yyyymmdd-hhmmss. The batch process runs once a day (scheduled on Airflow) and it should select the new files from the bucket and process them. Currently, I am not using any hooks or sensors for this job.\nMy question is; what is the best way to collect the new files from S3 if the folder also contains all previous day files?\nThe inefficient solution I have is to pull down the list of files in the folder on S3 and process the files which have a filename matching the date I am processing for. My batch process is an Airflow DAG so I would like to maintain idempotency, meaning I don't want to remove files from this S3 folder after processing.\nIdeally, I would like to select only the files with the datetime in the filename being after midnight the previous day (from execution date) and process them, without having to cycle thru the full list of files given this list will be growing continuously making each day slightly slower than the last.\nIs there a better mechanism provided either through Airflow or Python to select files from S3? Or is there a method of performing such a task in a more efficient way?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":778,"Q_Id":57462645,"Users Score":0,"Answer":"Not knowing your full infrastructure, is it possible for you to partition by date at the point of uploading the gzipped files to s3? \nIncluding a s3 folder prefix of \/date=yyyymmdd\/ would mean enable you to retrieve just that day's files and preserve idempotency.\nWhen it comes to your airflow job, you pass the date as an argument to retrieve only those days in that s3 partition.","Q_Score":2,"Tags":"python,python-3.x,amazon-web-services,amazon-s3,airflow","A_Id":57462903,"CreationDate":"2019-08-12T13:59:00.000","Title":"Batch processing from S3 with Airflow","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I want to create a webserver on linux in python so that I can use it to get csv files from the linux machine onto a windows machine. I am quite unfamiliar with networking terminology so I would greatly appreciate it if the answer is a little detailed. I dont want to create a website, just the webserver to get the csv file requested.","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":755,"Q_Id":57485604,"Users Score":0,"Answer":"You can create an simple file server, using flask, django or any other python web-server frameworks. There are just some small tips:\n\nYou should send csv files through HTTP POST request to web-server. I think  multi-part\/form-data is appropriate for this. \nAn small\/simple Database with track files received and their locations on disk.\nYou can also have something to translate csv files to database records on demand. After that you will be able to do very useful things on them.\n\nFor any more questions, ask different questions to get appropriate\/expert answers. (welcome to SO)","Q_Score":0,"Tags":"python,webserver","A_Id":57485935,"CreationDate":"2019-08-13T21:35:00.000","Title":"How to make a python webserver that gives a requested csv file","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a local virtualenv (venv) that was activated.\nMy script executes another script using subprocess.call(), but that causes the new script to be executed outside of the virtualenv.\nIs there any way to execute another process but keep it inside the virtualenv?\nEDIT: I don't it's a duplicate of the given links since I assume it is possible to avoid reactivating the virtualenv, and can somehow \"stay within it\"","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":171,"Q_Id":57488853,"Users Score":0,"Answer":"In the bin folder of your virtualenv you can find a file named activate_this.py.\nYou can use it to activate the virtualenv for the current interpreter. Documentation is inside the file.","Q_Score":0,"Tags":"python,python-3.x,subprocess,virtualenv","A_Id":57492796,"CreationDate":"2019-08-14T05:56:00.000","Title":"subprocess.call when inside virtualenv leaves the virtual environment on windows","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I installed python using the command:\n    brew install python3\nNow when I use 'which python', path is '\/usr\/bin\/python' and when I use 'which python3' path is 'usr\/local\/bin\/python3'\nShouldn't it fetch the same path ? \nAs python3, which is a version, still falls under python ?\nI just am not clear as to why different paths are thrown. Please Explain!","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":1668,"Q_Id":57493129,"Users Score":1,"Answer":"Python is a program, that will take inputs, and interpret them. How will it interpret them ? Following a set of rules, written in a lot of files. Where are these files written ? Somewhere the program knows. And by default, the 2 paths you have are the paths it knows where to go.\nPython2 and Python3 have different files, because even if they have the same base, they are not same and behave differently. Hence the 2 differents paths.\nThough, through the years, people have come up with solution to avoid these \"python version collisions\" on computers : it is called a virtualenv. \nVirtualenv is basically a script that will contain a whole new python (at the version you wish you install it), and, when you \"activate\" it, you will be able to use python, and have the version you wish to develop with. Doing this, everyone is able to only use python and still use different versions depending of the program you with to use.\nExample : You have python on your system which writes Python 2.7.12 when you do python --version. If you instantiate your virtualenv (see the doc), and then use python --version again, you might see something else along the lines of Python 3.6.8. Your former computer, or other scripts, can still use the previous python version, and you new script can use the new one, without any conflicts.","Q_Score":0,"Tags":"python,python-3.x,macos,python-2.7,homebrew","A_Id":57493345,"CreationDate":"2019-08-14T10:42:00.000","Title":"Two separate path for python when I use which python","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"There are so many documentation about running OpenEDX on Ubuntu, but there is not any clear documentation how to run OpenEDX on CentOS specially with cPanel.\nAnyone can help me regarding this case?","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":353,"Q_Id":57495379,"Users Score":0,"Answer":"I took \"tutor\" distribution which is in docker form, so it just ran smoothly over CentOS 7 of mine.","Q_Score":0,"Tags":"python,django,centos,cpanel,openedx","A_Id":62251687,"CreationDate":"2019-08-14T13:08:00.000","Title":"How to run OpenEDX on Centos 7 with cPanel","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm connected to a Raspberry Pi running Raspbian lite, using PuTTY with SSH. To execute a Python script, I'm navigating to the script's directory and using python3 scriptname.py, (this script is always running, unless being modified) after doing this, all I can see is the script's console log, and I don't think I'm able to do anything else with the Pi, unless if I stop the scripts execution.\nIs there anyway that I can send that process to the background, and continue to use the interface to do other things","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":283,"Q_Id":57547605,"Users Score":0,"Answer":"I appreciate the different solutions. I don't know why it didn't occur to me that opening a new terminal session would truly act as a new session, I would've guessed it would essentially clone the output, but thanks Mark. Thanks coderasha, I might use Linux Screen sometime. Also, thanks Dinko, I wasn't aware I could append executions using &!","Q_Score":0,"Tags":"python,raspberry-pi,raspbian","A_Id":57547830,"CreationDate":"2019-08-18T19:12:00.000","Title":"How can I have a Python script run in the background. I'm using terminal and SSH","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I want to use the same log file in multiple processes. But the processes aren't started with multiprocessing, so they have nothing shared.\nWhile googling around, I have realised that I should make a LogHandler which receives the messages through a queue. The LogHandler then is the only process which writes to the file. But the problem is to share the queue with the other processes.\nHow can I do that?","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":100,"Q_Id":57552537,"Users Score":0,"Answer":"You can create a lock file and each process check its value before reaching the log file.\nFor example : \nlockfile.txt write \"lock: 0\"\nAnd first process comes read is it 0 or 1. If it is 0, write 1 and access log file. Other processes will wait until seeing 0 in lock file.","Q_Score":0,"Tags":"python,queue","A_Id":57552695,"CreationDate":"2019-08-19T07:55:00.000","Title":"Python: Share queue between completely different processes","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Why airflow falls with TypeError: can't pickle module objects when task returns kwargs with provide_context= True?\nBut when I do print kwargs in same task - then everything is ok.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":2486,"Q_Id":57560813,"Users Score":1,"Answer":"The problem here is most likely something in the kwargs object. The error arises because when you return from an operator in airflow it is saved in the airflow database as part of the xcom set up. \nI would suggest you take a look at what's in your kwargs and figure out which items are \"module objects\" rather than more trivial data types. A simple way around the problem itself would be to only return the things you need to return, rather than the whole kwargs object.","Q_Score":2,"Tags":"python,airflow","A_Id":57576842,"CreationDate":"2019-08-19T16:40:00.000","Title":"Airflow falls with TypeError \"can't pickle module objects\" when task returns kwargs","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I recently followed a tutorial on web scraping, and as part of that tutorial, I had to execute (?) the script I had written in my command line.Now that script runs every hour and I don't know how to stop it.\nI want to stop the script from running. I have tried deleting the code, but the script still runs. What should I do?","AnswerCount":2,"Available Count":2,"Score":0.0996679946,"is_accepted":false,"ViewCount":869,"Q_Id":57590672,"Users Score":1,"Answer":"I can't comment, but you must show us the script or part of the script so we can try to find out the problem or the video you were watching. Asking just a question without an example doesn't help us as much figure out the problem.\n\nIf you're using Flask, in the terminal or CMD you're running the script. Type in CTRL+C and it should stop the script.   OR set the debug to false eg. app.run(debug=False) turn that to False because sometimes that can make it run in background and look for updates even though the script was stopped. In conclusion: Try to type CTRL+C or if not set debug to False","Q_Score":0,"Tags":"python,command-line","A_Id":57590799,"CreationDate":"2019-08-21T11:32:00.000","Title":"How do I stop a Python script from running in my command line?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I recently followed a tutorial on web scraping, and as part of that tutorial, I had to execute (?) the script I had written in my command line.Now that script runs every hour and I don't know how to stop it.\nI want to stop the script from running. I have tried deleting the code, but the script still runs. What should I do?","AnswerCount":2,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":869,"Q_Id":57590672,"Users Score":1,"Answer":"You can kill it from task manager.","Q_Score":0,"Tags":"python,command-line","A_Id":57590890,"CreationDate":"2019-08-21T11:32:00.000","Title":"How do I stop a Python script from running in my command line?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"So what I basically am trying to make is a program that asks user for file and displays absolute path of the program. For eg. If user enters 'Spotify' then I want to locate spotify.exe on the pc if It exists and print its absolute path.\nI wanted to make this for a personal assistant that I am working on.\nI previously tried \nos.system(input + '.exe')\nbut taking the eg of spotify only...it is not an internal file that will be recognised\u2026.please help.","AnswerCount":3,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":43,"Q_Id":57591112,"Users Score":0,"Answer":"Have you tried\nos.path.abspath(file)","Q_Score":0,"Tags":"python,file,project","A_Id":57591188,"CreationDate":"2019-08-21T11:58:00.000","Title":"I want to make a program that takes file name from user and displays absolute path of the file","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"So what I basically am trying to make is a program that asks user for file and displays absolute path of the program. For eg. If user enters 'Spotify' then I want to locate spotify.exe on the pc if It exists and print its absolute path.\nI wanted to make this for a personal assistant that I am working on.\nI previously tried \nos.system(input + '.exe')\nbut taking the eg of spotify only...it is not an internal file that will be recognised\u2026.please help.","AnswerCount":3,"Available Count":2,"Score":-0.0665680765,"is_accepted":false,"ViewCount":43,"Q_Id":57591112,"Users Score":-1,"Answer":"If you are using Linux, you can use os.system('which spotify')","Q_Score":0,"Tags":"python,file,project","A_Id":57591191,"CreationDate":"2019-08-21T11:58:00.000","Title":"I want to make a program that takes file name from user and displays absolute path of the file","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Is it possible to use one of airflow's operators to run an Impala query in the same way it can do Hive queries? I imagine a bash operator will work but would like do do it using the airflow api.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":1517,"Q_Id":57595410,"Users Score":0,"Answer":"To connect impala from airflow, we need to mention authentication type and run_set_variable_statements in extra column in connection.\nTo connect with no authentication mechanism, below are the connection details.\nConnection Type : Hive Server 2 Thrift\nPort : 21050\nSchema: Your Database\nExtra: {\"authMechanism\": \"NOSASL\", \"run_set_variable_statements\":false}","Q_Score":1,"Tags":"python,airflow,cloudera,impala","A_Id":59576651,"CreationDate":"2019-08-21T15:58:00.000","Title":"Impala query using Airflow","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a piece of DASK code run on local machine which work 90% of time but will stuck sometimes.  Stuck mean.  No crash, no error print out not cpu usage.  never end.    \nI google and think it maybe due to some worker dead.  I will be very useful if I can see the worker log and figure out why.\nBut I cannot find my worker log.  I go to edit config.yaml to add loging but still see nothing from stderr. \nThen I go to dashboard --> info --> logs and see blank page.\nThe code it stuck is \nX_test = df_test.to_dask_array(lengths=True)\nor \nproba = y_pred_proba_train[:, 1].compute()\nand my ~\/.config\/dask\/config.yaml or ~.dask\/config.yaml look like\nlogging:\n  distributed: info\n  distributed.client: warning\n  distributed.worker: debug\n  bokeh: error \nI am using \npython 3.6\ndask 1.1.4 \nAll I need is a way to see the log so that I can try to figure out what goes wrong.\nThanks\nJoseph","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":149,"Q_Id":57618323,"Users Score":1,"Answer":"Worker logs are usually managed by whatever system you use to set up Dask.  \nPerhaps you used something like Kubernetes or Yarn or SLURM?  \nThese systems all have ways to get logs back.  \nUnfortunately, once a Dask worker is no longer running, Dask itself has no ability to collect logs for you.  You need to use the system that you use to launch Dask.","Q_Score":2,"Tags":"python,dask","A_Id":57712280,"CreationDate":"2019-08-23T00:00:00.000","Title":"Dask worker seem die but cannot find the worker log to figure out why","Data Science and Machine Learning":1,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I wanted to upload a zipped build folder to my linux machine and unzip and deploy.. My issue here is the zip file itself 400MB takes 2 hour to upload, is there any way, I can compress file more to reduce like 100MB or some and upload? Anyother help also welcome.. Am doing it with Jenkins and python\nI tried to make it as tar or gzip which results same size","AnswerCount":2,"Available Count":2,"Score":-0.1973753202,"is_accepted":false,"ViewCount":33,"Q_Id":57620675,"Users Score":-2,"Answer":"you can use Uharch programm to compress your file","Q_Score":0,"Tags":"python,file-upload,ftp","A_Id":57620769,"CreationDate":"2019-08-23T06:09:00.000","Title":"I wanted to upload a zipped build folder to my linux machine and unzip and deploy","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I wanted to upload a zipped build folder to my linux machine and unzip and deploy.. My issue here is the zip file itself 400MB takes 2 hour to upload, is there any way, I can compress file more to reduce like 100MB or some and upload? Anyother help also welcome.. Am doing it with Jenkins and python\nI tried to make it as tar or gzip which results same size","AnswerCount":2,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":33,"Q_Id":57620675,"Users Score":0,"Answer":"There is nothing which can magically compress 400 MB to 100 MB, especially not if these are already compressed data like (usually) when you have a ZIP file. \nHow much data can be compressed depends very much on the data - for normal text 50% is not unusual but for binary data it is much less. And it usually will not be able to compress already compressed data any further - otherwise you could just compress again and again until you only have a single byte.\n\nI tried to make it as tar or gzip which results same size\n\nThis is expected. While different compression algorithms might slightly differ in the compression they can achieve these differences are only in a few percent and not in the several factors you need here. Lossless compression is essentially compacting information and data can only be compacted up to some size since the original information somehow needed to by retained. This is different to compression of images or audio where loss of information is often acceptable (and results in loss of quality) and thus much higher compression factors are possible.","Q_Score":0,"Tags":"python,file-upload,ftp","A_Id":57621158,"CreationDate":"2019-08-23T06:09:00.000","Title":"I wanted to upload a zipped build folder to my linux machine and unzip and deploy","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to detect the drive failure in Datanode in a Hadoop Cluster. Cloudera Manager API don't have any specific API for that. CM API are only related to Name node or restart services. Are there any suggestions here? Thanks a lot!","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":520,"Q_Id":57621257,"Users Score":1,"Answer":"If you have access to NameNode UI, the JMX page will give you this information. If you hit the JMX page directly it'll be a JSON formatted page, which can be parsed easily.\nWe use HortonWorks primarily, haven't touched Cloudera in a long time, but I assume that can be made available somehow.","Q_Score":0,"Tags":"python-3.x,hadoop,hadoop-yarn,cloudera,cloudera-manager","A_Id":57633508,"CreationDate":"2019-08-23T06:58:00.000","Title":"How to detect in Hadoop cluster if any Datanode drive (Storage) failed","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have python 3.6.6 and I can create a virtual environment with this version using virtulaenv ..I have installed python in drive(C) C:\\python36 where the OS is installed.How can I install a specific version like python 2.7.16 in the virtual environment.Do I have to install python 2.7.16 manualy or will it download itself?I saw some answers for linux but couldn't get it.I tried\n\nPS C:\\Users\\Husni\\Desktop\\dev> virtualenv -p C:\/python2.7.16 .\nThe path C:\/python2.7.16 (from --python=C:\/python2.7.16) does not\n  exist\n\nThen I tried \n\nPS C:\\Users\\Husni\\Desktop\\dev> virtualenv -p python36 .\nThe path python36 (from --python=python36) does not exist","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":172,"Q_Id":57628368,"Users Score":0,"Answer":"you can't. install python 2 and virtualenv for it and run like \"py -2 -m virtualenv venv\"","Q_Score":0,"Tags":"python,windows,virtualenv","A_Id":57628481,"CreationDate":"2019-08-23T14:34:00.000","Title":"How to install a specific version of python in the virtual enivironment in windows?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a folder on my desktop that contains my script and when I run it in the pycharm ide it works perfectly but when I try to run from the terminal I get  \/Users\/neelmukherjee\/Desktop\/budgeter\/product_price.py: Permission denied\nI'm not quite sure as to why this is happening\nI tried using ls -al to check the permissions and for some reason, the file is labelled as\ndrwx------@  33 neelmukherjee  staff      1056 26 Aug 09:03 Desktop\nI'm assuming this means that I should run this file as an admin. But how exactly can I do that?\nMy goal is to run my script from the terminal successfully and that may be possible by running it as an admin how should I do that?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":35,"Q_Id":57650883,"Users Score":0,"Answer":"Ok, so I was able to figure it out. I had to use\nchmod +x to help make it executable first.\nchmod +x \/Users\/neelmukherjee\/Desktop\/budgeter\/product_price.py\nand the run \/Users\/neelmukherjee\/Desktop\/budgeter\/product_price.py","Q_Score":0,"Tags":"python-3.x,macos,terminal","A_Id":57651015,"CreationDate":"2019-08-26T01:21:00.000","Title":"Python script denied in terminal","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I want to write a script in bash\/python such that the script copies the latest file which arrives at hdfs directory.I know I can use inotify in local, but how to implement it in hdfs?\nCan you please share the sample code for it. When I searched for it in google it gives me long codes.Is there a simpler way other than inotify(if its too complex)","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":144,"Q_Id":57652601,"Users Score":0,"Answer":"Inelegant hack:\nMount hdfs using FUSE then periodically use find <mountpoint> -cmin n to get a list of files created in the last n minutes.\nThen use find <mountpoint> -anewer to sort them.","Q_Score":0,"Tags":"python,bash,hdfs,inotify","A_Id":57653039,"CreationDate":"2019-08-26T06:10:00.000","Title":"How to watch an hdfs directory and copy the latest file that arrives in hdfs to local?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am an extreme beginner with Python and its libraries and installation in general. I want to make an extremely simple google search web scraping tool. I was told to use Requests and BeautifulSoup. I have installed python3 on my Mac by using brew install python3 and I am wondering how to get those two libraries\nI googled around and many results said that by doing brew install python3 it will automatically install pip so I can use something like pip install requests but it says pip: command not found.\nby running python3 --version it says Python 3.7.4","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":165,"Q_Id":57665963,"Users Score":0,"Answer":"Since you're running with Python3, not Python (which usually refers to 2.7), you should try using pip3.\npip on the other hand, is the package installer for Python, not Python3.","Q_Score":0,"Tags":"python-3.x,pip","A_Id":57666013,"CreationDate":"2019-08-26T23:20:00.000","Title":"How to install stuff like Requests and BeautifulSoup to use in Python?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I am trying to deploy a Flask app to an Azure Web App (Linux, python3.7 runtime) using FTP.\nI copied the \"application.py\" over and a \"requirements.txt\", but I can see in the logs that nothing is being installed.\nThe Web App is using an 'antenv' virtual environment but it won't install anything. How do I add libraries to this 'antenv' virtual environment?","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":2242,"Q_Id":57666646,"Users Score":0,"Answer":"Turns out I had to run these commands and do a git push while my local venv was activated. At that point I saw azure start downloading all the libraries in my requirements.txt","Q_Score":2,"Tags":"python,azure,azure-web-app-service","A_Id":57667310,"CreationDate":"2019-08-27T01:27:00.000","Title":"How do you pip install libraries to the 'antenv' venv on an Azure Web App?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":1},{"Question":"I'm writing a python program which uses subprocess to send files via cURL.  It works, but for each file\/zip it outputs the loading progress, time and other stuff which I don't want to be shown.  Does anyone know how to stop it?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":106,"Q_Id":57676703,"Users Score":0,"Answer":"You should add stderr=subprocess.DEVNULL or stderr=subprocess.PIPE to your check_output call","Q_Score":0,"Tags":"python,python-3.x,subprocess","A_Id":57676861,"CreationDate":"2019-08-27T14:17:00.000","Title":"Stop subprocess.check_output to print on video","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a project with venv that works just fine, but when we need to run roslaunch rosbridge_server rosbridge_websocket.launch it will result in the error below unless we deactivate venv.\n\nprocess[rosbridge_websocket-2]: started with pid [10182]\n  process[rosapi-3]: started with pid [10183]\n  Failed to load Python extension for LZ4 support. LZ4 compression will not be available.\n  Failed to load Python extension for LZ4 support. LZ4 compression will not be available.\n  registered capabilities (classes):\n   - \n   - \n   - \n   - \n   - \n   - \n   - \n   - \n  Traceback (most recent call last):\n    File \"\/opt\/ros\/kinetic\/lib\/rosbridge_server\/rosbridge_websocket\", line 44, in \n      from rosbridge_server import RosbridgeWebSocket, ClientManager\n    File \"\/opt\/ros\/kinetic\/lib\/python2.7\/dist-packages\/rosbridge_server\/init.py\", line 4, in \n      from .udp_handler import RosbridgeUdpSocket,RosbridgeUdpFactory\n    File \"\/opt\/ros\/kinetic\/lib\/python2.7\/dist-packages\/rosbridge_server\/udp_handler.py\", line 6, in \n      from twisted.internet.protocol import DatagramProtocol,Factory\n  ImportError: No module named 'twisted'\n\nI am assuming this is because there's no module named twisted installed in the virtual environment but it is installed on my computer. Following this hypothesis, this means that making roslaunch rosbridge_server rosbridge_websocket.launch work would require to install all the dependencies that it needs in venv? How would one go to do that?","AnswerCount":2,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":845,"Q_Id":57680190,"Users Score":1,"Answer":"just make sure the version of python you are using in venv and the environment where those packages are installed is same, if thats not the case, then you probably need to correct the python paths. \nMostly when you are running something in venv, the interpreter will only look inside that virtual environment, so when i face that issue, i just stopped using venv for ros and exported the pythonpaths or any ros module if they are installed for python3. distribution.","Q_Score":0,"Tags":"ros,python-venv","A_Id":57793913,"CreationDate":"2019-08-27T18:12:00.000","Title":"`roslaunch rosbridge_server rosbridge_websocket.launch` requires to deactivate venv","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I am using celery to do some distributed tasks and want to override celery_taskmeta and add some more columns. I use Postgres as DB and SQLAlchemy as ORM. I looked up celery docs but could not find out how to do it.\nHelp would be appreciated.","AnswerCount":2,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":1097,"Q_Id":57688644,"Users Score":2,"Answer":"I would suggest a different approach - add an extra table with your extended data. This table would have a foreign-key constraint that would ensure each record is related to the particular entry in the celery_taskmeta. Why this approach? - It separates your domain (domain of your application), from the Celery domain. Also it does not involve modifying the table structure that may (in theory it should not) cause trouble.","Q_Score":1,"Tags":"python,postgresql,sqlalchemy,celery","A_Id":57689713,"CreationDate":"2019-08-28T08:59:00.000","Title":"Overriding celery result table (celery_taskmeta) for Postgres","Data Science and Machine Learning":0,"Database and SQL":1,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Installed python from scratch on computer and still throws an error anytime a .py file is being used whether it's my short script 'print('aa')' or some other utility (Jenkins Job Builder) which uses python script underneath dropping this line: Invalid -W option ignored: invalid module name: 'yaml' every time.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":561,"Q_Id":57704874,"Users Score":2,"Answer":"Module yaml is provided by PyYAML package, so do a \npip install PyYAML. \nHowever, look at your setup.py, dependencies should be configured properly and PyYAML should be installed as a dependency.","Q_Score":2,"Tags":"python,file,debugging,config","A_Id":57704928,"CreationDate":"2019-08-29T07:11:00.000","Title":"Python throws: Invalid -W option ignored: invalid module name: 'yaml'","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I've three different machine learning models in python. To improve performance, I run them on different terminals in parallel. They are communicating and sharing data with one another through files. These models are creating batches of files to make available for other. All the processes are running in parallel but dependent on data prepared by other process. Once a process A prepares a batch of data, it creates a file to give signal to other process that data is ready, then process B starts processing it, while looking for other batch too simultaneously. How can this huge data be shared with next process without creating files? Is there any better way to communicate among these processes without creating\/deleting temporary files in python?\nThanks","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":43,"Q_Id":57726054,"Users Score":0,"Answer":"You could consider running up a small Redis instance... a very fast, in-memory data structure server.\nIt allows you to share strings, lists, queues, hashes, atomic integers, sets, ordered sets between processes very simply.\nAs it is networked, you can share all these data structures not only within a single machine, but across multiple machines.\nAs it has bindings for C\/C++, Python, bash, Ruby, Perl and so on, it also means you can use the shell, for example, to quickly inject commands\/data into your app to change its behaviour, or get debugging insight by looking at how variables are set.","Q_Score":0,"Tags":"process,ubuntu-16.04,python-3.5","A_Id":57726305,"CreationDate":"2019-08-30T11:38:00.000","Title":"What is the best way to communicate among multiple processes in ubuntu","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I accidentally downloaded the 32-bit version of Python on my Win 10 (64bit). I uninstalled it, reinstalled the correct version, deleted all other python files\/folders that I had, also reinstalled Anaconda, but I keep getting the same error when I try to do some stuff in Jupyter.\nIs there a way to fix this? Am I missing a file that is still the 32 bit version which is why my PC keeps detecting and selecting the 32bit python version as well?","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":275,"Q_Id":57731014,"Users Score":1,"Answer":"Alright, it seems I have indeed missed some files in AppData when removing the wrong python bit version. Removed all files, and installed Anaconda and 64bit Python again (making sure no old files were on my PC), and it finally works.","Q_Score":1,"Tags":"python-3.x,jupyter-notebook,path-variables,python-windows-bundle","A_Id":57732194,"CreationDate":"2019-08-30T17:32:00.000","Title":"Getting \"OSError: [WinError 193] %1 is not a valid Win32 application\" error even after reinstalling the right version","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"How to set the source IP address for UDP multicast packages to something else than the interface IP?\nI am trying to write a small router that selectively routes UDP SSDP packages from one network to another. The plan is to do it in python, although I am flexible on that.\nIt seems fairly easy to route SSDP NOTIFY messages: I receive them on one interface and decide which interface to re-broadcast them on. However the protocol for M-SEARCH messages require that the source IP is set to the original source of the message as any service that chooses to respond will respond with a unicast message to the source IP and port.\nExample (heavily simplified):\n\nNetwork A: 192.168.10.0\/24\nNetwork B: 192.168.11.0\/24\nMy router application runs on a multihomed computer on 192.168.10.2 and 192.168.11.2.\n\nA client on network A with IP 192.168.10.10 sends an M-SEARCH message:\n\nSrc IP\/Port: 192.168.10.10 port 40000\nDst IP\/Port: 239.255.255.250 port 1900\n\nMy \"router application\" on 192.168.10.2 receives the packet and would like to rebroadcast it on network B. However I cannot find any method in the socket API that allows me to set the source IP address. Only to pick the source interface.\nThus the rebroadcasted packet now looks like this:\n\nSrc IP\/Port: 192.168.11.2 port xxxxx\nDst IP\/Port: 239.255.255.250 port 1900\n\nAnd now the receiving service is unable to unicast back to the client as the original IP and port are lost.","AnswerCount":1,"Available Count":1,"Score":0.537049567,"is_accepted":false,"ViewCount":403,"Q_Id":57744381,"Users Score":3,"Answer":"How to set the source IP address for UDP multicast packages to something else than the interface IP?\n\nThe only way I know of is to use a RAW socket and construct the IP headers manually.  Note that use of RAW sockets is typically restricted to admin users on most platforms.\n\nHowever I cannot find any method in the socket API that allows me to set the source IP address. \n\nBecause there isn't one.\n\nAnd now the receiving service is unable to unicast back to the client as the original IP and port are lost.\n\nCan't you just have your router remember the original source when it receives the M-SEARCH request, and when it receives the unicast reply then forward it to the original requester? That is how most routers usually work.","Q_Score":0,"Tags":"python,sockets,multicast","A_Id":57752433,"CreationDate":"2019-09-01T08:26:00.000","Title":"Setting source address when sending UDP multicast messages","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm looking for a way publishing Celery messages to SNS topic, to be subscribed by multiple queues. \nThe reason I would like to do so, is that I'm trying to implement Multiple Receivers pattern using Celery \nI.e every service will get all the messages were published, and execute only the relevant ones. All the rest will be acknowledged","AnswerCount":2,"Available Count":2,"Score":0.0996679946,"is_accepted":false,"ViewCount":663,"Q_Id":57756593,"Users Score":1,"Answer":"You need to dig deeply into the SQS transport to find out the format of the Celery messages, and then implement publishing via SNS... Celery does not provide this out-of-box. I am sure Celery team would welcome this as some kind of utility addition, or similar. It would be a useful feature.","Q_Score":1,"Tags":"python,amazon-web-services,celery,amazon-sqs,amazon-sns","A_Id":57767596,"CreationDate":"2019-09-02T11:59:00.000","Title":"Celery publish messages using SNS","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I'm looking for a way publishing Celery messages to SNS topic, to be subscribed by multiple queues. \nThe reason I would like to do so, is that I'm trying to implement Multiple Receivers pattern using Celery \nI.e every service will get all the messages were published, and execute only the relevant ones. All the rest will be acknowledged","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":663,"Q_Id":57756593,"Users Score":0,"Answer":"The pattern we are going to implement is an event bus, where each microservice have its own queue.\nI.e for each service we will have 2 queues, one subscribed to SNS topic, second for the worker. the first will be consumed by a poller, inserting new jobs to worker queue.\nThis will allow decoupling between two services, i.e one service can be down while the second appends new messages to the queue","Q_Score":1,"Tags":"python,amazon-web-services,celery,amazon-sqs,amazon-sns","A_Id":57855056,"CreationDate":"2019-09-02T11:59:00.000","Title":"Celery publish messages using SNS","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I\u2019m trying to run a python script via execute shell script in Jenkins. \nFrom my understanding Jenkins is using its own shell or Python interpreter which is different from the local environment. \nI.e , running the command python -V from Jenkins executing shell I\u2019m getting 2.7.12 version\nIn terminal running python -V I\u2019m getting 3.7.0\nWhich I aliased \u201cpython\u201d in bash_aliases to \/usr\/local\/bin\/python3.7\nI\u2019d like to be able to run in a specific Jenkins project the python that I\u2019m using locally. \nAll of what I\u2019ve tried is trash so it is not worth to share this garbage... \nWhat is the right way to be able to run the python I want without changing Jenkins configurations.","AnswerCount":3,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":4308,"Q_Id":57759310,"Users Score":0,"Answer":"Multiple ways to think of an answer to your question,\n\nAdd a Jenkins slave where you could configure the Python3 installation path as a tool\nIf allowed add your local machine where you have installed python3 as a Jenkins slave, that will help you to execute the script in your environment directly.\nI hope you have added shebang line in your python script, that is the best way to instruct your script to use any specific python installation to execute the script.\nIf the Jenkins slave has the required package installed in a shared location or afs location, that can be utilized while executing the python script.","Q_Score":0,"Tags":"python,jenkins","A_Id":57760032,"CreationDate":"2019-09-02T15:13:00.000","Title":"Configuring Jenkins python specifically","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am practicing model deployment to GCP cloud ML Engine. However, I receive errors stated below when I execute the following code section in my local jupyter notebook. Please note I do have bash installed in my local PC and environment variables are properly set.\n%%bash\ngcloud config set project $PROJECT\ngcloud config set compute\/region $REGION\nError messages:\n-bash: line 1: \/mnt\/c\/Users\/User\/AppData\/Local\/Google\/Cloud SDK\/google-cloud-sdk\/bin\/gcloud: Permission denied\n-bash: line 2: \/mnt\/c\/Users\/User\/AppData\/Local\/Google\/Cloud SDK\/google-cloud-sdk\/bin\/gcloud: Permission denied\nCalledProcessError: Command 'b'gcloud config set project $PROJECT\\ngcloud config set compute\/region $REGION\\n\\n'' returned non-zero exit status 126.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":315,"Q_Id":57787007,"Users Score":0,"Answer":"Perhaps you installed Google Cloud SDK with root?\ntry \nsudo gcloud config set project $PROJECT\nand \nsudo gcloud config set compute\/region $REGION","Q_Score":0,"Tags":"python,google-cloud-platform,jupyter-notebook,gcloud,gcp-ai-platform-notebook","A_Id":57788161,"CreationDate":"2019-09-04T11:00:00.000","Title":"how do I give permission to bash to run to multiple gcloud commands from local jupyter notebook","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have developed multiple PowerShell scripts for Windows OS \nCheck Memory utilization\nChanging service state\nRetrieving User Information.\ni want to develop the same scripts for Linux and Mac OS, is there any way i can use existing powershell scripts.","AnswerCount":3,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":4692,"Q_Id":57806605,"Users Score":0,"Answer":"I suppose there is not an automagical way to convert ps to bash nor to use ps scripts natively on Linux. You have to rewrite them, using bash, python, perl or whatever scripting language you prefer and considering that windows works in a different way.","Q_Score":0,"Tags":"python,bash,powershell","A_Id":57813142,"CreationDate":"2019-09-05T13:28:00.000","Title":"Is there any way to convert Powershell,Python script to Bash script?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have developed multiple PowerShell scripts for Windows OS \nCheck Memory utilization\nChanging service state\nRetrieving User Information.\ni want to develop the same scripts for Linux and Mac OS, is there any way i can use existing powershell scripts.","AnswerCount":3,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":4692,"Q_Id":57806605,"Users Score":0,"Answer":"You can call your python script in the .bat file by doing the following in your .bat file:\n\"python.exe path\" \"the path for your python script\" and then save it as a .bat file.\nYou can get the executable python path by typing \"where python\" on your cmd.","Q_Score":0,"Tags":"python,bash,powershell","A_Id":66734408,"CreationDate":"2019-09-05T13:28:00.000","Title":"Is there any way to convert Powershell,Python script to Bash script?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I installed one python library (camelot) on my mac. Now tried to run the same code on a linux machine where I do not have a root access.\nIt needs some underlying .so libs to be installed etc. on a machine but I do not have access to install them..\nIs there a way to port the whole library as a package to another machine and run it without installation?","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":25,"Q_Id":57824796,"Users Score":1,"Answer":"This is when docker comes in handy because you can encapsulate entire environments and underlying libraries. Python\/Conda Environments (pipenv\/conda-env) are another way to manage dependencies but are not as easily portable.","Q_Score":1,"Tags":"python,lib","A_Id":57824908,"CreationDate":"2019-09-06T15:25:00.000","Title":"Is it possible to port a python library (and underlying libs related to it) from one computer to another?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"When I try to download python 3 to my computer it can't run. Because it shows me the classic 0xc0000005 error. So, I've tried every solution that I could find, it still doesn't work. (I've tried installing the newest IE version and disabled all chrome auto update. I've also search my pc with Avast for malwares and found nothing) \nAny good solution?\nThanks","AnswerCount":2,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":1052,"Q_Id":57827754,"Users Score":1,"Answer":"I will give you a default troubleshooting that can help you (because this is a os error):\nTry reboot pc.\nThen open cmd (run like administrator).\nWrite sfc \/scannow (here u control that your os has no problem).\nPS: are u sure that u choose the correct version of python (i mean 32\/64 bit)","Q_Score":1,"Tags":"python,windows-7","A_Id":57828002,"CreationDate":"2019-09-06T19:44:00.000","Title":"Can't Install Python on Windows 7 (0xc0000005)","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have python 3.7 and am trying to get pyinstaller but heard that the two are not compatible. I tried to download 3.4 but my computer will not allow me to get it. Is there a version of python that works on Mac and can install pyinstaller?","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":46,"Q_Id":57836868,"Users Score":0,"Answer":"Is you have pip installed on your MAC computer, try the following command to install pyinstaller from pip : pip install pyinstaller","Q_Score":0,"Tags":"python","A_Id":57836903,"CreationDate":"2019-09-07T19:29:00.000","Title":"How do you install pyinstaller on Mac","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to import a python module called pattern in my code. However, when I run:\npip install pattern\nI get the following output:\nCollecting pattern\nUsing cached \nhttps:\/\/files.pythonhosted.org\/packages\/1e\/07\/b0e61b6c818ed4b6145fe01d1c341223aa6cfbc3928538ad1f2b890924a3\/Pattern-3.6.0.tar.gz\nCollecting future (from pattern)\n  Using cached https:\/\/files.pythonhosted.org\/packages\/90\/52\/e20466b85000a181e1e144fd8305caf2cf475e2f9674e797b222f8105f5f\/future-0.17.1.tar.gz\nCollecting backports.csv (from pattern)\n  Using cached https:\/\/files.pythonhosted.org\/packages\/8e\/26\/a6bd68f13e0f38fbb643d6e497fc3462be83a0b6c4d43425c78bb51a7291\/backports.csv-1.0.7-py2.py3-none-any.whl\nCollecting mysqlclient (from pattern)\n  Using cached https:\/\/files.pythonhosted.org\/packages\/4d\/38\/c5f8bac9c50f3042c8f05615f84206f77f03db79781db841898fde1bb284\/mysqlclient-1.4.4.tar.gz\n    ERROR: Command errored out with exit status 1:\n     command: \/usr\/bin\/python -c 'import sys, setuptools, tokenize; sys.argv[0] = '\"'\"'\/tmp\/pip-install-4Proy9\/mysqlclient\/setup.py'\"'\"'; __file__='\"'\"'\/tmp\/pip-install-4Proy9\/mysqlclient\/setup.py'\"'\"';f=getattr(tokenize, '\"'\"'open'\"'\"', open)(__file__);code=f.read().replace('\"'\"'\\r\\n'\"'\"', '\"'\"'\\n'\"'\"');f.close();exec(compile(code, __file__, '\"'\"'exec'\"'\"'))' egg_info --egg-base pip-egg-info\n         cwd: \/tmp\/pip-install-4Proy9\/mysqlclient\/\n    Complete output (12 lines):\n    sh: 1: mysql_config: not found\n    sh: 1: mariadb_config: not found\n    sh: 1: mysql_config: not found\n    Traceback (most recent call last):\n      File \"<string>\", line 1, in <module>\n      File \"\/tmp\/pip-install-4Proy9\/mysqlclient\/setup.py\", line 16, in <module>\n        metadata, options = get_config()\n      File \"setup_posix.py\", line 61, in get_config\n        libs = mysql_config(\"libs\")\n      File \"setup_posix.py\", line 29, in mysql_config\n        raise EnvironmentError(\"%s not found\" % (_mysql_config_path,))\n    EnvironmentError: mysql_config not found\n    ----------------------------------------\nERROR: Command errored out with exit status 1: python setup.py egg_info Check the logs for full command output.\nI already have mysql installed and I've tried installing mysqlclient as well. I am not sure what to do!","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":331,"Q_Id":57839760,"Users Score":1,"Answer":"To build\/install mysqlclient you will need mysqlclient libraries and header files. To determine their location mysqlclient needs to call mysql_config script (which was not found).\nYou need to install mysql client library. (e.g. libmysqlclient-dev). Also make sure that mysql_config script is in your path.","Q_Score":1,"Tags":"python,mysql,database,installation,mariadb","A_Id":57840679,"CreationDate":"2019-09-08T06:48:00.000","Title":"Cannot install pattern module in python on windows ubuntu","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to do some tasks in django that consume alot of time. For that, I will be running background tasks.\nAfter some R&D, i have found two solutions:\n\nCelery with RabbitMQ.\nDjango Background tasks.\n\nBoth options seem to fulfill the criteria but setting up Celery will require some work. Now as far as the second option is concerned, setup is fairly simple and in fairly quick amount of time, i can go on writing background tasks. Now my questions if i adopt the 2nd option is this:\n\nHow well does Django Background tasks perform ? (Scalability wise in Production environment).\nCan i poll the tasks (after some time) in DB to check the task's status?\nArchitecture of Django-Background-tasks? Couldn't find any clear explanation about it's architecture (Or have I missed some resource?)\nAgain coming to the first point, how well does Django Background tasks perform in production. (Talking about prior experience of using this in prod.)","AnswerCount":3,"Available Count":2,"Score":1.0,"is_accepted":false,"ViewCount":4312,"Q_Id":57854332,"Users Score":6,"Answer":"How well does Django Background tasks perform ? - This will depend upon how and what you implement. One thing to note is, Django-background-tasks is based upon database where celery can have redis\/rabbitmq as backend, so most probably we'll see considerable performance difference here.\nCan I poll the tasks (after some time) in DB to check the task's status? - It's possible in celery and maybe you can find a solution by inspecting django-background-tasks internal code. But one thing is, we can abort celery task, which maybe not possible in Django-Background-tasks.\nArchitecture of Django-Background-tasks? Couldn't find any clear explanation about it's architecture (Or have I missed some resource?) - It's simple Django based project. You can have a look at code. It's seems to be pretty straightforward.\nAgain coming to the first point, how well does Django Background tasks perform in production. - Haven't used in production. But since Django-Background-tasks is database based and celery can be configured to use redis\/rabbitmq - I think celery have a plus point here.\n\nTo me this comparison, seems to be link comparing pistol with a high-end automatic machine guns. Both do same job. But one simple straightforward - other little complicated but with lots of options and scope.\nChoose based on your use case.","Q_Score":6,"Tags":"python,django,task,celery,background-task","A_Id":57887089,"CreationDate":"2019-09-09T12:44:00.000","Title":"Django Background tasks vs Celery","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I am trying to do some tasks in django that consume alot of time. For that, I will be running background tasks.\nAfter some R&D, i have found two solutions:\n\nCelery with RabbitMQ.\nDjango Background tasks.\n\nBoth options seem to fulfill the criteria but setting up Celery will require some work. Now as far as the second option is concerned, setup is fairly simple and in fairly quick amount of time, i can go on writing background tasks. Now my questions if i adopt the 2nd option is this:\n\nHow well does Django Background tasks perform ? (Scalability wise in Production environment).\nCan i poll the tasks (after some time) in DB to check the task's status?\nArchitecture of Django-Background-tasks? Couldn't find any clear explanation about it's architecture (Or have I missed some resource?)\nAgain coming to the first point, how well does Django Background tasks perform in production. (Talking about prior experience of using this in prod.)","AnswerCount":3,"Available Count":2,"Score":0.0665680765,"is_accepted":false,"ViewCount":4312,"Q_Id":57854332,"Users Score":1,"Answer":"I have decided to use Django-Background-Tasks. Let me clarify my motivations.\nThe tasks that will be processed by Django-Background-Tasks doesn't need to be processed in a fast manner. As it is stated by the name, they are background tasks. I accept delays.\nThe architecture of Django-Background-Tasks is very simple. When you call a method to be process in the background in your code a task record is inserted to the Django-Background-Tasks tables in your database. And the method you called is not executed actually. It is proxied. Then you should trigger another process to execute the jobs. Your method is then executed in this process.\nThe process that execute jobs can be executed by a cron entry in your server.\nSince this setup is so easy and work for I decided to use Django-Background-Tasks. But If I needed something more responsive and fast I would use Celery since it is using memory and there is an active process that processes the jobs. Which isn't the case in Django-Background-Tasks.","Q_Score":6,"Tags":"python,django,task,celery,background-task","A_Id":68205920,"CreationDate":"2019-09-09T12:44:00.000","Title":"Django Background tasks vs Celery","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"My understanding of Python asserts is that are meant for debugging and that they don't get executed for \"optimized\" Python code (python -O).\nFor production app engine code, is -O used and thus stripping asserts or will asserts get executed?","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":78,"Q_Id":57860405,"Users Score":0,"Answer":"As far as i understand from Python asserts, once you set the global assertions to -0 they all become \"null-operations\" as in, they will get compiled but won't be evaluated or have they're conditional expressions executed. \nThey get set like that at the Python interpreter level so i don't think that GAE actually affects that.","Q_Score":0,"Tags":"python,google-app-engine,assert","A_Id":57867078,"CreationDate":"2019-09-09T19:51:00.000","Title":"Do asserts get stripped out in GAE Python?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"My understanding of Python asserts is that are meant for debugging and that they don't get executed for \"optimized\" Python code (python -O).\nFor production app engine code, is -O used and thus stripping asserts or will asserts get executed?","AnswerCount":2,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":78,"Q_Id":57860405,"Users Score":3,"Answer":"I ran a test on the platforms I use to know for sure.  Asserts do get executed for:\n\nGAE standard first generation\nGAE flexible","Q_Score":0,"Tags":"python,google-app-engine,assert","A_Id":57924896,"CreationDate":"2019-09-09T19:51:00.000","Title":"Do asserts get stripped out in GAE Python?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to connect to and read an on-premise data source using an AWS Glue Python Shell job. I am using Pygresql (which comes bundled on Glue) and Pandas. Everything works locally.\nBut when I push this job up to Glue, the database connections all timeout. Why is this happening? Do I need to do something magic with VPCs?","AnswerCount":2,"Available Count":2,"Score":0.0996679946,"is_accepted":false,"ViewCount":226,"Q_Id":57861188,"Users Score":1,"Answer":"I guess you need to create a Glue connection with your VPC settings and attach it to the Glue job.","Q_Score":0,"Tags":"python-3.x,amazon-web-services,aws-glue,amazon-vpc,pygresql","A_Id":57869524,"CreationDate":"2019-09-09T21:05:00.000","Title":"AWS Glue Python Shell script timing out","Data Science and Machine Learning":0,"Database and SQL":1,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to connect to and read an on-premise data source using an AWS Glue Python Shell job. I am using Pygresql (which comes bundled on Glue) and Pandas. Everything works locally.\nBut when I push this job up to Glue, the database connections all timeout. Why is this happening? Do I need to do something magic with VPCs?","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":226,"Q_Id":57861188,"Users Score":0,"Answer":"Note that pygresql SQL query doesn't work in python shell. Recommended is postgresql","Q_Score":0,"Tags":"python-3.x,amazon-web-services,aws-glue,amazon-vpc,pygresql","A_Id":57875570,"CreationDate":"2019-09-09T21:05:00.000","Title":"AWS Glue Python Shell script timing out","Data Science and Machine Learning":0,"Database and SQL":1,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I create a Conda environment (myenv), and build a Python extension (using distutils) in this env.\nMy library uses some libraries which exist on both \/usr\/local\/lib and \/home\/user\/miniconda3\/envs\/myenv\/lib.\nIn myenv, LD_LIBRARY_PATH is empty, but ldd mylib.so shows that my library links to libraries in \/home\/user\/miniconda3\/envs\/myenv\/lib.\nThis makes sense but I wonder why it doesn't link to libraries in \/usr\/local\/lib?","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":2566,"Q_Id":57868519,"Users Score":0,"Answer":"Most likely, you're using the compiler and related toolchain from your conda environment. This toolchain is set up to use the libraries from your conda environment automatically.","Q_Score":5,"Tags":"python,conda,distutils","A_Id":57936028,"CreationDate":"2019-09-10T10:08:00.000","Title":"LD_LIBRARY_PATH in Conda environment","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I create a Conda environment (myenv), and build a Python extension (using distutils) in this env.\nMy library uses some libraries which exist on both \/usr\/local\/lib and \/home\/user\/miniconda3\/envs\/myenv\/lib.\nIn myenv, LD_LIBRARY_PATH is empty, but ldd mylib.so shows that my library links to libraries in \/home\/user\/miniconda3\/envs\/myenv\/lib.\nThis makes sense but I wonder why it doesn't link to libraries in \/usr\/local\/lib?","AnswerCount":2,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":2566,"Q_Id":57868519,"Users Score":2,"Answer":"I found that path\n$ORIGIN\/..\/lib was set in RPATH of python in myenv.","Q_Score":5,"Tags":"python,conda,distutils","A_Id":58164888,"CreationDate":"2019-09-10T10:08:00.000","Title":"LD_LIBRARY_PATH in Conda environment","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a long-running Apache Beam batch analysis process on Google Cloud Dataflow that failed partway through.  To save time and cost, is it possible to update my code to handle the failure, and re-run from the failure point using cached intermediate checkpoints?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":450,"Q_Id":57879396,"Users Score":1,"Answer":"Dataflow batch pipelines discard all intermediate results when the pipeline terminates (successfully or fails).\nCurrently you would need to add points within the pipeline where the intermediate data is materialized and then on failure you could launch a new pipeline which is a subset of your existing pipeline that reads the intermediate results and continues processing.","Q_Score":0,"Tags":"python,google-cloud-dataflow,apache-beam","A_Id":57915380,"CreationDate":"2019-09-10T23:43:00.000","Title":"Can an Apache Beam batch process be restarted from a checkpoint?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"Hopefully a simple question,\nWhen installing Python 3.7 on a Mac, can you remove the folder from Applications containing the IDLE and the Launcher without breaking the install? I don't have an IDLE for the 2.7 that is built-into the Mac and don't want one for 3.7 either.\nPS: I already removed it, but I would like to know if indeed something breaks as a result of this; if not, then I shall leave it as is.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":198,"Q_Id":57923118,"Users Score":0,"Answer":"Deleting the Python folder in \/Applications will cause no problems. The contents are the IDLE.app for writing python, the Python Launcher app, which provides a configurable way to run python scripts by double-clicking them in the Finder, some documentation, and a couple of shell scripts to configure the installation.\n'Actual python' that you call in the Terminal with all its libraries and dependencies is stored in \/Library.\nThe entire folder is less than 1 Mb, (excluding the Extras folder that comes with some versions, which adds a hefty 2 Mb) so you're not saving much by deleting it.","Q_Score":0,"Tags":"python,python-3.x,macos,installation","A_Id":58026404,"CreationDate":"2019-09-13T11:50:00.000","Title":"Can you remove the Python folder from Applications after install?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to start cmd window and then running a chain of cmds in succession one after the other in that cmd window.\nsomething like start cmd \/k pipenv shell && py manage.py runserver the start cmd should open a new cmd window, which actually happens, then the pipenv shell should start a virtual environment within that cmd instance, also happens, and the py manage.py runserver should run in the created environment but instead it runs where the script is called. \nAny ideas on how I can make this work?","AnswerCount":2,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":826,"Q_Id":57941842,"Users Score":1,"Answer":"Your py manage.py runserver command calling python executor in your major environment. In your case, you could use pipenv run manage.py runserver that detect your virtual env inside your pipfile and activate it to run your command. An alternative way is to use virtualenv that create virtual env directly inside your project directory and calling envname\\Scripts\\activate each time you want to run something inside your virtual env.","Q_Score":2,"Tags":"python,batch-file,cmd","A_Id":57942022,"CreationDate":"2019-09-15T06:56:00.000","Title":"Start cmd and run multiple commands in the created cmd instance","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have tried activating my conda for a while now, when I do conda env list I get an env like this \"C:\\Users\\Allaye\\Anaconda3\" and I issue this command 'conda activate C:\\Users\\Allaye\\Anaconda3',  but when I restart my machine again I still gets the same activate environment error. any help. but write now even the conda command isn't working again..\nI don't know what to do now, because it seems when I activate the environment it only on a tempora basics","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":138,"Q_Id":57946424,"Users Score":0,"Answer":"Activating a conda environment applies to the current shell or terminal window only. That way, you can open several terminals and activate different conda environments in each. It's not a persistent setting, you have to repeat it every time you open a terminal to work in a specific conda environment.\nYou could define aliases or helper scripts for each environment, so you have to do less typing.","Q_Score":0,"Tags":"python,anaconda","A_Id":57946915,"CreationDate":"2019-09-15T17:13:00.000","Title":"error when activating anaconda environment","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"How can I get the max CPU \/ RAM usage in Linux, when starting a process inside my python code ?\nI want to calculate from the start of the process till the process end","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":719,"Q_Id":57957082,"Users Score":0,"Answer":"To get the memory, a very simple way would be to get the output of:\n\/proc\/YOUR_PROGRAM_PID\/status\n... capture this at the start, and end, of the python process, and extract the memory fields you care about (e.g.  VmPeak, VmSize)","Q_Score":0,"Tags":"python,linux,cpu-usage","A_Id":57957127,"CreationDate":"2019-09-16T12:39:00.000","Title":"Getting the max CPU \/ RAM usage for a process in Linux","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"How can I get the max CPU \/ RAM usage in Linux, when starting a process inside my python code ?\nI want to calculate from the start of the process till the process end","AnswerCount":2,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":719,"Q_Id":57957082,"Users Score":1,"Answer":"\"Maximum CPU usage\" is essentially meaningless. At any instant in time, a process is either running on one (or more) CPUs, or is not running. As such, the maximum CPU usage of any process will always be at least 100%, because there was at least one instant at which the process is running. Tools which display CPU usage as a percentage are measuring the ratio of CPU time consumed by a process to its age.\nThe only situation where this might be a useful measure would be for multithreaded processes, where the \"maximum CPU usage\" is the maximum number of threads belonging to the process which are all running simultaneously. I'm not aware of any specific way to measure this.","Q_Score":0,"Tags":"python,linux,cpu-usage","A_Id":57964470,"CreationDate":"2019-09-16T12:39:00.000","Title":"Getting the max CPU \/ RAM usage for a process in Linux","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have an app for MacOS that is compiled with py2app. The app uses the pydub module and the latter uses ffmpeg family package. \nThe problem is that once I compile the app and move it to a different OS, the subprocess call from pydub fails to find any of the ffmpeg packages even though they are installed in \/usr\/local\/bin.\nIf I launch the app from terminal .\/Nameapp.app\/Contents\/MacOs\/Nameapp then it runs no problem, but if I launch it with double click then pydub complains not finding the packages and the app hangs where ffmpeg\/ffprobe should do the work.\nI can see that pydub searches in the \/usr\/local\/bin only if launched from terminal, otherwise no. If I add \/usr\/local\/bin to PATH, pydub doesnt complain anymore that it doesnt find ffmpeg\/ffprobe, but it still gives me an error for both ffmpeg and ffprobe:  [Errno 2] No such file or directory:.\nIf I hardcode the path pydub.AudioSegment.converter = \"\/usr\/local\/bin\/ffmpeg\", the app gives me only ffprobe error [Errno 2] No such file or directory:'ffprobe': 'ffprobe'.\nOn some other posts i've seen pydub.AudioSegment.ffprobe = \"\/path\/to\/ffprobe\" but it doesnt seem to work in my case?\nSo my two questions are:\nHow to hardcode the ffprobe path in pydub?\nHow to solve this without hardcoding path?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":172,"Q_Id":58000698,"Users Score":0,"Answer":"for some reason it works when changing the shell to zsh... switching back to bash no. not really happy with this solution but it's something","Q_Score":0,"Tags":"python-3.x,ffmpeg,py2app,pydub","A_Id":58042215,"CreationDate":"2019-09-18T21:03:00.000","Title":"pydub no ffprobe found","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am using Python script (pymongo) to export collection from MongoDB and ingesting to other database. This workflow is scheduled to run once a day using Apache Airflow. Every time script run its exports whole collection and overwrite the whole data at target but I want to fetch only the changes made to collection in subsequent execution of script, especially new documents added to collection.\nI have read other related questions but there \"change streams\" is suggested as solution but \"change stream\" is for real time. I want periodic updates for examples fetch the new documents added since the last execution of script. \nDo I have to download and scan the whole new updated collection and compare it with the old collection?","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":212,"Q_Id":58005421,"Users Score":1,"Answer":"Create a lookup table or collection where it saves the last run time and if the documents in the collection have timestamp then save the timestamp and _id in the very same lookup table.\nIf there aren't any timestamps in the documents then you can use the _id but the object ids in increasing order here are because the spec says that \ntime|machine|pid|inc is the format for creating the ObjectId.\nThere is already a time component in the ObjectId, but that is in seconds. The Date type in Mongo is the representation of the number of milliseconds from the epoch, which will give you some more precision for figuring out the time of insertion.\nI recommend to use a counter in the form of Sequence numbers if you need absolute precision beyond milliseconds and store the last sequence and the next run get query it by greater than to only get the delta data.","Q_Score":1,"Tags":"python,mongodb,pymongo,airflow","A_Id":58005686,"CreationDate":"2019-09-19T07:00:00.000","Title":"How to check for changes in collection periodically","Data Science and Machine Learning":0,"Database and SQL":1,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm trying to setup a python script that uses the requests library to get data from a website. The script works without issues running in a virtual environment on my windows 10 pc or on a azure vm. \nHowever, when I try to create a docker container using the python:3.6-slim image I get DH_KEY_TOO_SMALL errors. Testing the website on ssllabs.com revealed that it supports weak DH key exchange parameters. What could be causing this error and how can I fix it?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":2231,"Q_Id":58011032,"Users Score":4,"Answer":"I've managed to fix the issue. The problem was caused by openssl versions. Both my windows 10 pc and ubuntu 18.04 vm run an older version that had no problem connecting to the website. The python docker images contain a newer version of openssl that refused to connect.","Q_Score":4,"Tags":"python,docker,openssl,python-requests","A_Id":58012193,"CreationDate":"2019-09-19T12:26:00.000","Title":"Docker python requests results in DH KEY TOO SMALL error","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am using Celery with a RabbitMQ server. I have a publisher, which could potentially be terminated by a SIGKILL and since this signal cannot be watched, I cannot revoke the tasks. What would be a common approach to revoke the tasks where the publisher is not alive anymore?\nI experimented with an interval on the worker side, but the publisher is obviously not registered as a worker, so I don't know how I can detect a timeout","AnswerCount":3,"Available Count":2,"Score":1.0,"is_accepted":false,"ViewCount":152,"Q_Id":58017144,"Users Score":6,"Answer":"There's nothing built-in to celery to monitor the producer \/ publisher status -- only the worker \/ consumer status.  There are other alternatives that you can consider, for example by using a redis expiring key that has to be updated periodically by the publisher that can serve as a proxy for whether a publisher is alive.  And then in the task checking to see if the flag for a publisher still exists within redis, and if it doesn't the task returns doing nothing.","Q_Score":8,"Tags":"python,rabbitmq,celery","A_Id":58053094,"CreationDate":"2019-09-19T18:35:00.000","Title":"Tasks linger in celery amqp when publisher is terminated","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I am using Celery with a RabbitMQ server. I have a publisher, which could potentially be terminated by a SIGKILL and since this signal cannot be watched, I cannot revoke the tasks. What would be a common approach to revoke the tasks where the publisher is not alive anymore?\nI experimented with an interval on the worker side, but the publisher is obviously not registered as a worker, so I don't know how I can detect a timeout","AnswerCount":3,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":152,"Q_Id":58017144,"Users Score":4,"Answer":"Another solution, which works in my case, is to add the next task only if the current processed ones are finished. In this case the queue doesn't fill up.","Q_Score":8,"Tags":"python,rabbitmq,celery","A_Id":58107564,"CreationDate":"2019-09-19T18:35:00.000","Title":"Tasks linger in celery amqp when publisher is terminated","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I am working on a project through PyCharm. When I started the project, the project interpreter was a newly created virtualenv located in my project folder at \/path\/to\/project_folder\/venv and using base interpreter \/usr\/bin\/python3.6.\nWhen working in PyCharm, the Python Console seems to be using the right venv\/Python executable etc. Running os.system(\"which python\") returns \/usr\/bin\/python.\nNext, I activate this venv through my terminal (on Ubuntu 18.04) using the command source \/path\/to\/project_folder\/venv\/bin\/activate which works fine and shows me that it is activated with a (venv). However, if I run which python, it returns \/home\/user\/anaconda3\/bin\/python.\nWhy is this occurring? How can I access the same Python interpreter from the PyCharm console through my Ubuntu terminal?","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":491,"Q_Id":58030455,"Users Score":1,"Answer":"Same happened to me in a specific project.\nSymptoms:\n\nNo executable taken from the venv; i.e:\nwhich python3 from bash is not taken from venv\nPython packages are not working from venv\n\nCause:\n\nYou renamed your project folder\nVirtual environment PATH keeps old path to venv\nIt fails silently\n\nSolutions:\n\nCreate a new venv and reinstall requirements, OR\nRename folder to its old name\n\nChange PATH is not the solution. venv script creates some other routes in various files.\nNote: Tested with python3 -m venv venv","Q_Score":1,"Tags":"python,linux,pycharm,virtualenv","A_Id":66087846,"CreationDate":"2019-09-20T14:35:00.000","Title":"Activated virtual environment using incorrect Python executable","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I cannot upgrade pip on my Mac from the Terminal. \nAccording to the documentation I have to type the command:\npip install -U pip\nI get the error message in the Terminal:\npip: command not found\nI have Mac OS 10.14.2, python 3.7.2 and pip 18.1.\nI want to upgrade to pip 19.2.3","AnswerCount":9,"Available Count":3,"Score":0.0665680765,"is_accepted":false,"ViewCount":36951,"Q_Id":58060961,"Users Score":3,"Answer":"I have found an answer that worked for me:\nsudo pip3 install -U pip --ignore-installed pip\nThis installed pip version 19.2.3 correctly.\nIt was very hard to find the correct command on the internet...glad I can share it now.\nThanks.","Q_Score":5,"Tags":"python-3.x","A_Id":58065406,"CreationDate":"2019-09-23T11:00:00.000","Title":"how do I upgrade pip on Mac?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I cannot upgrade pip on my Mac from the Terminal. \nAccording to the documentation I have to type the command:\npip install -U pip\nI get the error message in the Terminal:\npip: command not found\nI have Mac OS 10.14.2, python 3.7.2 and pip 18.1.\nI want to upgrade to pip 19.2.3","AnswerCount":9,"Available Count":3,"Score":0.0,"is_accepted":false,"ViewCount":36951,"Q_Id":58060961,"Users Score":0,"Answer":"I came on here to figure out the same thing but none of this things seemed to work. so I went back and looked how they were telling me to upgrade it but I still did not get it. So I just started trying things and next thing you know I seen the downloading lines and it told me that my pip was upgraded. what I used was (pip3 install -- upgrade pip). I hope this can help anyone else in need.","Q_Score":5,"Tags":"python-3.x","A_Id":63387903,"CreationDate":"2019-09-23T11:00:00.000","Title":"how do I upgrade pip on Mac?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I cannot upgrade pip on my Mac from the Terminal. \nAccording to the documentation I have to type the command:\npip install -U pip\nI get the error message in the Terminal:\npip: command not found\nI have Mac OS 10.14.2, python 3.7.2 and pip 18.1.\nI want to upgrade to pip 19.2.3","AnswerCount":9,"Available Count":3,"Score":1.0,"is_accepted":false,"ViewCount":36951,"Q_Id":58060961,"Users Score":10,"Answer":"pip3 install --upgrade pip\n\nthis works for me!","Q_Score":5,"Tags":"python-3.x","A_Id":61442850,"CreationDate":"2019-09-23T11:00:00.000","Title":"how do I upgrade pip on Mac?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am running a python application which is running inside a docker container using Beanstalk in a private subnet, and I want to get the Private\/Local IP of the EC2 instance. Is it possible to get the Local IP address without using curl http:\/\/169.254.169.254\/latest\/meta-data\/local-ipv4 inside a docker container.\nAlthough I tried docker run --net=host <image_name> but still its not accessible.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":404,"Q_Id":58064056,"Users Score":0,"Answer":"You can get the local ip of a Linux instance with this command:\nhostname -I | awk '{print $1}'\nFor EB, use .ebexentions and write a bash script in a script_name.config to run: export HOST_IP=$(hostname -I | awk '{print $1}')","Q_Score":1,"Tags":"python-3.x,amazon-web-services,docker,amazon-ec2,amazon-elastic-beanstalk","A_Id":58065828,"CreationDate":"2019-09-23T13:54:00.000","Title":"How to get EC2 instance private IP in a private subnet?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"In Hadoop streaming - where the Mapper and Reducer are written in python - Does it help to make the Mapper process use the multiprocessing module? Or does the scheduler prevent the Mapper scripts from running on multiple threads on the compute nodes?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":285,"Q_Id":58066277,"Users Score":1,"Answer":"In classic MapReduce there is nothing that stops you from having multiple threads in a mapper or a reducer. The same is true for Hadoop Streaming, you can very well have multiple threads per mapper or reducer. This situation can happen if you have a CPU heavy job and want to speed it up. \nIf you're doing Hadoop Streaming with Python, you can use the multiprocessing module to speed up your mapper phase. \nNote that depending on the way your Hadoop cluster is configured (how many JVM mapper\/reducer per nodes) you may have to adjust the maximum number of processes you can use.","Q_Score":1,"Tags":"python-3.x,hadoop-streaming","A_Id":58190025,"CreationDate":"2019-09-23T16:07:00.000","Title":"Does python multiprocessing work with Hadoop streaming?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Python flawfinder module is working in bash but not working in Windows command commandline. Here are the steps I followed:\n\nPython installation path - C\/Users\/xyz\/AppData\/Local\/Programs\/Python\/Python37-32\/python\npip install flawfinder\nWhen I type flawfinder in commandline, it gives below error:\n\nflawfinder is not recognized as an internal or external command,\n  operable program or batch file.","AnswerCount":2,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":533,"Q_Id":58073861,"Users Score":1,"Answer":"Since version 2.0.16 released 2021-05-31 flawfinder also works on windows as expected.","Q_Score":1,"Tags":"python,python-3.x,flawfinder","A_Id":70070491,"CreationDate":"2019-09-24T05:55:00.000","Title":"Python: Why flawfinder module is not working in cmd windows?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a problem with argcomplete script after I create bundle with pyinstaller. I generate sh from my script, use pyinstaller, copy it to \/usr\/bin change script complete command. And this isn't working, if I do this with py file, this works fine, where I do mistake? Or maybe this isn't possible to get with that script autocomplete?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":149,"Q_Id":58075926,"Users Score":0,"Answer":"I found solution on myself, if someone will looking for that.\nFor global argcomplete it's simply just paste your bash script output from argcomplete to \/etc\/bash_completion.d\/<Your_sh_autocomplete_name>\nFor local (user usage) argcomplete it requires two steps. Add file into ~\/.bash_completion.d\/<Your_sh_autocomplete_name> and add source: source ~\/.bash_completion.d\/<Your_sh_autocomplete_name>. If it should autocomplete any time whenever you using bash shell, then command with source you can add to ~\/.bashrc file: echo \"source ~\/.bash_completion.d\/<Your_sh_autocomplete_name>\" >> ~\/.bashrc.\nAnd that's all, i missed for secound step when i want to do it local. So it isn't argcomplete or pyinstaller problem :)","Q_Score":0,"Tags":"python,bash,autocomplete,pyinstaller","A_Id":58118988,"CreationDate":"2019-09-24T08:17:00.000","Title":"python argcomplete and pyinstaller","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to execute simple python script through command activity stage, but I am getting error as below:\nsequence1..JobControl (@Execute_Command_4): Executed: python \/home\/mobaxterm\/pyth.py\nReply=1\nOutput from command ====>\n'python' is not recognized as an internal or external command,\noperable program or batch file.\nNote : Version is Datastage 11.3 ( causing problem )\nSuggest your views. Thank you very much for your help.","AnswerCount":1,"Available Count":1,"Score":-0.537049567,"is_accepted":false,"ViewCount":1547,"Q_Id":58088261,"Users Score":-3,"Answer":"you can use a OS script to call your python script","Q_Score":0,"Tags":"python,datastage","A_Id":63755764,"CreationDate":"2019-09-24T21:17:00.000","Title":"Can we write python scripts through datastage sequence stage like execute command activity in 11.3 version?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am experiencing performance issues in my pipeline in a DoFn that uses large side input of ~ 1GB. The side input is passed using the pvalue.AsList(), which forces materialization of the side input.\nThe execution graph of the pipeline shows that the particular step spends most of the time for reading the side input. The total amount of data read exceeds the size of the side input by far. Consequently, I conclude that the side input does not fit into memory \/ cache of the workers even though their RAM is sufficient (using n1-highmem4 workers with 26 GB RAM).\nHow do I know how big this cache actually is? Is there a way to control its size using Beam Python SDK 2.15.0 (like there was the pipeline option --workerCacheMb=200 for Java 1.x SDK)?\nThere is no easy way of shrinking my side input more than 10%.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":305,"Q_Id":58099163,"Users Score":0,"Answer":"If you are using AsList, you are correct that the whole side input should be loaded into memory. It may be that your worker has enough memory available, but it just takes very long to read 1GB of data into the list. Also, the size of the data that is read depends on the encoding of it. If you can share more details about your algorithm, we can try to figure out how to write a pipeline that may run more efficiently.\n\nAnother option may be to have an external service to keep your side input - for instance, a Redis instance that you write to on one side, and red from on the other side.","Q_Score":1,"Tags":"python,google-cloud-dataflow","A_Id":58103855,"CreationDate":"2019-09-25T13:06:00.000","Title":"Dataflow Sideinputs - Worker Cache Size in SDK 2.x","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have uninstalled Python and now I cant install it anymore (error 0x800705b4). Has anybody encountered this error ? I have tried different versions but nothing works.","AnswerCount":3,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":237,"Q_Id":58101490,"Users Score":0,"Answer":"Eventually what did the trick for me was to roll back the previous microsoft update (KB4512575)","Q_Score":0,"Tags":"python","A_Id":58118320,"CreationDate":"2019-09-25T15:06:00.000","Title":"How to install Python on Windows 10","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Add or delete tasks to celery through the management side, do not restart celery, how to let celery perform newly added tasks. How should I do it, thank you very much for helping me.  \nCelery version is 4.2.2","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":127,"Q_Id":58111595,"Users Score":0,"Answer":"Celery does not provide API to do this for a good reason - it is extremely hard to do right. What if your task needs few extra dependencies and one of them needs a shared library installed on the system? What if it needs to be built from the source?\nAs a matter of fact, there is no distributed system that does this that I know of (if someone does, please enlighten me). Instead, nowadays it is very easy to replace all workers with new ones that have one or more tasks removed\/added using Docker containers for an example.","Q_Score":0,"Tags":"python-2.7,celery","A_Id":58112458,"CreationDate":"2019-09-26T07:26:00.000","Title":"How to dynamically add or delete tasks to celery without restarting celery","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"When i run a make file on cygwin, there is Access is denied error.\nThere is a manifest file, input and output file passed as command line arguments to python script\n\npython3 C:\/git\/tool.py -m .\/config\/manifest.txt -i drv.bin -o drv_out.bin\nprocess_begin: CreateProcess(C:\\cygwin64\\bin\\python3, python3 C:\/git\/tool.py -m .\/config\/manifest.txt -i drv.bin -o drv.bin, ...) failed.\nmake (e=5): Access is denied.\n\nEdit: make version\n\nmake --version\nGNU Make 4.2.1 plus updates till 2017-June-04\nBuilt for Windows32","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":601,"Q_Id":58118129,"Users Score":0,"Answer":"Thanks everyone for helping and commenting out.\nI have installed cygwin long time back and the new make file is not compatible with the make version installed in cygwin.\nI had to update the make binary to latest version to build.","Q_Score":0,"Tags":"python,python-3.x,makefile,cygwin,access-denied","A_Id":58187509,"CreationDate":"2019-09-26T13:38:00.000","Title":"python3 make (e=5): Access is denied","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I read somewhere you could run python without an OS. How would I do this? Would I need to compile it? Can I run it raw? And if I did need to compile it, what tool would I use and what format would I compile it to?","AnswerCount":2,"Available Count":1,"Score":0.2913126125,"is_accepted":false,"ViewCount":736,"Q_Id":58157080,"Users Score":3,"Answer":"As far as I know there's not really any way to do this easily but I could be wrong.  There are \"portable\" versions of python but these are operating system dependent. I think what you're referencing is some guys at PyCon managed to run python from the GRUB Bootloader.  Your best bet would be installing some minimalist Linux distribution, with essentially only Python and some core packages required to run.  The problem is that there's a lot of types of hardware out there, all with their own drivers and assembly language.  Python can work as a low level language when you need it to but it seems like configuration would be a nightmare.  I haven't looked into it super thoroughly but it seems difficult and impractical. Having an OS above python gives you access to the package managers IDEs and compilier options that make python worth using.","Q_Score":1,"Tags":"python","A_Id":58157170,"CreationDate":"2019-09-29T16:24:00.000","Title":"How do I run python without an OS","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying python --version in my windows subsystem for linux terminal and it is showing me 2.7.15 whereas I do not have 2.7 in my system. I have python 3.6 set in my environment variable, and that is the python interpreter I have used till date. Suddenly after restarting my system I could see that version is 2.7. How do I change  the version of python and set it to my original interpreter ? I have tried  sudo apt update && upgrade and then sudo apt install python3 python3-pip ipython3. Did not help.  Please help.","AnswerCount":4,"Available Count":3,"Score":0.0,"is_accepted":false,"ViewCount":86,"Q_Id":58164034,"Users Score":0,"Answer":"Try python3 --version or python3.6 --version","Q_Score":0,"Tags":"python,windows-subsystem-for-linux","A_Id":58164113,"CreationDate":"2019-09-30T08:22:00.000","Title":"Not being able to change version of python from 2.7-3.6","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying python --version in my windows subsystem for linux terminal and it is showing me 2.7.15 whereas I do not have 2.7 in my system. I have python 3.6 set in my environment variable, and that is the python interpreter I have used till date. Suddenly after restarting my system I could see that version is 2.7. How do I change  the version of python and set it to my original interpreter ? I have tried  sudo apt update && upgrade and then sudo apt install python3 python3-pip ipython3. Did not help.  Please help.","AnswerCount":4,"Available Count":3,"Score":0.0,"is_accepted":false,"ViewCount":86,"Q_Id":58164034,"Users Score":0,"Answer":"You can use python3 as python3 orpython3.6 \nIf you still want to use python3 with the python command, edit your ~\/.bash_profile file and add line alias python='python3' and restart terminal","Q_Score":0,"Tags":"python,windows-subsystem-for-linux","A_Id":58164184,"CreationDate":"2019-09-30T08:22:00.000","Title":"Not being able to change version of python from 2.7-3.6","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying python --version in my windows subsystem for linux terminal and it is showing me 2.7.15 whereas I do not have 2.7 in my system. I have python 3.6 set in my environment variable, and that is the python interpreter I have used till date. Suddenly after restarting my system I could see that version is 2.7. How do I change  the version of python and set it to my original interpreter ? I have tried  sudo apt update && upgrade and then sudo apt install python3 python3-pip ipython3. Did not help.  Please help.","AnswerCount":4,"Available Count":3,"Score":0.0,"is_accepted":false,"ViewCount":86,"Q_Id":58164034,"Users Score":0,"Answer":"you can try using alternatives install python 3.6\nand try \n# alternatives --config python\nand choose the alternative version","Q_Score":0,"Tags":"python,windows-subsystem-for-linux","A_Id":58164607,"CreationDate":"2019-09-30T08:22:00.000","Title":"Not being able to change version of python from 2.7-3.6","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to implement 3 flask docker containers using docker-compose. I'm running each flask app on a different port 127.0.0.1:5000,127.0.0.1:5001,127.0.0.1:5002. I've mentioned the containers in docker-compose.yml file. The docker-compose is creating a default network.\nBut when I try to access 5001 container's flask endpoint from 5000 container's code like \nrequests.get('http:\/\/127.0.0.1:5001\/endpoint'), It is throwing following error.\n\nHTTPConnectionPool(host=\\'0.0.0.0\\', port=5001): Max retries exceeded\n  with url (Caused by NewConnectionError\n\nDoes anyone know why I'm getting this.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":1227,"Q_Id":58169484,"Users Score":3,"Answer":"That is because you are attempting to connect to localhost within the docker container itself, i.e. the traffic stays within that docker container.\nWhat you want to do instead is to connect to your other container by its hostname. Within the context of the network managed by docker\/docker-compose that is just the name of the docker container. E.g. for a container foo you can connect over HTTP to port 5001 using http:\/\/foo:5001\/ inside your container.","Q_Score":0,"Tags":"python-3.x,docker,flask,docker-compose,docker-networking","A_Id":58169539,"CreationDate":"2019-09-30T14:00:00.000","Title":"How to call an endpoint of one container from another flask container running on different ports in docker compose?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I am on a Ubuntu machine. I installed Jupyter Notebook using the following command. \n\nsudo snap install jupyter\n\nBut Jupyter cannot find any of the installed python packages which were installed using terminal. I checked if jupyter and terminal are pointing to same python installation using this code. \n\nimport sys; print(sys.executable)\n\nTerminal shows this output.\n\n'\/usr\/bin\/python3'\n\nAnd Jupyter shows this one. \n\n'\/snap\/jupyter\/6\/bin\/python'\n\nNow I want the jupyter to point the same installation path as the terminal shows. How can I do that?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":655,"Q_Id":58179930,"Users Score":3,"Answer":"your jupyter is not placed in default packages location due to installing it with snap. install jupyter with pip this way: pip install jupyter\nif you dont have pip then download it. it usually is included in python package","Q_Score":2,"Tags":"python,jupyter-notebook","A_Id":58180176,"CreationDate":"2019-10-01T07:26:00.000","Title":"How to make Jupyter Notebook to point to the same Python installation as Terminal on Ubuntu?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am facing a really unexpected error and I am wondering if anybody else has had that before.\nThe setup I am using is the following: macOS 10.14.6 with Python 3.7\nI am also using ipython and spyder, but its unrelated to my problem as it happens in the normal python shell, as well.\nI have a module called FLAP and several submodules which all rely on the main FLAP module. They are in the same directory called git-repos. I added git-repos to the PYTHONPATH in spyder (or to sys.path in python shell).\nIf I only have the spyder's ipython shell or just a python shell opened, I can import my own modules.\nAs soon as I open the git-repos folder with e.g. Commander One, python cannot import the modules. I also tried using the Sourcetree git client, that induced the same thing. If I exit the folder in the Commander One app, then it can be imported again after restarting the python shell.\nFurthermore, I find it strange that it doesn't happen with macOS's Finder and also doesn't happen with installed packages like matplotlib or numpy.\nI think it is also important to mention, that the whole directory is in a Google Drive Filestream mounted into \/Volumes.\nHave you guys ever seen this kind of problem before?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":95,"Q_Id":58207355,"Users Score":1,"Answer":"It turned out that you cannot do the following in macOS:\n\nHave your module directory in a Google Drive File Stream and\nHave that directory in the PYTHONPATH and\nOpen the same directory in e.g. Commander One and\nBe able to import the module in python\n\nYou can do 3. OR 4. but not 3. AND 4. If condition one is not true then you can import the module no matter what.\nThis is a bug in the macOS Google Drive software. The folder seems to be locked down when it is opened in another app (not Finder) and thus the python shell cannot find it.\nAt the end I moved the folder from the Google Drive onto my drive and I can import it no matter what. I fired up a crontab record so it would backup my codes regularly to the drive. \nI spent three days on trying to find the source of the error. I think this could help other people who face this very specific issue.","Q_Score":0,"Tags":"python,macos,import,module,spyder","A_Id":58208192,"CreationDate":"2019-10-02T18:29:00.000","Title":"Cannot import my own module in python if its folder is opened in another application","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Package management and juggling pip, anaconda, PPAs, and virtual-environments is difficult. Somewhere in my constellation of dependencies, things are broken. I'm on Ubuntu 18.04. As far as I know, I cannot fix these dependencies by hand.\nThe problem, for what it's worth: I've been unable to use tensorflow for a few months. Every time I try to fix it, even uninstalling and reinstalling everything to the best of my knowledge, things still don't work. After sinking enough hours, I'm looking for a \"nuclear solution\".\nWhat I would like to do is cleanly remove everything except Python and any Python packages my system might require, so that I can start fresh (and hopefully do things properly.)\nSo, my question: How can I systematically clean up or remove my Python installation? I want to wipe everything and start anew. Does there exist a systematic guide, or a smart and reputable script that does this?","AnswerCount":3,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":24080,"Q_Id":58209488,"Users Score":3,"Answer":"You can try sudo apt purge python-pip python-dev, or python3 and python3-pip if you're using Python 3. This must remove all files\/folders created by the installed packages. But I'm not really sure you need to do it. \nThe better solution is just to uninstall all pip packages, like pip freeze | xargs pip uninstall -y. Just to be sure you can even remove pip folder \/usr\/lib\/python2.7\/site-packages manually (or similar folder for Python 3).","Q_Score":12,"Tags":"python,pip,anaconda,apt","A_Id":58209958,"CreationDate":"2019-10-02T21:17:00.000","Title":"How do I completely clean-up or reset a Python installation on Ubuntu","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a django project which is working fine. However, this question can be related to any django project.\nDjango works in a way that after running python manage.py runserver the project is accessible at localhost:8000. But when you deliver the project to the customer you cannot expect them to open command windows every time, then run python manage.py runserver, then open a browser, then type localhost:8000 and etc.\nI have heard docker might be a solution to this. But docker will need the scripts available in the local machine. I am talking about making a full installation file like when you buy a video game and the scripts are not accessible easily (seems there are binary files).\nThe real question is how can we protect our code and scripts and be sure they cannot be accessed easily after we have installed them in a customer's computer?\nEdit: My client is the service provider who will host the project for its own clients. That is why I am seeking to deliver the project in a way that is at least different from just copying and pasting everything.","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":1032,"Q_Id":58216039,"Users Score":0,"Answer":"Django is webdevelopment framework. So it enables you to make web applications, not native apps (like the video games you've mentioned).\nOnce you feel you have a releasable product (build with django) and you would like your customers to acces your django website\/application you should deploy it to a public server\/host. That way your customers only need to open there browsers and go to your application. \nYou can do this a 100 different ways with a 1000 different setups, depending on the usage and complexity of your (web)application. To do this you need to know a little bit about system administration. There are a ton of tutorials online on how to deploy django projects.\nMost important for you to learn is that you build a webapplications with Django wich can be taken in production by publishing it on the web and not by downloading some .exe file.","Q_Score":1,"Tags":"python,django,docker,installation","A_Id":58216284,"CreationDate":"2019-10-03T09:20:00.000","Title":"What is the best way to deliver django project as a full installation file (setup.exe) to be user-friendly and not revealing your whole scripts?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"How to safely uninstall Python 2.7.10 from MacOS 10.14.6 or higher? \nI have already installed Python 3.7.4 and I want to use only this version.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":334,"Q_Id":58220681,"Users Score":2,"Answer":"Do not remove python 2.7. You can change your preferences to which one to use with certain programs but there are a lot of dependencies on OS that need python 2.7 to run.","Q_Score":0,"Tags":"python,python-3.x,macos,python-2.7,uninstallation","A_Id":58221084,"CreationDate":"2019-10-03T13:54:00.000","Title":"Uninstall Python 2 from Mac","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a Python program that can update itself from a GitHub repository. When I activate the updating process, the Python script runs updater.bash script and kills itself. The bash script updates the program and then runs it again. But it keeps running despite I put exit 0 in the end of the updater. So, every update creates another bash script that eats more resources.\nHow can I kill the script after it runs the Python script?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":165,"Q_Id":58241340,"Users Score":2,"Answer":"exec python ... to replace bash with python program.\nSee: help exec","Q_Score":1,"Tags":"python,linux,bash,unix,exec","A_Id":58241389,"CreationDate":"2019-10-04T18:09:00.000","Title":"How to exit a bash script after it starts a Python process?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"When I create a symbolic link in an external drive on my mac I create a file shown below\n\nXSym\n0077\n767acf6f896cdeab83e4f3fe919d4929\n\/Volumes\/externaldrivename\/path\/to\/audiofile\/test.wav\n\nIf I move my external drive and connect to a linux machine the path of the test.wav file would be\n\n\/media\/username\/externaldrivename\/path\/to\/audiofile\/test.wav\n\nThis causes the symbolic link to break.\nis it possible to not have the link break by somehow setting an environment path within the xSym file so that the file path would be the same on both machines?\nSpecifically with a python command?","AnswerCount":2,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":283,"Q_Id":58243357,"Users Score":1,"Answer":"You can create a symlink with relative path if that serves your purpose.","Q_Score":0,"Tags":"python,path,operating-system,symlink","A_Id":58243382,"CreationDate":"2019-10-04T21:27:00.000","Title":"create symlinks in external drive that doesn't break when moving between computers","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I currently have Airflow set up and working correctly using the CeleryExecutor as a backend to provide horizontal scaling. This works remarkably well especially when having the worker nodes sit in an autoscaling group on EC2.\nIn addition to Airflow, I use plain Celery to handle simple asynchronous tasks (that don't need a whole pipeline) coming from Flask\/Python. Until now, these plain Celery tasks were very low volume and I just ran the plain Celery worker on the same machine as Flask. There is now a requirement to run a massive number of plain Celery tasks in the system, so I need to scale my plain Celery as well.\nOne way to do this would be to run the plain Celery worker service on the Airflow worker servers as well (to benefit from the autoscaling etc.) but this doesn't seem to be an elegant solution since it creates two different \"types\" of Celery worker on the same machine. My question is whether there is some combination of configuration settings I can pass to my plain Celery app that will cause @celery.task decorated functions to be executed directly on my Airflow worker cluster as a plain Celery task, completely bypassing the Airflow middleware.\nThanks for the help.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":914,"Q_Id":58247023,"Users Score":0,"Answer":"The application is airflow.executors.celery_executor.app if I remember well. Try celery -A airflow.executors.celery_executor.app inspect active for an example in your current Airflow infrastructure to test it. However, I suggest you do not do this because your Celery tasks may affect the execution of Airflow DAGs, and it may affect the SLAs.\nWhat we do in the company I work for is exactly what you suggested - we maintain a large Celery cluster, and we sometimes offload execution of some Airflow tasks to our Celery cluster, depending on the use-case. This is particularly handy when a task in our Airflow DAG actually triggers tens of thousands of small jobs. Our Celery cluster runs 8 million tasks on a busy day.","Q_Score":1,"Tags":"python,flask,celery,airflow","A_Id":58247402,"CreationDate":"2019-10-05T09:30:00.000","Title":"How to execute plain Celery tasks on Airflow workers","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I have running code in my home directory in Jupyter notebook. I'd like to import some data from an external drive, as the data is too large to be stored on my local drive. I am unable to import this data into my notebook.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":990,"Q_Id":58250882,"Users Score":0,"Answer":"If you can browse to the data using Finder, you should be able to load the data into your Jupyter notebook.\nYour code to open a file in your notebook probably looks something like this:\nwith open(\"data.txt\",\"r\") as dataFile:\nYou need to replace data.txt with the path to the file you want to open. \nOne way to get the path name is to navigate to the file in Finder and then drag the file into your Terminal. The path to the file will then be pasted into the command prompt of the Terminal.\nThe path may look something like this:  \/Volumes\/Remove\/Data\/bigfile.txt\nYou can also navigate to the file using the cd command in the Terminal.\nYou may even be able to drag the file directly into your Jupyter notebook to get the path.  \nHope this helps!","Q_Score":1,"Tags":"python-3.x,jupyter-notebook","A_Id":58251069,"CreationDate":"2019-10-05T17:50:00.000","Title":"How can I load data from an external drive into a Jupyter notebook on MacOs?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"MY cmd doesn't show that Python is installed and gives me an error \nI changed the PATH and it's this--> C:\\Users\\sewmini\\Documents\\Python\nThe error I get is \"'python' is not recognized as an internal or external command,\noperable program or batch file.\"","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":42,"Q_Id":58253697,"Users Score":0,"Answer":"You must set your PATH to the python executable.\ni.e. 'C:\\Users\\PC\\AppData\\Local\\Programs\\Python\\Python37-32\\python.exe'","Q_Score":0,"Tags":"python","A_Id":58253709,"CreationDate":"2019-10-06T01:58:00.000","Title":"How to change the PATH of python?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'd like to start a new process using the subprocess module. I'd like the stdin to be a stream that never sends anything but also doesn't terminate. Basically the same kind of input stream that a program would get if I were to launch it in the shell and not type anything, ever. Is that possible?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":34,"Q_Id":58258365,"Users Score":0,"Answer":"Pass stdin=subprocess.PIPE to the Popen constructor, and then avoid doing anything -- like calling communicate() -- which would later close that FIFO.","Q_Score":2,"Tags":"python,subprocess","A_Id":58258398,"CreationDate":"2019-10-06T14:45:00.000","Title":"Python subprocess: Start a process with a `stdin` that doesn't close","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have to set up a worker which handles some data after a certain event happens. I know I can start the worker with python manage.py runworker my_worker, but what I would need is to start the worker in the same process as the main Django app on a separate thread.\nWhy do I need it in a separate thread and not in a separate process? Because the worker would perform a pretty light-weight job which would not overload the server's resources, and, moreover, the effort of making the set up for a new process in the production is not worth the gain in performance. In other words, I would prefer to keep it in the Django's process if possible.\nWhy not perform the job synchronously? Because it is a separate logic that needs the possibility to be extended, and it is out of the main HTTP request-reply scope. It is a post-processing task which doesn't interfere with the main logic. I need to decouple this task from an infrastructural point-of-view, not only logical (e.g. with plain signals).\nIs there any possibility provided by Django Channels to run a worker in such a way?\nWould there be any downsides to start the worker manually on a separate thread?\nRight now I have the setup for a message broker consumer thread (without using Channels), so I have the entry point for starting a new worker thread. But as I've seen from the Channel's runworker command, it loads the whole application, so it doesn't seem like a na\u00efve worker.run() call is the proper way to do it (I might be wrong with this one).","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":383,"Q_Id":58268408,"Users Score":0,"Answer":"I found an answer to my question.\nThe answer is no, you can't just start a worker within the same process. This is because the consumer needs to run inside an event loop thread and it is not good at all to have more than one event loop thread in the same process (Django WSGI application already runs the main thread with an event loop).\nThe best you can do is to start the worker in a separate process. As I mentioned in my question, I started a message broker consumer on a separate thread, which was not a good approach either, so I changed my configuration to start the consumers as separate processes.","Q_Score":1,"Tags":"python,django,multithreading,django-channels","A_Id":58323227,"CreationDate":"2019-10-07T11:11:00.000","Title":"Start a Django Channels Worker within the same process","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I am trying to serialize a bytes object - which is an initialization vector for my program's encryption. But, the Google Protocol Buffer only accepts strings. It seems like the error starts with casting bytes to string. Am I using the correct method to do this? Thank you for any help or guidance!\nOr also, can I make the Initialization Vector a string object for AES-CBC mode encryption?\nCode\n\nCast the bytes to a string\n\n\nstring_iv = str(bytes_iv, 'utf-8')\n\nSerialize the string using SerializeToString():\n\n\nserialized_iv = IV.SerializeToString()\n\nUse ParseToString() to recover the string:\n\n\nIV.ParseFromString( serialized_iv )\n\nAnd finally, UTF-8 encode the string back to bytes: \n\n\nbytes_iv = bytes(IV.string_iv, encoding= 'utf-8')\n\n\nError\nstring_iv = str(bytes_iv, 'utf-8')\nUnicodeDecodeError: 'utf-8' codec can't decode byte 0x9b in position 3: invalid start byte","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":769,"Q_Id":58274046,"Users Score":1,"Answer":"If you must cast an arbitrary bytes object to str, these are your option:\n\nsimply call str() on the object. It will turn it into repr form, ie. something that could be parsed as a bytes literal, eg. \"b'abc\\x00\\xffabc'\"\ndecode with \"latin1\". This will always work, even though it technically makes no sense if the data isn't text encoded with Latin-1.\nuse base64 or base85 encoding (the standard library has a base64 module wich covers both)","Q_Score":0,"Tags":"python-3.x,utf-8,type-conversion,encryption-symmetric,protocol-buffers","A_Id":58274931,"CreationDate":"2019-10-07T16:58:00.000","Title":"Using Protocol Buffer to Serialize Bytes Python3","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a problem when sending a cmd command in python. This command opens another tool, giving it some arguments. The problem is that the tool is opening, but also opens a cmd window, where I can see the message sent. If I close this cmd window, the tool will be closed, like a child process. This is odd: I just want to open the tool, without any cmd window being opened. \nIf I do it manually, by creating a .bat file which I double click, it works normally (a cmd is opened for 0.1 seconds while the tool is opening, without any cmd file still attached to the tool).\nBig picture: I've created a tool which will ask for some paths and then you can click \"start tool\", those paths are send as arguments to the tool which will be opened.","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":74,"Q_Id":58284751,"Users Score":1,"Answer":"There is no problem with the CMD window since whatever script you're writing is opening the applications which you're passing in arguments but through the CMD window only.\nAnd you talked about a batch file that too works via CMD window only. Please check the flow of your code and also note or find out how it works at the back end. Is it taking the help of CMD Window?","Q_Score":3,"Tags":"python,cmd","A_Id":58285053,"CreationDate":"2019-10-08T10:39:00.000","Title":"Python process a cmd command which opens another tool","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"By default when I type python in terminal it goes to python using the 2.7.x version. In oldest versions of macOS once I typed 'alias pyhton=python3' it changed forever and every time I typed python it goes to python version 3.\nBut in macOS Catalina, I need to type the statement every time I open the terminal.\nAny suggestion?","AnswerCount":3,"Available Count":1,"Score":0.0665680765,"is_accepted":false,"ViewCount":1461,"Q_Id":58285124,"Users Score":1,"Answer":"Catalina now uses zsh as the default rather than Bash. \nTo verify which shell you are using type echo $0 in the terminal\nAdd alias python='python3' to $HOME\/.zshrc","Q_Score":1,"Tags":"python,macos,terminal,macos-catalina","A_Id":58296982,"CreationDate":"2019-10-08T11:05:00.000","Title":"Problem with changing python statement with python3 in macOS Catalina","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am having hard time to install a python lib called python3-saml\nTo narrow down the problem I created a very simple application on ibm-cloud and I can deploy it without any problem, but when I add as a requirement the lib python3-saml \nI got an exception saying:\npkgconfig.pkgconfig.PackageNotFoundError: xmlsec1 not found\nThe above was a deployment on ibm-cloud, but I did try to install the same python lib locally and I got the same error message, locally I can see that I have the xmlsec1 installed.\nAny help on how to successfully deploy it on ibm-cloud using python3-saml?\nThanks in advance","AnswerCount":2,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":448,"Q_Id":58288228,"Users Score":2,"Answer":"I had a similar issue and I had to install the \"xmlsec1-devel\" on my CentOS system before installing the python package.","Q_Score":1,"Tags":"python,cloud,ibm-cloud,xmlsec1","A_Id":59429632,"CreationDate":"2019-10-08T14:18:00.000","Title":"xmlsec1 not found on ibm-cloud deployment","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I can open my ESP32 Vroom32 device made by Espressif with a cp2101 chip on Ubuntu. I used Ubuntu to flash Micropython onto it, however when I try to connect with Putty, MPFshell or anything else on Windows 10 it will not work. I downloaded and installed the recommended drivers for it and also updated Windows which was supposed to load the driver as well. I can see the device and COM port in device manager but when I attempt to connect I get blocked. For example on MPFshell I get the message \"Cannot connect to COM17\"","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":201,"Q_Id":58307073,"Users Score":0,"Answer":"It is a common reason for boards to show the \"Cannot Connect to COM\" error because of a bad USB cable.\nAlways check with another cable first, before getting deeper to the problem.","Q_Score":0,"Tags":"esp32,micropython","A_Id":58327904,"CreationDate":"2019-10-09T15:01:00.000","Title":"Cannot open COM port on ESP32 device. Using Windows10 and MPFShell","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I've just upgraded to macOS Catalina, I've used brew install dpkg, and homebrew decided it was time to run brew cleanup.\nAfter running it, I've not been able to run pip3 anymore.\nTried running brew doctor and brew reinstall python3, but none helped.\nRunning pip3 outputs this:\n[1]    26346 abort      pip3","AnswerCount":3,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":1785,"Q_Id":58321697,"Users Score":3,"Answer":"It turns out brew uninstall python3 does not really uninstalls it, had to remove \/usr\/local\/lib\/python3 to really remove the installation, and then reinstall python using brew install python3","Q_Score":2,"Tags":"python,macos,pip,homebrew","A_Id":58322938,"CreationDate":"2019-10-10T11:19:00.000","Title":"pip3 crashes on macOS","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to get some code working on mac and to do that I have been using an anaconda virtual environment. I have all of the dependencies loaded as well as my script, but I don't know how to execute my file in the virtual environment on mac. The python file is on my desktop so please let me know how to configure the path if I need to. Any help?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":54,"Q_Id":58368638,"Users Score":1,"Answer":"If you have a terminal open and are in your virtual environment then simply invoking the script should run it in your environment.","Q_Score":0,"Tags":"python,python-3.x,macos,anaconda","A_Id":58368730,"CreationDate":"2019-10-13T23:43:00.000","Title":"How to run a python script using an anaconda virtual environment on mac","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"When I first install packages to a virtual environment with pipenv install package and secondly try to open a subshell to operate in that environment with pipenv shell i receive the following: \n\"Shell for UNKNOWN_VIRTUAL_ENVIRONMENT already activated.\nNo action taken to avoid nested environments.\" \nHowever, which python returns the file path of the system python, which indicated that actually the virtual environment is not activated. \nctr+D and recalling pipenv shell finally opens a subshell within the virtual environment. Can someone explain me what's going on there? Honestly, I am severely conufused.","AnswerCount":1,"Available Count":1,"Score":1.0,"is_accepted":false,"ViewCount":2059,"Q_Id":58394338,"Users Score":7,"Answer":"just cd to the folder that has your venv (.venv, Pipfile, Pipfile.lock) and run exit.\nit will exit the folder and now you can again cd to the same folder and use pipenv shell. \nit will work","Q_Score":5,"Tags":"python,pipenv,virtual-environment","A_Id":61404601,"CreationDate":"2019-10-15T12:08:00.000","Title":"Using `pipenv shell` after `pipenv install` yields \"Shell for UNKNOWN_VIRTUAL_ENVIRONMENT already activated.\"","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I can upload single file to Azure blob storage with Python. But for a folder with multiple folders containing data, is there a way I can try to upload the whole folder with same directory to Azure? \n\nSay I have \nFOLDERA  \n    ------SUBFOLDERa \n    ----------filea.txt \n    ----------fileb.txt \n    ------SUBFOLDERb \n    ------SUBFOLDERc \n\nI want to put this FOLDERA as above structure to Azure. \nAny hints?","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":4459,"Q_Id":58394403,"Users Score":0,"Answer":"There is nothing built in, but you can easily write that functionality in your code (see os.walk).\nAnother option is to use the subprocess module to call into the azcopy command line tool.","Q_Score":2,"Tags":"python,azure,blobstorage","A_Id":58394491,"CreationDate":"2019-10-15T12:11:00.000","Title":"How to recursively upload folder to Azure blob storage with Python","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm working on a task that operates on a mounted partition when it has reached a certain percentage used, i.e. when 90% of the parition has been allocated, perform task X.\nIn order to test this, i'd like to be able to stub out a volume with a given size, so I can fill it with garbage up to the point that task X is carried out, so I can make sure it's doing what it's supposed to do. Is this even possible? I'm using python 2.7 on linux.\nThanks in advance.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":50,"Q_Id":58396273,"Users Score":0,"Answer":"Difficult to said with out your code, but you can mock the function used to retrived disk spaces and assign it a value higher than 90 %. Then test your task X.","Q_Score":0,"Tags":"python,testing,mocking","A_Id":58397161,"CreationDate":"2019-10-15T13:48:00.000","Title":"How to mock a mounted partition in Python","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have spent hours looking into this issue without any success.\nI've looked at various SO discussions and none seem to solve my problem so out of pure frustration here is my question...\nI'm trying to launch a script within a windows batch file. The problem is that when I do the script fails because it can not find some of the modules used.\nAfter various attempts I have found that the batch file aspect, at this stage, seems to be irrelevant.\nSo, ignoring batch files for a minute, If I run the script like this\n\npipenv run python myscript.py\n\nIt works. If I run the following it doesnt\n\npath-to-env\\Scripts\\activate\npython myscript.py\n\nIt returns an error ModuleNotFoundError: No module named 'xxx'\nIt activates the venv OK, but something is not right as it cant find code used in script\nWithin my IDE (Visual Code) everything works OK\nI do have quite a complicated directory structure but given that both the IDE and \"pipenv run python myscript.py\" work as expected it must be due to something else.\nAny ideas or pointers on where I need to be looking? I'm afraid my understanding of pipenv isnt up to solving this ;)\nEDIT\nIn my attempts to solve this I had added the line PYTHONPATH=. to my .env file. This seems to be responsible for allowing this line to work:\n\npipenv run python myscript.py\n\nIf I remove it, then the above ALSO generates the ModuleNotFoundError","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":346,"Q_Id":58398432,"Users Score":1,"Answer":"OK so after trying lots of various combinations I did finally manage to get this to work. \nAlthough I have no idea why this solution works and others didnt..\nIt requires two batch files.\nOne to launch the python script which will contain a line like this\n\npython myscript.py\n\nAnd another to create the env via pipenv and then call the first batch file\nIt will have a line like this\n\npipenv run \\path\\to\\first\\batchfile.bat\n\nThis combination works and can be successfully called from the Windows Task Scheduler","Q_Score":0,"Tags":"python,pipenv","A_Id":58419817,"CreationDate":"2019-10-15T15:46:00.000","Title":"Pipenv and ModuleNotFoundError","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have installed new ubuntu 18.4 and while solving some other error while installing requirements through pip. I tried installing python-setuptools and python-dev instead of installing python3-setuptools and python3-dev which in turn installed python2.7 on my machine. Well the solution didn't work and I removed the packages as I don't want 2.7 on my machine and now when I run the following command:\nsudo virtualenv venv \nI get this message: The path python2 (from --python=python2) does not exist.\nbefore installing python-dev and python-setup tools the above command worked fine.\nI have tried replacing python symbolic link to python3.6 in \/usr\/bin.\nby executing: ln -s \/usr\/bin\/python3.6 \/usr\/bin\/python although I am able to get python3.6 console every time run python like on fresh install of ubuntu but I can't creat virtual environment the same way.","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":251,"Q_Id":58410540,"Users Score":1,"Answer":"Try yo run it with this specific python\n\/usr\/bin\/python3.6 -m pip install virtualenv\nsudo \/usr\/bin\/python3.6 -m virtualenv venv\nand delete the python2.7 is probably a bad idea cause there is probably thing that using it on your machine, and also, consider reading about system envirmate varibles, as PATH for example that would solve you problem","Q_Score":1,"Tags":"python,python-3.x,virtualenv,ubuntu-18.04","A_Id":58410612,"CreationDate":"2019-10-16T09:54:00.000","Title":"virtualenv is not picking python3 automatically from \/usr\/bin","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm trying to set up a new dev environment on Windows 10. Let me set the stage with some key points:\nI am using Ubuntu through Windows Subsystem for Linux (WSL).\nI have Anaconda3 installed on WSL.\nI have PyCharm installed on Windows 10.\nI am attempting to use a Conda environment created in the WSL within PyCharm on Windows 10. For some reason I cannot find documentation or guidance on the process.\nI have already successfully setup a virtualenv within WSL as a remote interpreter for PyCharm however it will not allow me to do the same with a Conda environment.","AnswerCount":5,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":4661,"Q_Id":58416208,"Users Score":3,"Answer":"After some trial and error along with contacting JetBrains support, it was determined currently not possible.\nMy solution to get around this was to have Anaconda installed on both Windows and WSL and then create the Conda environment within Windows. I was then able to activate this environment within WSL with the absolute path to the environment.\nNot the best approach but allows for editing in WSL and usage of the interpreter in PyCharm.","Q_Score":8,"Tags":"python,pycharm,anaconda,windows-subsystem-for-linux","A_Id":59250319,"CreationDate":"2019-10-16T14:53:00.000","Title":"WSL Conda Environment in PyCharm","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm trying to set up a new dev environment on Windows 10. Let me set the stage with some key points:\nI am using Ubuntu through Windows Subsystem for Linux (WSL).\nI have Anaconda3 installed on WSL.\nI have PyCharm installed on Windows 10.\nI am attempting to use a Conda environment created in the WSL within PyCharm on Windows 10. For some reason I cannot find documentation or guidance on the process.\nI have already successfully setup a virtualenv within WSL as a remote interpreter for PyCharm however it will not allow me to do the same with a Conda environment.","AnswerCount":5,"Available Count":2,"Score":0.0399786803,"is_accepted":false,"ViewCount":4661,"Q_Id":58416208,"Users Score":1,"Answer":"In your project in Pycharm.\n\nChoose File, Setting, Project, Python Interpreter, Add\nChoose WSL on the left. Linux = your Ubuntu\nPython interpreter path = home\/<your_name>\/miniconda3\/envs\/<your_env>\/bin\/python3 -- this is the environment you have created in Ubuntu with Conda.","Q_Score":8,"Tags":"python,pycharm,anaconda,windows-subsystem-for-linux","A_Id":70721122,"CreationDate":"2019-10-16T14:53:00.000","Title":"WSL Conda Environment in PyCharm","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm trying to add directories to sys.path so Python looks there for modules. When I add a directory using append or insert command and then print out directories in sys.path, the directory I've just added is wrong. For example if I add \"C:\\Users\\user\\test\", in sys.path it's \"C:\\Users\\user   est\"\nIt's not just the problem with the name displayed incorrectly, because modules don't load, so the right directory must have not been added.\nI've tried commands: sys.path.append(\"xxx\") and sys.path.insert(0, \"xxx\"). I've tried single and double quotation marks, and forward and backward slashes.\nI'm using Anaconda Prompt (Anaconda 2) and Windows 10.","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":163,"Q_Id":58419238,"Users Score":0,"Answer":"Looks like you're not properly escaping backslashes. Without seeing your code, it's hard to diagnose it more accurately, but try creating the directory with the string user\\\\test instead. Otherwise, python might interpret \\t as an escape sequence, and replace it with a tab.","Q_Score":1,"Tags":"python,directory","A_Id":58419271,"CreationDate":"2019-10-16T18:04:00.000","Title":"Python sys.path appends wrong directories","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am using Appium version V1.15.0 and have already start the server successfully with the default Host: 0.0.0.0 and Port: 4723\nBut now when i try to start the server it shows me this error \"Error Starting Appium server: listen EADDRINUSE 0.0.0.0:4723\"\nI have tried to solve this issue by changing the port but could not find any solution.\nSuggest me if you guys have any better solution.","AnswerCount":4,"Available Count":3,"Score":0.1488850336,"is_accepted":false,"ViewCount":3805,"Q_Id":58424717,"Users Score":3,"Answer":"I have found the solution. After restarting my computer, i could successfully run the Appium server.\nIf anyone face the same problem. Please follow below steps:\n1. Check if the port is listening to any other services.\n      Open command prompt: Type netstat -a -b\n\nEither kill that service or try with different port.\nIf both not working then restart your machine.\n\nThis way i have solved this problem.","Q_Score":3,"Tags":"python-appium,appium-desktop","A_Id":58444163,"CreationDate":"2019-10-17T04:00:00.000","Title":"Could not start Appium server. It's showing [Error Starting appium server: listen EADDRINUSE 0.0.0.0:4723]","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I am using Appium version V1.15.0 and have already start the server successfully with the default Host: 0.0.0.0 and Port: 4723\nBut now when i try to start the server it shows me this error \"Error Starting Appium server: listen EADDRINUSE 0.0.0.0:4723\"\nI have tried to solve this issue by changing the port but could not find any solution.\nSuggest me if you guys have any better solution.","AnswerCount":4,"Available Count":3,"Score":0.1488850336,"is_accepted":false,"ViewCount":3805,"Q_Id":58424717,"Users Score":3,"Answer":"If EADDRINUSE, Address already in use is the issue, \ndo\nps aux | grep node\nto get the process ids.\nThen:\nkill -9 PID\nDoing the -9 on kill sends a SIGKILL.","Q_Score":3,"Tags":"python-appium,appium-desktop","A_Id":60395724,"CreationDate":"2019-10-17T04:00:00.000","Title":"Could not start Appium server. It's showing [Error Starting appium server: listen EADDRINUSE 0.0.0.0:4723]","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I am using Appium version V1.15.0 and have already start the server successfully with the default Host: 0.0.0.0 and Port: 4723\nBut now when i try to start the server it shows me this error \"Error Starting Appium server: listen EADDRINUSE 0.0.0.0:4723\"\nI have tried to solve this issue by changing the port but could not find any solution.\nSuggest me if you guys have any better solution.","AnswerCount":4,"Available Count":3,"Score":0.0,"is_accepted":false,"ViewCount":3805,"Q_Id":58424717,"Users Score":0,"Answer":"The following solution on windows worked for me\nC:\\Users\\username> taskkill \/F \/IM node.exe\nSUCCESS: The process \u201cnode.exe\u201d with PID 13992 has been terminated.","Q_Score":3,"Tags":"python-appium,appium-desktop","A_Id":71693131,"CreationDate":"2019-10-17T04:00:00.000","Title":"Could not start Appium server. It's showing [Error Starting appium server: listen EADDRINUSE 0.0.0.0:4723]","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I have a simple task I want to perform over ssh: return all files from a given file list that do not exist.\nThe way I would go about doing this would be to wrap the following in an ssh session:\nfor f in $(files); do stat $f > \/dev\/null ;done\nThe stdout redirect will ignore all good files and then reading the stderr will give me a list of all non found files.\nI first thought of using this bash code with the ssh part inside a subprocess.run(..., shell=True) but was discouraged to do so. Instead,paramikowas suggested. \nI try to understand why and when native python is better than subprocessing bash\n\nComputability with different OS (not an issue for me as the code is pretty tightly tied to Ubuntu)\nError and exception handling - this one I do get and think it's important, though catching an exception or exit code from subprocess is kinda easy too\n\nThe con in my eyes with native python is the need to involve somewhat complicated modules such as paramiko when bash's ssh and stat seem to me as more plain and easy to use\nAre there any guidelines for when and how to choose bash over python?\nThis question is mainly about using a command over ssh, but is relevant for any other command that bash is doing in a short and easy way and python wraps","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":105,"Q_Id":58426347,"Users Score":1,"Answer":"There are really three choices here: doing something in-process (like paramiko), running ssh directly (with subprocess), and running ssh with the shell (also with subprocess).  As a general rule, avoid running the shell programmatically (as opposed to, say, upon interactive user request).\nThe reason is that it\u2019s a human-oriented interface (thus the easy separation of words with spaces and shortcuts for $HOME and globbing) that is vastly underpowered as an API.  Consider, for example, how your code would detect that ssh was missing: the situation doesn\u2019t arise with paramiko (so long as it is installed), is obvious with subprocess, and is just an (ambiguous) exit code and stderr message from the shell.  Also consider how you supply the command to run: it already must be a command suitable for the shell (due to limitations in the SSH protocol), but if you invoke ssh with the shell it must be encoded (sometimes called \u201cdoubly escaped\u201d) so as to have the local shell\u2019s interpretation be the desired multi-word command for the remote shell.\nSo far, paramiko and subprocess are pretty much equivalent.  As a more difficult case, consider how a key verification failure would manifest: paramiko would describe the failure as data, whereas the others would attempt to interact with the user (which might or might not be present).  paramiko also supports opening multiple channels over one authenticated connection; ssh does so as well but only via a complicated ControlMaster configuration involving Unix socket files (which might not have any good place to exist in some deployments).  Speaking of configuration, you may need to pass -F to avoid complications from the user\u2019s .ssh\/config if it is not designed with this automated use case in mind.\nIn summary, libraries are designed for use cases like yours, and so it should be no surprise that they work better, especially for edge cases, than assembling your own interface from human-oriented commands (although it is very useful that such manual compositions are possible!).  If installing a non-standard dependency like paramiko is a burden, at least use subprocess directly; cutting out the second shell is already a great improvement.","Q_Score":1,"Tags":"python,python-3.x,bash,subprocess","A_Id":58442463,"CreationDate":"2019-10-17T06:41:00.000","Title":"File related operations python subprocess vs. native python","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to configure my vim editor in Ubuntu 18.04 to automatically run a python file inside the editor.   The problem seems to be that, on my Dell Inspiron, the function keypresses are being captured by the GUI.  For example, pressing F9 brings up a display of all my open windows. \nI've also tried setting a-F9 as well, but with no luck.  The command itself works manually, but vim won't run it when I press the key that's mapped to the command. \nHere's an example of the lines in the .vimrc that I've tried...\nautocmd filetype python nnoremap <buffer> <F9> :exec '!clear; python' shellescape(@%, 1)<cr>\nand...\nautocmd filetype python nnoremap <buffer> <a-F9> :exec '!clear; python' shellescape(@%, 1)<cr>\nI've also tried this:\nimap <F5> <Esc>:w<CR>:!clear;python %<CR>\nNone of them seem to work.  Pressing the key doesn't run the command. \nAny help appreciated. \nThanks","AnswerCount":1,"Available Count":1,"Score":0.3799489623,"is_accepted":false,"ViewCount":201,"Q_Id":58427032,"Users Score":2,"Answer":"You can insert the literal key inside a buffer (here: your .vimrc) by pressing <C-V> followed by the key (e.g. <F9>). If that function key correctly arrives in Vim, the literal <F9> string (4 characters) should be inserted. If that's not the case, you first need to remove the interference by the surrounding system. It may be some bloatware (less likely on Linux though) that captures the function keys (uninstall it then), but I've also seen notebooks being configured with special functions (also volume \/ brightness up \/ down) on the function keys, and the actual function key is only sent via a combination with a special Fn key; that usually can be toggled in the BIOS. You can test other applications (e.g. the browser should react to <F5> with reload and <F11> with full-screen) to see if this indeed is a global problem. As you're on Linux, you can also use the xev tools for this.\nYour key mappings in itself are fine. I would recommend putting any settings, mappings, and filetype-specific autocmds into ~\/.vim\/ftplugin\/{filetype}_whatever.vim (or {filetype}\/whatever.vim (for Python mappings, I'd choose python_mappings.vim); cp. :help ftplugin-name) instead of defining lots of :autocmd FileType {filetype}; it's cleaner and scales better; requires that you have :filetype plugin on, though. Settings that override stuff in default filetype plugins should go into ~\/.vim\/after\/ftplugin\/{filetype}.vim instead.\nFunction keys itself should also work in terminals, in combinations with modifier keys like Shift and Alt often not. Therefore, another approach (for maximum portability, e.g. when you're working through SSH) would be to skip the function keys altogether and go for <Leader> mappings.","Q_Score":0,"Tags":"python,vim","A_Id":58427935,"CreationDate":"2019-10-17T07:22:00.000","Title":"Trying to set up an autocmd in .vimrc to map a key to a command, but having problems","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have two separate AWS Virtual Machines set up within a region (different availability zones) both are connected via WebSocket (in Python) to a different load balancer (Cloudfront) of the same host server (also hosted with AWS) and receive frequent small WebSocket payloads - every 5ms.\nNB: I do not own the host server I am merely on the receiving end.\nBoth machines are receiving the same updates and I would like to measure on which machine the updates\/payloads\/packets are arriving first\nIn essence I would like to figure out which load balancer is \"closer\" to the host and so has the least latency overhead in transmitting the signal since my application is highly latency sensitive.\nI have tried using the system clock to get timestamps of the data arrival however it is not guaranteed that the two instances have their time synced to an appropriate accuracy.","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":38,"Q_Id":58431786,"Users Score":1,"Answer":"follow this.\n\n\nSend a request to the load balancer with the body of the request containing the timestamp when it was sent to the server. You can\n  easily do this using the DateTime api of your fav language.\nAfter that packet arrives to your backend server residing on your instance (can be a simple node server or a rails server), you can get\n  that request, and compare it to the current timestamp. \nYou can do this on both the servers and can easily compare which was faster.","Q_Score":0,"Tags":"python,amazon-web-services,networking,time,websocket","A_Id":58431962,"CreationDate":"2019-10-17T11:40:00.000","Title":"Determining which packet\/update arrived first between two machines","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I want VS Code to turn venv on run, but I can't find how to do that.\nI already tried to add to settings.json this line:\n\n\"terminal.integrated.shellArgs.windows\": [\"source${workspaceFolder}\\env\\Scripts\\activate\"]\n\nBut, it throws me an 127 error code. I found what 127 code means. It means, Not found. But how it can be not found, if I see my venv folder in my eyes right now?\nI think it's terminal fault. I'm using Win 10 with Git Bash terminal, that comes when you install Git to your machine.","AnswerCount":5,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":39164,"Q_Id":58433333,"Users Score":31,"Answer":"This is how I did it in 2021:\n\nEnter Ctrl+Shift+P in your vs code.\n\nLocate your Virtual Environment:\nPython: select interpreter > Enter interpreter path > Find\n\nOnce you locate your virtual env select your python version:\nyour-virtual-env > bin > python3.\n\nNow in your project you will see .vscode directory created open settings.json inside of it and add:\n\"python.terminal.activateEnvironment\": true\ndon't forget to add comma before to separate it with already present key value pair.\n\nNow restart the terminal.\n\n\nYou should see your virtual environment activated automatically.","Q_Score":21,"Tags":"python,visual-studio-code,virtualenv,vscode-settings","A_Id":65650691,"CreationDate":"2019-10-17T13:02:00.000","Title":"Auto activate virtual environment in Visual Studio Code","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I want VS Code to turn venv on run, but I can't find how to do that.\nI already tried to add to settings.json this line:\n\n\"terminal.integrated.shellArgs.windows\": [\"source${workspaceFolder}\\env\\Scripts\\activate\"]\n\nBut, it throws me an 127 error code. I found what 127 code means. It means, Not found. But how it can be not found, if I see my venv folder in my eyes right now?\nI think it's terminal fault. I'm using Win 10 with Git Bash terminal, that comes when you install Git to your machine.","AnswerCount":5,"Available Count":2,"Score":1.0,"is_accepted":false,"ViewCount":39164,"Q_Id":58433333,"Users Score":8,"Answer":"There is a new flag that one can use: \"python.terminal.activateEnvironment\": true","Q_Score":21,"Tags":"python,visual-studio-code,virtualenv,vscode-settings","A_Id":65504572,"CreationDate":"2019-10-17T13:02:00.000","Title":"Auto activate virtual environment in Visual Studio Code","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I recently created a new Anaconda (Windows) environment in order to move from tensorflow 1.2 to tensorflow 2.0. My base environment is 1.2, and I created tensorflow-20 in order to install the new version. I did the install from the anaconda command line within the (tensorflow-20) environment. But now everything is messed up.\nNow, in Anaconda Navigator, it still shows Tensorflow 1.2.1 as the installed version for base. But in the (base) environment from the Anaconda command line, it shows the version as 2.0.0. Furthermore, in Anaconda Navigator, tensorflow-20 shows no installed packages, including python even.\nI feel like I'm fundamentally misunderstanding something here. Can anyone provide some guidance?","AnswerCount":2,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":275,"Q_Id":58450968,"Users Score":1,"Answer":"How did you install tensorflow 2.0 in the new conda env?\n\nIF with pip, run 'where pip' see if you are using the pip installed\nin the base env. You can run 'conda create -n tensorflow-20 pip' to get a pip installed in the new env. Then activate tensorflow-20 and install tensorflow 2.0 with pip.\nIF with conda, run 'where conda' to check the same thing.","Q_Score":0,"Tags":"python,tensorflow,anaconda","A_Id":58451300,"CreationDate":"2019-10-18T12:28:00.000","Title":"Why does Anaconda Navigator (Windows) show a different version of Tensorflow than the command line?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"My aim is to force the docker build to fail if the Unittests have not all passed. I'm using the following line in my DockerFile:\nRUN python3 -m unittest discover test\nMy unit tests are in classes in the test directory. The tests are run, but a failed test does not result in a failed build. \nI know that a non-zero exit code is how to stop a build, but that does not seem to occur using this command.","AnswerCount":1,"Available Count":1,"Score":0.3799489623,"is_accepted":false,"ViewCount":1973,"Q_Id":58484542,"Users Score":2,"Answer":"Had the same problem : Fail the docker build if unittest fails in azure pipeline \nI put the below code in my build.yml file. \nerrors=$(docker logs careplan-tests-1 2>&1 | grep \"FAILED\" -c)\n        if [ $errors > 0 ]; then\n          echo -e \"unittest tests failed\"\n          docker rm apiunittest\n          exit 1\n        fi\nGives the output as \"##[error]Bash exited with code '1'.\" in docker build and fails the azure pipeline.","Q_Score":8,"Tags":"python,unit-testing,docker","A_Id":62270037,"CreationDate":"2019-10-21T10:38:00.000","Title":"Stop\/fail docker build if tests fail","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a binary file on my PC that contains data in big-endian. The file contains around 121 MB.\nThe problem is I would like to convert the data into little-endian with a python script. \nWhat is currently giving me headaches is the fact that I don't know how to convert an entire file. If I would have a short hex string I could simply use struct.pack to convert it into little-endian but if I see this correctly I can't give struct.pack a binary file as input.\nIs there an other function\/utility that I can use to do that or how should my approach look like?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":36,"Q_Id":58498747,"Users Score":0,"Answer":"We need a document or knowledge of the file's exact structure.\nSuppose that there is a 4 byte file. If this file has just a int, we need to flip that. But if it is a combination of 4 char, we should leave it as it be.\nAbove all, you should find the structure. Then we can talk about the translation. I think there is no translation tools to support general data, but you need to parse that binary file following the structure.","Q_Score":1,"Tags":"python,endianness,data-conversion","A_Id":58498956,"CreationDate":"2019-10-22T07:03:00.000","Title":"Converting the endianness type of an already existing binary file","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am new to Python. Need help with Azure databricks.\nScenario:\nCurrently I am working on a project which uses HDInsight cluster to submit spark jobs and they use Python script with classes and functions [ .py] which resides in the \/bin\/ folder in the edge node.\nWe propose to use Databricks instead of HDInsight cluster and the PoC requires minimum effort.\nDoubts:\n\nIn the HDInsight cluster all the python scripts are stored in \/bin\/ folder and conf files with .yml in \/conf\/ folder.\n\nCan we replicate the same structure in the databricks DBFS so that minimum changes in the code to replicate the location.\n2.I am new to Python, I have a bunch of scripts in the \/bin\/ folder. How can I upload or install those scripts in databricks.\nMy assumption is, I need to create a package and install on the cluster as a library. Correct me if I am wrong.\n\nHow do I run the Python scripts from Databricks.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":1230,"Q_Id":58533089,"Users Score":0,"Answer":"@Sathya Can you provide more information on what the different python scripts as well as the config files do?\nAs for the python scripts, depending on what their function is, you could create one or more python notebooks in Databricks and copy the contents into them. You can then run these notebooks as part of a job or reference them in other notebooks with %run \/path\/to\/notebook","Q_Score":1,"Tags":"python,azure,databricks","A_Id":58537277,"CreationDate":"2019-10-24T01:56:00.000","Title":"Azure Databricks with Python scripts","Data Science and Machine Learning":1,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have been deploying apps to Kubernetes for the last 2 years. And in my org, all our apps(especially stateless) are running in Kubernetes. I still have a fundamental question, just because very recently we found some issues with respect to our few python apps.\nInitially when we deployed, our python apps(Written in Flask and Django), we ran it using python app.py. It's known that, because of GIL, python really doesn't have support for system threads, and it will only serve one request at a time, but in case the one request is CPU heavy, it will not be able to process further requests. This is causing sometimes the health API to not work. We have observed that, at this moment, if there is a single request which is not IO and doing some operation, we will hold the CPU and cannot process another request in parallel. And since it's only doing fewer operations, we have observed there is no increase in the CPU utilization also. This has an impact on how HorizontalPodAutoscaler works, its unable to scale the pods.\nBecause of this, we started using uWSGI in our pods. So basically uWSGI can run multiple pods under the hood and handle multiple requests in parallel, and automatically spin new processes on demand. But here comes another problem, that we have seen, uwsgi is lacking speed in auto-scaling the process tocorrected serve the request and its causing HTTP 503 errors, Because of this we are unable to serve our few APIs in 100% availability. \nAt the same time our all other apps, written in nodejs, java and golang, is giving 100% availability.\nI am looking at what is the best way by which I can run a python app in 100%(99.99) availability in Kubernetes, with the following\n\n\nHaving health API and liveness API served by the app\nAn app running in Kubernetes\nIf possible without uwsgi(Single process per pod is the fundamental docker concept)\nIf with uwsgi, are there any specific config we can apply for k8s env","AnswerCount":2,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":2090,"Q_Id":58534959,"Users Score":2,"Answer":"We use Twisted's WSGI server with 30 threads and it's been solid for our Django application. Keeps to a single process per pod model which more closely matches Kubernetes' expectations, as you mentioned. Yes, the GIL means only one of those 30 threads can be running Python code at time, but as with most webapps, most of those threads are blocked on I\/O (usually waiting for a response from the database) the vast majority of the time. Then run multiple replicas on top of that both for redundancy and to give you true concurrency at whatever level you need (we usually use 4-8 depending on the site traffic, some big ones are up to 16).","Q_Score":5,"Tags":"python,django,flask,kubernetes,uwsgi","A_Id":58537824,"CreationDate":"2019-10-24T05:57:00.000","Title":"Production ready Python apps on Kubernetes","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"For App Engine Standard the explicitly state that they do not support Pipfiles and immediately block you from pushing your project if it contains a Pipfile. In searching the documentation, I don't see anything that mentions if Pipfile is supported or not for App Engine Flex.","AnswerCount":3,"Available Count":1,"Score":1.0,"is_accepted":false,"ViewCount":1118,"Q_Id":58546089,"Users Score":11,"Answer":"You can just include Pipfile and Pipfile.lock in the .gcloudignore file and run pip freeze > requirements.txt after any library changes.","Q_Score":5,"Tags":"python,google-app-engine,google-cloud-platform,pipenv,app-engine-flexible","A_Id":61110829,"CreationDate":"2019-10-24T17:06:00.000","Title":"Does Google App Engine Flex support Pipfile?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I was trying to install kivy_deps.glew(version).whl with \n\npip install absolute\/path\/to\/file\/kivy_deps.glew\n\nAnd I get this error:\n\nkivy_deps.glew(version).whl is not a supported wheel on this version\n\nI searched in the web and saw that some people said that the problem is because you shoud have python 2.7 and I have python 3.7. The version is of glew is cp27. So if this is the problem how to install python 2.7 and 3.7 in the same time and how to use both of them with pip.(i.e maybe you can use \n\npip2.7 install \n\nFor python 2.7 and\n\npip install\n\nFor python 3.7\nP.S: My PC doesn't have an internet connection that's why i'm installing it with a wheel file. I have installed all dependecies except glew and sdl2. If there is any unofficial file for these two files for python 3.7 please link them.\nI know this question has been asked before in stackoverflow but I didn't get any solution from it(it had only 1 anwser tho)\nUpdate: I uninstalled python 3.7 and installed python 2.7, but pip and python weren't commands in cmd because python 2.7 hadn't pip. So I reinstalled python 3.7","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":46,"Q_Id":58546918,"Users Score":0,"Answer":"I fixed it. Just changed in the name of the file cp27 to cp37","Q_Score":0,"Tags":"python,pip,kivy,fixed","A_Id":58569768,"CreationDate":"2019-10-24T18:04:00.000","Title":"Kivy_deps.glew.whl is not a supported wheel on this version","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":1,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm trying to execute a shell script on Windows 10. I've also turned \"Windows Subsystem for Linux\" feature on, because the script needs to run a package that asks me to do so during installation.\nMy path for my programs as:\nexport PATH=$PATH:\/Users\/Myname\/Desktop\/Myfolder\nThen I tried to run the shell script I have stored in a specific folder (and directly called the working directory) by:\npython \/Users\/Myname\/Desktop\/Myfolder\/Mysubfolder\/create_fa.py\nBut this gives me this error: \nC:\\Users\\Myname\\AppData\\Local\\Programs\\Python\\Python38-32\\python.exe: can't open file 'C:\/Program Files\/Git\/Users\/Myname\/Desktop\/Myfolder\/Mysubfolder\/create_fa.py': [Errno 2] No such file or directory\nI'm confused because I specified where my create_fa.py file was stored, but when I run the shell script, it seems like it's trying to look my create_fa.py file at a different directory from which I specified. Why is the script looking for a different directory?","AnswerCount":2,"Available Count":2,"Score":0.0996679946,"is_accepted":false,"ViewCount":3270,"Q_Id":58547407,"Users Score":1,"Answer":"I'm running a shell script (.sh), and when I run the script, it runs with \"Git for Windows\"\n\nThis is where the path \"corruption\" is coming from.\nThe Git Bash terminal creates a \"linux-esque\" directory hierarchy (sort of), with \/ (the \"root\" directory) set to C:\/Program Files\/Git. So, when you use the path \/Users\/Myname\/Desktop\/Myfolder\/Mysubfolder\/create_fa.py, Git Bash resolves that to C:\/Program Files\/Git\/Users\/Myname\/Desktop\/Myfolder\/Mysubfolder\/create_fa.py, as you've seen.\nFrom Git Bash, you can access your normal directories like this:\n\n~ = %USERPROFILE% (your user directory)\n\/c\/... = Directories under C:\\, so your desktop would be \/c\/Users\/username\/Desktop","Q_Score":1,"Tags":"python","A_Id":58548612,"CreationDate":"2019-10-24T18:40:00.000","Title":"bash python no such file or directory: why is my file path different from what I specified?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm trying to execute a shell script on Windows 10. I've also turned \"Windows Subsystem for Linux\" feature on, because the script needs to run a package that asks me to do so during installation.\nMy path for my programs as:\nexport PATH=$PATH:\/Users\/Myname\/Desktop\/Myfolder\nThen I tried to run the shell script I have stored in a specific folder (and directly called the working directory) by:\npython \/Users\/Myname\/Desktop\/Myfolder\/Mysubfolder\/create_fa.py\nBut this gives me this error: \nC:\\Users\\Myname\\AppData\\Local\\Programs\\Python\\Python38-32\\python.exe: can't open file 'C:\/Program Files\/Git\/Users\/Myname\/Desktop\/Myfolder\/Mysubfolder\/create_fa.py': [Errno 2] No such file or directory\nI'm confused because I specified where my create_fa.py file was stored, but when I run the shell script, it seems like it's trying to look my create_fa.py file at a different directory from which I specified. Why is the script looking for a different directory?","AnswerCount":2,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":3270,"Q_Id":58547407,"Users Score":1,"Answer":"The problem is python doesn't look at $PATH at all.  If you have script.py in multiple PATH folders, how do you expect python to differentiate which script.py to run?\nWhat python does is look into the current directory, i.e. C:\/Program Files\/Git\/  You'll need to step back out that folder for a relative path, or supply the absolute path.\ne.g. if your bash session is currently at \/Users\/Myname\/ then all you need to do is:\npython Desktop\/Myfolder\/Mysubfolder\/create_fa.py\nOr pass in your user folder as absolute path:\npython ~\/Desktop\/Myfolder\/Mysubfolder\/create_fa.py","Q_Score":1,"Tags":"python","A_Id":58548257,"CreationDate":"2019-10-24T18:40:00.000","Title":"bash python no such file or directory: why is my file path different from what I specified?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I updated my Mac OS from High Sierra to Catalina \nI asked this question before, someone suggested me this syntax: python3 -m pip install jupyter\nWhen I tried this syntax it worked for the 1st time. After then when I completed my work and saved my file and exited Jupyter Notebook from the terminal.\nWhen I tried to open Jupyter Notebook from my Mac Terminal the 2nd time by just writing % jupyter notebook onto the terminal, it gave me an error: zsh: command not found: jupyter\nTried all the different approaches online, but I am not able to fix this issue.\nCan anyone guide me on how I can fix this problem ?","AnswerCount":3,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":4374,"Q_Id":58551140,"Users Score":2,"Answer":"Try pip3 install jupyter and then you should be able to run jupyter notebook form the terminal. As far as what caused the issue its hard to say it could be a variety of issues especially with the OSX update. I'm guessing though that it stems from the initial install by python3 -m pip install jupyter. I always install using pip or pip3 as I said above which will install it globally","Q_Score":0,"Tags":"python,macos,jupyter-notebook,zsh","A_Id":58551913,"CreationDate":"2019-10-25T01:45:00.000","Title":"Trying to Open Jupyter Notebook from Terminal constantly getting error of zsh: command not found: jupyter: Python Version: 2.7.16","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I updated my Mac OS from High Sierra to Catalina \nI asked this question before, someone suggested me this syntax: python3 -m pip install jupyter\nWhen I tried this syntax it worked for the 1st time. After then when I completed my work and saved my file and exited Jupyter Notebook from the terminal.\nWhen I tried to open Jupyter Notebook from my Mac Terminal the 2nd time by just writing % jupyter notebook onto the terminal, it gave me an error: zsh: command not found: jupyter\nTried all the different approaches online, but I am not able to fix this issue.\nCan anyone guide me on how I can fix this problem ?","AnswerCount":3,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":4374,"Q_Id":58551140,"Users Score":0,"Answer":"Execute pip3 show jupyter. This will show you where pip has installed Jupyter. Afterwards, you can execute jupyter notebook from that directory.","Q_Score":0,"Tags":"python,macos,jupyter-notebook,zsh","A_Id":58551851,"CreationDate":"2019-10-25T01:45:00.000","Title":"Trying to Open Jupyter Notebook from Terminal constantly getting error of zsh: command not found: jupyter: Python Version: 2.7.16","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm trying to install web3 in my pipenv environment and it fails when trying to install cytoolz. I already tried installing python3.8-dev (as the environment requires 3.8) and libssl-dev is also already installed.\nFirst it says\n\nAn error occurred while installing cytoolz==0.10.0 ; implementation_name == 'cpython' --hash=sha256:ed9f6a07c2bac70d6c597df360d0666d11d2adc90141d54c5c2db08b380a4fac! Will try again.\n\nIt then proceeds to try to install it again and then outputs a log error message\nAny help would be greatly appreciated!","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":638,"Q_Id":58559688,"Users Score":0,"Answer":"The solution would be you installing Xcode Developer Tools. This is due to the fact that it will install C compiler which is a key dependency for cytoolz. That should sort out your issue once and for all. I do hope that this helps ;-)","Q_Score":0,"Tags":"python,web3,pipenv,python-3.8","A_Id":66726119,"CreationDate":"2019-10-25T13:40:00.000","Title":"Pipenv: \"An error occurred while installing cytoolz\" when trying to install web3 (python3.8-dev is installed)","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm using python 3.7 and os library. I have to run a battery of tests on both STAGE and TEST environments. Currently the code sets the environment to STAGE \n\nENVIRONMENT = os.getenv('ENV', 'STAGE')\n\nbut I want it to be set by passing an argument via command line. Anyone?","AnswerCount":3,"Available Count":1,"Score":1.0,"is_accepted":false,"ViewCount":14704,"Q_Id":58593249,"Users Score":10,"Answer":"In case of a command line of a UNIX shell you can set the env variable as part of your command:\n$ ENV=STAGE pytest .\/tests\/","Q_Score":7,"Tags":"python,operating-system,pytest","A_Id":58593432,"CreationDate":"2019-10-28T14:57:00.000","Title":"How do I pass an argument via command line to set an environ in Python","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Kernel doesn't work and in my terminal I get a syntax error.\nI'm using a Mac, I've used Anaconda before. Never had any problems. \nFile \"\/Users\/aydanaslanova\/random.py\", line 3\n    random_number = random.randint(1,10). \n                                         ^\nSyntaxError: invalid syntax\nThis is the error I am getting. No clue what I'm doing wrong. Did bunch of research still can't fix it.\nKernel should connect. Please help, I would greatly appreciate it.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":51,"Q_Id":58617653,"Users Score":0,"Answer":"renaming \/Users\/aydanaslanova\/random.py worked","Q_Score":0,"Tags":"python,pandas,anaconda,jupyter","A_Id":58617985,"CreationDate":"2019-10-30T01:42:00.000","Title":"Kernel won't connect in Anaconda on my Mac","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am using Python 3.7 on windows. I installed Pycharm and successfully wrote a script which I am now trying to schedule using Windows Task Scheduler, which comes with its on set of complications. One thing I have noticed about Pycharm is I think it has created a separate file directory to store any packages I add to a script (maybe in something called \"venv\"? Instead of using the User\/Python37\/Scripts file. \nThis means when I try to run my script in the command prompt, python.exe looks for packages and cannot find them. Also if I go into my Pycharm project folder is see another instance of a Python Application file different than the Python Application stored in User\/Python37. I think this also creates problems but I am not 100% sure.\nI am hoping someone has seen this issue and can help me align where Pycharm stores packages. Any help would be greatly appreciated.","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":46,"Q_Id":58628039,"Users Score":0,"Answer":"PyCharm creates a virtual environment (venv) where you can keep the python version and the libraries used in a specific project.\nYou can add libraries to the specific environment through the Pycharm GUI:\n\nFile > Settings > Project: Patterns > Project Interpreter > Install (green +)\n\nFind your package and click Install Package in your venv.\nYou can see all the installed packages and their version in the path:\n\nFile > Settings > Project: Patterns > Project Interpreter\n\nYou can also use pip install, if you want to go through CLI, but be sure to use the virtual environment's pip (located in project_folder\/venv\/Scripts).  \nIf for some reason you want to use the python version outside the virtual environment, go to the following path in PyCharm:\n\nFile > Settings > Project: Patterns > Project Interpreter\n\nIn the Project interpeter dropdown menu, you should find other python's location; choose the one you prefear. If you don't see your standard python version (usually in C:\\python\\python.exe, or something similar), you can add it by clicking on the settings menu, and specify the path to the desired python version in Base interpreter:.\nIn this window, you can find other settings to configure the interpreter as you want.","Q_Score":2,"Tags":"python,windows,pycharm","A_Id":58628519,"CreationDate":"2019-10-30T14:50:00.000","Title":"Pycharm storing packages in separate files?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a two tasks - a and b.\nTask a running in 5 minutes after finish previous task a.\nTask b running in 3 minutes after finish previous task b.\nHow can I implement it? I'm use python 3.6.8, Django 2.2.6 and celery 4.3.0?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":421,"Q_Id":58629790,"Users Score":0,"Answer":"The short answer is that you can't do this with celery beat because celery beat will trigger off of task start and not at task end.  If you absolutely need to do it three minutes after the previous task ends, you'd be advised to just adding a call to .apply_async at the end of both a and b and kicking off each task once.","Q_Score":1,"Tags":"python,django,python-3.x,task,celery","A_Id":58785338,"CreationDate":"2019-10-30T16:21:00.000","Title":"How can to run task in 5 minutes after finish previous task using celery-beat?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I have successfully installed a Python Function on a Linux VM, but due to some dependencies I need it to be deployed on Windows. It is set to be deployed on Linux, but is it possible to deploy it on Windows VM?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":381,"Q_Id":58650449,"Users Score":1,"Answer":"At this time no, Python Functions are only supported in App Service Plans using Linux.\n\nYour Azure Function App has 'FUNCTIONS_WORKER_RUNTIME' set to 'dotnet'\n  while your local project is set to 'python'. You can pass --force to\n  update your Azure app with 'python' as a 'FUNCTIONS_WORKER_RUNTIME'\nC:\\Users\\-----\\source\\repos\\func\\MyFunctionProj>func azure functionapp publish pyfunc1 --force\nSetting 'FUNCTIONS_WORKER_RUNTIME' to 'python' because --force was\n  passed Getting site publishing info... Publishing Python functions is\n  only supported for Linux FunctionApps","Q_Score":0,"Tags":"python,azure,function,azure-functions","A_Id":58652093,"CreationDate":"2019-10-31T20:01:00.000","Title":"Is it possible to deploy Python Azure Function on Windows OS Image","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have been able to freeze a Python\/PySide2 script with fbs on macOS, and the app seems to work.\nHowever, I got some errors from the freeze process stating: \n\nCan not find path .\/libshiboken2.abi3.5.13.dylib. \n\nDoes anyone know how to fix that?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":648,"Q_Id":58658902,"Users Score":0,"Answer":"Try to use the --runtime-tmpdir because while running the generated exe file it needs this file libshiboken2.abi3.5.13.dylib and unable hook that file. \nSolution: use --add-data & --runtime-tmpdir to pyinstaller command line.\npyinstaller -F --add-data \"path\/libshiboken2.abi3.5.13.dylib\":\"**PATH\"\n--runtime-tmpdir temp_dir_name your_program.py\nhere PATH  = the directory name of that file looking for.-F = one file","Q_Score":1,"Tags":"python,pyinstaller,pyside2,python-standalone,fbs","A_Id":58706807,"CreationDate":"2019-11-01T12:00:00.000","Title":"how to solve fbs error 'Can not find path .\/libshiboken2.abi3.5.13.dylib'?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I thought it might be time to start using PowerShell instead of cmd. I currently run Python scripts from Notepad++ with the following commnad:\ncmd \/c cd &quot;$(CURRENT_DIRECTORY)&quot; &amp;python -i &quot;$(FILE_NAME)&quot;\nHow should I modify this to get the same behaviour in PowerShell please?\nI tried\npowershell -noexit cd &quot;$(CURRENT_DIRECTORY)&quot; &amp;python -i &quot;$(FILE_NAME)&quot;\nbut I got an error about ampersands. I know very little about PowerShell or cmd in general - I just use them to run my Python scripts.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":58,"Q_Id":58678730,"Users Score":0,"Answer":"After a bit more digging I found a solution:\npowershell -noexit cd '$(CURRENT_DIRECTORY)'; python -i '$(FILE_NAME)'\nPowerShell seems to prefer single quotes for paths so I wrapped $(CURRENT_DIRECTORY) and $(FILE_NAME) in single quotes.\nAlso, & is replaced by ; for multiple commands.\nIf there is a more \"correct\" way of doing this, please let me know.","Q_Score":1,"Tags":"python,powershell,cmd","A_Id":58679344,"CreationDate":"2019-11-03T09:06:00.000","Title":"Calling PowerShell from Python using Notepad++","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have just started using PIPENV and I found it amazing as I have never used virtual environments before. However, I am still confused with the PIPENV file and the lock file. I understand through videos that both files are essential for PIPENV.\nI have two questions regarding the two files:\n1) If I wish to deploy it on my friends laptop (lets take him as the end user), which of those two files do I need to pass him and what are their purposes?\n2) If I wish to deploy it on my other friends laptop (lets take him as my project partner) who requires development libraries, which of those two files do I need to pass him and what are their purposes?\n3) What is the difference between 'freeze' and 'lock'?\nThanks in advance!","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":520,"Q_Id":58743814,"Users Score":2,"Answer":"Pipfile is the file describing which dependencies are directly needed by your application.\nPipfile.lock is generated from Pipfile and describes everything that needs to be installed for your application to work, i.e. your direct dependencies, their dependencies etc.\nAnswering your questions 1 and 2, you should ship both Pipfile and Pipfile.lock in both scenarios.\nHowever, the installation process will be slightly different.\nAn end user would need to install the dependencies with pipenv install --deploy to make sure that Pipfile.lock is fresh -- the installation will fail if the lockfile is out of date.\nAnother developer of your project might install the dependencies with plain pipenv install. If Pipfile.lock is out of date, it will be regenerated during installation.\n\nAnswering your question 3: freeze is a pip command, not a pipenv command.\npip freeze prints current contents of your virtual environment in a text format, and its output is typically saved in a file named requirements.txt. If your virtual environment is somehow out of date, its contents will still be output as-is.\npipenv lock builds and outputs the project's dependency list, whether or not they are currently installed. It generates the lockfile under the name Pipfile.lock for further usage with pipenv.","Q_Score":0,"Tags":"python,python-3.x,pip,pipenv","A_Id":58746721,"CreationDate":"2019-11-07T07:24:00.000","Title":"Pipenv & lock file - depolyment","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a Python program named read.py which reads data from serial communication every second, and  another python program called calculate.py which has to take the real time values from read.py.\nUsing subprocess.popen('read.py',shell=True) I am able to run read.py from calculate.py\nMay I know how to read or use the value from read.py in calculate.py?\nSince the value changes every second I am confused how to proceed like, saving value in registers or producer consumer type, etc.\nfor example : from import datetime \nwhen ever strftime %s is used, the second value is given \nhow to use the same technique to use variable from another script?","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":257,"Q_Id":58747649,"Users Score":1,"Answer":"I can suggest writing values to a .txt file for later reading","Q_Score":2,"Tags":"python,raspberry-pi,subprocess","A_Id":58748058,"CreationDate":"2019-11-07T11:18:00.000","Title":"Sharing variables between Python subprocesses","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm writing a Python program that runs under Mac OS and Linux, and I want to run some logic in a multiprocessing.Process. That logic will take a while, and I want it to continue running even after my program is finished and has exited. i.e., I want the main process to not wait for the auxiliary process to finish. I want the main process to exit as soon as it's finished.\nI made a few experiments, and it seems that this behavior is the default when using subprocess, but I can't make it happen using multiprocessing.Process, even when I run set_start_method('spawn').\nDo you know of a way to get multiprocessing.Process to behave this way?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":223,"Q_Id":58750861,"Users Score":0,"Answer":"Looks like starting a new process, and then calling os.fork from it does the trick.","Q_Score":6,"Tags":"python,multiprocessing","A_Id":58767313,"CreationDate":"2019-11-07T14:27:00.000","Title":"Python multiprocessing: Running a process after its parent exited","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"How do I redeploy an updated version of the Flask web app in Google App Engine.\nFor example, I have running web app and now there are new features added into it and needs redeployment. How can I do that?\nAlso how to remove the previous version.","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":111,"Q_Id":58754736,"Users Score":0,"Answer":"Add --no-promote if you want to deploy without routing service to the latest version deployed.","Q_Score":1,"Tags":"google-app-engine,google-cloud-platform,google-app-engine-python","A_Id":58758010,"CreationDate":"2019-11-07T18:11:00.000","Title":"Redeploying a Flask app in Google App Engine","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I'd like to find the window background color in HEX format. Looking for a solution that works on all platforms... Windows\/Linux\/Mac... \nThe following code print (self.cget('bg')) just prints SystemButtonFace but I'd like to get the actual HEX format. The reason is that I need to use this color as a base to create a new slightly darker color shade.","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":783,"Q_Id":58758439,"Users Score":1,"Answer":"The winfo_rgb method on all widgets will accept a color name and return the r, g, and b components as integers in the range of 0-65535 (16 bits). You can then convert those to hex using standard python string formatting.","Q_Score":0,"Tags":"python,tkinter","A_Id":58758652,"CreationDate":"2019-11-07T23:41:00.000","Title":"How can I get HEX or RGB color code of the window background color?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":1,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have installed libboost_python3 and am trying to link it to my program but get this error:\n\/usr\/bin\/ld: cannot find -lboost_python3\nCan anyone help me link to lboost_python3?\nThanks","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":965,"Q_Id":58771549,"Users Score":1,"Answer":"I could find a solution to this problem in ubuntu. Just add in terminal:\nsudo ln -s \/usr\/lib\/x86_64-linux-gnu\/libboost_python-py35.so \/usr\/lib\/libboost_python3.so","Q_Score":1,"Tags":"python-3.x,caffe,pycaffe","A_Id":58771606,"CreationDate":"2019-11-08T17:51:00.000","Title":"\/usr\/bin\/ld: cannot find -lboost_python3","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"please for a while now i've been trying to activate virtual environment for my windows 7 machine; I've run commands like env\\Scripts\\activate where env is the installed virtual environment folder in the project, but each time i run the command, it gives me an error like: activate is not recognized as an internal or external command, operable program or batch file. Please what could be the problem, what should i do?","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":108,"Q_Id":58778244,"Users Score":0,"Answer":"Do you have activate.bat inside Scripts folder? If yes, run that. If not, delete everything and run python -m venv env again and let me know what happens. Please note that you may change env to whatever you want.","Q_Score":0,"Tags":"python-3.x,flask,virtual-environment","A_Id":63473476,"CreationDate":"2019-11-09T10:06:00.000","Title":"Activating virtual environment environment","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm trying to install psycopg2 but \npip install psycopg2  brings to error: command 'gcc' failed with exit status 1\nCommand line tools are installed\nMacOS 10.15","AnswerCount":2,"Available Count":1,"Score":0.2913126125,"is_accepted":false,"ViewCount":1518,"Q_Id":58790217,"Users Score":3,"Answer":"This is likely because you don't have the PostgreSQL devel library installed. You have a few options:\n(1) Install the binary with pip install psycopg2-binary\n(2) Install PostgreSQL with HomeBrew: brew install postgresql, then pip install psycopg2.\nYou can probably just install the binary.","Q_Score":2,"Tags":"python,django,postgresql,terminal","A_Id":58793847,"CreationDate":"2019-11-10T15:42:00.000","Title":"Installing psycopg2 command 'gcc' failed with exit status 1","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I decided yesterday to do a clean install of Mac OS (as in, erase my entire disk and reinstall the OS).\nI am on a Macbook Air 2018. I did a clean install of Mac OS 10.15.1.\nI did this clean install due my previous Python environment being very messy.\nIt was my hope that I could get everything reigned in and installed properly.\nI've started reinstalling my old applications, and took care to make sure nothing was installed in a weird location.\nHowever, when I started setting up VS Code, I noticed that my options for Python interpreters showed 4 options. They are as follows:\n\nPython 2.7.16 64-bit, located in \/usr\/bin\/python\nPython 2.7.16 64-bit, located in \/System\/Library\/Frameworks\/Python.framework\/Versions\/2.7\/Resources\/Python.app\/Contents\/MacOS\/Python\nPython 3.7.3 64-bit, located in \/user\/bin\/python\nPython 3.7.3 64-bit, located in \/Library\/Developer\/CommandLineTools\/usr\/bin\/python3\n\nIn terminal, if I enter where python python3\nit returns \n\/usr\/bin\/python \/usr\/bin\/python3.\nHow in the world did python3 get there?\nMy only idea is that it now is included in the Xcode Developer Tools 11.2 package, as I did install that. I cannot find any documentation of this inclusion.\nAny ideas how this got here? More importantly, how do I remove it? I want to use Homebrew for all of my installation needs. Also, why does VS Code show 4 options?\nThanks!","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":3559,"Q_Id":58793820,"Users Score":3,"Answer":"The command line tool to run the python 2.7 environment is at \/usr\/bin\/python, but the framework and dependencies for it are in \/System. This includes the Python.app bundle, which is just a wrapper for scripts that need to run using the Mac's UI environment.\nAlthough these files are separate executables, it's likely that they point to the same environment.\nEvery MacOS has these.\nCatalina does indeed also include \/usr\/bin\/python3 by default. The first time you run it, the OS will want to download Xcode or the Command line tools to install the 'complete' python3. So these pair are also the same environment.\nI don't think you can easily remove these, due to the security restrictions on system files in Catalina.\nInterestingly, Big Sur still comes with python2 !","Q_Score":2,"Tags":"python,python-3.x,macos","A_Id":58800368,"CreationDate":"2019-11-10T23:16:00.000","Title":"Python 3.7.3 Inadvertently Installed on Mac OS 10.15.1 - Included in Xcode Developer Tools 11.2 Now?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am using pg_cron to schedule a task which should be repeated every 1 hour.\nI have installed and using this inside a docker environment inside the postgres container.\nAnd I am calling the query to create this job using python from a different container.\nI can see that job is created successfully but is not being executed due to lack of permission since the pg_hba.conf is not set to trust or due to no .pgpass file.\nBut if I enable any of those both, anyone can enter into database by using docker exec and do psql in the container.\nIs there anyway to avoid this security issue??? Since in production environment it should not be allowed for anyone to enter into the database without a password.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":134,"Q_Id":58796008,"Users Score":0,"Answer":"Either keep people from running docker exec on the container or use something else than pg_cron.\nI would feel nervous if random people were allowed to run docker exec on the container with my database or my job scheduler in it.","Q_Score":1,"Tags":"python,postgresql,docker,dockerfile","A_Id":58796832,"CreationDate":"2019-11-11T05:34:00.000","Title":"How do i solve the security problems caused by pg_cron?","Data Science and Machine Learning":0,"Database and SQL":1,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Having multiple languages to deploy under appengine; I wonder if some kind of private approach could be applied; in order to have it all resides only under a single domain\nFor example, given xyz.com domain setup as wildcard; having a default service, services svc1 and svc2; and a dispatch.yaml mapping *\/svc1\/* to svc1 service and *\/svc2* to svc2 service; how to :\n\nhide all the *.appspot domain ?\nhide the automatic setup of svc1.xyz.com and    svc2.xyz.com ?\n\nIt could be easy for a given service to check the host and redirect to the desired one; but it would have to be done for every services; feels like there a better way\nIt feels a bit messy to have all those auto enopoints opened and unused, the idea would be to have it all under xyz.com\/\n\n-","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":45,"Q_Id":58797322,"Users Score":1,"Answer":"There is no way of hiding all the routes of the .appspot domain. As you probably are aware the dispatch.yaml, only works as a redirect. Probably, you cannot just disable the default domain, since there are a lot of tools like Cloud Tasks, Cron Jobs etc.. that uses that default domain, hitting those endopoints.\nAs for the second question, you cannot hide them, but in case you don't need them, you can overwrite them in the dispatch.yaml to point to some custom made \"not found\" page.","Q_Score":0,"Tags":"google-app-engine,google-app-engine-python,google-appengine-node","A_Id":58798896,"CreationDate":"2019-11-11T07:44:00.000","Title":"Appengine \/ restrict services to only be available under a single domain","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I am using the googleapiclient in python to launch VM instances. As part of that I am using the facility to run start up scripts  to install docker and other python packages.\nNow, one thing I would like to do is copy files to this instance ideally during the instance creation stage through python code.\nWhat might be the way to achieve this? Ideally what would work is to be able to detect that the instance has booted and then be able to copy these files.","AnswerCount":2,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":1085,"Q_Id":58799925,"Users Score":2,"Answer":"If I am hearing you correctly, you want files to be present inside the container that is being executed by Docker in your Compute Engine VM.  Your Startup Script for the Compute Engine is installing docker.\nMy recommendation is not to try and copy those files into the container but instead, have them available on the local file system available to the Compute Engine.  Configure your docker startup to then mount the directory from the Compute Engine into the docker container.  Inside the docker container, you would now have accessibility to the desired files.\nAs for bringing the files into the Compute Engine environment in the first place, we have a number of options.  The core story however will be describing where the files start from in the first place.\nOne common approach is to keep the files that you want copied into the VM in a Google Cloud Storage (GCS) bucket\/folder.  From there, your startup script can use GCS API or the gsutil command to copy the files from the GCS bucket to the local file system.\nAnother thought, and again, this depends on the nature of the files ... is that you can create a GCP disk that simply \"contains\" the files.  When you now create a new Compute Engine instance, that instance could be defined to mount the disk which is shared read-only across all the VM instances.","Q_Score":0,"Tags":"google-cloud-platform,google-compute-engine,google-api-python-client","A_Id":58804004,"CreationDate":"2019-11-11T10:49:00.000","Title":"copy files during GCP instance creation from python","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am using the googleapiclient in python to launch VM instances. As part of that I am using the facility to run start up scripts  to install docker and other python packages.\nNow, one thing I would like to do is copy files to this instance ideally during the instance creation stage through python code.\nWhat might be the way to achieve this? Ideally what would work is to be able to detect that the instance has booted and then be able to copy these files.","AnswerCount":2,"Available Count":2,"Score":0.0996679946,"is_accepted":false,"ViewCount":1085,"Q_Id":58799925,"Users Score":1,"Answer":"First of all, I would suggest to use tool like Terraform or Google Deployment Manager to create cloud infrastructure instead of writing custom python code and handling all edge-cases by yourself.\nFor some reason, you can't use above tool and only Python program is an option for you the you can do following:\n1. Create a GCS bucket using python api and put appropriate bucket policy to protect data.\n2. Create a service account which has read permission to above GCS bucket.\n3. Launch VM instance using python API and have your start-up script to install packages and run docker container. Attach above service account which has permission to read files from above GCS bucket.\n3. Have a startup script in your docker container which can run ``gsutil` command to fetch files from GCS bucket and put at the right place.\nHope this helps. \nAgain, if you can use tools like Terraform, that will make things easy.","Q_Score":0,"Tags":"google-cloud-platform,google-compute-engine,google-api-python-client","A_Id":58804892,"CreationDate":"2019-11-11T10:49:00.000","Title":"copy files during GCP instance creation from python","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I would like to distribute my python application to the end-user as single-file executable. However, the end-user has the possibility to add functionalities to the application. For this he can write funtions to a python file which is then imported at runtime.\nHowever, if I freeze the Application for distribution, any changes made by the user to the python file afterwards will have no effect.\nHow can I distribute my Application as a more or less single-file executable to the end-user with him still being able to add\/remove functions?\nOr can you give the user the possibility to add functionality in another way than by importing his Python functions at runtime?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":115,"Q_Id":58801572,"Users Score":0,"Answer":"I think there is a misunderstanding of how a programme written in Python is actually executed. If we want to \"import Python code at runtime\" into a programme, this imported Python code would have to be compiled at runtime. If the end-user does not have a Python compiler installed, how should that be possible? Unless your programme effectively contains a Python compiler, I think, what you want to achieve is impossible by design.","Q_Score":0,"Tags":"python,windows,software-distribution","A_Id":58802044,"CreationDate":"2019-11-11T12:40:00.000","Title":"Is there a way to freeze python code only partially?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I currently have a pipeline running on GCP. The entire thing is written using pandas to manipulate CSVs and do some transformations, as well as side inputs from external sources. (It makes use of bigquery and storage APIs). The thing is, it runs on a 32vCPUs\/120GB RAM Compute Engine instance (VM) and it does simple parallel processing with python's multiprocessing library. We are currently thinking about switching to Dataflow, and what I'd like to know is: if I were to implement the same pipeline using Beam's DirectRunner, how should I expect the performance to compare to that of the current implementation? Would it be faster or slower and why? Will the DirectRunner use well all the machine resources or is it limited somehow?","AnswerCount":1,"Available Count":1,"Score":0.3799489623,"is_accepted":false,"ViewCount":564,"Q_Id":58809283,"Users Score":2,"Answer":"You question is broad. However, I will try to provide you some inputs. It's hard to compare a DirectRunner and a DataflowRunner. \n\nDirectRunner launches your pipeline on your current VM and use the capability of this only VM. It's your VM, you have to set it up, patch it, take care to free disk\/partition\/logs file, (...)   \nDataflowRunner launches the pipeline to a managed platform. Dataflow, according with its metrics and \"prediction\" (no ML here!) chooses to scale up or down the number of VM to execute as quickly as possible your pipeline. You can set small VM (1 vCPU for example) and Dataflow will spawn a lot of them, or bigger VM and, maybe that dataflow will spawn only 1 because it's enough for the pipeline.\n\nPro tips: the VM bandwidth is limited to 2Gbs per vCPU up to 8 vCPU. Take care of the network bottleneck and choose wisely the VM size (I recommend VM with 4 or 8 vCPU usually) \nOn one side, you have only one VM to manage, on the other side, you only have to set parameters and let Dataflow managing and scaling your pipeline.\nI don't know your growth perspective, but vertical scalability (adding more vCPU\/memory on your single VM) can reach a limit a day. With Dataflow, it's elastic and you don't worry about this; in addition of server management and patching.\nFinally, answer to your question \"faster or slower\", too hard to answer... Dataflow, if it run on several VM, will add network latency, dataflow internal management overhead, but can scale to use more vCPU in parallel at some point of time compare to your current VM. Is your pipeline can leverage of this parallelism or not? Is it solve some of your current bottleneck? Too hard to answer on my side.","Q_Score":1,"Tags":"python,google-cloud-platform,cloud,apache-beam,dataflow","A_Id":58812577,"CreationDate":"2019-11-11T22:02:00.000","Title":"Apache beam DirectRunner vs \"normal\" parallel processes","Data Science and Machine Learning":1,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I was making a subscription payment system from scratch in python in Django. I am using celery-beat for a scheduled task with RabbitMQ as a queue broker. django_celery_beat uses DatabaseScheduler which is causing problems.\n\nTakes a long time to dispatch simple-task to the broker. I was using it to expire users. For some expiration tasks, it took around 60 secs - 150secs. But normally it used to take 100ms to 500ms.\nAnother problem is that, while I re-schedule some task, while it is being written into the database it blocks the scheduler for some bizarre reason and multiple tasks are missed because of that.\n\nI have been looking into Apache Airflow because it is marketed as an industry-standard scheduling solution.\nBut I don't think, it is applicable and feasible for my small project.\nIf you have worked and played with a subscription payment system, can you advise me how to go forward with this?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":70,"Q_Id":58812247,"Users Score":0,"Answer":"I have a long winding solution that I implemented for a similar project.\n\nFirst I save the schedule as a model in the database\nNext I have a cron job that gets the entries that need to be run for that day\nThen schedule those jobs as normal Celery jobs by setting the ETA based on the time set in the schedule model.\n\nThis way Celery just runs off the messages from Redis in my case. Try it if don't get a direct answer.","Q_Score":0,"Tags":"python,django,scheduling,subscription,celerybeat","A_Id":58812430,"CreationDate":"2019-11-12T04:54:00.000","Title":"Is there a dynamic scheduling system for better implementation of a subscription based payment system?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I have added the C:\\Users\\Admin\\Anaconda3\\python.exe path to my system environment variables PATH but still when I run python command it opens Windows app store! Why bthis happens and how to fix it?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":67,"Q_Id":58833021,"Users Score":1,"Answer":"the PATH variable should contain \nC:\\Users\\Admin\\Anaconda3 \nnot \nC:\\Users\\Admin\\Anaconda3\\python.exe","Q_Score":0,"Tags":"python,path,windows-10,environment-variables","A_Id":58833343,"CreationDate":"2019-11-13T08:29:00.000","Title":"Why my Python command doesn't work in Windows 10 CMD?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"So I want to run a Python map reduce job on a Dataproc cluster, the problem is that I cannot find the Hadoop streaming jar file that needs to be submitted into the Main class or jar input.\nI'm using Dataproc image with Hadoop 2.7, an answer for Hadoop 2.8 would also work.\nThanks","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":275,"Q_Id":58833064,"Users Score":4,"Answer":"Hadoop Streaming jar located in \/usr\/lib\/hadoop-mapreduce\/ folder on Dataproc cluster nodes: \/usr\/lib\/hadoop-mapreduce\/hadoop-streaming.jar","Q_Score":2,"Tags":"python,hadoop,mapreduce,google-cloud-dataproc","A_Id":58841369,"CreationDate":"2019-11-13T08:31:00.000","Title":"Finding the Hadoop streaming jar in cluster in Dataproc","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Last thing I did was pip install boto3 and fastai through git bash yesterday. I can't imagine if anything else could have had any influence.\nI have been using python for a few months now, but today it stopped running. I opened my\nSublime Text - and after running some simple code I got:\n\"Python was not found but can be installed from the Microsoft Store\". \nGIT bash:\n\n$ python --version bash:\n  \/c\/Users\/...\/AppData\/Local\/Microsoft\/WindowsApps\/python: Permission\n  denied\n\nBut if I open up a file of python 3 in this link:\n\nC:\\Users...\\AppData\\Roaming\\Microsoft\\Windows\\Start\n  Menu\\Programs\\Python 3.7\n\nMy Python works.\nI think I have to redirect my main python file from the first link directory to the second and have no clue how to do this, that my Git and Sublime would be able to pick on this.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":109,"Q_Id":58837457,"Users Score":0,"Answer":"So, I gave up and just installed the recommended link from Microsoft store. So now I possibly have 4 pythons with 2 different versions in 3 locations, but hey.... it works :)\nRegarding a comment below my first questions:\nWhen I run $ ls -l which python in GITbash, it gives:\n-rwxr-xr-x 1 ... 197121 97296 Mar 25  2019 \/c\/Users\/...\/AppData\/Local\/Programs\/Python\/Python37-32\/python*\n\n\/...\/ is just my user name\n\nYesterday I tried that as well, the start was identical, although I can't really remember the link, if it was the same.","Q_Score":0,"Tags":"python,python-3.x,windows,hyperlink,permissions","A_Id":58856086,"CreationDate":"2019-11-13T12:45:00.000","Title":"Python does not work after installing fastai and boto3. Permission denied \/\/ Python was not found","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a Python script 'test.py' which has import pymysql. I have installed pymysql using pip and sudo. When I run this .py, it works great.\nI have another Bash script which is used to run the above test.py. When I run this bash script, I get the error:\n\nModuleNotFoundError: No module named 'pymysql'\n\nWhere am I going wrong?\nPyMySQL==0.9.3\nPython=3.7.1","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":47,"Q_Id":58847950,"Users Score":0,"Answer":"It is possible that pymysql's location needs to be in your PATH environment variable. \nWhen you run your bash script, what version of python is it using? Is it using the python \"on which\" you installed pymysql, or another one?\nTo make sure you are using the correct version of Python, I suggest using venv.","Q_Score":0,"Tags":"python,mysql,python-3.x","A_Id":58847980,"CreationDate":"2019-11-14T01:09:00.000","Title":"ModuleNotFound error while running through Bash","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm looking for the equivalent of the linux \"mmap.PROT_EXEC\" method for windows. (Inside mmap module on python)","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":221,"Q_Id":58849264,"Users Score":1,"Answer":"Without going down to raw ctypes access to the underlying APIs (CreateFileMapping\/MapViewOfFile), this can't be done. The access arguments (used on Windows, and mapped to equivalent flags\/prot flags on Linux) defined by Python are strictly limited to ACCESS_READ, ACCESS_WRITE, ACCESS_COPY and ACCESS_DEFAULT, and none of them allow the memory to be mapped executable.","Q_Score":0,"Tags":"python,windows,mmap","A_Id":58849362,"CreationDate":"2019-11-14T04:11:00.000","Title":"mmap.PROT_EXEC windows equivalent in mmap python","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I had Python 3.5 on Ubuntu 16.04 and then I installed Python 3.7 and made it the default Python.\nNow most of the programs I run go Python 3.7 but some run on 3.5 (I don't know why).\nAlso, the system says that there is a problem with python 3.5 but I can't figure what it is.\nCan anyone help?\nThank You","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":21,"Q_Id":58873569,"Users Score":0,"Answer":"Configure PYTHON_PATH pointing proper library path or set path environment variable pointing to correct Python version.","Q_Score":0,"Tags":"ubuntu-16.04,python-3.5,python-3.7","A_Id":58888916,"CreationDate":"2019-11-15T09:07:00.000","Title":"Having proplem with Python 3.5 after installing Python 3.7","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have been trying to make the Password Locker project in chapter 6 of the book, \"Automate the boring stuff with python\". The project requires one to use the command prompts to get the password of any account added to the dictionary in .py file. I have been trying to run it by using win + R button, but the Command window just appears and vanishes in a blink of an eye (literally), not allowing me to copy anything from the command window to notepad. I have followed all the necessary steps like creating the folder for storing the scripts and adding the folder path to environment variables. The code is simply copied from the book, I did not try to mess with it. I can't seem to pinpoint where the problem is and it is a bit problematic as all the projects in the further chapters use the .bat file with pause.exe. Help me and I will be your slave for life (not literally). Thanks in advance.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":54,"Q_Id":58882551,"Users Score":0,"Answer":"I solve this issue by creating a new folder on with the name Python34 on C:, also I copy the pw.py and the bat file.","Q_Score":1,"Tags":"python,python-3.x,passwords,pause","A_Id":62720376,"CreationDate":"2019-11-15T18:11:00.000","Title":"My bat file does not run pause.exe for the Password Locker project in chapter 6 of \"Automate the boring stuff with python\"","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to accomplish the following task using Airflow. I have an address and I want to run 3 different tasks taskA, taskB, taskC. Each task returns True if the address was detected. Store the times when each of the functions detected the address.\nI want to accomplish the below logic.\n\nRun all three tasks to start off with. \nIf any of them return True, store the current time.\nWait for 1 minute and rerun only the tasks that did not return True.\nIf all have returned True end the job. \n\nI am not sure how I can accomplish selectively running only those tasks that returned False from the last run. \nI have so far looked at the BranchPythonOperator but I still haven't been able to accomplish the desired result.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":39,"Q_Id":58906634,"Users Score":0,"Answer":"You can get last run status value from airflow db.","Q_Score":0,"Tags":"python,airflow","A_Id":58910634,"CreationDate":"2019-11-18T00:40:00.000","Title":"How to create a different workflow depending on result of last run?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"When I try to run a python command in Powershell, I get this error \nProgram 'python' failed to run: No application is associated with the specified file for this\nI have python installed in C:\\Users\\hp\\AppData\\Local\\Programs\\Python\\Python35 directory.\nI tried adding it with in the system environment variable path and restarted Powershell but get the same error. Also tried doing it via the commands given in other answers, but it doesn't work","AnswerCount":4,"Available Count":4,"Score":0.0,"is_accepted":false,"ViewCount":161,"Q_Id":58912217,"Users Score":0,"Answer":"Go to setting, Apps, App execution aliases, then turn off App installer option for both python.exe and python3.exe. After that your path to the installed python should work properly.","Q_Score":0,"Tags":"python,powershell","A_Id":70370384,"CreationDate":"2019-11-18T10:14:00.000","Title":"Python and Powershell issue even after adding it to path","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"When I try to run a python command in Powershell, I get this error \nProgram 'python' failed to run: No application is associated with the specified file for this\nI have python installed in C:\\Users\\hp\\AppData\\Local\\Programs\\Python\\Python35 directory.\nI tried adding it with in the system environment variable path and restarted Powershell but get the same error. Also tried doing it via the commands given in other answers, but it doesn't work","AnswerCount":4,"Available Count":4,"Score":0.0,"is_accepted":false,"ViewCount":161,"Q_Id":58912217,"Users Score":0,"Answer":"You might need to restart your computer for the new path to take effect, just restarting powershell will not work.","Q_Score":0,"Tags":"python,powershell","A_Id":58913060,"CreationDate":"2019-11-18T10:14:00.000","Title":"Python and Powershell issue even after adding it to path","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"When I try to run a python command in Powershell, I get this error \nProgram 'python' failed to run: No application is associated with the specified file for this\nI have python installed in C:\\Users\\hp\\AppData\\Local\\Programs\\Python\\Python35 directory.\nI tried adding it with in the system environment variable path and restarted Powershell but get the same error. Also tried doing it via the commands given in other answers, but it doesn't work","AnswerCount":4,"Available Count":4,"Score":0.0,"is_accepted":false,"ViewCount":161,"Q_Id":58912217,"Users Score":0,"Answer":"If this is for windows then you don't have to mention the path explicitly as just clicking \"Add to the path\" takes care of it.\nMost likely you didn't give the exact path ie C:\\Users\\hp\\AppData\\Local\\Programs\\Python\\Python35 while setting it during installation.\nDoes Python run when you give an exact path while executing the script? If nothing else works try restarting the system or reinstall Python and make sure the \"Add to path \" box is checked.","Q_Score":0,"Tags":"python,powershell","A_Id":58912580,"CreationDate":"2019-11-18T10:14:00.000","Title":"Python and Powershell issue even after adding it to path","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"When I try to run a python command in Powershell, I get this error \nProgram 'python' failed to run: No application is associated with the specified file for this\nI have python installed in C:\\Users\\hp\\AppData\\Local\\Programs\\Python\\Python35 directory.\nI tried adding it with in the system environment variable path and restarted Powershell but get the same error. Also tried doing it via the commands given in other answers, but it doesn't work","AnswerCount":4,"Available Count":4,"Score":0.049958375,"is_accepted":false,"ViewCount":161,"Q_Id":58912217,"Users Score":1,"Answer":"Make sure you can start python by typing\nC:\\Users\\hp\\AppData\\Local\\Programs\\Python\\Python35\\python.exe in powershell.\nMake sure the C:\\Users\\hp\\AppData\\Local\\Programs\\Python\\Python35 already added to PATH.\nRestart your system.","Q_Score":0,"Tags":"python,powershell","A_Id":58912415,"CreationDate":"2019-11-18T10:14:00.000","Title":"Python and Powershell issue even after adding it to path","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"My Airflow DAGs mainly consist of PythonOperators, and I would like to use my Python IDEs debug tools to develop python \"inside\" airflow. - I rely on Airflow's database connectors, which I think would be ugly to move \"out\" of airflow for development.\nI have been using Airflow for a bit, and have so far only achieved development and debugging via the CLI. Which is starting to get tiresome.\nDoes anyone know of a nice way to set up PyCharm, or another IDE, that enables me to use the IDE's debug toolset when running airflow test ..?","AnswerCount":4,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":7846,"Q_Id":58931845,"Users Score":2,"Answer":"It might be somewhat of a hack, but I found one way to set up PyCharm:\n\nUse which airflow to the local airflow environment - which in my case is just a pipenv\nAdd a new run configuration in PyCharm\nSet the python \"Script path\" to said airflow script\nSet Parameters to test a task: test dag_x task_y 2019-11-19\n\nThis have only been validated with the SequentialExecutor, which might be important.\nIt sucks that I have to change test parameters in the run configuration for every new debug\/development task, but so far this is pretty useful for setting breakpoints and stepping through code while \"inside\" the local airflow environment.","Q_Score":11,"Tags":"python,debugging,pycharm,ide,airflow","A_Id":58931846,"CreationDate":"2019-11-19T10:28:00.000","Title":"Debugging Airflow Tasks with IDE tools?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm using MAC OS Catalina Version 10.15.1 and I'm working on a python project. Every time I use the command \"import OS\" on the command line Version 2.10 (433), I get this message: zsh: command not found: import. I looked up and followed many of the solutions listed for this problem but none of them have worked. The command worked prior to upgrading my MAC OS. Any suggestion on how to fix it?","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":8587,"Q_Id":58954993,"Users Score":0,"Answer":"Don't capitalize it.\nimport os","Q_Score":1,"Tags":"python,command-line,import,operating-system","A_Id":58955079,"CreationDate":"2019-11-20T13:02:00.000","Title":"zsh: command not found: import","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm using MAC OS Catalina Version 10.15.1 and I'm working on a python project. Every time I use the command \"import OS\" on the command line Version 2.10 (433), I get this message: zsh: command not found: import. I looked up and followed many of the solutions listed for this problem but none of them have worked. The command worked prior to upgrading my MAC OS. Any suggestion on how to fix it?","AnswerCount":2,"Available Count":2,"Score":0.0996679946,"is_accepted":false,"ViewCount":8587,"Q_Id":58954993,"Users Score":1,"Answer":"The file is being interpreted as zsh, not a python. I suggest you to add this to the first line:\n#!\/usr\/bin\/env python","Q_Score":1,"Tags":"python,command-line,import,operating-system","A_Id":58955030,"CreationDate":"2019-11-20T13:02:00.000","Title":"zsh: command not found: import","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I want to start the conda Prompt from cmd, because I want to use the promt as a terminal in Atom.io.\nThere is no Conda.exe and the path to conda uses cmd to jump into the prompt. But how do I start it inside of cmd?","AnswerCount":2,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":88,"Q_Id":58958954,"Users Score":1,"Answer":"I guess what you want is to change to Anaconda shell using cmd, you can find the address for your Anaconda and run the following in your cmd:\n%windir%\\System32\\cmd.exe \"\/K\" \"Address\"\\anaconda3\nOr, you can find your Anaconda prompt shortcut, right click on that, and open its properties window. In the properties window, find Target. Then, copy the whole thing in Target and paste it into your cmd.","Q_Score":1,"Tags":"python,windows,cmd,anaconda","A_Id":58959055,"CreationDate":"2019-11-20T16:21:00.000","Title":"Starting conda pompt from cmd","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"So I\u2019ve got an xxx.so file that I created on my Ubuntu machine. Now I\u2019m in need of using that file on Windows machine in python. \nIs there any way to achieve it?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":167,"Q_Id":58959454,"Users Score":3,"Answer":".so files are shared objects, usually in the Executable and Linkable Format (ELF). Windows does not have a native loader for ELF; instead, it uses the Portable Executable format (PE). Also, your ELF .so is probably compiled for Linux, so it uses Linux system calls.\nIt is not possible to directly use a Linux binary on Windows. You might consider looking into Windows Subsystem for Linux, which emulates Linux on Windows, but it would probably be easier to recompile the extension module for Windows so that you get a .dll file in PE format instead.","Q_Score":0,"Tags":"python","A_Id":58959551,"CreationDate":"2019-11-20T16:47:00.000","Title":"Using functions from .so file on Windows in python","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am creating a docker image which is going to be based on buildpack-deps:stretch based image. I am told that it is preferred to install a Python version which was built from source instead of installing pre-built binaries.  \nQuestion: Why is it preferred for Python to be built from source?\n\nI read some articles talk about able to get latest patches etc., but\nthat does not make much sense to me since the pre-built binaries\nwould also have the patches after some testing is done. You ideally\ndo not want to take in source code which is not tested and build and\nuse it. Am I missing something in my argument?\nIf Python has pre-built binaries for debian:stretch, in my scenario why should I\nbe prefer to build from source instead of pre-built binaries?\n\nThanks in advance!","AnswerCount":2,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":55,"Q_Id":58964327,"Users Score":2,"Answer":"I am told that it is preferred to install a Python version which was built from source instead of installing pre-built binaries.\n\nWithout a qualification why, that was not a very meaningful suggestion. There are reasons to go either way, so I'll list those instead.\nReasons to use system packages:\n\nautomatic system updates will take care of emergency updates and security patching in a standard way - you can save a lot of time\nyou can be fairly confident that everything's compiled and distributed in a consistent way without breaking applications which rely on a given version (for example 3.5)\nnot managing your own compilation saves you time in both development and in build\/release process\nyou don't have to track upstream point-releases using a custom process\n\nReasons to compile yourself:\n\nif you want to rely on a specific patch not included upstream\nif you need to use new version, not released in your distro\n\nIn general, unless you can specifically say what you're going to gain by compiling from sources, understand you're committing to doing that on every future release, and hopefully define how you're going to automate it and who's going to do the work\/maintenance - I don't see a reason to do it.","Q_Score":0,"Tags":"python,linux","A_Id":58964531,"CreationDate":"2019-11-20T22:24:00.000","Title":"For Linux platform, why should I build Python from source instead of pre-built binaries?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm creating my own Docker container for use with SageMaker and I'm wondering why the serve command creates a Flask app to serve predictions on data when I want to do a batch transform job. Wouldn't it be simpler to just unpickle the model and run the model's predict method on the dataset I want predictions for? I don't need a web api\/endpoint. I just need to automatically generate predictions once a day.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":445,"Q_Id":58985124,"Users Score":1,"Answer":"Good question :) using the exact same code for batch inference and online inference reduces development overhead - the exact same stack can be used for both use-cases - and also reduces risks of having different results between something done in Batch and something done online. That being said, SageMaker is very flexible and what you describe can easily be done using the Training API. There is nothing in the Training API forcing you to use it for ML training, it is actually a very versatile docker orchestrator with advanced logging, metadata persistance, and built for fast and distributed data ingestion.","Q_Score":3,"Tags":"python,amazon-web-services,docker,machine-learning,amazon-sagemaker","A_Id":59002763,"CreationDate":"2019-11-21T23:11:00.000","Title":"Why does AWS SageMaker run a web server for batch transform?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I am trying to find a way that I can run commands to either open applications\/files from my local machine or import files from my local machine in Microsoft Azure Notebooks without uploading them directly to the Azure cloud. Does anyone know if this is possible or if who\/where is a better place to ask?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":188,"Q_Id":58988139,"Users Score":0,"Answer":"No, you cannot. The jupyter is run a micro-server, which is hosted on the Azure. You can only used the data on the Azure cloud. Been there, wished that, but no.","Q_Score":0,"Tags":"python,jupyter-notebook,azure-notebooks","A_Id":58988737,"CreationDate":"2019-11-22T05:38:00.000","Title":"Is there a way to directly import or open local files from Microsoft Azure Notebooks without uploading them to the Azure cloud?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am writing a framework in Python 3.8 on Debian that will launch some multiprocessing processes.  I want the configuration and launching of the processes to be done in functions OTHER than the main. The main file will be written by the end user of the framework and they should not need to know about these processes. Hence I tried to put the code that configures and launches the processes in helper functions or class methods that the main will call.\nWhat I'm finding is as soon as the launcher function \/ method exits the processes die. This is even though the launcher functions \/ methods run (I think) in the same process as main which is still running.  I have put a long time.sleep in the launcher functions \/ methods right before they exit and it seems the processes are alive for that long.\nI tried setting the 'daemon' flag but that doesn't seem to solve it.  If this is truly a limitation of multiprocessing I can instruct the users of my framework to always put some boiler-plate launcher code in their file, but it seems clunky.  All help is appreciated!","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":78,"Q_Id":58989313,"Users Score":0,"Answer":"The function that launches the processes was returning only the processes to main and NOT managed queues that the processes were using. I changed to return a dict with the processes AND the managed queues and everything works.  This is even though main does NOT use the queues.","Q_Score":0,"Tags":"python,linux,multiprocessing,debian","A_Id":58997964,"CreationDate":"2019-11-22T07:18:00.000","Title":"Can Python multiprocessing process be launched from OTHER than __main__?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a Django app running on Elastic Beanstalk in a Multicontainer Docker platform. So each EC2 instance has Docker containers for Django, Celery, RabbitMQ and Nginx.\nI have concerns regarding celery tasks when an EC2 instance is removed due to an auto-scale event or an immutable deployment.\n\nWill current tasks in the celery queue be lost when an instance is\nremoved?\nCan a running celery task be interrupted on an instance removal?\nCelery beat schedule (cron) would be called from every new instance\nlaunched, causing duplicated calls.\n\nI'm curious if anyone else has experience solving the above? Here's a list of some of the solutions I'm thinking about:\n\nChange the celery broker to a remote ElastiCache Redis instance. Not\nsure that would work tho.\nUse another library to replace Celery which can store the tasks in\nthe DB (e.g. huey or apscheduler).\nMigrate from celery to AWS SQS + Elastic Beanstalk Worker. That\nwould mean duplicating the same codebase to be deployed to both the\ncurrent web as well as a worker Elastic Beanstalk.\n\nAny other ideas or concerns?","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":731,"Q_Id":59065099,"Users Score":0,"Answer":"Do you need separate Celery\/Rabbit instance for every EC2 instance? Removing the rabbit instance will kill the celery unless you store it externally","Q_Score":1,"Tags":"python,django,amazon-web-services,celery,amazon-elastic-beanstalk","A_Id":59073048,"CreationDate":"2019-11-27T07:28:00.000","Title":"Are celery tasks and queues interrupted when elastic beanstalk EC2 instances are removed?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I have a long-running Python app which scans many megabytes of files in a loop every few minutes. Over the course of a day I see that it gobbles up gigybates of memory, and in the end I have to kill and re-start it. Of course I'm suspecting a C extension I have built myself.\nWhen I run the app under valgrind, though, it shows no leaks (except for some big number in \"possibly lost\", but the \"naked\" Python interpreter does that as well).\nI've downloaded and compiled a debugging-enabled version of Python-3.6.8 and installed it in a virtualenv but I can't for the life of me figure out how to run setup.py on my extension with debugging enabled, let alone how to install all the other packages I need to run the full application.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":40,"Q_Id":59069746,"Users Score":0,"Answer":"It turns out that over-referenced PyObjects end up in Valgrind's \"Possibly lost\" category, not \"definitely lost\". But even when running the Python interpreter alone there is a lot of stuff in \"possibly lost,\" so it took me a while to figure out where my code leaked memory (during the course of development a call to PyList_SetItem() had transmogrified into PyList_Append(), which doesn't steal the item's reference).","Q_Score":0,"Tags":"python-extensions","A_Id":59082591,"CreationDate":"2019-11-27T11:59:00.000","Title":"Python application leaking memory, but Valgrind says no","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm super new to coding (actually trying to teach myself some Python), but there's a thing bugging me that I cannot seem to find any info online about my particular case: When I run git on the terminal, there is:\n\nThe \"git\" command requires the command line developer\ntools. Would you like to install..\"\n\nNow, since I have a very basic Macbook 12, I try to keep it as lightweight and uncluttered as possible, so I don't want to install any IDE or anything, I'm practising coding with vim 7.3, but in order to install Vundle.vim to manage any plugins, I need git, is there a way I can install it without having to install Homebrew?\nThanks for any input! And sorry if I didn't express myself correctly. So basically to sum up:\n\u2013 I need git to install Vundle.vim, (or is there any other way?).\n\u2013 I run git on terminal and get an error that I need to install Xcode, which is like 7GB heavy.\n\u2013 I don't want to install Xcode or Homebrew.\nThanks!","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":31820,"Q_Id":59080773,"Users Score":0,"Answer":"I encountered the same issue when I was going to use Git on a new macOS. My solution is pretty simple, but just to install homebrew.\nThe trick is that homebrew install loads a git repo of full source history. To achieve this, it firstly installs XCode command line development tool to get Git.\nThen, after you have homebrew, you can benefit from XCode tools to issue git commands. Note that no need to install other parts of XCode here.\nI was also surprised to see what happened at homebrew install. There might be a reason from homebrew developers.","Q_Score":3,"Tags":"python,xcode,git,vim,terminal","A_Id":65271112,"CreationDate":"2019-11-28T02:02:00.000","Title":"The \"git\" command requires the command line developer tools. Would you like to install?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Can someone brief me on what happens if I didn't use any webserver(NGINX) in front of my Application server (uWSGI or GUNICORN)?\nMy requirement is exposing a simple python script as a web-service. I don't have any static content to render. In that scenario can I go without NGINX?\nBrief me what are the issues I will face if I go with plain app server? Max requests per second would be some 50 to 80(This is the upper limit).\nThanks, Vijay","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":66,"Q_Id":59085500,"Users Score":0,"Answer":"If your script acts like a webserver then it is a webserver and you don't need any layer on top of it.\nYou have to make sure though it acts like one:\n\nlistens for connections\nhandles them concurrently\nwakes up upon server restart, etc\u2026\n\nAlso:\n\nhandles internal connections correctly (eg. to the database)\ndoesn't leak memory\ndoesn't die upon an exception\n\nHaving a http server in front of a script has one great benefit: the script executes and simply dies. No problem with memory handling and so on\u2026 imagine your script becomes unresponsive, ask yourself what then\u2026","Q_Score":0,"Tags":"python-3.x,nginx,uwsgi","A_Id":59085973,"CreationDate":"2019-11-28T09:28:00.000","Title":"What happens if i didn't use NGINX with uWSGI or Gunicorn?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I've been trying to get SCons to work on the Windows 10 cmd for some time now. I installed it through pip, so I believe it is in the correct directory because python is working in cmd when I use py. When I try to use scons, I get the message \n\n'scons' is not recognized as an internal or external command,\n  operable program or batch file.\n\nBecause of that, I tried editing the user and system path variable to include scons under the directory 'C:\\Users\\dwayn\\AppData\\Local\\Programs\\Python38\\Lib\\site-packages\\scons\\', but I get the same error. \nWhat should I edit to make scons run on the command line?\nNote: I do have Anaconda 3 installed on my system if that effects anything.","AnswerCount":4,"Available Count":2,"Score":0.1488850336,"is_accepted":false,"ViewCount":3905,"Q_Id":59097128,"Users Score":3,"Answer":"I was stuck on this too - quick answer here because the documentation around this area is pretty awful:\n\nInstall python, including pip and tick 'add python to PATH'\nRun pip install scons in command line. This installs Scons, but it won't be available from command line yet\nIf you run pip show scons it'll show you where the Scons code actually is (for me it's c:\\users\\username\\appdata\\roaming\\python\\python38\\site-packages - but this is not what you want to add to your path\nThe Windows version of Scons runs through a wrapper .exe (historically this was a .bat file so there's posts everywhere saying to just 'find scons.bat'... which doesn't exist)\nThis wrapper program scons.exe is located in the Scripts folder of your python install - so with a generic install of Python 3.8 it would be here: C:\\Users\\username\\AppData\\Roaming\\Python\\Python38\\Scripts - here you should find the scons wrapper\n\nThis Scripts folder could be in a variety of places depending on how you installed python, and what version you have - If you can't find it there then also try places like C:\\Python27\\Scripts, C:\\Program Files (x86)\\Python38-32\\Scripts, etc\n\n\nAdd this folder to you PATH variable\nRestart cmd to pick this change up, and run where scons to check if it worked - this should return the filepath to scons.exe\n\nYou should now be able to run scons from command line","Q_Score":2,"Tags":"python,windows,cmd,windows-10,scons","A_Id":63925889,"CreationDate":"2019-11-28T23:25:00.000","Title":"How do I get SCons to work on the Windows 10 command line?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I've been trying to get SCons to work on the Windows 10 cmd for some time now. I installed it through pip, so I believe it is in the correct directory because python is working in cmd when I use py. When I try to use scons, I get the message \n\n'scons' is not recognized as an internal or external command,\n  operable program or batch file.\n\nBecause of that, I tried editing the user and system path variable to include scons under the directory 'C:\\Users\\dwayn\\AppData\\Local\\Programs\\Python38\\Lib\\site-packages\\scons\\', but I get the same error. \nWhat should I edit to make scons run on the command line?\nNote: I do have Anaconda 3 installed on my system if that effects anything.","AnswerCount":4,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":3905,"Q_Id":59097128,"Users Score":0,"Answer":"On my system, I have Python 3.8 installed in C:\\Python38. During the install using the exe installer, I checked the box to add Python to the system path. I then installed scons, which also goes into that location. Running scons didn't work at first (as it had with previous version installs) and I found that the paths that the Python installer added needed to be flipped. It needed to be C:\\Python38;C:\\Python38\\Scripts;%PATH%. The reason is because scons.bat is in C:\\Python38 and scons.py is in C:\\Python38\\Scripts. To run scons, it needs to find scons.bat first.\nMy suggestion is to make sure you have those two paths (wherever they are) in your system environment path such that the path to scons.bat comes first and make sure these come before any paths for other Python installs.","Q_Score":2,"Tags":"python,windows,cmd,windows-10,scons","A_Id":62600456,"CreationDate":"2019-11-28T23:25:00.000","Title":"How do I get SCons to work on the Windows 10 command line?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"My program executes a specific script, after which it creates a process via Popen method by executing a .bat (batch) file.\nThe .bat file, in turn, executes another .exe file. The problem for me arises when I am trying to simply run p.kill() to terminate the .exe file process .bat file has started. \nInstead of terminating all the processes, it just tries to kill the .bat file process, but not the .exe file's process that .bat file has created.\nIs there a way for me to specifically kill the .exe process?\nUPD: It seems like .bat file creates a separate .exe process which I cannot simply end with p.kill(), since it has different pid from the .bat's file process.\nI tried killing it with running os.system(\"taskkill \/F \/im process.exe\"), but it didn't touch the .exe process. Surprisingly, running the same taskkill command in the console did kill it.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":781,"Q_Id":59097889,"Users Score":1,"Answer":"I managed to solve the issue by running the subprocess.call(\"taskkill \/F \/im process.exe\").\nI am not sure why os.system didn't work in the first place, perhaps it's due to its outdated nature. Hopefully, it helps those who will encounter a similar issue!","Q_Score":2,"Tags":"python,batch-file,operating-system,popen,kill","A_Id":59117563,"CreationDate":"2019-11-29T01:52:00.000","Title":"Kill external process started by batch file on Windows from within Python script","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Everything was ok around a week ago.\nEven though I am running on a server, I really don't think much has changed. \nWonder what could have caused it.\nTensorflow has version 2.1.0-dev20191015\nAnyway, here is the GPU status:\nNVIDIA-SMI 430.50\nDriver Version: 430.50\nCUDA Version: 10.1 \nEpoch 1\/5\n2019-11-29 22:08:00.334979: I tensorflow\/stream_executor\/platform\/default\/dso_loader.cc:44] Successfully opened dynamic library libcublas.so.10.0\n2019-11-29 22:08:00.644569: I tensorflow\/stream_executor\/platform\/default\/dso_loader.cc:44] Successfully opened dynamic library libcudnn.so.7\n2019-11-29 22:08:00.647191: E tensorflow\/stream_executor\/cuda\/cuda_dnn.cc:329] Could not create cudnn handle: CUDNN_STATUS_NOT_INITIALIZED\n2019-11-29 22:08:00.647309: E tensorflow\/stream_executor\/cuda\/cuda_dnn.cc:337] Possibly insufficient driver version: 430.50.0\n2019-11-29 22:08:00.647347: W tensorflow\/core\/framework\/op_kernel.cc:1655] OP_REQUIRES failed at cudnn_rnn_ops.cc:1510 : Unknown: Fail to find the dnn implementation.\n2019-11-29 22:08:00.647393: W tensorflow\/core\/common_runtime\/base_collective_executor.cc:217] BaseCollectiveExecutor::StartAbort Unknown: Fail to find the dnn implementation.\nAt the end, I get:\nUnknownError:  [_Derived_]  Fail to find the dnn implementation.\n     [[{{node CudnnRNN}}]]\n     [[sequential\/bidirectional\/forward_lstm\/StatefulPartitionedCall]] [Op:__inference_distributed_function_18158]\nFunction call stack:\ndistributed_function -> distributed_function -> distributed_function\nThe code gets traced back to here:\n174         history = model.fit(training_input, training_output,  epochs=EPOCHES,\n    175                             batch_size=BATCH_SIZE,\n--> 176                             validation_split=0.1)\nThank you.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":389,"Q_Id":59112898,"Users Score":1,"Answer":"There was indeed a system-wide upgrade.\nUpdating cuda to cuda 10.2 and nvidia-driver to 440 and making libcudnn7 7.6.5 fixed the problem.","Q_Score":4,"Tags":"python,tensorflow","A_Id":59178620,"CreationDate":"2019-11-30T03:20:00.000","Title":"Encountering \"Could not create cudnn handle: CUDNN_STATUS_NOT_INITIALIZED\" on a previously working system","Data Science and Machine Learning":1,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Is there anyway to terminate a python program only when the user shutsdown the system?\nI want to include the condition in the while loop so that it keeps on looping till the system shutsdown.\nAlso is there a way to start the program automatically on booting the system?","AnswerCount":2,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":43,"Q_Id":59113296,"Users Score":2,"Answer":"Convert your python app to linux service is much better than white true only","Q_Score":0,"Tags":"python","A_Id":59113393,"CreationDate":"2019-11-30T04:57:00.000","Title":"Terminate a running python program only when the system shuts down","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Is there a way to make the Python program to run in background when the system boots?\n(on windows and linux systems)","AnswerCount":4,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":7556,"Q_Id":59113569,"Users Score":0,"Answer":"Yes, If your OS is linux then you can try supervisor. Otherwise you can just directly create a service in linux for your python file which you wants to run and then enable it for auto start when system boots up.","Q_Score":0,"Tags":"python,linux,windows","A_Id":59113614,"CreationDate":"2019-11-30T05:47:00.000","Title":"Automatically run a Python program when the system boots","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am developing proprietary software that would be distributed in a form of .exe file. In order to use it, users will have to authenticate with their whitelist credentials (username + password).\nThe issue I have encountered is that in the industry I am selling on, there are a lot of \"hackers\" who will try to decompile your executable file, get the source code and distribute it for free to other people.\nTo combat these reverse-engineering attempts, I have tried to both obfuscate my code and use various compilers, but so far to no success.\nWhat I have tried:\n\nUse py2exe compiler: \"hackers\" managed to decompile executable in an hour.\nUse pyinstaller compiler: same as with py2exe.\nUse pyminifier to obfuscate the code: \"hackers\" managed to deobfuscate the code.\nUse Oxyry Python Obfuscator: same as with pyminifier.\n\nThose who managed to decompile and deobfuscate my program explained that the open-source nature of the 4 tools mentioned above means that their algorithms are well-known and there are solutions out there made to reverse-engineer programs that use these open-source compilers and obfuscators.\nWhat I didn't try yet:\n\nUsing Pyarmor to obfuscate my code. I've heard it is good, but it costs 50$, so I want to be sure that it is the best obfuscation tool out there before purchasing the license.\nUsing Cython library to create a C-wrapper for my program, making it compiled in C instead of Python. Since C binaries are much harder to read, it will make the program significantly harder to decompile. However, I have never programmed in C, and I want to know if there are better ways to compile my source Python code, without the need to learn C.\n\nWhat I am not going to try:\n\nCompletely rewrite my whole program in a language other than Python. I am not strong in other languages, plus the program itself consists of over 1,000 lines of code, so I can't just completely rewrite it for the sole purpose of making it harder to decompile.\nMaking program open-source: This is a for-profit software, so I am not going to release the proprietary code, thank you for understanding.\nMaking the program a web-app: Since my program directly interacts with files on the user's PC, I can't make it web-based, it has to be on the user's PC.\n\nPlease also consider that if \"hacker\" will be able to disable the whitelist system without even accessing the source code, he will be able to distribute it to other users with no limitation. Therefore, I am looking for a way that will not only make it extremely hard to decompile the program, but also make it almost impossible to meddle with binaries and turn off certain parts of the program's code.","AnswerCount":2,"Available Count":2,"Score":0.1973753202,"is_accepted":false,"ViewCount":6032,"Q_Id":59117900,"Users Score":2,"Answer":"I guess I'll be the brave one to post as the answer: There is no technical means you can take to prevent software running on end user machines from being cracked.\nYou can perhaps make it more difficult, but since you've stated that in this market, people will always prefer cracked software to legit at any price, this is a situation you have essentially no hope of winning: if you have determined pirates, they will win every time.\nSo: You can't; give up\nSorry :-(","Q_Score":5,"Tags":"python,c,compilation,exe,obfuscation","A_Id":59118309,"CreationDate":"2019-11-30T16:05:00.000","Title":"Best way to protect source code of .exe program running on Python?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am developing proprietary software that would be distributed in a form of .exe file. In order to use it, users will have to authenticate with their whitelist credentials (username + password).\nThe issue I have encountered is that in the industry I am selling on, there are a lot of \"hackers\" who will try to decompile your executable file, get the source code and distribute it for free to other people.\nTo combat these reverse-engineering attempts, I have tried to both obfuscate my code and use various compilers, but so far to no success.\nWhat I have tried:\n\nUse py2exe compiler: \"hackers\" managed to decompile executable in an hour.\nUse pyinstaller compiler: same as with py2exe.\nUse pyminifier to obfuscate the code: \"hackers\" managed to deobfuscate the code.\nUse Oxyry Python Obfuscator: same as with pyminifier.\n\nThose who managed to decompile and deobfuscate my program explained that the open-source nature of the 4 tools mentioned above means that their algorithms are well-known and there are solutions out there made to reverse-engineer programs that use these open-source compilers and obfuscators.\nWhat I didn't try yet:\n\nUsing Pyarmor to obfuscate my code. I've heard it is good, but it costs 50$, so I want to be sure that it is the best obfuscation tool out there before purchasing the license.\nUsing Cython library to create a C-wrapper for my program, making it compiled in C instead of Python. Since C binaries are much harder to read, it will make the program significantly harder to decompile. However, I have never programmed in C, and I want to know if there are better ways to compile my source Python code, without the need to learn C.\n\nWhat I am not going to try:\n\nCompletely rewrite my whole program in a language other than Python. I am not strong in other languages, plus the program itself consists of over 1,000 lines of code, so I can't just completely rewrite it for the sole purpose of making it harder to decompile.\nMaking program open-source: This is a for-profit software, so I am not going to release the proprietary code, thank you for understanding.\nMaking the program a web-app: Since my program directly interacts with files on the user's PC, I can't make it web-based, it has to be on the user's PC.\n\nPlease also consider that if \"hacker\" will be able to disable the whitelist system without even accessing the source code, he will be able to distribute it to other users with no limitation. Therefore, I am looking for a way that will not only make it extremely hard to decompile the program, but also make it almost impossible to meddle with binaries and turn off certain parts of the program's code.","AnswerCount":2,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":6032,"Q_Id":59117900,"Users Score":14,"Answer":"Since people in this thread did not provide any satisfiable answers, I will explain what I did to secure my program. As I mentioned previously, my goal is not to create an \"uncrackable\" program, just one that is secure enough to deter away amateurs. \nI got help on one of the reverse-engineering forums, so props to those people!\nFirstly, I used Nuitka to convert .py file into a C-based standalone executable. Then, I passed a resulting .exe file through VMProtect to obfuscate the binaries.\nI've tested it on a few CS graduates, and they weren't able to crack or deobfuscate the program, so this is good enough for me.\nP.S. Those who said that \"it is impossible\" or \"your business model is wrong\", please do not share your opinions unless you have a reverse-engineering experience, thank you :)","Q_Score":5,"Tags":"python,c,compilation,exe,obfuscation","A_Id":60162002,"CreationDate":"2019-11-30T16:05:00.000","Title":"Best way to protect source code of .exe program running on Python?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I installed python and google cloud sdk. I'm trying to use:\ndev_appserver.py app.yaml\nWhen I go to my directory with my web app (using cd [directory]) and enter dev_appserver.py app.yaml into the command line nothing happens. The prompt shows the next line in CMD like I didn't enter anything... I indeed have an app.yaml file and this works perfectly on my MacBook running a local server.\nI also tried just typing \"dev_appserver.py\" and hitting enter and again nothing happens... It's as if I were to press enter in the command line without typing anything.\nOn MacBook when I type dev_appsever.py without pointing to an app.yaml file - it at least shows me all the potential commands associated with dev_appserver.py. Why doesn't the windows command prompt seem to understand this command? Nor tell me it doesn't understand it? Please help!!! I really want to run a local server for cloud engine on my Windows machine, but have no idea what's wrong. I google'd a bunch and haven't found someone else with this issue...","AnswerCount":2,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":234,"Q_Id":59121625,"Users Score":1,"Answer":"Finally solved my issue.... turns out goodle cloud sdk requires python 2.7. I uninstalled python 3.8, installed python 2.7. dev_appserver then didn't run unless I went into the folder where it exists: \nuser\/name\/local\/google\/cloudsdk\/bin\nAnd then I run python dev_appserver.py and it works.\nI also had to make sure my python command worked by adding it into my path. Python3.8 makes it easy to do via install wizard, but 2.7 requires you to go into your environment vars yourself to add it. This is why my python command originally did nothing.\nNot related - but my Blender 2.81 stopped working after this. I found out blender requires Python3. So I installed Python3.8 again and got both cloud sdk and blender working. Took way too many hours to solve this.... damn...","Q_Score":0,"Tags":"python","A_Id":59128906,"CreationDate":"2019-12-01T00:47:00.000","Title":"dev_appserver.py does nothing in CMD on windows","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"Ive been trying for a long time different commands but i always kept getting \n\nPlease SPecify --curl....\n\nI tried installing pycurl in a terminal, but it was not working","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":83,"Q_Id":59123007,"Users Score":0,"Answer":"What's the python version you are using? PycURL is only supported for specific versions.\nPython 2.7 or 3.4 through 3.6.\nOther Python versions won't be able to install PycURL via pip or easy_install , you'll have to manually compile it.","Q_Score":0,"Tags":"python,pycurl","A_Id":59512774,"CreationDate":"2019-12-01T06:13:00.000","Title":"pycurl installation issue on windows using pip and easy_install","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"im trying to install splunklib but when i used pip to install it i get this error message: \"  Could not find a version that satisfies the requirement splunklib (from versions: )\nNo matching distribution found for splunklib\"\nMy python version is 3.6.0 on a Win7\ndoes anyone know whats causing it and workaround to fix this error>","AnswerCount":3,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":723,"Q_Id":59132230,"Users Score":0,"Answer":"I am able to install with \"pip install splunklib\". Since you are getting error, please post more error information along wiht Screenshots","Q_Score":0,"Tags":"python-3.x","A_Id":59137543,"CreationDate":"2019-12-02T03:15:00.000","Title":"Im using PIP to install splunklib in python but it fails","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am writing a cgi script to run on a server, and when I put #!\/bin\/python3 at the top of the file it works fine. The problem is that on my local machine, my Python installation is in \/opt\/local\/bin\/python (and macOS does not allow symlinks in \/bin. So to run the script on my local machine, I need to manually change the path in each cgi file, which is cumbersome.\nIs there a better way to specify my Python path (something like \"try this path first else try this path?\")","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":38,"Q_Id":59162982,"Users Score":0,"Answer":"You can let your system environment choose the path using #!\/usr\/bin\/env python3","Q_Score":0,"Tags":"python,cgi","A_Id":59163022,"CreationDate":"2019-12-03T18:06:00.000","Title":"Specify Python location in cgi script","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Is there a way of using pip to install an application instead of packages?  I like how easy it is to update\/install\/remove python packages. But I'm wondering if it's the right tool for having users download a python app that runs out of $HOME\/bin (or \/usr\/bin\/) instead of installing it like a python library.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":196,"Q_Id":59168112,"Users Score":1,"Answer":"It really depends on what you mean by application. But if your goal is to run a script without specifying it's precise location, then that's possible. You can do that in at least two ways:\n\nAfter you install some app via pip, you can create links from your preferred bin directory to the entry point where the app is installed. For example link \/usr\/bin\/the_app to \/opt\/long\/path\/.venv\/bin\/the_app.\nInstall in a common location which you add to your shell's PATH. If you don't necessarily care for full separation between apps, this can be easily achieved by installing them via pip install --user the_app, which will use some local path like $HOME\/.local\/bin or $HOME\/Library\/Python\/3.7\/bin or something else. (depending on your system)\n\nWhich way to go depends on whether this is a shared system, or you're the only user and some other constraints. Neither is wrong, but one may be more convenient.\nFor safety, I'd recommend solution 1. It's nice to have isolation between apps so dependencies don't conflict.","Q_Score":0,"Tags":"python,pip","A_Id":59168197,"CreationDate":"2019-12-04T02:29:00.000","Title":"Using pip to install application instead of packages","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Fatal error in launcher: Unable to create process using '\"c:\\users\\owner\\appdata\\local\\programs\\python\\python37-32\\python.exe\"  \"C:\\Python37-32\\Scripts\\pip.exe\" install pygame'\nI have been trying to use pip installations in command prompt for the past while now and keep getting this issue. the first file location now no longer exists. Can anyone help me with this problem please ?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":6713,"Q_Id":59182083,"Users Score":0,"Answer":"Uninstall your current python and its launcher from control penal\nThen download new python version and install it\n\nWhile installing new one make sure you tick Add Launcher to all users(recommended) and ADD python to PATH both.\n\nNow click customized install and tick all the boxes and install it\n\nAfter install complete open powershell or cmd and type python to check it is\ninstalled properly if you see:\nPS C:\\Users\\Rohit> python\nPython 3.10.0 (tags\/v3.10.0:b494f59, Oct  4 2021, 19:00:18) [MSC v.1929 64 bit (AMD64)] on win32\nType \"help\", \"copyright\", \"credits\" or \"license\" for more information.\n\n\n\n\n\nexit()\n\n\n\ntype exit() for quit python\nThis that means successfully installed\n4.Now let's type pip + ENTER\nif you see multiple pip commands congratulations your good to go\n5.Okay then try to install your required python library\ne.g : pip install pyttsx\nPS C:\\Users\\Rohit> pip install pyttsx3\nDefaulting to user installation because normal site-packages is not writeable\nCollecting pyttsx3\nUsing cached pyttsx3-2.90-py3-none-any.whl (39 kB)\nCollecting pywin32\nUsing cached pywin32-302-cp310-cp310-win_amd64.whl (9.2 MB)\nCollecting pypiwin32\nUsing cached pypiwin32-223-py3-none-any.whl (1.7 kB)\nCollecting comtypes\nUsing cached comtypes-1.1.10.tar.gz (145 kB)\nUsing legacy 'setup.py install' for comtypes, since package 'wheel' is not installed.\nInstalling collected packages: pywin32, pypiwin32, comtypes, pyttsx3\nIf your see this kind of stuff, your problem is solved.\nNOTE : In case it not solved go to Microsoft store and install python and launch it. Then press windows button and search for edit environment variable >> environment variable. Check if python is added to the PATH if not then add it.","Q_Score":1,"Tags":"python,command-prompt","A_Id":69690953,"CreationDate":"2019-12-04T17:53:00.000","Title":"Fatal error in launcher: Unable to create process using pip.exe","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm having an hard time figuring out how to solve a problem with a little project.\nBasically i have a Django application. On the other hand i have an external Python script running. I would like to create a system where, each time a form in my Django app is submitted, the data submitted in the form is sent to the external Python application.\nThe external Python service should receive the data, read it, and according to who is the user and what did he submit, it should perform some tasks, then send a response.\nHere is what i thought: 1) Connect the external Python app to the same database that Django is using. So that when the form is submitted, it is saved on the database and the data can be 'shared' with the second Python service. The problem with this solution is that i would need the second app to query the Database every second and perform a lot of queries, that would be a problem with performances. 2) Create an epi endpoint, so that the external python app would connect to the endpoint and fetch the data saved in the database from there. The problem is the same of the first solution. Would a service like Redis or RabbitMQ help in this case?\nImporting the external Python process in my Django app is not a solution, it needs to be separate from the Django app. An important requirement for this, is speed. When new data is submitted, it needs to be received by the second Python app in the shortest time possible.\nThat said, i'm open to any advice or possible solution to solve this problem, thanks in advance :)","AnswerCount":2,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":862,"Q_Id":59202971,"Users Score":1,"Answer":"You should build an API. The 2nd app would now be an application server and the 1st app, when it receives a form submission from the user, would persist its data to the DB and then make an API call to the 2nd app via this API. You would include key information in the API request that identifies the record in the DB.\nYou can use Django (e.g. DRF) or Flask to implement a simple API server in Python.\nNow, this requires your app server to be up and running all the time. What if it's down? What should the 1st app do? If you need this level of flexibility, then you need to decouple these apps in some way. Either the 1st app implements some kind of backoff\/retry if it can't send to the 2nd app. Or you use a reliable queueing mechanism (something like Amazon SQS).","Q_Score":2,"Tags":"python,django","A_Id":59203064,"CreationDate":"2019-12-05T20:42:00.000","Title":"How can two Python applications hosted in different servers communicate?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"In Python 3.6, when I attempt to \"open('foobar', \"r+b\") with a file whose permissions are '-r--r--r--' (in CentOS7), I get a permission failure:\n\"builtins.PermissionError: [Errno 13] Permission denied: 'full\/path\/to\/foobar'\"\nIt opens just fine with \"r\", and the \"r+b\" works just fine if the permissions are '-rw-rw-rw-'.\nI do need to open these files read-only, I'd like them to have read-only protections in the directory (so that they aren't inadvertently changed by other code), and I do need to read them as binaries. Is this a feature\/bug of Python 3.6?\nI'd like to know if I'm doing something incorrect, or if there's some work-around if not. I'd really like to avoid upgrading to 3.8 right now.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":228,"Q_Id":59205618,"Users Score":2,"Answer":"You are using the + mode, which is trying to open the file for update. Try without the + and it should work.\nPer the help:\n\n'+'       open a disk file for updating (reading and writing)","Q_Score":1,"Tags":"python","A_Id":59205646,"CreationDate":"2019-12-06T01:31:00.000","Title":"Python 3.6 fails to open read-only file using \"r+b\" mode","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"There's a long list of languages that can be compiled into Wasm. Is there any performance gain from writing in something like C or Rust over Python? Or is it all the same since it is being compiled to Wasm?","AnswerCount":2,"Available Count":1,"Score":0.2913126125,"is_accepted":false,"ViewCount":2072,"Q_Id":59206185,"Users Score":3,"Answer":"Compiling to WebAssembly is basically just simulating a special form of assembly targeting virtual hardware. When you read \"can compile language X\" into Wasm, it doesn't always mean the language literally compiles directly to Wasm. In the case of Python, to my knowledge, it means \"they compiled Python interpreters to Wasm\" (e.g. CPython, PyPy), so the whole Python interpreter is Wasm, but it still interprets Python source code files normally, it doesn't convert them to special Wasm modules or anything. Which means all the overhead of the Python interpreter is there, on top of the overhead of the Wasm engine, etc.\nSo yes, C and Rust (which can target Wasm directly by swapping out the compiler backend) will still run faster than Python code targeting CPython compiled to Wasm, for the same reasons. Tools that speed up Python when run natively (e.g. Cython, raw CPython C extensions, etc.) may also work in Wasm to get the same speed ups, but it's not a free \"Compile slow interpreted language to Wasm and become fast compiled language\"; computers aren't that smart yet.","Q_Score":4,"Tags":"python,c,webassembly","A_Id":59206299,"CreationDate":"2019-12-06T02:53:00.000","Title":"Does WebAssembly run faster if written in C as opposed to Python?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I type print \u201chello world\u201d in my atom text editor then in my Mac OS X terminal I run cd \/users\/my user\/myfolder then i run the file I was writingpython example.py\nAfter that my Mac does nothing. No error message, no nothing it just goes to a new line","AnswerCount":4,"Available Count":3,"Score":0.0,"is_accepted":false,"ViewCount":2372,"Q_Id":59236800,"Users Score":0,"Answer":"I was having the same issue. It's the text editor Atom. You have to add LFCR as the last line of the code. I spent an hour trying to figure this out too.","Q_Score":0,"Tags":"macos,python-2.7,command-line,terminal,atom-editor","A_Id":65130694,"CreationDate":"2019-12-08T15:16:00.000","Title":"Python Script not Running in Mac Terminal","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I type print \u201chello world\u201d in my atom text editor then in my Mac OS X terminal I run cd \/users\/my user\/myfolder then i run the file I was writingpython example.py\nAfter that my Mac does nothing. No error message, no nothing it just goes to a new line","AnswerCount":4,"Available Count":3,"Score":0.0,"is_accepted":false,"ViewCount":2372,"Q_Id":59236800,"Users Score":0,"Answer":"I ran into this. The editor u used add only LF at the end of the line.\nTry to save it as Unix file or add LFCR for carrier return. It should solve the problem.\nOf course, run python first and see python is running correctly.","Q_Score":0,"Tags":"macos,python-2.7,command-line,terminal,atom-editor","A_Id":63652463,"CreationDate":"2019-12-08T15:16:00.000","Title":"Python Script not Running in Mac Terminal","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I type print \u201chello world\u201d in my atom text editor then in my Mac OS X terminal I run cd \/users\/my user\/myfolder then i run the file I was writingpython example.py\nAfter that my Mac does nothing. No error message, no nothing it just goes to a new line","AnswerCount":4,"Available Count":3,"Score":0.0,"is_accepted":false,"ViewCount":2372,"Q_Id":59236800,"Users Score":0,"Answer":"If there is no error message and no printing, you probably did not include a output command in your python file, such as print. \nRun this command in your terminal and it will work:\necho \"print \\\"hello world\\\"\" >> example.py \nthen python example.py","Q_Score":0,"Tags":"macos,python-2.7,command-line,terminal,atom-editor","A_Id":59261433,"CreationDate":"2019-12-08T15:16:00.000","Title":"Python Script not Running in Mac Terminal","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I found this note in Python multiprocessing Pool library docs:\n\nWorker processes within a Pool typically live for the complete\n  duration of the Pool\u2019s work queue. A frequent pattern found in other\n  systems (such as Apache, mod_wsgi, etc) to free resources held by\n  workers is to allow a worker within a pool to complete only a set\n  amount of work before being exiting, being cleaned up and a new\n  process spawned to replace the old one. The maxtasksperchild argument\n  to the Pool exposes this ability to the end user.\n\nIt says that Apache and others reinitialize multiprocess entities which makes it a good pattern. Is it about reinitializing objects (like \"OOP\" objects) to call garbage collector? Why is it important? GC can not be used while multiprocessing object exists?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":73,"Q_Id":59243118,"Users Score":1,"Answer":"One of the main use case is to avoid small leaks (memory, fd, ...) to affect long running services. \nAs software is not perfect, it's often the case that some library is not cleaning up properly. As these issues are out of the developer's control, an easy fix is to periodically terminate the leaking processes and start anew.\nAnother use case is to control the memory consumption of your service. Python memory fragmentation for example often leads workers to eat much more memory than needed.","Q_Score":1,"Tags":"python,garbage-collection,multiprocessing","A_Id":59245720,"CreationDate":"2019-12-09T05:43:00.000","Title":"Why reinitialize multiprocess workers?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I've compiled a program I've made with Python using cx_Freeze. I want to upload this program to a GitHub repository and I'm aware that I should use the \"releases\" feature. However, my executable file comes with many other files. Additionally, GitHub doesn't process some of the files(which came with my executable) I try to upload.\nIs there even a way to do such a thing? Or is this not supposed to be done? If so, how else can I distribute my executable programs?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":223,"Q_Id":59258391,"Users Score":2,"Answer":"You should upload your \"distributables\" as a ZIP file. You should also consider building an installer that copies all of the files to their correct location on the user's file system.","Q_Score":1,"Tags":"python,exe,cx-freeze","A_Id":59258426,"CreationDate":"2019-12-10T00:03:00.000","Title":"How do I properly upload a Python executable file to GitHub?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Seemingly out of the blue, I'm unable to access my datastore from my Google App Engine project.\nOne moment everything works, the next I'm getting \"StatusCode.PERMISSION_DENIED\" errors.\nI've properly installed the json key from a \"owner\" service account, set it up in my GOOGLE_APPLICATION_CREDENTIALS environment variable.\nI've even set up a new project, with the same results.\nSince yesterday, it just won't work.\nI raked the whole internet. Where shall I look?\nMost appreciated.","AnswerCount":1,"Available Count":1,"Score":0.3799489623,"is_accepted":false,"ViewCount":85,"Q_Id":59264091,"Users Score":2,"Answer":"I found it: I was importing a third-party library that was setting the GOOGLE_APPLICATION_CREDENTIALS environment variable to its own json file, overwriting access of the main project to the owner account.","Q_Score":0,"Tags":"python,google-app-engine,google-cloud-datastore,google-iam","A_Id":59264953,"CreationDate":"2019-12-10T09:32:00.000","Title":"Google Cloud Datastore: StatusCode.PERMISSION_DENIED with owner service account","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I've tried to google it up but haven't found the exact thing I need and I got stuck.\nI have written a Python3.7 script (that uses some external libraries) on Linux. This is just a single module + dependencies.\nI need to pack it, preferably to a single .exe file and send it to a Windows user. The file is to be used on Windows system. The user won't have Python installed nor can I expect them to do a lot of setup work.\nWhat would be the simplest way to pack the code (preferably with a cross-compiling, so that I don't need to use Windows) and minimize the amount of setup the Windows user will have to do?","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":762,"Q_Id":59271836,"Users Score":0,"Answer":"For example you have a file called index.py which is  a calculator program. Your question is how you can convert it to .exe file.\n\ngo to cmd and type command: pip install pyinstaller\nindex.py is in \"C:\\\" so type command:  cd \"C:\\\"\ncommand: pyinstaller index.py \n\nThere you can find a folder named dist. In that folder you can find a folder named index . So there is your programs .exe file.\nGood luck!","Q_Score":0,"Tags":"python-3.x,linux,windows,cross-platform","A_Id":59272192,"CreationDate":"2019-12-10T16:38:00.000","Title":"The simplest way to pack python3 script with dependencies into exe?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I've tried to google it up but haven't found the exact thing I need and I got stuck.\nI have written a Python3.7 script (that uses some external libraries) on Linux. This is just a single module + dependencies.\nI need to pack it, preferably to a single .exe file and send it to a Windows user. The file is to be used on Windows system. The user won't have Python installed nor can I expect them to do a lot of setup work.\nWhat would be the simplest way to pack the code (preferably with a cross-compiling, so that I don't need to use Windows) and minimize the amount of setup the Windows user will have to do?","AnswerCount":2,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":762,"Q_Id":59271836,"Users Score":3,"Answer":"Building on Artashes' answer, PyInstaller is in fact currently the best tool to compile Python scripts to exe.  \nBut it is not as simple, most of the time, as he says.\nShould you have external files used in your script, for example, there is more work to be provided to get a compilation to work. In the same manner, some third-party modules (such as PyQt5 or sounddevice) require a little more work.  \nI recommend you read the PyInstaller documentation carefully and make sure to read the part about specfiles. Any time I compile a script to an exe I first make a specfile using PyInstaller. I then fill out the specfile to add all problematic dependencies and external files.  \nAt this step you are rarely done. Most of the time one or more of your imports requires manual adding or modifying of the dist folder in order to make things work (for Qt you need to move the Qt5Core.dll to another folder for example).  \nIn other words the general steps are as follow:\n\nMake a specfile using PyInstaller  \nFill out the specfile  \nTry to compile.\nIf it works, create a script to automate the compilation. You are done.\n\nIf not:\n\nCheck to see what's not working (missing dll, files in the wrong place)  \nFix it in the automation script.\n\nHowever\nPyInstaller works on all platforms BUT it can only compile for the platform it is launched on. In other words using PyInstaller on Windows will create an exe and doing it on Linux will create a binary. Unfortunately there is only one workaround that I know of: Most people (me included) ressort to virtual machines to compile for specific platforms. If you are on linux, install Virtualbox, install a Windows OS and run PyInstaller from the VM to create an exe.","Q_Score":0,"Tags":"python-3.x,linux,windows,cross-platform","A_Id":59272768,"CreationDate":"2019-12-10T16:38:00.000","Title":"The simplest way to pack python3 script with dependencies into exe?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have downloaded Python 3.8 on my Ubuntu 16.04 and if i write python3.8 it shows it is present, but when I write python --version I am getting my old Python version which was 3.5","AnswerCount":3,"Available Count":1,"Score":0.0665680765,"is_accepted":false,"ViewCount":25784,"Q_Id":59272666,"Users Score":1,"Answer":"Everything depends on how you installed the python3.8.\nMany methods wouldn't update default symlinks for you.\nIf you do something like:\nsudo ln -s \/usr\/bin\/python3.8 \/usr\/local\/bin\/python and run python --version afterward it should solve your issue.\nIf you python3.8 binary is not in \/usr\/bin\/python3.8 update your symlink path accordingly.\nKeep in mind that some apps dependent on specific features of the lower python version might not work correctly. With Python3 the probability is low though.","Q_Score":10,"Tags":"python,python-3.x,ubuntu","A_Id":59272758,"CreationDate":"2019-12-10T17:34:00.000","Title":"Installed Python 3.8 on Ubuntu, but it's not the default","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have been trying to install Pandas on my Azure App Service (running Flask) for a long time now but nothing seems to work.\nI tried to use wheel, created a wheelhouse directory manually and tried to install the relevant Pandas .whl file (along with its dependent packages) but it still doesn't work. This approach gives me the following error - \n\"Could not find a version that satisfies the requirement\"\n\"No matching distribution found for ...\"\nA simple \"pip install pandas\" also doesn't work - when I do this, in my Kudu Bash client the command gets stuck on \"Cleaning up..\" and nothing gets installed.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":537,"Q_Id":59287420,"Users Score":0,"Answer":"I solved this by using the SSH terminal instead of the Kudu terminal. I find no reason why it was not working in the Kudu Remote Execution terminal, but using \"pip install pandas\" in Azure's SSH terminal solved it.","Q_Score":0,"Tags":"python,azure,azure-web-app-service","A_Id":59301763,"CreationDate":"2019-12-11T13:58:00.000","Title":"Azure Installing Pandas Module","Data Science and Machine Learning":1,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I am running venv based kernel and I am getting trouble in returning a proper answer from which python statement from my JupyterLab notebook. When running this command from terminal where I have my venv activated it works (it returns a proper venv path ~\/venvs\/my_venv\/bin\/python), but it does not work in the notebook.\n!which python\nreturns the host path:\n\/usr\/bin\/python\nI have already tried with os.system() and subprocess, but with no luck.\nDoes anyone know how to execute this command from the Jupyter notebook?","AnswerCount":2,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":763,"Q_Id":59289259,"Users Score":2,"Answer":"It sounds like you are starting the virtual environment inside the notebook, so that process's PATH doesn't reflect the modifications made by the venv. Instead, you want the path of the kernel that's actually running: that's sys.executable.","Q_Score":0,"Tags":"python,python-3.x,jupyter-notebook,jupyter-lab","A_Id":59289563,"CreationDate":"2019-12-11T15:38:00.000","Title":"JupyterLab - how to find out which python venv is my session running on?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am running venv based kernel and I am getting trouble in returning a proper answer from which python statement from my JupyterLab notebook. When running this command from terminal where I have my venv activated it works (it returns a proper venv path ~\/venvs\/my_venv\/bin\/python), but it does not work in the notebook.\n!which python\nreturns the host path:\n\/usr\/bin\/python\nI have already tried with os.system() and subprocess, but with no luck.\nDoes anyone know how to execute this command from the Jupyter notebook?","AnswerCount":2,"Available Count":2,"Score":-0.0996679946,"is_accepted":false,"ViewCount":763,"Q_Id":59289259,"Users Score":-1,"Answer":"maybe it's because you are trying to run the command outside venv\ntry source \/path\/to\/venv\/bin\/active first and then try which python","Q_Score":0,"Tags":"python,python-3.x,jupyter-notebook,jupyter-lab","A_Id":59290184,"CreationDate":"2019-12-11T15:38:00.000","Title":"JupyterLab - how to find out which python venv is my session running on?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Is it possible to write TCP SYN scan (half-open scanning) in python without using driver? I want to implement this kind of scanning in python without using scapy as I know it requires installing a driver.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":195,"Q_Id":59301532,"Users Score":0,"Answer":"If you're on Linux, BSD, OSX, yeah sure, using Raw sockets.\nI assume if you talk about a \"driver\" it means you're on Windows in which case you will be restricted (can't access layer 2), and will require administrative privileges anyways.\nIn any case, you can still use Scapy without any \"driver\" (libpcap-based) installed. Some functions will be disabled","Q_Score":0,"Tags":"python,scapy,nmap,port-scanning","A_Id":59310650,"CreationDate":"2019-12-12T09:35:00.000","Title":"Python-TCP SYN scan without using driver","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I want to listen to an existing SQS queue through Celery.\nI have already done publishing to Queue via celery and then consuming from that queue through workers and tasks bound to that queue.\nHowever, I am unable to figure out how to consume from an SQS queue if the publisher is a non-celery Django application. There is no such information available on the internet regarding this or at least I am unable to locate it. Can someone please guide me to some documentation for doing this?","AnswerCount":2,"Available Count":2,"Score":0.0996679946,"is_accepted":false,"ViewCount":410,"Q_Id":59306628,"Users Score":1,"Answer":"If I understood correctly what you want to do I have bad news for you - it is not possible. Celery can only consume own messages. If your Django application needs to send some task to the Celery cluster using SQS as broker, it needs to instantiate a Celery application object, and use it to send tasks.","Q_Score":1,"Tags":"python,django,celery,amazon-sqs","A_Id":59307003,"CreationDate":"2019-12-12T14:21:00.000","Title":"How to listen to already existing SQS queue with Celery and Django?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I want to listen to an existing SQS queue through Celery.\nI have already done publishing to Queue via celery and then consuming from that queue through workers and tasks bound to that queue.\nHowever, I am unable to figure out how to consume from an SQS queue if the publisher is a non-celery Django application. There is no such information available on the internet regarding this or at least I am unable to locate it. Can someone please guide me to some documentation for doing this?","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":410,"Q_Id":59306628,"Users Score":0,"Answer":"I would not use Celery. I would use boto3 directly, in a custom Django management command, to long-poll the queue and parse \/ route the incoming messages.\nCelery would give you nothing, and would only increase the complexity of implementation.","Q_Score":1,"Tags":"python,django,celery,amazon-sqs","A_Id":72195151,"CreationDate":"2019-12-12T14:21:00.000","Title":"How to listen to already existing SQS queue with Celery and Django?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"Is there any way to implement color highlights for the logs in Airflow UI (stdout logs)?\nI want to mark some logs, for example Exceptions messages in red and Success messages in green.\nThanks","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":473,"Q_Id":59307210,"Users Score":2,"Answer":"There is no way to do this with the standard config available in Airflow. You'd have to contribute your own code to do this.","Q_Score":1,"Tags":"python,airflow","A_Id":59320137,"CreationDate":"2019-12-12T14:51:00.000","Title":"Airflow - colored logging","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm using Ubuntu 19.10, in which there is python of version 3.7. After the release of python 3.8, which I have installed, now I want to uninstall python 3.7 so that whenever I would call python3 in my terminal, it would always call python3.8?","AnswerCount":3,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":30234,"Q_Id":59337891,"Users Score":5,"Answer":"I suggest you do not touch your default OS python instalation. Other parts of the system may depend on it and there is no way to know if an upgrade can break something, even if it should not.\nI also suggest that you learn (if you haven't already, but I suppose you did not because of the question) about using a python virtual environment, like virtualenv. This allows you to setup specific python environments for each project you write. This means each environment can have its own python version, and, besides the standard python lib for that version, any other third-party python lib you would like to install with pip for that project. This isolates projects from each other. You won't break one because of an upgrade of another.\nThat said, if you want to keep cutting edge with Python versions, make an install from source, and then install it in the system with the altinstall parameter (see the README.rst of the Python distribution. This way all the installed versions are available with different names (the same for pip) and then you create each of your virtual environments with the wanted version. There is a parameter for virtualenv to apply a specific (older) version if you want. \nQuoting the README on the \"Installing multiple versions\" section:\n\nOn Unix and Mac systems if you intend to install multiple versions of Python\n  using the same installation prefix (--prefix argument to the configure\n  script) you must take care that your primary python executable is not\n  overwritten by the installation of a different version.  All files and\n  directories installed using make altinstall contain the major and minor\n  version and can thus live side-by-side.  make install also creates\n  ${prefix}\/bin\/python3 which refers to ${prefix}\/bin\/pythonX.Y.  If you\n  intend to install multiple versions using the same prefix you must decide which\n  version (if any) is your \"primary\" version.  Install that version using make\n  install.  Install all other versions using make altinstall.\n  For example, if you want to install Python 2.7, 3.6, and 3.8 with 3.8 being the\n  primary version, you would execute make install in your 3.8 build directory\n  and make altinstall in the others.\n\nFinally, the other answers are ok to do exactly what you asked, if you still want to.","Q_Score":3,"Tags":"python,python-3.x","A_Id":59346882,"CreationDate":"2019-12-14T18:18:00.000","Title":"How to uninstall python 3.7 from Ubuntu 19.10?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I followed the official guide on using the google cloud sdk with python 3, and I was able to install the latest sdk (273.0.0) with the google app engine and python components. Now I'd like to use the launcher instead of the cli commands in the guide to run my project but I cannot find it anywhere. \nThe README file in my current installation of the app engine in my AppData\/local folder says that the App Engine Launcher should have a desktop shortcut and an executable at C:\\Program Files\\Google\\google_appengine\\launcher\\GoogleAppEngineLauncher.exe but neither shortcut nor executable path exist. I also looked through the AppData folder and didn't find it. \nWas the launcher never present\/removed from the app engine version I installed? Was it in the README by mistake? Or could the installation be incomplete?","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":124,"Q_Id":59352865,"Users Score":0,"Answer":"Yes, many years ago, to deploy GAE, Google provided an installable desktop app called GoogleAeppEngineLauncher.  I'm quite certain that it is no longer available and would not even function if you were somehow able to obtain a copy.\nYou now must use the gcloud commands to deploy your app.","Q_Score":1,"Tags":"python-3.x,google-app-engine,google-cloud-sdk","A_Id":59358062,"CreationDate":"2019-12-16T08:29:00.000","Title":"Is the App Engine Launcher still part of the GCloud SDK's App Engine?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have installed python version 2 and 3 in windows 10 through anaconda package. Using python --version, CMD shows the version of python as 3, but Windows bash shell shows it as 2.\nHow can I activate python version 3 in Windows bash shell?\nI need to activate it because I want to run commands in shell, for instance pyinstaller. CMD does not recognize pyinstaller.","AnswerCount":1,"Available Count":1,"Score":0.537049567,"is_accepted":false,"ViewCount":741,"Q_Id":59365372,"Users Score":3,"Answer":"bash in Windows runs on the Windows Subsystem for Linux, which has a version of Ubuntu running on it. It has its own filesystem and its own libraries and binaries for Python, so it is not using the versions of Python you installed in Windows.  You can see this by typing which python in bash.  It will return \/usr\/bin\/python which is a location in the Subsystem for Linux filesystem, not in the normal Windows filesystem.\nIn bash (as in Ubuntu) you launch Python 2 with the command python and you launch Python 3 with the command python3.\nIf Python 3 is not present in your bash install, you can add it from the package repositories by running the command sudo apt install python3 in bash.","Q_Score":0,"Tags":"python,windows","A_Id":59365465,"CreationDate":"2019-12-16T22:53:00.000","Title":"Windows bash shell shows the wrong version of Python","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm trying to run a file (an executable) in google colab  I mounted the drive and everything is ok however whenever i try to run it using :\n!  'gdrive\/My Drive\/path\/myfile' \nI get this output of the cell:\n\/bin\/bash: 'gdrive\/My Drive\/path\/myfile : Permission denied\nany ideas how to overcome the permissions?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":9920,"Q_Id":59365405,"Users Score":9,"Answer":"you first need to permit that file\/folder as:\n    chmod 755 file_name","Q_Score":6,"Tags":"python,bash,permissions,file-permissions,google-colaboratory","A_Id":59704683,"CreationDate":"2019-12-16T22:57:00.000","Title":"google colab \/bin\/bash: 'gdrive\/My Drive\/path\/myfile : Permission denied","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Presently, we send entire files to the Cloud (Google Cloud Storage) to be imported into BigQuery and do a simple drop\/replace. However, as the file sizes have grown, our network team doesn't particularly like the bandwidth we are taking while other ETLs are also trying to run. As a result, we are looking into sending up changed\/deleted rows only. \nTrying to find the path\/help docs on how to do this. Scope - I will start with a simple example. We have a large table with 300 million records. Rather than sending 300 million records every night, send over X million that have changed\/deleted. I then need to incorporate the change\/deleted records into the BigQuery tables. \nWe presently use Node JS to move from Storage to BigQuery and Python via Composer to schedule native table updates in BigQuery.\nHope to get pointed in the right direction for how to start down this path.","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":284,"Q_Id":59381483,"Users Score":1,"Answer":"Stream the full row on every update to BigQuery.\nLet the table accommodate multiple rows for the same primary entity.\nWrite a view eg table_last that picks the most recent row. \nThis way you have all your queries near-realtime on real data. \nYou can deduplicate occasionally the table by running a query that rewrites self table with latest row only. \nAnother approach is if you have 1 final table, and 1 table which you stream into, and have a MERGE statement that runs scheduled every X minutes to write the updates from streamed table to final table.","Q_Score":0,"Tags":"python,node.js,google-bigquery","A_Id":59382310,"CreationDate":"2019-12-17T20:15:00.000","Title":"BigQuery - Update Tables With Changed\/Deleted Records","Data Science and Machine Learning":0,"Database and SQL":1,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have no idea what I messed up, but it seems like a lot.\nThe problem:\n(I am using Windows 10, and only using the \"normal\" black terminal you get when you type \"CMD\" into the search.)\nI have installed Python 3.8, and subsequently deleted all older versions (2.6,2.7,3.7) of Python, since I figured I don't need them anymore. Now Python will only work if I type 'py' into the terminal window, 'python' can not find an appropriate command. (Along the way I messed up pip, but this is a different story.)\nIs this the \"normal\" command for Python 3? Did I rename my commands some time in the past? How do I use 'python' again? or should I not?\nWhen I install Python it never asks me how I want to name the command, so I figure installing it one more time will not help.\n(Sorry for maybe dumb questions, but this problem seems like one I can solve, before moving on to fixing pip.)","AnswerCount":2,"Available Count":2,"Score":0.0996679946,"is_accepted":false,"ViewCount":97,"Q_Id":59393856,"Users Score":1,"Answer":"Try to check your symbolic links:\ndir \/AL \/S C:\\\n\n\/A displays all files with a specific attribute, and L specifies reparse points (symlinks and directory junctions)\n\/S makes the command recursive\n\nReplace C:\\ with the drive letter you want to scan, or with a path if you don't want to scan an entire drive.\nTo delete a symbolic link, you may treat it like any other directory or file. \n\nIf you created a symbolic link to a directory, use the rmdir command.\nIf you created a symbolic link to a file, use the del command.","Q_Score":1,"Tags":"python-3.x,windows,terminal","A_Id":59394110,"CreationDate":"2019-12-18T14:10:00.000","Title":"Python only reacts to 'py' command - How to revert to standard?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have no idea what I messed up, but it seems like a lot.\nThe problem:\n(I am using Windows 10, and only using the \"normal\" black terminal you get when you type \"CMD\" into the search.)\nI have installed Python 3.8, and subsequently deleted all older versions (2.6,2.7,3.7) of Python, since I figured I don't need them anymore. Now Python will only work if I type 'py' into the terminal window, 'python' can not find an appropriate command. (Along the way I messed up pip, but this is a different story.)\nIs this the \"normal\" command for Python 3? Did I rename my commands some time in the past? How do I use 'python' again? or should I not?\nWhen I install Python it never asks me how I want to name the command, so I figure installing it one more time will not help.\n(Sorry for maybe dumb questions, but this problem seems like one I can solve, before moving on to fixing pip.)","AnswerCount":2,"Available Count":2,"Score":0.0996679946,"is_accepted":false,"ViewCount":97,"Q_Id":59393856,"Users Score":1,"Answer":"As suggested by Andrew Morton in the first comment \"Turning it off and on again\" helped. I 'repaired' the Python 3.8 installation, and then closed and reopened the terminal window.\nNow:\n\nthe 'py' command is gone\nthe 'python' command uses python 3.8\nthe 'pip3' command finds python again (before it crashed looking for 3.7)\n\nThanks for the suggestion!","Q_Score":1,"Tags":"python-3.x,windows,terminal","A_Id":59394278,"CreationDate":"2019-12-18T14:10:00.000","Title":"Python only reacts to 'py' command - How to revert to standard?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I currently have a python project which basically reads data from an excel file, transforms and formats it, performs intensive calculations on the formatted data, and generates an output. This output is written back on the same excel file.\nThe script is run using a Pyinstaller EXE which basically is packing all the required libraries and the code itself, so every user is not required to prep the environment to run the script.\nBoth, the script EXE and the Excel file, sit on the user's machine.\nI need some suggestion on how this entire workflow could be achieved using AWS. Like what AWS services would be required etc.\nAny inputs would be appreciated.","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":98,"Q_Id":59397424,"Users Score":1,"Answer":"One option would include using S3 to store the input and output files.  You could create a lambda function (or functions) that does the computing work and that writes the update back to S3.\nYou would need to include the Python dependencies in your deployment zip that you push to AWS Lambda or create a Lambda layer that has the dependencies.\nYou could build triggers to run on things like S3 events (a file being added to S3 triggers the Lambda), on a schedule (EventBridge rule invokes the Lambda according to a specific schedule), or on demand using an API (such as an API Gateway that users can invoke via a web browser or HTTP request).  It just depends on your need.","Q_Score":1,"Tags":"python,amazon-web-services","A_Id":59397565,"CreationDate":"2019-12-18T17:37:00.000","Title":"Suggestions to run a python script on AWS","Data Science and Machine Learning":0,"Database and SQL":1,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I want to save the output of a task while it is running.\nI was able to save the output only after the task completion.\nI found in the C# azure sdk documentation that it has a SaveTrackedAsync function that enables to track a file and save it to a storage. Does the python SDK has a similar feature?\nThanks.","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":88,"Q_Id":59414688,"Users Score":1,"Answer":"The Batch Python SDK does not have a built in similar feature. You should be able to create a storage BlobClient specified to create an append blob type.","Q_Score":0,"Tags":"python,azure-batch,azure-sdk,azure-sdk-python","A_Id":59415023,"CreationDate":"2019-12-19T17:54:00.000","Title":"Saving output while tasking is running in Azure Batch (using python SDK)","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm trying to install psycopg2-binary on Mac OS Catalina and Python 3.8. The build fails always when try to install using pip3. Is there any solution for this in Catalina ?\n\"ERROR: Failed building wheel for psycopg2-binary\"","AnswerCount":2,"Available Count":1,"Score":0.4621171573,"is_accepted":false,"ViewCount":1462,"Q_Id":59419819,"Users Score":5,"Answer":"I was able to compile psycopg2 on OS X 10.15.1 Catalina with $VENV\/bin\/pip install psycopg2 after doing a couple of things, first:\n\nRe-installed xcode command line headers (though it may have just been that I accepted the new terms of service) using xcode-select --install\nLinked homebrew ssl headers using export LDFLAGS=\"-L\/usr\/local\/opt\/openssl@1.1\/lib\" and export CPPFLAGS=\"-I\/usr\/local\/opt\/openssl@1.1\/include\"\ninstalling with $VENV\/bin\/pip install psycopg2 where VENV is the directory of my virtual environment\n\nIt looks like some others have had successes with just the xcode, but I also needed to add ssl things to the path.","Q_Score":1,"Tags":"python,django,postgresql,virtualenv,psycopg2","A_Id":59449573,"CreationDate":"2019-12-20T04:30:00.000","Title":"\u201cFailed building wheel for psycopg2-binary\u201d - Mac OS Catalina using virtualenv","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"A website has been developed on a local ubuntu machine using python flask. The website runs fine on ubuntu at 127.0.0.1:5000. This website is supposed to go live on a godaddy server for which there is cpanel access. How to do it?","AnswerCount":2,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":348,"Q_Id":59425136,"Users Score":1,"Answer":"If it's a shared hosting solution, Answer to your question is NO, you can't do it. In a shared hosting environment Godaddy using only a PHP Stack. so you won't be able to use python there. Either go with VPS and configure your server. or go with a cloud service provider like Digital ocean, AWS, Linode etc.,","Q_Score":0,"Tags":"python,flask,cpanel,godaddy-api","A_Id":59425216,"CreationDate":"2019-12-20T12:17:00.000","Title":"Flask cpanel godaddy server","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I am trying to open my python files with a double click. I normally open them in anaconda prompt which uses the powershell file found in C:\\Windows\\System32\\WindowsPowerShell\\v1.0. I tried using open with and navigating to this file, however then the promt window opens and immediately closes... the script should run continuously.\nI also tried opening it with the \"python (command line)\" file which I found in C:\\ProgramData\\Microsoft\\Windows\\Start Menu\\Programs\\Python 2.7 I cannot open the location of that file for some reason using right click> open file location, however I tried to open my script using this but again the same thing happens.\nIt is frustrating as I need to close and open my scripts often. Each time I have to load up anaconda prompt, type in python and drag the file, and than press enter.\nAny help would be appreciated.\nI have installed Python 3.7 btw that I installed with ana and am trying to avoid reinstalling python as I have so many npm installs done that I did not keep a log of.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":240,"Q_Id":59429783,"Users Score":0,"Answer":"Try to open file\/folder in other IDE like vscode, pyCharm or text editor.\nOpen IDE first after that click on file menu and select open option.Browse the file\/folder and select it.","Q_Score":0,"Tags":"python,anaconda","A_Id":59429837,"CreationDate":"2019-12-20T18:22:00.000","Title":"Cannot open python files with double click","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Note: I did research on this over web but all of them are pointing to the solution which works on prem\/desktops. This case is on databricks notebook, I referred databricks help guide but could not find the solution.\nDear all, \nIn my local desktop i used to import the objects from other python files by referring their absolute path such as \n\"from dir.dira.dir0.file1 import *\"\nBut in Databricks python notebook i'm finding it difficult to crack this step since 2 hours. Any help is appreciated.\nBelow is how my command shows,\nfrom dbfs.Shared.ABC.models.NJ_WrkDir.test_schdl import *\nalso tried below ways, none of them worked\nfrom dbfs\/Shared\/ABC\/models\/NJ_WrkDir\/test_schdl import *\nfrom \\Shared\\ABC\\models\\NJ_WrkDir\\test_schdl import *\nfrom Shared\/ABC\/models\/NJ_WrkDir\/test_schdl import *\nfrom Shared.ABC.models.NJ_WrkDir.test_schdl import *\nThe error messages shows:\nModuleNotFoundError: No module named 'Shared\nModuleNotFoundError: No module named 'dbfs\nSyntaxError: unexpected character after line continuation character\n  File \"\", line 2\n    from \\Shared\\ABC\\models\\NJ_WrkDir\\test_schdl import *\n                                                         ^\nThank you!","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":149,"Q_Id":59432534,"Users Score":0,"Answer":"The solution is, include the command in child databricks python notebook as \n\"%run \/path\/parentfile\"\n(from where we want to import the objects from)","Q_Score":0,"Tags":"python,jupyter-notebook,databricks","A_Id":59459080,"CreationDate":"2019-12-21T00:05:00.000","Title":"In Databricks python notebook, how to import a file1 objects resides in different directory than the file2?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Using Python in Jupiter notebook in Anaconda and trying to access files on an external hard drive. I can access the hard drive using:\nos.chdir('\/Volumes')\nbut when I try to list the directories, I get the following error:\nOSError: [Errno 6] Device not configured\nAny suggestions?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":1410,"Q_Id":59440980,"Users Score":0,"Answer":"I got the same error, for me, the reason of the error, was a server connection lost. After the disconnection, the name of the path changed and the copy of the file failed.","Q_Score":1,"Tags":"python,macos,jupyter","A_Id":64680563,"CreationDate":"2019-12-22T01:06:00.000","Title":"OSError: [Errno 6] Device not configured","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I had Python 3.7.4 in D:\\python3.7.4 before but for some reason, I uninstalled it today, then I changed the folder name to D:\\python3.7.5 and installed python 3.7.5 in it, then, when I try to use pip in cmd I got a fatal error saying \n\nUnable to create processing using '\"Unable to create process using '\"d:\\python3.7.4\\python.exe\"  \"D:\\Python3.7.5\\Scripts\\pip.exe\"' \n\nI tried to change all things contain python3.7.4 in environment variable to python3.7.5 but the same error still exists, does anyone know how to fix this? \nThanks","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":204,"Q_Id":59448857,"Users Score":0,"Answer":"Try to create a new folder and run the installation there.\nThis should work, as I did the same myself to go install 2 different versions before","Q_Score":0,"Tags":"python,pip,windows-10","A_Id":59448973,"CreationDate":"2019-12-22T23:43:00.000","Title":"What cause pip did not work after reinstall python?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have an Airflow DAG which as one upstream task and around 40 downstream tasks from that one upstream (like 1 to 40 mapping). The upstream one finished successfully and for some reason I had to stop the downstream tasks. Now I want to execute all of them. Is there a way to do it by just executing one command (instead of clearing each individual downstream)?\nDoesn't matter if it is from the web UI or from the terminal.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":598,"Q_Id":59450849,"Users Score":0,"Answer":"If you want to re-execute all of the downstream tasks at the same time, click the 1 upstream task in the DAG UI and bring up it's Task UI. Press \"Downstream\", \"Clear\", and confirm you want to clear all tasks selected. Once that has been executed, mark the 1 upstream task as successful. All downstream tasks will then forget their previous state and re-execute.","Q_Score":0,"Tags":"python,airflow","A_Id":59459121,"CreationDate":"2019-12-23T06:12:00.000","Title":"run only downstream tasks not the current task - airflow","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Consider the following scenario:\nUser 1:\n\nFrom Address = \"sender@domain.com\"\nTo Address = \"Receiver_1@domain.com\"\nAttachment = \"common path --> file_1\"\n\nUser 2:\n\nFrom Address = \"sender@domain.com\"\nTo Address = \"Receiver_2@domain.com\"\nAttachment = \"common path --> file_2\"\n\nHow do i execute the above task if it is to be carried out for 500 unique users, with 500 unique attachments (1 unique attachment per unique user)?\nThanks in advance!","AnswerCount":3,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":189,"Q_Id":59461888,"Users Score":0,"Answer":"You will need to loop over 500 recipients and send a separate message to each address.","Q_Score":0,"Tags":"python,python-3.x,outlook,win32com","A_Id":59461921,"CreationDate":"2019-12-23T22:26:00.000","Title":"Personalized Attachments to Each Recipient From Outlook using Python","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a python program which is an interpreter, for a language that I have made. It is called cbc.py, and it is in a certain directory. Now, I want to know how I can call it, along with sys.argv arguments (like python3 cbc.py _FILENAME_TO_RUN_) in any directory. I have done research on the .bashrc file and on the PATH variable, but I can't find anything that really helps me with my problem. Could someone please show me how to resolve my problem?","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":285,"Q_Id":59462584,"Users Score":0,"Answer":"You need to make your script executable first and then add it to your PATH.\nIf you have your python script at ~\/path\/to\/your\/script\/YOUR_SCRIPT_NAME:\n\nadd #!\/usr\/bin\/python3 at the top of you script,\ngive executable permision to your script using sudo chmod a+x YOUR_SCRIPT_NAME,\nedit ~\/.bashrc to add your script path, e.g. echo PATH=\"$HOME\/path\/to\/your\/script:$PATH\" >> ~\/.bashrc,\nrestart or re-login or run source ~\/.bashrc,\nnow you can access your script via YOUR_SCRIPT_NAME anywhere.","Q_Score":1,"Tags":"python,linux,bash,path","A_Id":59462690,"CreationDate":"2019-12-24T00:29:00.000","Title":"How do I allow a file to be accessible from all directories?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"New to Python. \nI get the following error on doing a python --version on my GitBash. ...Appdata\/Local\/Microsoft\/WindowsApps\/python3: Permission Denied\nBased on some answers on this forum I turned off the App execution aliases for python. Doing this deleted the two \"stubs\" python.exe and python3.exe from my Windows App folder and resulted in another error of No such file or directory to my python --version on GitBash.\nI am a novice to python so it gets annoying to be stuck at the installation itself. What am I missing here ???\nIt's December and all these updates from Microsoft I assume has still not fixed this issue. Or?","AnswerCount":3,"Available Count":2,"Score":0.0665680765,"is_accepted":false,"ViewCount":14453,"Q_Id":59487242,"Users Score":1,"Answer":"Solved:\nPython commands won't work on mintty. \nI did a python -i to enter the python mode\nAnother option is to do a 'winpty python.exe'","Q_Score":4,"Tags":"python-3.x,windows,windows-store-apps,git-bash","A_Id":59536173,"CreationDate":"2019-12-26T10:42:00.000","Title":"Permission Denied error: Python 3.8 on Windows Gitbash","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"New to Python. \nI get the following error on doing a python --version on my GitBash. ...Appdata\/Local\/Microsoft\/WindowsApps\/python3: Permission Denied\nBased on some answers on this forum I turned off the App execution aliases for python. Doing this deleted the two \"stubs\" python.exe and python3.exe from my Windows App folder and resulted in another error of No such file or directory to my python --version on GitBash.\nI am a novice to python so it gets annoying to be stuck at the installation itself. What am I missing here ???\nIt's December and all these updates from Microsoft I assume has still not fixed this issue. Or?","AnswerCount":3,"Available Count":2,"Score":-0.1325487884,"is_accepted":false,"ViewCount":14453,"Q_Id":59487242,"Users Score":-2,"Answer":"simply uninstall the old one and install the new one you just downloaded. git team has already solved the issue is the last option when installing just check it to use it with python and other programs.","Q_Score":4,"Tags":"python-3.x,windows,windows-store-apps,git-bash","A_Id":65545975,"CreationDate":"2019-12-26T10:42:00.000","Title":"Permission Denied error: Python 3.8 on Windows Gitbash","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I want to check if a folder by the name \"Output Folder\" exists at the path\n\nD:\\LaptopData\\ISIS project\\test\\d0_63_b4_01_18_ba\\00_17_41_41_00_0e\n\nif the folder by the name \"Output Folder\" does not exist then create that folder there.\ncan anyone please help with providing a solution for this?","AnswerCount":7,"Available Count":1,"Score":0.057080742,"is_accepted":false,"ViewCount":38564,"Q_Id":59487696,"Users Score":2,"Answer":"Search for folder whether it exists or not, it will return true or false: os.path.exists('<folder-path>')\nCreate a new folder: os.mkdir('<folder-path>')\n\nNote: import os will be required to import the module.\nHope you can write the logic using above two functions as per your requirement.","Q_Score":27,"Tags":"python","A_Id":59487767,"CreationDate":"2019-12-26T11:20:00.000","Title":"check if a folder exists in a given path and if not then create a folder there","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am currently using Google ML notebooks to train a lot of my NLP projects. Lately, I wanted to use Kashgari, but there is an issue. The catch is Google notebooks run on Debian Stretch which contains Python <3.5. Kashgari, and hence I, need Python >3.6. One obvious way is to change from Stretch to Buster using debian's apt-get itself, and everything is good. Except, it overwrites grub settings and other side-effects which bricks the vc. The alternative would be to actually make update just the python without messing around with the rest of the system. What is the easiest way to do this? Note that I want the jupyter notebooks to use the new python3 version; so just a local venv will not be enough.","AnswerCount":2,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":1030,"Q_Id":59488799,"Users Score":1,"Answer":"You can always just download python from the source and compile it, it only takes 2 commands.\nHowever you shouldn't replace the system's python installation, a lot of its utilities use it, you should install another interpreter alongside it","Q_Score":0,"Tags":"python,google-cloud-platform,python-packaging,debian-based","A_Id":59489050,"CreationDate":"2019-12-26T12:55:00.000","Title":"Is there a way to update Python 3.5 to 3.6 on a debian stretch without apt-get upgrade?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"How do we really link the PyPDF2 to a different version of Python? I do have several version of Python installed in my Mac (Python 2.6, 2.7, 3.6 etc.,) \u2013 itsraghz May 24 at 5:09","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":25,"Q_Id":59489812,"Users Score":0,"Answer":"best way to do it is creating virtual environments in python as part of project source folders.\nconventional folder name for a python virtual environment is .venv\nto create a virtual environment:\n\n\nfrom command shell cd to project source directory\nrun [python] -m venv .venv [python] should be the path of the executable file or python it self if referenced in environment variables.  since there are multiple\n  python versions installed, using python executable path with desired\n  version would be ideal.\n\n\nthis way there can be n number of working environments with different python versions even with different library versions[i.e. for testing purposes]","Q_Score":0,"Tags":"python-3.x","A_Id":59490068,"CreationDate":"2019-12-26T14:32:00.000","Title":"How do we really link the PyPDF2 to a different version of Python?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am not able to run the command $ sudo ~\/mininet\/examples\/miniedit.py  in mininet.When I type that command to use miniedit the output comes as Traceback (most recent call last):\n  File \".\/mininet\/examples\/miniedit.py\", line 63, in \n    from mininet.log import info, debug, warn, setLogLevel\nImportError: No module named mininet.log","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":2093,"Q_Id":59517716,"Users Score":0,"Answer":"you have to execute miniedit.py  from remote terminal \"that has visualization\" using ssh .","Q_Score":1,"Tags":"python,pip,sdn,mininet","A_Id":59662070,"CreationDate":"2019-12-29T07:55:00.000","Title":"How to use miniedit in mininet?. Can anyone suggest the commands","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I know there are thousands of similar topics but my pip command has suddenly stopped to work and, despite all my researchs, I can't figure out why. It has been a while since I last used pip and surprisingly my computer doesn't recognize the command anymore. I reinstalled pip and the prompt tells me that the PATH variable is not correctly updated. So I update it but that doesn't solve the problem, the prompt still tells me the PATH variable is not updated. I've tried uninstalling and reinstalling python and pip and nothing works.\nIn my environment variables, I have a user variable named PATH and a system variable named PATH, both of them have the value :\nC:\\Users\\mertz\\AppData\\Local\\Programs\\Python\\Python38\\Scripts\\\nThe user variable was already written by itself and I had to write the system variable myself.\nWhen I'm installing pip I get this warning : \n\nWARNING: The scripts pip.exe, pip3.6.exe and pip3.exe are installed in 'C:\\Users\\mertz\\AppData\\Local\\Programs\\Python\\Python36-32\\Scripts' which is not on PATH.\n    Consider adding this directory to PATH or, if you prefer to suppress this warning, use --no-warn-script-location.\n\nAnd when I type pip in the command prompt, it tells me that pip is not recognized.\nWhat did I do wrong ?\nThanks in advance","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":13307,"Q_Id":59519317,"Users Score":0,"Answer":"I had a similar problem, at one time: I could only use administrative privileges to use python cmd or pip easy_install.\nPLEASE follow these procedures:\n\nGet to your environmental variables by pressing window + r and type-in, sysdm.cpl and click ok.\nCopy the pip link directory to the script folder in python,\nbut first check for pip, pip3, easy_easy, etc. \nIf it doesn't contain pip, you have to uninstall python and delete the folder, and then reinstall python.\n\ni.e \n\nC:\\Users\\mickeymouse\\AppData\\Local\\Programs\\Python\\Python38-32\\Scripts. \n\n\nYou will see user variables and system variables.\n(user variables are applied for only that user's account; system variable are applied to all accounts on the pc).\n\nCreate a path for both, then restart cmd.","Q_Score":2,"Tags":"python,path,pip","A_Id":59519548,"CreationDate":"2019-12-29T12:16:00.000","Title":"Unable to update PATH variable for pip on Windows 10","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"This question has many related questions, but none answers what I want to know:\nI usually work like this:\n\ninstall python 3.5+\nsudo apt install virtualenv\nvirtualenv -p \/usr\/bin\/python3.* bla\n. bla\/bin\/activate\npip install & run python\n\nThis seems to work perfectly, and I've done so also with python2.7. Is there a difference between using apt install virtualenv and apt install python3-virtualenv?","AnswerCount":3,"Available Count":2,"Score":0.0665680765,"is_accepted":false,"ViewCount":1470,"Q_Id":59551286,"Users Score":1,"Answer":"apt install virtualenv shall install python3-virtualenv as well I am pretty sure about that but I think that depends on what appears when you enter python on your terminal it is supposed to be version dependent.","Q_Score":1,"Tags":"python,ubuntu,virtualenv,apt","A_Id":59551372,"CreationDate":"2020-01-01T09:23:00.000","Title":"apt install virtualenv vs apt install python3-virtualenv","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"This question has many related questions, but none answers what I want to know:\nI usually work like this:\n\ninstall python 3.5+\nsudo apt install virtualenv\nvirtualenv -p \/usr\/bin\/python3.* bla\n. bla\/bin\/activate\npip install & run python\n\nThis seems to work perfectly, and I've done so also with python2.7. Is there a difference between using apt install virtualenv and apt install python3-virtualenv?","AnswerCount":3,"Available Count":2,"Score":0.0665680765,"is_accepted":false,"ViewCount":1470,"Q_Id":59551286,"Users Score":1,"Answer":"After some searching, I can say that package virtulenv is an overlay over python-virtualenv(Python 2 Virtual Env creator) and python3-virtualenv(Python 3 virtual Env creator). It is essential for command virtualenv to work (the one you type in terminal). Now, this command can internally use either of 2 versions provided by python.\nTherefore, if you do sudo apt install virtualenv it automatically installs python3-virtualenv along with it. However, you can install virtualenv with python2-virtualenv as well. \nSo, difference is that virtualenv package is the one which provides command line options(invokable via terminal) while python3-virtualenv(for python 3) does actual job of creating environment and is replaceable by python-virtualenv(for python 2).","Q_Score":1,"Tags":"python,ubuntu,virtualenv,apt","A_Id":59552020,"CreationDate":"2020-01-01T09:23:00.000","Title":"apt install virtualenv vs apt install python3-virtualenv","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I pulled a (seemingly popular, supported by Jupyter) jupyter-tensorflow Docker image using\ndocker pull jupyter\/tensorflow-notebook\nand started it successfully with \ndocker run -p 8888:8888 jupyter\/tensorflow-notebook\nHowever, upon navigating to http:\/\/127.0.0.1:8888\/?token=177a...., I am prompted for a password or token (despite the token already being present in the URL). \nI know of no password to use, and the token 177a... does not work. \nAny suggestions?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":1754,"Q_Id":59556013,"Users Score":5,"Answer":"The answer turned out to be quite easy: there was an other Jupyter notebook server I wasn't aware of running. Closing it did the trick.","Q_Score":0,"Tags":"python,docker,jupyter-notebook","A_Id":59556331,"CreationDate":"2020-01-01T20:51:00.000","Title":"Invalid token when trying to login into Jupyter notebook with Docker jupyter\/tensorflow-notebook","Data Science and Machine Learning":1,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am following the Obey the testing goat book and I try to automate some shell command server side using Fabric3\nI have an issue concerning thefab deploy:host=yyy@xxx\nyyy being username\nxxx being folder name of my domain name\nWhenever I run this command, I get Login password for 'xxx': and it just never seem to work even though I enter the correct one\nHere is what I did so far:\n1- did ssh-keygen locally and on the server\n2- added on local side a file named authorized_keys which contains id_rsa.pub generated on server side\n3- did the same operation on server side  \nBasically, both sides have a file named authorized_keys \nLocal side (resp. server side) have authorized_keys which is just a copy of id_rsa.pub generated by the ssh-keygen command on server side (resp. local side)\nCould anyone review what I did so far and tell me if I DID understand the problem (or not), and what should I do to resolve this issue\nThank vm","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":63,"Q_Id":59561008,"Users Score":0,"Answer":"I have no clue how I managed to make it work...\nBasically, I deleted the old public key that I had linked to my user in my digitalocean droplet's settings, and generated a new one, on the local terminal using ssh-keygen, then I did the basic configuration by copying this public key server-side on following path ~\/.ssh\/authorized_keys ...\nNow, it does still asks for my password, but does proceed to the execution of my fabfile script after correct password input\nI'm thinking that the 'proper' way to setup a ssh with one's user is to do it manually through command-line ?\nAnyway, problem 'solved'","Q_Score":0,"Tags":"python,django,server,automated-tests,fabric","A_Id":59592322,"CreationDate":"2020-01-02T09:30:00.000","Title":"fabric3 : Intempestive Login for password when trying to run fab command","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"The server currently has CentOS 6.9 with GLIBC 2.12 and tensorflow 1.14.\ntensorflow is throwing error saying that it needs GLIBC 2.15.\nNow I want to upgrade tensorflow to 2.0 but I want to know what's a working GLIBC version for tensorflow 2.0 on CentOS 6.9 before doing so.\nI didn't seem to find any source to state this compatibility issue. Does anyone here know?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":308,"Q_Id":59569722,"Users Score":0,"Answer":"Just tested and tensorflow 2.0 works fine with GLIBC 2.12.\nIt was tensorflow 1.14 that's not compatible with GLIBC 2.12.","Q_Score":0,"Tags":"python,tensorflow,python-3.6,centos6,tensorflow2.0","A_Id":59652333,"CreationDate":"2020-01-02T20:40:00.000","Title":"What's a compatible GLIBC version for tensorflow 2.0 for python3.6.8 on CentOS 6.9?","Data Science and Machine Learning":1,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have learned about python script to shutdown the pc like: os.system(shutdown \/s \/t 0)\nBut what I was wondering about is to write a script using python which will start up the pc at a specific time after its been shutdown. The os I am using is Windows10.\nCan anyone help me please.","AnswerCount":2,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":477,"Q_Id":59600718,"Users Score":1,"Answer":"It is not possible directly. When your system is shut down no programs can run, including python. However it might be possible to set up Wake On Lan functionality and use python on another computer to send the WOL packet.\nAnorher solution would be to go into BIOS (UEFI on newer machines) and schedule wakeup times. No python needed. Or thereay be a way to use python on Win10 to modify UEFI settings in order to set up a wakeup event","Q_Score":0,"Tags":"python,python-3.x,windows","A_Id":59600767,"CreationDate":"2020-01-05T14:11:00.000","Title":"How to start up pc (windows) using python","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have python script, but my computer is closed. Is there any method which i can use task scheduler even though my computer closed, any cloud service?","AnswerCount":3,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":559,"Q_Id":59618430,"Users Score":0,"Answer":"All of the major cloud providers have some sort of cloud function.  On Azure it's called Function App, on AWS I believe it's called a lambda function.  You can essentially create a python function, deploy it to either service, and have it write the results to whatever the cheapest cloud db option they have on either service.","Q_Score":0,"Tags":"python,windows-task-scheduler","A_Id":59618921,"CreationDate":"2020-01-06T20:20:00.000","Title":"How to schedule tasks when computer is closed?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have python script, but my computer is closed. Is there any method which i can use task scheduler even though my computer closed, any cloud service?","AnswerCount":3,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":559,"Q_Id":59618430,"Users Score":0,"Answer":"You can use AWS Lambda to deploy your code, AWS Cloudwatch events to trigger your application using a cron regex, and some database service. This will allow you to set the schedule to run your code on any schedule you should choose. Both cloudwatch and lambda of these services are mostly covered by the aws free tier and your usage should not cost anything.\nFor the database you have AWS dynamoDB for a nosql option and AWS RDS for a relation db option. I would suggest starting with dynamoDB because basic usage is covered by the free tier and it's pretty easily to get started. You could try rds, but if you are unfamiliar with it you may risk a high unintentional expense.","Q_Score":0,"Tags":"python,windows-task-scheduler","A_Id":59633240,"CreationDate":"2020-01-06T20:20:00.000","Title":"How to schedule tasks when computer is closed?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am using a Cloud function that is triggered by a bucket to process that file and save the result in another bucket. (more specfically using Pyinstaller to compile python files into executable). However it is cumbersome to operate with a read-only filesystem where I can only use the \/tmp folder also with an underlying operating system that lacks some system packages I need.\nUsing docker could solve my problem but not sure whether I should use in a cloud function or in another way.","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":68,"Q_Id":59619873,"Users Score":0,"Answer":"Cloud Run is best option if you want to use containerised application.","Q_Score":1,"Tags":"python-3.x,linux,docker,google-cloud-platform,google-cloud-functions","A_Id":59631101,"CreationDate":"2020-01-06T22:34:00.000","Title":"Is it good practice to use Docker in a Cloud Function?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am using an anaconda environment in VS code when suddenly the Run Python File in Terminal command bound to the green play-button in the top right corner stopped working. It used to input: python_path file_path\/file.py into the terminal and it worked perfectly fine. \nBut after running my code in the anaconda prompt program it has now changed to: \n& conda run -n env_name python file_path\/file.py and now I get a ModuleNotFoundError, that I don't have cv2 installed, which I do.\nI can still run the code if I simply input: python file_path\/file.py. My question is if it is possible to change the command that is bound to Run Python File in Terminal. I could not find a solution to this in a couple hours of searching. Thanks in advance.","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":861,"Q_Id":59646975,"Users Score":0,"Answer":"One solution I found was to reinstall the older python plugin and the \"conda run -n\" command would not be used at runtime.\nReinstallation method, Extension --> Python--manage--> install another version","Q_Score":0,"Tags":"python,opencv,visual-studio-code","A_Id":59659011,"CreationDate":"2020-01-08T13:30:00.000","Title":"Change Python:Run Python File in Terminal command in Visual Studio Code","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to clone my device data and stream the device data to another IoThub in an entirely different organization, the organization here I mean a different vendor cloud. \nTrial:\nI have tried routing the messages to service bus topics from my IoThub and then written a container using the service bus SDK which can subscribe to these topics and push the data to Azure IoT hub in a different vendor cloud.  \nASK: \nIs there any other best way for sending the device stream to another vendor Azure IoThub other than the above using Azure alone. \nI can directly stream the device data from the data source, which is clearly not the use case.\nUsing IoT-device, not IoT-Edge.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":62,"Q_Id":59655683,"Users Score":0,"Answer":"What you want to achieve is not possible out of the box. You need a processor in the middle that picks up messages from IoT Hub A - for instance on its built-in Event Hub endpoint. Then the processor would need to impersonate each device for which it got a message from A, and send the message to IoT Hub B, using the device credentials for the respective device.\nYou could for example build this with an Azure Function. But you need to build all this yourself.","Q_Score":0,"Tags":"azure-iot-hub,azure-eventhub,azure-servicebus-queues,azure-servicebus-topics,azure-sdk-python","A_Id":59682644,"CreationDate":"2020-01-09T00:31:00.000","Title":"Streaming device data from IoThub in one organization(Org\/Client A) to IoThub in entirely different organization(Org\/Client B)","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm trying to install a 3.6 python version on a RHEL 4 Enterprise edition that already have a 2.3 python version, however, I have no internet access nor a root access?\nAlso I'd like to install some libraries the same conditions applied.\nI'm a beginner so please help me","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":96,"Q_Id":59679970,"Users Score":0,"Answer":"My guess is that RHEL 4 is 16+ years old and Python 3 didn't exist then. Can you install a newer RHEL version via a usb\/other? The latest version is RHEL 8.","Q_Score":0,"Tags":"python,python-3.x,rhel","A_Id":59694312,"CreationDate":"2020-01-10T10:37:00.000","Title":"How to Install Python 3.6 on RHEL 4 Enterprise Edition without Internet Access and no root access?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I tried to type pip install pipenv in Visual Studio Code, then i got 'pip' is not recognized as an internal or external command, operable program or batch file. So i was looking for some solution at the internet and there i found that i have to add path to windows enviroment variables. I found the pip file in location C:\\Users\\MyName\\AppData\\Local\\Programs\\Python\\Python38-32\\Scripts\\ and there are pip3.8, pip3, pip, pipenv and any other files. Also i found in location C:\\Users\\MyName\\AppData\\Local\\Programs\\Python\\Python37-32\\Scripts\\ files: pip, pip3.7, pip3(it is from older version of python i think). The current PATH in system enviroment variables is C:\\Users\\Patrik\\AppData\\Local\\Programs\\Python\\Python38-32\\Scripts\\pip3.8.exe. I tried to reinstall python, add pip during installation and nothing helped me to fix it.\nAny ideas guys?\nI'm using Windows 8.1 and Python 3.8","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":58,"Q_Id":59706769,"Users Score":0,"Answer":"use use python -m pip install pipenv this will use your current system python pip version to install pipenv and you don't need to worry about the version","Q_Score":0,"Tags":"python,python-3.x,visual-studio-code,pip","A_Id":59706801,"CreationDate":"2020-01-12T18:14:00.000","Title":"many pip files, which is right?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"While trying to set up PyCharm with a Conda environment, I looked into my environment, but pythonw.exe is not showing up. I am on OS X","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":320,"Q_Id":59744046,"Users Score":1,"Answer":"pythonw.exe is Windows specific. Windows has a strict segregation between command line applications and non-command line applications; pythonw.exe is just Python declared as a non-command line application so a command prompt isn't created for scripts it runs (typically you don't want one for GUI applications).\nOn any other system, including OSX, plain python (or python3, as appropriate) handles both command line and non-command line applications.","Q_Score":0,"Tags":"python,anaconda","A_Id":59744076,"CreationDate":"2020-01-15T01:33:00.000","Title":"in anaconda, pythonw.exe is not showing up inside my directory. what can i do?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to run the command mkvirtualenv virt from the Windows 10 command line and am getting the error ERROR: virtualenv \"virt\" already exists even though there is no content in the directory that I am running this command from. Any ideas what may be happening?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":15,"Q_Id":59755487,"Users Score":0,"Answer":"mkvirtualenv is a part of virtualenvwrapper \u2014 a virtualev manager that creates all environments not in the current directory but in ~\/.virtualenvs so you can only have one virt there. If you want a virtualev in the current directory use virtualev but then you loose all the power of virtualenvwrapper.","Q_Score":0,"Tags":"python-3.x,windows-10,virtualenv,virtualenvwrapper","A_Id":59755729,"CreationDate":"2020-01-15T16:16:00.000","Title":"mkvirtualenv virt command thinks virt directory already exists","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm currently on the steep part of the learning curve with a Linux server and running into a very frustrating issue.\nInitially, I was running python scripts from the root user, then I learned that this was bad and created a new user and am working on migrating everything over to this new user. For some reason, when I set up the new user in exactly the same way that I set up the root I can no longer run the active file. From the root user, I can either click 'run active file' or the small play button in the top right corner but that disappears when I log in as the new user. \nI receive the error message '''only files on disk can be run in the terminal'''\nAny ideas on where I'm going wrong? Like I said still learning this stuff so if any more detail is needed please let me know.\nThanks!!","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":292,"Q_Id":59760784,"Users Score":0,"Answer":"Well this was dumb, the Python extension was installed when running the root but had to separately install the extension for the additional user. Fixed the issue.","Q_Score":0,"Tags":"python,linux,visual-studio,linode","A_Id":59773887,"CreationDate":"2020-01-15T23:00:00.000","Title":"Cannot run active file in visual studio when connected to linux server","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have to automate certain tests daily using cron job. I specify my shell script in my cron job. First, I have to first start my spring-boot application. I do that using the java -jar spring-boot-app.jar command. Then I need to execute a python script after starting the spring-boot app. I've put both these 2 commands in a shell script. But the problem is the python script is not being run, after starting the spring-boot app from the shell script. How do I start the python script too? I tried opening a new terminal using gnome-terminal in my script, but this command doesn't work in a remote machine. How do I start both the spring-boot app and the python command?","AnswerCount":2,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":357,"Q_Id":59763543,"Users Score":1,"Answer":"I think the answer above by UtLox will resolve your problem, because the \"&\" at the end will run your Spring Boot application in the background","Q_Score":1,"Tags":"java,python,shell,cron","A_Id":59763697,"CreationDate":"2020-01-16T05:32:00.000","Title":"how to run both java and python command in a shell script","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I have a Dash app that was working just fine moments ago. After a few edits (notably adding some dcc.Store objects), the app got completely frozen: it launches, makes a few callbacks, but then becomes the callbacks don\u2019t work and the editable tables won\u2019t edit (though I can change tabs). \nSince I have no error message in the console, it\u2019s like some process is running in the back, but it seems that no callback is running in the back (I put some print calls at the beginning of each callback and can\u2019t see anything in the console).\nThe last callback edits some data in some dcc.Store ; could it be that there is too much data stored?\nAlso I am using Dash 1.7.0\nThank you for your help,\nBest,\nVincent","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":678,"Q_Id":59766523,"Users Score":2,"Answer":"As suggested on the plotly forum, the solution was to look at the JS console of chrome: ctrl+shift+j. I could see some error messages there.","Q_Score":1,"Tags":"python,plotly-dash","A_Id":59768638,"CreationDate":"2020-01-16T09:29:00.000","Title":"Dash app seems to be frozen due to some processes in the back","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"pre-commit hooks are run in a separate virtual environment (or Docker container). However our code is running on Docker and we're also developing using Docker.\nUp until now we didn't have to install any dependencies on our host systems, but when running mypy, isort and pylint they run into problems because they can't access the dependencies installed. \nOur first idea was to install the dependencies in a virtual environment on the host system, but\nthat also seems like a clumsy workaround.\nIs there a good way to run pre-commit with full access to the container?","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":1619,"Q_Id":59773666,"Users Score":0,"Answer":"How about creating a special container for code style checks?\nIt should have all needed linters installed and a bash file to check code directory.\nYour hook command will look something like docker run -v [mount code dir to container in RO mode] codestyle_check_container","Q_Score":6,"Tags":"python,python-3.x,docker,pylint,pre-commit","A_Id":59773792,"CreationDate":"2020-01-16T16:09:00.000","Title":"Running pre-commit hooks (e.g. pylint) when developing with docker","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Clients will like a standalone solution due to poor internet around so I want to know the difference using SDK and containers for cognitive services.\nIts clear about useage information being sent back for billing when using containers but whats seperates using containers and SDK?","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":40,"Q_Id":59782992,"Users Score":1,"Answer":"Using SDK:\nThe SDK is an accelerator avoiding to implement the REST API calls to Microsoft backend, but it is what it is doing behind. So in that case, your payload (whether it is an image or an image Url) will be sent to the backend. In the scenario where you have a poor internet access, it can be blocking in the case of the image.\nIf you use an image Url, it's the backend which will get it so it's less blocking but if your access is really limited, it may be blocking.\nUsing containers:\nIn the case of containers, you have access to the same capabilities but they run locally where you deploy the container: everything is processed locally.\nSo if you bandwidth is limited (or don't want your images to be processed by Microsoft endpoint), it is interesting.\nBUT (yes, nothing is perfect!) you still need a (smaller) internet connectivity as the container will send small payload to Azure about the billing. Those items are not sent synchronously but if you cannot send them regularly (if I remember well, it is a 15min window maximum), the container will stop working","Q_Score":0,"Tags":"c#,python,azure,microsoft-cognitive","A_Id":59821150,"CreationDate":"2020-01-17T07:36:00.000","Title":"In Azure Cognitve Services [Face API] Whats the difference Between Using SDK and Containers","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"When trying to run simple python3 code via pycharm, I get following error\n\n\/Users\/slimerski\/PycharmProjects\/studia\/venv\/bin\/python \/Users\/slimerski\/PycharmProjects\/studia\/zadania_14.py\n      dyld: Library not loaded: \/usr\/local\/Cellar\/python\/3.7.4_1\/Frameworks\/Python.framework\/Versions\/3.7\/Python\n  Referenced from: \/Users\/slimerski\/PycharmProjects\/studia\/venv\/bin\/python\n  Reason: image not found\nProcess finished with exit code 134 (interrupted by signal 6: SIGABRT)\n\nEverything was working until recently I have installed zsh and updated xcode via brew.\nI have tried fixing it with otool -L exefile but instead I get another error \n\n\/Library\/Developer\/CommandLineTools\/usr\/bin\/objdump: error: 'exefile': No such file or directory.\n\nIs there anyway to fix it?","AnswerCount":3,"Available Count":1,"Score":0.0665680765,"is_accepted":false,"ViewCount":9628,"Q_Id":59800501,"Users Score":1,"Answer":"Maybe you uninstall that version of python, in this case 3.7... You have to download it again and execute","Q_Score":6,"Tags":"python,xcode,macos,pycharm,dyld","A_Id":59860191,"CreationDate":"2020-01-18T12:17:00.000","Title":"dyld: Library not loaded: \/usr\/local\/Cellar\/python\/3.7.4_1\/Frameworks\/Python.framework\/Versions\/3.7\/Python","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Other similar answers are out of date or focus on a particular error and not the whole process.\nWhat is the full installation process of mod_wsgi into an Apache installation on Windows 10?","AnswerCount":2,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":10474,"Q_Id":59801387,"Users Score":2,"Answer":"Also be sure to check that your Apache and Python got same architecture (32\/64bit) and MS Build Tools is compatible with Python version.\nBeen trying to compile mod_wsgi using different combinations of MS Build Tools for a few hours before I noticed that Python 3.8 is 32bit and Apache Lounge 2.4 is 64bit.","Q_Score":10,"Tags":"python,windows,apache,mod-wsgi,wsgi","A_Id":63749301,"CreationDate":"2020-01-18T14:11:00.000","Title":"How to install mod_wsgi into Apache on Windows?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I was hoping that this would be fixed in the newer version but I see the same thing.  Every time a file is executed the console displays the runfile() and wdir and it clutters the console.  Is there a way to hide this?\nrunfile('C:\/Users\/One\/Desktop\/Training\/Week1\/Files\/file1.py',wdir='C:\/Users\/One\/Desktop\/Training\/Week1\/Files\/file1.py'), wdir=\"\/directory\/","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":310,"Q_Id":59802264,"Users Score":1,"Answer":"(Spyder maintainer here) There's no way (and there's never going to be one) to hide that command because it's needed to evaluate your code in the console.\nHowever, we're thinking to remove the wdir part, unless users declare a specific working directory to run their files.","Q_Score":0,"Tags":"python-3.x,spyder","A_Id":59803297,"CreationDate":"2020-01-18T15:59:00.000","Title":"Hidding the runfile() command in Spyder 4.0","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have installed the Anaconda 3 in my windows 10 and it has not installed the Scripts folder and the Anaconda Prompt or Navigator applications. \nI have come here and in other sources for an answer and tried to reinstall, use the cmd as adm to install with the conda commands, but the system does not recognize the conda command. I have seen answers with the Scripts folder, but it was not installed.\nI have also seen answers advising me to install miniconda and then update to anaconda, but again, miniconda has the same problem as anaconda: no scripts folder, no recognition of the conda command. \nI don't know what to do.","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":316,"Q_Id":59812998,"Users Score":0,"Answer":"I work on a hp Probook with windows 10 and the problem was that the application hp Sure Sense Installer block the installation of anaconda. After uninstalling the hp Sure Sense Installer application and reinstalling anaconda, everything works fine !","Q_Score":0,"Tags":"cmd,anaconda,windows-10,python-3.7,miniconda","A_Id":72025624,"CreationDate":"2020-01-19T18:14:00.000","Title":"Anaconda installer not working - Windows 10","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have installed the Anaconda 3 in my windows 10 and it has not installed the Scripts folder and the Anaconda Prompt or Navigator applications. \nI have come here and in other sources for an answer and tried to reinstall, use the cmd as adm to install with the conda commands, but the system does not recognize the conda command. I have seen answers with the Scripts folder, but it was not installed.\nI have also seen answers advising me to install miniconda and then update to anaconda, but again, miniconda has the same problem as anaconda: no scripts folder, no recognition of the conda command. \nI don't know what to do.","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":316,"Q_Id":59812998,"Users Score":0,"Answer":"Dear all who may have had the same problem, what worked for me was to install the 32-bit version, I had heard it was more stable.\nI did not have to restart Windows after installing this version, It was already there, Anaconda Prompt and Navigator.","Q_Score":0,"Tags":"cmd,anaconda,windows-10,python-3.7,miniconda","A_Id":59847628,"CreationDate":"2020-01-19T18:14:00.000","Title":"Anaconda installer not working - Windows 10","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Using VSC Python extension 'Run File in Terminal' has suddenly stopped working.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":63,"Q_Id":59813702,"Users Score":0,"Answer":"Spent two days, trying every fix I could find on the net. Nothing worked. In desperation, turned off Malwarebytes (using Quit Malwarebytes from the sys tray icon). VSC Python 'Run File in Terminal' now works !!. Turns out to be the Ransomeware Protection layer causing the problem. VSC runs fine with this layer disabled. Hope this helps someone else. Cheers\nUpdate 09.03.20\nAfter constant badgering from Malwarebytes I installed their latest release, version 4.1.0.56, for my system (Win 7). Malwarebytes is still duff running VSC 'Run File in Terminal', until I turn off 'Ransomeware Protection'. So it looks like I will have to put up with Malwarebytes badgering me about this protection being turned off, or junk Malwarebytes, which I have paid for. Cheers Russ","Q_Score":0,"Tags":"python","A_Id":59829302,"CreationDate":"2020-01-19T19:37:00.000","Title":"Visual Studio Code Python extension 'Run File in Terminal' not working","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I can't run python scripts just by typing python nameofthescript.py on Windows 10 cmd. The only way to make it work is by typing python followed by space and C:\\script\\directory\\nameofthefile.py.\nI just would like to use a quick way to run python scripts. Already tried to type py instead of python.\nI've already added the directory to the PATH environment variable. Have not been able to find the answer online. If more information is needed to solve the problem, I can try to provide it.","AnswerCount":3,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":4914,"Q_Id":59832392,"Users Score":0,"Answer":"Your command prompt should be in the folder with the file in it. Eg, if you cd C:\\script\\directory then you could  python nameofthescript.py","Q_Score":1,"Tags":"python,python-3.x,cmd,windows-10","A_Id":59832411,"CreationDate":"2020-01-20T23:49:00.000","Title":"Running python scripts on windows 10 cmd just by typing python nameofthescript.py","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I can't run python scripts just by typing python nameofthescript.py on Windows 10 cmd. The only way to make it work is by typing python followed by space and C:\\script\\directory\\nameofthefile.py.\nI just would like to use a quick way to run python scripts. Already tried to type py instead of python.\nI've already added the directory to the PATH environment variable. Have not been able to find the answer online. If more information is needed to solve the problem, I can try to provide it.","AnswerCount":3,"Available Count":2,"Score":-0.0665680765,"is_accepted":false,"ViewCount":4914,"Q_Id":59832392,"Users Score":-1,"Answer":"Check if your file has permission to be executed. I'm not familiar with Windows, but on Linux it's chmod +x name_of_file.py, or with sudo, if you need root privileges. Also, check your python default version, because in most cases python calls python2.7 and not python3...","Q_Score":1,"Tags":"python,python-3.x,cmd,windows-10","A_Id":59832496,"CreationDate":"2020-01-20T23:49:00.000","Title":"Running python scripts on windows 10 cmd just by typing python nameofthescript.py","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a requirement a parent python script calling multiple other python script along with the parameter. \nI have created a bat file calling the parent python script. When I run the parent python script\/bat file all the other python files called inside the parent python script gets executed but in scheduler those files get skipped. However with proper logging I'm able to see to commands before and after the call of child python files are getting executed.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":21,"Q_Id":59852490,"Users Score":0,"Answer":"Before calling any python code inside the another python code, the execute location goes to the windows default execute location and that was the reason child python files werent called.\nuse os.chdir() to change the working directory to the child python location","Q_Score":0,"Tags":"python","A_Id":60684925,"CreationDate":"2020-01-22T04:09:00.000","Title":"Windows scheduler isnt calling other python files from main python","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Im trying to install a venv in python3 (on CentOS). However i get the following error:\n\nError: Command '['\/home\/cleared\/Develop\/test\/venv\/bin\/python3', '-Im',\n  'ensurepip', '--upgrade', '--default-pip']' returned non-zero exit\n  status 1.\n\nI guess there is some problem with my ensurepip...\nRunning python3 -m ensurepip results in \n\nFileNotFoundError: [Errno 2] No such file or directory:\n  '\/usr\/lib64\/python3.6\/ensurepip\/_bundled\/pip-9.0.3-py2.py3-none-any.whl'\n\nLooking in the \/usr\/lib64\/python3.6\/ensurepip\/_bundled\/ I find pip-18.1-py2.py3-none-any.whl and setuptools-40.6.2-py2.py3-none-any.whl, however no pip-9.0.3-py2.py3-none-any.whl\nRunning pip3 --version gives\n\npip 20.0.1 from \/usr\/local\/lib\/python3.6\/site-packages\/pip (python\n  3.6)\n\nWhy is it looking for pip-9.0.3-py2.py3-none-any.whl when I'm running pip 20.0.1, and why to i have pip-18.1-py2.py3-none-any.whl? And how to I fix this?","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":2273,"Q_Id":59855477,"Users Score":0,"Answer":"I would make a clean reinstall of Python (and maybe some of its dependencies as well) with your operating system's package manager (yum?).","Q_Score":1,"Tags":"python,python-3.x,pip,centos,python-venv","A_Id":60078378,"CreationDate":"2020-01-22T08:29:00.000","Title":"Venv fails in CentOS, ensurepip missing","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Im trying to install a venv in python3 (on CentOS). However i get the following error:\n\nError: Command '['\/home\/cleared\/Develop\/test\/venv\/bin\/python3', '-Im',\n  'ensurepip', '--upgrade', '--default-pip']' returned non-zero exit\n  status 1.\n\nI guess there is some problem with my ensurepip...\nRunning python3 -m ensurepip results in \n\nFileNotFoundError: [Errno 2] No such file or directory:\n  '\/usr\/lib64\/python3.6\/ensurepip\/_bundled\/pip-9.0.3-py2.py3-none-any.whl'\n\nLooking in the \/usr\/lib64\/python3.6\/ensurepip\/_bundled\/ I find pip-18.1-py2.py3-none-any.whl and setuptools-40.6.2-py2.py3-none-any.whl, however no pip-9.0.3-py2.py3-none-any.whl\nRunning pip3 --version gives\n\npip 20.0.1 from \/usr\/local\/lib\/python3.6\/site-packages\/pip (python\n  3.6)\n\nWhy is it looking for pip-9.0.3-py2.py3-none-any.whl when I'm running pip 20.0.1, and why to i have pip-18.1-py2.py3-none-any.whl? And how to I fix this?","AnswerCount":2,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":2273,"Q_Id":59855477,"Users Score":2,"Answer":"These versions are harcoded at the beginning of .\/lib\/python3.8\/ensurepip\/__init__.py. You can edit this file with the correct ones.\nRegarding the reason of this corruption, I can only guess. I would bet on a problem during the installtion of this interpreter.","Q_Score":1,"Tags":"python,python-3.x,pip,centos,python-venv","A_Id":60042378,"CreationDate":"2020-01-22T08:29:00.000","Title":"Venv fails in CentOS, ensurepip missing","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"With Django 1.8 I used Django-celery to run asynchronous tasks and I was able to debug them in my IDE (either PyCharm or Eclipse+PyDev) just launching \"python celery worker\" in debug mode.\nDjango-celery doesn't support Django 2.2, so I have to run pure celery.exe.\nCelery docs say that I have to add pdb to my code and run debug via console.\nHow can I debug these tasks as I did before, adding breakpoints dynamically from my IDE?","AnswerCount":3,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":558,"Q_Id":59863762,"Users Score":0,"Answer":"Telnet solution doesn't work for me.\nBut I was able to debug my tasks with pdb.\nAdd breakpoint: pdb.set_trace().\nThen just run worker with -l warning, it will prevent printing of excessive info.","Q_Score":1,"Tags":"python,django,celery,django-celery,pdb","A_Id":72050714,"CreationDate":"2020-01-22T16:03:00.000","Title":"Celery + Django on Windows: debugging asynchronous tasks","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"With Django 1.8 I used Django-celery to run asynchronous tasks and I was able to debug them in my IDE (either PyCharm or Eclipse+PyDev) just launching \"python celery worker\" in debug mode.\nDjango-celery doesn't support Django 2.2, so I have to run pure celery.exe.\nCelery docs say that I have to add pdb to my code and run debug via console.\nHow can I debug these tasks as I did before, adding breakpoints dynamically from my IDE?","AnswerCount":3,"Available Count":2,"Score":0.1973753202,"is_accepted":false,"ViewCount":558,"Q_Id":59863762,"Users Score":3,"Answer":"You can use CELERY_ALWAYS_EAGER = True setting in you development env. If this is True, all tasks will be executed locally without sending it to a queue.","Q_Score":1,"Tags":"python,django,celery,django-celery,pdb","A_Id":59863960,"CreationDate":"2020-01-22T16:03:00.000","Title":"Celery + Django on Windows: debugging asynchronous tasks","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I have a python module. i have different observations of RAM usage when run in different machines.\n\nIf i run it on Ubuntu PC, it runs with 8 MB of RAM\nIf i run the same program on an ARM processor, it runs with around 15 MB RAM. \n\ni would like to know, what are the parameters which are reasons for behavior and i would like to know if i can try to run it with 8 MB of RAM on the ARM processor too because i have only 32 MB of free RAM left there? \nIs it because of cross compiled python interpreter?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":33,"Q_Id":59879658,"Users Score":0,"Answer":"Same program can have different RAM usage on different processors. It depends on the processor's instruction set. e.g RISC based processors use more number of instructions for the same task than CISC based processors, hence more lines of assembly code. More lines of code means more RAM usage. So the architecture of the processor and its instruction set can have impact on the RAM usage.","Q_Score":0,"Tags":"python,memory,memory-management","A_Id":64352431,"CreationDate":"2020-01-23T13:25:00.000","Title":"Is it possible that a program uses different sizes of RAM on two different processors?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Why does Gunicorn send info message Handling signal: winch when application is idle?\nThere is no error, as the application continues to respond, but when it is idle, the above message is displayed.\nI could not find more information in Gunicorn handling signal documentation section except\nWINCH: Gracefully shutdown the worker processes when Gunicorn is daemonized.\n\nWhat is the meaning here, Gunicorn daemonized?\nHandling signal: winch info when idle, does one need to take some action for this?\nAny brief info on WINCH and all other signal meanings?","AnswerCount":1,"Available Count":1,"Score":1.0,"is_accepted":false,"ViewCount":8094,"Q_Id":59884188,"Users Score":23,"Answer":"A winch signal (or SIGWINCH, short for Signal Window Change) is normally sent to applications when the terminal window size changes, so that applications know to redraw on the screen. However, gunicorn interprets it to shutdown the worker processes, but only when the application is daemonized. Daemonized is just another way of saying an application is running in the background. This means that while gunicorn isn't running as a background process (i.e. it's on your screen), it handles the signal and doesn't shut down the worker processes.\nSo to answer your questions:\n\nDaemonized means an application is running in the background.\nYou don't have to take any action at all, when gunicorn is running in the background it won't be getting any Winch signals, so you don't have to worry about it shutting down.\nWinch is normally sent when a terminal window is resized (you can see this by resizing your terminal window while gunicorn is visible, you'll see a lot of handling signal messages).","Q_Score":25,"Tags":"python,gunicorn,uwsgi","A_Id":64144036,"CreationDate":"2020-01-23T17:30:00.000","Title":"Gunicorn sends info message Handling signal: winch","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"Is there any way to run workflows by not using celery or kubernetes. Doc specifies only two ways to run it in multi-cluster mode. Can't I just have another multiple EC2 instances to run my workers for computations. (Without using celery or kubernetes).","AnswerCount":2,"Available Count":2,"Score":0.0996679946,"is_accepted":false,"ViewCount":253,"Q_Id":59895455,"Users Score":1,"Answer":"The only way to accomplish what you want is to write your own Executor (EC2Executor?) that fulfils your requirements.","Q_Score":0,"Tags":"python,amazon-ec2,celery,airflow","A_Id":59899008,"CreationDate":"2020-01-24T11:22:00.000","Title":"Apache Airflow without celery or kubernetes","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Is there any way to run workflows by not using celery or kubernetes. Doc specifies only two ways to run it in multi-cluster mode. Can't I just have another multiple EC2 instances to run my workers for computations. (Without using celery or kubernetes).","AnswerCount":2,"Available Count":2,"Score":0.0996679946,"is_accepted":false,"ViewCount":253,"Q_Id":59895455,"Users Score":1,"Answer":"Let's assume you have a number of EC2 instances. How would you manage them from Airflow? How would you distribute the load among those EC2 instances? Celery or Kubernetes take care exactly of these tasks.\nIf, for some reason, you cannot use Celery or Kubernetes, you can install Airflow on a single instance and scale up its resources as needed.","Q_Score":0,"Tags":"python,amazon-ec2,celery,airflow","A_Id":59896068,"CreationDate":"2020-01-24T11:22:00.000","Title":"Apache Airflow without celery or kubernetes","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am using GNU Radio's logging functionality in some custom python blocks I've built for a flowgraph.  Among other things, the logging methods are useful for recording the (rough) start time of the flowgraph to a log file.  I would also like to record the end time of the flowgraph (i.e., the rough time I kill the flowgraph in companion) in a log message written to the log file.  To be clear, I'm looking for a solution that will work when I run the flowgraph from GNU Radio Companion.  Is there an easy way to do this?","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":212,"Q_Id":59901161,"Users Score":1,"Answer":"In GNU Radio blocks, you can overload the stop method to do exactly that, execute code at flow graph stop time.\nGenerally, the \"stop\" button in GRC is a rather hardcore thing; if you instead have a finishing condition in your flowgraph itself (e.g. closing of the window if you're using Qt GUI, or finishing of any block), this could be approached from that logical \"I should be done\" point of view, rather than \"someone else tries to kill me\".","Q_Score":1,"Tags":"python,logging,gnuradio,gnuradio-companion","A_Id":59919568,"CreationDate":"2020-01-24T17:29:00.000","Title":"GNU Radio Companion -- logging a message just prior to flowgraph shutdown","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a device with USB interface which I can connect to both my Ubuntu 18.04 machine and my Windows 10 machine. On Windows 10 I have to install the CP210x driver and manually attach it to the device (otherwise Windows tries to find the device manufacturer's driver - it's a CP210x serial chip), and in Linux write the vendorID and productID to the cp210x driver to allow it to attach to ttyUSB0. This works fine.  \nThe Windows driver is from SiliconLabs - the manufacturer of the UART-USB chip in the device.\nSo on Windows it is attached to COM5 and Linux to ttyUSB0 (Ubuntu, Raspbian)\nUsing Wireshark I can snoop the usb bus successfully on both operating systems.\nThe USB device sends data regularly over the USB bus and on Windows using Wireshark I can see this communication as \"URB_INTERRUPT in\" messages with the final few bytes actually containing the data I require.\nOn Linux it seems that the device connects but using Wireshark this time I can only see URB_BULK packets. Examining the endpoints using pyusb I see that there is no URB_Interrupt endpoint only the URB_Bulk.\nUsing the pyusb libraries on Linux it appears that the only endpoints available are URB_BULK.\nQuestion mainly is how do I tell Linux to get the device to send via the Interrupt transfer mechanism as Windows seems to do.  I don't see a method in pyusb's set_configuration to do this (as no Interrupt transfer endpoints appear) and haven't found anything in the manufacturer's specification.\nFailing that, of course, I could snoop the configuration messages on Windows, but there has to be something I'm missing here?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":288,"Q_Id":59907960,"Users Score":0,"Answer":"Disregard this, the answer was simple in the end: Windows was reassigning the device address on the bus to a different device.","Q_Score":1,"Tags":"python,linux,windows,usb,pyusb","A_Id":60025068,"CreationDate":"2020-01-25T09:25:00.000","Title":"USB Device\/PyUSB on Windows and LInux behaving differently","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm trying to install pyldavis in a conda env using the command conda install -c conda-forge pyldavis but I get the following errors:\nERROR conda.core.link:_execute(700): An error occurred while installing package 'conda-forge::openssl-1.1.1d-hfa6e2cd_0'\n[Errno 13] Permission denied: 'C:\\<Path>\\Library\\bin\\libssl-1_1-x64.dll'","AnswerCount":3,"Available Count":3,"Score":0.0,"is_accepted":false,"ViewCount":1655,"Q_Id":59915357,"Users Score":0,"Answer":"Run as Administrator doesn't work.  I was able to fix it by grabbing the same file from another environment and replacing it (kept a backup though).  Hopefully, there are no unintended consequences.","Q_Score":2,"Tags":"python,installation,conda,libssl,pyldavis","A_Id":67188089,"CreationDate":"2020-01-26T03:36:00.000","Title":"Permession denied error while installing pyldavis in conda env [Errorno 13]","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm trying to install pyldavis in a conda env using the command conda install -c conda-forge pyldavis but I get the following errors:\nERROR conda.core.link:_execute(700): An error occurred while installing package 'conda-forge::openssl-1.1.1d-hfa6e2cd_0'\n[Errno 13] Permission denied: 'C:\\<Path>\\Library\\bin\\libssl-1_1-x64.dll'","AnswerCount":3,"Available Count":3,"Score":0.0,"is_accepted":false,"ViewCount":1655,"Q_Id":59915357,"Users Score":0,"Answer":"I had the same issue installing python-dotenv. Running the command prompt (or in my case, simply running VSCode through which I normally access the terminal) as administrator fixed the issue.","Q_Score":2,"Tags":"python,installation,conda,libssl,pyldavis","A_Id":69333526,"CreationDate":"2020-01-26T03:36:00.000","Title":"Permession denied error while installing pyldavis in conda env [Errorno 13]","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm trying to install pyldavis in a conda env using the command conda install -c conda-forge pyldavis but I get the following errors:\nERROR conda.core.link:_execute(700): An error occurred while installing package 'conda-forge::openssl-1.1.1d-hfa6e2cd_0'\n[Errno 13] Permission denied: 'C:\\<Path>\\Library\\bin\\libssl-1_1-x64.dll'","AnswerCount":3,"Available Count":3,"Score":0.0,"is_accepted":false,"ViewCount":1655,"Q_Id":59915357,"Users Score":0,"Answer":"I had a similar issue when installing the sentence-transformers package with a particular file causing the issue: libssl-1_1-x64.dll\nSimply tracking down the file and deleting it fixed the problem. When I tried again the install worked with no hitches. I suspect the problem came up when the version needed to be downgraded or upgraded from whatever I have in my base or what some other package had installed. It also makes sense that a security related .dll would cause some extra heartburn.\nIn my case it was located at: D:\\installed_software\\anaconda3\\envs\\nlp-intents\\Library\\bin where \"nlp-intents\" is the environment name.","Q_Score":2,"Tags":"python,installation,conda,libssl,pyldavis","A_Id":69692613,"CreationDate":"2020-01-26T03:36:00.000","Title":"Permession denied error while installing pyldavis in conda env [Errorno 13]","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have set up the entire environment to run mininet using an Ubuntu image on VirtualBox. I also found a JSON graph topology which I run with Python to simulate it in mininet (I use PuTTy for remote access from Windows..)\nI read before that using the command sudo mn --controller=none \ncreates a non-SDN simulation. This is not bad for a start, but is there another way of doing that? And if so, how is it possible to remove a specific node and replace it with an SDN switch to test the network performance?\nMany thanks in advance.\nSet up used:\nWindows 10, Oracle VM Virtual Machine, Ubuntu, Mininet, NetworkX, Python, WinTCP..PuTTy..","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":182,"Q_Id":59917211,"Users Score":0,"Answer":"Yes, it is possible. You start a normal SDN network with the desired topology, and you:\n\nset the forwarding-rules on the 'non' SDN-nodes to live forever (so the controller is never asked for new\/expired rules), and\nleave the rest of the node under the control of the controller.","Q_Score":0,"Tags":"python,networking,hybrid,sdn,mininet","A_Id":61058427,"CreationDate":"2020-01-26T09:53:00.000","Title":"Is there a way to create a traditional network with mininet then replace some of its nodes with SDN?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am tring to excetute a GitHub pyton script on my Android smartphon using Termux.\nI knew that this script doesn't run on Python 3.8.1 (which is the default version installed when typed \"pkg install python\" but it runs very well on previous versions of linux. I have to mention that I know this since I was running this script on my laptop and I have different version of python installed.\nHowever, I've looked for a couple of days in a row on google and I didn't find a way to install an older python version on my Termux. Could you please help me out on this?\nThanks in advance,\nLorenzo","AnswerCount":3,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":6696,"Q_Id":59921715,"Users Score":0,"Answer":"pkg i python==[version]\nyou specify the version you want just after the package name. That is\npkg i python==3.6 -y\nconsidering 3.6 is the version then the -y simply means yes","Q_Score":0,"Tags":"python,termux","A_Id":64649042,"CreationDate":"2020-01-26T19:04:00.000","Title":"Install python3.6 on Termux android terminal emulator","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am tring to excetute a GitHub pyton script on my Android smartphon using Termux.\nI knew that this script doesn't run on Python 3.8.1 (which is the default version installed when typed \"pkg install python\" but it runs very well on previous versions of linux. I have to mention that I know this since I was running this script on my laptop and I have different version of python installed.\nHowever, I've looked for a couple of days in a row on google and I didn't find a way to install an older python version on my Termux. Could you please help me out on this?\nThanks in advance,\nLorenzo","AnswerCount":3,"Available Count":2,"Score":-0.0665680765,"is_accepted":false,"ViewCount":6696,"Q_Id":59921715,"Users Score":-1,"Answer":"its actually pkg i python=3.6 and termux don't have that python version","Q_Score":0,"Tags":"python,termux","A_Id":67241693,"CreationDate":"2020-01-26T19:04:00.000","Title":"Install python3.6 on Termux android terminal emulator","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"All the FreeSwitch documentations are given assuming you have installed Debian. So for CentOs or any RHEL distribution users are having a problem.\nWhen I tried to follow the  mod_python documentation given by FreeSwitch, I am getting errors.\nNow, How can I install mod_python or any other modules?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":361,"Q_Id":59928304,"Users Score":0,"Answer":"In CentOs for installing any software, search the yum repo.\nLike here,\nI ran\nyum search freeswitch\nI got all the FreeSwitch modules. Now find your required modules and install.\nLike here for mod_python module, I typed\nyum install freeswitch-python.x86_64\n\nNow, type  cd \/etc\/freeswitch\/autoload_configs\/ and edit modules.conf.xml\nAdd <load module=\"mod_python\"\/> and save the file and exit.\nNow, use fs_cli command and type reloadxml.\nAfter this restart your linux system and again type fs_cli and type module_exists mod_python.\nThis should show true. If so, that means mod_python installation is successful.","Q_Score":0,"Tags":"centos7,python-module,freeswitch","A_Id":59928305,"CreationDate":"2020-01-27T09:33:00.000","Title":"FreeSwitch mod_python(or any other modules) installation on CentOs 7","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a python script that takes some inputs from the user & then executes the code based on the input. The code takes some time to complete; during this code runtime the user can close the terminal(the code is run from a Linux machine)\nAs soon as the user closes the terminal the script stops as well. I know there are options like nohup but it wouldn't accept any input(where input is required in my script).\nHow can I fix this? \nRequirement is -\n\nRun the script, enter the inputs\nLet the code run in the background even if the terminal is closed\nAlso is there a way to write whatever is being printed in the terminal(during the script runtime) to some file","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":356,"Q_Id":59941299,"Users Score":1,"Answer":"Linux's screen tmux served my purpose.","Q_Score":0,"Tags":"python-3.x,nohup","A_Id":59989619,"CreationDate":"2020-01-28T02:06:00.000","Title":"How to run python scipt in the background(after user input) even if the terminal is closed","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I currently have a larger problem at hand so I started by trying to match the smaller differences to see if that'll fix my issue.\nIn my program, I was using a pipe and iterating through that input through sys.stdin. I noticed it's type is <class '_io.TextIOWrapper'>. I'm trying to avoid using a pipe and replaced my code to use subprocess.run() instead and noticed that the result has the type <class 'str'> instead.\nThis could be a really stupid question but I'm wondering why they're different and if I can get the subprocess stdout to be the same type as sys.stdin.\nUsing Python 3.7.5","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":132,"Q_Id":59942154,"Users Score":0,"Answer":"subprocess.run returns a CompletedProcess instance, with the collected stdout\/stderr captured all at once.\nIf you want a stream, create a Popen instance, which will have stdout and stderr attributes that act like sys.stdin, and a stdin attribute that acts like sys.stdout. But beware pipe buffering\/deadlock problems if you do anything fancy.","Q_Score":0,"Tags":"python,types,subprocess,stdout,stdin","A_Id":59942779,"CreationDate":"2020-01-28T04:31:00.000","Title":"Python sys.stdin and subprocess stdout difference","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have two same python file in different location and these scripts will be invoked and executed in random time. If one script is executing, I want other script to wait until that job is finished. How can I get it done?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":148,"Q_Id":59958145,"Users Score":0,"Answer":"you can have a global Flag in somewhere like DB and change your code in a way that script1 only runs when flag is True and script2 only runs when flag is set to false. you should change the value of flag in both scripts.\nOr you can use Trigger. Trigger script2 from script1 after his work is finished.","Q_Score":0,"Tags":"python-3.x,parallel-processing,singleton,semaphore","A_Id":59963099,"CreationDate":"2020-01-28T22:37:00.000","Title":"Avoid duplicate execution of same python script in different location when invoked by cron","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I can't get windows to use python 3 as default. \nI have both versions of python (2.7 & 3.6) installed on my windows 10 pc. I installed python 3 from python.org and ticked the add to PATH box. I've spent a week on and off looking for solutions to getting Bash and Atom to use python 3 as default, including: \n\nchanging the environmental path order, \nreinstalling python3 (so far three times!),\nusing $ python3.6 (or variations of this text I've found online) in git, \nconfiguring atom-python-run to run python3 (this just flashes a python window, nothing further happens),\nBash out put: \n$ python --version\nPython 2.7.17\nI downloaded the ubuntu for windows app. This displays the following: \npython3 --version\nPython 3.6.7. \n\nI'm struggling to come up with other ideas that could work (even with the hours of Googling). If anyone could help I'd be grateful. \nThanks.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":74,"Q_Id":59959573,"Users Score":1,"Answer":"My question is why do you have both versions. Then here is your anwser for your question. You can simply just uninstall 2.7, and use 3.6 for the project. When you need 2.7 just simply reinstall it. \nYou could also try to find a software that will just turn off python 2.7, but sadly I dont know of such software. \nAnother thing is just right your python file, change dir into the project. Then do the command python3 pythonFileName.py in your console, and it would run the project using python3.\nHope this helps! If you have any questions feel free to comment on this anwser.","Q_Score":0,"Tags":"python,python-3.x,windows,bash,atom-editor","A_Id":59959850,"CreationDate":"2020-01-29T01:53:00.000","Title":"Windows using python 2.7 rather than 3.6","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I see that there's a built-in I\/O connector for BigQuery, but a lot of our data is stored in Snowflake. Is there a workaround for connecting to Snowflake? The only thing I can think of doing is to use sqlalchemy to run the query and then dump the output to Cloud Storage Buckets, and then Apache-Beam can get the input data from the files stored in the Bucket.","AnswerCount":3,"Available Count":1,"Score":0.0665680765,"is_accepted":false,"ViewCount":924,"Q_Id":59960706,"Users Score":1,"Answer":"Google Cloud Support here!\nThere's no direct connector from Snowflake to Cloud Dataflow, but one workaround would be what you've mentioned. First dump the output to Cloud Storage, and then connect Cloud Storage to Cloud Dataflow.\nI hope that helps.","Q_Score":3,"Tags":"python,google-cloud-dataflow,pipeline,apache-beam,snowflake-cloud-data-platform","A_Id":59965614,"CreationDate":"2020-01-29T04:59:00.000","Title":"Python: How to Connect to Snowflake Using Apache Beam?","Data Science and Machine Learning":0,"Database and SQL":1,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I've a python application in which I'm using print() method tho show text to a user.  When I interact with this application manually using kubectl exec ... command I can see the output of prints. \nHowever, when script is executed automatically on container startup with CMD python3 \/src\/my_app.py (last entry in Dockerfile) then, the prints are gone (not shown in kubectl logs). Ayn suggestin on how to fix it?","AnswerCount":2,"Available Count":1,"Score":0.2913126125,"is_accepted":false,"ViewCount":2612,"Q_Id":59969871,"Users Score":3,"Answer":"It turned out to be a problem of python environment. Setting, these two environment variables PYTHONUNBUFFERED=1 and PYTHONIOENCODING=UTF-8 fixed the issue.","Q_Score":1,"Tags":"python,docker,kubernetes","A_Id":59969872,"CreationDate":"2020-01-29T15:00:00.000","Title":"Kubernetes log not showing output of python print method","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"We developed web apps in django framework. We have an enterprise Identity Provider which is PingFederate. The main home page (which is different from our site) from chrome browser and edge browser directly recognizes the user and logs them in all the internal websites. We are also on the same network share same domain. We also want to integrate SSO and want to authenticate our users directly with asking password. I researched every where and got to know the authentication is happening by kerbose authentication. Somehow the edge or chrome  is sending some token or id or some TGT ticket to the Identity Provider then they will authenticate and send the username back to the client browser. Can any one please help me how to solve this.\nThanks in advance.","AnswerCount":2,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":774,"Q_Id":59976813,"Users Score":1,"Answer":"It sounds like you want to integrate with the PingFederate solution to use it as the identity provider and allow the users of your web apps to login through SSO. If that is the case, you would need to work with whoever responsible for PingFedereate if it is another team.\nChecklist with the PingFederate Admin\n\nYou would need to know if you need to choose the directory will be used to log the users in. \nWhich user attributes you would need to get back in the SAML response.\nWill you sign the SAML request using your app or not.\nWill you start the SSO cycle from your app, which I believe you would, and you will be using SP initiated in this case. \n\nOtherwise, it will be the other way around and will be using IDP Initiated. \n\nSP Initiated - User will call the app URL first and then redirected\nto Ping URL and be sent back to the app.\nIDP Initiated - User will call PingFederate URL and will be sent to the app after authentication. \n\nI will list the steps in here in case it is your team who is also responsible for PingFederate solution:\n\nChanges in PingFederate as SP (service provider) connection\n\nCreate a new IDP (Identity Provider) Adapter for the login page if needed.\n\n\nIDP adapter will be using a Password Credential Validator to do the authentication and also has the configuration for which HTML pages to present to the user. \nCreate the SP connection in Ping with the stuff in the check list.\n\n\nThe connection here will use the adapter in the step above to present the login page\nThen check the user credentials and establish the SSO session if successful.\nAssemble the SAML response with all the required attributes.\nSign the response and send it to the application endpoint configured inside the connection.\n\n\n\nChanges in the web app as the service provider for the user\n\nThe application will need to send the SAML request to the endpoint of the new connection in Ping.\nWait for the response on the dedicated endpoint.\nVerify the SAML response signature using the PingFederate server's public key.\nCreate the local app session and move on.\n\n\nIf you will be using OpenToken, this will change to have another interaction of Adapter-to-Adapter. Just reply with that if this is the case.","Q_Score":0,"Tags":"python,django,saml-2.0,pingfederate","A_Id":60384457,"CreationDate":"2020-01-29T22:56:00.000","Title":"Integrate Django authentication with Enterprise Identity Provider PingFederate","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"In my Python 3 script I am starting another program that normally prints out what its doing as its doing if I don't capture the output with PIPE such as below:\nproc = subprocess.run(\"program\")\nBut when I do capture the output for saving to a text file with:\nproc = subprocess.run(\"program\", stdout=subprocess.PIPE, stderr=subprocess.STDOUT)\nit no longer prints out as the subprocess is running but does capture the output for saving to a text file. Is there a way to have the program print to the screen and capture that output. I have read through subprocess but I cannot figure out a way to do so.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":216,"Q_Id":59985818,"Users Score":2,"Answer":"Is there a way to have the program print to the screen and capture that output.\n\nCapture it and print it yourself.\nIf you want to print the output as it's going, use subprocess.Popen, then stdout and stderr will be streams, you can read their content in a loop and print that as it gets output (though beware that the process's stdout will most likely be fully buffered while stderr is unbuffered).","Q_Score":2,"Tags":"python,subprocess","A_Id":59986087,"CreationDate":"2020-01-30T12:14:00.000","Title":"How to use subprocess to capture output & allow for the output to print to screen?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I should do it wiht only import os\nI have problem, that i don't know how to make program after checking the specific folder for folders to do the same for folders in these folders and so on.","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":33,"Q_Id":59991335,"Users Score":0,"Answer":"You can use os.walk(directory)","Q_Score":1,"Tags":"python,printing,directory,subdirectory,names","A_Id":59991437,"CreationDate":"2020-01-30T17:22:00.000","Title":"Program to print all folder and subfolder names in specific folder","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"So I have gone into the cmd and found where my file I want to run is located. It is called 3.py and my teacher had told us just to write \"python 3.py\" to run it. I did this and it doesn't say that there is anything wrong, it just does nothing. Almost like there is nothing to be read in the file 3.py. But I open it just to make sure I'm not just trying to run an empty file. My file has something simple in it like print(\"Hello there, this program is working\") so I know it isn't not running because of an error in the code.\nI am using spider from anaconda to write my code into.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":22,"Q_Id":59996419,"Users Score":0,"Answer":"I have found out how to do it now. You have to use Anaconda prompt rather than cmd.","Q_Score":0,"Tags":"python","A_Id":60008204,"CreationDate":"2020-01-31T00:23:00.000","Title":"How do I use the cmd to run a python program written in Spider","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am on OS Mojave and just used homebrew to install geos and proj and python3 disappeared. I had two versions and now I only have the 2.7 version. I did brew install python3 and it says its already installed but not linked, I then did brew link python as it suggested but it returned an Error: Could not symlink Frameworks\/Python.framework\/Headers Target \/usr\/local\/Frameworks\/Python.framework\/Headers is a symlink belonging to python@2.. \nHow can I go back to having both versions?. I am not 100% installing geos and proj was what caused it but I used python3 3 days ago.  I have also installed phantomjs via homebrew since the last time I used python3.\nI need to have both versions of python installed. What would be the appropriate way of handling this since I seem to have all the files still on my computer?\nThanks in advance!","AnswerCount":3,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":1488,"Q_Id":60014044,"Users Score":0,"Answer":"Install Virtual Environment so you can use many and different versions of Python.","Q_Score":1,"Tags":"python,homebrew","A_Id":60014116,"CreationDate":"2020-02-01T04:39:00.000","Title":"Python 3 disappeared from computer - MacOS","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I am on OS Mojave and just used homebrew to install geos and proj and python3 disappeared. I had two versions and now I only have the 2.7 version. I did brew install python3 and it says its already installed but not linked, I then did brew link python as it suggested but it returned an Error: Could not symlink Frameworks\/Python.framework\/Headers Target \/usr\/local\/Frameworks\/Python.framework\/Headers is a symlink belonging to python@2.. \nHow can I go back to having both versions?. I am not 100% installing geos and proj was what caused it but I used python3 3 days ago.  I have also installed phantomjs via homebrew since the last time I used python3.\nI need to have both versions of python installed. What would be the appropriate way of handling this since I seem to have all the files still on my computer?\nThanks in advance!","AnswerCount":3,"Available Count":2,"Score":0.0665680765,"is_accepted":false,"ViewCount":1488,"Q_Id":60014044,"Users Score":1,"Answer":"use anaconda python distribution which better for python.","Q_Score":1,"Tags":"python,homebrew","A_Id":60014185,"CreationDate":"2020-02-01T04:39:00.000","Title":"Python 3 disappeared from computer - MacOS","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I have just installed python3.8 and sublime text editor. I am attempting to run the python build on sublime text but I am met with \"Python was not found but can be installed\" error.\nBoth python and sublime are installed on E:\\\nWhen opening cmd prompt I can change dir and am able to run py from there without an issue.\nI'm assuming that my sublime is not pointing to the correct dir but don't know how to resolve this issue.","AnswerCount":2,"Available Count":1,"Score":-0.1973753202,"is_accepted":false,"ViewCount":5706,"Q_Id":60066455,"Users Score":-2,"Answer":"i had the same problem, so i went to the microsoft store (windos 10) and simply installed \"python 3.9\" and problem was gone!\nsorry for bad english btw","Q_Score":0,"Tags":"python-3.x,sublimetext","A_Id":65723885,"CreationDate":"2020-02-04T22:26:00.000","Title":"Python was not found but can be installed","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm trying to install eel library for python and I keep getting this message. I have tried upgrading pip but still no luck please help using windows 10, python 3.8 on visualstudio.\n\ndistutils.errors.DistutilsError: Command '['c:\\program files\n  (x86)\\python38-32\\python.exe', '-m', 'pip',\n  '--disable-pip-version-check', 'wheel', '--no-deps', '-w',\n  'C:\\Users\\inamu\\AppData\\Local\\Temp\\tmpp16m1lcg', '--quiet',\n  'pycparser']' returned non-zero exit status 1.\n      ---------------------------------------- ERROR: Command errored out with exit status 1: python setup.py egg_info Check the logs for\n  full command output.","AnswerCount":2,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":1368,"Q_Id":60067549,"Users Score":1,"Answer":"I had the same problem and I'm guessing it has to do with gevent, which was the case for me. To solve it I did \"pip install gevent==1.5a3\"\nIf this doesn't fix it then I would try to troubleshoot which individual library is causing this issue then install a different release version using the library name then ==library update","Q_Score":1,"Tags":"python,pip,eel","A_Id":60101876,"CreationDate":"2020-02-05T00:45:00.000","Title":"not able to pip install eel . - Command errored out with exit status 1: python setup.py egg_info Check the logs for full command output","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a python file that takes an image and a pdf as input, computes and prints the Levenshtein distance between the OCR and data extracted from pdf. \nThe image name and pdf name are as follows -\nImage - 'foo_1.png', 'foo_2.png', etc. (One png per page of pdf)\npdf - 'foo.pdf'  \nDirectory structure\nDir\n|\n|__ Images\n |\n |__ foo_1.png\n |__ foo_2.png\n|\n|__ Documents\n |\n |__ foo.pdf\n|\n|__myScript.py  \nI call the script from terminal like ~\/Dir$ python myScript.py foo\nThe files 'foo_1.png', 'foo_2.png' and 'foo.pdf' are called, processed and the result is printed as follows.  \nCurrent output in terminal -  \n\nfield1 -\n  L Dist - 61 L Ratio - 0.47\n  field2 -\n  L Dist - 54 L Ratio - 0.37\n\nIs there a way to call the script from terminal to process several such files in a directory?\nExpected output in terminal -  \n\nfield1 -\n  L Dist - 61 L Ratio - 0.47\n  field2 -\n  L Dist - 54 L Ratio - 0.37\nfield1 -\n  L Dist - 30 L Ratio - 0.07\n  field2 -\n  L Dist - 84 L Ratio - 0.87\n\nI already have python script to achieve the batch processing. I wanted to know if there is a way to achieve this from terminal by calling only to the 'myScript.py'.\nThanks!","AnswerCount":2,"Available Count":1,"Score":-0.1973753202,"is_accepted":false,"ViewCount":90,"Q_Id":60069462,"Users Score":-2,"Answer":"First download the python package with its help we can execute the task.\nafter downloading launch the application and in terminal open the python normal and text file to check whether the specified file available or not.\nafter that provide full path of text file and press enter it executed successfully.","Q_Score":0,"Tags":"python,bash,terminal,batch-processing","A_Id":60069615,"CreationDate":"2020-02-05T05:24:00.000","Title":"How to process multiple files using a python script 'from the terminal' and not using another script or loops?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I want to modify files inside docker container with PyCharm. Is there possibility of doing such thing?","AnswerCount":2,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":723,"Q_Id":60096680,"Users Score":1,"Answer":"Yes. There are multiple ways to do this, and you will need to have PyCharm installed inside the container.\nFollowing set of instructions should work -\n\ndocker ps - This will show you details of running containers\ndocker exec -it *<name of container>* \/bin\/bash\n\nAt this point you will oh shell inside the container. If PyCharm is not installed, you will need to install. Following should work -\nsudo apt-get install pycharm-community\nGood to go!\nNote: The installation is not persistence across Docker image builds. You should add the installation step of PyCharm on DockerFile if you need to access it regularly.","Q_Score":3,"Tags":"python,docker,pycharm","A_Id":60097118,"CreationDate":"2020-02-06T13:59:00.000","Title":"Is there a way to modify files inside docker via PyCharm?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have some python code that I wrote and have just installed vscode and starting to work with it.\nthe code is in home\/user\/code\/dlS3BMC folder which has a env folder with my virtual environment.\nI am using Linux Mint 19.3 Tricia cinnamon desktop, vscode 1.41.1\nI open this folder in vscode.  ctrl+ shft+p and I see my virtual environment, I select it, but when I do which python in the terminal window it is still pointing to the system python \/usr\/bin\/python\nIf I . env\/bin\/activate in the terminal everything works fine - I don't mind doing that but it would be nice if I didn't have to.\nFrom the microsoft docs I think it is supposed to automatically activate the env, but it does not.  I have tried saving project after I activate, but when I close and open again, it is not activated.  Sorry I am very new to vscode at this stage and have just used sublime text editor to write my python code in the past.\nThanks\nBill","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":937,"Q_Id":60101325,"Users Score":0,"Answer":"ok, it seems it does not activate the virtual environment until you run the code either debug or simply run... when you run the code, I can see it activate the env.  \nTIL this.\nRegards\nBill","Q_Score":1,"Tags":"python,visual-studio-code,python-venv","A_Id":60102510,"CreationDate":"2020-02-06T18:23:00.000","Title":"vscode doesn't seem to activate my virtual python environment","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"PC features:\nOS: Debian 10 x64\nProcessor: AMD Ryzen 7 2700x\nmotherboard: Rogstrix b450-f\nRam: 16gb \nGPU: ZotaGaming 2070 super.\nI try to run a program,ANFIS whit data set IRIS.\nbut from one moment to another, the processor stops or something similar, also the peripherals stop working, and the ram warning LED turns on.\nI don't understand why, since in Windows this doesn't happen to me. At first I thought it was because run on anaconda virtual environment in Windows, however in Linux even with Dockers, the same problem still occurs to me.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":22,"Q_Id":60123514,"Users Score":0,"Answer":"The problem was in the processor voltage, the configuration of the bios. Change 0.02v to 0.01v,In offset mode. \nIf you keep crashing, Reduce the chipset clock frequency","Q_Score":0,"Tags":"python,process,linux-kernel,out-of-memory,ram","A_Id":60123585,"CreationDate":"2020-02-08T02:52:00.000","Title":"Why a python process in linux shuttdown my Pc and not in Windows?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm trying to create Skype patcher with replaced font (stock is incorrectly displaying japanese kanji as chinese equivalent) for Windows. Maybe Python is not the best options, but current problem is not related with Python itself: asar utility produces output with readonly permissions, and changing permission attempt can't do anything. But, maybe, os.chmod is just not working on Windows?\n\n\nimport tkinter as tk\nfrom tkinter import filedialog\nimport subprocess\nimport os\nimport shutil\n\n\ndef change_permissions_recursive(path, mode):\n    for root, dirs, files in os.walk(path, topdown=False):\n        for dir in [os.path.join(root,d) for d in dirs]:\n            os.chmod(dir, mode)\n    for file in [os.path.join(root, f) for f in files]:\n            os.chmod(file, mode)\n\n\nroot = tk.Tk()\nroot.withdraw()\ndir_path = filedialog.askdirectory(initialdir=\"C:\\Program Files (x86)\\Microsoft\\Skype for Desktop\")\ncmd = \"asar.cmd extract \\\"\" + dir_path + \"\/resources\/app.asar\\\" tmp\/app\"\nprocess = subprocess.Popen(cmd, stdout=subprocess.PIPE, creationflags=0x08000000, cwd=\"utils\")\nprocess.wait()\nchange_permissions_recursive(\"utils\/tmp\/app\/fonts\", 0o777)\nshutil.copyfile(\"utils\/meiryo.ttf\", \"utils\/tmp\/app\/fonts\")","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":487,"Q_Id":60139536,"Users Score":0,"Answer":"Something wrong with shutil.copy itself: when rewrite same logic with powershell, all works as expected","Q_Score":0,"Tags":"python,file-permissions","A_Id":60140996,"CreationDate":"2020-02-09T17:48:00.000","Title":"Python chmod for windows","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":1,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am creating a file input.txt to store my input and while running my py script file from cmd. I want it to take input from that file, just like we can do something like that in c++.\na.exe < input.txt\nHow can we do something similar in python?","AnswerCount":6,"Available Count":1,"Score":0.0665680765,"is_accepted":false,"ViewCount":1309,"Q_Id":60140166,"Users Score":2,"Answer":"Python works the same way. a.py < input.txt and python a.py < input.txt both work. You can read the file with sys.stdin or the input() function.","Q_Score":1,"Tags":"python","A_Id":60140205,"CreationDate":"2020-02-09T18:54:00.000","Title":"Provide stdin input from file in cmd?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I just installed ubuntu 18.04 and I really don't know how does everything work yet. I use the last version of python in my windows system (3.8.1) and would like to use that version as well in ubuntu, but the \"pre-installed\" version of python is 2.7. Is there a way to uninstall that old version of python instead of changin the alias of the python command to match the version I want to use? Can you do that or does ubuntu need to have that version? If you could help me or explain this to me I would appreciate it.","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":1368,"Q_Id":60141248,"Users Score":0,"Answer":"Some services and application in Ubuntu use Python 2.x to run. It is not advisable to remove it. Rather, virtual environments maybe a good practice. There, you can work on Python 3.x, as per your needs, without messing up with the system's dependencies.","Q_Score":0,"Tags":"python,linux,ubuntu,version","A_Id":60146024,"CreationDate":"2020-02-09T20:57:00.000","Title":"Change default version of python in ubuntu 18.04","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am an absolute beginner in AWS: I have created a key and an instance, the python script I want to run in the EC2 environment needs to loop through around 80,000 filings, tokenize the sentences in them, and use these sentences for some unsupervised learning. \nThis might be a duplicate; but I can't find a way to copy these filings to the EC2 environment and run the python script in EC2, I am also not very sure as to how I can use boto3. I am using Mac OS.  I am just looking for any way to speed things up. Thank you so so much! I am forever grateful!!!","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":136,"Q_Id":60158883,"Users Score":0,"Answer":"Here's one way that might help:\n\ncreate a simple IAM role that allows S3 access to the bucket holding your files\napply that IAM role to the running EC2 instance (or launch a new instance with the IAM role)\ninstall the awscli on the EC2 instance\nSSH to the instance and sync the S3 files to the EC2 instance using aws s3 sync\nrun your app\n\nI'm assuming you've launched EC2 with enough diskspace to hold the files.","Q_Score":0,"Tags":"python,amazon-web-services,machine-learning,amazon-ec2,boto3","A_Id":60159170,"CreationDate":"2020-02-10T21:41:00.000","Title":"Run Python Script on AWS and transfer 5GB of files to EC2","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am an absolute beginner in AWS: I have created a key and an instance, the python script I want to run in the EC2 environment needs to loop through around 80,000 filings, tokenize the sentences in them, and use these sentences for some unsupervised learning. \nThis might be a duplicate; but I can't find a way to copy these filings to the EC2 environment and run the python script in EC2, I am also not very sure as to how I can use boto3. I am using Mac OS.  I am just looking for any way to speed things up. Thank you so so much! I am forever grateful!!!","AnswerCount":2,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":136,"Q_Id":60158883,"Users Score":0,"Answer":"Here's what I tried recently:\n\nCreate the bucket and keep the bucket accessible for public.\nCreate the role and add HTTP option.\nUpload all the files and make sure the files are public accessible.\nGet the HTTP link of the S3 file.\nConnect the instance through putty.\nwget  copies the file into EC2\ninstance.\n\nIf your files are in zip format, one time copy enough to move all the files into instance.","Q_Score":0,"Tags":"python,amazon-web-services,machine-learning,amazon-ec2,boto3","A_Id":60161528,"CreationDate":"2020-02-10T21:41:00.000","Title":"Run Python Script on AWS and transfer 5GB of files to EC2","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have project on Google Cloud App Engine. I have set up a cloud Scheduler to make a GET request every 24 hours to a certain endpoint on the app engine which invokes a simple Python script. The script simply reads a Google Sheet and updates the Cloud Firestore with the data from the sheet. It was working perfectly but for the past couple of days it fails to update the Database on scheduled time and gives an error. But when I trigger it manually from the console it works just fine. So that means the problem is not with my script. Can anyone have an idea what could be causing the problem?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":105,"Q_Id":60164299,"Users Score":0,"Answer":"I don't think there is enough information in your question, but I think you should analyze logs. In Cloud Scheduler\/ Jobs you can find column \"Logs\" which contain links for every job. You can access Stockdriver Logging for this particular job directly from there.\nI hope this will help!","Q_Score":0,"Tags":"python,gcloud,google-cloud-scheduler","A_Id":60206867,"CreationDate":"2020-02-11T07:59:00.000","Title":"A Python function being triggered by Google Cloud Scheduler fails to work on scheduled time but executes perfectly fine when I run it manually","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"If I type in which python I get: \/home\/USER\/anaconda3\/bin\/python\nIf I type in echo $PYTHONPATH I get: \/home\/USER\/terrain_planning\/devel\/lib\/python2.7\/dist-packages:\/opt\/ros\/melodic\/lib\/python2.7\/dist-packages\nShould that not be the same? And is it not better to set it: usr\/lib\/python\/\nHow would I do that? Add it to the PYTHONPATH or set the PYTHONPATH to that? But how to set which python?","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":1577,"Q_Id":60164658,"Users Score":4,"Answer":"You're mixing 2 environment variables:\n\nPATH where which looks up for executables when they're accessed by name only. This variable is a list (colon\/semi-colon separated depending on the platform) of directories containing executables. Not python specific. which python just looks in this variable and prints the full path\nPYTHONPATH is python-specific list of directories (colon\/semi-colon separated like PATH) where python looks for packages that aren't installed directly in the python distribution. The name & format is very close to system\/shell PATH variable on purpose, but it's not used by the operating system at all, just by python.","Q_Score":6,"Tags":"python,linux,python-requests,environment,pythonpath","A_Id":60165035,"CreationDate":"2020-02-11T08:29:00.000","Title":"which python vs PYTHONPATH","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have multiple Producers which are feeding data into Kafka. I wish to run a Consumer every hour to get all the accumulated data in at once and process it further.\n\nThe options which I thought of are:\n\nUse a python thread and use an equivalent of setInterval to call a Consumer\nSetting the max_poll_interval_ms variable: (as mentioned in a few other answers). However, the official document states \n\n\nThis places an upper bound on the amount of time that the consumer can\n  be idle before fetching more records. If poll() is not called before\n  expiration of this timeout, then the consumer is considered failed and\n  the group will rebalance\n   This does not sound like that it's responsible for putting a consumer to sleep and then firing it again.\n\n\nInstead of polling every hour, I track the Consumer Offset and poll after 10,000 records have been appended to Kafka\n\nHowever, I want to manage the same within the Consumer itself. What is the best way of the same\n?","AnswerCount":2,"Available Count":2,"Score":0.0996679946,"is_accepted":false,"ViewCount":1746,"Q_Id":60169515,"Users Score":1,"Answer":"Use Cron or your OS scheduler to call a script every hour.\nIf you need to wait until 10k records are on the topic to do anything useful, then I'm not entirely sure Kafka is a good fit in that architecture. Plus, the consumer lag would practically, constantly be falling behind","Q_Score":4,"Tags":"apache-kafka,kafka-consumer-api,polling,kafka-python","A_Id":60170414,"CreationDate":"2020-02-11T13:04:00.000","Title":"What is the best way of polling at regular intervals a Kafka Consumer while using kafka-python?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have multiple Producers which are feeding data into Kafka. I wish to run a Consumer every hour to get all the accumulated data in at once and process it further.\n\nThe options which I thought of are:\n\nUse a python thread and use an equivalent of setInterval to call a Consumer\nSetting the max_poll_interval_ms variable: (as mentioned in a few other answers). However, the official document states \n\n\nThis places an upper bound on the amount of time that the consumer can\n  be idle before fetching more records. If poll() is not called before\n  expiration of this timeout, then the consumer is considered failed and\n  the group will rebalance\n   This does not sound like that it's responsible for putting a consumer to sleep and then firing it again.\n\n\nInstead of polling every hour, I track the Consumer Offset and poll after 10,000 records have been appended to Kafka\n\nHowever, I want to manage the same within the Consumer itself. What is the best way of the same\n?","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":1746,"Q_Id":60169515,"Users Score":0,"Answer":"If you read the official document for max_poll_interval_ms, it is an maximum interval for which the consumer can be idle. After that the consumer is considered as dead and consumer group rebalance occurs.\nThis is why I would advise that you shouldn't close consumer after 10k. Even though using offset for polling is a good strategy, there is a problem with that. Every new consumer offset doesn't mean it is a new message. Depending on your auto.offset.reset config you might be having duplicate messages.\nTo save costs of running pod, I would suggest that you should create a topic with less partitions. This might save you on data transfer + storage cost. Although the instance should be kept running.","Q_Score":4,"Tags":"apache-kafka,kafka-consumer-api,polling,kafka-python","A_Id":60192911,"CreationDate":"2020-02-11T13:04:00.000","Title":"What is the best way of polling at regular intervals a Kafka Consumer while using kafka-python?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am learning and building a Python application within a docker container.  My editor is visual studio code.  Whilst learning, I like to click around to see what other code is doing, to help understand it best, but am unsure the best process whilst working with Python.\nFor example, I am importing the 'os' library, but in that library there are lots of capabilities, and it would be good to be able to delve in and see what they are.\nAny process recommendations would be greatly appreciated to help with my learning here.\nThanks,\nDan","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":29,"Q_Id":60173994,"Users Score":0,"Answer":"To help clarify the solution from the comments above, this is what I needed to do to get intellisense working for me in the way I needed.\n\nEnsure your host machine has all the modules\/libraries installed you are going to do (this is on top of your docker container having them, as VS Code cannot see them).  To do this on the site I am working on was python3 -m pip install -r requirements.txt.\n\nNote: This did come up with some bugs, but a quick google helped with these, and were generally around installing python3.6-dev and libmysqlclient-dev.\n\nEnsure VS Code is pointing to the python version you are using (for example, I set mine to python3.6).  This can be done in the bottom-left menu options\n\nOnce these steps are done, you should be able to hover over all imports and classes to get some info, and also ctrl+click will take you into the code to look around it.","Q_Score":0,"Tags":"python,visual-studio","A_Id":60186795,"CreationDate":"2020-02-11T17:04:00.000","Title":"How to view code from 'import' easily (eg. Django code) in visual studio","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":1},{"Question":"I am trying to install Anaconda3-2019.10-Windows-x86_64.exe on window 8.1. During installation, I checked details and there seemed have many issues. \n\nNo Scripts folder or Conda Command prompt or shortcuts were created.\nOnly conda-meta, Lib, pkgs,_conda.exe and Uninstall-Anaconda3.exe are created.\n\nI tried 32 bits also and miniconda versions. All of them don't work for me. I already tried multiple uninstallation and installation. But the result is the same.\nany inputs will be very helpful.\n\nExtract: anaconda-2019.10-py37_0.tar.bz2 [7424] Failed to execute\n  script conda.exe\nTraceback (most recent call last):   File\n  \"site-packages\\PyInstaller\\loader\\pyiboot01_bootstrap.py\", line 149,\n  in init   File \"ctypes__init__.py\", line 348, in init\n  OSError: [WinError 126] The specified module could not be found\nDuring handling of the above exception, another exception occurred:\nTraceback (most recent call last):   File \"conda.exe.py\", line 45, in\n  \nFile \"site-packages\\PyInstaller\\loader\\pyiboot01_bootstrap.py\", line\n  151, in init\nmain.PyInstallerImportError: Failed to load dynlib\/dll 'C:\\Users\\USERNAME\\AppData\\Local\\Temp\\_MEI77242\\archive.dll'.\n  Most probably this dynlib\/dll was not found when the application was\n  frozen.\nTraceback (most recent call last):   File\n  \"site-packages\\PyInstaller\\loader\\pyiboot01_bootstrap.py\", line 149,\n  in init   File \"ctypes__init__.py\", line 348, in init\n  OSError: [WinError 126] The specified module could not be found","AnswerCount":5,"Available Count":3,"Score":0.0798297691,"is_accepted":false,"ViewCount":4976,"Q_Id":60183699,"Users Score":2,"Answer":"For me, it's the opposite. When i used the installers from 2020, Anaconda is installed in C:\\Users\\username\\Anaconda3. This gives me the same problem as you with no Scripts folder, no command prompt, no Anaconda Navigator. I tried the 2019 version and now Anaconda is installed in C:\\Users\\username\\AppData\\Local\\Continuum\\anaconda3 and it works.\nMaybe changing the install path for the 2020 versions would have worked too. I didnt try it though. I have Windows 10 and used the x86_64 files.","Q_Score":3,"Tags":"python,anaconda","A_Id":65795041,"CreationDate":"2020-02-12T08:05:00.000","Title":"Anaconda 3 installation error - no scripts folder and no conda command prompt and shortcuts","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to install Anaconda3-2019.10-Windows-x86_64.exe on window 8.1. During installation, I checked details and there seemed have many issues. \n\nNo Scripts folder or Conda Command prompt or shortcuts were created.\nOnly conda-meta, Lib, pkgs,_conda.exe and Uninstall-Anaconda3.exe are created.\n\nI tried 32 bits also and miniconda versions. All of them don't work for me. I already tried multiple uninstallation and installation. But the result is the same.\nany inputs will be very helpful.\n\nExtract: anaconda-2019.10-py37_0.tar.bz2 [7424] Failed to execute\n  script conda.exe\nTraceback (most recent call last):   File\n  \"site-packages\\PyInstaller\\loader\\pyiboot01_bootstrap.py\", line 149,\n  in init   File \"ctypes__init__.py\", line 348, in init\n  OSError: [WinError 126] The specified module could not be found\nDuring handling of the above exception, another exception occurred:\nTraceback (most recent call last):   File \"conda.exe.py\", line 45, in\n  \nFile \"site-packages\\PyInstaller\\loader\\pyiboot01_bootstrap.py\", line\n  151, in init\nmain.PyInstallerImportError: Failed to load dynlib\/dll 'C:\\Users\\USERNAME\\AppData\\Local\\Temp\\_MEI77242\\archive.dll'.\n  Most probably this dynlib\/dll was not found when the application was\n  frozen.\nTraceback (most recent call last):   File\n  \"site-packages\\PyInstaller\\loader\\pyiboot01_bootstrap.py\", line 149,\n  in init   File \"ctypes__init__.py\", line 348, in init\n  OSError: [WinError 126] The specified module could not be found","AnswerCount":5,"Available Count":3,"Score":0.0,"is_accepted":false,"ViewCount":4976,"Q_Id":60183699,"Users Score":0,"Answer":"This problem still exists in  Anaconda3 2021.11. I suspect the problem is in the username (might be that this occurs only with certain localizations). If the username has special characters or space the AppData\/Local\/Continuum folder will simply be missing. What is unacceptable is the installer telling the installation was a success.\nIf you install it globally you will still not be able to use it when you create a new enviroment (It tries to put it in the user folder, succeeds, then doesn't find anything when eg. you try to install new packages to this env). (This might be dependent on other localization settings too)\nSolution is to create a simple user folder like instead of Kov\u00e1cs Xavi\u00e9r make it KovacsXavier (I'm sure the Caps doesn't bother it). Now you will be able to install it.\nIf you have a new windows installation you can trick windows into creating such a short username by adding this as your \"UserName\" first and later renaming yourself. The directory created will remain the same but you can rename your displayed name later. I really doesn't recommend anyone letting Windows create a fancy named home folder. Not anaconda is the only software that has problems with this.\nAnother notable observation that you better leash your antivirus software when installing Anaconda.\nBut it is obvious Anaconda doesn't check software integrity after install. Which is sad.","Q_Score":3,"Tags":"python,anaconda","A_Id":70756149,"CreationDate":"2020-02-12T08:05:00.000","Title":"Anaconda 3 installation error - no scripts folder and no conda command prompt and shortcuts","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to install Anaconda3-2019.10-Windows-x86_64.exe on window 8.1. During installation, I checked details and there seemed have many issues. \n\nNo Scripts folder or Conda Command prompt or shortcuts were created.\nOnly conda-meta, Lib, pkgs,_conda.exe and Uninstall-Anaconda3.exe are created.\n\nI tried 32 bits also and miniconda versions. All of them don't work for me. I already tried multiple uninstallation and installation. But the result is the same.\nany inputs will be very helpful.\n\nExtract: anaconda-2019.10-py37_0.tar.bz2 [7424] Failed to execute\n  script conda.exe\nTraceback (most recent call last):   File\n  \"site-packages\\PyInstaller\\loader\\pyiboot01_bootstrap.py\", line 149,\n  in init   File \"ctypes__init__.py\", line 348, in init\n  OSError: [WinError 126] The specified module could not be found\nDuring handling of the above exception, another exception occurred:\nTraceback (most recent call last):   File \"conda.exe.py\", line 45, in\n  \nFile \"site-packages\\PyInstaller\\loader\\pyiboot01_bootstrap.py\", line\n  151, in init\nmain.PyInstallerImportError: Failed to load dynlib\/dll 'C:\\Users\\USERNAME\\AppData\\Local\\Temp\\_MEI77242\\archive.dll'.\n  Most probably this dynlib\/dll was not found when the application was\n  frozen.\nTraceback (most recent call last):   File\n  \"site-packages\\PyInstaller\\loader\\pyiboot01_bootstrap.py\", line 149,\n  in init   File \"ctypes__init__.py\", line 348, in init\n  OSError: [WinError 126] The specified module could not be found","AnswerCount":5,"Available Count":3,"Score":0.0,"is_accepted":false,"ViewCount":4976,"Q_Id":60183699,"Users Score":0,"Answer":"Global search for the file .condarc in the drive you installed in. Uninstall anaconda and delete .condarc file. Reinstall Anaconda and you should be good to go. Was stuck with this problem for hours, hope this helps!","Q_Score":3,"Tags":"python,anaconda","A_Id":71327656,"CreationDate":"2020-02-12T08:05:00.000","Title":"Anaconda 3 installation error - no scripts folder and no conda command prompt and shortcuts","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"My distributed application consists of many producers that push tasks into several FIFO queues, and multiple consumers for every one of these queues. All these components live on a single node, so no networking involved.\nThis pattern is perfectly supported by Python's built-in multiprocessing.Queue, however when I am scaling up my application the queue implementation seems to be a bottleneck. I am not sending large amounts of data, so memory sharing does not solve the problem. What I need is fast guaranteed delivery of 10^4-10^5 small messages per second. Each message is about 100 bytes.\nI am new to the world of fast distributed computing and I am very confused by the sheer amount of options. There is RabbitMQ, Redis, Kafka, etc.\nZeroMQ is a more focused and compact alternative, which also has successors such as nanomsg and nng. Also, implementing something like a many-to-many queue with a guaranteed delivery seems nontrivial without a broker.\nI would really appreciate if someone could point me to a \"standard\" way of doing something like this with one of the faster frameworks.","AnswerCount":3,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":1950,"Q_Id":60197392,"Users Score":4,"Answer":"I think that a lot of it depends partly on what sort of importance you place on individual messages. \nIf each and every one is vital, and you have to consider what happens to them in the event of some failure somewhere, then frameworks like RabbitMQ can be useful. RabbitMQ has a broker, and it's possible to configure this for some sort of high availability, high reliability mode. With the right queue settings, RabbitMQ will look after your messages up until some part of your system consumes them.\nTo do all this, RabbitMQ needs a broker. This makes it fairly slow. Though at one point there was talk about reimplementing RabbitMQ on top of ZeroMQ's underlying protocols (zmtp) and doing away with the broker, implementing all the functionality in the endpoints instead.\nIn contrast, ZeroMQ does far less to guarantee that, in the event of failures, your messages will actually, eventually, get through to the intended destination. If a process dies, or a network connection fails, then there's a high chance that messages have got lost. More recent versions can be set up to actively monitor connections, so that if a network cable breaks or a process dies somewhere, the endpoints at the other end of the sockets can be informed about this pretty quickly. If one then implements a communicating sequential processes framework on top of ZMQ's actor framework (think: message acknowledgements, etc. This will slow it down) you can end up with a system whereby endpoints can know for sure that messages have been transfered to intended destinations.\nBeing brokerless allows zmq to be pretty fast. And it's efficient across a number of different transports, ranging from inproc to tcp, all of which can be blended together. If you're not worried about processes crashing or network connections failing, ZMQ gives you a guarantee to deliver messages right out of the box.\nSo, deciding what it is that's important in your application helps choose what technology you're doing to use as part of it - RabbitMQ, ZeroMQ, etc. Once you've decided that, then the problem of \"how to get the patterns I need\" is reduced to \"what patterns does that technology support\". RabbitMQ is, AFAIK, purely pub\/sub (there can be a lot of each), whereas ZeroMQ has many more.","Q_Score":5,"Tags":"python,message-queue,zeromq","A_Id":60247531,"CreationDate":"2020-02-12T21:49:00.000","Title":"High-performance replacement for multiprocessing.Queue","Data Science and Machine Learning":1,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"My distributed application consists of many producers that push tasks into several FIFO queues, and multiple consumers for every one of these queues. All these components live on a single node, so no networking involved.\nThis pattern is perfectly supported by Python's built-in multiprocessing.Queue, however when I am scaling up my application the queue implementation seems to be a bottleneck. I am not sending large amounts of data, so memory sharing does not solve the problem. What I need is fast guaranteed delivery of 10^4-10^5 small messages per second. Each message is about 100 bytes.\nI am new to the world of fast distributed computing and I am very confused by the sheer amount of options. There is RabbitMQ, Redis, Kafka, etc.\nZeroMQ is a more focused and compact alternative, which also has successors such as nanomsg and nng. Also, implementing something like a many-to-many queue with a guaranteed delivery seems nontrivial without a broker.\nI would really appreciate if someone could point me to a \"standard\" way of doing something like this with one of the faster frameworks.","AnswerCount":3,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":1950,"Q_Id":60197392,"Users Score":0,"Answer":"I have tried Redis Server queuing in order to replace Python standard multiprocessing Queue. It is s NO GO for Redis ! Python is best, fastest and can accept any kind of data type you throw at it, where with Redis and complex datatype such as dict with lot of numpy array etc... you have to pickle or json dumps\/loads which add up overhead to the process.\nCheers,\nSteve","Q_Score":5,"Tags":"python,message-queue,zeromq","A_Id":67898234,"CreationDate":"2020-02-12T21:49:00.000","Title":"High-performance replacement for multiprocessing.Queue","Data Science and Machine Learning":1,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm on Debian using python3.7. I have a network drive that I typically mount to \/media\/N_drive with dir_mode=0777 and file_mode=0777. I generally have no issues with reading\/writing files in this network drive.\nOccasionally, especially soon after mounting the drive, if I try to run any Python script with os.getcwd() (including any imported libraries like pandas) I get the error FileNotFoundError: [Errno 2] No such file or directory. If I cd up to the local drive (cd \/media\/) the script runs fine.\nDoing some reading, it sounds like this error indicates that the working directory has been deleted. Yet I can still navigate to the directory, create files, etc. when I'm in the shell. It only seems to be Python's os.getcwd() that has problems.\nWhat is more strange is that this behavior is not predictable. Typically if I wait ~1 hour after mounting the drive the same script will run just fine. \nI suspect this has something to do with the way the drive is mounted maybe? Any ideas how to troubleshoot it?","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":181,"Q_Id":60207347,"Users Score":1,"Answer":"To me, it seems a problem with the mount, e.g. the network disk will be disconnected, and reconnected. So your cwd is not more valid. Note: cwd is pointing to a disk+inode, it is not a name (which you will see). So \/media\/a is different to \/media\/a after a reconnection.\nIf you are looking on how to solve the mounting, you are in the wrong place. Try Unix&Linux sister site, or Serverfault (also a sister site).\nIf you are looking how to solve programmatically: save cwd at beginning of the script and use os.path.join() at every path access, so that you forcing absolute paths, and not relative paths, and so you should be on the correct location.  This is not save, if you happen to read a file during disconnection.","Q_Score":1,"Tags":"python,debian,getcwd","A_Id":60213141,"CreationDate":"2020-02-13T12:00:00.000","Title":"Python: os.getcwd() randomly fails in mounted network drive","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"while there are multiple versions of Python installed on a Linux machine, is there a way to mention in the script to be open with a specific version, say, 3.8 even if we issue the #python script.py as opposed to python3.8 script.py ?\nI don't want to use Linux alias command. I wanna know if that is possible to be accomplished within the script","AnswerCount":2,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":57,"Q_Id":60221083,"Users Score":1,"Answer":"Use shebang. #!\/usr\/bin\/python\nIn the first line of the code with the serial number of Python you want at the end.\nYou'll need to then run your script like .\/my_script.py","Q_Score":0,"Tags":"python","A_Id":60221218,"CreationDate":"2020-02-14T06:21:00.000","Title":"Opening Python code with a specific version","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to use boost library on Python. In C++ I include boost\\python.hpp but it says it cannot open pyconfig.h. How should I do that? I have a Mac with Parallels installed and my C++ code is in Visual Studio on Parallels. I installed homebrew and boost from the terminal, I already had boost on the Parallels side which I have used different times in C++. In short, I did a mess. How can I fix this?\nThanks!!","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":61,"Q_Id":60234341,"Users Score":0,"Answer":"You need to find pyconfig.h on your machine, then add its directory to your build like -I\/some\/path.  Often it will be in a directory called python3.7 or whatever version you have.","Q_Score":0,"Tags":"c++,python-3.x,boost","A_Id":60235385,"CreationDate":"2020-02-14T22:36:00.000","Title":"boost on python on Mac","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have implemented a Zynq ZCU102 board in vivado and I want to use final \".XSA\" file into VITIS, but after creating a new platform, its languages are C and C++, While in the documentation was told that vitis supports python.\nMy question is how can I add python to my vitis platform?\nThank you","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":440,"Q_Id":60245542,"Users Score":0,"Answer":"Running Python in FPGA needs an Operating System. I had to run Linux OS on my FPGA using petaLinux and then run python code on it.","Q_Score":3,"Tags":"python,fpga,xilinx","A_Id":60378725,"CreationDate":"2020-02-16T04:54:00.000","Title":"how to add python in xilinx vitis","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm trying to use the terminal command find path -print0 | xargs -0 stat -f '%m %N' in a Python project. Obviously I need to supply the path so I've been splitting up the expression inside an array as suggested elsewhere. Currently I have subprocess.call(['find', path, '| xargs -0 stat -f \"%m %N\"']).\nThe code runs but everything after path is ignored. In fact it throws an error find: | xargs -0 stat -f \"%m %N\": No such file or directory so clearly I don't understand the way the command is being made up.\nAny help would be great\nEDIT:\nActually I think supplying the argument from a variable might be better. So i tried command = 'find ' + src_dir + ' -print0 | xargs -0 stat -f \\'%m %N\\''\nLooks OK with print but again when plugged into subprocess.call(osx_command) I get [Errno 2] No such file or directory:","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":19,"Q_Id":60250884,"Users Score":1,"Answer":"Try adding shell=True\nsubprocess.call(['find', path, '| xargs -0 stat -f \"%m %N\"'], shell=True)\nshell=True means executing programs through the shell, all user input passed to the program is interpreted according to the syntax and semantic rules of the invoked shell.","Q_Score":0,"Tags":"python-3.x","A_Id":60251096,"CreationDate":"2020-02-16T16:56:00.000","Title":"Using subprocess.call with variables and single quotes","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"If I have a process that is writing large number of lines on a file and the process got killed in the middle before the file handler is closed. Do I get the content of the lines written successfully?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":127,"Q_Id":60252414,"Users Score":1,"Answer":"It depends on what you mean by \"got killed\" and \"successfully\". If its a python-raised exception then the file is closed (which flushes it to the operating system) because it exited a with clause or because the final reference to the object was removed and its __del__ method was called. This last bit isn't always guaranteed, which is why with clauses are usually used.\nIf the program was killed by an external unhandled exception or crashed because some c library has a bug, then the file isn't closed and whatever data was still in the local process cache is lost. Whatever had already been flushed to the operating system by clib will be there, but not the latest data. And it may be truncated on a memory block boundary. You can call flush often to reduce the amount of lost data. Or perhaps use a memory mapped file and direct io.\nNow to the question of success. Depending on what you're doing, a partially written file may be the worst choice. In fact, I'd wager that's the case more often than not. I'm guilty of this as much as anybody but it makes sense to write to a temporary file and move it on success. Or alternately, deleting the file on failure. Parially written faulty data is a curse.","Q_Score":0,"Tags":"python","A_Id":60253445,"CreationDate":"2020-02-16T19:33:00.000","Title":"Python write files process crashed before closing","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I want to run my Python code within ATOM  in Win10\nI have installed all packeges like: atom-python-run, script but anyway the program is not runnig.\nIn official page written to press F5 ,F6  to run script but doing that tries to compile the script with the gpp package (which I had installed before) as if it were C\/C++ code.\nIs it possible to change button for running a python script?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":1763,"Q_Id":60290921,"Users Score":0,"Answer":"You just need to press additional fn key along with f5 or f6.","Q_Score":0,"Tags":"python,windows-runtime,atom-editor","A_Id":68616582,"CreationDate":"2020-02-18T23:30:00.000","Title":"How to run python scripts in Atom if F5 is not working?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a REST API service that I want to call on at scheduled times. Currently, I call the API using a basic cronjob on a server every day at 8:00am.\nI want to scale up and allow my users to schedule a time they would like to receive the notification from my API call. How could I go about doing this? I know I would need to keep a database of user requests and their associated times, however I am not sure if continuing to use cron is the best way about this... (I would prefer not to use third party services in order to keep costs down)\nI am having trouble wrapping my head this, if anybody has any advice that would be much appreciated!","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":42,"Q_Id":60309869,"Users Score":1,"Answer":"If the time frame is going to be something simple, like one-per-day, once-per-week, etc., using the cron.d folder is a fairly trivial and in my opinion appropriate solution. \nThe simplest way would be each user having their own file with a simple one-line cron statement that reflects their selected time. When the user selects their time, part of your service creates the correct file for that user. You can go on from there. \nWhether or not you put them in a database is really a question of your own system design; given a proper file naming scheme, you could feasibly do this without having to keep that requested time in persistent storage.","Q_Score":0,"Tags":"python,rest,api,automation,cron","A_Id":60329310,"CreationDate":"2020-02-19T21:55:00.000","Title":"How could I schedule an API call that users sign up for?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"So I deleted every instance of python, versions, off my computer then re-installed it and when I type\npython -V in cmd, it says No Python at C:\\(insert file path that does not exist). I went to my environment variables and added a new location in Path and it still shows the No python message. How do I fix this so I can use my new\nC:\\(new destination) for python?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":69,"Q_Id":60346843,"Users Score":0,"Answer":"The issue that happened was that pycharms would not change the outdated path even tho I deleted \/ re-installed it countless times. I un-checked the add to path option and it worked","Q_Score":0,"Tags":"python,python-3.x","A_Id":60404044,"CreationDate":"2020-02-21T22:08:00.000","Title":"Why is my python path pointing to a non existent file?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to develop a code between two python program where I pass a command line argument for the second program to execute from the first program.","AnswerCount":3,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":248,"Q_Id":60353274,"Users Score":0,"Answer":"One approach would be to call a function from the second program instead of using command-line arguments. You can do this by importing the said function.\nAnother approach would be to use command-line arguments as you said, with the command System or the Subprocess module.","Q_Score":1,"Tags":"python,command-line-arguments","A_Id":60353326,"CreationDate":"2020-02-22T14:43:00.000","Title":"How do I pass any file path as a command line argument from one program to another program in Python?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm running the following command using subprocess.check_call \n['\/home\/user\/anaconda3\/envs\/hum2\/bin\/bowtie2-build', '-f', '\/media\/user\/extra\/tmp\/subhm\/sub_humann2_temp\/sub_custom_chocophlan_database.ffn', '\/media\/user\/extra\/tmp\/subhm\/sub_humann2_temp\/sub_bowtie2_index', ' --threads 8']\nBut for some reason, it ignores the --threads argument and runs on one thread only. I've checked outside of python with the same command that the threads are launched. This only happens when calling from subprocess, any idea on how to fix this? \nthanks","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":18,"Q_Id":60358475,"Users Score":1,"Answer":"You are passing '--threads 8' and not '--threads',  '8'. Although it could be '--threads=8' but I don't know the command.","Q_Score":0,"Tags":"python,multithreading,shell","A_Id":60358498,"CreationDate":"2020-02-23T01:42:00.000","Title":"subprocess.check_call command called not using threads","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Which script is executed if a directory is passed as argument to python (e.g. if python is called in this way: $ python3 Domoticz-Google-Assistant\/)?\nBest regards,\nwewa","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":30,"Q_Id":60363746,"Users Score":1,"Answer":"If you execute a directory as an argument to python, the file named __main__.py will be executed.","Q_Score":1,"Tags":"python,command-line,debian,command-line-arguments","A_Id":60363890,"CreationDate":"2020-02-23T15:25:00.000","Title":"Which python script is executed if directory path is passed as command line argument to python?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am looking for a way to boot an unattended diagnostic on HPE Proliant G10 units and to execute a specified test within embedded diagnostics (in this case extensive system test).\nSo far i understand you can boot directly to embedded diagnostics through redfish however i can't find a way to attach more instructions to the boot command in order to when booted into embedded diagnostics, continue and execute extensive system test.\nDoes anyone know of any possible workaround to achieve this?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":52,"Q_Id":60372592,"Users Score":0,"Answer":"After i have been in contact with HPE regarding this issue and after they have checked internally it turns out that there really is not a built in way to do this. Once the embedded diagnostics is booted it no longer have any active connection to the iLO itself and can't take commands such as what to do once booted.\nIf anyone would find some innovative solution to this, please contact me :)!\nBest regards,\nNuzvee","Q_Score":0,"Tags":"python,python-3.x,rest,boot,diagnostics","A_Id":60505084,"CreationDate":"2020-02-24T09:10:00.000","Title":"HPE redfish - boot unattended embedded diagnostics","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am brand new to python and programming more generally so 1) I'm an ignorant noob and I apologize and 2) I'm really just using IDLE for very basic learning. I'm running python 3.7.6 on Mac OS Catalina 10.15.3\nMy problem is bizarre: When I go to save a new .py file, IDLE freezes and becomes unresponsive. I'll hit CMD+S on a new\/'Untitled.py' file, the save folder will pop open, and I can name the new file\/navigate folders, but once I hit \"Save\", the program freezes with the save folder still open, except now the Save\/Cancel buttons are greyed out and the entire application becomes unresponsive. My only recourse is to Force Quit and relaunch IDLE, and the new file I was trying to save never saved. You can imagine how fun this is.\nWhat's weird is it doesn't happen every time. If I open IDLE, open a new file and very quickly\/immediately save (which I try to do by default), then the file will save. Once I've saved it once, I have no problems saving the existing file as I work on it. That is, the issue is only with the creation\/save of new files. I'm also not sure why sometimes I can Save a new file and other times (especially if IDLE has been open for a while) it crashes.\nTo be clear: I can open files, save existing files, and run programs I've written without incident. I am not getting any warnings, crash notifications, or notices of any kind that even acknowledge that IDLE is acting up. \nI had 3.8, which I replaced for 3.7.6 thinking a more stable version might solve my problems, but no dice. I only have python 3.7.6 on my computer: No python 2, nothing else. I have no idea what's going on but this is super frustrating and I just want to be able to learn Python without these weird roadblocks.\nPlease help!","AnswerCount":5,"Available Count":5,"Score":0.0,"is_accepted":false,"ViewCount":3766,"Q_Id":60384798,"Users Score":0,"Answer":"I had the same problem, and as Aadi suggested, I was able to fix it by changing the location of where the file was saved. Possibly, this relates to very long paths, at least in Windows 10.\nThe path that didn't work was 114 characters long. The path that did work was 93 characters long. The paths are the same up to character 80 and use underscore (_) but no unusual characters.","Q_Score":3,"Tags":"python,macos,tkinter,freeze,python-idle","A_Id":63677364,"CreationDate":"2020-02-24T22:24:00.000","Title":"IDLE freezing\/unresponsive when saving new file","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am brand new to python and programming more generally so 1) I'm an ignorant noob and I apologize and 2) I'm really just using IDLE for very basic learning. I'm running python 3.7.6 on Mac OS Catalina 10.15.3\nMy problem is bizarre: When I go to save a new .py file, IDLE freezes and becomes unresponsive. I'll hit CMD+S on a new\/'Untitled.py' file, the save folder will pop open, and I can name the new file\/navigate folders, but once I hit \"Save\", the program freezes with the save folder still open, except now the Save\/Cancel buttons are greyed out and the entire application becomes unresponsive. My only recourse is to Force Quit and relaunch IDLE, and the new file I was trying to save never saved. You can imagine how fun this is.\nWhat's weird is it doesn't happen every time. If I open IDLE, open a new file and very quickly\/immediately save (which I try to do by default), then the file will save. Once I've saved it once, I have no problems saving the existing file as I work on it. That is, the issue is only with the creation\/save of new files. I'm also not sure why sometimes I can Save a new file and other times (especially if IDLE has been open for a while) it crashes.\nTo be clear: I can open files, save existing files, and run programs I've written without incident. I am not getting any warnings, crash notifications, or notices of any kind that even acknowledge that IDLE is acting up. \nI had 3.8, which I replaced for 3.7.6 thinking a more stable version might solve my problems, but no dice. I only have python 3.7.6 on my computer: No python 2, nothing else. I have no idea what's going on but this is super frustrating and I just want to be able to learn Python without these weird roadblocks.\nPlease help!","AnswerCount":5,"Available Count":5,"Score":-0.0399786803,"is_accepted":false,"ViewCount":3766,"Q_Id":60384798,"Users Score":-1,"Answer":"I also came across with same issue, this is only issue of currupt file,please delete recent python IDLE file that you have created,this will definately work","Q_Score":3,"Tags":"python,macos,tkinter,freeze,python-idle","A_Id":64229624,"CreationDate":"2020-02-24T22:24:00.000","Title":"IDLE freezing\/unresponsive when saving new file","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am brand new to python and programming more generally so 1) I'm an ignorant noob and I apologize and 2) I'm really just using IDLE for very basic learning. I'm running python 3.7.6 on Mac OS Catalina 10.15.3\nMy problem is bizarre: When I go to save a new .py file, IDLE freezes and becomes unresponsive. I'll hit CMD+S on a new\/'Untitled.py' file, the save folder will pop open, and I can name the new file\/navigate folders, but once I hit \"Save\", the program freezes with the save folder still open, except now the Save\/Cancel buttons are greyed out and the entire application becomes unresponsive. My only recourse is to Force Quit and relaunch IDLE, and the new file I was trying to save never saved. You can imagine how fun this is.\nWhat's weird is it doesn't happen every time. If I open IDLE, open a new file and very quickly\/immediately save (which I try to do by default), then the file will save. Once I've saved it once, I have no problems saving the existing file as I work on it. That is, the issue is only with the creation\/save of new files. I'm also not sure why sometimes I can Save a new file and other times (especially if IDLE has been open for a while) it crashes.\nTo be clear: I can open files, save existing files, and run programs I've written without incident. I am not getting any warnings, crash notifications, or notices of any kind that even acknowledge that IDLE is acting up. \nI had 3.8, which I replaced for 3.7.6 thinking a more stable version might solve my problems, but no dice. I only have python 3.7.6 on my computer: No python 2, nothing else. I have no idea what's going on but this is super frustrating and I just want to be able to learn Python without these weird roadblocks.\nPlease help!","AnswerCount":5,"Available Count":5,"Score":0.0,"is_accepted":false,"ViewCount":3766,"Q_Id":60384798,"Users Score":0,"Answer":"You don't have to make\/save python files in IDLE. You can open any text editor, type the code, and save as name.py. Then you can open that in IDLE. I would use that for now.","Q_Score":3,"Tags":"python,macos,tkinter,freeze,python-idle","A_Id":64082478,"CreationDate":"2020-02-24T22:24:00.000","Title":"IDLE freezing\/unresponsive when saving new file","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am brand new to python and programming more generally so 1) I'm an ignorant noob and I apologize and 2) I'm really just using IDLE for very basic learning. I'm running python 3.7.6 on Mac OS Catalina 10.15.3\nMy problem is bizarre: When I go to save a new .py file, IDLE freezes and becomes unresponsive. I'll hit CMD+S on a new\/'Untitled.py' file, the save folder will pop open, and I can name the new file\/navigate folders, but once I hit \"Save\", the program freezes with the save folder still open, except now the Save\/Cancel buttons are greyed out and the entire application becomes unresponsive. My only recourse is to Force Quit and relaunch IDLE, and the new file I was trying to save never saved. You can imagine how fun this is.\nWhat's weird is it doesn't happen every time. If I open IDLE, open a new file and very quickly\/immediately save (which I try to do by default), then the file will save. Once I've saved it once, I have no problems saving the existing file as I work on it. That is, the issue is only with the creation\/save of new files. I'm also not sure why sometimes I can Save a new file and other times (especially if IDLE has been open for a while) it crashes.\nTo be clear: I can open files, save existing files, and run programs I've written without incident. I am not getting any warnings, crash notifications, or notices of any kind that even acknowledge that IDLE is acting up. \nI had 3.8, which I replaced for 3.7.6 thinking a more stable version might solve my problems, but no dice. I only have python 3.7.6 on my computer: No python 2, nothing else. I have no idea what's going on but this is super frustrating and I just want to be able to learn Python without these weird roadblocks.\nPlease help!","AnswerCount":5,"Available Count":5,"Score":0.0399786803,"is_accepted":false,"ViewCount":3766,"Q_Id":60384798,"Users Score":1,"Answer":"I've also had this problem, and what I did was change the location of where the file would save. I suggest trying this to help.","Q_Score":3,"Tags":"python,macos,tkinter,freeze,python-idle","A_Id":63419425,"CreationDate":"2020-02-24T22:24:00.000","Title":"IDLE freezing\/unresponsive when saving new file","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am brand new to python and programming more generally so 1) I'm an ignorant noob and I apologize and 2) I'm really just using IDLE for very basic learning. I'm running python 3.7.6 on Mac OS Catalina 10.15.3\nMy problem is bizarre: When I go to save a new .py file, IDLE freezes and becomes unresponsive. I'll hit CMD+S on a new\/'Untitled.py' file, the save folder will pop open, and I can name the new file\/navigate folders, but once I hit \"Save\", the program freezes with the save folder still open, except now the Save\/Cancel buttons are greyed out and the entire application becomes unresponsive. My only recourse is to Force Quit and relaunch IDLE, and the new file I was trying to save never saved. You can imagine how fun this is.\nWhat's weird is it doesn't happen every time. If I open IDLE, open a new file and very quickly\/immediately save (which I try to do by default), then the file will save. Once I've saved it once, I have no problems saving the existing file as I work on it. That is, the issue is only with the creation\/save of new files. I'm also not sure why sometimes I can Save a new file and other times (especially if IDLE has been open for a while) it crashes.\nTo be clear: I can open files, save existing files, and run programs I've written without incident. I am not getting any warnings, crash notifications, or notices of any kind that even acknowledge that IDLE is acting up. \nI had 3.8, which I replaced for 3.7.6 thinking a more stable version might solve my problems, but no dice. I only have python 3.7.6 on my computer: No python 2, nothing else. I have no idea what's going on but this is super frustrating and I just want to be able to learn Python without these weird roadblocks.\nPlease help!","AnswerCount":5,"Available Count":5,"Score":0.0,"is_accepted":false,"ViewCount":3766,"Q_Id":60384798,"Users Score":0,"Answer":"I'd suggest reinstalling python idle (your programs will be saved). If this doesn't work then maybe it has something to do with your security on the mac.","Q_Score":3,"Tags":"python,macos,tkinter,freeze,python-idle","A_Id":60671970,"CreationDate":"2020-02-24T22:24:00.000","Title":"IDLE freezing\/unresponsive when saving new file","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Mac has recently updated its terminal shell to Zsh from bash. As a python programmer, I'd like to have a consistency in python versions across all the systems that includes terminals, & IDE.\nOn a bash shell, to update the python version in the terminal to 3.8.1, I had followed the below process\nnano ~\/.bash_profile\nalias python=python3\nctrl + x\ny\nenter\nThis enabled me to update the python version from 2.7.6 to 3.8.1. However, repeating the same steps for zsh shell didn't work out. Tried a tweak of the above process, and somehow stuck with 3.7.3\nsteps followed\nwhich python3 #Location of the python3.8.1 terminal command file is found. Installed it.\npython --version #returned python 3.7.3\nPS: I am an absolute beginner in python, so please consider that in your response. I hope i am not wasting your time.","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":1124,"Q_Id":60399694,"Users Score":1,"Answer":"it is actually not recommendet to update the default Python executable system-wide because some applications are depending on it.\nAlthough, you can use venv (virtual environment) or for using another version of Python within your ZSH you can also put an alias like python='python3' in  your ~\/.zsh_profile and source it.\nHope that helps.\nGreetings","Q_Score":0,"Tags":"python,bash,shell,terminal,zsh","A_Id":60399819,"CreationDate":"2020-02-25T16:58:00.000","Title":"When switching to zsh shell on mac terminal from bash, how do you update the base python version?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a docker image that consists of a python script, which takes some arbitrary source code and eval()'s it\nLet's say the code was rm -rf. Would this delete anything on the host's file system? \nI think the answer is \"no\", but I just want to confirm before trying it out.","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":841,"Q_Id":60403970,"Users Score":1,"Answer":"So on the one hand, yes, Docker's filesystem isolation means that commands like rm -rf by default can't do more than corrupt the container's filesystem.\nThere's a fairly wide variety of things people do routinely that weaken this.  Do you bind-mount your host's source code into the container to simplify development?  Malicious code could corrupt your development tree, or surreptitiously slip commits into your .git directory.  Bind-mount the Docker socket into the container so you can launch other containers?  It's trivial to take advantage of that to root the whole host.\nThis is also just a narrow slice of what's possible with eval().  Linux kernel exploits happen fairly regularly, and since Docker containers share the host kernel, eval()ed code could take advantage of this.  There are also things like cryptocurrency miners that aren't dangerous per se but you still don't want to be running them for other people.\nAs far as your narrow question goes, yes, Docker gives you protection from malicious code corrupting the host filesystem, but there are still a lot of other things malicious code could do and I would not try to use a Docker container as a sandbox for truly untrusted code.","Q_Score":0,"Tags":"python,docker,file","A_Id":60405371,"CreationDate":"2020-02-25T22:14:00.000","Title":"Can \"rm -rf\" on a docker container delete files on the host?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"How do I add python to path? Whenever I type 'python' in cmd, it opens Python in the Microsoft Store even though I have previously installed Python through their website. However, when I type 'py' in cmd, python starts.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":200,"Q_Id":60410835,"Users Score":0,"Answer":"You can go to Control Panel ->System and Security->System -> Advanced System Settings\nThis opens a SystemPropertyDialogBox(Advanced) -> Environment Variables -> Add the Python Path in Path Environment variable\nAnd then use another Command Prompt.","Q_Score":0,"Tags":"python","A_Id":60410958,"CreationDate":"2020-02-26T09:39:00.000","Title":"How do I add Python to path in Windows?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a bash script to deploy some code to AWS.  It mostly works but I'm having issues activating my virtual environment.   It seems it might be to do with line endings because I'm trying to activate a windows venv using Scripts\/activate.\nI see these types of errors in the logs:\nScripts\/activate: line 3: $'\\r': command not found\nScripts\/activate: line 4: $'\\r': command not found\nScripts\/activate: line 10: syntax error near unexpected token `$'{\\r''\nMy script creates, installs packages then destroys the venv.  If I comment out the creating and destroy and change the line endings of the activate script to 'LF' it works.   So How can I force LF endings instead of CRLF on virtual env creation?\nThis is the line that is creating the env at the moment:\nvirtualenv $VENV","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":179,"Q_Id":60410921,"Users Score":1,"Answer":"fixed with dos2unix command\ndos2unix Scripts\/activate","Q_Score":1,"Tags":"python,bash,amazon-web-services,aws-lambda,virtualenv","A_Id":60411524,"CreationDate":"2020-02-26T09:43:00.000","Title":"activating python venv from bash in Windows. How to resolve problem with line endings?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a flask based app, when I run coverage on the pytests in windows using python 3.8 it runs very slowly. It performs much better in python 3.7. The following are the test completion times using a the same laptop, the Ubuntu times are the same machine running as a VM.\n\npython 3.8.2 - Windows 10 - coverage - **199** seconds\npython 3.8.2 - Windows 10 - pytest - 15 seconds\npython 3.8.2 - Ubuntu - coverage -  26 seconds\npython 3.8.2 - Ubuntu - pytest - 15 seconds\npython 3.7.5 - Windows 10 - coverage - **30** seconds\npython 3.7.5 - Windows 10 - pytest - 15 seconds\npython 3.7.5 - Ubuntu - coverage -  26 seconds\npython 3.7.5 - Ubuntu - pytest - 15 seconds\n\nDoes anyone have any idea why 3.8 on windows running coverage is so slow?","AnswerCount":1,"Available Count":1,"Score":0.537049567,"is_accepted":false,"ViewCount":308,"Q_Id":60437839,"Users Score":3,"Answer":"The cause is that with python 3.8 coverage is installing without C extensions, but with 3.7 it is installing with c extensions. \nNow I need to find out why this is the case.","Q_Score":2,"Tags":"python,windows,ubuntu","A_Id":60451563,"CreationDate":"2020-02-27T16:35:00.000","Title":"coverage runs very slowly on windows with python 3.8, but not 3.7","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am learning how to execute adb commands using python And I noticed that to execute adb command\nwe can use cmd : Adb.cmd(\"shell\",\"ls\")\nit's clear that the result will be : adb shell ls \nBut I want to understand the use of \"cmd\". Can someone explain that to me . thanks","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":108,"Q_Id":60440094,"Users Score":0,"Answer":"cmd is a method of the Adb Python class, which allows you to execute commands on the previously selected device.","Q_Score":0,"Tags":"python,android,adb","A_Id":60440228,"CreationDate":"2020-02-27T19:03:00.000","Title":"Using python to execute adb commands","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I need to integrate pivotal tracker manually because I want some extra options, but I'm getting a \"failed to open TCP connection\" error.\nI'm working from localhost and gitlab is in an intranet. I've tried both the example in ruby in the docs and a similar script in python, but both give me the same error.\nWould appreciate any help to resolve it. Thanks","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":1199,"Q_Id":60441326,"Users Score":0,"Answer":"add the IP address to the HOSTS file.","Q_Score":0,"Tags":"gitlab,webhooks,gitlab-api,git-webhooks,python-gitlab","A_Id":67804914,"CreationDate":"2020-02-27T20:32:00.000","Title":"Hook execution failed: Failed to open TCP connection to ::1:8000 (Connection refused - connect(2) for \"::1\" port 8000)","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"As part of a larger project, I'm currently writing a python script that runs Linux commands in a vApp.\nI'm currently facing an issue where after working with a mounted iso, it may or may not unmount as expected.\nTo check the mount status, I want to run the df -hk \/directory and du -sch \/directory commands respectively, and compare the outputs.\nIf the iso is not unmounted, the result for the df command should return a larger value than the du command as the df command includes the mount size in the result, while du does not.\nI'm just wondering how can i compare these values or if there is a better way for me to run this check in the first place.","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":154,"Q_Id":60450774,"Users Score":1,"Answer":"why don't you use \/proc\/mounts ?\nFirst column is you blockdevice, second is the mountpoint.\nIf you mountpoint is not in \/proc\/mounts you have nothing mounted here.","Q_Score":0,"Tags":"python,linux,command-line-interface,mount,linux-disk-free","A_Id":60450845,"CreationDate":"2020-02-28T11:26:00.000","Title":"Python Script to compare du and df console outputs","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"when I do a pip install jupyter notebook, which it seems to install and then I run \"jupyter notebook\" it tells me that \"zsh: command not found: jupyter\"\nAlso does it matter using zsh on macOS?\nAny suggestions too fix this issue?\nThanks!\nJohnny","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":293,"Q_Id":60457784,"Users Score":0,"Answer":"I faced a similar problem. If you've installed it using --user try to add to your path variable in .zshrc a path like this \/Users\/<name_of_your_user>\/Library\/Python\/3.8\/bin. Replace <name_of_your_user> with name of the user and maybe you have another version of python and the folder 3.8 should be replaced with the corresponding version. It helped me. Please check if that works for you and mark the question as solved if it did.","Q_Score":1,"Tags":"python,macos,pip,jupyter","A_Id":63859520,"CreationDate":"2020-02-28T19:03:00.000","Title":"installing jupyter notebooks on macOS","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am publishing same data (Topic, Key & Value) from python confluent_kafka library based Producer v\/s Java apache library based producer but when messages checked on Kafka then they are published to different \nKafka Partition.\nI was expecting by default both these library will use same hash method (murmur2) on Key and will determine same partition when publishing message to Kafka, but looks like that is is not happening.\nIs there flag or option that needs to be set on Python library so that it will use same algorithm and generate same (as Java library) Kafka partition OR is there any other python library that should be used to achieve this?","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":218,"Q_Id":60457993,"Users Score":0,"Answer":"I found a way to force confluent_kafka Producer to use murmur2 algorithm to determine partition. You can set below parameter with value:\n'partitioner': 'murmur2_random'","Q_Score":0,"Tags":"python,apache-kafka,confluent-platform","A_Id":60458635,"CreationDate":"2020-02-28T19:18:00.000","Title":"Kafka different partitions are selected python confluent_kafka library v\/s apache kafka Java","Data Science and Machine Learning":1,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm trying to install python 3 and jupyter on Catalina.\nI installed the latest version (3.7) from Anaconda distribution, but if I type\npython --version in the command line I get \"Python 2.7.16\"\nIf I type jupyter notebook, i get zsh: command not found: jupyter\nI have also installed python 3.8.2 from python.org, I thought this might help.\nWhat can I do now to get it running?","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":130,"Q_Id":60468497,"Users Score":0,"Answer":"This is the solution for the jupyter problem:\n\ncd into your installation directory of anaconda in terminal\nGo into bin folder and drag the binary named conda into the terminal and type init zsh","Q_Score":1,"Tags":"python,jupyter-notebook","A_Id":60469234,"CreationDate":"2020-02-29T18:50:00.000","Title":"Can't install Python 3 \/ Jupyter on Catalina properly","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a React Application and I'm looking to run a CMD Command-Line function from a button click.\nWhat is the best way of doing this?\nI am able to run the cmd command through a python script of my own however how could I run this python from React as React is hosted on localhost and security permissions limit access to cmd from there.\nShould I be looking to set up a python server to host the python script?\nAlternatively, I have been looking at Node.js would that be a better way of running this python script and ultimately connect to cmd?","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":1769,"Q_Id":60477750,"Users Score":0,"Answer":"React is working in the browser so it's impossible to directly access command line.","Q_Score":2,"Tags":"javascript,python,node.js,reactjs,command-line","A_Id":60477818,"CreationDate":"2020-03-01T17:23:00.000","Title":"Calling CMD command line from ReactJS application","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a React Application and I'm looking to run a CMD Command-Line function from a button click.\nWhat is the best way of doing this?\nI am able to run the cmd command through a python script of my own however how could I run this python from React as React is hosted on localhost and security permissions limit access to cmd from there.\nShould I be looking to set up a python server to host the python script?\nAlternatively, I have been looking at Node.js would that be a better way of running this python script and ultimately connect to cmd?","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":1769,"Q_Id":60477750,"Users Score":0,"Answer":"You need to configure a server side and  use the child-process module\nimport * as child from 'child_process'; \nthen in your function use :\nchild.exec(\"your command line\")","Q_Score":2,"Tags":"javascript,python,node.js,reactjs,command-line","A_Id":70127199,"CreationDate":"2020-03-01T17:23:00.000","Title":"Calling CMD command line from ReactJS application","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I need to perform some background advanced calculations on my data after it is collected in InfluxDb which is stored on the edge server, which means I have limited resources for the calculations.\nAlso I cannot block the data collection while I do calculations.\nI am weighing using Kapacitor UDF streams vs custom Python scripts.\nPlease note I need to make the scripts configurable so that I can easily deply them to different environments with different sensors","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":104,"Q_Id":60482622,"Users Score":1,"Answer":"It probably makes little difference, in general, especially for 'simple' usecases, though I lean towards standalone python scripts. (It may be better to use Kapacitor if you can cover your usecase using the kapacitor language for this instead of python based UDFs, but I found it insufficient since I needed to retrieve additional data from other databases)\n\nStandalone python scripts could be a bit lighter, since you don't need to run the Kapacitor service.  \nStandalone python scripts could be a bit more configurable. Kapacitor is also pretty configurable but you'd have to spend a bit of time learning how to use it.  \nStandalone python scripts could be a bit more stable. I've experimented with python UDF's a couple of years ago and found them unstable and buggy. While this may have improved by now, you'd still be relying on this being supported and if go is not your language you might have trouble debugging and fixing issues yourself.","Q_Score":0,"Tags":"python,user-defined-functions,influxdb,kapacitor","A_Id":60491850,"CreationDate":"2020-03-02T04:40:00.000","Title":"Python cron job vs Kapacitor UDF","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I used cmake to build my project. I tried sudo apt-get install libboost-all-dev, but it didn't solve my issue. Is there a way to solve this problem? Thanks.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":1081,"Q_Id":60485840,"Users Score":0,"Answer":"I had a similar problem, and found that the needed library was installed under the name \/usr\/lib\/<arch>\/libboost_python38.so (for x86_64 in my case that's \/usr\/lib\/x86_64-linux-gnu\/libboost_python38.so).\nSo I ran sudo ln -s \/usr\/lib\/x86_64-linux-gnu\/libboost_python38.so \/usr\/lib\/x86_64-linux-gnu\/libboost_python-py38.so and was able to link OK.\nI ran into this specifically when trying to install pygattlib under python 3.8.","Q_Score":1,"Tags":"boost-python","A_Id":68330070,"CreationDate":"2020-03-02T09:26:00.000","Title":"how to install boost_python-py38 on ubuntu system","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a kubernetes multi-resource file which contains different resources that are to be applied for e.g. deployment-definition, service-defintion, pv, pvc etc. Is there any way to use this single file through kubernetes python client to deploy all these resources at once ?\nThough my scenario is a bit different. I have a file which use CRDs alongwith custom kubernetes resource objects for e.g. Deployment + ambassador's Mapping. How to achieve this using kubernetes python client?","AnswerCount":3,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":1409,"Q_Id":60486407,"Users Score":0,"Answer":"With the client, you have to do them all separately. When you have multiple documents in a YAML file, kubectl just splits them for you and makes an API call for each.","Q_Score":0,"Tags":"kubernetes,kubectl,kubernetes-python-client,ambassador","A_Id":60486524,"CreationDate":"2020-03-02T10:01:00.000","Title":"How to use a multiple kubernetes resource file through kubernetes python client similar to kubectl apply -f","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"When I CTRL + F5, the terminal output shows verbosity that I would like to hide:\n\ncd \/home\/ ; env PYTHONIOENCODING=UTF-8 PYTHONUNBUFFERED=1 \/usr\/bin\/python3 \/home\/.vscode\/extensions\/ms-python.python-2020.2.64397\/pythonFiles\/ptvsd_launcher.py --default --nodebug --client --host localhost --port 33907 \/home\/hello.py\nHello\n\nJust print Hello...","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":440,"Q_Id":60487986,"Users Score":1,"Answer":"There is unfortunately no way to hide this output as it's required to execute the debugger.","Q_Score":2,"Tags":"python,visual-studio-code,vscode-settings","A_Id":60514004,"CreationDate":"2020-03-02T11:32:00.000","Title":"How to make vscode debugging in the terminal less verbose?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"TBH I'm beginner in learning python but I'm working well when it's come to reading the man page of Linux and the notation\/conventin of it \nSuch as \n-- bold text is type exactly as shown in synopsis\n-- italic text replaced with the appropriate argument \n-- [-abc] all of this are optional \n.... Etc are in man man command \nBut how I can read the synopsis that return from help('smething')","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":17,"Q_Id":60504225,"Users Score":0,"Answer":"Just type help(), then enter and type 'smething'","Q_Score":0,"Tags":"python,python-2.7","A_Id":60504402,"CreationDate":"2020-03-03T09:40:00.000","Title":"I can't read the return of built-in help() in python... Because the notation of documentation can't be understood","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I installed Python 3.7 in Ubuntu 18.04. Now as Ubuntu is written in Python 3.6, there are many applications that explicitly point to Python3 (which in my case is now 3.7). Is there any way I can explicitly make them point to 3.6 instead of default Python3\nNote - I was facing same issue in my terminal. It wasn't opening. So I opened it's config file and changed python 3 to python 3.6","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":31,"Q_Id":60515860,"Users Score":0,"Answer":"Make an alias, put it in your ~\/.bashrc file or some other alias file you have. \nalias python = python3.7","Q_Score":0,"Tags":"python-3.x,ubuntu-18.04","A_Id":60515931,"CreationDate":"2020-03-03T21:33:00.000","Title":"Pointing Python in Ubutnu to 3.6","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm on windows, and pip was working just fine, but now it's giving this error message, unclear what changed.\n\"Fatal error in launcher: Unable to create process using '\"c:\\python.exe\"  \"C:\\Scripts\\pip.exe\" ': The system cannot find the file specified.\"","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":66,"Q_Id":60518503,"Users Score":0,"Answer":"It seems to be that your system is not able to find 'c:\\python.exe', try looking at this location if the file is present.\n\nTry creating environment variables by name \"python\" which runs your python executable present at 'c:\\python.exe'\n\nEasy way if you struggle in step 1\n\nRe-install python and add path of python","Q_Score":0,"Tags":"python,windows,pip","A_Id":60518618,"CreationDate":"2020-03-04T03:07:00.000","Title":"pip is giving an error and i can't find an explanation","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am using CentOS 8. I'm trying to install Python 3. Command: sudo dnf install python3. Error:\n\nFailed to synchronize cache for repo 'BaseOS'\n\nHow can I fix this?","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":3438,"Q_Id":60540892,"Users Score":0,"Answer":"Change the baseurl from mirror.centos.org to vault.centos.org in the appropriate repo file here:\n\/etc\/yum.repos.d\/","Q_Score":1,"Tags":"python,linux,centos","A_Id":71877953,"CreationDate":"2020-03-05T08:20:00.000","Title":"Install Python 3 on Centos 8 returns \"Failed to synchronize cache for repo 'BaseOS'\"","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to use RUN conda install -c conda-forge tesseract in my dockerfile to install the tesseract-ocr package.  All my other conda install packages have worked fine using that method.  I've looked at the GIT for tesseractocr https:\/\/github.com\/sirfz\/tesserocr\/blob\/master\/Dockerfile and it seems that the references they have in their docker example are out of date since the links to some of the dependencies return 'not found'. \nMy base image is continuumio\/anaconda3\nHow can I get this library to install in this docker container?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":334,"Q_Id":60547269,"Users Score":0,"Answer":"Just wanted to close this out.  I used conda install -y -c conda-forge tesseract\nwith the -y being the operative function that allowed the process to complete.","Q_Score":0,"Tags":"python,docker,tesseract,anaconda3","A_Id":60554895,"CreationDate":"2020-03-05T14:10:00.000","Title":"I can't Conda install Tesseract in a continuumio\/anaconda3 Docker container","Data Science and Machine Learning":1,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm trying to develop a windows gui app with python and i will distribute that later. I don't know how to set the app for some future releasing updates or bug fix from a server\/remotely. How can I handle this problem? Can I add some auto-update future to app? What should write for that in my code and what framework or library should I use? \nDo pyinstaller\/ inno setup have some futures for this?\nThanks for your help.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":637,"Q_Id":60554861,"Users Score":1,"Answer":"How about this approach:\n\nYou can use a version control service like github to version control your code. \nThen checkout the repository on your windows machine. \nWrite a batch\/bash script to checkout the latest version of your code and restart the app. \nThen use the Windows task scheduler to periodically run this script.","Q_Score":1,"Tags":"python,server,remote-access,auto-update","A_Id":60555326,"CreationDate":"2020-03-05T22:26:00.000","Title":"How to update python script\/application remotely","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"i have one AWS Batch-Job which is working fine, the scenario is when we want to run the Job we are submitting Batch-Job using python BOTO3 SDK.\nNow I want to schedule the Batch-Job in which I can specify the time and it needs to submit Batch-Job on the specified time. I'm using cloud watch right now but, I want to specify some parameters while submitting the Batch-Job. \nAny one have idea about any AWS service where i can make schedule event with some parameter and it need to submit Batch-Job with those parameter as a environment variable.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":173,"Q_Id":60558674,"Users Score":0,"Answer":"You could use a Lambda function. You can set up a Lambda function on a schedule, and it can use boto3 to submit a Batch job with the necessary parameters.","Q_Score":0,"Tags":"python-2.7,amazon-web-services,amazon-cloudwatch,aws-batch","A_Id":61377131,"CreationDate":"2020-03-06T06:29:00.000","Title":"AWS Schedule Batch-Job via Boto3 SDK with pass some environment variable","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I want to open a python file in cmder terminal quickly. Currently, the fastest way i know how is to navigate to the directory of the python file in cmder terminal and then run it by calling \"python file.py\". This is slow and cumbersome. Is there a way for me to have a file or exe, that, when i run it (or drag the program onto it), automatically makes the program run in cmder straight away.\nWindows 10\nClarification: I'm using cmder terminal specifically because it supports text coloring. Windows terminal and powershell do not support this.","AnswerCount":2,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":1398,"Q_Id":60562184,"Users Score":0,"Answer":"Answer: The escape codes just weren't properly configured for the windows terminals. You can get around this by using colorama's colorama.init(). It should work after that.","Q_Score":1,"Tags":"python","A_Id":61590232,"CreationDate":"2020-03-06T10:30:00.000","Title":"How to open a python file in Cmder Terminal Quicker?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I want to open a python file in cmder terminal quickly. Currently, the fastest way i know how is to navigate to the directory of the python file in cmder terminal and then run it by calling \"python file.py\". This is slow and cumbersome. Is there a way for me to have a file or exe, that, when i run it (or drag the program onto it), automatically makes the program run in cmder straight away.\nWindows 10\nClarification: I'm using cmder terminal specifically because it supports text coloring. Windows terminal and powershell do not support this.","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":1398,"Q_Id":60562184,"Users Score":0,"Answer":"On windows you can go to the directory with the file in the explorer and then simply hold shift as you right click at the same time. This will open the menu and there you will have the option to use the command shell\/powershell and then you don't have to navigate to the directory inside the shell anymore and can just execute the python file.\nI hope that helps.","Q_Score":1,"Tags":"python","A_Id":60562358,"CreationDate":"2020-03-06T10:30:00.000","Title":"How to open a python file in Cmder Terminal Quicker?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am looking for a way, to invoke simple python one-liners directly from Windows cmd without the need to store a .py file somewhere.\nSomething like\npython print('Test').\nIs this possible?","AnswerCount":2,"Available Count":1,"Score":-0.0996679946,"is_accepted":false,"ViewCount":57,"Q_Id":60562593,"Users Score":-1,"Answer":"you could just type python3 on your cmd and you'll get a sort of python debugger in which you can type and test your code.\nso let's just type, print('Test') and it will execute","Q_Score":1,"Tags":"python,windows,cmd,command-line-interface","A_Id":60562685,"CreationDate":"2020-03-06T10:54:00.000","Title":"Run python command directly on cmd in Windows","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Problem\nI am not able to setup the path variables such that my scripts work by double clicking them in windows 10. I was able to do this perfectly fine until I uninstalled and reinstalled Anaconda (Python 3.7.4). After trouble shooting this issue with many forums and online articles, I am no more closer to the solution. I understand that my user path variables need to be set to locate python and such but that is about it. I have put in all of my path variables in C:\\Users\\name\\Anaconda3 also with the specified folders of \\Scripts, \\envs, \\Lib, \\libs, \\pkgs, etc. \nMy scripts work fine in IDE like Spyder, the scripts are set to open with python.exe in the Anaconda3 folder, the Anaconda shell recognizes python, and I have read all of the other stackoverflow posts about this to no avail.\nAfter clicking the script a terminal opens but closes immediately in which the script is supposed to run and print results in the terminal.\nI ask that someone to (1) please explain to me the important aspects of setting this up so I can understand what is going on and (2) please give me some useful trouble shooting advise to solve this issue. \nThank you\n\nUpdate with my solution\nLooks like the single only important path to specific is:\nC:\\Users\\Killian\\Anaconda3\\Library\\bin\nand now the scripts run by double clicking.\nIf anyone has a good explanation for this to help me and others understand this issue better, that would be great.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":99,"Q_Id":60567397,"Users Score":0,"Answer":"By the sound of it, you have set up everything correctly. You must remember that the terminal will close once it has done executing the commands in your script. It is likely that that is the reason for the terminal closing. Add a line input() to the end of your script to hold the terminal from closing.\nE.g.\nA script with the one line:\nprint('hello world')\nwill cause the terminal to close immediately one the command is executed.\nHowever, the script with two lines:\nprint('hello world')\ninput()\nwill cause the terminal to be held by the input command","Q_Score":0,"Tags":"python,windows,anaconda","A_Id":60568573,"CreationDate":"2020-03-06T15:45:00.000","Title":"Python scripts do not work by double clicking on Windows 10","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a django app running in a docker container. I bashed into the container and used python manage.py startapp. However, the created directories and files appear to be read-only. From within intellij, I am unable to edit the files. I get a popup offering to clear the readonly status, but that just gives me an error unable to clear readonly status on the following files. \nHow can I edit my files outside of the container?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":427,"Q_Id":60570483,"Users Score":2,"Answer":"You are probably running your container as root user. Hence you do not have the permission to edit them via your editor.\nTry running your container with a regular user (for example docker run  --user 1000:1000 whatever-you-need).","Q_Score":0,"Tags":"python,django,docker","A_Id":60571741,"CreationDate":"2020-03-06T19:32:00.000","Title":"manage.py startapp creates read-only files from within docker","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"My latest python debugging workflow appears extremely slow to me, and little satifying. How can I improve?\nSetting: I work with some third-party python packages from github.\nWorkflow:\n\nrun into error after entering some command to the terminal (Ubuntu WSL, python 3.7)\nread terminal error message output, most likely the first or last one is helpful \nfrom the last message i take the code reference (ctrl+left mouse in vscode) and look at the code\ni find some function call in the third party module that looks very unrelated to the problem\ni add import pdb to the module, and a pdb.set_trace() before that function call\ni run the program again, and it stops at the breakpoint\nusing n,r,u,d i try to navigate closer to the source of the error\ni eventually find some error raise condition in some other module, where some property of a certain variable is checked. the variable itself is defined some levels up in the stack\nre-running the program and stopping at the same breakpoint as before, i try to navigate to the point where the variable is set. I don't know on which level of the stack it is set, so i miss it sometimes. I set intermediate breakpoints to save me some work when re-running\ni finally find the actual cause of the error. I can check out the workspace and eventually fix the error.\ni go through all the modules and remove the import pdb and the pdb.set_trace\n\nThanks for any suggestions","AnswerCount":2,"Available Count":2,"Score":0.0996679946,"is_accepted":false,"ViewCount":104,"Q_Id":60590748,"Users Score":1,"Answer":"are you using an IDE, not fully clear in your question?\nthey tend to have graphic ways of setting breakpoints and stepping,\nand it saves the hassle of changing the source.\nnot going into ide opinions, but examples of ide's with debuggers are spyder, thonny and others.\nyou can also run the debugger via commandline to avoid changing source, but I don't think that's the way to go if you are looking to simplify the cognotive load.","Q_Score":0,"Tags":"python,debugging,workflow,pdb","A_Id":60592011,"CreationDate":"2020-03-08T18:32:00.000","Title":"How does a good python debugging workflow look like?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"My latest python debugging workflow appears extremely slow to me, and little satifying. How can I improve?\nSetting: I work with some third-party python packages from github.\nWorkflow:\n\nrun into error after entering some command to the terminal (Ubuntu WSL, python 3.7)\nread terminal error message output, most likely the first or last one is helpful \nfrom the last message i take the code reference (ctrl+left mouse in vscode) and look at the code\ni find some function call in the third party module that looks very unrelated to the problem\ni add import pdb to the module, and a pdb.set_trace() before that function call\ni run the program again, and it stops at the breakpoint\nusing n,r,u,d i try to navigate closer to the source of the error\ni eventually find some error raise condition in some other module, where some property of a certain variable is checked. the variable itself is defined some levels up in the stack\nre-running the program and stopping at the same breakpoint as before, i try to navigate to the point where the variable is set. I don't know on which level of the stack it is set, so i miss it sometimes. I set intermediate breakpoints to save me some work when re-running\ni finally find the actual cause of the error. I can check out the workspace and eventually fix the error.\ni go through all the modules and remove the import pdb and the pdb.set_trace\n\nThanks for any suggestions","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":104,"Q_Id":60590748,"Users Score":0,"Answer":"Yes these things you have to do and in extra you can do include logging everywhere as applicable to get exact point where it got occurred.","Q_Score":0,"Tags":"python,debugging,workflow,pdb","A_Id":60591076,"CreationDate":"2020-03-08T18:32:00.000","Title":"How does a good python debugging workflow look like?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm having trouble getting my Azure Function (python, timer trigger) to work in a docker container. Outside of the docker container, everything works just fine. But as soon as I start my container, I get an error saying: \n\nfail: Host.Startup[515] A host error has occurred\n  System.InvalidOperationException: Unable to find an Azure Storage connection string to use for this binding.\n\nMy connection string is defined in my local.settings.json. I have no clue as to why this isn't working in the docker container, has anyone dealt with this? I appreciate any direction, thank you.\nEdit: Just a clarification, this is happening on my local machine. I have not deployed yet.","AnswerCount":3,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":906,"Q_Id":60610206,"Users Score":0,"Answer":"The explanation is in this github issue.\nBasically local.settings.json is only used by the local CLI, it's totally ignored by the runtime","Q_Score":5,"Tags":"python,azure,docker,azure-functions","A_Id":62175869,"CreationDate":"2020-03-10T00:48:00.000","Title":"Azure Function Python docker container: Unable to find an Azure Storage connection string to use for this binding","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm having trouble getting my Azure Function (python, timer trigger) to work in a docker container. Outside of the docker container, everything works just fine. But as soon as I start my container, I get an error saying: \n\nfail: Host.Startup[515] A host error has occurred\n  System.InvalidOperationException: Unable to find an Azure Storage connection string to use for this binding.\n\nMy connection string is defined in my local.settings.json. I have no clue as to why this isn't working in the docker container, has anyone dealt with this? I appreciate any direction, thank you.\nEdit: Just a clarification, this is happening on my local machine. I have not deployed yet.","AnswerCount":3,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":906,"Q_Id":60610206,"Users Score":6,"Answer":"As I said before, I defined my connection string in my local.settings.json. I ended up accessing the file system of the container, and verified that my local.settings.json was in fact in there. I ended up adding my connection string as an env variable in my docker file (AzureWebJobsStorage={YOURCONNNECTIONSTRINGHERE}) and got it working. Hopefully this helps someone who comes across this issue.","Q_Score":5,"Tags":"python,azure,docker,azure-functions","A_Id":60623147,"CreationDate":"2020-03-10T00:48:00.000","Title":"Azure Function Python docker container: Unable to find an Azure Storage connection string to use for this binding","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to pull data from an external API and dump it on S3 . I was thinking on writing and Airflow Operator rest-to-s3.py which would pull in data from external Rest API .\nMy concerns are :\n\nThis would be a long running task , how do i keep track of failures ?\nIs there a better alternative than writing an operator ?\nIs it advisable to do a task that would probably run for a couple of hours and wait on it ?\n\nI am fairly new to Airflow so it would be helpful.","AnswerCount":1,"Available Count":1,"Score":0.761594156,"is_accepted":false,"ViewCount":2262,"Q_Id":60645797,"Users Score":5,"Answer":"Errors - one of the benefits of using a tool like airflow is error tracking. Any failed task is subject to rerun (based on configuration) will persist its state in task history etc..\nAlso, you can branch based on the task status to decide if you want to report error e.g. to email\nAn operator sounds like a valid option, another option is the built-in PythonOperator and writing a python function.\nLong-running tasks are problematic with any design and tool. You better break it down to small tasks (and maybe parallelize their execution to reduce the run time?) Does the API take long time to respond? Or do you send many calls? maybe split based on the resulting s3 files? i.e. each file is a different DAG\/branch?","Q_Score":0,"Tags":"python,airflow-scheduler,airflow","A_Id":60651388,"CreationDate":"2020-03-11T23:42:00.000","Title":"Airflow Operator to pull data from external Rest API","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have python3.7.2 and idle installed on my mac, both of them came from the official installation package, run without problem for months, until recently I changed my terminal shell to zsh and also installed another version of python when homebrew is trying to have it as a dependency.\nThen today any .py file cannot be opened by the idle app, I uninstalled the homebrew version of python, removed the frameworks and the links in \/usr\/local\/bin, but the idle app still cannot be opened. Although the app version cannot be opened, it can be opened by \"idle3\" in my command line. What's more the python launcher works just fine.\nThen I removed all the versions of python3 installed, used app cleaner to clean the saved state stuff and cleaned all the links used by python3 in \/usr\/local\/bin. Later I installed the python3.7.7 and idle using official .pkg installer. Still idle cannot be opened by double clicking on it. But this time things get even worse, the idle can be opened indirectly sometimes at a nearly random probability if I try to double click on .py files. And even python launcher cannot open .py files in terminal. Now I have no idea how things are going. Can anyone help to analyze how this kind of weird problem occurred?","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":10905,"Q_Id":60648250,"Users Score":0,"Answer":"Control-Click on the Python file and open with a different version of Idle via \"Open With\".","Q_Score":2,"Tags":"python,macos,python-idle","A_Id":67995588,"CreationDate":"2020-03-12T05:46:00.000","Title":"Cannot open idle on Mac","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm developing plugin Nrpe in Python.\nWhen i try to execute my code it works well on my machine. But when the NRPE execute it, an error occurs : 'No Module named pycurl'\nI'm working on CentOs6.10 with Python 3.4 and i've installed pycurl with easy-install, the path to pycurl.py is \/usr\/lib\/python3.4\/site-packages\/\/usr\/lib\/python3.4\/site-packages\/pycurl.py\nAnd my PYTHONPATH = ['\/usr\/local\/bin', '\/usr\/lib64\/python34.zip', '\/usr\/lib64\/python3.4', '\/usr\/lib64\/python3.4\/plat-linux', '\/usr\/lib64\/python3.4\/lib-dynload', '\/usr\/lib64\/python3.4\/site-packages', '\/usr\/lib\/python3.4\/site-packages']\nI hope somebody could help me ?\nThanks !","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":55,"Q_Id":60656331,"Users Score":0,"Answer":"You probably need something like:\npython3 -m pip install pycurl\nYou may want to use: python3 -m pip install --user pycurl\nor a virtual environment.\npycurl doesn't come with python.  You have to install it with pip from pypi.","Q_Score":0,"Tags":"python,linux,centos6,nrpe,centreon-api","A_Id":60659262,"CreationDate":"2020-03-12T14:36:00.000","Title":"Why Python library import doesn't work via NRPE","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm using Windows10 and wants to run my python script by cmd\nThe command:\npython file.py\nreturn the message: \npython: can't open file 'file.py': [Errno 2] No such file or directory\nbut when I run \n python C:\\Python37\\projects\\file.py\nit's run properly\nalso, I added  C:\\Python37\\projects to the PATH, but it doesn't help","AnswerCount":4,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":14545,"Q_Id":60682364,"Users Score":0,"Answer":"Open your script in another code editor like VS and check extension. It usually keeps txt behind py and that is why you get an error. Or in Options, if you use Windows, Hide extensions for known file types.","Q_Score":0,"Tags":"python","A_Id":71170792,"CreationDate":"2020-03-14T11:46:00.000","Title":"Can't open file 'file.py': [Errno 2] No such file or directory","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm using Windows10 and wants to run my python script by cmd\nThe command:\npython file.py\nreturn the message: \npython: can't open file 'file.py': [Errno 2] No such file or directory\nbut when I run \n python C:\\Python37\\projects\\file.py\nit's run properly\nalso, I added  C:\\Python37\\projects to the PATH, but it doesn't help","AnswerCount":4,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":14545,"Q_Id":60682364,"Users Score":0,"Answer":"Check out the environment you have done your installation. Then call the path of your  directory rightly.\n\ncd C:\\Python37\\projects\n\n\npython file.py","Q_Score":0,"Tags":"python","A_Id":71456835,"CreationDate":"2020-03-14T11:46:00.000","Title":"Can't open file 'file.py': [Errno 2] No such file or directory","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"FFmpeg is installed in C:\\FFmpeg, and I put C:\\FFmpeg\\bin in the path. Does anyone know how to fix?\nThanks!","AnswerCount":1,"Available Count":1,"Score":-0.1973753202,"is_accepted":false,"ViewCount":2107,"Q_Id":60693223,"Users Score":-1,"Answer":"You added C:\\FFmpeg\\bin\\ffmpeg.exe to your path, instead, you need to add only the directory:\nC:\\FFmpeg\\bin\\","Q_Score":0,"Tags":"python,ffmpeg,path","A_Id":60694382,"CreationDate":"2020-03-15T13:08:00.000","Title":"FFmpeg is in Path, but running in the CMD results in \"FFmpeg not recognized as internal or external command\"","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I've read the Airflow documatation and I realized the backfill command will run my dags for each day of the date range that I provided. But is there a way to run my dags once per month using backfill? E.g. I provide the range 2020-01-01 to 2020-12-01 and I need to run once on January, once on February, and so.\nThanks for your help!","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":150,"Q_Id":60730551,"Users Score":1,"Answer":"backfill will rerun failed previous runs of a specified dag given its dag_id.\nIt will not run for each day unless your dag identified by dag_id is run each day.\nIf the dag identified by dag_id is run once eevry month, backfill will follow that frequency.\nA dag can easily be scheduled to run every day using a cron.","Q_Score":0,"Tags":"python,airflow","A_Id":60731159,"CreationDate":"2020-03-17T21:35:00.000","Title":"Airflow - Run backfill command month by month","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am installing kaldi in ubuntu 18.04. python2.7 is one of the dependencies to install kaldi. I have installed python2.7 by sudo apt-get install pytho2.7. Then to check the prerequisites run\nextras\/check_dependencies.sh. The result showing - \"python2.7 is installed, but the python2 binary does not exit. Creating a symlink and adding this to tools\/env.sh\"\nWhat is the next step to do?","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":787,"Q_Id":60769739,"Users Score":0,"Answer":"i just input 'ln -fs \/usr\/bin\/python2.7'","Q_Score":2,"Tags":"python-2.7,binary,symlink,kaldi","A_Id":69186659,"CreationDate":"2020-03-20T06:52:00.000","Title":"kaldi python2 binary issue","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a flask app that has one route and nothing complex going on, running in a docker container. I cannot for the life of me get print statements to show up in the logs (docker-compose logs -f <containername>). So far, I have tried various answers that supposedly have fixed this problem for others including:\n\nCalling print(\"test\", flush=True)\nSetting PYTHONUNBUFFERED=1 and verifying it is set in the actual container with echo\nSetting PYTHONUNBUFFERED=0\nRunning python with the -u flag\nUsing the logging module (logger.warning, logger.info, etc)\n\nSo far nothing has worked. The flask app is starting perfectly fine, but no output from my print statements is shown. I have sanity checked that i'm editing the correct file by adding random syntax errors and watching the app brick itself. I'm using python 3.8 and docker-compose 2","AnswerCount":3,"Available Count":1,"Score":0.0665680765,"is_accepted":false,"ViewCount":2316,"Q_Id":60773195,"Users Score":1,"Answer":"I found this question while looking for answers to a similar problem. I was running a flask app in a conda environment in a container and wasn't getting any log output even though the flask app itself was working fine. I added the following lines to my Dockerfile and it starting logging as expected -\nENV PYTHONUNBUFFERED=1\nRUN echo \"source activate my_env\" > ~\/.bashrc\nENV PATH \/opt\/conda\/envs\/my_env\/bin:$PATH\nCMD [\"python\", \"api.py\"]","Q_Score":1,"Tags":"python,docker,flask","A_Id":64772818,"CreationDate":"2020-03-20T11:23:00.000","Title":"Docker-compose flask app not printing output from 'print'","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I would like to determine which schedulers to trigger depending on the branch name, from inside the build factory - if that's possible. \nEssentially I have a builder that is doing all the common build steps to compile package etc, and then has a bunch of trigger steps that trigger a bunch of tests (via triggerable schedulers).\nHowever, I would like to configure the type of tests that get started (eg which schedulers are triggered) to depend on the branch name. So far I've tried to add the change_filter arg to my Triggerable scheduler, but it seems that it doesn't accept that argument. I guess that makes sense because it supposed to be Triggered, so maybe it doesn't care about using a change filter. That seems a bit strange though because Dependent schedulers do accept this kwarg. \nSo far the correct way to set this up is not clear to me.\nI guess my questions are really: \n\nIs there a way to use renderables \/ properties to decide which schedulers to trigger (based on the branch name for example)?\nIs there a better way to do this? Perhaps create separate schedulers for the build that apply the change filter I need and have a build factory that triggers the correct tests, but that's not very DRY.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":80,"Q_Id":60779621,"Users Score":1,"Answer":"I came back to leave this here in case it might help someone with a tricky buildbot setup.\nI solved this by making all of the dependent schedulers (for specific types of tests) into triggerable schedulers. Then I created main build schedulers for each subset of tests, each with a change filter and regex for the branches that should undergo that subset of tests. Finally, I created the buildfactory for each main scheduler by passing it only the triggerable schedulers for the test that that specific type of main scheduler should run. \nFor my current use case, this works great!","Q_Score":1,"Tags":"python-3.x,buildbot","A_Id":61101334,"CreationDate":"2020-03-20T18:19:00.000","Title":"Can a Triggerable Scheduler use a change filter, or can a Trigger build step be conditional on a property?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Hi so I'm new with running an open source project. Currently, I want to let other people contribute to my project, but I'm running into a problem right now. How would I share my environment variables which other users to make sure that their app runs locally. Is there a way to have contributors run my project locally without having all of their environment variables configured? I thought of having the person make their own environment variables, but since I have quite a bit of environment variables, I would like to avoid that. \nNote: I'm running a Flask App for my backend.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":164,"Q_Id":60807171,"Users Score":1,"Answer":"I generally include a \"run\" script, which is in charge of:\n\nsetting the right environment variables\ncheck the PATH for execution environment dependencies (making sure you have the right minimum version of some executable required to run your project)\nrunning the actual project.","Q_Score":3,"Tags":"python,flask,github,backend","A_Id":60808413,"CreationDate":"2020-03-23T02:18:00.000","Title":"How to share my environment variables with open source projects?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I executed an AWS Glue Job via API Gateway to start the job run. The job run is successful. But the result of the Script (print of a result) has not gotten through the execution. Only job run ID comes as the response. Is there any way to get the result of the job through an API?","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":253,"Q_Id":60825670,"Users Score":1,"Answer":"For glue anything you print or log goes into cloud watch\nYou have an option of adding a handler in your logger that writes to a stream and push that stream to a file in s3. Or better yet, create a StringIO object , store your result to it and then send that to s3","Q_Score":0,"Tags":"python-3.x,amazon-web-services,aws-api-gateway,aws-glue","A_Id":60843757,"CreationDate":"2020-03-24T05:59:00.000","Title":"How to get results of AWS Glue Job when executing via API?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am new to python\/pycharm and AWS SAM applications. My company has created a few AWS SAM apps and they have worked previously on my machine. Now I am unable to get even the example hello world AWS SAM solution to run on my machine. I'm not sure if this is a docker or pycharm issue. When I try to debug the application, this is the error I receive:\nFetching lambci\/lambda:python3.8 Docker container image...............\nMounting C:\\Dev\\git\\ULServices\\TestRun.aws-sam\\build\\HelloWorldFunction as \/var\/task:ro,delegated inside runtime container\n\/var\/lang\/bin\/python3.8: can't open file '\/tmp\/lambci_debug_files\/pydevd.py': [Errno 1] Operation not permitted\nI am on Windows 10 and have the latest version of Docker\/PyCharm\/AWS SAM CLI","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":479,"Q_Id":60840846,"Users Score":1,"Answer":"This was a Docker issue. Release 2.2.0.5 on Apr 2, 2020 fixed the issue. From their release notes: \nFixed a bug where opening a read-only file would fail with an Operation not permitted error. Fixes docker\/for-win#6016 and docker\/for-win#6017.\nI have turned off automatic updates since this is what initially caused the issue for me since it was working in a previous version.","Q_Score":2,"Tags":"python,docker,pycharm,aws-sam","A_Id":60995639,"CreationDate":"2020-03-24T23:23:00.000","Title":"Not able to debug AWS SAM hello world application","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I tried to install Anaconda 2020.02 under Windows 10 and it hangs during the installation process at the point when it tries to extract \u201canaconda-2020.02-py37_0.tar.bz2\u201d. \nThe only peculiarity of my machine is that I have Windows Subsystem for Linux activated (on which I installed Ubuntu with it\u2019s own copy of Anaconda). \nAny idea if this could be the problem?\nThanks","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":653,"Q_Id":60849811,"Users Score":0,"Answer":"I waited for a long time until the installation passed that point that looked like it hung. It doesn't really hang. It just takes a really long time.","Q_Score":2,"Tags":"python,anaconda,windows-subsystem-for-linux","A_Id":64019781,"CreationDate":"2020-03-25T13:25:00.000","Title":"Installation of Anaconda 2020.02 fails under Windows with activated WSL","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I use multiprocessing.Process in Win10 Python to create multiple sub-processes to run a function in parallel, where each sub-process waits for the data from main-process the complete the whole task.\nI know that using multiprocessing.Queue() can realize the communication between main process and sub-process. However, it doesn't specify which sub-process can get the data. It happens that sub-process-7 gets the data, which I intend to send to sub-process-2. Is there a way to specify sending data to a specific sub-process?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":75,"Q_Id":60856854,"Users Score":0,"Answer":"If you want to control which process should get a message use dedicated queues. Create a queue queue2 and pass that to sub-process-2.","Q_Score":0,"Tags":"python","A_Id":60856950,"CreationDate":"2020-03-25T20:24:00.000","Title":"How to send data from main process to a specific sub-process in Python Multiprocess","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Because of the size of the installed pip packages , I moved the ~\/.local\/lib\/python3.6 directory to another partition and then made a symlink(a.k.a shortcut for windows users) to it , and that had been worked fine.\nBut recently I installed a newer linux distribution which has python3.8 pre-installed and I want to re-use those python3.6 packages(since the minor version is the same) to obviate the need of re-installing them.(almost 3.5 GB)\nI made a symlink (~\/.local\/lib\/python3.8\/ which is the exact name that pip creates itself) to \/path\/to\/external\/lib\/python3.6 , but now python shell is unable to recognize those packages.\nAny ideas?\nDo I need to re-install them?\nThanks.","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":30,"Q_Id":60882650,"Users Score":1,"Answer":"These projects have to be reinstalled. There is no compatibility guarantee between minor versions (or major obviously), only between maintenance versions.","Q_Score":1,"Tags":"python-3.x,pip","A_Id":60882859,"CreationDate":"2020-03-27T08:50:00.000","Title":"Using installed pip packages in a newer release of Python3","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"My worker is run with:\ncelery worker -A workerTasks -n Worker%h --concurrency=1 --loglevel=info -Q $QUEUE_NAME -f $WORKER_LOG_FILE --pidfile=\/logs\/worker_pid%h.pid\nI'm wondering if I can make a python\/celery call within the process to find which queue(s) this worker is \"subscribed\" to?\n(I do NOT want to find the value of $QUEUE_NAME directly)","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":95,"Q_Id":60888115,"Users Score":0,"Answer":"celery -A workerTasks inspect active_queues -d <worker name>, where worker name is the name of that particular node. If you omit -w <worker name> each node will send you report about which queue it is subscribed to.","Q_Score":1,"Tags":"python,django,celery","A_Id":60890077,"CreationDate":"2020-03-27T14:33:00.000","Title":"How to get list of subscribed queue names in Celery\/Django?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"First of all, im really new at Machine Learning and Anaconda\nRecently I\u00b4ve Installed Anaconda for MachineLearning but now when i try to run my old scripts from my terminal, all my packages are not there, even pip or numpy or pygame y don\u00b4t know how to change to my old python directory, I really don\u00b4t know how this works, please help me. I\u00b4m on MacOs Catalina","AnswerCount":2,"Available Count":1,"Score":0.2913126125,"is_accepted":false,"ViewCount":69,"Q_Id":60897172,"Users Score":3,"Answer":"First of all, Python 3 is integrated in macOS X Catalina, just type python3. For pip, you can use pip3. Personally, I would prefer native over conda when using mac.\nNext, you need to get all the modules up from your previous machine by pip freeze > requirements.txt or pip3 freeze > requirements.txt\nIf you have the list already, either it's from your previous machine or from a GitHub project repo, just install it via pip3 in your terminal: pip3 install -r requirements.txt\nIf not, you have to manually install via pip3, for example: pip3 install pygame etc.\nAfter all dependencies are done installed, just run your .py file as usual.\nLast, but not least, welcome to the macOS X family!","Q_Score":0,"Tags":"python,macos,terminal,anaconda","A_Id":60902188,"CreationDate":"2020-03-28T04:17:00.000","Title":"Change which python im using in terminal MacOs Catalina","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I opened a virtual enviroment and accidentally closed the command prompt window in Windows. \nI wanted to delete the virtual enviroment folder, but when I tried, it says program is running which still uses the files. \nSo how do I get back to the virtual enviroment, without opening a new one?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":17,"Q_Id":60937113,"Users Score":0,"Answer":"Just kill the daemon-process by command in Ctrl+Alt+Del interface. Then you can delete a folder","Q_Score":0,"Tags":"python,windows,virtualenv","A_Id":60937164,"CreationDate":"2020-03-30T18:29:00.000","Title":"How to accesss a python virtual enviroment when the command prompt is accidentally closed?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"It's past time for me to move from my custom scientific workflow management (python) to some group effort.  In brief, my workflow involves long running (days) processes with a large number of shared parameters.  As a dependency graph, nodes are tasks that produce output or do some other work. That seems fairly universal in workflow tools.\nHowever, key to my needs is that each task is defined by the parameters it requires.   Tasks are instantiated with respect to the state of those parameters and all parameters of its dependencies.  Thus if a task has completed its job according to a given parameter state, it is complete and not rerun.  This parameter state is NOT the global parameter state but only what is relevant to that part of the DAG. This reliance on parameter state rather than time completed appears to be the essential difference between my needs and existing tools (at least what I have gathered from a quick look at Luigi and Airflow).  Time completed might be one such parameter, but in general it is not the time that determines a (re)run of the DAG, but whether the parameter state is congruent with the parameter state of the calling task. There are non-trivial issues (to me) with 'parameter explosion' and the relationship to parameter state and the DAG, but those are not my question here.\nMy question -- which existing python tool would more readily allow defining 'complete' with respect to this parameter state?  It's been suggested that Luigi is compatible with my needs by writing a custom complete method that would compare the metadata of built data ('targets') with the needed parameter state.\nHow about Airflow? I don't see any mention of this issue but have only briefly perused the docs.  Since adding this functionality is a significant effort that takes away from my 'scientific' work, I would like to start out with the better tool. Airflow definitely has momentum but my needs may be too far from its purpose.\nDefining the complete parameter state is needed for two reasons -- 1) with complex, long running tasks, I can't just re-run the DAG every time I change some parameter in the very large global parameter state, and 2) I need to know how the intermediate and final results have been produced for scientific and data integrity reasons.","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":208,"Q_Id":60938401,"Users Score":1,"Answer":"I looked further into Luigi and Airflow and as far as I could discern neither of these is suitable for modification for my needs.  The primary incompatibility is that these tools are fundamentally based on predetermined DAGs\/workflows.  My existing framework operates on instantiated and fully specified DAGs that are discovered at run-time rather than concisely described externally -- necessary because knowing whether each task is complete, for a given request, is dependent on many combinations of parameter values that define the output of that task and the utilized output of all upstream tasks. By instantiated, I mean the 'intermediate' results of individual runs each described by the full parameter state (variable values) necessary to reproduce (withstanding any stochastic element) identical output from that task.\nSo a 'Scheduler' that operates on a DAG ahead of time is not useful.\nIn general, most existing workflow frameworks, at least in python, that I've glanced at appear more to be designed to automate many relatively simple tasks in an easily scalable and robust manner with parallelization, with little emphasis put on the incremental building up of more complex analyses with results that must be reused when possible designed to link complex and expensive computational tasks the output of which may likely in turn be used as input for an additional unforeseen analysis.\nI just discovered the 'Prefect' workflow this morning, and am intrigued to learn more -- at least it is clearly well funded ;-).  My initial sense is that it may be less reliant on pre-scheduling and thus more fluid and more readily adapted to my needs, but that's just a hunch.  In many ways some of my more complex 'single' tasks might be well suited to wrap an entire Prefect Flow if they played nicely together.  It seems my needs are on the far end of the spectrum of deep complicated DAGs (I will not try to write mine out!) with never ending downstream additions. \nI'm going to look into Prefect and Luigi more closely and see what I can borrow to make my framework more robust and less baroque.  Or maybe I can add a layer of full data description to Prefect...\nUPDATE -- discussing with Prefect folks, clear that I need to start with the underlying Dask and see if it is flexible enough -- perhaps using Dask delayed or futures.  Clearly Dask is extraordinary.  Graphchain built on top of Dask is a move in the right direction by facilitating permanent storage of 'intermediate' output computed over a dependency 'chain' identified by hash of code base and parameters.  Pretty close to what I need, though with more explicit handling of those parameters that deterministically define the outputs.","Q_Score":2,"Tags":"python,workflow,airflow,scientific-computing,luigi","A_Id":61064713,"CreationDate":"2020-03-30T19:49:00.000","Title":"Recommended python scientific workflow management tool that defines dependency completeness on parameter state rather than time?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have looked at similar posts but could not find the solution to my problem.  I had installed mySQL 8.0 version using homebrew on MacOS but then needed to downgrade it to mySql 5.6. I uninstalled the 8.0 version completely and deleted any left over files.I then installed the 5.6.1 using the native mySQL dmg package for Mac. On running my python project I get the Library not loaded error for \/usr\/local\/opt\/mysql\/lib\/libmysqlclient.21.dylib referenced from the _mysql.cpython-36m-darwin.so. I am not sure why this location is getting referenced as I have only libmysqlclient.18.dylib on my system under a different folder usr\/local\/mysql\/lib . How can I fix the issue ?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":489,"Q_Id":60943218,"Users Score":0,"Answer":"My project with Python 3.6 was lookin for libmysqlclient.21.dylib.\nI installed brew install mysql-client. It installed mysql-client 8.0. it has libmysqlclient.21.dylib. Where as i wanted to use mysql@5.6.\nSo I copied the libmysqlclient.21.dylib from \/usr\/local\/Cellar\/mysql-client\/8.0.19\/lib to  \/usr\/local\/lib\/ \nsudo ln -s \/usr\/local\/Cellar\/mysql-client\/8.0.19\/lib\/libmysqlclient.21.dylib \/usr\/local\/lib\/libmysqlclient.21.dylib","Q_Score":0,"Tags":"mysql,mysql-python","A_Id":61588197,"CreationDate":"2020-03-31T03:56:00.000","Title":"Library not loaded: \/usr\/local\/opt\/mysql\/lib\/libmysqlclient.21.dylib error when it does not exist","Data Science and Machine Learning":0,"Database and SQL":1,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Im using ProcessPoolExecutor to execute external command is there any way to capture stderr when the process is finished (similar to subprocess)? Im capturing executor.submit() future result but that returns 0 or 1.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":29,"Q_Id":60985394,"Users Score":0,"Answer":"This might not be an answer but it is of that direction and far too long for a comment, so here goes. \nI would say no to that. You might be able to achieve this by tinkering with stderr file descriptors, redirecting that to a stream of your own and returning this as the worker result but I am wondering if ProcessPoolExecutor is suitable for your task - of course not knowing what it is. \nA subprocess created by a process pool does not finish like a subprocess created by yourself. It stays alive waiting for more work to arrive until you close the pool. If your worker produces stdout or stderr, they go to the same place where your main process directs its stdout and stderr. \nYour workers will also process many different tasks. If your pool size is four and you submit ten tasks, how do you then decipher from a plain stderr capture which task created what message?\nI have a hunch this needs to be redesigned. You would be able to raise exceptions in your workers and then later capture those from your future objects.  Or it might be that your task is something where a pool is just not suitable. If subprocesses do what you want them to do, why not use them instead?  \nPools are good for parallelising repetitive tasks that return and receive modest amount of data (implemented as queues that are not miracle performers), with a standard interface and standardised output\/error handling.  Pools simplify your code by providing the routine part. If your subtasks require different inputs, their outputs and error handling vary greatly or there is a lot of data to be transmitted, you might be better off by building the parallel processing part yourself.","Q_Score":1,"Tags":"python","A_Id":60988387,"CreationDate":"2020-04-02T06:25:00.000","Title":"Capture stderr in ProcessPoolExecutor","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I wrote a python script that accesses system features which require root privileges. \nThis \"master\" script is configured by running another Python script file, \"config.py\", using exec, that the user of my script would write and which configures some state variables in my script.\nThe master script file is root-owned while the config file is user owned (since my script users would want to modify this file).\nObviously this is not ideal, since the users of my script could run root-level commands in the config script. Is there a way to run the config file in user-level even if the master file was run in root?","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":133,"Q_Id":60993916,"Users Score":0,"Answer":"Since it\u2019s a config file, you might be better off making it something non-executable like a plain ini \/ yaml etc. I\u2019m assuming you want to include it to access some constants. Sometimes it requires a little more work to set up, but ultimately, if the only code that runs is yours, you can be safe(er).","Q_Score":0,"Tags":"python,linux,scripting,sudo","A_Id":61003260,"CreationDate":"2020-04-02T14:26:00.000","Title":"Run python file in sudo but config file in user space","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a executable python script that I want to run using apache. A simple print('hello') works fine, however it fails if the script imports some package. In this case it fails at 'import pandas'. \nI'm using python version 3.5.2\nI have installed pandas with pip3 install pandas, and the installation is successful. If I try again, I get:\nRequirement already satisfied: six>=1.5 in \/usr\/lib\/python3\/dist-packages (from python-dateutil>=2.5.0->pandas) (1.10.0)\nI have tried to start the script with both #! \/usr\/bin\/python and #! \/usr\/bin\/env python\nWhy could it be that it doesn't work? Is there some sort of step by step guide to manage this?","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":224,"Q_Id":60994419,"Users Score":1,"Answer":"These two optiones worked for me:\nsudo apt-get install python3-pandas\nor\nsudo -H python3 -m pip install pandas","Q_Score":1,"Tags":"python,apache,server","A_Id":61014094,"CreationDate":"2020-04-02T14:50:00.000","Title":"Python\/Apache\/Server - Can't import modules","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Jenkins setup is on Ubuntu.\nLocal: Created a virtual environment using python 3.6, running tests through command line using pythom -m pytest - .\/{test.py} which is successful\nJenkins job:\nIn the Build > Shell script, creating a virtual environment the same way done locally and running the commands.\npython3.6 -m venv jenkins-venv\nsource ${WORKSPACE}\/jenkins-venv\/bin\/activate \npip install --no-cache-dir -r ${WORKSPACE}\/project\/requirements.txt\npython -m pytest -v ${WORKSPACE}\/project\/test_day1.py \nError:\n ERROR collecting scripts\/\nImportError while importing test module '\/var\/lib\/jenkins\/workspace\/job_name\/project\/test_Login.py'.\nHint: make sure your test modules\/packages have valid Python names.\nModuleNotFoundError: No module named","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":619,"Q_Id":60994459,"Users Score":0,"Answer":"This happens if your PATH variable includes that module's directory on your machine but not on Jenkins.","Q_Score":0,"Tags":"python,jenkins","A_Id":60994553,"CreationDate":"2020-04-02T14:52:00.000","Title":"Python tests run locally on ubuntu but fails when run through Jenkins with error \"ImportError while importing test module '\/var\/lib\/jenkins\/workspace\"","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am writing a complete application intended to be compiled to .exe (via Py2EXE). I would love to use the DAO object for working with an Access database. I would like to have as little dependencies as possible (for the user - no office install, etc).\nMost of the sources I have reviewed claim that the bitness of the Engine\/Driver\/Office Installation, must all align. This confuses me as to what the user will require on their machine if i compile my working code. \nWill they just need Access Run-time for the bitness of the engine I develop the app in?\nThank you","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":162,"Q_Id":61005720,"Users Score":0,"Answer":"I wouldn't recommend Acess with Python.\nPython and Access are two completely different \"worlds\", Python does have the necessary drivers to \"speak\" to Access but is not a good match especially when it has built in support for SQLite and i reckon far better support for other Database engines.\nI am an Access expert and i do Python but i wouldn't mix them unless its for convenience like using the report engine of Access.","Q_Score":0,"Tags":"python,windows,ms-access,dao","A_Id":61059022,"CreationDate":"2020-04-03T05:43:00.000","Title":"What is the easiest way to use DAO Engine (Access) in Python for a complete application?","Data Science and Machine Learning":0,"Database and SQL":1,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"How to auto-run python script made by me when the system is booted on jetson nano?","AnswerCount":3,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":4006,"Q_Id":61031032,"Users Score":0,"Answer":"Step 1: Create a shell file.\nsudo nano \/usr\/local\/bin\/startup.sh: Type this on the terminal. A new sh file is created. This file consists of the python file that is to be executed. I gave the name startup.sh. It can be any name XYZ.sh\n#! \/bin\/sh: This is called the shebang. This would execute our script using a Bourne shell. This tells the system that the commands in this file should be fed to the interpreter.\nsleep 10: This pauses a script for a certain amount of time. He re we pause it for 10 seconds.\nIn the next line, we insert the code that we use to run the program on the terminal.\nOPENBLAS_CORETYPE=ARMV8 \/usr\/bin\/python3 path\/of\/the\/python\/code.py\nIt looks like this:\n#! \/bin\/sh\nsleep 10\nOPENBLAS_CORETYPE=ARMV8 \/usr\/bin\/python3 \/home\/sooraj\/Downloads\/incabin-monitoring-system-main\/netstreamfeb17.py\nNow we close the file using Ctrl+X. and save it.\nStep 2: Create a service file\nsudo nano \/etc\/systemd\/system\/startup.service\nThings to write inside it.\n[Unit]\nDescription = INTU_IPC start-uo specific script\n[Service]\nType= idle\nExecStartPre = \/bin\/sleep 10\nExecStart = \/usr\/local\/bin\/startup.sh\nUser=sooraj# write your user name here\n[Install]\nWantedBy = multi-user.target\nNow we close the file using Ctrl+X. and save it.\nstep 3: Give permission.\nsudo chmod +x \/usr\/local\/bin\/startup.sh\nstep 4: enable, start and stop\nsudo systemctl enable startup.service\nsudo systemctl start startup.service\nsudo systemctl stop.service\nAfter starting, to view if it works, we can observe it in the terminal by\njournalctl -u startup.service -f\nIf we edit the service file for the next time, we need to reload it before enabling and starting.\nsudo systemctl daemon-reload\nsudo systemctl enable startup.service\nsudo systemctl start startup.service\nAdditional information.\nsystemctl is-enabled startup.service #checks if the service file is enabled.\nsystemctl is-failed startup.service #checks if the service file failed to start.\nsystemctl is-active startup.service #checks if the service file is active.\nsudo systemctl list-unit-files \u2014 type=service #display the list of service files.","Q_Score":0,"Tags":"python-3.x,nvidia-jetson,startupscript,nvidia-jetson-nano","A_Id":72109493,"CreationDate":"2020-04-04T16:17:00.000","Title":"Auto-run python script when system is booted on jetson nano","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I made a mess out of my self. \nI wanted to add python3.6 in my system so I decided to uninstall the existing one in my Ubuntu 19.10 . But now everytime I want to install something I get error like this:\n\ndpkg: error while cleaning up:\n   installed python3-virtualenv package post-installation script subprocess returned error exit \n   status 127\nErrors were encountered while processing:python3-virtualenv\nProcessing was halted because there were too many errors.\n  E: Sub-process \/usr\/bin\/dpkg returned an error code (1)\n\nI can't open my terminal by clicking on icon and I can't even install any apps from ubuntu sofware.Any suggestion to follow\nSystem\nUbunutu 19.10","AnswerCount":1,"Available Count":1,"Score":0.3799489623,"is_accepted":false,"ViewCount":4600,"Q_Id":61076632,"Users Score":2,"Answer":"I have found the answer. Just wrote the line in the terminal \n\nsudo apt install python3-minimal python3 --reinstall","Q_Score":1,"Tags":"python,python-3.x,linux,ubuntu","A_Id":61096937,"CreationDate":"2020-04-07T09:17:00.000","Title":"Errors were encountered while processing:","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm a pretty new dev in the docker world and at this point I really need help.\nI have a python script inside a docker container.  When python exits with sys.exit(-1) the docker container still exits with success and consequently mark success in airflow too, omitting real errors and trace-backs.\nHow can I exit from container with error ?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":400,"Q_Id":61081796,"Users Score":0,"Answer":"I know this question is old, but I just figured out the answer myself.\nFirst, remove any old images that airflow might be using. List them with docker images, and then remove with docker rmi <image_id>\nNow, in your code add a sys.exit(1) in a try\/except for the main part of the code that is getting called by the DAG.","Q_Score":4,"Tags":"python,docker,containers,airflow","A_Id":65431136,"CreationDate":"2020-04-07T14:00:00.000","Title":"Airflow Docker Operator returning sucess when python code inside fail","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I followed a udacity tutorial to download python and I'm having some trouble. I downloaded python and I can see that I have when I type in python --version in the terminal. It's version 3.8.2. When I type in python3 --version, I get: \/appData\/Local\/Microsoft\/WindowsApps\/python3: Permission Denied.\nWhy does python --version work but not python 3 --version? What permission is denied?","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":748,"Q_Id":61086459,"Users Score":1,"Answer":"It looks like this added two \"stubs\" called python.exe and python3.exe into the %USERPROFILE%\\AppData\\Local\\Microsoft\\WindowsApps folder, it's inserted before existing Python executable's entry in the PATH.\nMoving this entry below the correct Python folder (partially) corrected the issue.\nType manage app execution aliases into the Windows search prompt and disable the store versions of Python altogether.","Q_Score":0,"Tags":"python,python-3.x,terminal","A_Id":61086634,"CreationDate":"2020-04-07T18:01:00.000","Title":"Trouble finding python in terminal","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Our software stack currently requires python-rosdep 0.18.0-1, but his package has been upgraded to 0.19.0-1, and therefore removed 0.18.0-1.  In our jfrog artifactory repo I can still find 0.18.0-1 in the remote-cache, but I am not able force the version.  When I do sudo apt install python-rosdep=0.18.0-1, I got E: Version '0.18.0-1' for 'python-rosdep' was not found.  Searching for the package apt search python-rosdep gives me the newest version only.  Is there a way I can still install the older version cached in our jfrog artifactory repo?  Thanks!","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":480,"Q_Id":61090329,"Users Score":1,"Answer":"The behavior you got is expected as Remote Repository in Artifactory tries to mirror the original repository.\nYou have couple of options to resolve the package that is already cached although expired from the remote:\n\nCopy it to a local repository & pull from there.\nNot 100% sure about this one, but setting the remote repository\n\"offline\" may work as a quick workaround.","Q_Score":0,"Tags":"python,artifactory,apt,downgrade","A_Id":61121227,"CreationDate":"2020-04-07T22:22:00.000","Title":"Not able to apt install a package remote cached in Jfrog Artifactory after the it has been removed from the source","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm not sure about the difference between apply_async() and send_task() in Celery library in Python, specially when using Tasks pools.\nWhat I'm mainly looking for is having a centralized server with all tasks defined in there, and using some Redis queues, the other physical instances are able to publish\/send events to the different queues targetting different tasks using Pools, without the need to define all the list of the tasks in each publisher script to be able to use.\nI've looked into the documentation and didn't find much to answer my question actually.\nThanks in advance!","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":1540,"Q_Id":61096293,"Users Score":3,"Answer":"They both do the same thing (request particular task to be executed). However for apply_async() to work you need the definition of the task. send_task() is extremely convenient in the case you really do not want to distribute the code just so that you can trigger particular task (sure, you must use the same serialization, and know name of the task, but if you are codebase owner this is not an issue).","Q_Score":3,"Tags":"python,python-3.x,celery,celery-task","A_Id":61097959,"CreationDate":"2020-04-08T08:19:00.000","Title":"Difference between send_task() and apply_async()","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm making my first steps in macOS app development.\nI'm trying to write an app on Swift that would keep python interactive console open.\nSometimes I would like to send to python commands and return the results back to swift, but not closing python to keep all variables for the next command I will send.\nIs there any way to do that?\nAs far as I understand, I can't use the Process() because the input pipe automatically closes when I run the task.\nI probably need to use pseudo terminals with pty and tty, but I don't fully understand the idea and where to learn about it. (or, maybe, I'm wrong and there is another way)","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":115,"Q_Id":61099485,"Users Score":0,"Answer":"If you actually want to use python code from swift, I would strongly advise you to avoid using this method. It is very bug prone and potentially limiting and inefficient. You better use some wrapper of the python-c-api, or write some small server in python to receive requests from swift.\nIf you still want to do that, an easy way to go about it would be to use python itself to spawn python inside a pty:\npython -c \"import pty, sys; pty.spawn(sys.argv[1:])\" python\nThis will start a python console that reads and writes to stdio instead of of \/dev\/tty.","Q_Score":0,"Tags":"python,swift,macos,tty,pty","A_Id":62534243,"CreationDate":"2020-04-08T11:22:00.000","Title":"Run python interactive console as a subprocess in swift with sending commands and receiving results after launched","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I've got a video that needs to be rotated n degrees (not just 90 or 180 which I can do using ffmpeg but for instance 1 or 10). How can do this?\nI've googled and no such tools seem to be freely available.","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":34,"Q_Id":61104303,"Users Score":0,"Answer":"You can use the rotate filter.\nFor example rotate 10 degree.\nffmpeg.exe -i input.mp4 -vf 'rotate=10\/180*PI\/2' output.mp4\n\nOr you can use a dynamic degree.\n\nffprobe.exe -v quiet -show_entries format=duration -print_format json -i input.mp4 to get the video lenght as T.\nThen rotate it with ffmpeg.exe -i input.mp4 -vf 'rotate=t\/T*PI\/2' output.mp4","Q_Score":1,"Tags":"python,video","A_Id":61150942,"CreationDate":"2020-04-08T15:26:00.000","Title":"How to turn a video n degrees","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have been having a problem with opening programes with python. I've been using os.system(\"file\") and os.startfile(\"file\"), but the problem is, that it uses direction of the app, and when this code goes to the other computer, the direction is not the same, as on my computer. Is it possible to open an app without writing its direction just by a name?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":59,"Q_Id":61122859,"Users Score":1,"Answer":"Maybe subprocess.call is what you're looking for (assuming the path to the executable is in your global $PATH variable).","Q_Score":0,"Tags":"python,operating-system,direction","A_Id":61122972,"CreationDate":"2020-04-09T13:58:00.000","Title":"How to open an os app with python without direction?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I installed anaconda on a user account under username ubuntu on a linux server running Ubuntu.\nI then created new users in my ubuntu server, called let's say ubuntu1, ubuntu2, etc.\nWhen I login as ubuntu I can do:\nconda activate <env_name> and it will activate the python environment for the user called ubuntu.\nThe environment was installed under \/home\/ubuntu\/anaconda3.  I.e., in the user local directory.\nIs there a way to make this conda environment global for all users so when I login as a different user, let's say username ubuntu1, the conda activate works and the new user is also able to use the desired anaconda and python version?\nIMPORTANT NOTE: I do not want to re-install anaconda, or create a yml file of existing anaconda and then re-install it as admin.  I would want to just use the current configuration\/installation by making it widely available to the new users.","AnswerCount":1,"Available Count":1,"Score":0.3799489623,"is_accepted":false,"ViewCount":635,"Q_Id":61123009,"Users Score":2,"Answer":"What you can do is to set the appropriate permissions to your environment path from the existing user, and change the .bashrc file (or .profile, or whatever you use as init script in the shell) of the new user to have the conda binaries available in your $PATH.\nOf course, this may be a security risk for the user under which anaconda is installed to.","Q_Score":1,"Tags":"python,linux,ubuntu,anaconda","A_Id":61209159,"CreationDate":"2020-04-09T14:04:00.000","Title":"make local installation of anaconda available to all users w\/o having to install all again","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have an Google App Engine Standard (Python 3) application that I've secured behind Google IAP. This works great! But now I need a handful of web hook urls to be public, so other services can hit them, like SendGrid. Is there a solution to this that I am not seeing?","AnswerCount":1,"Available Count":1,"Score":0.3799489623,"is_accepted":false,"ViewCount":96,"Q_Id":61127248,"Users Score":2,"Answer":"As Ahmad suggested, the solution is to have a separate App Engine service that is publicly accessible.","Q_Score":1,"Tags":"google-app-engine,google-app-engine-python,google-iap","A_Id":61191098,"CreationDate":"2020-04-09T17:54:00.000","Title":"Is it possible to protect an App Engine application with IAP while having a few public URLs?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"This executable generation is on raspbian linux, on my raspberry-pi:\nInstall pyinstaller: (I had to try this several times, as I got the error \"http.client.RemoteDisconnected: Remote end closed connection without response\" but it suddenly worked):\n$ pip3 install pyinstaller \nIn directory with my tiny_test.py file:\n$ pyinstaller -F tiny_test.py\nThen, in the created dist folder, I tried to run the compiled executable:\n$ tiny_test\nThis gave the error:\n\"tiny_test: tiny_test: cannot execute binary file\"","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":673,"Q_Id":61131998,"Users Score":0,"Answer":"short answer:\n$ .\/tiny_test\nlong anser:\nCheck the executable file properties:\n$ file tiny_test\n\"tiny_test: ELF 32-bit LSB executable, ARM, EABI5 version 1 (SYSV), dynamically linked, interpreter \/lib\/ld-linux-armhf.so.3, for GNU\/Linux 3.2.0, BuildID[sha1]=ad32521ad141d04ca4fc066798301621367c7964, stripped\"\nLSB executable files need to be run like this:\n$ .\/tiny_test\nThis worked for me!","Q_Score":0,"Tags":"python,raspberry-pi,pyinstaller,executable","A_Id":61131999,"CreationDate":"2020-04-09T23:47:00.000","Title":"pyinstaller raspberry pi compiling, how to execute program from command line","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am using Windows 7 64 bit and when I attempt to run the executable installer for Python 3.8.2 I get an error stating that I need to install windows service pack 1 to continue. I already have windows service pack 1 installed on this drive, I've double checked and reinstalled it but this has not fixed the issue.\nThis is what's in the error log:\n\n[1B0C:1AAC][2020-04-10T05:16:05]i001: Burn v3.11.1.2318, Windows v6.1\n  (Build 7601: Service Pack 1), path:\n  C:\\Users\\Admin\\AppData\\Local\\Temp{4C6C4ED2-212B-4FA8-BD34-C5891FEA4006}.cr\\python-3.8.2-amd64.exe\n[1B0C:1AAC][2020-04-10T05:16:05]i000: Initializing string variable\n  'ActionLikeInstalling' to value 'Installing'\n[1B0C:1AAC][2020-04-10T05:16:05]i000: Initializing string variable\n  'ActionLikeInstallation' to value 'Setup'\n[1B0C:1AAC][2020-04-10T05:16:05]i000: Initializing string variable\n  'ShortVersion' to value '3.8'\n[1B0C:1AAC][2020-04-10T05:16:05]i000: Initializing numeric variable\n  'ShortVersionNoDot' to value '38'\n  [1B0C:1AAC][2020-04-10T05:16:05]i000: Initializing string variable\n  'WinVer' to value '3.8'\n[1B0C:1AAC][2020-04-10T05:16:05]i000: Initializing numeric variable\n  'WinVerNoDot' to value '38'\n[1B0C:1AAC][2020-04-10T05:16:05]i000: Initializing numeric variable\n  'InstallAllUsers' to value '0'\n[1B0C:1AAC][2020-04-10T05:16:05]i000: Initializing numeric variable\n  'InstallLauncherAllUsers' to value '1'\n[1B0C:1AAC][2020-04-10T05:16:05]i000: Initializing string variable\n  'TargetDir' to value ''\n[1B0C:1AAC][2020-04-10T05:16:05]i000: Initializing string variable\n  'DefaultAllUsersTargetDir' to value\n  '[ProgramFiles64Folder]Python[WinVerNoDot]'\n[1B0C:1AAC][2020-04-10T05:16:05]i000: Initializing string variable\n  'TargetPlatform' to value 'x64'\n[1B0C:1AAC][2020-04-10T05:16:05]i000: Initializing string variable\n  'DefaultJustForMeTargetDir' to  value\n  '[LocalAppDataFolder]Programs\\Python\\Python[WinVerNoDot]'\n[1B0C:1AAC][2020-04-10T05:16:05]i000: Initializing string variable\n  'OptionalFeaturesRegistryKey' to value\n  'Software\\Python\\PythonCore[WinVer]\\InstalledFeatures'\n[1B0C:1AAC][2020-04-10T05:16:05]i000: Initializing string variable\n  'TargetDirRegistryKey' to value\n  'Software\\Python\\PythonCore[WinVer]\\InstallPath'\n[1B0C:1AAC][2020-04-10T05:16:05]i000: Initializing string variable\n  'DefaultCustomTargetDir' to value ''\n[1B0C:1AAC][2020-04-10T05:16:05]i000: Initializing string variable\n  'InstallAllUsersState' to value 'enabled'\n[1B0C:1AAC][2020-04-10T05:16:05]i000: Initializing string variable\n  'InstallLauncherAllUsersState' to value 'enabled'\n[1B0C:1AAC][2020-04-10T05:16:05]i000: Initializing string variable\n  'CustomInstallLauncherAllUsersState' to value\n  '[InstallLauncherAllUsersState]'\n[1B0C:1AAC][2020-04-10T05:16:05]i000: Initializing string variable\n  'TargetDirState' to value 'enabled'\n[1B0C:1AAC][2020-04-10T05:16:05]i000: Initializing string variable\n  'CustomBrowseButtonState' to value 'enabled'\n[1B0C:1AAC][2020-04-10T05:16:05]i000: Initializing numeric variable\n  'Include_core' to value '1'\n[1B0C:1AAC][2020-04-10T05:16:05]i000: Initializing numeric variable\n  'Include_exe' to value '1'\n[1B0C:1AAC][2020-04-10T05:16:05]i000: Initializing numeric variable\n  'Include_dev' to value '1'\n[1B0C:1AAC][2020-04-10T05:16:05]i000: Initializing numeric variable\n  'Include_lib' to value '1'\n[1B0C:1AAC][2020-04-10T05:16:05]i000: Initializing numeric variable\n  'Include_test' to value '1'\n[1B0C:1AAC][2020-04-10T05:16:05]i000: Initializing numeric variable\n  'Include_doc' to value '1'\n[1B0C:1AAC][2020-04-10T05:16:05]i000: Initializing numeric variable\n  'Include_tools' to value '1'\n[1B0C:1AAC][2020-04-10T05:16:05]i000: Initializing numeric variable\n  'Include_tcltk' to value '1'\n[1B0C:1AAC][2020-04-10T05:16:05]i000: Initializing numeric variable\n  'Include_pip' to value '1'\n[1B0C:1AAC][2020-04-10T05:16:05]i000: Initializing numeric variable\n  'Include_launcher' to value '-1 '\n  [1B0C:1AAC][2020-04-10T05:16:05]i000: Initializing string variable\n  'Include_launcherState' to value 'enabled'\n[1B0C:1AAC][2020-04-10T05:16:05]i000: Initializing numeric variable\n  'Include_symbols' to value '0'\n[1B0C:1AAC][2020-04-10T05:16:05]i000: Initializing numeric variable\n  'Include_debug' to value '0'\n[1B0C:1AAC][2020-04-10T05:16:05]i000: Initializing numeric variable\n  'LauncherOnly' to value '0'\n[1B0C:1AAC][2020-04-10T05:16:05]i000: Initializing numeric variable\n  'DetectedLauncher' to value '0'\n[1B0C:1AAC][2020-04-10T05:16:05]i000: Initializing numeric variable\n  'DetectedOldLauncher' to value '0'\n  [1B0C:1AAC][2020-04-10T05:16:05]i000: Initializing numeric variable\n  'AssociateFiles' to value '1'\n[1B0C:1AAC][2020-04-10T05:16:05]i000: Initializing numeric variable\n  'Shortcuts' to value '1'\n[1B0C:1AAC][2020-04-10T05:16:05]i000: Initializing numeric variable\n  'PrependPath' to value '0'\n[1B0C:1AAC][2020-04-10T05:16:05]i000: Initializing numeric variable\n  'CompileAll' to value '0'\n[1B0C:1AAC][2020-04-10T05:16:05]i000: Initializing numeric variable\n  'SimpleInstall' to value '0'\n[1B0C:1AAC][2020-04-10T05:16:05]i000: Initializing string variable\n  'SimpleInstallDescription' to value ''\n  [1B0C:1AAC][2020-04-10T05:16:05]i009: Command Line:\n  '-burn.clean.room=C:\\Users\\Admin\\Downloads\\python-3.8.2-amd64.exe\n  -burn.filehandle.attached=180 -burn.filehandle.self=188'\n[1B0C:1AAC][2020-04-10T05:16:05]i000: Setting string variable\n  'WixBundleOriginalSource' to value\n  'C:\\Users\\Admin\\Downloads\\python-3.8.2-amd64.exe'\n[1B0C:1AAC][2020-04-10T05:16:05]i000: Setting string variable\n  'WixBundleOriginalSourceFolder' to value 'C:\\Users\\Admin\\Downloads\\'\n[1B0C:1AAC][2020-04-10T05:16:05]i000: Setting string variable\n  'WixBundleLog' to value 'C:\\Users\\Admin\\AppData\\Local\\Temp\\Python\n  3.8.2 (64-bit)_20200410051605.log'\n[1B0C:1AAC][2020-04-10T05:16:05]i000: Setting string variable\n  'WixBundleName' to value 'Python 3.8.2 (64-bit)'\n[1B0C:1AAC][2020-04-10T05:16:05]i000: Setting string variable\n  'WixBundleManufacturer' to value 'Python Software Foundation'\n[1B0C:1AAC][2020-04-10T05:16:05]i000: Setting numeric variable\n  'CRTInstalled' to value 1\n[1B0C:1D88][2020-04-10T05:16:05]i000: Did not find\n  C:\\Users\\Admin\\Downloads\\unattend.xml\n[1B0C:1D88][2020-04-10T05:16:05]i000: Setting string variable\n  'ActionLikeInstalling' to value  'Installing'\n[1B0C:1D88][2020-04-10T05:16:05]i000: Setting string variable\n  'ActionLikeInstallation' to value 'Setup'\n[1B0C:1D88][2020-04-10T05:16:05]i000: Setting version variable\n  'WixBundleFileVersion' to value '3.8.2150.0'\n[1B0C:1D88][2020-04-10T05:16:05]e000: Detected Windows 7 SP1 without\n  KB2533623\n[1B0C:1D88][2020-04-10T05:16:05]e000: KB2533623 update is required to\n  continue.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":1437,"Q_Id":61134051,"Users Score":0,"Answer":"I have observed that versions above 3.7.2 require more that just the SP1 update. Looking at your log files, you will find that it requires you to install the update KB2533623. Unless you fulfill the all the prerequisites for the installation, you wouldn't be able to continue with it. Install the appropriate updates as referred to by the setup\/log-file and try again. \nIt is probable that the Service Pack 1 update might have not installed properly into the system. You would need to retry installing the updates. I am afraid to tell you that official free support and updates to Windows 7 have been discontinued since the onset of 2020, so you might have a hard time finding the correct update. \nSometimes, the update unexpectedly fails to install properly. If nothings else works, the service pack version may be fixed through the registry, but at one's own risk as it might lead to consequences. \nHandling the registry is dangerous, so proceed at your own risk.\n\nOpen the registry editor.\nNavigate to HKEY_LOCAL_MACHINE\/SYSTEM\/CurrentControlSet\/Control\/Windows.\nModify the hexadecimal value of CSDVersion to 100 for SP1, 200 for SP2, and 300 to SP3.\nRestart the PC.","Q_Score":0,"Tags":"python,python-3.x,windows","A_Id":61146905,"CreationDate":"2020-04-10T04:26:00.000","Title":"Error while attempting to install Python 3.8.2 on Windows 7","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I installed opencv 4.3.0 from the source. It was installed sucessfully. \npkg-config --modversion opencv4 gives the output 4.3.0 . But when i try to import cv2 module in pythone it says cv2 module not found. I have Linux(Debian) in my system with python 3.8.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":187,"Q_Id":61152549,"Users Score":0,"Answer":"Likely has to do with where the package was installed. If you used apt-get, I would recommend removing and trying with pip install opencv-python. Aside from that, you can also try running sudo python3 and then importing.\nhope that helps!","Q_Score":0,"Tags":"python,linux,opencv","A_Id":61152598,"CreationDate":"2020-04-11T05:34:00.000","Title":"Python could not detect OpenCv installed in my system","Data Science and Machine Learning":1,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"when clicking \"Run Python file in terminal\" how do I stop the script? the only way that I found is by clicking the trashcan which deletes the log in the terminal.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":250,"Q_Id":61158465,"Users Score":0,"Answer":"When a Python file is running in the terminal you can hit Ctrl-C to try and interrupt it.","Q_Score":0,"Tags":"python,python-3.x,visual-studio,visual-studio-code,vscode-settings","A_Id":61239622,"CreationDate":"2020-04-11T14:36:00.000","Title":"How to stop vscode python terminal without deleting the log?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I entered '''idle''' on terminal\nand it only shows me python2 that has already been here.\nHow can i see python3 idle on my mac \nwhile i installed python3 with pip?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":31,"Q_Id":61183792,"Users Score":0,"Answer":"you can specify the version\nidle3","Q_Score":0,"Tags":"python,pip,python-idle","A_Id":61184026,"CreationDate":"2020-04-13T08:07:00.000","Title":"how can i find IDLE in my mac though i installed my python3 with pip?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am new to coding, and I think I messed up with pip... Can someone help me with this?\nI am using Macbook, version 10.15.2.\nI think I tried alias? I can't remember... \nBut I don't have trouble with pip with bash.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":426,"Q_Id":61196768,"Users Score":0,"Answer":"I came across the same problem I spent weeks trying to solve it and refused to reinstall macOS.\n1) The cause of the problem\n\nYou have installed different distribution of python\n\n2) Solution\n\nOpen Terminal\nWrite cd ~\nThen write 'vim .zshrc'\nPress i set the pip and python alias and remove any-other alias (in my case I set it to be conda)\n\n***NOTE I HAVE REMOVED EVERY PYTHON DISTRIBUTION EXCEPT FOR PYTHON 2.7 AND ANACONDA ***","Q_Score":0,"Tags":"python,macos,pip","A_Id":66581591,"CreationDate":"2020-04-13T21:06:00.000","Title":"pip --version zsh: no such file or directory: usr\/local\/bin\/pip3","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Sorry for answering my own question, but I've seen this crop up in multiple forums, so I wanted to post this in hope it helps someone else.  \nThe basic problem occurs when trying to run Ansible against older Python interpreters -- particularly Python 2.6 on RedHat 5 -- and getting error messages about 'libselinux bindings not available' or similar errors. \nWhile this could happen for any Python-based application, I see it most commonly on Ansible.  Ansible presumes the selinux module is available and will always attempt to import it at runtime.","AnswerCount":2,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":3398,"Q_Id":61211678,"Users Score":1,"Answer":"I would have liked to post this as a comment to the @crankyeldergod's answer (as his response lead me to figure out my fix to this issues) but I don't have enough posts to comment yet.\nI also kept receiving the \"Aborting, target uses selinux but python bindings (libselinux-python) aren't installed!\" error despite having the libselinux-python packages installed.  I went into \/usr\/lib64 and checked the python directories I found there until I located the one with selinux files present.  I made note of that version of python and declared it explicitly in my inventory file, ie - ansible_python_interpreter=\/usr\/bin\/python3.6 in my case and that resolved the issue.","Q_Score":0,"Tags":"python,ansible,libselinux","A_Id":70644703,"CreationDate":"2020-04-14T15:42:00.000","Title":"libselinux-python bindings and ansible","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm trying to do build in Developer Command Prompt of VS 2019 using Python script.\nHere is piece of code i'm using:\nimport os\nos.system('start \/wait C:\/Windows\/System32\/cmd.exe  \"msbuild C:\/Users\/Desktop\/Project\/Project.sln\"')\nos.system(\"pause\") \nBut it is not working.Developer command prompt is appearing for just 1sec and disappearing .\nWhen i took variable to check if command was succesful or not ,it is giving variable result as zero,which means command is successful but i'm not able to see it in Developer command prompt.\nresult= os.system('start \/wait C:\/Windows\/System32\/cmd.exe \/k ipconfig')\nprint (result)\nWhereas when i'm trying the same command in windows command prompt it's working fine.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":2327,"Q_Id":61225873,"Users Score":0,"Answer":"How to run a command in Developer command prompt 2019 using Python\n\nDeveloper command prompt 2019 is a tool which is integrated into VS2019 IDE and provides environment parameters for various development modules.\nHowever, the CMD.exe does not have these environment variables for these, so you cannot just use CMD.exe directly. Sorry that I am not familiar with python code and script. I suggest you could configure Developer command prompt 2019 into System environment variable PATHand then call cmd.exe which integrates the related variables to build your projects without any errors.\nSuggestion\nFirst, if you build your project on another new agent, you should install one of tool from step 1.\n1) If you install VS2019 IDE in your local agent,please make sure that your local agent has VS2019 IDE and install the related workload about your project type.\nBesides, if you install Build Tool for VS2019, please also install the related workload.\n2) set the below path under System environment variable PATH \nVS2019 IDE: \nC:\\Program Files (x86)\\Microsoft Visual Studio\\2019\\Community\\MSBuild\\Current\\Bin\nBuild Tool for VS2019:\nC:\\Program Files (x86)\\Microsoft Visual Studio\\2019\\BuildTools\\MSBuild\\Current\\Bin\n3) Then you can call your python script as you described to build your projects.\nAny feedback and concern will be expected.","Q_Score":0,"Tags":"python-3.x,visual-studio-code,msbuild,visual-studio-2019","A_Id":61242030,"CreationDate":"2020-04-15T09:53:00.000","Title":"How to run a command in Developer command prompt 2019 using Python","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have 2 instances of Odoo 13 Enterprise in the same server under linux. The first instance is production instance. The customers can connect with it with his mobiles with Odoo app. This instance works fine. The second instance is used to try new modules before put it in production instance. The problem is when I send notifications on development instance the customer get this notifications on his mobiles, and this notifications seems like production instance notification. \nImportant notes: Production instance is under Nginx proxy and have domain, but development instance haven't.\nI'm looking for some forgoten setting, but I didn't see any mistake.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":66,"Q_Id":61229361,"Users Score":0,"Answer":"I fixed this issue uninstalling module ocn_client. This module cache some dependencies and send gosth notifications.","Q_Score":0,"Tags":"python,linux,odoo,odoo-13,odoo-enterprise","A_Id":61253677,"CreationDate":"2020-04-15T12:58:00.000","Title":"Gosth notifications in Odoo 13 EE","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I've built the image successfully, but when I run docker run <xxxx:latest> it returns nothing.\nI also have a bash script that contains AWS crendential (because a Python script within the container requires credential to log into AWS to perform something), when I tried to run that script it also returns nothing, has anyone encountered this issue? Many thanks.","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":1379,"Q_Id":61233802,"Users Score":1,"Answer":"Did you do: docker run -it xxxx?\n-i flag, connects your terminal to STDIN\n-t flag, provides a better visualization of what you see on the screen\n-it is a syntactic coating for -i -t flags used separately\nAlso, what does it show on doing docker ps --all? Does it show that the container is running?","Q_Score":1,"Tags":"python,bash,amazon-web-services,docker,containers","A_Id":61238369,"CreationDate":"2020-04-15T16:29:00.000","Title":"docker run command returns nothing","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am just getting started on a web2py tutorial. I have downloaded the web2py Windows binaries, extracted the files and am simply trying to start by opening web2py.exe\nWhen i double click the icon a black command prompt looking window opens up but then closes immediately, and the web2py Web Framework window does not open as it is supposed to.\nNot sure if this is important but I have Python 3.7 installed, do not have any 2.x version installed, but web2py.com does not mention that any of this is needed, it should load up right out of the box. I have searched extensively and do not see anyone else with the same issue. I have tried restarting my computer, deleting and re-downloading the web2py zip folder, but nothing changes.\nEdit: Tried opening application from command prompt, same result.\nAlso I have now tried it on two different Windows machines (one work, one personal) and had the same issue.","AnswerCount":4,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":298,"Q_Id":61238173,"Users Score":0,"Answer":"i recommend you to use source code version. It's more flexible to use across any platforms.","Q_Score":0,"Tags":"python,web2py","A_Id":61647264,"CreationDate":"2020-04-15T20:36:00.000","Title":"Web2Py.exe Will Not Open","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I am confused in celery.Example i want to load a data file and it takes 10 seconds to load without celery.With celery how will the user be benefited? Will it take same time to load data?","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":54,"Q_Id":61240266,"Users Score":0,"Answer":"Normally, the user has to wait to load the data file to be done on the server. But with the help of celery, the operation will be performed on the server and the user will not be involved. Even if the app crashes, that task will be queued.\n\nCelery will keep track of the work you send to it in a database\n  back-end such as Redis or RabbitMQ. This keeps the state out of your\n  app server's process which means even if your app server crashes your\n  job queue will still remain. Celery also allows you to track tasks\n  that fail.","Q_Score":1,"Tags":"python,django,flask,celery","A_Id":61240414,"CreationDate":"2020-04-15T23:29:00.000","Title":"What is the use of Celery in python?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am confused in celery.Example i want to load a data file and it takes 10 seconds to load without celery.With celery how will the user be benefited? Will it take same time to load data?","AnswerCount":2,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":54,"Q_Id":61240266,"Users Score":0,"Answer":"Celery, and similar systems like Huey are made to help us distribute (offload) the amount of processes that normally can't execute concurrently on a single machine, or it would lead to significant performance degradation if you do so. The key word here is DISTRIBUTED.\nYou mentioned downloading of a file. If it is a single file you need to download, and that is all, then you do not need Celery. How about more complex scenario - you need to download 100000 files? How about even more complex - these 100000 files need to be parsed and the parsing process is CPU intensive?\nMoreover, Celery will help you with retrying of failed tasks, logging, monitoring, etc.","Q_Score":1,"Tags":"python,django,flask,celery","A_Id":61245388,"CreationDate":"2020-04-15T23:29:00.000","Title":"What is the use of Celery in python?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am using subprocess.Popen() in a Python script to run an executable of C++ program. I need to return a value from the C++ program which can be used in the Python script.\nI have lots of printf statements in the C++ program, so I can't use PIPE and get the output.\nCan I return a single value which is received by the script?","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":406,"Q_Id":61244258,"Users Score":0,"Answer":"Check the returncode attribute of the object returned by Popen.\nNote that it is only filled if you have called poll() or wait() first on the Popen object.","Q_Score":0,"Tags":"python,c++,subprocess,return-value","A_Id":61244394,"CreationDate":"2020-04-16T06:46:00.000","Title":"Get a return value from C++ program to a Python script using subprocess","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am using subprocess.Popen() in a Python script to run an executable of C++ program. I need to return a value from the C++ program which can be used in the Python script.\nI have lots of printf statements in the C++ program, so I can't use PIPE and get the output.\nCan I return a single value which is received by the script?","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":406,"Q_Id":61244258,"Users Score":0,"Answer":"This issue is solved. Basically python script subprocess can recieve exit code. cpp file can return that code from int main() which can be used as exit code of the prog in python script.","Q_Score":0,"Tags":"python,c++,subprocess,return-value","A_Id":61248560,"CreationDate":"2020-04-16T06:46:00.000","Title":"Get a return value from C++ program to a Python script using subprocess","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am currently developing a Python tool for Windows that is able to lookup all devices connected to a windows pc. It already supports ethernet devices and by now I'm trying to add support for USB and serial devices. For those devices I want to read out their vendor id, product id, serial number and of course the address\/port which is needed to connect to the device.\nSimple USB devices can be easily detected with PyUSB or PyWin32. Unfortunately, many devices say that its vendor is FTDI, which is not the case. As far as I know, FTDI just provides the USB adapter\/converter.\nSo, how can I lookup the device behind the FTDI adapter? I already tried PyUSB, PyWin32 and PySerial, but all of them just say, that there is a FTDI-device connected; but I want to know the actual device behind the FTDI adapter... Is there a way to find that out?\nI hope that you can help me... Thank you for that in advance.\nUpdate\nSince there seems to be no universal solution, is there at least a way to uniquely identify one of those FTDI devices? Some of them provide serial numbers, but unfortunately not all of them. For example there are devices, with a device id like \"USB\\VID_0403&PID_FAF0\\7&5E2426C&0&2\", where \"7&5E2426C&0&2\" should be the serial number. But these serial numbers with ampersands in it are not the real serial numbers (maybe it is something from Windows or so). PySerial even recognizes this serial number only as \"7\".\nIf I had at least the possibility to get the real serial number of that device, this would be very helpful. So I could uniquely identify that device, even if it got a new port or device id after disconnecting and reconnecting. Or are those ampersand-serials always the same for one device?","AnswerCount":4,"Available Count":2,"Score":0.049958375,"is_accepted":false,"ViewCount":669,"Q_Id":61245593,"Users Score":1,"Answer":"Af far as company using FTDI is not interested in buying own vendor ID you are out of luck.\nThere is no standard protocol behind FTDI so no universal way to detect device behind it.","Q_Score":1,"Tags":"python,windows,serial-port,usb,ftdi","A_Id":61245727,"CreationDate":"2020-04-16T08:13:00.000","Title":"How to find out what instruments is behind a FTDI adapter on Windows?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am currently developing a Python tool for Windows that is able to lookup all devices connected to a windows pc. It already supports ethernet devices and by now I'm trying to add support for USB and serial devices. For those devices I want to read out their vendor id, product id, serial number and of course the address\/port which is needed to connect to the device.\nSimple USB devices can be easily detected with PyUSB or PyWin32. Unfortunately, many devices say that its vendor is FTDI, which is not the case. As far as I know, FTDI just provides the USB adapter\/converter.\nSo, how can I lookup the device behind the FTDI adapter? I already tried PyUSB, PyWin32 and PySerial, but all of them just say, that there is a FTDI-device connected; but I want to know the actual device behind the FTDI adapter... Is there a way to find that out?\nI hope that you can help me... Thank you for that in advance.\nUpdate\nSince there seems to be no universal solution, is there at least a way to uniquely identify one of those FTDI devices? Some of them provide serial numbers, but unfortunately not all of them. For example there are devices, with a device id like \"USB\\VID_0403&PID_FAF0\\7&5E2426C&0&2\", where \"7&5E2426C&0&2\" should be the serial number. But these serial numbers with ampersands in it are not the real serial numbers (maybe it is something from Windows or so). PySerial even recognizes this serial number only as \"7\".\nIf I had at least the possibility to get the real serial number of that device, this would be very helpful. So I could uniquely identify that device, even if it got a new port or device id after disconnecting and reconnecting. Or are those ampersand-serials always the same for one device?","AnswerCount":4,"Available Count":2,"Score":0.049958375,"is_accepted":false,"ViewCount":669,"Q_Id":61245593,"Users Score":1,"Answer":"FTDI is typically allow the use of an EEPROM (actually it is in most cases a simple flash memory) to store specific information about the product in it. E.g. one can assign a specific vendorID, ProductID, SerialNo, Manufacturer Desc., Product Desc. BUT it is only optional (For details search for FT_Prog). So every product designer has the freedom, but does not need to fill in whatever he\/she wants. \nIf you have a set of devices you want to support you could check if the either support a SCPI compliant interface. In this case you can ask them using *IDN? about their identity. If not you can hope that the product has properly written ROM to supply further information. In any other case you can only guess.","Q_Score":1,"Tags":"python,windows,serial-port,usb,ftdi","A_Id":61247913,"CreationDate":"2020-04-16T08:13:00.000","Title":"How to find out what instruments is behind a FTDI adapter on Windows?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Apologies, I know this question has been asked a bunch, but none of those solutions seem to work for me.\nWindows 10\nPython 3.7.7\nC:\\Python7 is my directory\nPATH variables are set\npython -m ensure pip states requirements satisfied\nThere are no .py scripts in the scripts folder to add a line to, only .exe files\nI'm so lost","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":74,"Q_Id":61247592,"Users Score":0,"Answer":"Both C:\\Python7 and C:\\Python7\\Scripts needed to be in path apparently, I only had the Scripts one.","Q_Score":0,"Tags":"python,windows,pip","A_Id":61259525,"CreationDate":"2020-04-16T10:04:00.000","Title":"pip: failed to create process","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Can i set the path in the anaconda installer to $ \/home\/.anaconda ?\nWhen it will get added to the PATH will it lauch ?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":104,"Q_Id":61266293,"Users Score":0,"Answer":"Yes, it is possible. \nBut you may have to manually run:\n$ source <path to conda>\/bin\/activate\n$ conda init\nand after that it worked.","Q_Score":0,"Tags":"python,anaconda,data-science","A_Id":61267226,"CreationDate":"2020-04-17T07:35:00.000","Title":"Can I install anaconda on linux in a hidden folder?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm running Catalina 10.15.3 at the moment. Prior to upgrading, my python build in Sublime Text was accessing the environment variables no problem  with os.environ.get('A'). However, since the upgrade this is no longer true.\nI've moved everything from my previous .bash_profile to my .zprofile. Additionally, if I launch python from zsh directly there is no issue. \nAny help would be greatly appreciated.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":37,"Q_Id":61280450,"Users Score":0,"Answer":"I was able to solve this by launching Sublime Text 3 from a zsh shell.","Q_Score":0,"Tags":"python,environment-variables,sublimetext3","A_Id":61446859,"CreationDate":"2020-04-17T20:50:00.000","Title":"Sublime Text 3 no longer accessing environment variables","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm trying to install scrot package by apt-get using python on jupyter. The server that I'm trying to make install is an online access jupyter, I don't have direct shell access. So I have to use python for this installation.\nI used:\nimport os\nstream = os.popen('apt-get install -y scrot')\noutput = stream.read()\noutput\nAnd:\nfrom subprocess import check_call, CalledProcessError\nimport os\ntry:\n\u00a0\u00a0\u00a0 check_call(['apt-get', 'install', '-y', 'scrot'], stdout=open(os.devnull,'wb')) \nexcept CalledProcessError as e: \n\u00a0\u00a0\u00a0 print(e.output)\nI used those and codes like them. But they just don't work. No errors, nothing. So I can't determine the problem. Can you help please ?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":89,"Q_Id":61302947,"Users Score":0,"Answer":"When you execute a command in OS you use the user that is running the jupyter server.\nFor apt-get something you will need root access, and it's very improbable that the jupyter server is running with that permissions.","Q_Score":0,"Tags":"python,jupyter","A_Id":61303202,"CreationDate":"2020-04-19T10:36:00.000","Title":"Can't use shell commands using python (jupyter)","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I got an error downloading Anaconda. Let me explain step by step :\n\nI download windows 64 bits installer (I'm on win 10)\nI launch the exe\nI follow the steps, don't do anything, just accept and run it\nIt says \"space required : 3Gb, space disponible : 41Gb\"\nIt installs Anaconda really fast\nWhen I start _conda.exe, the only exe (with the uninstaller), a cmd appears,writes some lines and closes. Just that, nothing else.\n\nMy Anaconda 3 folder says \"466Mb\", not 3Gb at all... Coincidence ?\nMy installer weights also 466Mb... Did it just extract the installer or something ?\nGuys on other forums that have Anaconda told me I got less than half of the files. How could I download it properly ? Where is the problem located ? The computer ? The installer ? Something else ?\nI already got python and Sublime Text, and in the installer, there are options with path etc... I didn't touch that but maybe the error comes from here ?\nThank you so much if you can help, have a nice day !","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":47,"Q_Id":61317942,"Users Score":0,"Answer":"Oooooh it worked ! Thanks to John Coleman that gave me the link ^^\nIt was said inside that a guy had the same problem, installed the 32-bits version and it worked... So I did same and now I got way more files and it works !\nThanks to all who answered !","Q_Score":1,"Tags":"python,python-3.x,anaconda","A_Id":61323537,"CreationDate":"2020-04-20T08:18:00.000","Title":"Anaconda doesn't install","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"error code: \nclient = pymongo.MongoClient(\"mongodb+srv:\/\/********?retryWrites=true&w=majority\")\nFile \"\/home\/ubuntu\/.local\/lib\/python3.6\/site-packages\/pymongo\/mongo_client.py\", line 621, in init\nconnect_timeout=timeout)\nFile \"\/home\/ubuntu\/.local\/lib\/python3.6\/site-packages\/pymongo\/uri_parser.py\", line 463, in parse_uri\nnodes = dns_resolver.get_hosts()\nFile \"\/home\/ubuntu\/.local\/lib\/python3.6\/site-packages\/pymongo\/srv_resolver.py\", line 102, in get_hosts\n_, nodes = self._get_srv_response_and_hosts(True)\nFile \"\/home\/ubuntu\/.local\/lib\/python3.6\/site-packages\/pymongo\/srv_resolver.py\", line 83, in _get_srv_response_and_hosts\nresults = self._resolve_uri(encapsulate_errors)\nFile \"\/home\/ubuntu\/.local\/lib\/python3.6\/site-packages\/pymongo\/srv_resolver.py\", line 79, in _resolve_uri\nraise ConfigurationError(str(exc))\npymongo.errors.ConfigurationError: query() got an unexpected keyword argument 'lifetime'\nversions: \npython 3\npymongo: 3.10.1","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":154,"Q_Id":61320226,"Users Score":0,"Answer":"In my case was solution to use older type of URL:\nclient = pymongo.MongoClient(\"mongodb:\/\/:@...\nSW:\n\nUbuntu 18.04\nPython 2.7.17 \/ 2.7.12\nPymongo 3.11.1\nGoogle Cloud SDK 319.0.0\n\nConnection from test file directly for os was OK, but same code run from Google SDK dev appserver2 failed.\nAfter change URL generated by cloud.mongodb.com Atlas\nin section Cluster -> Connect -> Choose a connection method -> Python - 3.4 or later\nIt finally (after 4 days searching) started working.","Q_Score":0,"Tags":"python,pymongo","A_Id":64961308,"CreationDate":"2020-04-20T10:27:00.000","Title":"pymongo error on ec2 but working on VM on laptop","Data Science and Machine Learning":0,"Database and SQL":1,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"i run this command sudo apt install python3.7.\nE: The package libglu1-mesa:i386 needs to be reinstalled, but I can't find an archive for it.\nthis error massage still showing.\nReading package lists... Done\nBuilding dependency tree\nReading state information... Done\nSuggested packages:\n  python3.7-venv python3.7-doc\nThe following NEW packages will be installed:\n  python3.7\n0 upgraded, 1 newly installed, 0 to remove and 4 not upgraded.\n1 not fully installed or removed.\nNeed to get 0 B\/528 kB of archives.\nAfter this operation, 439 kB of additional disk space will be used.\nSelecting previously unselected package python3.7.\n(Reading database ... 199040 files and directories currently installed.)\nPreparing to unpack ...\/python3.7_3.7.7-1+bionic1_amd64.deb ...\nUnpacking python3.7 (3.7.7-1+bionic1) ...\nProcessing triggers for mime-support (3.60ubuntu1) ...\nProcessing triggers for desktop-file-utils (0.23-1ubuntu3.18.04.2) ...\nSetting up python3.7 (3.7.7-1+bionic1) ...\nProcessing triggers for man-db (2.8.3-2ubuntu0.1) ...\ndpkg: error processing package libglu1-mesa:i386 (--configure):\n package is in a very bad inconsistent state; you should\n reinstall it before attempting configuration\nProcessing triggers for gnome-menus (3.13.3-11ubuntu1.1) ...\nErrors were encountered while processing:\n libglu1-mesa:i386\nE: Sub-process \/usr\/bin\/dpkg returned an error code (1)","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":394,"Q_Id":61323869,"Users Score":0,"Answer":"use sudo apt-get install software-properties-gtk","Q_Score":0,"Tags":"python-3.x","A_Id":61323947,"CreationDate":"2020-04-20T13:39:00.000","Title":"How to install software-properties-gtk package in python? on ubuntu","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm wondering why it is possible that the following command works: \nairflow test [dag_id] [task_id] 20200421\nbut that the same task fails if I trigger the dag manually in the UI. \nThe task itself is quite easy, it is basically: \ncmd = 'ls' # other command\nos.system(cmd)\nthe os library is imported, and like said above, in testing it does work, but in running it does not. My code is in python, and this specific dag needs to run a specific command in the terminal. \nHave you got any idea how this is possible? \nIf you need more info, let me know in the comments!","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":582,"Q_Id":61347143,"Users Score":0,"Answer":"One possible reason for this behaviour could be, your task that was executed earlier cached in the DB.\nSo the test works but when you call airflow to run the DAG it fails as it already running in the background or the state is cached in database. Try running $ airflow resetdb","Q_Score":1,"Tags":"python-3.x,airflow","A_Id":61353370,"CreationDate":"2020-04-21T15:26:00.000","Title":"Airflow test task works, but in dag run fails","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm wondering why it is possible that the following command works: \nairflow test [dag_id] [task_id] 20200421\nbut that the same task fails if I trigger the dag manually in the UI. \nThe task itself is quite easy, it is basically: \ncmd = 'ls' # other command\nos.system(cmd)\nthe os library is imported, and like said above, in testing it does work, but in running it does not. My code is in python, and this specific dag needs to run a specific command in the terminal. \nHave you got any idea how this is possible? \nIf you need more info, let me know in the comments!","AnswerCount":2,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":582,"Q_Id":61347143,"Users Score":0,"Answer":"Answer: \nThis problem is due to the different user that runs the script. \nairflow run uses a different user (and (sub-) processes) as airflow test. Switching to the airflow user does not work, but providing the airflow user with more rights (in linux) should work.","Q_Score":1,"Tags":"python-3.x,airflow","A_Id":62060639,"CreationDate":"2020-04-21T15:26:00.000","Title":"Airflow test task works, but in dag run fails","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I've been teaching myself Python3\/API\/PyQt5 and OOP for the last few weeks and I have finally made an app that works, yay!\nI've been working on Ubuntu 19 and the app works fine when I run it from the terminal. The problem is trying to compile it (correct term?) to make it an executable for Linux and Windows.\nI used pyinstaller app.py --onefile -w --icon=\"app.ico\" to make the files and I get no errors that I can see. \nI used Windows 10 to compire the exe.\nHere is the problem: On Linux I get a \"shared library\" file that doesn't execute and on windows the exe is just broken. All I get is an error saying \"this program cannot run on your system\", or something similar to that.\nThis is a very simple, 1 script app with a PyQt5 GUI. I'm pretty new to all of this and this has by far been the hardest part. I've been stuck on this for days and I can't get it to work.\nI can give you guys the app code if it will help, I just don't think I have enough rep to post links so it might have to be a code block.\nI will be grateful for any help you guys can give as I'm out of ideas.\nCheers!\nEditing to add: windows 8.1 gives the error message \"Error -3 from inflate: invalid block lengths\" when the app.exe is run","AnswerCount":2,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":2355,"Q_Id":61354226,"Users Score":0,"Answer":"After a lot more tinkering I finally have a working exe. \nI used -D to make a directory rather than the --onefile as that doesn't work. It makes an exe that doesn't work. Windows complains that it can't unpack the app.\nThe exe that is inside the dist directory works on Windows 8.1 and Windows 10. Didn't test on Win 7.\nI also included the png and ico files and used a clean env with python 3.8 instead of my working env with 3.7 installed. I'm not sure if any of these things made a difference but if anyone else is looking for an answer, this might help.\nMy final command: \n    pyinstaller -y -D -w -i \"FULL PATH TO ICON .ico\" --add-data \"FULL PATH TO IMAGE .png\";\".\"  \"FULL PATH TO PY FILE \/app.py\"","Q_Score":0,"Tags":"python,pyqt5,pyinstaller","A_Id":61393568,"CreationDate":"2020-04-21T22:20:00.000","Title":"Executables made with pyinstaller not working","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":1,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I've been teaching myself Python3\/API\/PyQt5 and OOP for the last few weeks and I have finally made an app that works, yay!\nI've been working on Ubuntu 19 and the app works fine when I run it from the terminal. The problem is trying to compile it (correct term?) to make it an executable for Linux and Windows.\nI used pyinstaller app.py --onefile -w --icon=\"app.ico\" to make the files and I get no errors that I can see. \nI used Windows 10 to compire the exe.\nHere is the problem: On Linux I get a \"shared library\" file that doesn't execute and on windows the exe is just broken. All I get is an error saying \"this program cannot run on your system\", or something similar to that.\nThis is a very simple, 1 script app with a PyQt5 GUI. I'm pretty new to all of this and this has by far been the hardest part. I've been stuck on this for days and I can't get it to work.\nI can give you guys the app code if it will help, I just don't think I have enough rep to post links so it might have to be a code block.\nI will be grateful for any help you guys can give as I'm out of ideas.\nCheers!\nEditing to add: windows 8.1 gives the error message \"Error -3 from inflate: invalid block lengths\" when the app.exe is run","AnswerCount":2,"Available Count":2,"Score":-0.0996679946,"is_accepted":false,"ViewCount":2355,"Q_Id":61354226,"Users Score":-1,"Answer":"To make it work on Unix systems you will probably have to use dos2unix \"appname\" in Terminal, since windows adds some weird endings to any files containing text. That's how it works for me","Q_Score":0,"Tags":"python,pyqt5,pyinstaller","A_Id":68509604,"CreationDate":"2020-04-21T22:20:00.000","Title":"Executables made with pyinstaller not working","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":1,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"The tutorial writes in source env\/bin\/activate\nWhen I write it in this is what comes out:\n\n(venv) C:\\Users\\user\\PycharmProjects\\FirstProject>source env\/bin\/activate\n  'source' is not recognized as an internal or external command,\n  operable program or batch file.\n\nHe uses a mac and I use Windows 10, do I need a different line of code?","AnswerCount":3,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":53,"Q_Id":61363163,"Users Score":0,"Answer":"just run: env\\Scripts\\activate. You do not need to use source on Windows.","Q_Score":0,"Tags":"python,django,python-venv","A_Id":61363536,"CreationDate":"2020-04-22T10:43:00.000","Title":"I'm trying to complete the Django website tutorial, following the youtube tutorial - and at the beginning I have this \"error\"","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"The tutorial writes in source env\/bin\/activate\nWhen I write it in this is what comes out:\n\n(venv) C:\\Users\\user\\PycharmProjects\\FirstProject>source env\/bin\/activate\n  'source' is not recognized as an internal or external command,\n  operable program or batch file.\n\nHe uses a mac and I use Windows 10, do I need a different line of code?","AnswerCount":3,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":53,"Q_Id":61363163,"Users Score":0,"Answer":"don't use source, instead just type in your_env_name\\Scripts\\activate.bat\nRemember to use backward slashes.","Q_Score":0,"Tags":"python,django,python-venv","A_Id":64153540,"CreationDate":"2020-04-22T10:43:00.000","Title":"I'm trying to complete the Django website tutorial, following the youtube tutorial - and at the beginning I have this \"error\"","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I tried to install the mysqlclient-module for python 3.8. I ran into several problems while doing so that are described in other posts. I then tried to install it on another pc where it worked. On the first one it downloaded the mysql.tar.gz file and tried to build the file by itself(failed due to another error). But on the other pc it instead downloaded the 1.4.6-cp38-cp38-win_amd64.whl file and installed it correctly. Both machines run Windows 10 and when running platform.architecture() i receive the same result on both. I even tried installing the wheel manually on the first machine where i got the \"not supported wheel on this plattform\". The only difference i found in the systemversions is the build which is 17763 on the one it worked and 18363 on the one it didnt work (although i believe this shouldnt be the source)","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":20,"Q_Id":61363303,"Users Score":0,"Answer":"After trying around a bit i realized this error only occurs while beeing in the virtual enviroment in pycharm on the first machine. I was able to install it outside of the virtual enviroment and then copy the created files manually to the virtual enviroment.","Q_Score":0,"Tags":"python","A_Id":61365161,"CreationDate":"2020-04-22T10:51:00.000","Title":"Python wheel not supported on this plattform","Data Science and Machine Learning":0,"Database and SQL":1,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I would like to know the max memory usage of a celery task, but from the documentations none of the celery monitoring tools provide the memory usage feature. How can one know how much memory a task is taking up? I've tried to get the pid with billiard.current_process and use that with memory_profiler.memory_usage but it looks like the current_process is the worker, not the task.\nThanks in advance.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":595,"Q_Id":61388299,"Users Score":0,"Answer":"Celery does not give this information unfortunately. With little bit of work it should not be difficult to implement own inspect command that actually samples each worker-process. Then you have all necessary data for what you need. If you do this, please share the code around as other people may need it...","Q_Score":1,"Tags":"celery,python-multiprocessing,celery-task,celeryd","A_Id":61393652,"CreationDate":"2020-04-23T13:21:00.000","Title":"How to monitor memory usage of individual celery tasks?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have simple .py files that run fine in my IDE (IDLE), however when I execute from terminal it just gets weird.\nI have a folder with a dozen or so .py scripts. I change the directory, then execute python3 script.py from terminal but it runs a completely different script. It's very odd. And it's always the same script that is run. They are all independent scripts and don't import anything from each other.\nI executed cat python3 script.py and it looks exactly as it should. Is there something wrong with my Python installation?","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":77,"Q_Id":61389241,"Users Score":0,"Answer":"Try Some Solutions:\n1: Double Check if Python is included in the System Environment.\n2: Run the command from a console to directly check and upgrade the pip; \n\npython -m pip install --upgrade pip\n\nin case you have different version of Python Installed \n\npython3 -m pip install --upgrade pip\n\n3: You can locate your Script with Python by creating .bat file for your script and then just double click the bat file to run your script from any directory after locating properly.\n4: Check if the script need any requirements to run in console without IDE.","Q_Score":1,"Tags":"python,terminal","A_Id":61389437,"CreationDate":"2020-04-23T14:09:00.000","Title":"Python scripts not running properly from terminal","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a simple flask app that talks to Google Cloud Storage.\nWhen I run it normally with python -m api.py it inherits Google Cloud access from my cli tools.\nHowever, when I run it with the PyCharm debugger it can no longer access any Google Services.\nI've been trying to find a way to have the PyCharm debugger inherit the permissions of my usual shell but I'm not seeing any way to do that.\nAny tips on how I can use the PyCharm debugger with apps that require access to Google Cloud?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":270,"Q_Id":61392695,"Users Score":1,"Answer":"I usually download the credentials file and set GOOGLE_APPLICATION_CREDENTIALS=\"\/home\/user\/Downloads\/[FILE_NAME].json environment variable in PyCharm. \nI usually create a directory called auth and place the credential file there and add that directory to .gitignore\nI don't know if it is a best practice or not but it gives me an opportunity to limit what my program can do. So if I write something that may have disrupting effect, I don't have to worry about it. Works great for me. I later use the same service account and attach it to the Cloud Function and it works out just fine for me.","Q_Score":0,"Tags":"python,google-cloud-platform,pycharm","A_Id":61395962,"CreationDate":"2020-04-23T16:53:00.000","Title":"How can I use the PyCharm debugger with Google Cloud permissions?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I am using airflow to orchestrate my ETL.\nFor ingestion from certain sources like APIs I am using custom Airflow Plugins(with hooks and operators)\nMy question is why to use Airflow Plugins , we can achieve the same result by using a Bash Operator to trigger simple python script to achieve the same result.\nIs there a distinct advantage of using the Airflow Plugins vs using a external python script","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":183,"Q_Id":61401688,"Users Score":1,"Answer":"You use the plugins provided because they are much easier to use and are built to perform a specific task. For example, I built an operator that extracts data from a database (Snowflake) and writes it to Slack as an ASCII table. How would you perform the same task using the bash operator? Sure you could do it but it's ugly and not the \"airflow way\". \nWhat ends up happening if you only use the bash operator is that you'll eventually come across a task that is much easier to do in Python and you'll start calling python code from your bash operator which is when things really get messy. Then someone who understands how Airflow works ends up asking: \"Why didn't you just write a new operator to do this?\"","Q_Score":2,"Tags":"python,airflow-scheduler,airflow","A_Id":61484243,"CreationDate":"2020-04-24T05:22:00.000","Title":"Why use Airflow Plugins","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have an idea to make something similar to Workflowy but with some new features. \n(Workflowy is basically a note-taking app which beautifully organises all your notes as an endless tree)\nAt first, I implemented the logic in Python. It works in a terminal by printing notes line-by-line and then waiting for the command. \nIs this a good idea to keep all the logic at the server and use JS only to render items and to send commands to the server? \nFor instance, if I want to move the entire folder into another folder, there are two ways of doing this:\n\nWay 1: With Python which receives a command from JS 'move folder x to folder y', processes it and sends back a result to render.\nWay 2: With JS which then has to understand all the folder structure and logic. In this case, the app will use a server only for storing data. \n\nI have a feeling that way 2 (using JS to understand all the logic and Python only for saving data) is more appropriate, but this means that I have to rewrite everything from scratch. \nIs the way 1 also reasonable? \nMany thanks in advance!","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":264,"Q_Id":61425765,"Users Score":1,"Answer":"It depends on the application you are making.\nLike if you want to display thousands of data in html file, and data are stored in a json file. If you send html file and json file to the client from the server, then on the client side, you run a script that reads json file and displays it in html, then it will be slower, because client device may not be that powerful as the server is.\nSo for performance, use heavy tasks on server side, this may cause little more internet usage because as the client has no data in formatted manner, whenever new task on data is to be performed, you have to request the server again.\nBut for opposite case, you can save internet and little low performance. Here you can do some heavy tasks on client side.\nIt also depends on which device is used at client side.","Q_Score":1,"Tags":"javascript,python,vue.js,frontend,backend","A_Id":61425859,"CreationDate":"2020-04-25T12:38:00.000","Title":"How do I divide tasks between frontend and backend properly?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"i installed pyenv and switched to python 3.6.9 (using pyenv global 3.6.9). How do i go back to my system python? Running pyenv global system didnt work","AnswerCount":3,"Available Count":1,"Score":0.0665680765,"is_accepted":false,"ViewCount":4990,"Q_Id":61428792,"Users Score":1,"Answer":"pyenv sets the python used according to ~\/.pyenv\/version. For a temporary fix, you can write system in it. Afterwards, you'll need to fiddle through your ~\/.*rc files and make sure eval \"$(pyenv init -)\" is called after any changes to PATH made by other programs (such as zsh).","Q_Score":4,"Tags":"python,pyenv","A_Id":61429475,"CreationDate":"2020-04-25T16:20:00.000","Title":"how do i go back to my system python using pyenv in Ubuntu","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have an issue, when using Visual Studio Code, and when I'm choosing the interpreter of Python to use within a code, I realize there are two different installations or Python 3, besides the two Python2 installations.\n\nPython 3.7.3 on \/usr\/bin\/python3\nPython 3.8.2 on \/usr\/local\/bin\/python3\nPython 2.7.16 on \/usr\/bin\/python (I guess this is the Apple version)\nPython 2.7.17 on \/usr\/local\/bin\/python\n\nThe problem comes when I'm trying to use the 'Extract Method' on the 3.8.2 and it tells me to update pip. How do I choose the installation to update pip?\nWhen I run \"sudo pip install --upgrade pip\" it only goes to the python 2 apple version. But I can't update the pip on the other installations. \nThanks in advance.","AnswerCount":3,"Available Count":1,"Score":0.0665680765,"is_accepted":false,"ViewCount":847,"Q_Id":61434147,"Users Score":1,"Answer":"First new version of MacOs are built in python2 and python3 in usr\/bin\n\njust leave them and install newest python\n\nthen edit path which in \/etc\/paths put 'usr\/local\/bin' on the first line\n\nenjoy! now all your python3 is run in usr\/local\/bin which is newest and installed by yourself. Also pip is work too. if you wanna upgrade your python just run brew upgrade. It's best way to use python on mac and DONT DELETE default python2 and 3 just leave them","Q_Score":4,"Tags":"python,python-3.x,macos,python-2.7,pip","A_Id":63864726,"CreationDate":"2020-04-25T23:57:00.000","Title":"Two different Python3 and Two different Python2 installations on MacOS Catalina","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have an exe file that I made with pyinstaller and when I try to run it it gives me this error:\n\nModuleNotFoundError: No module named 'pkg_resources.py2_warn' [50728]\nFailed to execute script pyi_rth_pkgres\n\nthe python script contains a scheduler using BlockingScheduler from apscheduler.schedulers.blocking that works when I execute it as a python script, but return this error as an exe file.","AnswerCount":1,"Available Count":1,"Score":0.3799489623,"is_accepted":false,"ViewCount":1225,"Q_Id":61445102,"Users Score":2,"Answer":"Saw this answer on stackoverflow (can't remember the url):\nHere's what you need to do:\nStep:1 pip uninstall pyinstaller\nStep:2 pip install https:\/\/github.com\/pyinstaller\/pyinstaller\/archive\/develop.zip\nGoodLuck","Q_Score":1,"Tags":"python,exe,pyinstaller,scheduler","A_Id":61541553,"CreationDate":"2020-04-26T17:28:00.000","Title":"pyinstaller failed to execute script pyi rth pkgres","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Installing \u201cplatformio-ide-terminal@2.10.0\u201d failed.Hide output\u2026\n\nnode-pty-prebuilt-multiarch@0.9.0-beta21.legacy install C:\\Users\\saqib\\AppData\\Local\\Temp\\apm-install-dir-120327-4684-1n45eei.2yxd\\node_modules\\platformio-ide-terminal\\node_modules\\node-pty-prebuilt-multiarch\n  prebuild-install || node scripts\/install.js\n\nC:\\Users\\saqib\\AppData\\Local\\Temp\\apm-install-dir-120327-4684-1n45eei.2yxd\\node_modules\\platformio-ide-terminal\\node_modules\\node-pty-prebuilt-multiarch>if not defined npm_config_node_gyp (node \"C:\\Users\\saqib\\AppData\\Local\\atom\\app-1.45.0\\resources\\app\\apm\\node_modules\\npm\\node_modules\\npm-lifecycle\\node-gyp-bin\\....\\node_modules\\node-gyp\\bin\\node-gyp.js\" rebuild )  else (node \"C:\\Users\\saqib\\AppData\\Local\\atom\\app-1.45.0\\resources\\app\\apm\\node_modules\\npm\\node_modules\\node-gyp\\bin\\node-gyp.js\" rebuild ) \nprebuild-install WARN install unexpected end of file\ngyp ERR! configure error \ngyp ERR! stack Error: Can't find Python executable \"C:\\Users\\saqib\\AppData\\Local\\Programs\\Python\\Python38-32\\python.EXE\", you can set the PYTHON env variable.\ngyp ERR! stack     at PythonFinder.failNoPython (C:\\Users\\saqib\\AppData\\Local\\atom\\app-1.45.0\\resources\\app\\apm\\node_modules\\npm\\node_modules\\node-gyp\\lib\\configure.js:492:19)\ngyp ERR! stack     at PythonFinder. (C:\\Users\\saqib\\AppData\\Local\\atom\\app-1.45.0\\resources\\app\\apm\\node_modules\\npm\\node_modules\\node-gyp\\lib\\configure.js:517:16)\ngyp ERR! stack     at C:\\Users\\saqib\\AppData\\Local\\atom\\app-1.45.0\\resources\\app\\apm\\node_modules\\npm\\node_modules\\graceful-fs\\polyfills.js:284:29\ngyp ERR! stack     at FSReqWrap.oncomplete (fs.js:182:21)\ngyp ERR! System Windows_NT 10.0.16299\ngyp ERR! command \"C:\\Users\\saqib\\AppData\\Local\\atom\\app-1.45.0\\resources\\app\\apm\\bin\\node.exe\" \"C:\\Users\\saqib\\AppData\\Local\\atom\\app-1.45.0\\resources\\app\\apm\\node_modules\\npm\\node_modules\\node-gyp\\bin\\node-gyp.js\" \"rebuild\"\ngyp ERR! cwd C:\\Users\\saqib\\AppData\\Local\\Temp\\apm-install-dir-120327-4684-1n45eei.2yxd\\node_modules\\platformio-ide-terminal\\node_modules\\node-pty-prebuilt-multiarch\ngyp ERR! node -v v10.2.1\ngyp ERR! node-gyp -v v3.7.0\ngyp ERR! not ok \nnpm WARN enoent ENOENT: no such file or directory, open 'C:\\Users\\saqib\\AppData\\Local\\Temp\\apm-install-dir-120327-4684-1n45eei.2yxd\\package.json'\nnpm WARN apm-install-dir-120327-4684-1n45eei.2yxd No description\nnpm WARN apm-install-dir-120327-4684-1n45eei.2yxd No repository field.\nnpm WARN apm-install-dir-120327-4684-1n45eei.2yxd No README data\nnpm WARN apm-install-dir-120327-4684-1n45eei.2yxd No license field.\nnpm ERR! code ELIFECYCLE\nnpm ERR! errno 1\nnpm ERR! node-pty-prebuilt-multiarch@0.9.0-beta21.legacy install: prebuild-install || node scripts\/install.js\nnpm ERR! Exit status 1\nnpm ERR! \nnpm ERR! Failed at the node-pty-prebuilt-multiarch@0.9.0-beta21.legacy install script.\nnpm ERR! This is probably not a problem with npm. There is likely additional logging output above.\nnpm ERR! A complete log of this run can be found in:\nnpm ERR!     C:\\Users\\saqib.atom.apm_logs\\2020-04-27T04_37_34_189Z-debug.log","AnswerCount":3,"Available Count":2,"Score":-0.0665680765,"is_accepted":false,"ViewCount":1170,"Q_Id":61451860,"Users Score":-1,"Answer":"I have had similar problem befor..\nSOLUTION: Just uninstall the current version of your Atom and Install the latest Version..then try re-install the plugin (platformio-ide-terminal) this should work","Q_Score":0,"Tags":"python,atom-editor","A_Id":64240238,"CreationDate":"2020-04-27T04:43:00.000","Title":"i am not able to install platfomio-ide-terminal in ATOM","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Installing \u201cplatformio-ide-terminal@2.10.0\u201d failed.Hide output\u2026\n\nnode-pty-prebuilt-multiarch@0.9.0-beta21.legacy install C:\\Users\\saqib\\AppData\\Local\\Temp\\apm-install-dir-120327-4684-1n45eei.2yxd\\node_modules\\platformio-ide-terminal\\node_modules\\node-pty-prebuilt-multiarch\n  prebuild-install || node scripts\/install.js\n\nC:\\Users\\saqib\\AppData\\Local\\Temp\\apm-install-dir-120327-4684-1n45eei.2yxd\\node_modules\\platformio-ide-terminal\\node_modules\\node-pty-prebuilt-multiarch>if not defined npm_config_node_gyp (node \"C:\\Users\\saqib\\AppData\\Local\\atom\\app-1.45.0\\resources\\app\\apm\\node_modules\\npm\\node_modules\\npm-lifecycle\\node-gyp-bin\\....\\node_modules\\node-gyp\\bin\\node-gyp.js\" rebuild )  else (node \"C:\\Users\\saqib\\AppData\\Local\\atom\\app-1.45.0\\resources\\app\\apm\\node_modules\\npm\\node_modules\\node-gyp\\bin\\node-gyp.js\" rebuild ) \nprebuild-install WARN install unexpected end of file\ngyp ERR! configure error \ngyp ERR! stack Error: Can't find Python executable \"C:\\Users\\saqib\\AppData\\Local\\Programs\\Python\\Python38-32\\python.EXE\", you can set the PYTHON env variable.\ngyp ERR! stack     at PythonFinder.failNoPython (C:\\Users\\saqib\\AppData\\Local\\atom\\app-1.45.0\\resources\\app\\apm\\node_modules\\npm\\node_modules\\node-gyp\\lib\\configure.js:492:19)\ngyp ERR! stack     at PythonFinder. (C:\\Users\\saqib\\AppData\\Local\\atom\\app-1.45.0\\resources\\app\\apm\\node_modules\\npm\\node_modules\\node-gyp\\lib\\configure.js:517:16)\ngyp ERR! stack     at C:\\Users\\saqib\\AppData\\Local\\atom\\app-1.45.0\\resources\\app\\apm\\node_modules\\npm\\node_modules\\graceful-fs\\polyfills.js:284:29\ngyp ERR! stack     at FSReqWrap.oncomplete (fs.js:182:21)\ngyp ERR! System Windows_NT 10.0.16299\ngyp ERR! command \"C:\\Users\\saqib\\AppData\\Local\\atom\\app-1.45.0\\resources\\app\\apm\\bin\\node.exe\" \"C:\\Users\\saqib\\AppData\\Local\\atom\\app-1.45.0\\resources\\app\\apm\\node_modules\\npm\\node_modules\\node-gyp\\bin\\node-gyp.js\" \"rebuild\"\ngyp ERR! cwd C:\\Users\\saqib\\AppData\\Local\\Temp\\apm-install-dir-120327-4684-1n45eei.2yxd\\node_modules\\platformio-ide-terminal\\node_modules\\node-pty-prebuilt-multiarch\ngyp ERR! node -v v10.2.1\ngyp ERR! node-gyp -v v3.7.0\ngyp ERR! not ok \nnpm WARN enoent ENOENT: no such file or directory, open 'C:\\Users\\saqib\\AppData\\Local\\Temp\\apm-install-dir-120327-4684-1n45eei.2yxd\\package.json'\nnpm WARN apm-install-dir-120327-4684-1n45eei.2yxd No description\nnpm WARN apm-install-dir-120327-4684-1n45eei.2yxd No repository field.\nnpm WARN apm-install-dir-120327-4684-1n45eei.2yxd No README data\nnpm WARN apm-install-dir-120327-4684-1n45eei.2yxd No license field.\nnpm ERR! code ELIFECYCLE\nnpm ERR! errno 1\nnpm ERR! node-pty-prebuilt-multiarch@0.9.0-beta21.legacy install: prebuild-install || node scripts\/install.js\nnpm ERR! Exit status 1\nnpm ERR! \nnpm ERR! Failed at the node-pty-prebuilt-multiarch@0.9.0-beta21.legacy install script.\nnpm ERR! This is probably not a problem with npm. There is likely additional logging output above.\nnpm ERR! A complete log of this run can be found in:\nnpm ERR!     C:\\Users\\saqib.atom.apm_logs\\2020-04-27T04_37_34_189Z-debug.log","AnswerCount":3,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":1170,"Q_Id":61451860,"Users Score":0,"Answer":"Reset your atom to default setting by deleting .atom directory in your \/username folder. Then try to install.","Q_Score":0,"Tags":"python,atom-editor","A_Id":66188307,"CreationDate":"2020-04-27T04:43:00.000","Title":"i am not able to install platfomio-ide-terminal in ATOM","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to use pipenv in PyCharm with Python 3.8 but cannot locate the pipenv executable.\nCurrent situation :\nI have installed Python 3.8.2 on a Debian platform (actually LMDE 3), where Python 2.7 and 3.5 were already installed globally (in \/usr\/bin). I want to use Python 3.8 for development and leave th other two untouched. Python 3.8 is hence now installed in \/usr\/local\/bin.\nI have used the which command to locate the binaries and confirm the aforementioned locations.\nI have installed pip and pipenv in Python 3.8 and left untouched Python 2.7 and 3.5.\nThe python command still refers to Python 2.7 and python3 to Python 3.5. The command python3.8 refers to Python 3.8.2.\nSimilarly :\n\nwhich pip points to nowhere (pip not installed by default with Python 2.7).\nwhich pip3 points to \/usr\/bin\/pip3\nwhich pip3.8 points to \/usr\/bin\/pip3.8\n\nPipenv is installed for Python 3.5 and 3.8.2 as it is my development environment. \nI located the python module in \/home\/user_name\/.local\/lib\/python3.8\/site-packages\/pipenv\/pyenv.py\n(similar path for Python 3.5)\nThe command pipenv does not work as such. What works is python3.8 -m pipenv <something> or python3.5 -m pipenv <something>.\nHowever, running the same 'which' command for pipenv (or pipenv3, pipenv3.5, pipenv3.8) returns nothing. \nI have also found pip files (binaries ?) in \/home\/user_name\/.local\/bin\/ : pip, pip3, pip3.5, pip3.8, pipenv, pipenv-resolver . I have no idea what these are for.\nCan anybody explain me what is this mess and how I configure PyCharm correctly ?","AnswerCount":2,"Available Count":2,"Score":1.0,"is_accepted":false,"ViewCount":5057,"Q_Id":61458704,"Users Score":6,"Answer":"This does not answer the OP, but for those using Windows 10 who end up here based on the question title:\nFor a per-user installation of python 3.9, I found the executable here:\nC:\\Users\\<your username>\\AppData\\Local\\Programs\\Python\\Python39\\Scripts\\pipenv.exe","Q_Score":6,"Tags":"python,pip,pycharm,pipenv","A_Id":66871452,"CreationDate":"2020-04-27T12:15:00.000","Title":"Pycharm : locating pipenv executable","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to use pipenv in PyCharm with Python 3.8 but cannot locate the pipenv executable.\nCurrent situation :\nI have installed Python 3.8.2 on a Debian platform (actually LMDE 3), where Python 2.7 and 3.5 were already installed globally (in \/usr\/bin). I want to use Python 3.8 for development and leave th other two untouched. Python 3.8 is hence now installed in \/usr\/local\/bin.\nI have used the which command to locate the binaries and confirm the aforementioned locations.\nI have installed pip and pipenv in Python 3.8 and left untouched Python 2.7 and 3.5.\nThe python command still refers to Python 2.7 and python3 to Python 3.5. The command python3.8 refers to Python 3.8.2.\nSimilarly :\n\nwhich pip points to nowhere (pip not installed by default with Python 2.7).\nwhich pip3 points to \/usr\/bin\/pip3\nwhich pip3.8 points to \/usr\/bin\/pip3.8\n\nPipenv is installed for Python 3.5 and 3.8.2 as it is my development environment. \nI located the python module in \/home\/user_name\/.local\/lib\/python3.8\/site-packages\/pipenv\/pyenv.py\n(similar path for Python 3.5)\nThe command pipenv does not work as such. What works is python3.8 -m pipenv <something> or python3.5 -m pipenv <something>.\nHowever, running the same 'which' command for pipenv (or pipenv3, pipenv3.5, pipenv3.8) returns nothing. \nI have also found pip files (binaries ?) in \/home\/user_name\/.local\/bin\/ : pip, pip3, pip3.5, pip3.8, pipenv, pipenv-resolver . I have no idea what these are for.\nCan anybody explain me what is this mess and how I configure PyCharm correctly ?","AnswerCount":2,"Available Count":2,"Score":0.0996679946,"is_accepted":false,"ViewCount":5057,"Q_Id":61458704,"Users Score":1,"Answer":"After verifying that path was correct by using type pipenv. I was able to get it to work by clicking the file path selector in the pycharm configuration setup and selecting the path that was already selected \/home\/user_name\/.local\/bin\/pipenv. After manually selecting the already selected file location, the message went away.","Q_Score":6,"Tags":"python,pip,pycharm,pipenv","A_Id":63294262,"CreationDate":"2020-04-27T12:15:00.000","Title":"Pycharm : locating pipenv executable","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am new on Linux, OpenCV and deep learning, in fact I just started with these things a couple weeks ago.\nIn my reserches I found a lot of people saying that is much better use OpenCV on Linux than on Windows, so, that is what I am doing. I installed an Ubuntu distro on a VM and I am using it to study.\nBut today a doubt came up into my mind. It would be possible to write an OpenCV app on Linux and use it on Windows? I've read a lot and I couldn't find a satisfatory answer. \nMaybe this is a silly question, but as I said, I am very new on all of that stuff.\nFor now, I am just studying and I am really feeling like learning Linux, but when I'll really start to build my applications it will be important to being able to run them on Windows.\nSo, if this is possible, is there some specific things that I should do to make the trasition easier?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":93,"Q_Id":61461250,"Users Score":1,"Answer":"There is absolutely no difference in the syntaxes of opencv between different operating systems. (Well, I used both and didn't bother me.) So it should be fine as long as you have the same version of Opencv installed as there are differences between opencv 3x and opencv 4x.","Q_Score":0,"Tags":"python,linux,windows,opencv,deep-learning","A_Id":61486912,"CreationDate":"2020-04-27T14:33:00.000","Title":"Is it possible to build an OpenCV app on Linux and execute it on Windows?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I would like to transfer an app from server 1 to server 2 (size of the app 700Mb)\nfirst test : try to pack to build a w2p package --> internal error  (it works for app 400 Mb)\nSecond test : i create a tar from server 1 and i transfer to server 2 --> the app tells me no function (note that she works very well on server 1)\nServer 1 : debian jessie\nServer 2 : debian buster\nAny idea ?\nthank you very much","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":50,"Q_Id":61462836,"Users Score":0,"Answer":"what i would suggest is compile the app and then transfer however you would like to another server. that will solve 700mb issue and keeps integrity of app files.","Q_Score":0,"Tags":"python,web2py","A_Id":61647174,"CreationDate":"2020-04-27T15:50:00.000","Title":"Transfer a big app web2py to a new server","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"My client has provided me with a Python console application which performs some work and writes the result into a .txt file. My task is to write a Windows service which reads that particular .txt file and performs further actions.\nI used C# on .NET to write the service. My solution contains 3 projects:\n\nThe logic layer project.\nThe Windows service layer project.\nA test app layer project, used for debugging and other purposes.\n\nBoth the Windows service layer and test app layer are using the logic layer for core functionality. When I run the application through the test layer, everything works perfectly, but whenever I try to run the application through the service, the Python standalone application that the service launches doesn't write any output files. I could see that the Python app runs in the task manager, but there's no output anywhere. I believe the Python code is crashing but I couldn't get the exact reason.\nI've tried the following ways to debug the issue:\n\nSearched the Windows and System32 directories for any related output files, just to consider the possibility of the service having these directories as the default working directory.\nUsed absolute paths in the service code to make sure that the Python part is not writing output files to some unknown location.\nHad the client implement passing the output directory to the Python code through command line arguments.\nWrote a mock console app in C# which writes a file, tried to call it through the service, but it worked fine and wrote the file as expected.\nSuspected the standard IO could be causing the Python application to crash and thus used the standard IO in my mock program, but it worked without any issues.\nTried giving a long task to the Python code, which should've taken about 30 minutes to execute completely, but the Python script ran and closed immediately, which essentially is reliable proof of the theory that it crashes at some point.\nTried running the service with my unelevated Windows user instead of the Local System pseudouser.\nTried configuring the service to be able to interact with the desktop.\n\nI am all out of ideas here. Any direction I should also search in?\nJust a note, if that matters: I am using System.Diagnostics.Process to launch the Python script.","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":288,"Q_Id":61464820,"Users Score":0,"Answer":"If it works from your test app, it sounds like a permissions issue. What security context \/ user is the windows service running as, and does that user have permission to write to the filesystem where you are expecting it? Have you tried using a full path to the output file to be sure where it is expected? \nI'd be inclined to write a tiny python app that just saves \"hello world\" to a file, and get that to work from a windows service, then build up from there.","Q_Score":0,"Tags":"python,c#,.net,windows-services","A_Id":61465997,"CreationDate":"2020-04-27T17:32:00.000","Title":"Python program crashes when run through a Windows service","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"My client has provided me with a Python console application which performs some work and writes the result into a .txt file. My task is to write a Windows service which reads that particular .txt file and performs further actions.\nI used C# on .NET to write the service. My solution contains 3 projects:\n\nThe logic layer project.\nThe Windows service layer project.\nA test app layer project, used for debugging and other purposes.\n\nBoth the Windows service layer and test app layer are using the logic layer for core functionality. When I run the application through the test layer, everything works perfectly, but whenever I try to run the application through the service, the Python standalone application that the service launches doesn't write any output files. I could see that the Python app runs in the task manager, but there's no output anywhere. I believe the Python code is crashing but I couldn't get the exact reason.\nI've tried the following ways to debug the issue:\n\nSearched the Windows and System32 directories for any related output files, just to consider the possibility of the service having these directories as the default working directory.\nUsed absolute paths in the service code to make sure that the Python part is not writing output files to some unknown location.\nHad the client implement passing the output directory to the Python code through command line arguments.\nWrote a mock console app in C# which writes a file, tried to call it through the service, but it worked fine and wrote the file as expected.\nSuspected the standard IO could be causing the Python application to crash and thus used the standard IO in my mock program, but it worked without any issues.\nTried giving a long task to the Python code, which should've taken about 30 minutes to execute completely, but the Python script ran and closed immediately, which essentially is reliable proof of the theory that it crashes at some point.\nTried running the service with my unelevated Windows user instead of the Local System pseudouser.\nTried configuring the service to be able to interact with the desktop.\n\nI am all out of ideas here. Any direction I should also search in?\nJust a note, if that matters: I am using System.Diagnostics.Process to launch the Python script.","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":288,"Q_Id":61464820,"Users Score":0,"Answer":"Thanks to the help from timhowarduk, I finally was able to get to the root cause of the problem. The python script was looking for a configuration file, and when it was running from the Windows Service, it was looking for that config file in System32. \n\nAll the windows services are run from System32.\n\nThe above caused the python script to search in System32 since it was running as part of the windows service. I guess I might just ask the client to edit the python script to read config from the windows service application directory.","Q_Score":0,"Tags":"python,c#,.net,windows-services","A_Id":61488405,"CreationDate":"2020-04-27T17:32:00.000","Title":"Python program crashes when run through a Windows service","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I've tried to run code on the cmd but it isn't working. I'm using windows7 and I changed the path from the default but I wrote the directory on the cmd. Can anyone help me?","AnswerCount":2,"Available Count":2,"Score":0.0996679946,"is_accepted":false,"ViewCount":31,"Q_Id":61477754,"Users Score":1,"Answer":"python3 yourfilename.py\nThe above command can run your code, makesure you are at the project directory.","Q_Score":0,"Tags":"python","A_Id":61477795,"CreationDate":"2020-04-28T10:13:00.000","Title":"How can I run Python program on cmd?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I've tried to run code on the cmd but it isn't working. I'm using windows7 and I changed the path from the default but I wrote the directory on the cmd. Can anyone help me?","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":31,"Q_Id":61477754,"Users Score":0,"Answer":"make sure python in your system path;\nset python root path to system environment variable\uff1bthen you can run 'python filename.py' ex","Q_Score":0,"Tags":"python","A_Id":61478015,"CreationDate":"2020-04-28T10:13:00.000","Title":"How can I run Python program on cmd?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"i've been looking for answers in stackoverflow and over all the web but still don't get it, i started a new project and upload it to a repository in github, all this i did it from a MAC computer, everything fine until here, but... i tried cloning my project in an Windows computer and i can not activate my venv, to activate the venv in MAC there is a bin file, so i type the following commands in the terminal, 'source bin\/activate' and it works fine, but i understand that in windows there is a Script folder which i dont have because i created and activated my project for the first time in MAC, there is a way which is deleting the venv directory everytime i clone my project in a different OS but i dont think that's a good pratice, so i would like to know which is the correct way of doing this, which are your recommendations? Thanks.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":186,"Q_Id":61491080,"Users Score":1,"Answer":"A virtual environment still has references back to the host machine's python installation. Since Macs and PCs have different locations for where python is located\/installed, besides the fact that a virtualenv is much different on a PC than on a Mac (even though they accomplish the same task), a virtualenv created on a Mac will not work out of the box if you transfer the files to a PC. \nI recommend adding your virtualenv's folder to your gitignore, then just creating separate environments on your Mac and PC.","Q_Score":0,"Tags":"python,django","A_Id":61491136,"CreationDate":"2020-04-28T22:29:00.000","Title":"virtual env problems while cloning projects from github in different os","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I was thinking in how to include some metadata in my script files in a way that other scripts could process this information without interfering in its .\/ execution.\nYAML Front Matter came to my mind, but obviously its --- syntax produce error either in #!\/bin\/bash as in #!\/usr\/bin\/python3, for example.\n\nIs there some simple way to allow a non-comment block (as Front Metter's one) to be ignored by script .\/ execution?\nOr any other known way to make a file carry some metadatas possible to be accessed anyway without interfer in its generic execution?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":61,"Q_Id":61494337,"Users Score":1,"Answer":"If you can't use a comment, you could use a Python object of some kind.\nThis is a bit like the way doctstrings work in Python: The string is an expression but it's evaluation doesn't have side effects and Python uses it as metadata.\nHowever if you need a shebang (#!...) that does have to come first. Your metadata processor will have to skip that line.","Q_Score":0,"Tags":"python-3.x,file,scripting,metadata,yaml-front-matter","A_Id":61494413,"CreationDate":"2020-04-29T04:38:00.000","Title":"Is possible to have a Front Matter header in a script?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Python is not installed and The terminal shell path \"cmd.exe\" does not exist. (+select python interpreter, as an addition to the first mistake)\nThis 2 errors appeared in my vscode...Could somebody help me, please. I am desperate\u2026\nFirst things first:I have already worked in python using pycharm and vscode. Then by mistake I made some incorrect changes in the path variable. After that everything stopped working. \nThings that I have already tried so far\n-> complete deletion of python and vscode and reinstallation both of it; \n-> using anaconda; working with paths, made changes like \/ -> \\ -> and vice versa; \n-> When i installed python and the VScode editior, i checked the box on the first window asking to add to the path.\nNothing worked\u2026\nMy path variable values are:\n(Path for user):\u00a0\nC:\/Users\/name\/AppData\/Local\/Programs\/Python\/Python38-32\/;C:\/Users\/name\/AppData\/Local\/Programs\/Microsoft VS Code\/bin; C:\/Users\/name\/AppData\/Local\/Programs\/Python\/Python38-32\/python.exe; C:\/Users\/name\/AppData\/Local\/Programs\/Microsoft VS Code\/Code.exe; C:\/Windows\/System32\/cmd.exe;\n(Path variable values for System):\nC:\/Users\/name\/AppData\/Local\/Programs\/Microsoft VS Code\/Code.exe; C:\/Windows\/System32\/cmd.exe;C:\/Users\/name\/AppData\/Local\/Programs\/Microsoft VS Code\/bin\nI crave for all advices, you can share with!\u00a0\nI would like to work out with my paths again. For it, I ask somebody who also works in Windows, to copy his\/her paths and send it to me. I will try to find mistakes or missing stuffs. If it is also doesn't work\u2026Well, I have no idea. I will thankfully read all your advises. Looking forward for your answers. Thanks in advance.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":234,"Q_Id":61499735,"Users Score":0,"Answer":"It looks like you specified the path to specific files in your PATH variable. Instead, change those to point to the directories where those files exist.","Q_Score":0,"Tags":"python,visual-studio-code,path","A_Id":61531052,"CreationDate":"2020-04-29T10:33:00.000","Title":"Python is not installed and The terminal shell path \"cmd.exe\" does not exist","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am having issues installing Anaconda on my Raspberry Pi.\nWhen I attempt to install Anaconda I get this message:\nAnaconda3-20.02-Linux-x86_64.sh: line 404:\/home\/ubuntu\/anaconda3\/conda.exe: cannot execute binary file: Exec format error\nWhen I try installing installing mini conda i get this:\nERROR:\ncannot execute native linux-armv7l binary, output from 'unman -a' is:\nLinux user 5.4.0-1008-raspi #8-Ubuntu SMP Wed Apr 8 11:13:06 UTC 2020 aarch64 aarch64 aaarch64 GNU\/Linux","AnswerCount":3,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":23567,"Q_Id":61508312,"Users Score":3,"Answer":"The problem is it looks like you're using the wrong shell script to install:\nAnaconda3-20.02-Linux-x86_64.sh\nThe Raspberry PI 4 has ARM architecture and is capable of running ARM-64 instructions if you have the 64-bit version of Ubuntu installed.  You can check with uname -a and if you see aarch64 you can run the 64-bit instruction set.\nIt looks like your distribution is for 32-bit ARM, due to the armv7l output from uname so you would want to look for packages with the armv7l suffix.\nThere is not very good ARM support right now with a lot of software but hopefully that will change now that Apple is moving to ARM-64.\nIf Anaconda offers a shell script it should look like this:\nFor 32-bit ARM:\n\nAnaconda3-20.02-Linux-armv7l.sh\nAnaconda3-20.02-Linux-aarch32.sh\n\nFor 64-bit ARM:\n\nAnaconda3-20.02-Linux-arm64.sh\nAnaconda3-20.02-Linux-aarch64.sh","Q_Score":5,"Tags":"python-3.x,ubuntu,anaconda,raspberry-pi4","A_Id":63864100,"CreationDate":"2020-04-29T17:49:00.000","Title":"Installing Anaconda on Raspberry Pi 4 with Ubuntu 20.04","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a few python projects, that I am the only one working on. The environment is setup via venv. However, I cannot use the remote Python venv environment locally. I am newer to python. Locally, I am mounting the remote directory via ExpanDrive, connecting via SFTP on my mac.\nReason for this setup is some scripts are running via CRON periodically and, centralization. Appreciate any suggestions!","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":47,"Q_Id":61508766,"Users Score":0,"Answer":"Figured it out.\nInstalled remote-ssh in vscode and that solved the problem.","Q_Score":0,"Tags":"python-3.x,remote-server","A_Id":61512602,"CreationDate":"2020-04-29T18:12:00.000","Title":"How to work on a Python project, on a remote linux server, locally on a macbook?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"In Django I need to run a shell command at some point. The command takes 6-10 minutes so I like to get live stdout from the command in my Django View in order to live track the command.\nI now how to run the command and get live output with subprocess but I have no clue of how to pass the live output to the views.","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":87,"Q_Id":61511376,"Users Score":1,"Answer":"I would suggest running the sub process into cron and storing the output to a file\/db where you can get the progress from the view. Another option is to go for threading using celery. \nThe problem is that the view is not persistent, so you can not keep the hook to the output pipe across http requests.","Q_Score":2,"Tags":"python,django,subprocess","A_Id":61511557,"CreationDate":"2020-04-29T20:47:00.000","Title":"Get live output of subprocess command","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I read through the descriptions of each command, but the descriptions for each command were exactly the same, so I didn't understand how those two commands work differently in Unix-like systems.\nCould anyone explain the difference?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":5294,"Q_Id":61521156,"Users Score":6,"Answer":"The Python3 command was introduced because the python command pointed to python2. Since then, Python3 has become the default and thus python points to python3 on most but not all systems. So, most developers explicitly use python2 and python3 as to not run into issues on other systems.","Q_Score":3,"Tags":"python,python-3.x,unix,command","A_Id":61521213,"CreationDate":"2020-04-30T10:21:00.000","Title":"What is the difference between the python and python3 commands in unix-like systems?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am using Camelot in a Python script, which we package as an executable using pyinstaller.\nThis works fine on: a Windows 10 desktop, a Windows Server, even in a Docker container using mcr.microsoft.com\/windows:1909.\nWe are trying to get this working in a Docker container just using Windows Server Core 2019 (mcr.microsoft.com\/windows\/servercore:ltsc2019) but we are getting the dreaded missing DLL problem which seems to affect some uses of OpenCV.\n\\pyimod03_importers.py\", line 627, in exec_module\n  File \"lib\\site-packages\\cv2__init__.py\", line 9, in \nImportError: DLL load failed: The specified module could not be found.\nI gather that this is because the Windows Media Feature Pack is not part of the server core, and I don't think is available as an add-on option.\nOur question is this: will it be possible to run this script on Windows Server Core (plus a few other components) or do we need to run an image based on a full windows install?","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":231,"Q_Id":61540133,"Users Score":1,"Answer":"I have reached the same problem running ffmpeg on windows core. It says mfplat.dll is missing. That file is a part of Media Feature Pack, which is absent for windows core installation.\nI just extracted that file from windows server 2019 full version and putted near ffmpeg.exe. It solved problem.\nI guess, you can go the same way. Identify required dll files first, then just copy from full version.","Q_Score":0,"Tags":"python,docker,opencv,server-core","A_Id":66291258,"CreationDate":"2020-05-01T09:45:00.000","Title":"Is it possible to run the Python Camelot library on Windows Server Core?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to make a stopwatch where I use os to clear the terminal for the ticking numbers, but os.system('cls') does not work on idle or on mac. Are there any alternatives I can use? I usually use repl because I am doing this for class.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":611,"Q_Id":61553654,"Users Score":0,"Answer":"os.system('clear') is the alternative for macOS and repl, however on repl you could also import replit and then call replit.clear() to clear the terminal.","Q_Score":0,"Tags":"python","A_Id":61553765,"CreationDate":"2020-05-02T02:17:00.000","Title":"Alternative for os.system('cls') for python on mac","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm currently using elastic beanstalk and apscheduler to run Pandas reports everyday automatically on it. The data set is getting larger and i've already increased the memory size 3x. \nElastic Beanstalk is running Dash - dashboard application and runs the automated Pandas reports once every night. \nI've tried setting up AWS Lambda to run Pandas reports on there but I couldn't figure out how to use it. \nI'm looking for the most cost-effective way to run my reports without having to increase memory usage on Beanstalk. When I run it locally it takes 1gb but running it on beanstalk, it's using more than 16gb. \nCurious if someone else has a better option or process how they automatically run their Pandas reports.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":43,"Q_Id":61566053,"Users Score":0,"Answer":"Create an .exe using Pyinstaller\nSchedule .exe on Task Scheduler on computer\nCheaper than scaling AWS Beanstalk resources which use more resources calculating pandas than your computer locally at least for my case.","Q_Score":0,"Tags":"python,pandas,amazon-web-services,amazon-elastic-beanstalk","A_Id":63367773,"CreationDate":"2020-05-02T20:44:00.000","Title":"What options are there to setup automatic reporting processes for Pandas on AWS?","Data Science and Machine Learning":1,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"On my Pi (with the lite text only Linux on it) a Python-Program is started through rc.local! When I log in the (headless) Pi then I do not see the output of the program (simple print-commands). I can see that Python3 is running when I use \"pa -S\" and \"top\", but I cannot switch to the output from the program.\nHow can I make the output visible in the terminal-window like it is when I start the program straight from the command line? \nThanks and cheers, \nUlrich","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":59,"Q_Id":61566441,"Users Score":0,"Answer":"You can not do that, you must write the output into a file with redirection.\nIn the rc.local, you can write: your_program  >> logfile_name  2>&1\nBut the logfile must be sometimes deleted.\nSearch for [linux] redirection!","Q_Score":0,"Tags":"python,terminal,process,visible","A_Id":61566935,"CreationDate":"2020-05-02T21:19:00.000","Title":"How to watch an automatically startet python script on raspberry \/ raspian?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am confused about how to realize the data validation in event sourced micro-service architecture.  \nLet sum up some aspects that related to the micro-services.\n1. Micro-services must be low coupled.\n2. Micro-services better to be domain oriented  \nThen due to tons of materials in the internet and the books in DDD (Domain Driven Design)\nI create the next event sourced micro-service architecture.\nComponents\n1. API getaway to receive the REST calls from the clients and transform them into the commands.\n2 Command handler as a service. Receive the commands from API getaway make the validations. Save the events to the event store and publish events to the event bus.\n3. Event store is the storage for all events in the system. Allows us to recreate the state of the app. The main state of truth.\n4. Micro-services is small services responsible to handle the related to its domain event. Make some projections to the local private databases. Make some events too.\nAnd I have questions that I could not answer both by myself and the internet.\n1. What is actually aggregates. They are the class objects\/records in databases as I think or what?\n2. Who carry about aggregates. I found example that is some cases command handler use them. But in that way if aggregates stored in the private micro-services databases then we will have very high coupling between the command handler and the each of micro-services and it is wrong due to micro-service concept.  \nTo sum up.\nI am confused about how to implement aggregation in event source micro service architecture.\nFor example let focus on the user registration implementation in event source micro-service architecture.  \nWe have the user domain so the architecture will be next.\nAPI getaway\nCommand handler\nAuth micro-service\nUser micro-service \nPlease explain me the realization of command validation due to example above.","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":317,"Q_Id":61583047,"Users Score":1,"Answer":"Command handler as a service\n\nI think this is the main source of your confusion.\nThe command handler isn't normally a service in itself.  It is a pattern.  It will normally be running in the same process as the \"microservice\" itself.\nIE: the command handler reads a message from so storage, and itself invokes the microservice logic that computes how to integrate the information in this message into its own view of the world.\n\nWhat is actually aggregates\n\n\"Aggregate\" is a lifecycle management pattern; an aggregate is a graph of one or more domain entities that together will establish and maintain some interesting invariant.  It's one of three patterns described in detail in the Domain Driven Design book written by Eric Evans.\nThe command handler plus your aggregate is, in a sense, your microservice.  The microservice will typically handle messages for several instances of a single aggregate - it will subscribe to all of the input messages for that kind of aggregate.  The \"handler\" part just reads the next message, loads the appropriate instance of the aggregate, then executes the domain logic (defined within the aggregate entities) and stores the results.","Q_Score":2,"Tags":"python,architecture,domain-driven-design,microservices,event-sourcing","A_Id":61585106,"CreationDate":"2020-05-03T23:39:00.000","Title":"Command payload validation in event sourced micro-service architecture","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I have installed Python 3.8.2 in my Windows 10 laptop\nWhen I run the command 'python' in the command prompt, it gives me a blank response and goes back to the command prompt.\nHowever when I run the command 'py -3' in the command prompt, python is launched.\nWhat can be the reason for this. Is there anyway I can launch python using the 'python' command in cmd?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":33,"Q_Id":61587421,"Users Score":0,"Answer":"why does it need to be python? py is basically the same thing. Looks like you didn't check ambient variable in python installation. Just add python folder in PATH ambient variable  and you're ready to go","Q_Score":0,"Tags":"python","A_Id":61589148,"CreationDate":"2020-05-04T07:48:00.000","Title":"Not able to run python from command prompt using 'python' command; it only takes 'py -3'","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'd like to mix C code with Python GUI libraries. I thought about creating C library and using it with ctypes. How to create library for both Linux and Windows at the same time? On Linux, I simply use gcc -fPIC -shared -o lib.so main.c, but how to do that for Windows?","AnswerCount":1,"Available Count":1,"Score":-0.1973753202,"is_accepted":false,"ViewCount":426,"Q_Id":61617538,"Users Score":-1,"Answer":"Many IDE for C\/C++ already prepared DLL program template,such as Visual Studio,Code::Blocks,VC++6.0 etc.. Using DLL files is similar to using SO files","Q_Score":0,"Tags":"python,c,python-3.x","A_Id":61617752,"CreationDate":"2020-05-05T16:01:00.000","Title":"Combining C with Python","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a Django dashboard application I wish to view from my browser. Django is running in a Docker container on one of Google's Compute Engine instances. The GCE instance is on a Google VPC, on which I've added firewall rules to open Django's port 8000. I've added my IP to Django's ALLOWED_HOSTS in settings.py. The container's logs indicate that it is running fine, yet when I access the GCE instance's IP from my browser, I am immediately unable to connect. I can ping the instance from my command line just fine. Is there something I'm missing here? Been stuck on this for a few hours now.\nNote: I have the Django container running on a \"Docker network\" in order for Celery to communicate with a RabbitMQ container. This was recommended to me somewhere, but I am unfamiliar with Docker networks or if they are causing the issue.","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":471,"Q_Id":61621434,"Users Score":2,"Answer":"I have found the solution after a bit more trial-and-error. It was not very intuitive so I'll post here in case I can help anyone else.\nWhat fixed the issue for me was exposing the port (8000) on the command line when running the app's container:\ndocker run -p 8000:8000 ...\nThe reason this eluded me for so long was because I already expose the port in the Dockerfile: EXPOSE 8000, and when I run docker ps to list the ports exposed on each container, the container appeared to already be port-exposed: 8000\/tcp. However, what I didn't know is that it is supposed to look like: 0.0.0.0:8000->8000\/tcp.\nAnyways, hope this helps someone else out.","Q_Score":2,"Tags":"python,django,docker,google-cloud-platform,google-compute-engine","A_Id":61622310,"CreationDate":"2020-05-05T19:29:00.000","Title":"How do I access Django running on a Google Compute Engine VM from my browser?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"is there any solution to start a Windows PC with a Python program at a certain time?\nI can't find any answer but I heard of a program with this function, but the thing is that i want to program mine myself.","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":33,"Q_Id":61622659,"Users Score":1,"Answer":"No. Python runs within your operating system, so it can't run when your computer is turned off (barring a really odd BMC or something). The normal way of doing this is by configuring it in your BIOS\/UEFI settings.","Q_Score":0,"Tags":"python,python-3.x,windows,python-2.7,startup","A_Id":61622702,"CreationDate":"2020-05-05T20:39:00.000","Title":"How to start Windows with a Python script?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"As I am trying to connect to Google's BigQuery environment from a Python notebook using the google.cloud library, the response from the server is to visit a link that generates a code and to \"Enter the authorization code:\" . However, as this response is just text, I do not know how to pass the code back to the server response. I am running this notebook in a Databricks environment.\nDoes anyone know how I can push this code back to the server and complete the authorization?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":70,"Q_Id":61629225,"Users Score":0,"Answer":"It doesnn't look like you are using the correct . The flow which you mentioned will work on a UI not not with any automation . I suggest you to share more dtails here and also check for more documenataion on the same .","Q_Score":0,"Tags":"python,api,google-cloud-platform,databricks","A_Id":62095168,"CreationDate":"2020-05-06T07:01:00.000","Title":"Passing authorization code to Python Notebook","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I change the UE_PYTHON_DIR to \"E:\\python3.7Installer\\python-3.7.7-amd64.exe\"\nThis is a python installer, and I rebuild the engine, but it is not working - my project is still using 2.7.\nHoping for an answer\nThanks","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":318,"Q_Id":61631906,"Users Score":0,"Answer":"I solved this problem myself\nit is a silly question\nthe UE_PYTHON_DIR should point to installed position\nsuch as \"C:\\Users\\xxxx\\AppData\\Local\\Programs\\Python\\Python37-32\"\nand rebulid engine\nrebuild myProject\nsolved","Q_Score":0,"Tags":"python-3.x,python-2.7,python-3.7,unreal-engine4","A_Id":61772664,"CreationDate":"2020-05-06T09:35:00.000","Title":"How to switch Python version from 2.7 into 3.7 in unreal","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I created a very simple batch file that works when I double click the file, but if I try to launch it by typing in the name of the batch file into Windows Run, Windows is unable to find it. If I type in the name of the folder containing the batch file, the folder opens up. \nFairly new to coding. I'm going through \"Automate the Boring Stuff\" book","AnswerCount":1,"Available Count":1,"Score":0.3799489623,"is_accepted":false,"ViewCount":599,"Q_Id":61644177,"Users Score":2,"Answer":"Run searches the folders in your global %PATH% variable for your file. It's unlikely that your script is in one of the directories mentioned in %PATH%.\nTo see the contents of PATH, type ECHO %PATH% into a command prompt. You can then move your script to one of the directories.\nAlternatively, to temporarily (for the current CMD session) add a directory to PATH, run SET PATH=%PATH%;C:\\path in your command prompt. A permanent change in PATH requires use of the registry.\nI recommend you reconsider this approach however, as launching CMD then navigating to the script's location (CD C:\\path) to then run the script is generally preferable to changing global variables.","Q_Score":1,"Tags":"python,windows,batch-file","A_Id":61644411,"CreationDate":"2020-05-06T19:55:00.000","Title":"Windows Run can't find batch file","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"So, I have a project tested using pytest and using the pytest-cov module to report coverage.\nSome of the code involves bootstrapping and configuration and the canonical way of running this is starting via a shell script. The current unit tests use the subprocess module to test running this shell script on mocked data. I would like the code report against the coverage and I am trying specifically to avoid\n1) Heavily modifying the wrapper to support the test scenario. Also, this runs the risk of doing 2).\n2) Running the boostrap code outside the wrapper (e.g. by forking the process and running the code directly), since I want these tests to be as realistic as possible.\nIs there any (canoical, Pythonic) way of propagating the coverage collection to all subproceses, even when launched using subprocess.Popen? I can easily solve the problem using a hack, so this is not something I am looking for.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":339,"Q_Id":61678372,"Users Score":0,"Answer":"This actually works out of the box. The reason for me thinking this did not work was that the path mappings w.r.t. the Docker volumes were incorrect, as the modules loaded by the subprocess were bind mounted in the container. Coverage is only reported when the paths match up exactly.","Q_Score":0,"Tags":"python,pytest,coverage.py","A_Id":62195477,"CreationDate":"2020-05-08T11:42:00.000","Title":"Measure coverage across subprocesses","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Is there a Python3 library which will determine if we are running on GCP or another cloud architecture as opposed to a native architecture?\nSomething like platform.platform() or jaraco.docker.is_docker(), but for the cloud?","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":119,"Q_Id":61690480,"Users Score":0,"Answer":"No, simply because the Python codes actually running in a virtual machine in the cloud.","Q_Score":0,"Tags":"python-3.x,google-cloud-platform,architecture,cloud","A_Id":61690531,"CreationDate":"2020-05-09T01:05:00.000","Title":"Python3 Determine if a Program is Running on GCP?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"How to open an .ipynb file on a Mac and use it?\nWhich apps is needed for that or what are your recommendations?","AnswerCount":3,"Available Count":1,"Score":0.2605204458,"is_accepted":false,"ViewCount":21558,"Q_Id":61695073,"Users Score":4,"Answer":"you need to install jupyter you can do it using: pip install jupyter\nand run it in terminal with the command jupyter notebook this will open a browser window where you can view and run juputer notebooks\nYou can also open these notebooks in pyCharm and Visual Studio Code (after installing the python extension from microsoft)","Q_Score":0,"Tags":"python,macos,visual-studio-code,jupyter-notebook","A_Id":61695277,"CreationDate":"2020-05-09T10:12:00.000","Title":"How to open ipynb files on a Mac?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"so I am trying to do some background job to run in my flask app , and in order to run the worker, I needed to use cygwin instead of my windows terminal. My application use MongoDb Atlas for documents storage and it works perfectly fine when I \"flask run\" it from my cmd . But I got the error once I run it or run the worker from cygwin. It is to note that I whitelisted my IP adress and installed the dnspython package , and still got the error. \nAny suggestions about what could be the problem? I don't seem to find any answer in previous asked questions . Thank you.","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":1520,"Q_Id":61700528,"Users Score":0,"Answer":"I hit and resolved this same issue hit today w\/ cygwin, python3.8, dnspython 1.16.0 by updating to dnspython 2.0.0 and ensuring there was a valid \/etc\/resolv.conf in place.","Q_Score":0,"Tags":"python,cygwin,mongodb-atlas,python-rq","A_Id":63003420,"CreationDate":"2020-05-09T16:59:00.000","Title":"I am getting this error The DNS operation timed out after 20.000144004821777 seconds when running my app in cygwin instead of my windows terminal","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"so I am trying to do some background job to run in my flask app , and in order to run the worker, I needed to use cygwin instead of my windows terminal. My application use MongoDb Atlas for documents storage and it works perfectly fine when I \"flask run\" it from my cmd . But I got the error once I run it or run the worker from cygwin. It is to note that I whitelisted my IP adress and installed the dnspython package , and still got the error. \nAny suggestions about what could be the problem? I don't seem to find any answer in previous asked questions . Thank you.","AnswerCount":2,"Available Count":2,"Score":0.0996679946,"is_accepted":false,"ViewCount":1520,"Q_Id":61700528,"Users Score":1,"Answer":"It's because of your dynamic DNS configuration from your ISP. make it static or you can use googleDNS server which is 8.8.8.8 or 8.8.4.4 as your DNS servers.","Q_Score":0,"Tags":"python,cygwin,mongodb-atlas,python-rq","A_Id":65537656,"CreationDate":"2020-05-09T16:59:00.000","Title":"I am getting this error The DNS operation timed out after 20.000144004821777 seconds when running my app in cygwin instead of my windows terminal","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have an app that uses the Spacy model \"en_core_web_sm\". I have tested the app on my local machine and it works fine.\nHowever when I deploy it to Heroku, it gives me this error:\n\"Can't find model 'en_core_web_sm'. It doesn't seem to be a shortcut link, a Python package or a valid path to a data directory.\"\nMy requirements file contains spacy==2.2.4.\nI have been doing some research on this error and found that the model needs to be downloaded separately using this command:\npython -m spacy download en_core_web_sm\nI have been looking for ways to add the same to my requirements.txt file but haven't been able to find one that works!\nI tried this as well - added the below to the requirements file:\n-e git:\/\/github.com\/explosion\/spacy-models\/releases\/download\/en_core_web_sm-2.2.0\/en_core_web_sm-2.2.0.tar.gz#egg=en_core_web_sm==2.2.0\nbut it gave this error:\n\"Cloning git:\/\/github.com\/explosion\/spacy-models\/releases\/download\/en_core_web_sm-2.2.0\/en_core_web_sm-2.2.0.tar.gz to \/app\/.heroku\/src\/en-core-web-sm\nRunning command git clone -q git:\/\/github.com\/explosion\/spacy-models\/releases\/download\/en_core_web_sm-2.2.0\/en_core_web_sm-2.2.0.tar.gz \/app\/.heroku\/src\/en-core-web-sm\nfatal: remote error:\n           explosion\/spacy-models\/releases\/download\/en_core_web_sm-2.2.0\/en_core_web_sm-2.2.0.tar.gz is not a valid repository name\"\nIs there a way to get this Spacy model to load from the requirements file? Or any other fix that is possible?\nThank you.","AnswerCount":3,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":7657,"Q_Id":61702357,"Users Score":4,"Answer":"Ok, so after some more Googling and hunting for a solution, I found this solution that worked:\nI downloaded the tarball from the url that @tausif shared in his answer, to my local system.\nSaved it in the directory which had my requirements.txt file.\nThen I added this line to my requirements.txt file: .\/en_core_web_sm-2.2.5.tar.gz\nProceeded with deploying to Heroku - it succeeded and the app works perfectly now.","Q_Score":16,"Tags":"python,git,heroku,spacy","A_Id":61708393,"CreationDate":"2020-05-09T19:15:00.000","Title":"How to add a Spacy model to a requirements.txt file?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I tried to install Python 3.7.6 in windows 10. All went well until when in the cmd prompt of the computer as soon as I entered python to check the cmd prompt took me to microsoft app store and asked me to download python 3.7.7. It is not recognizing the python 3.7.6 that I had downloaded. Can any one help me with this","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":31,"Q_Id":61723562,"Users Score":0,"Answer":"it's just a case, i encountered the similar problem just download the app to get rid of the redirect to the store and it will be all ok.","Q_Score":0,"Tags":"python,installation","A_Id":61723638,"CreationDate":"2020-05-11T06:32:00.000","Title":"Python installation in Windows 10","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I tried to install Python 3.7.6 in windows 10. All went well until when in the cmd prompt of the computer as soon as I entered python to check the cmd prompt took me to microsoft app store and asked me to download python 3.7.7. It is not recognizing the python 3.7.6 that I had downloaded. Can any one help me with this","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":31,"Q_Id":61723562,"Users Score":0,"Answer":"Yeah i have experienced the same issue .\nBut i have found an alternative solution to this problem.\nDownload Anaconda and then type \"conda install python 3.7.6\" in the anaconda prompt or u can also create a custom environment by typing \"conda create -n py376 python=3.7.6 anaconda\" in the anaconda prompt and then u shall see the version of python installed on ur environment by typing \"python --version\"","Q_Score":0,"Tags":"python,installation","A_Id":61725377,"CreationDate":"2020-05-11T06:32:00.000","Title":"Python installation in Windows 10","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"We have teh need to interact with our customers AD from Jira in order to handle automatically user onboarding.\nFor that we have 2 deifferent approach :\n\nUsing Microsoft Graph API\nWe call directly from Jira Script Runner plugin using groovy script POST and GEt methods, this directly within Jira environment\nUsing Microsoft Azure SDk for python\n\nUsing this approach will need to build a python script which is store in the dedicated location on the VM and calling that scrip from Jira using Groovy script\nIn the first approach we are using only 4 API call only for how request and we are all time scripting within Jira environement.\nON the second approach we need to deal with 2 types of script ( python and groovy)\nBased on your advise, do you see what could be the best based on your experience in order to help me chose one or the other ?\nThanks for help\nregards","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":182,"Q_Id":61730467,"Users Score":0,"Answer":"I would follow up to Laurent, and say, the better solution is the solution that has the least amount of complexity while accomplishing everything you need to do. \nIn this case according to your own post, that is clearly just calling graph API directly from your groovy scripting in Jira.","Q_Score":0,"Tags":"groovy,azure-active-directory,jira,azure-sdk-python","A_Id":61735494,"CreationDate":"2020-05-11T13:07:00.000","Title":"What is the main Ad's and Con's using MS Graph API vs MS Azure SDK","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"Im trying to figure out how ansible executes the commands on the remote host, I get that it uses ssh\/winrm to connect to the remote host but from there it would have to assume the remote host has python\/powershell (depends on the os) and all the libraries their code need to run.\nso basically what im asking is :\n\ndoes ansible require the remote host to have python in the right version on it.\ndoes it require the remote host to have the libraries their code uses.\nif not does it transfer the modules when it connects and removes them afterwards.\nelse it may \"compile\" the modules and transfer them","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":38,"Q_Id":61731191,"Users Score":0,"Answer":"Ansible works by connecting to your nodes and pushing out small programs, called \"Ansible modules\" to them. These programs are written to be resource models of the desired state of the system. Ansible then executes these modules (over SSH by default), and removes them when finished.","Q_Score":0,"Tags":"python,ansible,infrastructure","A_Id":61731574,"CreationDate":"2020-05-11T13:43:00.000","Title":"how does ansible executes on a remote host?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"In my Az Function app, I have some ubuntu packages like Azure CLI and Kubectl that I need to install on the AZ Host whenever it starts a new container. I have already tried Start-up Commands and also going into the Bash. The former doesnt work and the latter tells me permission is denied and resource is locked.  Is there any way to install these packages on function start-up in Azure Functions?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":210,"Q_Id":61734028,"Users Score":0,"Answer":"If you try to install the package via bash, it is impossible and will not be dealt with at all. The reason is because when you use python to write functions and deploy them to linux os on azure, in fact it installs various packages according to requirements.txt, and finally merges these packages into a whole. When you run the function on azure, you are based on this whole package. Therefore, if it is incorrect to try to install the package after deployment, you should specify the package to be installed in requirements.txt before deployment and then deploy to azure.","Q_Score":0,"Tags":"python,azure,azure-functions,azure-web-app-service","A_Id":61745587,"CreationDate":"2020-05-11T16:00:00.000","Title":"Is there anyway to run and deploy ubuntu packages on Azure functions Startup?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm using sublime text 3 and I want to run ipynb files. I have installed helium. In the document, it says to execute a block I should execute Helium: Execute Block in the command palette. But can't seem to find that command.","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":798,"Q_Id":61766361,"Users Score":1,"Answer":"Step 1.) run %connect_info in a localhosted jupyter notebook and copy the json output\nStep 2.) In sublime text editor, press \"Ctrl+shift+P\" and type hermes: start kernel and copy paste this json you copied from step 1.\nYou should see a blank page popout.\nStep 3.) Open your py file you want to execute, and select the lines you want to execute using mouse and again press \"Ctrl+shift+P\" and type hermes: execute cell (you will see an option now), click on that and your output should run on the black page which popped out in step 2.\nNote : If your localhost jupyter notebook is running in a specific folder, make sure that the py file you want to run using helium\/hermes is under that jupyter notebook access, basically the py file has to be under the same folder you ran jupyter from.","Q_Score":1,"Tags":"ipython,sublimetext3,helium","A_Id":63818323,"CreationDate":"2020-05-13T04:18:00.000","Title":"Unable to run helium with sublime text","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to combine gcloud VMs and Google Colab using the local runtime connection.\ngcloud compute ssh [Instance] --zone [ZONE] -- -L 8080:localhost:8080 -N -T\nConnection is established but the runtime appears as \"busy\" on colab. I am pretty sure that nothing is running on the VM.\nAny ideas ?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":199,"Q_Id":61769565,"Users Score":0,"Answer":"You can mount GDrive and access files from both sides.","Q_Score":0,"Tags":"python,ssh,google-colaboratory,gcloud","A_Id":61834075,"CreationDate":"2020-05-13T08:17:00.000","Title":"How do I connect a Gcloud Virtual Machine to Colab using a local connection?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I tried crontab -e.\n@reboot python3 \/home\/hyebin\/project\/tensorrt_demos\/trt_ssd.py --model ssd_mobilenet_v2_face --usb --vid 1 --width 1280 --height 780\n1.Do I just have to add it to the bottom line of the crontab -e?\n2. Is it okay to have additions, such as '--model'?\n3. What should I do if we have such additions?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":169,"Q_Id":61774546,"Users Score":1,"Answer":"it's better to use absolute paths in crontab rather that just python3.\nexample:\n@reboot  \/path\/to\/command arg1 arg2\nit should work fine with arguments such as --model\nto find your absolute path to python3 you can run which python3 and use that","Q_Score":0,"Tags":"python,nvidia-jetson","A_Id":61774949,"CreationDate":"2020-05-13T12:22:00.000","Title":"How do I run Python scripts automatically on Jetson TX2?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"When I type pip install pygame or pip3 install pygame on terminal, it says \"check the logs for full command output\". I already upgraded pip and it still says that. Can you tell me what this means and how to fix it?","AnswerCount":2,"Available Count":2,"Score":0.1973753202,"is_accepted":false,"ViewCount":2261,"Q_Id":61776771,"Users Score":2,"Answer":"You can try running the pip command by adding the --verbose flag. This will print out the logs in the Terminal, which you then can inspect. These logs often help you indicate the cause of the error.\nFor example:\npip install --verbose pygame\nor\npip3 install --verbose pygame","Q_Score":4,"Tags":"python,python-3.x,pip","A_Id":69160098,"CreationDate":"2020-05-13T14:06:00.000","Title":"What do I do when the terminal says \"Check the logs for full command output\"?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"When I type pip install pygame or pip3 install pygame on terminal, it says \"check the logs for full command output\". I already upgraded pip and it still says that. Can you tell me what this means and how to fix it?","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":2261,"Q_Id":61776771,"Users Score":0,"Answer":"When you get this message, there will be a few lines above it which tell you where the log file is and some more details about what went wrong.","Q_Score":4,"Tags":"python,python-3.x,pip","A_Id":69160187,"CreationDate":"2020-05-13T14:06:00.000","Title":"What do I do when the terminal says \"Check the logs for full command output\"?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am new to Python and I am currently trying to install the Bloomberg python blpapi package.\nTo do so I first need to install the Bloomberg C++ SDK. In order to do so I have:\n\nDownloaded the Windows experimental package from [bloomberg.com\/professional\/support\/api-library][1]\nI also set up the environment variables accordingly\nExtracted the package to C:\\blp\\API\nI then opened command prompt (CMD.exe) and set BLPAPI_ROOT=C:\\blp\\API\nChanged directory to package folder: C:\\blp\\API\\blpapi_cpp_3.14.3.1\n\nThe problem arises when I now have to run the command to install the package: python setup.py install\nI get the error \"python can't open file 'setup.py': [Errno 2] No such file or directory\"\nI googled the error and found out that each package has to have a setup.py file in order to be installed\nWhat does one do in this case?","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":48,"Q_Id":61779744,"Users Score":1,"Answer":"You might have set up your BLPAPI_ROOT to the right path which is the folder containing C++API but you must run python setup.py install in the Python API folder.\nThese are 2 different steps.","Q_Score":0,"Tags":"python,bloomberg","A_Id":64361789,"CreationDate":"2020-05-13T16:21:00.000","Title":"setup.py file not included with package","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"We are trying to fetch event and calendar information for user through Graph API. User is present on Azure Active directory and has active o365 subscription. \/events or \/calendar APIs  are not working. Is it possible to do so through non work premium Microsoft accounts?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":66,"Q_Id":61790857,"Users Score":0,"Answer":"you mention its a personal premium account, then you say user is present in azure ad.. there are a few conflicting statements here, if you could clarify, \nthere are no such thing as a personal premium account. Microsoft 365 is either business premium, personal or family. there is no personal premium.. \nIf it is a personal office 365 account, then it does not have Azure ad. and you can only grab limited data for that user through graph, by using the \/me endpoint. i would highly doubt that you could access a personal account's calendar.\nif you are talking about a business premium account, then that comes with azure ad, and you should be able to interact with the users through graph as per documentation. but you would still need to grant more permissions for calendar for example to read someone elses calendar. \nIf it is a personal o365 account that you added to a different o365 business tenant, that user still does not belong to your tenant, because at its base its still a personal account with no real azure ad tenant. \nhopefully that clarifies a bit.","Q_Score":0,"Tags":"python,graph,microsoft-graph-api,azure-ad-graph-api","A_Id":61798846,"CreationDate":"2020-05-14T06:37:00.000","Title":"Is it possible to fetch user event data using Graph API for personal premium Microsoft accounts","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"If a chron schedule exists for a given Airflow DAG to launch every month on the 1st at 6am like this:\n0 6 * * 1\nAnd the start date is March 1st 2020, then in theory the DAG will only launch April 1st 2020 to cover the entire period as per the documentation. \n1) However, what if I wanted the DAG to launch on March 1st? Is there a way to set the DAG's start date to March 1st with an option to run as normal but to include the start date? \n2) If I manually launch the DAG on April 3rd, will the DAG still automatically launch as per the chron schedule on May 1st, or skip it, seeing as how an execution took place within the period that May is supposed to cover?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":214,"Q_Id":61803983,"Users Score":3,"Answer":"Option 1: Trigger the DAG manually on March 1. Option 2: Set the start date to February 1, then the first interval will end on March 1 and the DAG will be triggered on schedule. I am not aware of any option that will let you run the DAG on the start date as you described.\nManually triggering a run does not affect the run schedule, so the DAG will still run on May 1.\n\nBTW: The schedule \"0 6 * * 1\" that you mentioned means \"At 06:00 on Monday.\" \"At 06:00 on the first day of a month\" is \"0 6 1 * *\".","Q_Score":1,"Tags":"python,airflow","A_Id":61873042,"CreationDate":"2020-05-14T17:46:00.000","Title":"Manually starting DAG skips next scheduled run?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am using python winrm protocol to run a Powershell script in the windows server.When I run the script as standalone in the server, the script output is getting displayed fine whereas when i call the script from python, the output is empty. Suggestions please. \nPython : std_out, std_err, status_code = p.get_command_output(shell_id, command_id)\n         print(std_out.decode('utf-8'))\nPowershell : write-output - \"#START $output #END\"\nThe output returned from powershell is that of a Java Jar output.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":145,"Q_Id":61807376,"Users Score":0,"Answer":"Looks like there was errors being thrown in the jar output and hence the output was not capturing it. When std_err, status_code were decoded to utf-8(like i did with std_out print(std_out.decode('utf-8'))), i was able to see the results.","Q_Score":0,"Tags":"python,powershell,winrm","A_Id":61874264,"CreationDate":"2020-05-14T21:05:00.000","Title":"How to pass the output of a powershell script to a pythonscript","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have 10 microservices in django. I am running all microservices in different tab in terminal on localhost.So I want to run all microservices in single tab. I don't want to open multiple tab. Is there any way to do so?\nThanks in Advance","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":348,"Q_Id":61814630,"Users Score":0,"Answer":"I suggest to use docker for micro services.\nI have currently deployed my django application in production environment using docker I can manage them using docker-compose.\nAlternatively you can create shell script file for each micro service where you can define there own environment settings.","Q_Score":0,"Tags":"django,python-3.x,localhost,microservices","A_Id":61816975,"CreationDate":"2020-05-15T08:08:00.000","Title":"Run multiple microservices in single tab","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"i want to install openStack on ubuntu 16.04 when i enter the command **.\/stack.sh** i get the following error   \nERROR: Package 'keystone' requires a different Python: 3.5.2 not in '>=3.6'\npython version  is 2.7.12 , i also read the openstack.org documentaion, it said in Prerequisites that use to up version 2.7.  \nEach time I get error, I re-enter the following commands:\n**.\/unstack.sh**\n **.\/clean.sh**\n**.\/stack.sh**\nBut I get the same error again","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":264,"Q_Id":61824869,"Users Score":1,"Answer":"You can try to add \"USE_PYTHON3=True\" parameter to your local.conf, it should work","Q_Score":0,"Tags":"python,python-2.7,openstack,devstack,openstack-keystone","A_Id":62029933,"CreationDate":"2020-05-15T17:16:00.000","Title":"openStack - Package : keyStone error requires a different python version","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"In my ubuntu, not performing well when I am going to install pystan and fbprophet, using pip3 command. So, my system hangs badly.\nI am tried so many logics still got errors, kindly please guide me how i can rectify this issues ?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":165,"Q_Id":61842222,"Users Score":0,"Answer":"Did you try this? PyStan requires a C++ compiler to be available to Python during installation and runtime and can be done by this command - \n\napt-get install build-essential","Q_Score":1,"Tags":"python,python-3.x,pystan,facebook-prophet","A_Id":61842474,"CreationDate":"2020-05-16T19:11:00.000","Title":"trouble installing pystan and fbprophet","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Is it possible to run adb commands in silent mode or something like that? For instance, whenever I pull a file, it returns 1 file pulled, 0 skipped. 11.3 MB\/s (705431 bytes in 0.059s), which may be annoying if your script is doing it very often.\nI'm not sure if it matter, but I'm using VSCode.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":338,"Q_Id":61844430,"Users Score":1,"Answer":"Try this if your using Linux adb pull source dest > \/dev\/null. For windows am not sure it should be $null or something","Q_Score":0,"Tags":"python,adb","A_Id":61844616,"CreationDate":"2020-05-16T22:28:00.000","Title":"Running adb commands in silent mode (without output)","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I want to do a runtime with llvmlite, and I would like to transpiler c to llvm.\nI want to know if in a way in llvmlite itself or in some python lib, I can't find it on the internet, so I came to ask you. Thank you very much in advance","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":159,"Q_Id":61846090,"Users Score":2,"Answer":"If you want to transform C code to LLVM IR, no need to do it using llvmlite, which is a LLVM binding library. Just call clang -c -emit-llvm on a C source from your Python code.","Q_Score":1,"Tags":"python,llvm,llvmlite","A_Id":61848986,"CreationDate":"2020-05-17T02:07:00.000","Title":"how to transpiling c to llvm in llvmlite","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":1,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I made my project fine and when I run my server  through a normal shell it works but I am trying to run my project through git bash. All the commands seem to work fine but when I do python manage.py runserver it gets stuck on Watching for file changes with StatReloader. Apparently after that I go to localhost:8000\n\nbut that and my 127 port 8000 are not responding and show that theres nothing there, No errors or anything and like I said if I python manage.py runserver through shell it works","AnswerCount":4,"Available Count":4,"Score":0.1973753202,"is_accepted":false,"ViewCount":6488,"Q_Id":61863806,"Users Score":4,"Answer":"If you use django with Dockerfile, you won't miss that env var PYTHONUNBUFFERED set by 1.","Q_Score":10,"Tags":"python,django,git-bash","A_Id":67298558,"CreationDate":"2020-05-18T06:43:00.000","Title":"Stuck in Watching for file changes with StatReloader","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I made my project fine and when I run my server  through a normal shell it works but I am trying to run my project through git bash. All the commands seem to work fine but when I do python manage.py runserver it gets stuck on Watching for file changes with StatReloader. Apparently after that I go to localhost:8000\n\nbut that and my 127 port 8000 are not responding and show that theres nothing there, No errors or anything and like I said if I python manage.py runserver through shell it works","AnswerCount":4,"Available Count":4,"Score":0.0,"is_accepted":false,"ViewCount":6488,"Q_Id":61863806,"Users Score":0,"Answer":"Using Git Bash run:\n$ python manage.py runserver 127.0.0.1:8000\nIn my case, it showed the same behavior ('Stuck in watching...').\nHowever, after that I opened a browser and I typed:\n127.0.01:8000.  The Django webpage works properly.","Q_Score":10,"Tags":"python,django,git-bash","A_Id":70822439,"CreationDate":"2020-05-18T06:43:00.000","Title":"Stuck in Watching for file changes with StatReloader","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I made my project fine and when I run my server  through a normal shell it works but I am trying to run my project through git bash. All the commands seem to work fine but when I do python manage.py runserver it gets stuck on Watching for file changes with StatReloader. Apparently after that I go to localhost:8000\n\nbut that and my 127 port 8000 are not responding and show that theres nothing there, No errors or anything and like I said if I python manage.py runserver through shell it works","AnswerCount":4,"Available Count":4,"Score":-0.049958375,"is_accepted":false,"ViewCount":6488,"Q_Id":61863806,"Users Score":-1,"Answer":"Probably autoreload does not work well in your environment, if you don't need it - better turn it off by starting django with --noreload arg.","Q_Score":10,"Tags":"python,django,git-bash","A_Id":63439371,"CreationDate":"2020-05-18T06:43:00.000","Title":"Stuck in Watching for file changes with StatReloader","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I made my project fine and when I run my server  through a normal shell it works but I am trying to run my project through git bash. All the commands seem to work fine but when I do python manage.py runserver it gets stuck on Watching for file changes with StatReloader. Apparently after that I go to localhost:8000\n\nbut that and my 127 port 8000 are not responding and show that theres nothing there, No errors or anything and like I said if I python manage.py runserver through shell it works","AnswerCount":4,"Available Count":4,"Score":1.2,"is_accepted":true,"ViewCount":6488,"Q_Id":61863806,"Users Score":2,"Answer":"You may be missing the port binding, try to run python manage.py runserver 0.0.0.0:8000 to be sure that the app is running on localhost:8000","Q_Score":10,"Tags":"python,django,git-bash","A_Id":62662322,"CreationDate":"2020-05-18T06:43:00.000","Title":"Stuck in Watching for file changes with StatReloader","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am working on a maven project that has its source file in JAVA. I had to add some functionality in the project through some already written code. But these new files were written in PYTHON. Hence I decided to make a shell script that can run both the java and python files with desired args. But since my java source files are in the maven project, I am not able to write a shell script without exploiting the structure of the maven project.\nSo, how can I run the above files without ruining the structure of my maven project?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":155,"Q_Id":61873458,"Users Score":0,"Answer":"As Andersen mentioned that Maven can compile and execute .java files, it means it is only specific to java. For python files, you need setup.py to build python based project. You can not directly call a function written in Python from Java class. Now coming back to your requirements, I can think that you have to build separately java project using Maven with the command mvn clean install and you have to run setup.py if available in python project. Since you cannot call a python function from java class, you have to create an exe file in python using pyinstaller or using py2exe and you invoke the exe file from java. The above I mentioned in one of the approaches. Another approach is to rewrite the python code in java and build using maven. This will be the good approach based upon the requirement. Besides, if you are interested to build java project using Maven and you want to build python project, you can write a .bat file.","Q_Score":0,"Tags":"java,python,shell,maven","A_Id":61873953,"CreationDate":"2020-05-18T15:41:00.000","Title":"Running a maven project and a python file through shell script","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"When I try to open Python it gives me an error saying:\nIDLE's subprocess didn't make connection. See the 'startup failure' section of the IDLE doc online\nI am not sure how to get it to start. I am on the most recent version of windows, and on the most recent version of python.","AnswerCount":3,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":711,"Q_Id":61880099,"Users Score":0,"Answer":"Open cmd and type python to see if python was installed. If so fix you IDE. If not download and reinstall python.","Q_Score":0,"Tags":"python","A_Id":61880601,"CreationDate":"2020-05-18T22:30:00.000","Title":"Python not starting: IDLE's subprocess didn't make connection","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"When I try to open Python it gives me an error saying:\nIDLE's subprocess didn't make connection. See the 'startup failure' section of the IDLE doc online\nI am not sure how to get it to start. I am on the most recent version of windows, and on the most recent version of python.","AnswerCount":3,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":711,"Q_Id":61880099,"Users Score":0,"Answer":"I figured it out, thanks. All I needed to do was uninstall random.py.","Q_Score":0,"Tags":"python","A_Id":61880823,"CreationDate":"2020-05-18T22:30:00.000","Title":"Python not starting: IDLE's subprocess didn't make connection","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to deploy a simple user bot on Google App Engine Flexible Environment running python3.7, but I get the following error. Can anyone help me with suggestions of solving this?\n\"File \"\/env\/lib\/python3.7\/site-packages\/telethon\/client\/auth.py\", line 20, in  phone: typing.Callable[[], str] = lambda: input('Please enter your phone (or bot token): '), EOFError: EOF when reading a line\"\nThank you for your time","AnswerCount":3,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":780,"Q_Id":61884537,"Users Score":0,"Answer":"Telethon (obviously) requires you to login and make a normal user session on your account, which natively requires you to input your number when asked and enter the code received but since Google App engine doesn't allow input as @Sashidhar mentioned, depending on your userbot implementation, you can try using the userbot.session method for authentication, it can be generated locally and placed in the Google App Engine.","Q_Score":0,"Tags":"google-app-engine-python,telethon","A_Id":62506639,"CreationDate":"2020-05-19T06:25:00.000","Title":"Hosting a Telethon User BOT on google-app-engine","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have situation in centos where 3 different\/Independent caller will try to execute same python script with respective command line args. eg: python main.py arg1, python main.py arg2, python main.py arg3 at same time.\nMy question is - Is it possible in the first place or I need to copy that python script, 3 times with 3 different names to be called by each process. \nIf it is possible then how it should be done so that these 3 processes will not interfare and python script execution will be independent from each other.","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":18,"Q_Id":61900303,"Users Score":1,"Answer":"All the python processes will run entirely isolated from each other, even if executing the same source file.\nIf they interact with any external resource other than process memory (such as files on disk), then you may need to take measures to make sure the processes don't interfere (by making sure each instance uses a different filename, for example).","Q_Score":0,"Tags":"python-3.x,centos","A_Id":61900366,"CreationDate":"2020-05-19T20:35:00.000","Title":"Can I execute 1 python script by 3 different caller process at same time with respective arguments","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Do you know how to create package from my python application to be installable on Windows without internet connection? I want, for example, to create tar.gz file with my python script and all dependencies. Then install such package on windows machine with python3.7 already installed. I tried setuptools but i don't see possibility to include dependencies. Can you help me?","AnswerCount":1,"Available Count":1,"Score":-0.1973753202,"is_accepted":false,"ViewCount":37,"Q_Id":61907614,"Users Score":-1,"Answer":"Their are several Java tutorials on how to make installers that are offline. You have your python project and just use a preprogrammed Java installer to then put all of the 'goodies' inside of. Then you have an installer for windows. And its an executable.","Q_Score":0,"Tags":"python,python-3.x","A_Id":61907790,"CreationDate":"2020-05-20T07:41:00.000","Title":"Create package with dependencies","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I know it's a very general question but I am open for different options.\nLet me clarify what my codes do:  \n\nThe C++ code produces multiple .png files as output as follows  \n.\/Debug\/mycpp input1path input2path output parameter1 parameter2  \nThe python code takes those png files to do image processing and returns them as png as well  \nmypython.py inputpath outputpath\n\nWhat I want to do:\n* To create an \"executor code\" that runs and links those 2 codes\n* The only criterion is that 'the executor code' should work on Ubuntu  \nAny suggestions will be appreciated.  \nAdditional notes:\n* I don't want to call c++ in python, I just want to create a 3rd code (e.g. shell script) that calls c++ first then calls python after c++ has finished it's task.","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":134,"Q_Id":61908313,"Users Score":1,"Answer":"Python is perfect for such scripts, it has a complete support for such scripts.\nYou should look at subprocess and os modules for the complete command set for it.","Q_Score":0,"Tags":"python,c++,linux","A_Id":61908438,"CreationDate":"2020-05-20T08:18:00.000","Title":"Running a C++ code and a Python code consecutively","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":1,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"when I try to check python version in Centos7 by typing  command \n1) python --version\n-bash: \/usr\/local\/bin\/python3.6: No such file or directory\n                 OR\n2) which python \n\"alias python='\/usr\/local\/bin\/python3.6'. \nCould anyone explain me why it shows like this instead of showing python version?\nThanks.","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":40,"Q_Id":61911137,"Users Score":1,"Answer":"In order to sum up, for future people who will look in this question:\nwhen installing different versions of python on linux using package manager (in this case yum because you are using CentOS, but it might be apt or something else)  linux installs the side-by-side, meaning you have all of the versions installed together.  \nIf you want to use a specific version other than your linux distribution diffault one you need to call it explicitly (i.e. python3.6 or python3.8)\nMake sure you are looking for the wanted python version on the right path.  \nWhen you want to run some version of python after installing it I suggest you to just write python in the bash and just hit tab+tab and the bash will suggest all the installed versions in the $PATH.","Q_Score":2,"Tags":"python-3.x","A_Id":61996544,"CreationDate":"2020-05-20T10:46:00.000","Title":"how to verify whether latest python version installed properly","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have installed superset in python virtual env on GCP VM. I am running the superset using following command inside the virutal env.\ngunicorn -w 5 --timeout 120 -b 0.0.0.0:8088 \"superset.app:create_app()\"\nBut when i  terminate my SSH connection the server stops, How to run SupserSet forever irrespective of my SSH connection.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":532,"Q_Id":61928369,"Users Score":0,"Answer":"you can usually run commands as a daemon using:\nnohup <your command> &","Q_Score":1,"Tags":"python","A_Id":61928991,"CreationDate":"2020-05-21T06:13:00.000","Title":"Run the Server in the background","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I want write code fetch data from teradata using python. The code should work while running using spark on cluster as well as local. While running using spark I don't want to open connections on executors. So the plan is to run code on driver using teradatasql package. Since teradatasql packages so library I thought I don't have install teradata library on cluster. \nI packaged the dependencies i.e. teradatasql as egg file and passed it as --py-files. But while running on code teradatasql is not able to read library from egg file. \nOs error: teradatasql.so cannot open shared object file. Not a directory.\nI followed the below steps to package the egg file.\n1. pip install teradatasql --target.\/src # note all my code is in src folder. Doing this step will install teradatasql package in my src folder. it contains teradatasql.so library\n2. In setup.py packages=find_packages('src'), package_data={'teradatasql':['teradatasql.so']}\n3. python setup.py bdist_eggg","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":252,"Q_Id":61931878,"Users Score":0,"Answer":"The teradatasql driver uses a shared library to communicate with the Teradata Database.\nThe teradatasql driver will not work if you repackage just the Python file portion of the driver. The error will occur that you got.\nThe intended use of the teradatasql driver is that you install it into your Python environment with the command: pip install teradatasql\nWe will not be able to effectively support you if you take apart and repackage the teradatasql driver. That is not a supported use case.","Q_Score":0,"Tags":"python,apache-spark,teradata","A_Id":61960405,"CreationDate":"2020-05-21T09:58:00.000","Title":"Running Teradatasql driver for python code using spark","Data Science and Machine Learning":0,"Database and SQL":1,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"i'm using odoo 10, python version 2.7 and pycharm 2019.3.2\ni set script path to odoo-bin, python interpreter to python.exe (2.7), environnement variables to PYTHONUNBUFFERED=1, everything works fine.\nNOW, i wanna work with odoo 13 in the same time, i've python version 3.7 and pycharm 2019.3.2\ni set script path to odoo-bin (odoo 13), python interpreter to python3.exe, environnment variables to PYTHONUNBUFFERED=1,  here when i'm getting this error in the log when i run odoo:\nProcess finished with exit code -1073740940 (0xC0000374) \ni don't know why i'm having this? can anyone help me plz!","AnswerCount":1,"Available Count":1,"Score":0.6640367703,"is_accepted":false,"ViewCount":5028,"Q_Id":61935980,"Users Score":4,"Answer":"after many research i found the solution: it's not a problem of odoo or pycharm, it's a windows 10 problem!.\nGo to panel control > Region > Administrative, and on Languages for non-unicode programs, change regional configuration, check 'Use UTF-8 to language support worldwide' then restart the computer.","Q_Score":3,"Tags":"python,odoo","A_Id":61937729,"CreationDate":"2020-05-21T13:47:00.000","Title":"Process finished with exit code -1073740940 (0xC0000374)","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I am new using pipenv and I would like to know why every time I create a virtual environment, the environment saves me with my username and not with the name of my project folder.\nSteps:\n\ncd project-01\/\nproject-01> pipenv --three\nls .local\/share\/virtualenvs\/\nresult: username-nQve7NT7\n\nand it always sets me \/home\/username\/ as the path of my project. I'm using Xubuntu 18.04.4 with Python 3.6.9 and pipenv 2018.11.26\nThanks.","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":49,"Q_Id":61975870,"Users Score":0,"Answer":"I had this same problem and found that my issue was that there was a Pipfile and Pipfile.lock in my user directory.\nI must have mistakenly run pipenv shell there at some point, and while I may have removed the environment folder, the Pipfiles remained.\nI imagine pipenv must look up the file tree for a Pipfile and, if it finds one, assumes that is the project root. Removing the Pipfiles fixed the problem for me.","Q_Score":0,"Tags":"python,pipenv","A_Id":70562080,"CreationDate":"2020-05-23T17:20:00.000","Title":"problems creating virtual environments with pipenv","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I've searched a while and haven't found an answer to this particular issue. \nbrew info python returns python: stable 3.7.7 (bottled), HEAD\nHowever, python -V and python3 -V return Python 3.6.1 :: Anaconda 4.4.0 (x86_64)\nWhy is my Mac python version different than what I've installed with HB, and how can I fix it? Thank you!","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":85,"Q_Id":61980277,"Users Score":0,"Answer":"Erg.  Yes\u2014this is a challenge sometimes.  macOS ships with python as part of its system.  Catalina 10.15.4 ships with \/usr\/bin\/python3 of 3.7.3.  brew (at the moment) has installed 3.7.7 as its stable branch, but it also offers a python@3.8 which installs 3.8.2. That's significant because there are other brew packages (notably vim) which specity python@3.8 as a dependency.  Yuck.\nI'm not running anaconda at the moment, but I'll take your word that it's yet-another version.\nWhichever appears first in your path is going to prevail unless you're operating inside a context like a virtual environment. You can arrange your path to set your preferred python3 to run.  You can always check which python3 is running by using \"which python3\" and that will give you the full path of the running program.\nWord of caution: Each distinct python3 will maintain its own packages library. Once you have your paths sorted out, you should manage your packages with \"python3 -m pip \" to be sure you're managing the libraries for your intended version.\nAnd yes\u2014eventually, it'd probably be good for us to work in virtual environments or skip straight to Docker containers.","Q_Score":1,"Tags":"python,python-3.x,macos","A_Id":61981016,"CreationDate":"2020-05-24T00:37:00.000","Title":"Homebrew python version different than Mac python version?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I've searched a while and haven't found an answer to this particular issue. \nbrew info python returns python: stable 3.7.7 (bottled), HEAD\nHowever, python -V and python3 -V return Python 3.6.1 :: Anaconda 4.4.0 (x86_64)\nWhy is my Mac python version different than what I've installed with HB, and how can I fix it? Thank you!","AnswerCount":2,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":85,"Q_Id":61980277,"Users Score":0,"Answer":"One version of python was installed using the Anaconda distribution. The other by Homebrew. It's not surprising that they are different versions. You should run in virtual environments and then you won't need to worry about 2 versions.  Using the Anaconda distribution it is easy to set up a virtual environment to run that version.","Q_Score":1,"Tags":"python,python-3.x,macos","A_Id":61980639,"CreationDate":"2020-05-24T00:37:00.000","Title":"Homebrew python version different than Mac python version?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"The question says it all. If I have a cronjob that runs a python script, what will the value of __name__ be?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":60,"Q_Id":61989210,"Users Score":2,"Answer":"The same as if you run it directly from your shell. There is no difference between running it from your shell or from the crontab.","Q_Score":0,"Tags":"python,cron,cron-task","A_Id":61989247,"CreationDate":"2020-05-24T16:48:00.000","Title":"What will __name__ be when python script run from crontab?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I see the following text when I type python in my Windows 8.1 console (cmd.exe)\n\nPython 2.7.16 (v2.7.16:413a49145e, Mar  4 2019, 01:37:19) [MSC v.1500 64 bit (AM\n  D64)] on win32\n\nI want to run python3.6 version when I type python.\nWhat I tried\n1) Entered python3 and python3.6, but I didn't work\n2) downloaded python3 and added it to the PATH variable\n\nC:\\Users\\alex\\AppData\\Local\\Programs\\Python\\Python38-32\\Scripts\\;C:\\Users\\alex\\AppData\\Local\\Programs\\Python\\Python38-32\\;C:\\Users\\alex\\AppData\\Local\\Programs\\Python\\Python36\\Scripts\\;C:\\Users\\alex\\AppData\\Local\\Programs\\Python\\Python36\\;C:\\Program Files\\Java\\jdk1.8.0_91\\bin; c:\\Go\\bin; ;%PyCharm%; C:\\Users\\alex\\Desktop\\Education\\5\\dev\\chrome;;C:\\Program Files\\gretl;C:\\chromedriver;C:\\chromium-automation;C:\\Users\\alex\\AppData\\Roaming\\Microsoft\\Windows\\Start Menu\\Programs\\Python 3.6;","AnswerCount":2,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":212,"Q_Id":61991665,"Users Score":1,"Answer":"You can use the python launcher with the py -3 or py -3.6 command to explicitly invoke python3.\nThe path you posted is not your complete path. It is just the user path. The system path takes precedence over it and has python2 in it.\nYou can uninstall python2 to fix this. Or if you want to keep it, uninstall and reinstall python 3.6 remembering to choose the Add Python to PATH checkbox in the installer.","Q_Score":0,"Tags":"python,path,windows-8.1","A_Id":64344813,"CreationDate":"2020-05-24T19:54:00.000","Title":"How to run python3 from cmd.exe","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I see the following text when I type python in my Windows 8.1 console (cmd.exe)\n\nPython 2.7.16 (v2.7.16:413a49145e, Mar  4 2019, 01:37:19) [MSC v.1500 64 bit (AM\n  D64)] on win32\n\nI want to run python3.6 version when I type python.\nWhat I tried\n1) Entered python3 and python3.6, but I didn't work\n2) downloaded python3 and added it to the PATH variable\n\nC:\\Users\\alex\\AppData\\Local\\Programs\\Python\\Python38-32\\Scripts\\;C:\\Users\\alex\\AppData\\Local\\Programs\\Python\\Python38-32\\;C:\\Users\\alex\\AppData\\Local\\Programs\\Python\\Python36\\Scripts\\;C:\\Users\\alex\\AppData\\Local\\Programs\\Python\\Python36\\;C:\\Program Files\\Java\\jdk1.8.0_91\\bin; c:\\Go\\bin; ;%PyCharm%; C:\\Users\\alex\\Desktop\\Education\\5\\dev\\chrome;;C:\\Program Files\\gretl;C:\\chromedriver;C:\\chromium-automation;C:\\Users\\alex\\AppData\\Roaming\\Microsoft\\Windows\\Start Menu\\Programs\\Python 3.6;","AnswerCount":2,"Available Count":2,"Score":0.0996679946,"is_accepted":false,"ViewCount":212,"Q_Id":61991665,"Users Score":1,"Answer":"You need to remove python 2 installation directory from PATH before adding python 3 directory to PATH.","Q_Score":0,"Tags":"python,path,windows-8.1","A_Id":61991724,"CreationDate":"2020-05-24T19:54:00.000","Title":"How to run python3 from cmd.exe","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to build an extension in C for python 3 and I am using Windows. This might be a duplicate question but all the answers for the other question were for linux and I can run sudo on windows.\nHow do I fix this problem ?","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":800,"Q_Id":62003710,"Users Score":0,"Answer":"If the problem is just the sudo-thing, you can have an admin-Terminal easily.\nOpen your start menu, search for PowerShell, right click -> run as admin\nWith Powershell you can use most important UNIX-commands.\nIf your IDE or Text Editor does not find a header file like  the reason most likely is that this cpp-Header is either not installed or the Path to  is not defined. Look for sth like \"include-path\" in your IDE\u00b4s Settings.","Q_Score":2,"Tags":"python,c,windows,header","A_Id":62003915,"CreationDate":"2020-05-25T13:45:00.000","Title":"#include  no such file or directory for windows 10 fix","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to build an extension in C for python 3 and I am using Windows. This might be a duplicate question but all the answers for the other question were for linux and I can run sudo on windows.\nHow do I fix this problem ?","AnswerCount":2,"Available Count":2,"Score":0.0996679946,"is_accepted":false,"ViewCount":800,"Q_Id":62003710,"Users Score":1,"Answer":"Nevermind, I found the answer.\nYou must first search in your python directory for the 'include' folder, for example: \"C:\\Users\\David\\AppData\\Local\\Programs\\Python\\Python38-32\\include\", this is where mine is located and then search for Python.h and like that, you have the header.","Q_Score":2,"Tags":"python,c,windows,header","A_Id":62004410,"CreationDate":"2020-05-25T13:45:00.000","Title":"#include  no such file or directory for windows 10 fix","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"When multiple containers are allocated on one node, theoretically, since these containers are residing on the same machine, it seems like I could make them share disk memory?\nMore specifically, can I write some data on the disk of the machine that the containers are residing, and have each container grab that piece of data, without having to write multiple copies of the same data for each container?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":75,"Q_Id":62008760,"Users Score":0,"Answer":"I will answer my own question. It seems you can do this by writing the file on a directory that is one level above that of the specific container you are in. I.e.\n\/mnt\/yarn\/usercache\/hadoop\/appcache\/application_1590430074619_0007 for example, in which case you would be writing to a directory that is associated with the particular application you are running.","Q_Score":1,"Tags":"python,apache-spark,containers,hadoop-yarn,dask","A_Id":62009683,"CreationDate":"2020-05-25T18:46:00.000","Title":"Can multiple yarn containers inside same node share disk memory?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"So I installed Anaconda on my computer, and use Jupiter notebook to write a script.\nI have some .py files I want to run from Windows or Anaconda Terminal, just out of curiosity.\nHere are the error message I got -\nC:\\Users\\xxx\\Documents>python ex1.py\n'python' is not recognized as an internal or external command,\noperable program or batch file.\nIs there a way that I can run python on Windows without messing up the path?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":2984,"Q_Id":62014097,"Users Score":0,"Answer":"I guess you are using Command prompt to parse python files.\n\nOpen Anaconda Prompt, \nnavigate to the folder containing your python files cd c:\\path\\to\\python\\folder \nexecute using python ex1.py  where ex1.py is your filename \n\nin the anaconda terminal","Q_Score":0,"Tags":"python","A_Id":62014659,"CreationDate":"2020-05-26T03:19:00.000","Title":"How to run .py files on Windows\/Anaconda terminal?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a path variable in the system variables but how do i add a path variable in the user variables section since i don't have any at the moment.\nIf there isn't a path variable  in the user variables will it affect in any way?\nHow much will values of the path variables differ from the one in environment variables to the one in user variables if there is only one user present?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":58,"Q_Id":62015008,"Users Score":0,"Answer":"to add a new variable in users variable\n\nclick one new button below the user variables.\n\n2.Then a pop window will appear asking you to type new variable name and its value, click ok after entering name and value.\nThats how you can add a new variable in user variables.\nYou should have a path variable in user variables also because ,for example while installing python you have a choice to add python path to variables here the path will be added in user variable 'path'.","Q_Score":0,"Tags":"python","A_Id":62015154,"CreationDate":"2020-05-26T05:06:00.000","Title":"How do i add a PATH variable in the user variables of the environment variables?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I used to work in IDLE. There, if I reran a program it automatically kills the previous instances of the program. \nBut recently I shifted to Sublime. If I rerun the same program here, all the previous instances do not die and keep on running. \nCan any one provide a method so that when I rebuild a program the previous instances automatically die.","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":130,"Q_Id":62027872,"Users Score":1,"Answer":"If a build is still running, simply select Tools \u2192 Cancel Build and it will be killed. You can use CtrlBreak as a keyboard shortcut.","Q_Score":0,"Tags":"python-3.x,sublimetext3,python-idle","A_Id":62028118,"CreationDate":"2020-05-26T17:21:00.000","Title":"How to kill previous Python process when rebuilding a program in Sublime","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm new to this, so I apologize if my question is uneducated:\nI have a USB device for which I know the ProductID and VendorID.  From what I understand, it should be a HID device which sends a serial stream to my computer.  I was to write a script in python in order to read that serial stream, but I am getting nowhere.  Is there a way for Python's serial library to find a device from a PID and VID?","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":11297,"Q_Id":62031686,"Users Score":0,"Answer":"You can also just do an 'ls \/dev\/tty*.*' and find the USB device rather than go through to voluminous amount of garbage dumped by 'ioreg'.","Q_Score":1,"Tags":"python,pyserial,libusb,usbserial","A_Id":72361824,"CreationDate":"2020-05-26T21:25:00.000","Title":"Reading a serial signal from a USB port with Python","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to run Command Prompt commands using Python, but running my command seems to do nothing. The full command I pass to os.system is:\n'cmd \/c \"apt.bat\"'\nThis should run apt.bat, opening another program in the process. However, nothing happens. When I pass that same command to the Command Prompt manually, it runs correctly. So to try to hone in on the problem, I have tried running:\nos.system('cmd')\nbut nothing happens. As far as I know, this should open the Command Prompt, but I could be wrong about that. To ensure that I have the correct syntax and that os.system isn't broken or something, I have also tried running:\nos.system('notepad')\nwhich opens notepad without issue. Is there something different about 'cmd' that would cause it to simply not open? Is there some syntax I am missing? Maybe permissions?\nFor reference, I am on Windows 10. Python 3.7, using Spyder 4.","AnswerCount":2,"Available Count":1,"Score":-0.0996679946,"is_accepted":false,"ViewCount":2188,"Q_Id":62045916,"Users Score":-1,"Answer":"Your problem is that cmd is not a command. You should be using os.system('start cmd') or subprocess.run('start', shell = True) using the subprocess module.","Q_Score":0,"Tags":"python,command-prompt,os.system","A_Id":62046148,"CreationDate":"2020-05-27T14:44:00.000","Title":"Why does running \"os.system('cmd')\" do nothing in Python?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"While my Jupyter Notebook is running, the terminal shows that it is saving files periodically. How to run \"pip install\" using command lines in the terminal while the Jupyter Notebook is running? I believe I need to find a way to get back to the \"~ username $:,\" from which I can type commands. I tried 'cd\/' but it didn't seem to work. \nSo far I've been closing out of Anaconda, finishing \"pip install\", and getting back into Anaconda.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":101,"Q_Id":62054568,"Users Score":1,"Answer":"It sounds like you are using a unix-type system. In that case you can \n\nIn the jupyter notebook do !pip install <whatever package it is>\nIn the terminal window, type ^Z and then bg, then type your pip install command.\nOpen another terminal window, and do your pip install.","Q_Score":1,"Tags":"python,command-line,terminal,pip,jupyter-notebook","A_Id":62055055,"CreationDate":"2020-05-27T23:34:00.000","Title":"Using Terminal Command while Running Anaconda on Macbook","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I know that there was py2exe in which once it is run the executable can be run on any windows platform without python Interpreter. But now it being discontinued what are my alternatives for a all windows platform executable with a python interpreter? \nI tried pyInstaller in Windows 10 x64 but when I opened it in Windows 7 x64, it should a lot of errors. Is downgrading my python to 3.3 and running py2exe a good idea? Even if I did will py2exe support win 7, 8 and 10 with both x64 and x32 bit ? \nI know this was answered before here but there are people giving different opinions and most of the questions were a bit old, where everyone is recommending py2exe for windows which was answered before it was discontinued.\n(A one directory converter is recommended for me than a single exe file)\nThanks","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":80,"Q_Id":62056558,"Users Score":0,"Answer":"Have you tried using cx_Freeze 5.0?\nIt was recommended by a couple of users around Stack overflow and supposedly the project supports python 3.5 and higher. Unfortunately, I myself cannot assure you that it will work, as I haven't tried using it myself. \nIt really depends on how complex your code is and how much py2exe unsupported elements it contains.\nIf it isn't an unsurmountable or very time consuming task, maybe you could adjust the code to be convertable with py2exe, because that way the converter often works just fine. I cannot guarantee you that it will work for sure, but converting simpler code worked for me every time.\nI hope this helps. Have a great time!","Q_Score":0,"Tags":"python,pyinstaller,py2exe,cx-freeze","A_Id":62058320,"CreationDate":"2020-05-28T03:31:00.000","Title":"Executable on a windows platform with python interpreter","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a python script set to go off every minute in my crontab file:\n*\/1 * * * * ~\/ticker.py\nI've set permissions of ticker.py with chmod +x ticker.py to make the file executable.\nI am still getting \/bin\/sh: \/home\/ec2-user\/ticker.py: Permission denied in my \/var\/spool\/mail\/ec2-user mail file.\nI'm using an Amazon Linux EC2 instance. I appreciate any help with this. Thank you","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":424,"Q_Id":62071214,"Users Score":0,"Answer":"Found out the fix. Super simple but unsure why the #!\/usr\/bin\/env shebang didn't fix it in the first place.\nI replaced *\/1 * * * * ~\/ticker.py with *\/1 * * * * python ~\/ticker.py.\nThanks for the input.","Q_Score":0,"Tags":"python,unix,cron","A_Id":62075429,"CreationDate":"2020-05-28T17:47:00.000","Title":"Getting crontab \"permission denied\" on Python script even though it has executable permissions","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"On Linux Ubuntu with python 3.6.9\nWhen i try to download pip, it says i already have it. So when i try to pip install ... it gives me error \"bash: pip: command not found\".\nWhen i type \"which pip\" in the terminal it gives me nothing and creates a new line.\n(While also it doesn't work in the normal terminal) I should also say I'm trying to do this in a virualenv. It gives the same errors when  trying to install pip (I already have it) and when trying to use pip (\"bash: pip: command not found\")\necho $PATH output: \/usr\/local\/sbin:\/usr\/local\/bin:\/usr\/sbin:\/usr\/bin:\/sbin:\/bin:\/usr\/games:\/usr\/local\/games:\/snap\/bin\nsorry if this doesn't make sense, kinda a noob","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":2276,"Q_Id":62071515,"Users Score":1,"Answer":"Try the following:\n\npython -m pip install ....\npython3 -m pip install ....\npy3 -m pip install ....\n\nAs @S3DEV commented, there could be a problem with your path variables, so trying python before pip could solve. Those other variations (python3 and py) can also work.","Q_Score":2,"Tags":"python,bash,pip","A_Id":62071716,"CreationDate":"2020-05-28T18:03:00.000","Title":"\"bash: pip: command not found\" when using \"pip install ...\"","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"We have one terraform instance and script which could create infra in azure. We would like to use same scripts to create\/update\/destroy isolated infra for each one of our customers on azure . We have achieved this by assigning one workspace for each client,different var files and using backend remote state files on azure.\nOur intend is to create a wrapper python program that could create multiple threads and trigger terraform apply in parallel for all workspaces. This seems to be not working as terraform runs for one workspace at a time. \nAny suggestions\/advice on how we can achieve parallel execution of terraform apply for different workspaces?","AnswerCount":1,"Available Count":1,"Score":0.537049567,"is_accepted":false,"ViewCount":2124,"Q_Id":62073438,"Users Score":3,"Answer":"It's safe to run multiple Terraform processes concurrently as long as:\n\nThey all have totally distinct backend configurations, both in terms of state storage and in terms of lock configuration. (If they have overlapping lock configuration then they'll mutex each other, effectively serializing the operations in spite of you running multiple copies.)\nThey work with an entirely disjoint set of remote objects, including those represented by both managed resources (resource blocks) and data resources (data blocks).\n\nMost remote APIs do not support any sort of transaction or mutex concept directly themselves, so Terraform cannot generally offer fine-grained mutual exclusion for individual objects. However, multiple runs that work with entirely separate remote objects will not interact with one another.\nRemoving a workspace (using terraform workspace delete) concurrently with an operation against that workspace will cause undefined behavior, because it is likely to delete the very objects Terraform is using to track the operation.\nThere is no built-in Terraform command for running multiple operations concurrently, so to do so will require custom automation that wraps Terraform.","Q_Score":5,"Tags":"python,azure,terraform,terraform0.12+","A_Id":62076451,"CreationDate":"2020-05-28T19:55:00.000","Title":"Can terraform run \"apply\" for multiple infrastructure\/workspace in parallel?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am wondering how can you get device connection string from IotHub using python in azure? any ideas? the device object produced by IoTHubRegisterManager.Create_device_with_sas(...) doesn't seem to contain the property connection string.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":342,"Q_Id":62074126,"Users Score":0,"Answer":"You can get a device connection string from the device registry. However, it is not recommended that you do that on a device. The reason being is that you will need the IoT hub connection string to authenticate with your hub so that you can read the device registry. If your device is doing that and it is compromised then the perpetrator now has your IoT hub connection string and could cause all kinds of mayhem. You should specifically provide each device instance with its connection string. \nAlternatively, you could research the Azure DPS service which will provide you with device authentication details in a secure manner.","Q_Score":0,"Tags":"python-3.x,azure,azure-iot-hub","A_Id":62141138,"CreationDate":"2020-05-28T20:40:00.000","Title":"How do you request device connection string in azure using python and iotHub library?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am more experienced in Java and Maven and a real beginner in Python, so I don't really have an idea about what possible to do and what not.\nIn Java, using Maven we can manage dependencies versions in a file (a pom parent \/ the aggregator module), then re-declare in pom.xml of the sub-modules the necessary dependencies while omitting their version being managed by the pom parent. This way, we can distribute the sub-modules physically separately (Ex: every module in a machine) and every module would package only its required dependencies, the libraries that are defined in its own pom file.\nNow back to Python, currently I use a setup.py file which, to my understanding, should be in the root module. But then it packages the whole modules as one library.\nIs there a way to manage better the modules and their dependencies and be able to deploy every (chosen) module separately as an independent package with its own needed libraires? I want to be able to choose the modules to package separately, I don't want that every folder containing __init__.py to be packaged seprately.\nCurrently I use Pipenv to manage my dependencies, but I am ready to drop it if it doesn't satisfy the design I have explained above.\nThank you","AnswerCount":4,"Available Count":1,"Score":0.049958375,"is_accepted":false,"ViewCount":633,"Q_Id":62081927,"Users Score":1,"Answer":"There is nothing that does exactly what you want (as far as I know, at least). In python the way we manage dependencies of a project or a library is using requirements.txt and virtual environments. Both of which manages the dependencies of the project as a whole. \nTo separate the individual modules out of the project you'd treat them as separate projects and do what every project would need. Make the requirements.txt or if you need to install it using setup.py put them inside that.\nSo, for every 'sub-library' you want to 'separate' make a different requirements.txt or setup.py. \nThere's this library called pipreqs (and possibly others) which scans a folder and generates the requirements file automatically. I'd always recommend hand-crafting the requirements file right after you install any library.","Q_Score":4,"Tags":"java,python,maven,packaging,pipenv","A_Id":62465155,"CreationDate":"2020-05-29T08:39:00.000","Title":"How to do in order to package python modules separately when organized in the same project?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":1},{"Question":"I had similar problems with pip that was fixed with \"python3 -m\" but now after install Django I want to make a new project.\nWhen I try to run \"django-admin startproject ...\" I get \"bash: django-admin: command not found\".\nI don't know if I should mention it but, this is in a virtualenv.\npython3 -m pip freeze: Django==3.0.6\necho $PATH: \/home\/alatimer\/Environments\/DjangoTutoria_env\/bin:\/usr\/local\/sbin:\/usr\/local\/bin:\/usr\/sbin:\/usr\/bin:\/sbin:\/bin:\/usr\/games:\/usr\/local\/games:\/snap\/bin","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":411,"Q_Id":62087513,"Users Score":0,"Answer":"My problem was i was using python version 2.7 in the venv instead of version 3.6.9.\nI assume the older python couldn't recognize the commands (this even includes pip commands).","Q_Score":0,"Tags":"python,django,bash","A_Id":62093778,"CreationDate":"2020-05-29T13:50:00.000","Title":"\"bash: django-admin: command not found\" after running django-admin","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I had similar problems with pip that was fixed with \"python3 -m\" but now after install Django I want to make a new project.\nWhen I try to run \"django-admin startproject ...\" I get \"bash: django-admin: command not found\".\nI don't know if I should mention it but, this is in a virtualenv.\npython3 -m pip freeze: Django==3.0.6\necho $PATH: \/home\/alatimer\/Environments\/DjangoTutoria_env\/bin:\/usr\/local\/sbin:\/usr\/local\/bin:\/usr\/sbin:\/usr\/bin:\/sbin:\/bin:\/usr\/games:\/usr\/local\/games:\/snap\/bin","AnswerCount":2,"Available Count":2,"Score":0.0996679946,"is_accepted":false,"ViewCount":411,"Q_Id":62087513,"Users Score":1,"Answer":"Your problem is that your shell doesn't know where that program is, and the places it searches doesn't have it. \nNotably, the shell would look for a program specifically if the name were qualified some way, where you name a location at the start. So, you could use \"\/long\/path\/to\/django-admin\" or \".\/django-admin\" (if it's in the \".\" current directory).\nAlways qualify names that aren't standard programs. It isn't safe to mutate PATH to include a path relative to your current directory .. Instead, name your personal programs with location when you run them, .\/program .","Q_Score":0,"Tags":"python,django,bash","A_Id":62094051,"CreationDate":"2020-05-29T13:50:00.000","Title":"\"bash: django-admin: command not found\" after running django-admin","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I am facing an issue with pyspark while running this in local mode. And the tricky thing is when I open cmd and run pyspark it creates a session and then if I open the localhost:4040 I can see the UI. But, if I run some program from pycharm I am not able to access the UI (localhost:4040) also the URL is not generated. \nAnd in other case when I have the pyspark shell open in parallel with pycharm program and if I run the same program in pycharm I will get a warning saying cannot bind port 4040 so attempting 4041. which is a bit understandable as shell has occupied port 4040 so it is attempting 4041. So, ideally 4041 should be allocated but that is not the case. As the documentation says it attempts 16 times, to get the next free port number available, I have not been allocated with any. So, then if I see the services running currently on my PC, I could see none of them are using those ports.\nPlease help me with this.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":273,"Q_Id":62088457,"Users Score":0,"Answer":"The warning \"port 4040 is unaviable, attempting 4041\" and forawrd..., is occures probably, because you open a a lot of SparkContext without close them.(SparkContext#close).\nYou can change the port if you want by the parameter spark.ui.port in configuration.\nFor your first issue, can you provide logs please of the running spark app? maybe you are running a fast program that close the web ui fast enough before you enter?","Q_Score":0,"Tags":"python,scala,apache-spark,pyspark","A_Id":62088572,"CreationDate":"2020-05-29T14:38:00.000","Title":"pyspark bind issue cannot generate the SPARK UI","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I bought a MAC and I use this system for the first time, I also recently started using python.\nI have a python project with a requirement.txt file which I opened with PyCharm which also contains a dependency on uvicorn. I installed all the dependencies, but when I try to run the command \"uvicorn main: app\" I get the error \"command not found: uvicorn\".\nI tried to look for guides on my problem and I read that it could concern the PATH variable and following what written in these guides I tried to add the PATH to python from my home directory. Now the content of my python PATH is the following:\n\n\/Library\/Python\/3.7\/bin:\/usr\/local\/bin:\/usr\/bin:\/bin:\/usr\/sbin:\/sbin\n\nI also read that I should have added the following line to my ~\/.profile file and that because my MAC is a new one I could not have it, so I created this file and write the line written below:\n\nexport PATH=\/usr\/local\/bin:\/usr\/local\/sbin:$PATH\n\nnothing has changed since my attempts so I am asking what I should do. I've also seen that pip3 installed my modules of the requirements.txt file on the following directory:\n\n\/usr\/local\/lib\/python3.7\/site-packages\/\n\nThank you in advance for your help","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":3541,"Q_Id":62118964,"Users Score":0,"Answer":"I resolved setting a virtual environment in the project directory and installed the dependencies in it.","Q_Score":1,"Tags":"python,python-3.x,macos,path,uvicorn","A_Id":62250361,"CreationDate":"2020-05-31T16:08:00.000","Title":"macOS - command not found: uvicorn","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'd like to write a bash script that will be executed on new users' linux machines. The script should make sure the machine is ready to compile and run several fortran and python scripts. My intent was to check for GCC and subsequently check for gfortran in GCC and then use homebrew to install the gfortran formula if not present. Similarly with python, I would use pip to install python3 if python isn't up to date. \nI would like some advice before I begin. What are some best practices for checking for programs and installing them through a behind the scenes bash script? What are things to be careful for? I realize this question is vague but literally any advice is greatly appreciated.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":101,"Q_Id":62145515,"Users Score":0,"Answer":"A possible different approach to consider.\nIf the packages that you want are available for installation via the standard package manager for the Linux distribution that you are using, you could build a metapackage which, when installed, will force the installation of all of the components.  (A metapackage is one which does not directly contain any software itself but which lists a number of dependencies that the package manager will need to satisfy when installing it.)\nIf you also set up a repository on an http server containing your metapackage, and configure the package manager on the clients to point to it, then if you later decide to update the list of packages contained in your standard software suite across all the client machines, all you need to do is to publish a new version of your metapackage to the repository, and have the client machines rerun their operating system's software updater.  For the individual software components listed in the metapackage, the software update will pick up any updates to these in the ordinary way, provided that the dependency information in the metapackage does not specify an exact version (you could make the metapackage depend on >= some version number).\nThis is from experience where this approach has worked well in setting up and maintaining a common software platform across a large number of machines (including nodes of a compute cluster) -- although in cases where the required software components are not available in standard package repositories, it is then necessary to build a package for it locally and publish that to your repository; this can then be added as a requirement in your metapackage.\nThe above is in general terms, but taking the specific example on which this experience is based, if the client machines are running CentOS, then you would create a meta-RPM with dependencies on packages in standard repositories (e.g. base and EPEL) plus any other RPMs that you need to build locally, publish it to the repository on the http server and use createrepo to construct the necessary repository metadata, and create a config file in \/etc\/yum.repo.d on the clients to point to your repository and run yum install <your_meta_package>.  Any subsequent yum update on the clients will pick up any changes that you push to your repository.  The http server itself is simply serving static content, so does not need special configuration.\nFor Ubuntu etc, you could do similarly but with deb packages and APT.\nOne thing worth mentioning is that the above is aimed at a rather homogeneous environment, where the same operating system is in use on all the client machines.  If you want to cater for a more heterogeneous environment, then an alternative approach would be to use conda.  You could similarly maintain a conda channel containing a metapackage.","Q_Score":0,"Tags":"python,linux,bash,installation,homebrew","A_Id":62146458,"CreationDate":"2020-06-02T05:35:00.000","Title":"Automating the install of GFortran and Python3","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I want upload an asset to Earth Engine with Python and I don't want use Google Cloud Storage.\nIs there a way to upload a particular file (from my computer) directly to the Google Earth Engine using the command line (or using a Python script)?","AnswerCount":2,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":276,"Q_Id":62147243,"Users Score":-1,"Answer":"i use geemap module and bypass uploading file on googleEarthEngine","Q_Score":0,"Tags":"python,command-line,google-earth-engine","A_Id":62227503,"CreationDate":"2020-06-02T07:49:00.000","Title":"Upload asset in Google Earth Engine with Python?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I want upload an asset to Earth Engine with Python and I don't want use Google Cloud Storage.\nIs there a way to upload a particular file (from my computer) directly to the Google Earth Engine using the command line (or using a Python script)?","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":276,"Q_Id":62147243,"Users Score":0,"Answer":"No. You can only upload from Google Cloud Storage via python. The only way to upload directly from your computer is via the playground.","Q_Score":0,"Tags":"python,command-line,google-earth-engine","A_Id":62155953,"CreationDate":"2020-06-02T07:49:00.000","Title":"Upload asset in Google Earth Engine with Python?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"The command 'jupyter lab' usually works fine in cmd. But today it isn't. I uninstall and reinstalled all jupyter components but no gain. Jupyter notebook seems to be working though.\n\nC:\\Users\\Sarth.choudhary>jupyter lab \n  Cannot open D:\\Programs\\Miniconda3\\Scripts\\jupyter-lab-script.py\n\nI looked into the miniconda directory, jupyter-lab-script.py is indeed missing. I don't have this file anywhere in the miniconda directory.\nAny help much appreciated.","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":1902,"Q_Id":62150298,"Users Score":0,"Answer":"I created another environment and installed jupyter lab in it. Ensured everything worked fine. Copied the missing file and pasted it in the base env folder. After making sure that I can launch Jupiter lab from base environment I removed the new environment.\nI think antivirus must have deleted that file so I created an exception in antivirus.","Q_Score":4,"Tags":"python-3.x,jupyter,jupyter-lab,miniconda","A_Id":62153353,"CreationDate":"2020-06-02T10:48:00.000","Title":"Unable to launch Jupyter lab from cmd in windows 7","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to create a series ZigBee networks. Each network will be in close proximity to another, as such when all devices are turned on I need them to repeatedly look for their specified network and always join it. \nTo configure the network I have a coordinator device turned on and it will find up to 32 other devices. Once found I want the coordinator to set the remote devices Names (\"NI\") and PANID (\"ID\"). After using xbee.discover() I have a list of devices in my network. However I can not figure out how I can set the remote devices settings using MicroPython.\nCan you send AT Commands over MicroPython?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":113,"Q_Id":62155423,"Users Score":0,"Answer":"Remote AT commands aren't currently supported via the MicroPython interface.  One would typically set ATNI and the PAN ID via the local serial interface (or BLE) during commissioning of the network.  But I can imagine scenarios where you'd want to interface with the I\/O pins of a remote device.\nYou'll need to put in a feature request to Digi International to include it in an upcoming release.","Q_Score":0,"Tags":"xbee,micropython","A_Id":62160573,"CreationDate":"2020-06-02T15:24:00.000","Title":"Send Remote AT Command to Xbee Device in MicroPython","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"So as we know, Python doesn't have real threading because of the GIL (unless you go the Cython route and detach) but i can't seem to find info or documentation on a usecase.\nIf from my python script i run a Popen with the commands [dotnet test .....] and that code supports the native C# threads and processes and all of that, will my Python subprocess execute as native C# and handle as many threads as the script needs to or is it locked behind 1 process and 1 thread?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":30,"Q_Id":62157808,"Users Score":1,"Answer":"Any sub-process you launch with Popen will behave as it normally does. Python's threading model won't be inherited by a non-Python process when you launch it from within a Python process.","Q_Score":0,"Tags":"python,subprocess,popen","A_Id":62158002,"CreationDate":"2020-06-02T17:27:00.000","Title":"Is a python subprocess allowed to use as many real threads as it can?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have an API deployed on Cloud Run where each request results in a read + write to Cloud Datastore. A non-trivial amount of the requests are first timers (read from Datastore will return null), so adding caching in front of it may not be too helpful.\nOver the past month, the average wall time around calling Datastore and having the data (data = client.get(key, eventual=True)) is 48ms. The payloads are small (a list of dicts, with 10 elements on average, and each dict has two floats).\nI'm not sure if I should say that latency is high, but my API has a budget of 100ms to do all that it needs to do and return. If just the data fetching takes ~50% of that time, I'm looking for ways to optimize things.\nQuestions:\n\nIn general, how does 50ms sound for fairly small payloads, fetched by key, from within GCP?\nWhat should I expect (in terms of latency) from Memorystore within GCP?","AnswerCount":1,"Available Count":1,"Score":0.6640367703,"is_accepted":false,"ViewCount":747,"Q_Id":62160701,"Users Score":4,"Answer":"Assuming you are using Cloud Run and Datastore on the same location, I would say that 50ms is around the expected latency you'd have for reading on datastore, the size of the payload does not matter as much for reads (10 - 1000 document reads do not make a big difference on time of processing\/propagating).\nSince you have such a small window for your API to operate, this could indeed be a problem if some unnexpected delays occur.\nI have never used Memorystore so I can't say what you could expect of actual latency but it might be a better option given that every ms to your app counts.","Q_Score":2,"Tags":"python,optimization,google-cloud-datastore,low-latency,google-cloud-memorystore","A_Id":62178198,"CreationDate":"2020-06-02T20:17:00.000","Title":"Google Cloud Datastore latency","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I am using Python's ProcessPoolExecutor to run multiple processes in parallel and process them as any of them finishes. Then I look at their output and as soon as at least one of them gives satisfying answer I want to exit the program.\nHowever, this is not possible since upon calling pool.shutdown(wait=False) I will have to wait for all active tasks in the pool to finish before I can exit my script.\nIs there a way to kill all the remaining active children and exit?\nAlso, is there a better way to stop as soon as at least one child returns the answer we are waiting for?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":368,"Q_Id":62170309,"Users Score":1,"Answer":"What you're doing is not quite clear, but executors strike me as the wrong tool entirely.\nmultiprocessing.Pool seems much more suitable, and allows doing exactly what you're asking for: you can iterate on imap_unordered (or apply_async and poll the results), and once you have what you were looking for just terminate() the pool then join() it.","Q_Score":1,"Tags":"python,multiprocessing,executor,process-pool","A_Id":62170459,"CreationDate":"2020-06-03T10:11:00.000","Title":"Killing processes in ProcessPoolExecutor","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Background: I'm using a Python script with os.system() to repeatedly call a command line program to run test cases. The program being tested returns zero for normal operation and a negative value for error conditions. I compare this value against what is expected (not always zero) as part of determining pass\/fail. \nThe problem is that a normally exiting test case is returning zero, but os.system() is returning -1073740940. So far, other non-zero returns are working as expected, though the sample is small. \nI'm fairly confident the called program is returning zero because I output the return value to std out just before I return.  Also, if run the program with the same inputs from the command line or a batch file, the return value is zero. \nPossibly related, the C++ program generates a log file using ofstream with the same content as the command line - the same buffer is sent to std::cout and the log file. When controlled by the os.system() call, the log file content stops about 80% of the way into the execution of the program even though the cout information continues normally. As with the return value if run with the same inputs from the command line or a batch file, the log file completes correctly and has the same content as the terminal. \nBehavior is the same under Python 2.7 and 3.8 for both the return value and log file issues. \nMy question is: How do I diagnose this?  I'm not sure what else to try.","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":190,"Q_Id":62174199,"Users Score":1,"Answer":"So the short answer is that the value I'm getting is the exit code from the program, unless Windows feels it has something important to say. \nIn this case a DLL I was calling was corrupting the heap and cause windows to abort the execution. To get the actual 32 bit Windows return code and not a sign extended version I needed to AND it with 0xffffffff. I don't know if I can answer my own question, but gelonida set me on the right trail the answer.","Q_Score":1,"Tags":"python,c++,windows-10","A_Id":62472275,"CreationDate":"2020-06-03T13:36:00.000","Title":"Python os.system() returning bad value","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Can anyone tell me how to install turicreate on windows 7? I am using python of version 3.7. I have tried using pip install -U turicreate to install but failed.\nThanks in advance","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":178,"Q_Id":62179984,"Users Score":0,"Answer":"I am quoting from Turicreate website:\nTuri Create supports:\n\nmacOS 10.12+\nLinux (with glibc 2.12+)\nWindows 10 (via WSL)\n\nSystem Requirements\n\nPython 2.7, 3.5, or 3.6\nPython 3.7 macOS only\nx86_64 architecture\n\nSo Windows 7 is not supported in this case.","Q_Score":0,"Tags":"python-3.x","A_Id":65681216,"CreationDate":"2020-06-03T18:20:00.000","Title":"How to install turicreate on windows 7?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"So i installed both version 3.7.6 and 3.8.3 and i was trying to fix the \"pip is not recognized\" problem through YouTube,google etc.. but they all have the same similar step and it is to find the \"pip.exe\" file and add it to the system  yet i don't have a \"pip.exe\" file nor do i have a \"Scripts\" file i searched in the easy access (because that's where i find anything there) but i seemed to have no luck i also searched through the Python files but no luck whatsoever, am i doing something wrong?...maybe i installed a \"wrong version\" or something","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":318,"Q_Id":62189394,"Users Score":0,"Answer":"Upon installation of Python, the PATH environment variable is updated to point to the directory where Python is installed.\n1) Check PATH, if there exists no entry for Python, add the address pointing to your python.exe(Default path for Py3.7 is C:\\Program Files\\Python37 and for Py3.8 is C:\\Program Files\\Python38).\n2) Better yet just reinstall both of them, also please check the box which asks you to Disable the max PATH length and also the add to PATH checkbox.","Q_Score":0,"Tags":"python,python-3.x,pip","A_Id":62189609,"CreationDate":"2020-06-04T07:46:00.000","Title":"Cant find the pip.exe file","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I ran over following problem:\nIf I try to split the ssh terminal in pycharm it just opens a local powershell instead of a second remote shell. Is this normal? Do I have to change a default or something like this?\nI found nothing to this problem.\nMy wish endresult is to see 2 ssh terminals next to each other and not to have to switch tabs all the time. Is this possible?`","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":76,"Q_Id":62190539,"Users Score":0,"Answer":"Found a workaround which is not pretty nice but works.\nOpen ssh shells. Right click on them and select \"Move to Editor\" then you can put them one for one on the other screen and place each window as you like. \nIf there is a better way please let me know.","Q_Score":0,"Tags":"python,pycharm","A_Id":62190929,"CreationDate":"2020-06-04T08:51:00.000","Title":"PyCharm SSH Terminal split","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have got a single dask distributed script that reads a list of hosts from a file and deploys an SSH cluster for me (so far so good). I don't use the dask-worker command line tool as I would like everything to launch from one parent python script. I would like to use the cluster thus set up to run various jobs using subprocess.run or something similar on the worker nodes.\nThe processes that I want to run are python jobs that need to be started in an appropriate conda environment. This is where I come unstuck: attempting to activate a conda environment gets me Your shell has not been properly configured to use 'conda activate'. in stderr.\nI'm using subprocess.run with shell=True. Given that my normal shell is set up to use conda, I was slightly surprised by the error.\nThe dask distributed workers seem to have a very limited environment (my .bashrc isn't loaded) and I don't seem to be able to even source files to try to add to the environment. I have no problem activating the relevant conda env if I use a non-distributed set-up (distributed.Client()), so I guess it is something to do with the way that the dask distributed remote worker environment works. I know that conda and the relevant environments are available on the remote nodes (they all mount the same file system).\nSo, is there an easy way to say to a dask distributed remote worker: \"launch this python script using this conda environment\", preferably using subprocess.run?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":112,"Q_Id":62223569,"Users Score":0,"Answer":"This turned out to be a bash usage issue rather than anything to do with dask.\nIf we force bash to be interactive then we get the environment we expect and can run the jobs. I looked for a more elegant solution, but you quickly get bogged down in the details of what your distribution thinks it should use as the shell environment for login vs non-login shells, interactive vs non-interactive etc etc.","Q_Score":0,"Tags":"python,subprocess,environment,dask-distributed","A_Id":62280338,"CreationDate":"2020-06-05T20:21:00.000","Title":"Farming out subprocess jobs","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I run a python script from my command prompt once per day, but I want to automate this with task scheduler. I can only make it open Command Prompt, but I have to then run the python program manually. What am I missing?\n\nNew Folder myTasks\nCreate basic Task \nTask name, trigger, start a program\nProgram script\/ cmd.exe\nAdd Arguments: \"C:\\Users\\Matthew Olive\\PycharmProjects\\VOLALGO1\\scraper.py\"\nManually Run Task to test it\n\nAll I get is the command prompt opening up and it displays: C:\\WINDOWS\\system32>\nIt wont actually run the python script.\nIf I type python \"C:\\Users\\Matthew Olive\\PycharmProjects\\VOLALGO1\\scraper.py\"after C:\\WINDOWS\\system32> it will run just fine.","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":868,"Q_Id":62226118,"Users Score":0,"Answer":"Thanks CaffeinatedCoder! I figured it out!\nI used exactly that for the program\/script and it worked. Turns out it was running in the python terminal, but it would disappear immediately, so I added input(\"Press Enter to Exit...\")to the end of the python script.","Q_Score":0,"Tags":"python,command-line,scheduled-tasks","A_Id":62238659,"CreationDate":"2020-06-06T01:04:00.000","Title":"Task Scheduler opens command prompt but does not run python script","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"My understanding is that in general the OS Kernel (e.g. Linux) does not really have visibility into any threads created in user space. Moreover, I believe in Linux specifically the OS kernel only sees \"tasks\" or processes, and not \"threads\" per se. \nAdditionally, I'm not sure if CPython would actually ever use multiple threads for anything unless one uses explicitly e.g. the threading package in Python or one of the C standard Python libraries chooses to create threads itself. I suppose the exception here is multiprocessing or any Python libraries that may also spawn multiple processes, in which case the OS Kernel sees them as separate.\nUnder what set of of circumstances would the OS Kernel be aware of any threads created by a Python script, including any of the modules it may use?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":50,"Q_Id":62237543,"Users Score":1,"Answer":"In Linux:\ntask is a thread, process is an address space with one or more threads.\nUser-space threads are directly represented in the kernel. There is POSIX API to create threads pthread_create and there is Linux implementation of threading APIs called NPTL which maps one user-level thread to kernel-level task (task_struct).\nCPython multithreading module implements threads using pthread_create.","Q_Score":0,"Tags":"python,multithreading,kernel,cpython,gil","A_Id":62237746,"CreationDate":"2020-06-06T20:19:00.000","Title":"Under what circumstances would the OS be aware of threads created by Python?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a file structure that looks something like this:\nMaster:\n\nFirst\n\n\ntrain.py\nother1.py\n\nSecond\n\n\ntrain.py\nother2.py\n\nThird\n\n\ntrain.py\nother3.py\n\n\nI want to be able to have one Python script that lives in the Master directory that will do the following when executed:\n\nLoop through all the subdirectories (and their subdirectories if they exist)\nRun every Python script named train.py in each of them, in whatever order necessary\n\nI know how to execute a given python script from another file (given its name), but I want to create a script that will execute whatever train.py scripts it encounters. Because the train.py scripts are subject to being moved around and being duplicated\/deleted, I want to create an adaptable script that will run all those that it finds.\nHow can I do this?","AnswerCount":3,"Available Count":2,"Score":0.0665680765,"is_accepted":false,"ViewCount":142,"Q_Id":62239031,"Users Score":1,"Answer":"If you are using Windows you could try running them from a PowerShell script. You can run two python scripts at once with just this:\npython Test1.py\npython Folder\/Test1.py\nAnd then add a loop and or a function that goes searching for the files. Because it's Windows Powershell, you have a lot of power when it comes to the filesystem and controlling Windows in general.","Q_Score":0,"Tags":"python,tensorflow,directory,subdirectory","A_Id":62239246,"CreationDate":"2020-06-06T23:06:00.000","Title":"Running all Python scripts with the same name across many directories","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a file structure that looks something like this:\nMaster:\n\nFirst\n\n\ntrain.py\nother1.py\n\nSecond\n\n\ntrain.py\nother2.py\n\nThird\n\n\ntrain.py\nother3.py\n\n\nI want to be able to have one Python script that lives in the Master directory that will do the following when executed:\n\nLoop through all the subdirectories (and their subdirectories if they exist)\nRun every Python script named train.py in each of them, in whatever order necessary\n\nI know how to execute a given python script from another file (given its name), but I want to create a script that will execute whatever train.py scripts it encounters. Because the train.py scripts are subject to being moved around and being duplicated\/deleted, I want to create an adaptable script that will run all those that it finds.\nHow can I do this?","AnswerCount":3,"Available Count":2,"Score":0.0665680765,"is_accepted":false,"ViewCount":142,"Q_Id":62239031,"Users Score":1,"Answer":"Which OS are you using ?\nIf Ubuntu\/CentOS try this combination:\nimport os\n\/\/put this in master and this lists every file in master + subdirectories and then after the pipe greps train.py \ntrain_scripts = os.system(\"find . -type d | grep train.py  \") \n\/\/next execute them\npython train_scripts","Q_Score":0,"Tags":"python,tensorflow,directory,subdirectory","A_Id":62239087,"CreationDate":"2020-06-06T23:06:00.000","Title":"Running all Python scripts with the same name across many directories","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"My django app is containerized along side postgresql. The problem is that migrations do not seem to be persisting in the directory. Whenever I run docker exec -it <container_id> python manage.py makemigrations forum, the same migrations are detected. If I spin down the stack and spin it back up the and run makemigrations again, I see the same migrations detected. Changes to the fields, adding models, deleting models, none ever get detected. These migrations that do appear seem to be getting written to the database, as when I try to migrate, I get an error that there are existing fields already. But if I look at my migrations folder, only the init.py folder is present. All the migrate commands add no changes to the migrations folder.\nI also tried unregistered the post model from the admin and spinning up the stack, yet I still see it present in the admin. Same things with changes to the templates. No change I make sticks from inside docker seems to stick.\n*Note this problem started after I switched to wsl 2 and enabled it in docker desktop (windows)\n**Update migrations can be made from bash of docker container","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":70,"Q_Id":62247294,"Users Score":0,"Answer":"I found out what the problem was. My docker-stack.yml file was pointed to a directory that did not exist in the dockerfile.","Q_Score":0,"Tags":"django,python-3.x,docker","A_Id":62267183,"CreationDate":"2020-06-07T15:03:00.000","Title":"Django migrations not persisting","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"So in my case, I have a class Gnome for example and I want to destroy each object of this class when its variable health reaches 0. Is there a way for me to delete each instance of Gnome when its hp is 0 or should I \"mark it for death\" and delete everything that was marked? Either way, how can I do this?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":36,"Q_Id":62247738,"Users Score":0,"Answer":"Unfortunately, there isn't a way to do what you're wanting.  Every Python object maintains a record of how many references there are to it.  Once the reference count reaches 0, the Python garbage collector will clean it up.\nAs long as you still have references to the instances, they will persist.","Q_Score":1,"Tags":"python,python-3.x","A_Id":62247789,"CreationDate":"2020-06-07T15:39:00.000","Title":"How do i delete instances of a class from within it","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"When I type the line python3 --version into my mac terminal, it comes up as 3.7.6. If I type the same line in VSCode's terminal, I get 3.7.7. I wouldn't have thought it much an, except I can't import tensorflow on the 3.7.6 version which seems to also be causing issues with Jupyter since Anaconda runs it off Mac's terminal.\nbrew install python registers 3.7.7 as installed on the terminal, but even after re-installing and forcing the terminal closed and re-opened it still registers 3.7.6. Any insight into the problem would be helpful!","AnswerCount":3,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":810,"Q_Id":62250971,"Users Score":0,"Answer":"It's because you have 2 versions installed. One from IDE(VSCode-3.7.7) and one from your own install(from the terminal-3.7.6).\nJust uninstall  the 3.7.6 version, download and install a version that is compatible with tensorflow.\nOr you can create a new virtual environments for python with conda.","Q_Score":2,"Tags":"python,python-3.x,macos,terminal","A_Id":62251153,"CreationDate":"2020-06-07T20:05:00.000","Title":"Mac Terminals Shows Two Different Versions of Python","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm using confluent-Kafka with python.\nI want to connect Kafka to Hdfs and store some particular data direct in Hdfs.\nI found the confluent HDFS connector, but I didn't get how to connect it with my python script.\nany idea ? or any alternative methods to store messages directly from Kafka to Hdfs?","AnswerCount":2,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":389,"Q_Id":62260047,"Users Score":1,"Answer":"I didn't get how to connect it with my python script\n\nKafka Connect is written in Java, so you cannot integrate with Python. If the documentation could be more clear on this, you should let somebody know. \nThat being said, it does have a REST API. You would use requests or urllib.request to interact with it from Python, just as any other HTTP service\n\nYou could also use PySpark \/ Flink \/ Beam to transfer data from Kafka to HDFS in Python","Q_Score":0,"Tags":"python,apache-kafka,hdfs,apache-kafka-connect,confluent-platform","A_Id":62274586,"CreationDate":"2020-06-08T10:31:00.000","Title":"store message from kafka to hdfs","Data Science and Machine Learning":1,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a script which was written on Windows OS using Python 3.6.5.\nI tried to run the code on Unix OS which has Python 2.6.6 installed, but received an error for the different Syntax and the unrecognized libraries.\nIs there a way to use Python 3.X on my Unix server specifically for my code without upgrading the Python home version?","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":68,"Q_Id":62261615,"Users Score":0,"Answer":"No, there is no way to run Python3.X using Python2.x.","Q_Score":0,"Tags":"python,version","A_Id":62261922,"CreationDate":"2020-06-08T12:01:00.000","Title":"how to run python 3 script on Unix with python 2 installation","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I installed pipenv and python@3.8 a few months ago.\nIf I type \"brew info pipenv\", it shows me dependencies and whether or not they are satisfied (with the red X or the green check mark).\nToday, I ran \"brew update\", which updated the pipenv and python@3.8 formulae, along with updating Homebrew from 2.2.17 to 2.3.0.\nIf I didn't upgrade pipenv (not update) or python@3.8, why does a \"brew info pipenv\" under the dependencies section now show python@3.8 with a red check mark?\nI'm going all of this on Mac OS X. I also have a very limited understanding of Linux, so assume I don't know much at all. I'm just trying to understand a little more than I did before :)","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":61,"Q_Id":62271901,"Users Score":0,"Answer":"If you found formula problem, you can always run brew reinstall <formula> to re-configure it. In my case, the brew info pipenv does show green though.","Q_Score":1,"Tags":"python,homebrew","A_Id":62749283,"CreationDate":"2020-06-08T22:03:00.000","Title":"Dependencies failed according to \"brew info pipenv\" after \"brew update\" on Mac OS X","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a dataflow job that reads from pubsub, transforms the PubsubMessage into a TableRow and writes this row to BQ using the FILE_LOAD-method (each 10 minutes, 1 shard). The job sometimes throws a ByteString would be too long-exception. This exception should be thrown when it concats the rows to the Google Cloud Storage (GCS) temp file as you cannot append to a GCS file. If I understand it correctly, it is ok to let this exception happen as the 'large' temp file will be used for loaded to BQ later on and appending will happen to a new file which should succeeded. I would however like to prevent this error from happening without increasing the number of load jobs as I'm getting close to my daily load jobs quota on the project.\nCan I:\n\nincrease the number of shards to 2? Or will that cause the writer to always use 2 shards even if it only needs to write a small number of rows?\nuse setMaxFileSize() along with the number of shards? Or will the writer still use 2 shards even if it doesn't really have too? \n\nThanks in advance!","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":113,"Q_Id":62284178,"Users Score":1,"Answer":"Setting the number of shards to 2 will always use 2 shards.\nHowever, I don't think the \"ByteString would be too long\" error is coming from GCS.  That error usually happens when the total output size of a bundle in Dataflow is too large (>2GB), which can happen when a DoFn's output is much larger than its input.\nOne option to work around this would be to break apart the bundles coming in from Pubsub with a GroupByKey.  You can use a hash of the input or a random number as the key, and set your trigger to AfterPane.elementCountAtLeast(1) to allow elements to be output as soon as they arrive.","Q_Score":0,"Tags":"python,google-cloud-dataflow,apache-beam","A_Id":62288982,"CreationDate":"2020-06-09T13:47:00.000","Title":"BigqueryIO file loads: only use additional shard if required","Data Science and Machine Learning":0,"Database and SQL":1,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I don't know how it happened, but my sys.path now apparently contains the path to my local Python project directory, let's call that \/home\/me\/my_project. (Ubuntu).\necho $PATH does not contain that path and echo $PYTHONPATH is empty.\nI am currently preparing distribution of the package and playing with setup.py, trying to always work in an virtualenv. Perhaps I messed something up while not having a virtualenv active. Though I trying to re-install using python3 setup.py --record (in case I did an accidental install) fails with insufficient privileges - so I probably didn't accidentally install it into the system python.\nDoes anyone have an idea how to track down how my module path got to the sys.path and how to remove that?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":53,"Q_Id":62292976,"Users Score":0,"Answer":"I had the same problem. I don't have the full understanding of my solution, but here it is nonetheless.\nMy solution\nRemove my package from site-packages\/easy-install.pth\n(An attempt at) explanation\nThe first hurdle is to understand that PYTHONPATH only gets added to sys.path, but is not necessarily equal to it. We are thus after what adds the package into sys.path.\nThe variable sys.path is defined by site.py.\nOne of the things site.py does is automatically add packages from site-packages into sys.path.\nIn my case, I incorrectly installed my package as a site-package, causing it to get added to easy-install.pth in site-packages and thus its path into sys.path.","Q_Score":0,"Tags":"python-3.x,setuptools","A_Id":64670582,"CreationDate":"2020-06-09T22:36:00.000","Title":"Project directory accidentally in sys.path - how to remove it?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I know it might be a bad design but since we are developing the django website on our laptops which runs Win7, I thought it would be better to run django on a Windows platform only in production.\n(Laptop is not powerful enough to run a Unix VM inside and our Unix team doesn't provide any Unix server with UI access (Only Putty) so using an IDE is impossible on Unix.)\nI have deployed django with gunicorn and nginx on a Linux server very easily, but this time I have to deploy django on a Windows server with Apache on another Unix server (I know it sucks).\nOur middleware team is asking(forcing) to run django components on a separate server so that they can manage their Apache (on Unix) instance comfortably. As far as I understand, Apache and django should reside on the same server for mod_wsgi to work.\nIs this possible to keep Apache on a Unix machine and make a django website run from a Windows machine?\nIf not, what are the best possible solutions in my case? (Switch django on Unix? Use waitress on Django windows? Do not separate Apache and Django? etc.)\nRegards,\nAditya","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":295,"Q_Id":62299359,"Users Score":0,"Answer":"The best thing in my modest point of view is to create a unix docker image of your project","Q_Score":1,"Tags":"python,django,windows,apache,waitress","A_Id":62312129,"CreationDate":"2020-06-10T08:43:00.000","Title":"Deploying django(windows) with apache(on unix)","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I recently installed Pop!_OS on my laptop for development purposes, but i found out the version of python installed is 3.8.2, which unfortunately doesnt support versions of tensorflow below 2.0. I need to use tensorflow 1.14 for my work and this is not possible with python 3.8.\nIm willing to use python 3.6 in a virtual environment or have it alongside 3.8 in my laptop. Im rather new to linux so please excuse any mistakes. Thanks in advance!","AnswerCount":3,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":3751,"Q_Id":62300705,"Users Score":0,"Answer":"easiest way is to create a virtual env with a specific python version\nvirtualenv envname --python=python3.6","Q_Score":2,"Tags":"python,debian-based","A_Id":64048270,"CreationDate":"2020-06-10T09:53:00.000","Title":"How to install python 3.6.10 alongside presinstalled 3.8.2","Data Science and Machine Learning":1,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am supposed to run following command for an assignment to analyze the functions in rsa.py\npython -m cProfile -s time rsa.py < tests\/1verdict32.in\nI am assuming this file uses tests\/1verdict32.in as in the input file to rsa.py.\nbut I am not familiar with how cProfile works with a file as an input\ncan someone explain to me how this is supposed to work? especially what is the relevance of \"<\" character in the above line?\nps: the directory structure is\nWD\/\n -rsa.py\n -hello.py\n -tests\/\n      -1verdict_32.in\nalso when I run above command, it gives \"system cannot find the file specified\" error\nbut the profiler works when I use it on file hello.py\ni.e. for the command: python -m cProfile -s time hello.py","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":76,"Q_Id":62306414,"Users Score":1,"Answer":"You have a typo.\nYour file is 1verdict_32.in, and you're attempting to pass in 1verdict32.in, without the underscore. That's why your shell complains.\nBeyond that, < ... is a simple shell redirection operator; it means that the shell (bash, zsh, fish, cmd, ...) opens the file ... and writes it into the process's standard input (in Python, that's sys.stdin).","Q_Score":0,"Tags":"python,input,cmd,cprofile","A_Id":62306636,"CreationDate":"2020-06-10T14:44:00.000","Title":"using cprofile with input files","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am very interested in learning Azure cloud service in-depth and trying to do something awesome here, but not sure where to go or how to solve it. I tried my best to find any helpful resource online, but no luck. So I need some azure wizard to help me with this, please.\nWhat I am trying to do is that I have a python script that I wrote on my local and want to deploy in Azure. My python script is designed to clean messy data that must be fed into the machine learning model. So, I created an email address where I receive the data from clients, and using azure logic apps, I will extract the files attached to that email and save it to azure blob storage. Then I want my python script to extract the data from azure blob storage and clean it then save it back to azure blob storage. Basically I want to automate the data cleaning steps in azure. Can anyone help me with which activity or service I should use to achieve this? \nI really appreciate your help in advance.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":3119,"Q_Id":62316695,"Users Score":2,"Answer":"Here is what you can do \n1) Create a logic app to trigger on the email that you receive in your mail box. You can refine the way trigger is invoked meaning you have particular subject line, a particular folder etc\n2) You can extract the data from files and feed to the storage account (You can also look at using CosmosDb)\n3) Create an azure function which uses blob trigger or uses event gird trigger (To listen to Blob Creation event)\n4) Write the logic to clean the data","Q_Score":0,"Tags":"python,azure,azure-logic-apps,azure-blob-storage,azure-databricks","A_Id":62316822,"CreationDate":"2020-06-11T03:42:00.000","Title":"How to deploy python in Azure logic apps?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have installed docker in my windows machine using 'pip install docker' command but system is unable to figure out the existence of docker though added in environment variables (pip docker path).\nAdded path (Environment variables): C:\\Users\\Name\\foo\\local\\boo\\python\\python38-32\\lib\\site-packages\\docker\n'docker' is not recognized as an internal or external command,\noperable program or batch file.\nThere are lots of similar questions posted in this forum but apparently they did not help my case so for.\nCould someone assist?","AnswerCount":3,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":3316,"Q_Id":62325022,"Users Score":0,"Answer":"Try restarting windows and check if the error still continues. I had this error once and as incredible as it seems it solved my problem. I hope it helps, friend. Or try this command in CMD: refreshenv","Q_Score":0,"Tags":"python,docker","A_Id":62325171,"CreationDate":"2020-06-11T13:00:00.000","Title":"'docker' is not recognized as an internal or external command","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"If I made python 3.x program that run on windows cmd and print some log.\nWill it consume all memory in RAN in long term? or CMD will delete old log by its self?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":25,"Q_Id":62351188,"Users Score":3,"Answer":"CMD will remove the old log\/output. So nothing will be broken.","Q_Score":1,"Tags":"python-3.x,cmd","A_Id":62351217,"CreationDate":"2020-06-12T19:29:00.000","Title":"Will Python print() broke CMD in long term?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to write a status bar module for dwm in python. I want the status bar to change to a specific string when pacman \/ apt or dnf is running. Is there a distribution independent way to check if some package manager is currently running and is it possible to extract information from it for example the download progress so it can be displayed in the status bar.","AnswerCount":2,"Available Count":2,"Score":0.0996679946,"is_accepted":false,"ViewCount":439,"Q_Id":62351677,"Users Score":1,"Answer":"After some research and messing around the \/var\/lib\/pacman\/ folder I discovered that pacman and other package managers all create a file named db.lck file when running and I just checked if the files existed and it did the trick. I currently still can't find a way to access the output of the commands but it's better than nothing.","Q_Score":1,"Tags":"python,linux,archlinux,package-managers,debian-based","A_Id":62353240,"CreationDate":"2020-06-12T20:02:00.000","Title":"Is there a way to see if a package manager is currently running on linux?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to write a status bar module for dwm in python. I want the status bar to change to a specific string when pacman \/ apt or dnf is running. Is there a distribution independent way to check if some package manager is currently running and is it possible to extract information from it for example the download progress so it can be displayed in the status bar.","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":439,"Q_Id":62351677,"Users Score":0,"Answer":"Just a thought - pacman seems to be fairly verbose in its logging to \/var\/log\/pacman.log, so tailing that file when the lock is active will at least tell you what's going on at the moment.","Q_Score":1,"Tags":"python,linux,archlinux,package-managers,debian-based","A_Id":64393047,"CreationDate":"2020-06-12T20:02:00.000","Title":"Is there a way to see if a package manager is currently running on linux?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a Jupyter lab installed on Windows. I installed Jupyter Lab on WSL Ubuntu. I can lunch Jupyter Lab from Linux terminal.  This will open Jupyter Lab on Chrome browser from which I can start a new Jupyter Notebook with Python [conda env:root]*. However, it only shows the windows file system. I try to open my note book that is saved on the Linux file system using: \n$ jupyter lab my_linux_folder\/my_notebook.ipynb\nJupyter lab lunches successfully, but cannot open the notebook that is on the Linux file system and gives an error:\n\nCannot open \n  Could not find path: \/my_notebook.ipynb\n\nIs it possible to open a notebook that is on the Linux file system \"\\wsl$\\\" and how? \nHow to go to \"\\wsl$\\\" from JupyterLab file browser? \nOr more generally how to open a notebook that is saved under \"\\wsl$\\\"  ?","AnswerCount":6,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":10840,"Q_Id":62353890,"Users Score":0,"Answer":"Try going to \\\\wsl$\\{wsl distro name}\\home\\{user name}\\my_linux_folder\\\nLonger explanation: browse to \\\\wsl$\\ and see what you see there. There should be a distro name (Ubuntu, perhaps?) then you will have access to the root filesystem of your WSL. You can go to the home directory, then select your username, then your files should look familiar.\nYou could go the other way, and point Jupyter to a windows folder from Linux. However, assuming you might be using WSL2, the first method has much better performance.","Q_Score":5,"Tags":"python,jupyter-notebook,filesystems,windows-subsystem-for-linux,jupyter-lab","A_Id":62371488,"CreationDate":"2020-06-12T23:38:00.000","Title":"Windows Subsystem for Linux (WSL 2) and Jupyter Lab : How to open a Jupyter Notebook saved at the Linux file system?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"is a Linux based system needed for python hacking? I just watching my Udemy ethical hacking with python course and\nhe kept saying you need Linux based O.P system.\nWhy you need a Linux Operating System\nI didn't understand it because he didn't explain why we need to use it so I'm asking here can you explain?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":96,"Q_Id":62364149,"Users Score":1,"Answer":"In general, you don't need a GNU\/Linux system to learn Python, but since you are learning it with an online course the course's materials may be written for a certain GNU\/Linux distribution. So, it would be easier for you to follow the course if you have the software suggested for the course.\nIn the course you mentioned, they use Kali Linux, a distribution for security and forensic professionals. I suppose, it has a lot of tools for hacking preinstalled and working out of the box. In the introduction, the course also describes how to install the distribution in a virtual  machine, so you can use it on a Mac or Windows.","Q_Score":0,"Tags":"python,linux","A_Id":62364291,"CreationDate":"2020-06-13T18:38:00.000","Title":"is linux based system needed for python hacking?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I know there are several ways to kill a process if I know the process id.\nBut similar to ctrl+C in keyboard interrupt, looking for such interrupt using a command.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":76,"Q_Id":62373356,"Users Score":0,"Answer":"use this Command to kill the process(\nkillall -s 9 [process name]  )","Q_Score":0,"Tags":"python,linux,process,kill","A_Id":62373407,"CreationDate":"2020-06-14T13:44:00.000","Title":"How can I stop the running command in linux without knowing the pid?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I want to append something on entity while it exists and do not append the entity if it doesn't exist. How will I be able to achieve it? I tried following but it doesn't work the way I want.\ntask = table_service.get_entity('datas', '..com','asss','Hello')\ntable_service.insert_or_replace_entity('tasktable', task)\nIf the entity exists :\nI want to append that hello with something as:\n('datas', '..com','asss','Hello;123')\nIf the entity doesnt exist :\nI want to insert as:\n('datas', '..com','asss','Hello')","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":211,"Q_Id":62375424,"Users Score":0,"Answer":"If you want to append something to one existing entity property's value, it is impossible. Because Azure table storage does not provide any operation to do that.  Azure Table storage just provides operations to manage entity and it does not provide operations to manage Azure table entity properties. So you just can set a new value for one existing entity property. \nRegarding how to do that, we can use update or merge operation. But please note that the two operations will cause  different result. The update operation replaces the entire entity. Those properties from the previous entity will be removed if the request does not define or include them. The merge operation does not replace the existing entity. Those properties from the previous entity will be retained if the request does not define or include them.","Q_Score":0,"Tags":"python-3.x,azure,azure-cosmosdb,azure-table-storage","A_Id":62441229,"CreationDate":"2020-06-14T16:39:00.000","Title":"Append Entity on Microsoft Azure Table Storage Insert or Replace","Data Science and Machine Learning":0,"Database and SQL":1,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I'm trying to figure out the position of the moon given an observer in a lunar orbit. I have searched the internet already, but cannot find if PyEphem has this capability. Any suggestions?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":26,"Q_Id":62379196,"Users Score":1,"Answer":"PyEphem does not, alas, have that capability.","Q_Score":0,"Tags":"python,astronomy,pyephem","A_Id":62387529,"CreationDate":"2020-06-14T23:05:00.000","Title":"PyEphem -- satellites with a lunar orbit?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am executing a python script from my terminal by python myscript.py. Then I am asked for the password as in my code I am using os.system(\"sudo some_command_here\"). But when I run the same code from the terminal by sudo python myscript.py. it shows me SyntaxError: invalid syntax. if I comment out that line just to check  if it resolves, but I still get the same error in some other line of code. Am I doing something wrong, why it gives me that error.","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":1344,"Q_Id":62385476,"Users Score":0,"Answer":"In case you are using a virtual environment for your python, it might be that your system's python version is different than the one you have in the venv and the sudo command always uses the system version. Using python3 instead of python for the sudo may solve the problem.","Q_Score":0,"Tags":"python,linux,terminal,syntax-error,sudo","A_Id":62752512,"CreationDate":"2020-06-15T09:42:00.000","Title":"Invalid Syntax error for running python script with sudo","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"thanks for reading this. I am using macOS High Sierra. I am not very familiar with terminal or environment variables, but am trying to learn more. From reading other threads and google, it seems like I either have multiple pythons installed, or have pythons running from different paths. However I am not able to find a solution to resolving this, either by re-pathing my IDLE or deleting it entirely. \nI do have python, python launcher, and anaconda (not very sure how anaconda works, have it installed a few years back and didn't touch it) installed. I am trying to install pandas (pip install pandas), which tells me that I have it installed, but when I run it on IDLE, it says module not found. Though if i run python3 on terminal and type my code in, it works (so pandas has indeed been installed).\nWhen i run which python on terminal, it returns\n\/Users\/myname\/anaconda3\/bin\/python\n(when i enter into this directory from terminal, it shows that in the bin folder, I have python, python.app, python3, python3-config, python3.7, python3.7-config, python3.7m, python3.7m-config)\nWhen i run which idle on terminal, it returns\n\/usr\/bin\/idle (im not even sure how to find this directory from the terminal) \nWhen i run import os; print(os.path) on IDLE, it returns module 'posixpath' from '\/Library\/Frameworks\/Python.framework\/Versions\/3.7\/lib\/python3.7\/posixpath.py'\nWould really appreciate some help to figure out how to ensure that when i install modules from terminal, it would be installed into the same python as the one IDLE is using. Also, I would like to know whether it is possible for me to work on VSCode instead of IDLE. I cant seem to find suitable extensions for data science and its related modules (like statsmodels, pandas etc). Thanks a lot!","AnswerCount":3,"Available Count":3,"Score":0.0665680765,"is_accepted":false,"ViewCount":904,"Q_Id":62392889,"Users Score":1,"Answer":"First: This would be a comment if I had enough reputation.\nSecond: I would just delete python. Everything. And reinstall it.","Q_Score":1,"Tags":"python,python-idle","A_Id":62393176,"CreationDate":"2020-06-15T16:39:00.000","Title":"IDLE and python is different, not able to install modules properly","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"thanks for reading this. I am using macOS High Sierra. I am not very familiar with terminal or environment variables, but am trying to learn more. From reading other threads and google, it seems like I either have multiple pythons installed, or have pythons running from different paths. However I am not able to find a solution to resolving this, either by re-pathing my IDLE or deleting it entirely. \nI do have python, python launcher, and anaconda (not very sure how anaconda works, have it installed a few years back and didn't touch it) installed. I am trying to install pandas (pip install pandas), which tells me that I have it installed, but when I run it on IDLE, it says module not found. Though if i run python3 on terminal and type my code in, it works (so pandas has indeed been installed).\nWhen i run which python on terminal, it returns\n\/Users\/myname\/anaconda3\/bin\/python\n(when i enter into this directory from terminal, it shows that in the bin folder, I have python, python.app, python3, python3-config, python3.7, python3.7-config, python3.7m, python3.7m-config)\nWhen i run which idle on terminal, it returns\n\/usr\/bin\/idle (im not even sure how to find this directory from the terminal) \nWhen i run import os; print(os.path) on IDLE, it returns module 'posixpath' from '\/Library\/Frameworks\/Python.framework\/Versions\/3.7\/lib\/python3.7\/posixpath.py'\nWould really appreciate some help to figure out how to ensure that when i install modules from terminal, it would be installed into the same python as the one IDLE is using. Also, I would like to know whether it is possible for me to work on VSCode instead of IDLE. I cant seem to find suitable extensions for data science and its related modules (like statsmodels, pandas etc). Thanks a lot!","AnswerCount":3,"Available Count":3,"Score":1.2,"is_accepted":true,"ViewCount":904,"Q_Id":62392889,"Users Score":1,"Answer":"First of all, a quick description of anaconda:\nAnaconda is meant to help you manage multiple python \"environments\", each one potentially having its own python version and installed packages (with their own respective versions). This is really useful in cases where you would like multiple python versions for different tasks or when there is some conflict in versions of packages, required by other ones. By default, anaconda creates a \"base\" environment with a specific python version, IDLE and pip. Also, anaconda provides an improved way (with respect to pip) of installing and managing packages via the command conda install <package-name>.\nFor the rest, I will be using the word \"vanilla\" to refer to the python\/installation that you manually set up, independent of anaconda.\nExplanation of the problem:\nNow, the problem arises since you also installed python independently. The details of the problem depend on how exactly you set up both python and anaconda, so I cannot tell you exactly what went wrong. Also, I am not an OSX user, so I have no idea how python is installed and what it downloads\/sets alongside.\nBy your description however, it seems that the \"vanilla\" python installation did not overwrite neither your anaconda python nor anaconda's pip, but it did install IDLE and set it up to use this new python.\nSo right now, when you are downloading something via pip, only the python from anaconda is able to see that and not IDLE's python.\nPossible solutions:\n1. Quick fix:\nJust run IDLE via \/Users\/myname\/anaconda3\/bin\/idle3 every time. This one uses anaconda's python and should be able to see all packages installed via conda install of pip install (*). I get this is tiresome, but you don't have to delete anything. You can also set an \"alias\" in your ~\/.bashrc file to make the command idle specifically linking you there. Let me know with a comment if you would like me to explain how to do that, as this answer will get too long and redundant.\n2. Remove conda altogether (not recommended)\nYou can search google on how to uninstall anaconda along with everything that it has installed. What I do not know at this point is whether your \"vanilla\" python will become the default, whether you will need to also manually install pip again and whether there is the need to reinstall python in order for everything to work properly.\n3. Remove your python \"vanilla\" installation and only use anaconda\nAgain, I do not know how python installation works in OSX, but it should be reasonably straightforward to uninstall it. The problem now is that probably you will not have a launcher for IDLE (since I am guessing anaconda doesn't provide one on OSX) but you will be able to use it via the terminal as described in 1..\n4. Last resort:\nIf everything fails, simply uninstall both your vanilla python (which I presume will also uninstall IDLE) and anaconda which will uninstall its own python, pip and idle versions. The relevant documentation should not be difficult to follow. Then, reinstall whichever you want anew.\nFinally:\nWhen you solve your problems, any IDE you choose, being VScode (I haven't use that either), pycharm or something else, will probably be able to integrate with your installed python. There is no need to install a new python \"bundle\" with every IDE.\n\n(*): Since you said that after typing pip install pandas your anaconda's python can import pandas while IDLE cannot, I am implying in my answer that pip is also the one that comes with anaconda. You can make sure this is the case by typing which pip which should point to an anaconda directory, probably \/Users\/myname\/anaconda3\/bin\/pip","Q_Score":1,"Tags":"python,python-idle","A_Id":62395898,"CreationDate":"2020-06-15T16:39:00.000","Title":"IDLE and python is different, not able to install modules properly","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"thanks for reading this. I am using macOS High Sierra. I am not very familiar with terminal or environment variables, but am trying to learn more. From reading other threads and google, it seems like I either have multiple pythons installed, or have pythons running from different paths. However I am not able to find a solution to resolving this, either by re-pathing my IDLE or deleting it entirely. \nI do have python, python launcher, and anaconda (not very sure how anaconda works, have it installed a few years back and didn't touch it) installed. I am trying to install pandas (pip install pandas), which tells me that I have it installed, but when I run it on IDLE, it says module not found. Though if i run python3 on terminal and type my code in, it works (so pandas has indeed been installed).\nWhen i run which python on terminal, it returns\n\/Users\/myname\/anaconda3\/bin\/python\n(when i enter into this directory from terminal, it shows that in the bin folder, I have python, python.app, python3, python3-config, python3.7, python3.7-config, python3.7m, python3.7m-config)\nWhen i run which idle on terminal, it returns\n\/usr\/bin\/idle (im not even sure how to find this directory from the terminal) \nWhen i run import os; print(os.path) on IDLE, it returns module 'posixpath' from '\/Library\/Frameworks\/Python.framework\/Versions\/3.7\/lib\/python3.7\/posixpath.py'\nWould really appreciate some help to figure out how to ensure that when i install modules from terminal, it would be installed into the same python as the one IDLE is using. Also, I would like to know whether it is possible for me to work on VSCode instead of IDLE. I cant seem to find suitable extensions for data science and its related modules (like statsmodels, pandas etc). Thanks a lot!","AnswerCount":3,"Available Count":3,"Score":0.0,"is_accepted":false,"ViewCount":904,"Q_Id":62392889,"Users Score":0,"Answer":"To repeat and summarized what has been said on various other question answers:\n1a. 3rd party packages are installed for a particular python(3).exe binary.\n1b. To install multiple packages to multiple binaries, see the option from python -m pip -h.\n\nTo find out which python binary is running, execute import sys; print(sys.executable).\n\n3a. For 3rd party package xyz usually installed in some_python\/Lib\/site-packages, IDLE itself has nothing to do with whether import xyz works.  It only matters whether xyz is installed for 'somepython' (see 1a).\n3b. To run IDLE with 'somepython', run somepython -m idlelib in a terminal or console.\nsomepython can be a name recognized by the OS or a path to a python executable.","Q_Score":1,"Tags":"python,python-idle","A_Id":62396210,"CreationDate":"2020-06-15T16:39:00.000","Title":"IDLE and python is different, not able to install modules properly","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a problem. When writing the \"pip install pyowm\" command to the console, the module is installed, but the system doesn't see it. For example, Phyton, when executing the command \"impor pyowm\", gives an error, and when writing the command \"pyowm\" to the console, the error \"\" pyowm \" is not an external or internal command\".\nAll of the above apply to other modules as well.\nP.S. I use VS Code and Python v.3.8.3","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":80,"Q_Id":62393397,"Users Score":0,"Answer":"You can't just use any tool just by name from the console.\nYou have to first enter python to the console and then try import pyowm again.\nIt should import pyowm. But later you may want to actually use pyowm. Then you use this import most of the time:\nfrom pyowm.owm import OWM","Q_Score":1,"Tags":"command-line,module,pypi,python-3.8","A_Id":62395686,"CreationDate":"2020-06-15T17:11:00.000","Title":"The inability to install the module on Python","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Apparently it is supposed to be part of Python3 but it says \"bash: sqlite3: command not found\". \nI'm so new to all of this and I'm just trying to follow along with a tutorial on youtube. Any help would be much appreciated.","AnswerCount":2,"Available Count":1,"Score":0.2913126125,"is_accepted":false,"ViewCount":5263,"Q_Id":62400753,"Users Score":3,"Answer":"On Linux (or in a Docker container running a Linux OS variant), you can install the command line interface via sudo apt-get install sqlite3 and then run sqlite3.","Q_Score":5,"Tags":"python,python-3.x,sqlite","A_Id":69657658,"CreationDate":"2020-06-16T04:05:00.000","Title":"bash: sqlite3: command not found","Data Science and Machine Learning":0,"Database and SQL":1,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"all!\nWe currently use MTPuTTY to SSH into a Red Hat Linux server to run Python programs on a compute cluster. I was wanting to implement read-only access to a PostgreSQL database into these programs using the current credentials used for SSH. I know you can't access the password via Linux and it would be (very) bad practice to store the passwords in plaintext (does this still count for folders only accessible by the users?, ie dedicated network storage folders? I suppose that would depend on if admins have access to those folders as well).\nI was hoping there would be some way to use the current SSH session credentials to authenticate with the database and fetch records into the Python program, but can't seem to find a way to do that. Is there a way? Is there an alternative?\nOther options I've thought of:\n\nCreate server to take requests using my credentials, fetch records,\nreturn records to program.\nRun service\/scheduled task to fetch values every [x] minutes, store\nin a file accessible only by my group (though not sure how to do\nthis without storing my password in an accessible manner).\n\nJust really not seeing a safe way to automate this access without exposing passwords... Any help is much appreciated! Thank you!","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":73,"Q_Id":62417506,"Users Score":0,"Answer":"You should be able to make both Linux and PostgreSQL use PAM.\nBut why not just keep it simple and use peer authentication?  The fact that you logged on to the linux account shows you knew the password to do that log on.  Isn't that enough?","Q_Score":0,"Tags":"python,linux,postgresql,security,passwords","A_Id":62419280,"CreationDate":"2020-06-16T20:59:00.000","Title":"Using current Linux SSH Credentials to authenticate for database access in python program","Data Science and Machine Learning":0,"Database and SQL":1,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"the code (from googletrans import Translator) brings up the following error:\n\nTraceback (most recent call last):   File\n  \"\/Users\/cadeylange\/Documents\/python_work\/Personal\/frequently_used_words.py\",\n  line 2, in <module>\n      from googletrans import Translator ModuleNotFoundError: No module named 'googletrans' [Finished in 0.3s with exit code 1] [cmd:\n  ['\/usr\/local\/bin\/python3', '-u',\n  '\/Users\/cadeylange\/Documents\/python_work\/Personal\/frequently_used_words.py']]\n  [dir: \/Users\/cadeylange\/Documents\/python_work\/Personal] [path:\n  \/Library\/Frameworks\/Python.framework\/Versions\/3.8\/bin:\/Library\/Frameworks\/Python.framework\/Versions\/3.8\/bin:\/Library\/Frameworks\/Python.framework\/Versions\/3.7\/bin:\/Library\/Frameworks\/Python.framework\/Versions\/3.7\/bin:\/usr\/local\/bin:\/usr\/bin:\/bin:\/usr\/sbin:\/sbin]\n\nI've double-checked that the googletrans has been installed successfully using pip and it has. I cannot think of why the code won't work, I've tried importing it using different expressions including the basic \"import googletrans\" statement. Could anyone see the problem?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":830,"Q_Id":62425250,"Users Score":0,"Answer":"Reading the traceback shows, you're running Python 3 on a Linux box, right? Have you tried installing the module with pip3, what should make it availble for Python 3.","Q_Score":1,"Tags":"python,error-handling,module","A_Id":62425679,"CreationDate":"2020-06-17T08:59:00.000","Title":"ModuleNotFoundError: No module named 'googletrans'","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to download utilities module with pip install utilities but i get this error\n\nERROR: Could not find a version that satisfies the requirement utilities (from versions: none)\nERROR: No matching distribution found for utilities\n\nPython Version : 3.8.2\nOS : Windows 10","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":82,"Q_Id":62427570,"Users Score":1,"Answer":"try with this command:\npython3 -m pip install utilities","Q_Score":0,"Tags":"python,python-3.x","A_Id":62427605,"CreationDate":"2020-06-17T11:08:00.000","Title":"I get error while downloading utilities module - Python","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"So I've made a script\/code in python idle and want to run it on python.exe but whenever I do this the you can see the python window pop up briefly for a second before closing, and I want to run my code using python instead of idle, how can I do this?","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":241,"Q_Id":62442077,"Users Score":1,"Answer":"since I cant comment yet:\ngo to the command line and open the file location directory and type:   python filename.py","Q_Score":1,"Tags":"python,python-idle","A_Id":62442104,"CreationDate":"2020-06-18T03:51:00.000","Title":"Python idle to python.exe","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I cannot access my Django app on an EC2 instance (host2) in my browser by typing its public DNS name with port number: ec2-public-dns-of-this-instance.compute-1.amazonaws.com:8000\n\nI'm using the same Security Group that my other EC2 instance (host1) is using which is working just fine (my other Django app hosted on this instance works perfectly fine), with HTTP\/TCP open on 0.0.0.0\/0 on port 8000\nI started my Django project this way: .\/manage.py runserver 0.0.0.0:8000\nI've added hosts into my ALLOWED_HOSTS file which has these now: ALLOWED_HOSTS = ['*', '127.0.0.1', 'ec2-public-dns-of-this-instance.compute-1.amazonaws.com', '0.0.0.0', 'localhost']\nI was able to curl localhost:8000 which returned me 200 and Django default HTML page when I'm ssh'ed into this instance.\nI was able to curl ec2-public-dns-of-this-instance.compute-1.amazonaws.com:8000 which also returned me 200 and Django default HTML page when I'm ssh'ed into this instance.\nboth host1 and host2 are using the exactly the same subnet, VPC, SG, AMI, in the same AZ.\nboth host1 and host2 are running on AMI Ubuntu 18.04 LTS\n\nAny ideas how to fix this would be greatly appreciated!","AnswerCount":1,"Available Count":1,"Score":0.3799489623,"is_accepted":false,"ViewCount":740,"Q_Id":62458709,"Users Score":2,"Answer":"Interestingly, it started working three hours later.\nI didn't change anything and all things remain the same as I described above.\nI have no clue why this is the case...","Q_Score":3,"Tags":"python,django,amazon-web-services,amazon-ec2,aws-security-group","A_Id":62463395,"CreationDate":"2020-06-18T20:18:00.000","Title":"Cannot access my Django page hosted on AWS EC2 instance","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"ive updated to python3 and downloaded virtualenv using:\n sudo \/usr\/bin\/easy_install virtualenv\nwhen i go to start the virtualenv i got the following error message :\nvirtualenv project1\nTraceback (most recent call last):\n  File \"\/usr\/local\/bin\/virtualenv\", line 6, in <module>\n    from pkg_resources import load_entry_point\n  File \"\/System\/Library\/Frameworks\/Python.framework\/Versions\/2.7\/Extras\/lib\/python\/pkg_resources\/__init__.py\", line 3241, in <module>\n    @_call_aside\n  File \"\/System\/Library\/Frameworks\/Python.framework\/Versions\/2.7\/Extras\/lib\/python\/pkg_resources\/__init__.py\", line 3225, in _call_aside\n    f(*args, **kwargs)\n  File \"\/System\/Library\/Frameworks\/Python.framework\/Versions\/2.7\/Extras\/lib\/python\/pkg_resources\/__init__.py\", line 3254, in _initialize_master_working_set\n    working_set = WorkingSet._build_master()\n  File \"\/System\/Library\/Frameworks\/Python.framework\/Versions\/2.7\/Extras\/lib\/python\/pkg_resources\/__init__.py\", line 585, in _build_master\n    return cls._build_from_requirements(__requires__)\n  File \"\/System\/Library\/Frameworks\/Python.framework\/Versions\/2.7\/Extras\/lib\/python\/pkg_resources\/__init__.py\", line 598, in _build_from_requirements\n    dists = ws.resolve(reqs, Environment())\n  File \"\/System\/Library\/Frameworks\/Python.framework\/Versions\/2.7\/Extras\/lib\/python\/pkg_resources\/__init__.py\", line 786, in resolve\n    raise DistributionNotFound(req, requirers)\npkg_resources.DistributionNotFound: The 'zipp>=0.4' distribution was not found and is required by importlib-resources\ni looked around and realised the that 'zipp' had not been installed so i installed that also. when i went to run the virtualenv again i got the same error message again as above. and for some reason it keeps referencing python 2.7 even though ive upgraded to python3.","AnswerCount":4,"Available Count":3,"Score":-0.049958375,"is_accepted":false,"ViewCount":1488,"Q_Id":62459220,"Users Score":-1,"Answer":"Just try out.\nvirtualenv venv\nIt should create a venv directory in same directory if python 3.x is being used.","Q_Score":0,"Tags":"python,python-3.x,django,python-2.7,virtualenv","A_Id":62463497,"CreationDate":"2020-06-18T20:52:00.000","Title":"error with installing virtualenv with python 3","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"ive updated to python3 and downloaded virtualenv using:\n sudo \/usr\/bin\/easy_install virtualenv\nwhen i go to start the virtualenv i got the following error message :\nvirtualenv project1\nTraceback (most recent call last):\n  File \"\/usr\/local\/bin\/virtualenv\", line 6, in <module>\n    from pkg_resources import load_entry_point\n  File \"\/System\/Library\/Frameworks\/Python.framework\/Versions\/2.7\/Extras\/lib\/python\/pkg_resources\/__init__.py\", line 3241, in <module>\n    @_call_aside\n  File \"\/System\/Library\/Frameworks\/Python.framework\/Versions\/2.7\/Extras\/lib\/python\/pkg_resources\/__init__.py\", line 3225, in _call_aside\n    f(*args, **kwargs)\n  File \"\/System\/Library\/Frameworks\/Python.framework\/Versions\/2.7\/Extras\/lib\/python\/pkg_resources\/__init__.py\", line 3254, in _initialize_master_working_set\n    working_set = WorkingSet._build_master()\n  File \"\/System\/Library\/Frameworks\/Python.framework\/Versions\/2.7\/Extras\/lib\/python\/pkg_resources\/__init__.py\", line 585, in _build_master\n    return cls._build_from_requirements(__requires__)\n  File \"\/System\/Library\/Frameworks\/Python.framework\/Versions\/2.7\/Extras\/lib\/python\/pkg_resources\/__init__.py\", line 598, in _build_from_requirements\n    dists = ws.resolve(reqs, Environment())\n  File \"\/System\/Library\/Frameworks\/Python.framework\/Versions\/2.7\/Extras\/lib\/python\/pkg_resources\/__init__.py\", line 786, in resolve\n    raise DistributionNotFound(req, requirers)\npkg_resources.DistributionNotFound: The 'zipp>=0.4' distribution was not found and is required by importlib-resources\ni looked around and realised the that 'zipp' had not been installed so i installed that also. when i went to run the virtualenv again i got the same error message again as above. and for some reason it keeps referencing python 2.7 even though ive upgraded to python3.","AnswerCount":4,"Available Count":3,"Score":0.0996679946,"is_accepted":false,"ViewCount":1488,"Q_Id":62459220,"Users Score":2,"Answer":"please try this ..\nyou just follow Exactly the bellow Items :\nOpen your Command Prompt AS ADMINISTRATOR -> right click on CMD and RUN AS ADMINISTRATOR\ngo to which Folder to you want to create your VirtualENV : For example : > Cd C:\\Users...\\Documents\\python\\src\ntype it : PIP install Virtualenv\nmake sure your internet connection is Ok\n4.type : python -m venv env\nand then you can create your project inside this env folder..\nall Comment code should be write in Command Prompt AS Administrator","Q_Score":0,"Tags":"python,python-3.x,django,python-2.7,virtualenv","A_Id":62463879,"CreationDate":"2020-06-18T20:52:00.000","Title":"error with installing virtualenv with python 3","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"ive updated to python3 and downloaded virtualenv using:\n sudo \/usr\/bin\/easy_install virtualenv\nwhen i go to start the virtualenv i got the following error message :\nvirtualenv project1\nTraceback (most recent call last):\n  File \"\/usr\/local\/bin\/virtualenv\", line 6, in <module>\n    from pkg_resources import load_entry_point\n  File \"\/System\/Library\/Frameworks\/Python.framework\/Versions\/2.7\/Extras\/lib\/python\/pkg_resources\/__init__.py\", line 3241, in <module>\n    @_call_aside\n  File \"\/System\/Library\/Frameworks\/Python.framework\/Versions\/2.7\/Extras\/lib\/python\/pkg_resources\/__init__.py\", line 3225, in _call_aside\n    f(*args, **kwargs)\n  File \"\/System\/Library\/Frameworks\/Python.framework\/Versions\/2.7\/Extras\/lib\/python\/pkg_resources\/__init__.py\", line 3254, in _initialize_master_working_set\n    working_set = WorkingSet._build_master()\n  File \"\/System\/Library\/Frameworks\/Python.framework\/Versions\/2.7\/Extras\/lib\/python\/pkg_resources\/__init__.py\", line 585, in _build_master\n    return cls._build_from_requirements(__requires__)\n  File \"\/System\/Library\/Frameworks\/Python.framework\/Versions\/2.7\/Extras\/lib\/python\/pkg_resources\/__init__.py\", line 598, in _build_from_requirements\n    dists = ws.resolve(reqs, Environment())\n  File \"\/System\/Library\/Frameworks\/Python.framework\/Versions\/2.7\/Extras\/lib\/python\/pkg_resources\/__init__.py\", line 786, in resolve\n    raise DistributionNotFound(req, requirers)\npkg_resources.DistributionNotFound: The 'zipp>=0.4' distribution was not found and is required by importlib-resources\ni looked around and realised the that 'zipp' had not been installed so i installed that also. when i went to run the virtualenv again i got the same error message again as above. and for some reason it keeps referencing python 2.7 even though ive upgraded to python3.","AnswerCount":4,"Available Count":3,"Score":0.0,"is_accepted":false,"ViewCount":1488,"Q_Id":62459220,"Users Score":0,"Answer":"i ended up using the built in python 3 venv package. it works just as well and it was straight forward and simple. thank you for all the help\nstart the virtual environment: python3 -m venv project1\nactivate the virtual environment: source project1\/bin\/activate\ndeactivate the virtual environment: deactivate","Q_Score":0,"Tags":"python,python-3.x,django,python-2.7,virtualenv","A_Id":62474626,"CreationDate":"2020-06-18T20:52:00.000","Title":"error with installing virtualenv with python 3","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I know that Python is platform independent, but I don't understand how that works for CPython. If the interpreter and some of the modules are written in C, aren't those going to be platform dependent?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":5091,"Q_Id":62459242,"Users Score":3,"Answer":"C is platform independent in the sense that it can be compiled for any machine for which a compiler is made to target that machine. That's why the Python source code is platform independent, even if a Python binary can only work on one platform.","Q_Score":1,"Tags":"python,c,cross-platform,platform-independence","A_Id":62459341,"CreationDate":"2020-06-18T20:53:00.000","Title":"How is Python platform independent?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I would to create new Python project which include pipenv for manage my packages.\nBut when I try to install package with it, it throw me I exception :\n\nValueError: Not a valid python path:\n'C:\/dev\/Anaconda3\/Scripts\/python.exe'\n\nI try pipenv command with 2 differents emulation terminal (Cmder and Terminus) which produce same result.\nIn old time a try Anaconda solutions for work with Python. But now I don't want use this and I uninstall Anaconda in my OS.\nIt seems that my OS keep old reference to this python executable into Anaconda in your PATH... But I display my 2 PATH variables OS (PATH system OS and PATH user) and nothing has this location path into your string.\nThe directory c:\\dev\\Anaconda3 doesn't exist !\nI try to search uninstall Anaconda program in my tool application manager Windows but Anaconda is not diplayed in that listing. It seems to be good uninstalled.\nI install correctly pipenv executable :  pipenv --version\n\npipenv, version 2020.6.2\n\nI install correctly python executable :  python --version\n\nPython 3.8.3\n\nI added 3 differents PATH python for my OS PATH (system PATH and user PATH) :\n\nC:\\dev\\python\\Python38\nC:\\dev\\python\\Python38\\Scripts\\\nC:\\dev\\python\\Python38\\Scripts\\bin\n\nWhy I keep old reference to Anaconda program ?\nWhy many program search python in same old deleted path and PATH variable do not included this ?\nHow pipenv created his PATH environment variable ?","AnswerCount":3,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":756,"Q_Id":62487033,"Users Score":0,"Answer":"You need to delete the old path in the Windows Registry.\n\nHit win + r\nregedit\nfind folders with (Anaconda3 or Miniconda3).\n\nProbably two folders. Do not delete folders with the new path to Python.","Q_Score":3,"Tags":"python,windows,anaconda,pipenv,cmder","A_Id":63356807,"CreationDate":"2020-06-20T14:21:00.000","Title":"pipenv search python in old directory do not exist","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I just finished my app and made a release version with buildozer and signed it but when I tried to upload my apk file to Google Play Console...It said that the API level of the app was 27 and it should be level 28. So how can I do this?\nThanks in advance","AnswerCount":2,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":340,"Q_Id":62493617,"Users Score":0,"Answer":"It should be edited in buildozer.spec file.\nIf you scroll down it's default to 27, change it to specification","Q_Score":0,"Tags":"python,android,python-3.x,kivy,buildozer","A_Id":62495552,"CreationDate":"2020-06-21T01:52:00.000","Title":"How to change API level when using buildozer?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I just finished my app and made a release version with buildozer and signed it but when I tried to upload my apk file to Google Play Console...It said that the API level of the app was 27 and it should be level 28. So how can I do this?\nThanks in advance","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":340,"Q_Id":62493617,"Users Score":0,"Answer":"Find the line that says android.api = 27 in your buildozer.spec file and change it to 28.","Q_Score":0,"Tags":"python,android,python-3.x,kivy,buildozer","A_Id":62494264,"CreationDate":"2020-06-21T01:52:00.000","Title":"How to change API level when using buildozer?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I'm making an app that collects such as time spent on application etc., and stores it in a folder, to make it neat I want create directories automatically with the date as the name of the directory and save file on that day to it.\nHow can I create folders daily automatically having name as the date","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":251,"Q_Id":62513534,"Users Score":0,"Answer":"You can use the os module to make a folder. And to make a folder everyday you can make a while loop and you can use the time module for it.\nAnd you can name it by saying -\ndate.today()\ninside the argument of the makedirs method\nHope it helped a bit :)","Q_Score":0,"Tags":"python,datetime,automation,directory","A_Id":62513634,"CreationDate":"2020-06-22T11:38:00.000","Title":"Create a folder automatically daily using python","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm making an app that collects such as time spent on application etc., and stores it in a folder, to make it neat I want create directories automatically with the date as the name of the directory and save file on that day to it.\nHow can I create folders daily automatically having name as the date","AnswerCount":2,"Available Count":2,"Score":0.1973753202,"is_accepted":false,"ViewCount":251,"Q_Id":62513534,"Users Score":2,"Answer":"Don't bother creating folders on certain times, just check if the required folder exists when you want to write the file into it. If it doesn't, create it right then and there.\nFormat the current date into the name of the folder.","Q_Score":0,"Tags":"python,datetime,automation,directory","A_Id":62514259,"CreationDate":"2020-06-22T11:38:00.000","Title":"Create a folder automatically daily using python","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I set up a systemctl service (Jupyter) as part of a bootstrap for a Hadoop cluster. After bootstrap actions are completed, Hadoop is installed. During that step a number of environment variables are set - and these are vital for my service, Jupyter. Problem is, Jupyter does not know these environment variables, as it is started earlier in the process.\nMy question: how can I reload environment variables for my user? At the moment the user is running Jupyter, all env variables are known - I just need them loaded into the Python interpreter.\nThis fails inside notebook: os.environ['JAVA_HOME'] but works fine in the interpreter (because JAVA_HOME was defined after Jupyter was started).","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":3718,"Q_Id":62514598,"Users Score":1,"Answer":"Environment variables are local to a process when it starts and inherited from the parent process I think you are not going to be able to set them from outside that process. You can set them in that process but you would need to establish some way to pass them in. (example put in file and have something on a thread periodically read and set them local to that process)","Q_Score":3,"Tags":"python,linux,jupyter-notebook","A_Id":62520726,"CreationDate":"2020-06-22T12:35:00.000","Title":"How to reload environment variables in Python?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am a newbie to python. I have just installed Python and Pip.\nI need to install some packages for a personal project.\nI created a virtual environment using $ pipenv shell.\nI then ran $ pipenv install dlib.\nBut I received the following error:\nError text:\nPython path configuration:\n  PYTHONHOME = (not set)\n  PYTHONPATH = (not set)\n  program name = 'C:\\Users\\samya\\.virtualenvs\\py_img_recog-DAsXOW1h\\Scripts\\python.exe'\n  isolated = 0\n  environment = 1\n  user site = 1\n  import site = 1\n  sys._base_executable = 'C:\\\\Users\\\\samya\\\\.virtualenvs\\\\py_img_recog-DAsXOW1h\\\\Scripts\\\\python.exe'\n  sys.base_prefix = ''\n  sys.base_exec_prefix = ''\n  sys.executable = 'C:\\\\Users\\\\samya\\\\.virtualenvs\\\\py_img_recog-DAsXOW1h\\\\Scripts\\\\python.exe'\n  sys.prefix = ''\n  sys.exec_prefix = ''\n  sys.path = [\n    'C:\\\\Users\\\\samya\\\\.virtualenvs\\\\py_img_recog-DAsXOW1h\\\\Scripts\\\\python38.zip',\n    '.\\\\DLLs',\n    '.\\\\lib',\n    'c:\\\\users\\\\samya\\\\appdata\\\\local\\\\programs\\\\python\\\\python38-32',\n  ]\nFatal Python error: init_fs_encoding: failed to get the Python codec of the filesystem encoding\nPython runtime state: core initialized\nModuleNotFoundError: No module named 'encodings'\n\nCurrent thread 0x000042ec (most recent call first):\n<no Python frame>\n[   =] Installing dlib...\nInstallation Failed \n\nI am running Python 3.8.3 and Pip 20.1.1 on Windows 10 x64 bit system.\nThanks for your help in advance!","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":1994,"Q_Id":62532922,"Users Score":0,"Answer":"this means your pip command path is not set in the path variables of system\nYou can try doing the following:\n\ngo to This Pc>properties>Advanced Settings>environment variables\n\n..then click new\n\n..then select the path where your python pip command is available\n\n.. and simply give it a name python38 thats it\n\nthen it will create your venv","Q_Score":0,"Tags":"python,python-3.x,pip","A_Id":62533132,"CreationDate":"2020-06-23T10:43:00.000","Title":"pipenv can't install packages and throws an error","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I've developed a game in python using Pygame. So far bundling it using pyinstaller has caused me zero issues when bundling it and running it on a different machine. Steam can install the game, and navigating to its local directory and launching the .exe will allow the game to run but anytime I attempt to run it through the steam launcher it tells me files are missing, even though I know they're in the local install directory.\nAny ideas on what may be causing such an issue?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":417,"Q_Id":62545080,"Users Score":0,"Answer":"So after taking user Kingsleys advice and using \"os.getcwd()\" to see where exactly Steam was launching the game from I noticed it was treating the directory 1-up from the location of the .exe as the actual working directory. To resolve this problem all I had to do was change my package layout so that my assets were stored in this folder.\nNo longer facing an issues with this.","Q_Score":0,"Tags":"python,pygame,pyinstaller,steam,file-not-found","A_Id":62633430,"CreationDate":"2020-06-23T23:04:00.000","Title":"Developed game in Python - Steam installs and can run locally but the game crashes when launched from Steam directly","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Currently, I have been scouring the internet for a code that will either add this program (something.exe) to the windows task scheduler or if that is not even an option how to add it to the windows reg key for a startup. I cannot find anything in terms of Python3, and I really hope it is not an answer that is right in front of my face. Thanks!","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":41,"Q_Id":62568162,"Users Score":0,"Answer":"Open the windows scheduler -> select \"create basic task\" -> fill out the desired times -> input the path to the script you want to execute.","Q_Score":0,"Tags":"python,windows,scheduled-tasks","A_Id":62568265,"CreationDate":"2020-06-25T05:00:00.000","Title":"Is there a python code that I can add to my program that will add it to start in windows 10?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to use sunnyportal-py. Relatively new to python, I do not understand step 2 in the README:\nHow to run\n\nClone or download the repository.\nEnter the directory and run:\nPYTHONPATH=. .\/bin\/sunnyportal2pvoutput --dry-run sunnyportal.config\nEnter the requested information and verify that the script is able to connect to Sunny Portal.\nThe information is saved in sunnyportal.config and can be edited\/deleted if you misstype anything.\nOnce it works, replace --dry-run with e.g. --output to upload the last seven days output data to pvoutput or --status to upload data for the current day.\nAdd --quiet to silence the output.\n\nCould anyone help me? I have gone into a cmd.exe in the folder I have downloaded, I don't know how to correctly write the python path in the correct location. What should I paste into the command line? Thanks!\nEdit : I would like to be able to do this on Windows, do tell me if this is possible.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":144,"Q_Id":62568970,"Users Score":0,"Answer":"The command at bullet 2 is to be typed at the commandline (You need to be in windows: cmd or powershell, Linux: bash, etc.. to be able to do this).\n\nPYTHONPATH=. .\/bin\/sunnyportal2pvoutput --dry-run sunnyportal.config\n\nThe first part of the command code above indicates where your program is located. Go to the specific folder via commandline (windows: cd:... ; where .. is your foldername) and type the command.\nThe second part is the command to be executed. Its behind the \"--\" dashes. The program knows what to do. In this case:\n\n--dry-run sunnyportal.config\n\nrunning a validation\/config file to see if the program code itself works; as indicated by \"dry run\".\nIn your case type at the location (while in cmd):\n\n\"sunnyportal2pvoutput --dry-run sunnyportal.config\"\n\nor\n\n\"sunnyportal2pvoutput.py --dry-run sunnyportal.config\" (without the environment variables (python path) set).\n\nNote: the pythonpath is an environment variable. This can be added via: Control Panel\\All Control Panel Items\\System\\ --> bullet Advanced System Settings --> button \"environment variables\". Then you can select to add it to \"Variables for user \"username\"\" or \"system variables\". Remember to reboot thereafter to make the change effective immediately.\nUpdate 1 (pip install sunnyportal):\n\ngo to cmd.\ntype \"pip search sunnyportal\"\n\nResult:\n\nMicrosoft Windows [Version 10.0.18363.836] (c) 2019 Microsoft\nCorporation. All rights reserved.\nC:\\Windows\\System32>pip search\nsunnyportal\nsunnyportal-py (0.0.4)  - A Python client for SMA sunny portal\nC:\\Windows\\System32>\n\nIf found, then type:\n\"pip install sunnyportal\"","Q_Score":0,"Tags":"python,python-3.x","A_Id":62569393,"CreationDate":"2020-06-25T06:15:00.000","Title":"How do I run a downloaded repository's config in Python?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to run a contionus azure webjob for python.\ni have 6 files where main.py is the main file, other files internally importing each other and finally everything is being called from main.py, now when i am trying to run only the first python file is getting executed, but i want that when the webjob will start only main.py will be executed not anything else. how to achieve that ?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":81,"Q_Id":62571480,"Users Score":1,"Answer":"This is quite simple. In azure webjob, if the file name starts with run, then this file has the highest priority to execute.\nSo the most easiest way is just renaming the main.py to run.py.\nOr add an run.py, then call the main.py within it.","Q_Score":2,"Tags":"python,azure,azure-webjobs","A_Id":62587173,"CreationDate":"2020-06-25T08:51:00.000","Title":"Run one file among multiple files in azure webjobs","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a query with respect to using external libraries like delta-core over AWS EMR notebooks. Currently there isn\u2019t any mechanism of installing the delta-core libraries through pypi packages. The available options include.\n\nLaunching out pyspark kernel with --packages option\nThe other option is to change the packages option in the python script through os configuration, but I don\u2019t see that it is able to download the packages and I still get import error on import delta.tables library.\nThird option is to download the JARs manually but it appears that there isn\u2019t any option on EMR notebooks.\n\nHas anyone tried this out before?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":516,"Q_Id":62574687,"Users Score":0,"Answer":"You can download the jars while creating EMR using bootstrap scripts.\nYou can place the jars in s3 and pass it to pyspark with --jars option","Q_Score":0,"Tags":"python,amazon-web-services,amazon-emr","A_Id":62586305,"CreationDate":"2020-06-25T11:52:00.000","Title":"Accessing delta lake through Pyspark on EMR notebooks","Data Science and Machine Learning":1,"Database and SQL":1,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"We are ingesting data in Janusgraph on Kubernetes(GCP) using python. We are doing multithreading, node chaining, indexing but still we are able to ingest only 100k (Nodes) records in 60 minutes from bigquery.\nKubernetes spec - 1 Pod with 25 vCPUs and 150 GiB RAM\nids.block-size = 10 million\nthread pool - 16\nnode pool - 16\nheap size - 4 gb\nQuestions:\n\nAny more approach we can take to increase the ingestion performance, reducing the overall time.\n\nHow many multiple connections at a time we can create with Janusgraph via Python Driver. Currently we are able to create 30 threads(connections) but when we increase the number of threads the connection either stuck or performance goes down.\n\n\nAny details\/help will be highly appreciated\nGremlin Query: g.V().hasLabel(\"http:\/\/purl.uniprot.org\/core\/Helix_Annotation\").has(\"id\", \"http:\/\/purl.uniprot.org\/uniprot\/P06931#SIPC5C5063B7561AB45\").has(\"node_id\", \"http:\/\/purl.uniprot.org\/uniprot\/P06931#SIPC5C5063B7561AB45\").has(\"rdf_type\", \"http:\/\/purl.uniprot.org\/uniprot\/\").has(\"http:\/\/purl.uniprot.org\/core\/range\", \"http:\/\/purl.uniprot.org\/range\/22571007582875950tt125tt127\").fold().coalesce(unfold(), addV(\"http:\/\/purl.uniprot.org\/core\/Helix_Annotation\").property(\"id\", \"http:\/\/purl.uniprot.org\/uniprot\/P06931#SIPC5C5063B7561AB45\").property(\"node_id\", \"http:\/\/purl.uniprot.org\/uniprot\/P06931#SIPC5C5063B7561AB45\").property(\"rdf_type\", \"http:\/\/purl.uniprot.org\/uniprot\/\").property(\"http:\/\/purl.uniprot.org\/core\/range\", \"http:\/\/purl.uniprot.org\/range\/22571007582875950tt125tt127\")).V().hasLabel(\"http:\/\/www.w3.org\/1999\/02\/22-rdf-syntax-ns#Statement\").has(\"id\", \"http:\/\/purl.uniprot.org\/uniprot\/#_kb.P06931_up.annotation_FA85AD309172A9A7\").has(\"node_id\", \"http:\/\/purl.uniprot.org\/uniprot\/#_kb.P06931_up.annotation_FA85AD309172A9A7\").has(\"rdf_type\", \"http:\/\/purl.uniprot.org\/uniprot\/\").has(\"http:\/\/purl.uniprot.org\/core\/attribution\", \"http:\/\/purl.uniprot.org\/uniprot\/P06931#attribution-AE0E09C5B47CC2714C9061D3806995B4\").fold().coalesce(unfold(), addV(\"http:\/\/www.w3.org\/1999\/02\/22-rdf-syntax-ns#Statement\").property(\"id\", \"http:\/\/purl.uniprot.org\/uniprot\/#_kb.P06931_up.annotation_FA85AD309172A9A7\").property(\"node_id\", \"http:\/\/purl.uniprot.org\/uniprot\/#_kb.P06931_up.annotation_FA85AD309172A9A7\").property(\"rdf_type\", \"http:\/\/purl.uniprot.org\/uniprot\/\").property(\"http:\/\/purl.uniprot.org\/core\/attribution\", \"http:\/\/purl.uniprot.org\/uniprot\/P06931#attribution-AE0E09C5B47CC2714C9061D3806995B4\"))","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":80,"Q_Id":62587526,"Users Score":0,"Answer":"Have you tried using groovy scripts? I was able to insert ~5K nodes in ~10 sec single threaded into a janusgraph that has much lesser RAM and CPU.","Q_Score":4,"Tags":"google-cloud-platform,gremlin,janusgraph,gremlinpython,knowledge-graph","A_Id":62702269,"CreationDate":"2020-06-26T03:21:00.000","Title":"JanusGraph Data Ingestion atscale","Data Science and Machine Learning":1,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Python 3.8.3, Scrapy 2.2.0 and Twisted-20.3.0-cp38-cp38-win_amd64.whl are installed on my computer. Everything works as expected.\nI can\u2019t install Scrapy without Twisted, so Twisted is also installed, but when I try to transfer the application to Heroku, an error appears. How do I use Scrapy on Heroku?\n-----> Found python-3.6.10, removing\n-----> Requirements file has been changed, clearing cached dependencies\n-----> Installing python-3.8.3\n-----> Installing pip\n-----> Installing SQLite3\n-----> Installing requirements with pip\n       ERROR: Twisted-20.3.0-cp38-cp38-win_amd64.whl is not a supported wheel on this platform.\n !     Push rejected, failed to compile Python app.\n !     Push failed```","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":922,"Q_Id":62594645,"Users Score":0,"Answer":"Remove Twisted-20.3.0-cp38-cp38-win_amd64.whl in your requirement.txt\nI don't think it's required because while installing scrapy it will be taken care of","Q_Score":0,"Tags":"python,heroku,twisted","A_Id":63981172,"CreationDate":"2020-06-26T12:20:00.000","Title":"ERROR: Twisted-20.3.0-cp38-cp38-win_amd64.whl is not a supported wheel on this platform","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"Basically title, is there anything like this? I googled around a bit but couldn't find anything relevant to Linux only... win32gui postcommand is what I'm looking for an equivalent on Linux","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":172,"Q_Id":62595917,"Users Score":0,"Answer":"The module python-libxdo should be able to achieve what you wanted to do.\nIn particular, you can hardcode window id.","Q_Score":0,"Tags":"python-3.x,linux","A_Id":62607514,"CreationDate":"2020-06-26T13:34:00.000","Title":"Is there a python module in linux similar to win32gui for sending input to inactive windows","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"The key strike work. Menu drops down. Shows nothing. Maybe files. This continue in all projects.\nIt also high-lights imports as if it\u2019s not there. But the project operates just the same.\nI don\u2019t know is this is a root\/path issue.\nShowed others and asked around and No One has any ideas. This has been hurting my productivity and learning. Tried uninstalling and reinstalling through Brew. Problem persists.","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":39,"Q_Id":62609872,"Users Score":1,"Answer":"Uh, have you tried Ctrl+Shift+P ?","Q_Score":0,"Tags":"python,django,macos,visual-studio-code,macos-catalina","A_Id":62609947,"CreationDate":"2020-06-27T12:12:00.000","Title":"Why does the Vscode command pallet does not work","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'd like to run Ansible tasks with python3 as the interpreter (there are lots of reasons for why to go to python3 ... one of them being that python2 will not be supported anymore by Ansible).\nUnfortunately, doing that on RedHat 7 is not possible as I can't install python3-dnf there (it seems this package is available only for RedHat 8).\nDoes anyone had that issue and founded a solution for it?\nThanks","AnswerCount":3,"Available Count":1,"Score":0.0665680765,"is_accepted":false,"ViewCount":6162,"Q_Id":62634946,"Users Score":1,"Answer":"I'm one if the Ansible maintainers for the yum and dnf modules. Python 2 will continue to be supported for the remote hosts (hosts in the inventory that you are automating tasks on) but not the controller node (where your are actually running the ansible-playbook command). You can safely continue to use Python 2 on the remote RHEL7 hosts so long as you are running Ansible from a control node that's on Python 3, and even that restriction doesn't exist for the current stable release of Ansible (2.9.10 at the time of this writing) but only for future releases. Hope this helps, happy automating!","Q_Score":3,"Tags":"python,ansible,redhat","A_Id":62650360,"CreationDate":"2020-06-29T09:16:00.000","Title":"Ansible with Python3 on RedHat\/CentOS 7 (python3-dnf issues)","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I wrote a Python script that allows me to retrieve calendar events from an externally connected source and insert them into my Google Calendar thanks to the Google Calendar's API. It works locally when I execute the script from my command line, but I would like to make it happen automatically so that the externally added events pop up in my Google Calendar automatically.\nIt appears that a cron job is the best way to do this, and given I used Google Calendar's API, I thought it might be helpful to use Cloud Functions with Cloud Scheduler in order to make it happen. However, I really don't know where to start and if this is even possible because accessing the API requires OAuth with Google to my personal Google account which is something I don't think a service account (which I think I need) can do on my behalf.\nWhat are the steps I need to take in order to allow the script which I manually run and authenticates me with Google Calendar run every 60 seconds ideally in the cloud so that I don't need to have my computer on at all times?\nThings I\u2019ve tried to do:\nI created a service account with full permissions and tried to create an http-trigger event that would theoretically run the script when the created URL is hit. However, it just returns an HTTP 500 Error.\nI tried doing Pub\/Sub event targets to listen and execute the script, but that doesn\u2019t work either.\nSomething I\u2019m confused about:\nwith either account, there needs to be a credentials.json file in order to login; how does this file get \u201cdeployed\u201d alongside the main function? Along with the token.pickle file that gets created when the authentication happens for the first time.","AnswerCount":1,"Available Count":1,"Score":0.3799489623,"is_accepted":false,"ViewCount":391,"Q_Id":62648913,"Users Score":2,"Answer":"The way a service account works is that it needs to be preauthorized.  You would take the service account email address and share a calendar with it like you would with any other user.  The catch here being that you should only be doing this with calendars you the developer control.  If these are calendars owned by others you shouldnt be using a service account.\nThe way Oauth2 works is that a user is displayed a consent screen to grant your application access to their data.  Once the user has granted you access and assuming you requested offline access you should have a refresh token for that users account.  Using the refresh token you can request a new access token at anytime.  So the trick here would be storing the users refresh tokens in a place that your script can access it then when the cron job runs the first thing it needs to do is request a new access token using its refresh token.\nSo the only way you will be able to do this as a cron job is if you have a refresh token stored for the account you want to access. Other wise it will require it to open a web browser to request the users consent and you cant do that with a cron job.","Q_Score":0,"Tags":"python,google-cloud-functions,google-calendar-api,google-oauth,google-cloud-scheduler","A_Id":62652102,"CreationDate":"2020-06-30T01:16:00.000","Title":"How do I use a cron job in order to insert events into google calendar?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"os.system(r'cmd \/c \"for \/f %a in ('dir \/b \"C:\\Users\\file\\\"') do ren \"%a\" \"DRAWING_%a\"\")\nIt was throwing an error at dir \/b as invalid syntax.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":41,"Q_Id":62669455,"Users Score":0,"Answer":"I got solution and solution is\nos.system(r'cmd \/c \"FOR \/r \"D:\\BACKUPS\\2018\\\" %a in (*) DO REN \"%~a\" \"Drawing_%~nxa\"\"')","Q_Score":0,"Tags":"python,windows,command","A_Id":63407998,"CreationDate":"2020-07-01T03:57:00.000","Title":"I use the command in (dir \/b) batch files but it is throwing an error invalid syntax","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I've scheduled a Cron job like below but it is not executing. Do I need to put command before or is it ok to write only path.\n\nWith Command in the cronjob: 0 4 * * 1 python \/app\/www\/html\/RegionSubregion\/ceeinca.py\nWithout command in the cronjob: 0 4 * * 1 \/app\/www\/html\/RegionSubregion\/ceeinca.py\n\nWhich one is correct here?\nI need to run this particular python script on 1st day (Monday) of everyweek at 4AM. Please guide. Thank you.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":79,"Q_Id":62677624,"Users Score":0,"Answer":"Option 1 works if you give execute permission to the file.\nExecute Permission: chmod +x \/app\/www\/html\/RegionSubregion\/ceeinca.py","Q_Score":0,"Tags":"python,linux,cron","A_Id":62709173,"CreationDate":"2020-07-01T13:10:00.000","Title":"How to schedule Cron Job in Linux","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I've just installed Windows Server 2019 on Google Cloud Compute Engine, so I can host my python apps 24\/7 but I can't install python because of this error:\n0x80070659 - This installation is forbidden by system policy. Contact your system administrator.\nI was wondering if there's anything I can do to resolve this issue.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":503,"Q_Id":62678168,"Users Score":2,"Answer":"Solution:\nI just needed to run the setup file as administrator.","Q_Score":1,"Tags":"python","A_Id":62679415,"CreationDate":"2020-07-01T13:38:00.000","Title":"Using python on a Google Cloud Windows Server","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Attempting to run a python 2.7 app engine app locally using PyCharm (which uses dev_appserver) my machine is python 3.7 but I have a python 2.7 virtual env setup as the project interpreter, which works fine when running the project.\nHowever when attempting to debug the same run config (which runs fine) I am getting the following error\nERROR: (dev_appserver) python2: command not found\nI can run the python2 command in my terminal both inside and outside the virtual environment so I am not sure what is wrong here.\nI am currently running Pop!_OS 20.04 LTS if that helps.","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":224,"Q_Id":62680759,"Users Score":0,"Answer":"I had the same issue after starting new AppEngine projects on python 3. Initially, I thought the problem was with a new version of Google Cloud SDK. I spent a lot of time linking\/unlinking python versions and playing around the environment variables.\nBut eventually, update of PyCharm to 2021.1.2 fixed the issue.","Q_Score":1,"Tags":"python,google-app-engine,pycharm,dev-appserver","A_Id":68097544,"CreationDate":"2020-07-01T15:58:00.000","Title":"Unable to Debug Dev Appserver using pycharm, but able to run fine","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":1},{"Question":"I can't seem to force quit Anaconda-Navigator. It is apparently running on my Mac but when i try to force quit it nothing happens, and when i try to launch it also nothing happens. Any help is welcomed.","AnswerCount":1,"Available Count":1,"Score":0.3799489623,"is_accepted":false,"ViewCount":3088,"Q_Id":62681829,"Users Score":2,"Answer":"This problem only occurs when you first close the terminals and then 'Anaconda'. Do following steps:\n\nRestart your Mac.\nIt won't happen again if you always close the 'Anaconda' first and then the Terminals (The two small windows).\n\nHope it was helpful!","Q_Score":4,"Tags":"python,anaconda,anaconda3","A_Id":64726681,"CreationDate":"2020-07-01T17:00:00.000","Title":"Anaconda won't force quit in Mac","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am developing a text with Python and Qt that can be used by blind and visually impaired people.\nThe text editor should be suitable for screen readers.\nI do tests with the screen readers NVDA (Windows) and\nOrca (Ubuntu).\nTexts for screen readers should actually be saved in the \"AccessibleDescription\" property. The NVDA screen reader does not read the \"AccessibleDescription\" property. AccessibleName property only. The Orca screen reader reads the \"AccessibleDescription\" property.\nQuestion:\nWhat can I do so that my application is screen-readable on all operating systems?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":295,"Q_Id":62682288,"Users Score":0,"Answer":"Short answer\nSadly, there's probably no magic solution here.\nThe only reasonnable answer is just trying and testing a maximum of different combinations of OS, screen readers, GUI toolkits and components, as much as you can. That's the only way to discover what works well for your particular scope, and what doesn't.\nThere is no uniformity at all between OS, screen readers and GUI toolkits, and probably no combination working everywhere in all cases.\nLonger answer\nThis isn't a peasure to give this answer but in fact, if you want to make sure your app is 100% screen reader accessible, your only way is basicly to stop using GUI toolkits and exclusively use the native components offered by the OS for which accessibility is well documented; and therefore of course develop as many different apps as OS you intent to support.\nAs soon as you are using a GUI toolkit, you are adding a layer, and may lose some accessibility (and often more than less) in the process.\nThe gap between the features offered by the native OS components and those proposed in the toolkit is often closed by emulation, and some of the emulations aren't made accessible, or simply can't be made accessible for various (more or less excusable) reasons.\nThat's why some components are accessible while some others aren't; why a given component can be accessible under one OS but not at all under another; and why a component can be accessible in version N of the toolkit but not the same component in version N+1.\nIn short, you have understood, accessibility is extremely fragile.\nSadly, GUI toolkits rarely well document accessibility of their components under the different OS they support.\nThat's really a shame. It has to be addressed.\nAdditionally, accessibility is often presented as being  expert compicated features. It shouldn't be so. It should be easy for app developers to make accessible apps.\nSo, wwell, since there is often no documentation about accessibility, your only way is to try and test.\nThat's a lot of work, and there is no alternative. Try and test. That's all.\nDigging deeper\nThere's generally two foundamental ways to design a GUI toolkit, and depending on which has been chosen, this has a dramatic impact on natural accessibility, and what kind of accessibility the toolkit can hope to achieve.\n\nThe first way is to start from a blank page as far as the OS permits, and from there, decide literally everything: what components to provide, and how they should look and behave.\nBy doing so, you make sure that your app will look and behave exactly the same everywhere. An user might be surprised or confused the first time because look and behavior is often not 100% conform to OS conventions or user preferences, but in the long run, he\/she will always feel at home with your app regardless of the OS used.\nHowever, more importantly, create everything from a blank page also means that everything must be defined from scratch for accessibility. It requires of course a lot of work, whether for the GUI implementers, or the app developer. Different toolkits place the responsibility cursor at different places.\nSome toolkits perform better and\/or go further than others, but in general they are nowhere near what the native components of the OS can provide.\nThe second way is to use as much as possible the components proposed by the OS, and emulate only missing features when they are really needed.\nThis is excellent for accessibility, since almost all native OS components are naturally accessible or only require little effort. Users will have an app that conforms to the general look of their OS, and so won't be confused or surprised by the interface and its behavior.\nHowever, the app isn't going to look exactly the same in all computers. Sadly, for many designers and developers, this is a definitive stopper.\n\nAs the vaste majority of GUI toolkits I know of, QT is part of the first group, but isn't playing that bad in accessibility (at least under windows) if the app developer is also aware of accessibility.\nIn the second group, you have WXWidgets for example.","Q_Score":0,"Tags":"python,qt,accessibility,screen-readers","A_Id":62684147,"CreationDate":"2020-07-01T17:30:00.000","Title":"how can ensure that a Python qt application is screen readable on all operating systems","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":1,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am looking to execute shell command from node.js. I would like the stdout to be displayed to the terminal. In python I can do this with subprocess.run. In node.js I see child_process.exec, but this returns a buffer of stdout instead of automatically displaying to the terminal.","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":487,"Q_Id":62683008,"Users Score":1,"Answer":"In my case I got it working using child_process.execAsync with the stdio option set  to inherit like this:\nchild_process.execAsync(\"git push --tags\", { stdio: \"inherit\" })\nI needed git to show the prompt for the passphrase and allow user to make the input.","Q_Score":4,"Tags":"python,node.js,terminal,subprocess,child-process","A_Id":66892397,"CreationDate":"2020-07-01T18:15:00.000","Title":"Is there a Node.js equivalent to Python's subprocess.run?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I uploaded my project folder to GitHub so I can work on it from both my desktop and my laptop.\nI did some work on the project on my laptop and pushed the latest commit to GitHub and hopped on my desktop to see if it worked.\nI accidentally cloned the repository to the wrong location, but when I went to delete it to clone it to the right folder, I got a pop-up saying that I \"need permission to perform this action. [I] require permission from <laptop user account> to make changes to this folder\".\nI'm kind of stumped.\nI tried taking control of the folder through Properties, but that hasn't seemed to change anything.","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":2247,"Q_Id":62688781,"Users Score":0,"Answer":"It depends on your OS, but:\n\na repository cloned into a wrong folder can simply be moved to the right folder (no need to re-clone)\nif that is not possible (no move or deletion), you can as a workaround leave it there, and re-clone it to the right directory\n\n\nI was able to delete the folder by deleting the files inside and working my way up\n\nIt is possible another process kept an handle on the folder itself, which would prevent its deletion.","Q_Score":1,"Tags":"python,git,permissions,administrator","A_Id":62688827,"CreationDate":"2020-07-02T04:00:00.000","Title":"Can't delete cloned git repo on my computer?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I uploaded my project folder to GitHub so I can work on it from both my desktop and my laptop.\nI did some work on the project on my laptop and pushed the latest commit to GitHub and hopped on my desktop to see if it worked.\nI accidentally cloned the repository to the wrong location, but when I went to delete it to clone it to the right folder, I got a pop-up saying that I \"need permission to perform this action. [I] require permission from <laptop user account> to make changes to this folder\".\nI'm kind of stumped.\nI tried taking control of the folder through Properties, but that hasn't seemed to change anything.","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":2247,"Q_Id":62688781,"Users Score":0,"Answer":"If you cloned it in the wrong directory, try moving it to the right directory.\nIf you finished working with it and wish to delete it, then:\nGoto properties>security>edit permissions and give full control to your user account and then try deleting it, if that doesn't work, check if that directory is open in any other program(my directory was open in vscode), then try deleting it should work.","Q_Score":1,"Tags":"python,git,permissions,administrator","A_Id":63426381,"CreationDate":"2020-07-02T04:00:00.000","Title":"Can't delete cloned git repo on my computer?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am using dataflow to read files from GCS bucket and do some transformations on it. I am using beam.io.ReadFromText() method for that.\nWhat is the best way to mark the files that are already read, so that same file will not repeatedly read by dataflow ?","AnswerCount":2,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":761,"Q_Id":62692416,"Users Score":1,"Answer":"A Dataflow job using beam.io.ReadFromText will read each file that matches the given pattern exactly once.  I assume from your question you're trying to run a pipeline multiple times and only read files that showed up in the GCS bucket since the last run? In that case, you have two options.\n(1) Use apache_beam.io.textio.ReadFromTextWithFilename and then record the set of filenames that you already read somewhere (e.g. write them to a text file) that you consult when constructing the set of files to read on your next run, or\n(2) Use apache_beam.io.textio.ReadAllFromText to read from a PCollection of filenames, which is computed to be the set of things that exist in your bucket (e.g. using apache_beam.io.fileio.MatchFiles) but were not read in any previous run (recorded as in (1) via a separate output file in GCS).\nIt might be worth considering if a streaming pipeline would better meet your needs.","Q_Score":1,"Tags":"python,etl,google-cloud-dataflow,apache-beam,windowing","A_Id":62704294,"CreationDate":"2020-07-02T08:43:00.000","Title":"How to mark read files in dataflow?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a multi-threaded application, each thread receives data from a serial\/UART interface.\nI want to print the data in order as they have arrived, however some data is longer, some is shorter and using read_until of pyserial leads to the order being mixed up (by few milliseconds\/nanoseconds)\nI would need something like a Queue but one that removes elements in sequential order to ensure I won't mix them up.\nReceiving thread\n\nUpon receiving a 1st byte of a packet I can \"get a next number\" (some thread-safe operation)\nThen I can wait until all the data arrive\nThen I can push the whole \"packet\" into the queue\n\nConsumer thread  can only consume elements in the queue based on the sequential index, if eg. 1 and 2 were processed and there are 4 and 5 waiting already but I never got 3 I have to wait for it before moving on.\nI do not want to reinvent the wheel - is this a construct I fail to name or does anybody know anything similar?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":56,"Q_Id":62693010,"Users Score":0,"Answer":"As I know there is no such structure (similar to \"ordered priority queue\") in python standard library. And most likely you will have to implement something like a wrapper over PriorityQueue that keeps track priority of items, allows to extract only in an ordered manner, and buffers the rest.","Q_Score":0,"Tags":"python,python-3.x,multithreading,queue","A_Id":62694043,"CreationDate":"2020-07-02T09:18:00.000","Title":"Indexed\/ordered queue?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have been working with ML Studio (classic) and facing a problem with \"Execute Python\" scripts. I have noticed that it takes additional time to perform some internal tasks after which it starts executing the actual Python code in ML Studio. This delay has caused an increased time of 40-60 seconds per module which is aggregating and causing a delay of 400-500 seconds per execution when consumed through Batch Execution System or on running the experiments manually. (I've multiple Modules of \"Execute Python\" scripts)\nFor instance - If I run a code in my local system, suppose it takes 2-3 seconds. The same would consume 50-60 seconds in Azure ML Studio.\nCan you please help understand the reason behind this or any optimization that can be done?\nRegards,\nAnant","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":153,"Q_Id":62696966,"Users Score":2,"Answer":"The known limitations of Machine Learning Studio (classic) are:\nThe Python runtime is sandboxed and does not allow access to the network or to the local file system in a persistent manner.\nAll files saved locally are isolated and deleted once the module finishes. The Python code cannot access most directories on the machine it runs on, the exception being the current directory and its subdirectories.\nWhen you provide a zipped file as a resource, the files are copied from your workspace to the experiment execution space, unpacked, and then used. Copying and unpacking resources can consume memory.\nThe module can output a single data frame. It's not possible to return arbitrary Python objects such as trained models directly back to the Studio (classic) runtime. However, you can write objects to storage or to the workspace. Another option is to use pickle to serialize multiple objects into a byte array and then return the array inside a data frame.\nHope this helps!","Q_Score":2,"Tags":"python-3.x,azure,azure-machine-learning-studio,azure-machine-learning-service","A_Id":62697100,"CreationDate":"2020-07-02T13:00:00.000","Title":"Why does Azure ML Studio (classic) take additional time to execute Python Scripts?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"First, sorry if my question is not clear or is too simple, but I'm getting confuse about it. I have an EC2 instance where I want to run some python code previously developed in my computer. I want to automatically install all the packages that the python script use instead of doing pip in my EC2 instance for every package. I don't know if I need to use Docker, create a repository in GitHub and then clone it from my EC2 instance, or there is another alternative.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":417,"Q_Id":62700635,"Users Score":2,"Answer":"You have a few options to go about it.\n\nSetup bootstrap to install your packages when you stand up a new EC2 instance.\ncreate EC2 instance from image, using docker or with aws AMI.\n\nThis will setup an EC2 instance with all the dependency packages ready.","Q_Score":0,"Tags":"python,amazon-web-services,github,amazon-ec2","A_Id":62700715,"CreationDate":"2020-07-02T16:07:00.000","Title":"Automatically install python modules in EC2","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying install the Python Extension for VSCode for all users of a machine, but it is getting installed for only the current user. Can anyone help me on this.\nThanks","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":156,"Q_Id":62702707,"Users Score":0,"Answer":"Issue has been resolved after saving the path \"C:\\Users<userProfile>.vscode\\extensions\"  using the our Profile management tool. the data related to the extensions is stored in above mentioned path. so after saving the path users were able to add the extensions.","Q_Score":0,"Tags":"python,visual-studio-code","A_Id":63701266,"CreationDate":"2020-07-02T18:19:00.000","Title":"How to install Python Extension in VScode for all users of a machine","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have successfully installed opencv 4.3.0 on my Mac OS Catalina, python 3.8 is installed also, but when I try to import cv2, I get the Module not found error.\nPlease how do I fix this?\nthanks in advance.","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":436,"Q_Id":62704317,"Users Score":0,"Answer":"I was having issue with installing opencv in my Macbook - python version 3.6 ( i downgraded it for TF 2.0) and MacOs Mojave 10.14. Brew , conda and pip - none of the three seemed to work for me. So i went to [https:\/\/pypi.org\/project\/opencv-python\/#files] and downloaded the .whl that was suitable for my combo of python and MacOs versions. Post this navigated to the folder where it was downloaded and executed pip install .\/opencv_python-4.3.0.36-cp36-cp36m-macosx_10_9_x86_64.whl","Q_Score":2,"Tags":"python,python-3.x","A_Id":63223602,"CreationDate":"2020-07-02T20:11:00.000","Title":"installing Opencv on Mac Catalina","Data Science and Machine Learning":1,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have successfully installed opencv 4.3.0 on my Mac OS Catalina, python 3.8 is installed also, but when I try to import cv2, I get the Module not found error.\nPlease how do I fix this?\nthanks in advance.","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":436,"Q_Id":62704317,"Users Score":0,"Answer":"Can you try pip install opencv-python?","Q_Score":2,"Tags":"python,python-3.x","A_Id":62707394,"CreationDate":"2020-07-02T20:11:00.000","Title":"installing Opencv on Mac Catalina","Data Science and Machine Learning":1,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to write Python3 code with Gtk3, in SLES11 linux machine\nI get this error:\n\nD-Bus library appears to be incorrectly set up; failed to read machine\nuuid: Failed to open \"\/etc\/machine-id\"\n\nthe \/etc\/machine-id not present in my machine, but I can't have permissions to generate that using \"dbus-uuidgen\"\nIs there any option to override that in the python code itself or in some env variable ?\nThanks\nOren","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":647,"Q_Id":62711323,"Users Score":1,"Answer":"No, having \/etc\/machine-id set is a requirement of D-Bus being installed. It looks like D-Bus was not installed correctly. You should be able to run dbus-uuidgen --ensure as root (or using sudo). If you don\u2019t have root access, you cannot fix this situation and you should get in touch with your system administrator.","Q_Score":0,"Tags":"python,linux,gtk,gtk3,dbus","A_Id":62715776,"CreationDate":"2020-07-03T08:19:00.000","Title":"Python3 Gtk3 : D-Bus library appears to be incorrectly set up; failed to read machine uuid: Failed to open \"\/etc\/machine-id\"","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm using miniconda on Ubuntu 20.04 with fish shell. I was able to create and activate my specific environment. My problem is with Python version which is related with $PATH.\n\nWhen I start clean fish shell, conda set it up for (base) environment $PATH looks like this:\n\nPATH=\/opt\/conda\/bin:\/opt\/conda\/condabin:\/usr\/local\/sbin:\/usr\/local\/bin:\/usr\/sbin:\/usr\/bin:\/sbin:\/bin:\/usr\/games:\/usr\/local\/games:\/opt\/conda\/bin:\/snap\/bin:\/opt\/conda\/bin\nit means, when I start Python it uses \/opt\/conda\/bin\/python version - conda (base) version.\n\nWhen I start my environment conda activate XXX it switch to XXX (more precisely, switch from base to XXX) and my $PATH looks like this:\n\nPATH=\/opt\/conda\/condabin:\/usr\/local\/sbin:\/usr\/local\/bin:\/usr\/sbin:\/usr\/bin:\/sbin:\/bin:\/usr\/games:\/usr\/local\/games:\/home\/USER\/.conda\/envs\/XXX\/bin:\/snap\/bin:\/opt\/conda\/bin\nit means, when I start Python it uses \/usr\/bin\/python. It is system version of Python.\n\nWhen I start new fish shell, deactivate (base) environment and and activate created one (XXX), $PATH looks like:\n\nPATH=\/home\/USER\/.conda\/envs\/XXX\/bin:\/opt\/conda\/condabin:\/usr\/local\/sbin:\/usr\/local\/bin:\/usr\/sbin:\/usr\/bin:\/sbin:\/bin:\/usr\/games:\/usr\/local\/games:\/snap\/bin:\/opt\/conda\/bin\nit means, when I start Python it uses \/home\/USER\/.conda\/envs\/XXX\/bin\/python\nProblems:\n\nWhenever I use XXX environment I expect to use \/home\/USER\/.conda\/envs\/XXX\/bin\/python which is not true when I switch from (base) to (XXX). To use above python I need to deactivate base and then switch to (XXX). It seams, \/home\/USER\/... should always be at the beginning of $PATH to choose appropriate python version.\n\nI would like to not use (base) as a default when I start new shell. I'v tried config --set auto_activate_base false which add auto_activate_base: false  to .\/condarc but it seams to be ignored.\n\n\nMy conda version is 4.8.3. My ~\/.config\/fish\/config.fish contains: eval \/opt\/conda\/bin\/conda \"shell.fish\" \"hook\" $argv | source.\nWhat I'm do wrong? How can I correct it?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":487,"Q_Id":62712180,"Users Score":0,"Answer":"you can do it in one Line and don't bother yourself (MacOS and Linux)\n\/(your conda installation path)\/bin\/conda init fish\nyour condo installation usually in '\/Users\/- your UserName -\/anaconda3'\nif someone want to know about install fish, best way is Homebrew. after brew install fish you must add fish to supportable shells in \/etc\/shells. and then with chsh change default shell to fish.\nif it's not clear ask in comment!","Q_Score":4,"Tags":"python,linux,anaconda,conda,fish","A_Id":72248167,"CreationDate":"2020-07-03T09:11:00.000","Title":"conda - PATH order in fish shell","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have developed a python script and want to put it in a RPM package. The only problem is that this script uses ovirtsdk4 module, which is not one of the builtin python modules. That being said, I would have to install this module within the RPM package. I can think of two ways to approach this:\n1 - Using pip3 in the %post section.\n2 - Putting the python3-ovirt-engine-sdk4 in the \"Requires: package \" section.\nHowever, first way does not seem quite reliable and the second doesn't seem to work properly since this package is not available on the CentOS-XXX repositories. (It belong to the ovirt repo).\nCan you think of a better way to approach this or am I missing anything?\nMany thanks.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":118,"Q_Id":62713985,"Users Score":0,"Answer":"The fact that the package is not in the CentOS repositories should not cause any problem, just make sure that you can download from the ovirt repository, then the update should run normally.\nTest first manually if you can yum install python3-ovirt-engine-sdk4.\nEDIT: don't install using pip3, because then you cannot manage the dependencies with rpm. You had the right intuition trying to use the rpm dependencies.","Q_Score":0,"Tags":"python-3.x,rpmbuild,ovirt","A_Id":62714174,"CreationDate":"2020-07-03T10:56:00.000","Title":"Building RPM package requires packages from outside repositories","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"When we want to do anything with our python virtual environment in terminal\/command prompt\/shell, we have to activate it by navigating to the scripts folder. But, what does this activation do?\nI can access the contents of the virtualenv folder in file explorer without activating it.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":1220,"Q_Id":62729150,"Users Score":4,"Answer":"At its core, the main purpose of Python virtual environments is to create an isolated environment for Python projects. This means that each project can have its own dependencies, regardless of what dependencies every other project has.\nMore interesting are the activate scripts in the bin directory. These scripts are used to set up your shell to use the environment\u2019s Python executable and its site-packages by default.\nAfter activating the environment, we\u2019re now getting a different path for the python executable because, in an active environment, the $PATH environment variable is slightly modified.","Q_Score":1,"Tags":"python,virtualenv","A_Id":62729235,"CreationDate":"2020-07-04T12:31:00.000","Title":"what does activating virtualenv in python exactly mean and what it does?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Unable to create virtual environment in windows using this command in command prompt\npython3 -m venv whatsapp-bot-venv\nIt throws an error as below\n'python3' is not recognized as an internal or external command,\noperable program or batch file.","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":25,"Q_Id":62731847,"Users Score":1,"Answer":"Use\n\npython -m venv whatsapp-bot-venv","Q_Score":0,"Tags":"python-3.x,virtualenv","A_Id":62731912,"CreationDate":"2020-07-04T16:47:00.000","Title":"Unable to create virtual environment in windows using this command","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"problem: I can't run \"tensorboard --logdir=summaries\" in my terminal because I get this error\n\nsystem: macbook pro running Catalina\nenvironment: running pyenv with python3 as global\npackage: I have tensorflow 2.2.0 installed via pip\nI have setuptools 49.1.0\n\nTraceback (most recent call last):\nFile \"\/usr\/local\/bin\/tensorboard\", line 10, in \nsys.exit(run_main())\nFile \"\/Library\/Python\/3.7\/site-packages\/tensorboard\/main.py\", line 65, in run_main\ndefault.get_plugins() + default.get_dynamic_plugins(),\nFile \"\/Library\/Python\/3.7\/site-packages\/tensorboard\/default.py\", line 125, in get_dynamic_plugins\n\"tensorboard_plugins\"\nFile \"\/Library\/Python\/3.7\/site-packages\/tensorboard\/default.py\", line 124, in \nfor entry_point in pkg_resources.iter_entry_points(\nFile \"\/Library\/Developer\/CommandLineTools\/Library\/Frameworks\/Python3.framework\/Versions\/3.7\/lib\/python3.7\/site-packages\/pkg_resources\/init.py\", line 2410, in load\nself.require(*args, **kwargs)\nFile \"\/Library\/Developer\/CommandLineTools\/Library\/Frameworks\/Python3.framework\/Versions\/3.7\/lib\/python3.7\/site-packages\/pkg_resources\/init.py\", line 2433, in require\nitems = working_set.resolve(reqs, env, installer, extras=self.extras)\nFile \"\/Library\/Developer\/CommandLineTools\/Library\/Frameworks\/Python3.framework\/Versions\/3.7\/lib\/python3.7\/site-packages\/pkg_resources\/init.py\", line 791, in resolve\nraise VersionConflict(dist, req).with_context(dependent_req)\npkg_resources.VersionConflict: (setuptools 40.8.0 (\/Library\/Developer\/CommandLineTools\/Library\/Frameworks\/Python3.framework\/Versions\/3.7\/lib\/python3.7\/site-packages), Requirement.parse('setuptools>=41.0.0'))","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":441,"Q_Id":62736306,"Users Score":0,"Answer":"As it turns out I was not using Pyenv correctly. Once I used \"pyenv global system\" then I was able to update the pip packages correctly and the right setuptools was installed and TensorBoard ran as expected","Q_Score":0,"Tags":"python,tensorflow,tensorboard","A_Id":62856531,"CreationDate":"2020-07-05T02:46:00.000","Title":"can't launch tensorboard from mac terminal","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"In our company, all the machines are Linux or windows. But the customer has a Unix system. Can I create a docker container in Linux then use it on Unix. I want the docker file to contain python with cx_oracle and pandas libraries And put them in the UNIX machine. Just want to make sure that the environment is working by using cx_oracle to connect on Oracle DB on the Unix machine.\n\nWhat will be exactly the code or docker file using cx_oracle and\npandas libraries that should be run on Unix and making sure that the\nenvironment is working by using cx_oracle to connect on Oracle DB on\nthe Unix machine?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":100,"Q_Id":62746919,"Users Score":0,"Answer":"It's always edge case differences between OSs that cause app porting problems: signal handling, subtle file system differences, etc.  How cx_Oracle behaves won't differ much between different OSs - except library initialization.  Make sure you test properly on the exact deployment environment. That way you will know exactly how to do the app & Oracle Client install, how the network needs to be configured, how the app needs to be tuned (e.g. best values for arraysize and prefetchrows for queries), etc.\nIn your case, it's the OS that Python will run on that matters, since this can be (and often is) different to the OS that the DB runs on.  I think you should test on the exact customer environment, not in some container (even if that works) or virtualized setup.\nFind the details and update your original question if you need more help.","Q_Score":0,"Tags":"python,linux,docker,unix,cx-oracle","A_Id":62747594,"CreationDate":"2020-07-05T22:17:00.000","Title":"Can I create Docker container in Linux to use it on Unix?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I need a TensorFlow version 2> and I installed that on my Ubuntu Server, but it gives me the AVX error. I tried the 1.5 version and it works but doesn't support Keras and the other commands I used. I am using python3.5. There are no errors in the code.\nOS: Ubuntu Server on a Server with 16GB ram\nPip: 19.0\nPython: 3.5.9","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":1814,"Q_Id":62747937,"Users Score":3,"Answer":"To fix this, you can install TensorFlow via anaconda and not pip. It work for me by doing this. If anybody knows why, they are welcome to explain.","Q_Score":2,"Tags":"python-3.x,linux,tensorflow,pip,avx","A_Id":62778317,"CreationDate":"2020-07-06T01:13:00.000","Title":"Tensorflow 2.2.0 support on non-AVX systems","Data Science and Machine Learning":1,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to setup Python 3 on my mac computer and I seem to have many versions of pip on my computer, not sure which I should be using.\nWhen I run  pip --version in the terminal I get pip 19.2.3 from \/Library\/Python\/2.7\/site-packages\/pip-19.2.3-py2.7.egg\/pip (python 2.7) which I am fairly certain is just the version that comes with mac os.\nWhen I run python3 -m pip --version I get pip 20.1.1 from \/Library\/Frameworks\/Python.framework\/Versions\/3.7\/lib\/python3.7\/site-packages\/pip (python 3.7) \nWhen I run pip3 --version I then get pip 19.0.3 from \/Library\/Developer\/CommandLineTools\/Library\/Frameworks\/Python3.framework\/Versions\/3.7\/lib\/python3.7\/site-packages\/pip (python 3.7) \nI was hoping somebody could explain the differences between","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":549,"Q_Id":62765893,"Users Score":0,"Answer":"The quick and nasty answer is each installation of python can have its own pip, which in turn will have a different pipenv. This is all based off of your path. Most people opt to use virtualenv to create an app specific python environment so as to not impact other python applications which depend on specific conflicting versions.","Q_Score":1,"Tags":"python,python-3.x,pip","A_Id":62765952,"CreationDate":"2020-07-06T23:25:00.000","Title":"Confused by multiple versions of pip on mac","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am running a Python gdb script on a program that runs with a Pintool. Specifically, I used the -appdebug_enable switch and created a semantic breakpoint in the Pintool that automatically triggers the breakpoint and runs the Python script that I sourced. The script basically inspects local and global variables and scans the memory that was dynamically allocated by the program. I notice that the gdb script runs orders of magnitude slower than if I run the program and gdb without the Pintool. I also tried with a dummy Pintool to see if my Pintool implementation caused the slowdown but it did not seem to be the case.\nMy conclusion is that Pin slows down my gdb script, but can anyone explain how and why? Is there any tool I can use to profile the performance slowdown from Pin?\n(I understand that gdb performance is not something people usually care too much about, but I am curious about the source of the slowdown.)","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":207,"Q_Id":62767550,"Users Score":0,"Answer":"In your case PIN is used as a JIT (just in time) compiler. So it is effectively stopping your program whenever instruction sequence change, and recompile  (main reason for delay) and also add some instructions of its own (additional delays). PIN takes your program executable as argument. From first instruction to next branch instruction (call,jmp,ret) it regenerate sequence of instruction with its additional set of instructions that will transfer control back to PIN framework after executing the generated instruction sequence. While regenerating code PIN allows a user using instrumentation code to inject additional analysis code.","Q_Score":0,"Tags":"gdb,intel-pin,gdb-python","A_Id":63295872,"CreationDate":"2020-07-07T03:08:00.000","Title":"Intel Pin GDB Runtime Overhead","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm starting to use Google Cloud Dataflow for batch and streaming processing. The jobs being developed are mostly for ingesting data from different sources (MySQL, Kafka, and file systems), cleansing them, do some streaming and bath aggregation, and writing back to Google Cloud Storage.\nGiven these tasks, are there any recommendations for using the Java SDK or Python SDK for writing the jobs? Any noticeable differences in terms of performance and features between them?\nFor example, I noticed that for the Java SDK, the built-in I\/O PTransform JdbcIO is available. This PTransform reads and writes data on JDBC, and this is not available in the Python SDK (so far). Is it possible to use the Java SDK only to create a pipeline that reads from a MySQL database and writes to Google Cloud Storage, while for the other pipelines use a different SDK (e.g. Python)?\nThanks in advance for your time!","AnswerCount":2,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":1112,"Q_Id":62778682,"Users Score":2,"Answer":"I would go ahead with java SDK as the features and external connectors are more in java. But python SDK is also catching up.\nAs far as performance considerations are concerned when we submit a beam job to dataflow, the job steps will be sent in an API call to the google cloud dataflow. Hence, I think there's no significant difference in performance as far as dataflow is concerned","Q_Score":0,"Tags":"java,python,google-cloud-platform,google-cloud-dataflow,apache-beam","A_Id":62778787,"CreationDate":"2020-07-07T15:27:00.000","Title":"Google Cloud Dataflow - Java SDK vs Python SDK","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"there is a way to debug a falcon app on windows? I'm using Pycharm.\nI use waitress to run from the command line, but I have no idea how to debug my source code.","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":594,"Q_Id":62779572,"Users Score":0,"Answer":"I have used pycharm 2018 and I have not found any support for debug falcon app(maybe I could be wrong ). What I have done is make a different file on same directory and put all function over there and debug that file as normal python script or. May be you can use print or kind of unit test to test your code.","Q_Score":0,"Tags":"python,windows,pycharm,falcon","A_Id":62780163,"CreationDate":"2020-07-07T16:14:00.000","Title":"How to debug falcon app on windows and pycharm?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"In Airflow, if I create a custom operator class, and use it in a dag, must it actually return anything?\nCouple of examples, let's say I create sensor operator (inherits from base_sensor_operator) which checks every 5 min for the existence of a file somewhere. Similar to check_for_wildcard_key() and how it returns True or False. Does any method I create have to actually have a return statement with this True\/False value in order to function? Will the scheduler know to retry this task without a return statement?\nAnother example is if I create a custom operator (non sensor) that executes SQL code in a database that isn't as common, so I need to create my own operator to connect to that database. So let's say I am using the method execute_SQL() inside my custom operator class. I need not have a return value, right? Since the operator object itself inside of a dag file will simply just \"run\", I don't need to return anything?\nI understand sometimes we have a use for xcom_push and xcom_pull, so it might be good to have return values in case we need to send\/receive results between tasks. Is it good practice to return something even if it might not be used? Will custom operator classes work without return statements?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":892,"Q_Id":62791606,"Users Score":3,"Answer":"No, an Operator class does not need to return anything. Actually the main function of an operator is the execute method, and most of them does not return anything. Examples: BranchPythonOperator, TriggerDagRunOperator, DatabricksRunNowOperator, etc. They just do the job.\nOn the other hand, the poke method of the sensors need to return True or False since the execute method of the BaseSensorOperator calls self.poke method, and takes action based on the return value.","Q_Score":2,"Tags":"python,airflow","A_Id":62794380,"CreationDate":"2020-07-08T09:24:00.000","Title":"Does an Airflow operator need to return anything in order to function correctly?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am pretty new to Tornado. I can't understand the difference between using run_on_executor and defining an async method. Is it the same? Is the one multithreaded and the other not?\nThank you in advance.","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":416,"Q_Id":62791646,"Users Score":4,"Answer":"run_on_executor is for interfacing with blocking non-async code.\nYou are correct that async code is only executed in a single thread.\nMaybe an example would illustrate the point.\nLet's say your Tornado web service interfaces with a library that makes use of requests to fetch country info for a given IP address. Since requests is a non-async library, calling this function would block the Tornado event loop.\nSo, you have two options: try to find the replacement for the library that is async-compatible OR run the blocking code in a different thread\/process and have your event loop await its result like for normal async code without blocking the event loop. The latter option is run_on_executor which allows you to run the task in different thread or process, and asyncio would \"await\" its completion.","Q_Score":2,"Tags":"python,python-3.x,asynchronous,tornado,scheduledexecutorservice","A_Id":62911633,"CreationDate":"2020-07-08T09:26:00.000","Title":"Tornado difference between run in executor and defining async methods","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm running python scripts that do batch data processing on fairly large aws instances (48 or 96 vCPU).  multiprocessing.Pool() works nicely: the workers have minimal communication with the main process (take a file path, return True\/False).  I\/O and memory don't seem to be limiting.\nI've had variable performance where sometimes the best speed comes from pool size = number of vCPU, sometimes number of vCPU\/2, and sometimes vCPU*some multiple around 2-4.  These are for different kinds of jobs, on different instances, so it would be hard to benchmark all of them.\nIs there a rule of thumb for what size pool to use?\nP.S. multiprocessing.cpu_count() returns a number that seems to be equal to the number of vCPU. If that is consistent, I'd like to pick some reasonable multiple of cpu_count and just leave it at that.","AnswerCount":2,"Available Count":1,"Score":0.2913126125,"is_accepted":false,"ViewCount":1131,"Q_Id":62803255,"Users Score":3,"Answer":"The reason for those numbers:\n\nnumber of vCPU: It is reasonable, we use all the cores.\nnumber of vCPU\/2: It is also reasonable, as sometimes we have double logical cores compares to the physical cores. But logical cores won't actually speed your program up, so we just use vCPU\/2.\nvCPU*some multiple around 2-4: It is reasonable for some IO-intensive tasks. For these kinds of tasks, the process is not occupying the core all the time, so we can schedule some other tasks during IO operations.\n\nSo now let's analyze the situation, I guess you are running on a server which might be a VPS. In this case, there is no difference between logical cores and physical cores, because vCPU is just an abstract computation resource provided by the VPS provider. You cannot really touch the underlying physical cores.\nIf your main process is not computation-intensive, or let's say it is just a simple controller, then you don't need to allocate a whole core for it, which means you don't need to minus one.\nBased on your situation, I would like to suggest the number of vCPU. But you still need to decide based on the real situation you meet. The critical rule is:\nMaximize resource usage(use as many cores as you can), minimize resource competition(Too many processes will compete for the resource, which will slow the whole program down).","Q_Score":2,"Tags":"python,amazon-ec2,python-multiprocessing","A_Id":62803840,"CreationDate":"2020-07-08T20:36:00.000","Title":"Multiprocessing pool size - cpu_count or cpu_count\/2?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"[W 200709 09:47:12 iostream:887] Write error on <socket.socketobject object at 0x36c2910>: [Errno 113] No route to host\n[I 200709 09:47:12 web:2064] 200 GET \/templates\/js\/system\/sytemlog-control.js?=1594259185262 (10.2.26.57) 8.45ms\n[I 200709 09:47:12 web:2064] 304 GET \/templates\/html\/main.html?u=system\/systemlog (10.12.33.99) 7.92ms\n[W 200709 09:47:13 iostream:887] Write error on <socket._socketobject object at 0x36c2ad0>: [Errno 113] No route to host\n[W 200709 09:47:13 iostream:887] Write error on <socket._socketobject object at 0x36c2c90>: [Errno 113] No route to host\n[W 200709 09:47:13 iostream:887] Write error on <socket._socketobject object at 0x36c2d00>: [Errno 113] No route to host\n[W 200709 09:47:14 iostream:887] Write error on <socket.socketobject object at 0x36c2ec0>: [Errno 113] No route to host\n[I 200709 09:47:14 web:2064] 200 GET \/templates\/js\/system\/sytemlog-control.js?=1594259245749 (10.12.33.99) 1.74ms\n[W 200709 09:47:15 iostream:887] Write error on <socket._socketobject object at 0x36c2fa0>: [Errno 113] No route to host\n[W 200709 09:47:16 iostream:887] Write error on <socket._socketobject object at 0x3610f30>: [Errno 113] No route to host\n[W 200709 09:47:17 iostream:887] Write error on <socket._socketobject object at 0x36108a0>: [Errno 113] No route to host\n[I 200709 09:47:18 web:2064] 200 POST \/auth\/system\/log!list?callback=jQuery2140877480096841464_1594259245751 (10.12.33.99) 242.50ms\n[W 200709 09:47:18 iostream:887] Write error on <socket._socketobject object at 0x3610050>: [Errno 113] No route to host\n[W 200709 09:47:19 iostream:887] Write error on <socket._socketobject object at 0x3610210>: [Errno 113] No route to host\n[W 200709 09:47:20 iostream:887] Write error on <socket._socketobject object at 0x3610130>: [Errno 113] No route to host\n[W 200709 09:47:21 iostream:887] Write error on <socket._socketobject object at 0x3610c90>: [Errno 113] No route to host\n[W 200709 09:47:22 iostream:887] Write error on <socket._socketobject object at 0x36103d0>: [Errno 113] No route to host","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":59,"Q_Id":62806387,"Users Score":0,"Answer":"Without further information it is quite simply that the ability for the Tornado server to connect via this socket has been lost.\nThis assumes there was a connection open between the Tornado server and something else (by the context of what you said): has the network been changed? Have you shut a dependency down that the Tornado server relies on!?! Has a shared socket based filesystem disappeared???\nI hope this helps, but basically somewhere in your Tornado servers world a connection has been broken.\nBest of luck!","Q_Score":0,"Tags":"python,tornado","A_Id":62806436,"CreationDate":"2020-07-09T02:20:00.000","Title":"When I use tornado web server, logs show this error. How can I resolve it?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Somehow after 10 minutes supervisord stops processing. Processes still on the background but not working anymore. We need to kill the processes first before supervisord starts processing again. Our work around is to add a cron job to kill all supervisord processes every 10 minutes. Is there a way to fix this issue in supervisord so we would not kill processes anymore?\nSupervisord version: 3.4.0\nPython version: 2.7.5\nCentos 7 OS","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":96,"Q_Id":62849717,"Users Score":0,"Answer":"I found the main problem. In our code we added a $messenger->wait(3600) which turns out to be where process hungs because supervisord is waiting for a return or and exit. What we did was to make the wait lower to 500 and added exit(0) after it. Seems like supervisord in Centos 7 will have an issue if scripts does not do a clear exit. On Centos 6 we did not encounter the issue.","Q_Score":0,"Tags":"python,linux,centos,centos7,supervisord","A_Id":62993446,"CreationDate":"2020-07-11T13:23:00.000","Title":"Supervisord Stops Hangs\/Hungs on the Background after 10 minutes","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm writing installer for my program with python.\nWhen everything is extracted, how can i make my program .exe file to run with Windows startup?\nI want to make it fully automatic, without any user input.\nThanks.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":195,"Q_Id":62850142,"Users Score":0,"Answer":"You don't need to use Python for this. You can copy your .exe file and paste it in this directory:\n\nC:\\Users\\YourUsername\\AppData\\Roaming\\Microsoft\\Windows\\Start\nMenu\\Programs\\Startup\n\nIt will run automatically when your computer starts.","Q_Score":0,"Tags":"python,windows","A_Id":62850170,"CreationDate":"2020-07-11T14:03:00.000","Title":"Putting .exe file in windows autorun with python","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"This sounds counter intuitive, but what would be the pros and cons of updating the airflow database by deploying a job to airflow?\nI am considering this as an option to set up role based accesses by directly making updates to the database, and because Airflow is a scheduler, it would make sense to do schedule this process on Airflow.\nThanks","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":56,"Q_Id":62886697,"Users Score":0,"Answer":"We actually do this to purge down the logs table periodically along with some other general Airflow housekeeping. The downsides aren't too bad assuming you tested your code elsewhere first and you're not running the process on an extremely small schedule.\nI would recommend that you read the airflow.models module and classes, and how they're used, and that you leverage them as examples for your process; it'll help to make sure you're doing things correctly and save you from needless duplication.","Q_Score":0,"Tags":"python-3.x,airflow,rbac","A_Id":63004798,"CreationDate":"2020-07-14T01:25:00.000","Title":"Updating the airflow database by scheduling a job to Airflow","Data Science and Machine Learning":0,"Database and SQL":1,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Previously I used Python 3.6.8 version . I uninstall python removed environment variable, and\nre-installed the same version and set the Environment variable Manually. But now when I run python --version in cmd is not displaying any error and points to a new line as follows.\nC:\\Users\\User>python --version\nC:\\Users\\User>\nWhen I set path it not gives any issue.\nC:\\Users\\User>set path=\"C:\\dir1\\dir\"\nC:\\Users\\User>python --version\nPython 3.6.8\nC:\\Users\\User>\nI need to resolve this by setting environment variable.\nAdditionally pycharm can detect python.","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":228,"Q_Id":62900152,"Users Score":0,"Answer":"You can add the directory to the path for all future terminals (including cmd) by:\n\nOpen \"System Properties\" - how you do this depends on your windows version, on Win 10 you click the settings icon and type \"environment\" into the search bar and it'll give you the right option.\nGo to the \"Advanced\" tab\nAt the bottom there is a button for \"Environment Variables\".  Click that.\nIn the \"System Variables\" window, highlight the \"Path\" variable and click the \"Edit\" button.\nNow click \"New\" and add the directory that you've been adding manually.\n\nYou will need to start a new terminal as this does not update the path for currently open terminals.\nAlso note: \"python --version\" isn't looking for an environment variable, it's running the python.exe with the \"--version\" option (which, of course, reports the version).","Q_Score":1,"Tags":"python-3.x,environment-variables","A_Id":62900598,"CreationDate":"2020-07-14T16:54:00.000","Title":"Windows 10 unable detect the Python Environment Variable","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Previously I used Python 3.6.8 version . I uninstall python removed environment variable, and\nre-installed the same version and set the Environment variable Manually. But now when I run python --version in cmd is not displaying any error and points to a new line as follows.\nC:\\Users\\User>python --version\nC:\\Users\\User>\nWhen I set path it not gives any issue.\nC:\\Users\\User>set path=\"C:\\dir1\\dir\"\nC:\\Users\\User>python --version\nPython 3.6.8\nC:\\Users\\User>\nI need to resolve this by setting environment variable.\nAdditionally pycharm can detect python.","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":228,"Q_Id":62900152,"Users Score":0,"Answer":"I resolved this issue. I cleaned the registry using CCleaner and reinstalled the python version as a fresh installation. Now it Works properly.","Q_Score":1,"Tags":"python-3.x,environment-variables","A_Id":63592007,"CreationDate":"2020-07-14T16:54:00.000","Title":"Windows 10 unable detect the Python Environment Variable","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a large python script. It prints a bunch of output on my terminal console. The problem is the print is not happening altogether. Some print statements print one blob of statements together, then under that some other part of code prints some stuff. It goes on as long as the main loop runs.\nIssue is I get the output as I want but all is getting printed on console as that is where we are running the python main script.\nIt would be very helpful if along with the print happening at console, I can get all the output in console in same format to a text file also for retention.\nAgain, there are bunch of print statements occurring in different parts of the whole script. So not sure how to retain the whole output of console in same format to a final text file.","AnswerCount":4,"Available Count":1,"Score":0.049958375,"is_accepted":false,"ViewCount":855,"Q_Id":62909803,"Users Score":1,"Answer":"I would rather go ahead with bash and use tee command. It redirects the output to a file too.\npython -u my.py | tee my_file.txt","Q_Score":1,"Tags":"python","A_Id":62909845,"CreationDate":"2020-07-15T07:37:00.000","Title":"How to store output printed on terminal console to a text file in Python","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am on a 64-bit Intel Core i3 7th generation machine. I installed python there and after which when I typed python on the command line to make sure that it is properly installed I found that it has installed the 32 bit version of the same. The shell prompt displayed something like this - MSC v.1916 32 bit (Intel)] on win32.\nIs it fine or is there some issue which can be fixed?\nThanks in advance.","AnswerCount":3,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":72,"Q_Id":62911792,"Users Score":0,"Answer":"There could be only a single problem that is the performance. Else everything will go good.\nThe speed may be a bit low.\nAnyway you can simply uninstall the 32 bit and install 64 bit if you want.","Q_Score":0,"Tags":"python,python-3.x,windows","A_Id":62911983,"CreationDate":"2020-07-15T09:30:00.000","Title":"Error installing Python on my Windows 64-bit Machine","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am on a 64-bit Intel Core i3 7th generation machine. I installed python there and after which when I typed python on the command line to make sure that it is properly installed I found that it has installed the 32 bit version of the same. The shell prompt displayed something like this - MSC v.1916 32 bit (Intel)] on win32.\nIs it fine or is there some issue which can be fixed?\nThanks in advance.","AnswerCount":3,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":72,"Q_Id":62911792,"Users Score":0,"Answer":"You need to download the 64-bit installation file to install 64-bit Python.\nThe 32-bit and 64-bit installation files are different.\nBe sure to install the 64-bit file.","Q_Score":0,"Tags":"python,python-3.x,windows","A_Id":62912174,"CreationDate":"2020-07-15T09:30:00.000","Title":"Error installing Python on my Windows 64-bit Machine","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying log to AWS cloud watch and I am getting this error. same code was working all from yesterday without issues.\nI looked into some article and I installed certifi package as well but this also did not help\nI am using Python 3.5 and watchtower to log data to AWS cloud watch.\nI am running my python code in windows 10 OS.\nCan you please help me with this?\n\n\nTraceback (most recent call last):\nFile \"C:\\Users\\BBB\\AppData\\Local\\Programs\\Python\\Python35\\lib\\site-packages\\urllib3\\connectionpool.py\", line 677, in urlopen\nchunked=chunked,\nFile \"C:\\Users\\BBB\\AppData\\Local\\Programs\\Python\\Python35\\lib\\site-packages\\urllib3\\connectionpool.py\", line 381, in _make_request\nself._validate_conn(conn)\nFile \"C:\\Users\\BBB\\AppData\\Local\\Programs\\Python\\Python35\\lib\\site-packages\\urllib3\\connectionpool.py\", line 976, in validate_conn\nconn.connect()\nFile \"C:\\Users\\BBB\\AppData\\Local\\Programs\\Python\\Python35\\lib\\site-packages\\urllib3\\connection.py\", line 370, in connect\nssl_context=context,\nFile \"C:\\Users\\BBB\\AppData\\Local\\Programs\\Python\\Python35\\lib\\site-packages\\urllib3\\util\\ssl.py\", line 377, in ssl_wrap_socket\nreturn context.wrap_socket(sock, server_hostname=server_hostname)\nFile \"C:\\Users\\BBB\\AppData\\Local\\Programs\\Python\\Python35\\lib\\ssl.py\", line 376, in wrap_socket\n_context=self)\nFile \"C:\\Users\\BBB\\AppData\\Local\\Programs\\Python\\Python35\\lib\\ssl.py\", line 747, in init\nself.do_handshake()\nFile \"C:\\Users\\BBB\\AppData\\Local\\Programs\\Python\\Python35\\lib\\ssl.py\", line 983, in do_handshake\nself._sslobj.do_handshake()\nFile \"C:\\Users\\BBB\\AppData\\Local\\Programs\\Python\\Python35\\lib\\ssl.py\", line 628, in do_handshake\nself._sslobj.do_handshake()\nssl.SSLError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:646)\nDuring handling of the above exception, another exception occurred:\nTraceback (most recent call last):\nFile \"C:\\Users\\BBB\\AppData\\Local\\Programs\\Python\\Python35\\lib\\site-packages\\botocore\\httpsession.py\", line 263, in send\nchunked=self._chunked(request.headers),\nFile \"C:\\Users\\BBB\\AppData\\Local\\Programs\\Python\\Python35\\lib\\site-packages\\urllib3\\connectionpool.py\", line 725, in urlopen\nmethod, url, error=e, _pool=self, _stacktrace=sys.exc_info()[2]\nFile \"C:\\Users\\BBB\\AppData\\Local\\Programs\\Python\\Python35\\lib\\site-packages\\urllib3\\util\\retry.py\", line 379, in increment\nraise six.reraise(type(error), error, _stacktrace)\nFile \"C:\\Users\\BBB\\AppData\\Local\\Programs\\Python\\Python35\\lib\\site-packages\\urllib3\\packages\\six.py\", line 734, in reraise\nraise value.with_traceback(tb)\nFile \"C:\\Users\\BBB\\AppData\\Local\\Programs\\Python\\Python35\\lib\\site-packages\\urllib3\\connectionpool.py\", line 677, in urlopen\nchunked=chunked,\nFile \"C:\\Users\\BBB\\AppData\\Local\\Programs\\Python\\Python35\\lib\\site-packages\\urllib3\\connectionpool.py\", line 381, in _make_request\nself.validate_conn(conn)\nFile \"C:\\Users\\BBB\\AppData\\Local\\Programs\\Python\\Python35\\lib\\site-packages\\urllib3\\connectionpool.py\", line 976, in validate_conn\nconn.connect()\nFile \"C:\\Users\\BBB\\AppData\\Local\\Programs\\Python\\Python35\\lib\\site-packages\\urllib3\\connection.py\", line 370, in connect\nssl_context=context,\nFile \"C:\\Users\\BBB\\AppData\\Local\\Programs\\Python\\Python35\\lib\\site-packages\\urllib3\\util\\ssl.py\", line 377, in ssl_wrap_socket\nreturn context.wrap_socket(sock, server_hostname=server_hostname)\nFile \"C:\\Users\\BBB\\AppData\\Local\\Programs\\Python\\Python35\\lib\\ssl.py\", line 376, in wrap_socket\ncontext=self)\nFile \"C:\\Users\\BBB\\AppData\\Local\\Programs\\Python\\Python35\\lib\\ssl.py\", line 747, in init\nself.do_handshake()\nFile \"C:\\Users\\BBB\\AppData\\Local\\Programs\\Python\\Python35\\lib\\ssl.py\", line 983, in do_handshake\nself.sslobj.do_handshake()\nFile \"C:\\Users\\BBB\\AppData\\Local\\Programs\\Python\\Python35\\lib\\ssl.py\", line 628, in do_handshake\nself.sslobj.do_handshake()\nurllib3.exceptions.SSLError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (ssl.c:646)\nDuring handling of the above exception, another exception occurred:\nTraceback (most recent call last):\nFile \".\\test_main.py\", line 2, in \nimport test_provision_api\nFile \"C:\\Users\\BBB\\Documents\\Drive D\\GIT_Local\\NBNBNN\\Python_Logging\\V2.1\\test_provision_api.py\", line 39, in \nobj_PdAdmin.call_provisionadmin(pv_url1, WssVersion_list[0], master_AffId[0], master_Culture[0])\nFile \"C:\\Users\\BBB\\Documents\\Drive D\\GIT_Local\\NBNBNN\\Python_Logging\\V2.1\\test_provision_api.py\", line 26, in call_provisionadmin\nHttpJsonlogger.info('PD Admin - \/ProductDefinition', extra=pd_admin_extra)\nFile \"C:\\Users\\BBB\\AppData\\Local\\Programs\\Python\\Python35\\lib\\logging_init.py\", line 1279, in info\nself.log(INFO, msg, args, **kwargs)\nFile \"C:\\Users\\BBB\\AppData\\Local\\Programs\\Python\\Python35\\lib\\logging_init.py\", line 1415, in log\nself.handle(record)\nFile \"C:\\Users\\BBB\\AppData\\Local\\Programs\\Python\\Python35\\lib\\logging_init.py\", line 1425, in handle\nself.callHandlers(record)\nFile \"C:\\Users\\BBB\\AppData\\Local\\Programs\\Python\\Python35\\lib\\logging_init.py\", line 1487, in callHandlers\nhdlr.handle(record)\nFile \"C:\\Users\\BBB\\AppData\\Local\\Programs\\Python\\Python35\\lib\\logging_init.py\", line 855, in handle\nself.emit(record)\nFile \"C:\\Users\\BBB\\AppData\\Roaming\\Python\\Python35\\site-packages\\watchtower_init.py\", line 174, in emit\nlogStreamName=stream_name)\nFile \"C:\\Users\\BBB\\AppData\\Roaming\\Python\\Python35\\site-packages\\watchtower_init.py\", line 20, in _idempotent_create\n_callable(args, **kwargs)\nFile \"C:\\Users\\BBB\\AppData\\Local\\Programs\\Python\\Python35\\lib\\site-packages\\botocore\\client.py\", line 316, in _api_call\nreturn self._make_api_call(operation_name, kwargs)\nFile \"C:\\Users\\BBB\\AppData\\Local\\Programs\\Python\\Python35\\lib\\site-packages\\botocore\\client.py\", line 622, in _make_api_call\noperation_model, request_dict, request_context)\nFile \"C:\\Users\\BBB\\AppData\\Local\\Programs\\Python\\Python35\\lib\\site-packages\\botocore\\client.py\", line 641, in _make_request\nreturn self._endpoint.make_request(operation_model, request_dict)\nFile \"C:\\Users\\BBB\\AppData\\Local\\Programs\\Python\\Python35\\lib\\site-packages\\botocore\\endpoint.py\", line 102, in make_request\nreturn self._send_request(request_dict, operation_model)\nFile \"C:\\Users\\BBB\\AppData\\Local\\Programs\\Python\\Python35\\lib\\site-packages\\botocore\\endpoint.py\", line 137, in _send_request\nsuccess_response, exception):\nFile \"C:\\Users\\BBB\\AppData\\Local\\Programs\\Python\\Python35\\lib\\site-packages\\botocore\\endpoint.py\", line 256, in _needs_retry\ncaught_exception=caught_exception, request_dict=request_dict)\nFile \"C:\\Users\\BBB\\AppData\\Local\\Programs\\Python\\Python35\\lib\\site-packages\\botocore\\hooks.py\", line 356, in emit\nreturn self._emitter.emit(aliased_event_name, **kwargs)\nFile \"C:\\Users\\BBB\\AppData\\Local\\Programs\\Python\\Python35\\lib\\site-packages\\botocore\\hooks.py\", line 228, in emit\nreturn self._emit(event_name, kwargs)\nFile \"C:\\Users\\BBB\\AppData\\Local\\Programs\\Python\\Python35\\lib\\site-packages\\botocore\\hooks.py\", line 211, in _emit\nresponse = handler(kwargs)\nFile \"C:\\Users\\BBB\\AppData\\Local\\Programs\\Python\\Python35\\lib\\site-packages\\botocore\\retryhandler.py\", line 183, in call\nif self._checker(attempts, response, caught_exception):\nFile \"C:\\Users\\BBB\\AppData\\Local\\Programs\\Python\\Python35\\lib\\site-packages\\botocore\\retryhandler.py\", line 251, in call\ncaught_exception)\nFile \"C:\\Users\\BBB\\AppData\\Local\\Programs\\Python\\Python35\\lib\\site-packages\\botocore\\retryhandler.py\", line 277, in _should_retry\nreturn self._checker(attempt_number, response, caught_exception)\nFile \"C:\\Users\\BBB\\AppData\\Local\\Programs\\Python\\Python35\\lib\\site-packages\\botocore\\retryhandler.py\", line 317, in call\ncaught_exception)\nFile \"C:\\Users\\BBB\\AppData\\Local\\Programs\\Python\\Python35\\lib\\site-packages\\botocore\\retryhandler.py\", line 223, in call\nattempt_number, caught_exception)\nFile \"C:\\Users\\BBB\\AppData\\Local\\Programs\\Python\\Python35\\lib\\site-packages\\botocore\\retryhandler.py\", line 359, in _check_caught_exception\nraise caught_exception\nFile \"C:\\Users\\BBB\\AppData\\Local\\Programs\\Python\\Python35\\lib\\site-packages\\botocore\\endpoint.py\", line 200, in _do_get_response\nhttp_response = self._send(request)\nFile \"C:\\Users\\BBB\\AppData\\Local\\Programs\\Python\\Python35\\lib\\site-packages\\botocore\\endpoint.py\", line 269, in _send\nreturn self.http_session.send(request)\nFile \"C:\\Users\\BBB\\AppData\\Local\\Programs\\Python\\Python35\\lib\\site-packages\\botocore\\httpsession.py\", line 281, in send\nraise SSLError(endpoint_url=request.url, error=e)\nbotocore.exceptions.SSLError: SSL validation failed for https:\/\/logs.-**-.amazonaws.com\/ [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:646)","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":508,"Q_Id":62941750,"Users Score":0,"Answer":"I don't know the specific about your case but certificate validation always end up with the following solutions:\n\nthe certificate is expired\nthe certificate is not trusted because you don't have the public key or the certificate authority in your trust file\/truststore\nthe domain is not covered by the certificate\n\nThe message provided seems to tell the domain https:\/\/logs.-**-.amazonaws.com is not covered by the certificate\nSo download the certificate, get the details and check if:\n\n\"Delivered to\" field cover the domain name\none of \"Subject Alternative Name (SAN)\" cover the domain name\n\nEDIT:\nTo download the certificate either use a browser to load the url and use the \"lock\" icon to download the certificate or use openssl utility to download the certificate from the url. To get the details, save the certificate with the \".cer\" extension and double click on it or use openssl utility to get the details from a certificate file.\nGood luck","Q_Score":0,"Tags":"python-3.x,amazon-cloudwatchlogs","A_Id":62942895,"CreationDate":"2020-07-16T18:56:00.000","Title":"ssl.SSLError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:646)","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I created an app successfully from a Tutorial on Web2Py but when I uploaded the application to PythonAnywhere, I received this error:\nError ticket for \"pluralsight\"\nTicket ID\n75.159.30.26.2020-07-17.15-41-34.00821419-8e86-4d99-881d-c2cb400d0e22\n<type 'exceptions.ValueError'> unsupported pickle protocol: 3\nVersion\nweb2py\u2122     Version 2.18.5-stable+timestamp.2019.04.08.04.22.03\nPython  Python 2.7.12: \/usr\/local\/bin\/uwsgi (prefix: \/usr)","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":44,"Q_Id":62957442,"Users Score":1,"Answer":"It sounds like you're running web2py on Python 3 locally and with Python 2 on PythonAnywhere.  The best solution would be to upgrade it on PythonAnywhere:\n\nMake sure that you're using the most recent version of web2py itself by upgrading it from the main admin page inside your hosted web2py.\nOnce it's fully upgraded, go to the \"Web\" page inside PythonAnywhere and change the Python version to the version of Python 3 that matches the one that you're using locally (eg. 3.7 or 3.8)\nReload the site using the green button at the top of the \"Web\" page inside PythonAnywhere.\n\nThen you should be able to upload your app.","Q_Score":0,"Tags":"web2py,pythonanywhere","A_Id":62993464,"CreationDate":"2020-07-17T15:46:00.000","Title":"Why would a Web2Py website work locally but give me errors when I upload it to PythonAnywhere? How would I fix an error I don't get locally?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I'm working on an application that runs on different platforms like Windows, Ubuntu and Raspberry Pi. Think of it as a webapp served by a Python Flask server. So far I have been running the app on Ubuntu. I want to port the code and make the app run on Windows and Raspberry Pi as well.\nThis is what's common among all platforms - the core part of the app, the flask server remains unchanged along with the UI code\nThis is what's different - the data and the functionalities. If Ubuntu and Windows version of the app has a dozen features, the one for Raspberry Pi will have only half of those. The data that is needed for the functionalities also changes accordingly. Another notable change is utility functions. For ex: I will have to use different Text-to-Speech programs on each of these platforms.\nIt works if I create separate repos for each. I want to know what the development and code management process for such a scenario will be like. Below are the thoughts I have on mind which I feel I could try out:\n\nSeparate repos for supporting each platform\nSingle repo with different folders for each\nSingle repo with common code separated out(I'm not sure if this is doable)\nDifferent branches for each platform support\n\nWould love to know what the standard procedure is for such a development activity and how usual each of the above 4 approaches are(especially 4). Thanks!","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":23,"Q_Id":62958785,"Users Score":0,"Answer":"Usually what one does is either some sort of feature checking or abstraction, or both.  For example, you can write an interface for text to speech and then provide an implementation for each platform.  Similarly, you can do a feature check for feature foo and then define it as absent or present on each platform.\nThis is the approach most codebases use, and it maintains better compatibility across versions than separate repos.  Using separate branches means you'll likely end up with a lot of conflicts merging features into various branches.\nIt may be that some platform-specific or feature-specific code will live in separate files or folders, and that's necessary and okay.  It may be desirable to isolate that code so it doesn't load dependencies that don't exist, for example.  But you will want to share most of the code as much as possible with uniform interfaces.\nBy making it feature based, you focus on the features available, so if the Raspberry Pi becomes more capable, then you just turn on the feature.  Similarly, if you decide you want to support macOS, you can just find out what features that OS can support and turn those on.  Similarly, you can add an abstraction for the native text-to-speech layer on macOS, and then flip that feature as well.","Q_Score":0,"Tags":"python,version-control,raspberry-pi,repository,cross-platform","A_Id":62986689,"CreationDate":"2020-07-17T17:12:00.000","Title":"Maintain source code of app that runs on different platforms","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I successfully configured gurobi on centos 7 and it works if I try gurobi_cl on a test.lp file where the test.lp file contains just one line:\nMinimize\nNow i try to import gurobi from a script that is launched from httpd an I get this error:\nFrom gurobi import *\nFile\"\/usr\/lib\/python2.7\/site-packages\/gurobipy\/init.py\" line 1 in \nFrom .gurobi import *\nImportError: libgurobi90.so: cannot open shared object file:\nNo such file or directory\nI am using gurobi9.0.1 and python 3.7 and I don't know why gurobi is calling python 2.7 in the log below.\nCould you please help me?\nThanks","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":45,"Q_Id":62959519,"Users Score":0,"Answer":"Solved the problem. I had to add gurobi_pi.conf under old.so.conf containing the path to my gurobi folder\n\nldconfig","Q_Score":0,"Tags":"python-3.x,httpd.conf,gurobi","A_Id":62959715,"CreationDate":"2020-07-17T18:04:00.000","Title":"Problem when importing gurobi through httpd","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"My mac has python3 and python2 installed by default.\nBefore now, only python3 and pip3 commands were working on the macOS terminal. But when I upgraded my pip pip3 install --upgrade pip, my pip command works as well, and when I type python --version it shows 2.7.16. Although I still have python3 installed, I don't like having python2. Can I uninstall python2 or is it just not possible?\nKeep in mind that the python --version command showed an error before I upgraded pip","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":315,"Q_Id":62966955,"Users Score":0,"Answer":"If Python 2 was installed onto your Mac by default, do NOT try to remove it as it is not possible, and could break your entire operating system.","Q_Score":0,"Tags":"python,python-3.x,macos,terminal","A_Id":62967032,"CreationDate":"2020-07-18T09:36:00.000","Title":"Can I uninstall python2 from macos?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"My mac has python3 and python2 installed by default.\nBefore now, only python3 and pip3 commands were working on the macOS terminal. But when I upgraded my pip pip3 install --upgrade pip, my pip command works as well, and when I type python --version it shows 2.7.16. Although I still have python3 installed, I don't like having python2. Can I uninstall python2 or is it just not possible?\nKeep in mind that the python --version command showed an error before I upgraded pip","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":315,"Q_Id":62966955,"Users Score":0,"Answer":"As @GavinWong said, do not try to remove Python 2 from your Mac. Some of the scripts used by the operating system are written in Python 2 and hence Python 2 must be available for Mac to fubtion properly.","Q_Score":0,"Tags":"python,python-3.x,macos,terminal","A_Id":62971156,"CreationDate":"2020-07-18T09:36:00.000","Title":"Can I uninstall python2 from macos?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I got this error while I tried to install Xilinx Petalinux on Ubuntu 20.04\n\ndpkg-query: package 'python' is not installed and no information is available\nUse dpkg --info (= dpkg-deb --info) to examine archive files\nERROR: You have tools don't meet the version requirements:\n-Detected python version is less than the expected 2.7.3\n\nI reinstalled python several times, it didn't work out.","AnswerCount":4,"Available Count":1,"Score":0.1488850336,"is_accepted":false,"ViewCount":3223,"Q_Id":62980416,"Users Score":3,"Answer":"I installed petalinux on Ubuntu 20.04\nI had the same issue as you describe. The issue is how petalinux installer checks for version of python using dpkg and a renaming of package python to python2.7\nI resolved by ensuring I installed python2 e.g.\nsudo apt-get install python2.7-minimal:i386\nor\nsudo apt-get install python2.7-minimal:amd64\n(I did both by mistake!)\nthen I tricked dpkg into thinking \"python\" was installed by copying the section called Package: python2.7\nand renaming to:-\nPackage: python\nin file \/var\/lib\/dpkg\/status\nThis 'hack' enables dpkg to report the installed python version for installed python2.7\nThe petalinux installer, when querying the version of python, now succeeds and the installation progresses.\nHOWEVER there is a reported issue on how the script uses sed, so the final trick is to use a sed shim as reported on xilinx forum \"PetaLinux 2018.1 Install Fails on Debian Stretch\"\nok. It's a bit of a hack to convince the installer to not prematurely fail.  If there are more elegant solutions I'm interested to learn them.","Q_Score":6,"Tags":"python,xilinx,petalinux","A_Id":63306380,"CreationDate":"2020-07-19T12:39:00.000","Title":"python error when installing Xilinx Petalinux on Ubuntu 20.04","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"How can you send an email from a Databricks platform?\nI would like to send an email from a notebook in Databricks with Python. I'm wondering if there's already an SMTP client already configured that I can use. I tried to do it, but didn't succeed.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":59,"Q_Id":62992249,"Users Score":1,"Answer":"The answer is \"no\". There's no smtp client included in Databricks.\nBut you can define yours outside and use it through the Databricks platform.","Q_Score":1,"Tags":"python,smtp,databricks","A_Id":66561871,"CreationDate":"2020-07-20T09:16:00.000","Title":"Is there a smtp client included in Databricks platform to be able to send emails?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm working with VSCode on an Ubuntu 18.04 machine. Everything is fine except that I can't get back to the previous command in Python Interactive Window via Arrow Up. It works in the integrated terminal though, integrated shell is \/bin\/bash.\nI have no idea where this is coming from. I changed \"keyboard.dispatch\" to \"keyCode\", but that's not the problem. I also tried different versions of the python-extension.\nDo you have any idea?\nThanks!","AnswerCount":2,"Available Count":2,"Score":-0.0996679946,"is_accepted":false,"ViewCount":556,"Q_Id":63010975,"Users Score":-1,"Answer":"In my situation, although I delete all the shortcuts of UpArrow, I still can get the previous command through UpArrow in Python interactive. This means there's no way to configure this shortcut, it was built in the plugin which built in Python extension.\nSo it's some problem with your Python extension, but you said you have tried to install a different version of Python extension but still not work. Make sure you have deleted it completely -> delete the extension folder manually(it's under C:\\Users[UserName].vscode\\extensions\\ms-python.python-xxx).","Q_Score":5,"Tags":"python,visual-studio-code","A_Id":63026075,"CreationDate":"2020-07-21T08:58:00.000","Title":"Arrow up \/ previous command in VSCode Python Interactive not working","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm working with VSCode on an Ubuntu 18.04 machine. Everything is fine except that I can't get back to the previous command in Python Interactive Window via Arrow Up. It works in the integrated terminal though, integrated shell is \/bin\/bash.\nI have no idea where this is coming from. I changed \"keyboard.dispatch\" to \"keyCode\", but that's not the problem. I also tried different versions of the python-extension.\nDo you have any idea?\nThanks!","AnswerCount":2,"Available Count":2,"Score":0.0996679946,"is_accepted":false,"ViewCount":556,"Q_Id":63010975,"Users Score":1,"Answer":"Not sure if this is helpful for you as an Ubuntu user, but I came across the same problem in Windows this week. In my case, the issue cropped up after I installed the Python extension in VS Code (or at least I didn't notice the issue before this). The combination of using the Python extension, Git Bash for terminal, and python virtual environment killed the up arrow feature for me. Using python outside a virtual environment works fine. My solution was to use Command Prompt as the terminal when I wanted to use a virtual environment interactively.","Q_Score":5,"Tags":"python,visual-studio-code","A_Id":71177227,"CreationDate":"2020-07-21T08:58:00.000","Title":"Arrow up \/ previous command in VSCode Python Interactive not working","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"How can i activate AWS APPFLOW flow by not using AWS Console but by using Rest API or Python or AWS CLI?\nI am not able to find any support from AWS Documentation or any blogs.","AnswerCount":3,"Available Count":1,"Score":0.0665680765,"is_accepted":false,"ViewCount":537,"Q_Id":63013662,"Users Score":1,"Answer":"If you use CloudFormation, you can create a Lambda-backed custom resource, which is going to be triggered during CloudFormation create\/update\/delete events. The Lambda function will be called with those events, and you can call AppFlow SDK to activate\/deactivate the flows.","Q_Score":1,"Tags":"python-3.x,amazon-web-services,aws-cli,saas","A_Id":69332449,"CreationDate":"2020-07-21T11:36:00.000","Title":"AWS APPFLOW | Trigger \/ Activate AWS Appflow flow from other than console","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I'm having an issue using Python in my Mac Terminal Shell.\nI used Python through Mac Terminal yesterday, but after I worked in Pycharm this morning, there seems to be an issue with my terminal.\nNow when I simply write 'python', I receive this message:\n\nzsh: no such file or directory: \/usr\/local\/bin\/python3.7\n\nAny help, getting me back to using Python in my terminal would be appreciated!","AnswerCount":2,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":1118,"Q_Id":63015974,"Users Score":1,"Answer":"Apparently the PATH of your S.O. It can't find the file to launch Python in your terminal so you could:\n\nreinstall Python from the command line (zsh) and validate the \"python\" command again from the terminal\n\nfind the file associated with Python with commands like \"find\" and then modify the path of the PATH to the path where the Python launcher is","Q_Score":0,"Tags":"python,macos,shell,terminal,command","A_Id":63016373,"CreationDate":"2020-07-21T13:48:00.000","Title":"zsh can't find python home directory","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"tl;dr: Does Ansible have a variable containing the current Python interpreter?\nAs part of my playbook, I am creating a Python script on the controller (to be run by another command), and I want that script to be run by the Python interpreter being used by Ansible. To do this I am trying to set the interpreter in the shebang of the script.\nIf I were to set the interpreter manually, I could use the ansible_python_interpreter variable (and I have had it working that way). If I don't set the interpreter manually, then Ansible will auto-discover an interpreter, but I can no longer use the ansible_python_interpreter variable because it is not set.\nFrom looking through the documentation I have been unable to find any way to see which interpreter Ansible has auto-detected. Is there something I've missed?\n(Ansible version 2.9.10, Python 3.6)\n\nThe complete situation:\nI am running Ansible on AWX (open-source Ansible Tower), using a custom virtual environment as the runner. I use Hashicorp Vault as a secret management system, rather than keeping secrets in AWX. For access to Vault I use short-lived access tokens, which doesn't work well with AWX's built-in support for pulling secrets from Vault, so instead I do it manually (so that I can supply a Vault token at job launch time). That works well for me, generally.\nIn this particular case, I am running ansible-vault (yes, there are too many things called 'vault') on the controller to decrypt a secret. I am using the --vault-password-file argument to supply the decryption password via a script. Since the virtual env that I am using already has the hvac package installed, I wish to just use a brief Python script to pull the password from Hashicorp Vault. All works fine, except that I can't figure out how to set the shebang on this script to point at the virtual environment that Ansible is using.\nIf I can't get a useable answer to this, I suppose I can change to instead pull the password directly into Ansible and then use the --ask-vault-pass flag to pass the password that way. It just seems to me that the interpreter should really be exposed somewhere by Ansible, so I'm trying that first.","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":462,"Q_Id":63023699,"Users Score":0,"Answer":"With gather_facts: yes you should be able to get the active python using the ansible_facts.python variable.","Q_Score":5,"Tags":"python,ansible","A_Id":63025081,"CreationDate":"2020-07-21T21:57:00.000","Title":"Does Ansible expose its auto-discovered Python interpreter?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to automate some manual steps using python, i am opening new command prompt using os.popen and running docker compose up .. its opening new cmd and running the docker command, now i want run the next set of commands after docker command is up ... python script has to wait till that time, i tried with below code but its not working.\nI tried with subprocess.Popen which has wait method but its not opening new cmd,it is running in python script running command prompt only ..\np=os.popen(\"Start cmd  \/K docker-compose up\")\np.wait","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":81,"Q_Id":63033424,"Users Score":0,"Answer":"I think the \"start\" command in windows cmd runs a process that launches a child process with the rest of the line as parameter, then finishes immediately. I guess that is why it does not wait until the docker-compose finishes (or whatever command you write after \"start\").\nExample with Process IDs (PIDs):\nYour python program (PID 1) runs the command \"start cmd \/K docker-compose up\". The start process has PID 2. Start launches the \"cmd \/K docker-compose up\" (a new process with PID 3). Start finishes. Your programs waits until PID 2 ends (it already ended so continues without waiting).\nWhat you really wanted in the example is to wait until PID 3 finishes not PID 2.\nProbably you can get the real PID of the child process with some tricks and then wait until it completes but you should consider if you really need the docker-compose to run in a separate window.","Q_Score":0,"Tags":"python,python-3.x","A_Id":63034034,"CreationDate":"2020-07-22T11:45:00.000","Title":"python os.popen is not working for wait method","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have been having problems with dask.distributed. Everytime I run it, it always has memory issues and kills my workers, when running on my laptop. I have a laptop with 16GB and run 4 workers, when I try to run a computation it seems to straight away kill workers. Ive tried limiting the ram to 3.5 GB but that doesnt work. My chunk sizes are around 200MB. I am using a zarr file with a 3diim array stored. So I don't understand why I have this issue. I had it working a few months ago and took some time away from it when this problem occurred. I tired a smaller overall data set and the same issue occurs. Any thoughts?\nWhen I run this outside of distributed I don't have the same issue?\nHappy to show error reports and a minimum example if anyone has idea's?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":47,"Q_Id":63044326,"Users Score":0,"Answer":"I recommend looking at logs.  KilledWorker errors can occur for many reasons.  For example you might not have the same version of Dask everywhere or you might be launching workers someplace where they can't connect.","Q_Score":0,"Tags":"python,dask,dask-distributed","A_Id":63310776,"CreationDate":"2020-07-22T22:54:00.000","Title":"Dask.distributed kill workers Everytime I run","Data Science and Machine Learning":1,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"We have a few long running tasks (100 hours+) in a few DAGs. The tasks internally call an http endpoint to kick off a process, and then poll the status + sleep for 30 sec in a loop. After about 40 hours or so, Airflow marks the job as failed, but there is no indication in the log as to why - last item printed for the task run was a  \"Sleeping for 30 sec\" statement\". The triggered http process is also up and running.\nThanks in advance","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":763,"Q_Id":63075796,"Users Score":1,"Answer":"If your objective is to wait until a status change, use sensors with rescheduling(maybe with a larger poll wait time). Your approach might be blocking workers and somehow if the worker lost its communication with the scheduler. Those tasks will get marked as zombies and it might get killed.","Q_Score":0,"Tags":"python,airflow","A_Id":63078092,"CreationDate":"2020-07-24T14:35:00.000","Title":"Airflow marking long running tasks as Failed","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I\u2019m using the GoogleCloudStorageToBigQueryOperator to create a small table in BigQuery using a csv file in GCS. I have the airflow in a VirtualBox on my local machine. Every time, this simple operation takes 15 minutes exactly to complete. I\u2019ve tried changing from Local to Celery Executor but it still takes 15 minutes. Any suggestions please to improve the performance?\nThanks a lot,\nSri.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":61,"Q_Id":63088405,"Users Score":0,"Answer":"I've created a VM on the GCP and installed airflow on it. Moved the DAG on to it and the data got loaded within seconds.","Q_Score":0,"Tags":"python,google-cloud-platform,celery,airflow","A_Id":63123131,"CreationDate":"2020-07-25T12:38:00.000","Title":"Airflow - GCP Operator: GoogleCloudStorageToBigQueryOperator - Takes 15 minutes to complete","Data Science and Machine Learning":0,"Database and SQL":1,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I am trying to install Anaconda 3 on windows 7 (64bits).\nDuring the installation there are no error messages. It seems allright. However, I don't get Anaconda Prompt and Navigator.\nI already tried playing with environment variables and uninstall \/reinstall couple of times. Nothing works!\nI noticed that in the folder Anaconda3 there is a file _conda.exe. I also noticed there are no Scripts folder under Anaconda3.\nDespite the fact the installation reported no errors I think there is something wrong in the installation. When I type de command conda info I get:\n'conda' is not recognized as an internal or external command, operable program or batch file.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":278,"Q_Id":63090212,"Users Score":0,"Answer":"Did you try with the underscore?\n_conda.exe install -c conda-forge prompt","Q_Score":2,"Tags":"python,anaconda","A_Id":63090242,"CreationDate":"2020-07-25T15:35:00.000","Title":"Anaconda3 Installation - no error during installation, but anaconda prompt and navigator menus don't appear. And _conda.exe","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I was able to mount Azure Blob Container to my Databricks DBFS and was able to read the data as well. While writing, I was able to see the files in the mount point from within databricks, however, it does not reflect in the blob storage. Can someone help?","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":723,"Q_Id":63098954,"Users Score":0,"Answer":"Chances are that your path is incorrect.\nCheck the mounted path with dbutils.fs.mounts() and ensure it is in your saving path. Also check that your saving path starts with dbfs:\/ and not \/dbfs\/.\nDon\u2019t hesitate to share your script.","Q_Score":1,"Tags":"python,azure,azure-blob-storage,databricks,mount","A_Id":63100309,"CreationDate":"2020-07-26T10:31:00.000","Title":"Writing Data to Azure Blob Storage from Azure Databricks","Data Science and Machine Learning":1,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I want to run a python program using sudo (e.g. sudo python test.py) but within the python program when I use os.system(<some command>) to invoke other processes, I want to run them as a non-root user.\nIs this doable?\nThanks!","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":351,"Q_Id":63106523,"Users Score":0,"Answer":"Another way to do this is to add a prefix sudo -u username in front of the command one wants to run to execute as that specific user. For example, one can use os.system('sudo -u user_a python test.py') to run test.py inside a python script as user_a.","Q_Score":0,"Tags":"python,linux","A_Id":63119588,"CreationDate":"2020-07-26T22:44:00.000","Title":"invoke os.system as a non-root user in a root-user launched python program","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I wanted to use pypy to make my python scripts faster.\nI downloaded the zip file form the website and unzipped it in the C drive. I have python 3 (32bit) and Microsoft Visual C++ 2017 Redistributable(x86) installed. I've added the path to the directory containing pypy3.exe to my PATH.\nWhen I try to run a script, for example: pypy app.py I get a message saying \"'pypy' is not recognized as an internal or external command, operable program or batch file.\"\nHow can I fix this?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":1044,"Q_Id":63136294,"Users Score":2,"Answer":"You should try to use pypy3 instead of pypy if you have downloaded pypy for python 3. This can be confirmed by looking inside the unzipped folder where you can see whether you have pypy3.exe or pypy.exe.\nIf that doesn't solve your issue, you need to ensure that the folder, where you unzipped pypy, is already in windows PATH environment variable. I am assuming you are using windows 10, in command line type the following:\necho $PATH\nIf you can't pypy folder in the PATH, add it using the command line:\nsetx PATH=%PATH%;C:\\location\\of\\pypy\nwhere you need to use the location of pypy folder. For example, if location of your pypy folder is C:\\pypy, type the following command:\nsetx PATH=%PATH%;C:\\pypy\nYou may need to restart your cmd for the changes to take effect.","Q_Score":1,"Tags":"python,pypy","A_Id":63137619,"CreationDate":"2020-07-28T14:20:00.000","Title":"Trying to run file with pypy results in \"'pypy' is not recognized as an internal or external command, operable program or batch file\"","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have Windows 10 on my computer and when I use the cmd and check python --version, I get python 3.8.2. But when I try to find the path for it, I am unable to find it through searching on my PC in hidden files as well as through start menu. I don't seem to have a python 3.8 folder on my machine. Anybody have any ideas how to find it?","AnswerCount":3,"Available Count":1,"Score":0.0665680765,"is_accepted":false,"ViewCount":1375,"Q_Id":63144003,"Users Score":1,"Answer":"If you're using cmd (ie Command Prompt), and typing python works, then you can get the path for it by doing where python. It will list all the pythons it finds, but the first one is what it'll be using.","Q_Score":0,"Tags":"python,python-3.x","A_Id":63144189,"CreationDate":"2020-07-28T23:02:00.000","Title":"Cannot find Python 3.8.2 path on Windows 10","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Background :\nIn our project we are doing bulk deployment in that we are having around 10 AWS Lambda functions, Few Scala applications and few configuration files. Currently we are deploying 10 lambdas if there is no change as well.\nProblem :\nLets say we have changed code in Scala class, committed to GIT and from there using Jenkins we are deploying the changes. As we have no differentiation between Lambda and Scala changes we are deploying all the Lambdas, Scala classes and Configuration files as well.\nQuestion :\nMy question here is if we implement SAM on top of our Lambdas and then will separate it out deploying all the lambdas at a time as a separate Jenkins pipeline. If there is a change for 1 Python code in Lambda functions will it allow to deploy only delta Lambdas.","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":212,"Q_Id":63173449,"Users Score":0,"Answer":"sam deploy will only deploy resources if they have changed.  Otherwise it noops (no operation).","Q_Score":0,"Tags":"python,scala,amazon-web-services,jenkins,aws-sam","A_Id":63185227,"CreationDate":"2020-07-30T12:44:00.000","Title":"Deploying AWS Lambda using AWS SAM in Jenkins","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"Background :\nIn our project we are doing bulk deployment in that we are having around 10 AWS Lambda functions, Few Scala applications and few configuration files. Currently we are deploying 10 lambdas if there is no change as well.\nProblem :\nLets say we have changed code in Scala class, committed to GIT and from there using Jenkins we are deploying the changes. As we have no differentiation between Lambda and Scala changes we are deploying all the Lambdas, Scala classes and Configuration files as well.\nQuestion :\nMy question here is if we implement SAM on top of our Lambdas and then will separate it out deploying all the lambdas at a time as a separate Jenkins pipeline. If there is a change for 1 Python code in Lambda functions will it allow to deploy only delta Lambdas.","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":212,"Q_Id":63173449,"Users Score":0,"Answer":"You always have to deploy the entire stack using sam deploy. If some of your lambdas don't have changes, then --no-fail-on-empty-changeset will be your new friend.","Q_Score":0,"Tags":"python,scala,amazon-web-services,jenkins,aws-sam","A_Id":65644545,"CreationDate":"2020-07-30T12:44:00.000","Title":"Deploying AWS Lambda using AWS SAM in Jenkins","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"when I was going to link the oofem and yade, i have already linked liboofem to current work directory use follow command\n\nln -s current\/work\/directory\/liboofem.so oofem\/build\/directory\/liboofem.so\n\nhowever, when I was going to make the file, in a python scripts, the command \u201cimport liboofem\u201d, then raise the\n\nImportError: install\/liboofem.so: undefined symbol: gc","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":30,"Q_Id":63184569,"Users Score":0,"Answer":"cmake -DUSE_OOFEG=\"ON\" -DUSE_PYTHON_BINDINGS=\"ON\" -DCKIT_DIR=\"\/home\/shguan\/oofem\/Ckit\" -DELIXIR_DIR=\"\/home\/shguan\/oofem\/Elixir\" ..\/oofem-2.5\nshould be replaced by\ncmake -DUSE_PYTHON_BINDINGS=\"ON\" -DCKIT_DIR=\"\/home\/shguan\/oofem\/Ckit\" -DELIXIR_DIR=\"\/home\/shguan\/oofem\/Elixir\" ..\/oofem-2.5\nthat is to say the oofeg make this error!","Q_Score":0,"Tags":"python,c","A_Id":63185239,"CreationDate":"2020-07-31T01:35:00.000","Title":"ImportError: install\/liboofem.so: undefined symbol: gc","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I need my Python program to do some stuff, and at a certain point give control to the user (like a normal Python shell when you run python3 or whatever) so that he can interact with it via command line. I was thinking of using pwntools's interactive() method but I' m not sure how I would use that for the local program instead of a remote.\nHow would I do that?\nAny idea is accepted, if pwntools is not needed, even better.","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":61,"Q_Id":63194172,"Users Score":1,"Answer":"Use IPython\nIf you haven't already, add the package IPython using pip, anaconda, etc.\nAdd to your code:\nfrom IPython import embed\nThen where you want a \"breakpoint\", add:\nembed()\nI find this mode, even while coding to be very efficient.","Q_Score":0,"Tags":"python,python-3.x,pwntools","A_Id":63195407,"CreationDate":"2020-07-31T14:50:00.000","Title":"Giving interactive control of a Python program to the user","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a Python script using shutil to move files from an internal folder to any present USB drives automatically.  Even after the script closes, it seems that the OS does not always actually move the files to the USB drive until sometime later.  My research suggests the OS does this delay for wear leveling purposes, but I am not certain that's the real explanation.  Is there something I can add (ideally to my Python script or tied to it) so that the write will actually be executed immediately?  Perhaps a different way to move the file, some way to demand an immediate sync, verifying the files were really moved, or doing some follow-on action that would require the OS to truly execute the move?\nTo be clear, I am not talking about problems from pulling the USB while the write is actively happening.  The files are in total not many KB in size and I am seeing the problem even when the drive is pulled 40+ seconds later. The drives aren't blinking.  I am not seeing partial writes where some files are moved and others aren't that would suggest I'm interrupting it midway through.  Even if this was the issue, I think my question is still a valid question.\nBackground: I am running Raspbian Buster desktop version and Python 3.7.3 on a Pi4.   I want to run this Pi without keyboard or monitor so that no user intervention is required to pull the drives or put in replacement ones.  I have to run the desktop despite there being no monitor or else the Pi will not automount USB drives, but that is a separate issue.  I am a noob, so especially thorough explanations would be particularly appreciated.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":569,"Q_Id":63201971,"Users Score":1,"Answer":"As @tdelaney said in their comment, the thorough-to-the-point-of-overkill way is to call flush() on the file object, then os.fsync() on its file descriptor, which since Raspbian is based on the Linux kernel shouldn't return until the buffers are flushed.\nBut if you're using one of the shutil.copy* functions, you don't have a file object to call those on, so you can just call out to os.system(\"sync\").\nBut note that even if the kernel is dusting its hands and saying \"yup, flushed those buffers\", the data could still be working its way through the device driver internals and not yet physically written to the media. You can't get a 100% guarantee that it's all the way through unless you're manually driving the USB logic, but the next best thing is adding a command to unmount the file system.\nThe problem is that code running from the USB stick can't unmount the filesystem containing itself, so if your Python is on the stick, it can't do the unmount. You can do it manually from the command line, though. Just umount \/path\/to\/usb\/stick should do it.","Q_Score":0,"Tags":"python,raspberry-pi,raspbian,raspberry-pi4","A_Id":63217368,"CreationDate":"2020-08-01T05:03:00.000","Title":"Python on Linux: How to *immediately* move files to USB to avoid issues from OS not syncing and the USB suddenly being pulled","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Here is the situation.\nTrying to run a Python Flask API in Kubernetes hosted in Raspberry Pi cluster, nodes are running Ubuntu 20. The API is containerized into a Docker container on the Raspberry Pi control node to account for architecture differences (ARM).\nWhen the API and Mongo are ran outside K8s on the Raspberry Pi, just using Docker run command, the API works correctly; however, when the API is applied as a Deployment on Kubernetes the pod for the API fails with a CrashLoopBackoff and logs show 'standard_init_linux.go:211: exec user process caused \"exec format error\"'\nInvestigations show that the exec format error might be associated with problems related to building against different CPU architectures. However, having build the Docker image on a Raspberry Pi, and are successfully running the API on the architecture, I am unsure this could the source of the problem.\nIt has been two days and all attempts have failed. Can anyone help?","AnswerCount":1,"Available Count":1,"Score":0.3799489623,"is_accepted":false,"ViewCount":181,"Q_Id":63215868,"Users Score":2,"Answer":"Fixed; however, something doesn't seem right.\nThe Kubernetes Deployment was always deployed onto the same node. I connected to that node and ran the Docker container and it wouldn't run; the \"exec format error\" would occur. So, it looks like it was a node specific problem.\nI copied the API and Dockerfile onto the node and ran Docker build to create the image. It now runs. That does not make sense as the Docker image should have everything it needs to run.\nMaybe it's because a previous image build against x86 (the development machine) remained in that nodes Docker cache\/repository. Maybe the image on the node is not overwritten with newer images that have the same name and version number (the version number didn't increment). That would seem the case as the spin up time of the image on the remote node is fast suggesting the new image isn't copied on the remote node. That likely to be what it is.\nI will post this anyway as it might be useful.\n\nEdit: allow me to clarify some more, the root of this problem was ultimately because there was no shared image repository in the cluster. Images were being manually copied onto each RPI (running ARM64) from a laptop (not running ARM64) and this manual process caused the problem.\nAn image build on the laptop was based from a base image incompatible with ARM64; this was manually copied to all RPI's in the cluster. This caused the Exec Format error.\nBuilding the image on the RPI pulled a base image that supported ARM64; however, this build had to be done on all RPI because there was no central repository in the cluster that Kubernetes could pull newly build ARM64 compatible images to other RPI nodes in the cluster.\nSolution: a shared repository\nHope this helps.","Q_Score":1,"Tags":"python,docker,ubuntu,kubernetes,raspberry-pi","A_Id":63215869,"CreationDate":"2020-08-02T12:15:00.000","Title":"Python runs in Docker but not in Kubernetes hosted in Raspberry Pi cluster running Ubuntu 20","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a python script that starts other processes via subprocess.run(...). Usually such a process runs automatically without reading from stdin. However, in the case of an error the processes waits for user input. I want detect such a situation from the calling python script and then e.g. kill that process. How could I achieve this?\n(My idea was to create a file-like object which raises an Exception when its .read() method is called and pass it to subprocess.Popen(...) as a \"bait\" for the stdin kwarg. However this seems somehow ugly because some fileno needed to be faked.)","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":46,"Q_Id":63229997,"Users Score":0,"Answer":"You can just pass an empty file, e.g. subprocess.DEVNULL. A process which waits for standard input will get an EOF signalled if it tries reading from such a file.","Q_Score":2,"Tags":"python,subprocess,stdin,popen","A_Id":63231156,"CreationDate":"2020-08-03T13:04:00.000","Title":"Determine if a subprocess reads from stdin","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I used Pyinstaller to make a standalone portable application for windows from python code, and it works normally.\nI understand that to create an executable for a certain OS it must be done on that specific OS.\nIs there a way to create executables for other platforms directly from windows without running a virtual machine.\nThank you.","AnswerCount":4,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":2358,"Q_Id":63245946,"Users Score":0,"Answer":"In order to make executable files for Mac and Linux, you need to build it on the same systems\nFor example, in order to make your Linux work, you need to collect the rpm package","Q_Score":3,"Tags":"python,pyinstaller,executable","A_Id":63246388,"CreationDate":"2020-08-04T11:27:00.000","Title":"How to create Linux and MacOS executables using PyInstaller on Windows?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"Context:\nI currently have a Python Flask app which when receives a request, it automatically creates a Kubernetes job to run a process. Once the job finishes, it posts back the results to a specific endpoint (never changes). Depending on the specifics of the request, this process can vary greatly in length (time) and in resource requirements. The reason I'm using Jobs for this is due to their ability to restart on failure.\nProblem:\nEven with allowing maximum restarts, there will be times where the process will error. I want to implement something along the lines of:\n\nIf the job finishes successfully, do nothing.\nIf the job fails after reaching max retries, then run foo()\n\nfoo() is a very simple Python function that will send an HTTP request with the parameters of the request that resulted in the job not successfully completing. It does not have to be a Python function, but it is preferred.\nNote: I wrap everything in a broad error exception within the python function that the job needs to perform, however, there might be times that the job will fail due to insufficient memory.","AnswerCount":1,"Available Count":1,"Score":-0.1973753202,"is_accepted":false,"ViewCount":38,"Q_Id":63277074,"Users Score":-1,"Answer":"why don't implement a serveless solution in your cluster ,\nknative or kubeless or other solution.","Q_Score":0,"Tags":"python-3.x,kubernetes,kubernetes-jobs,kubernetes-python-client","A_Id":63279135,"CreationDate":"2020-08-06T04:54:00.000","Title":"Is there a way to automatically launch a followup (different) job only if a Kubernetes job fails?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"My python version is Python 2.7.17\nI usually use pip to install other modules like shutil and itertool etc. I can't find the package name for os, getopt and sys modules.\nAny help will be appreciated.\nThank you.","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":13058,"Q_Id":63282832,"Users Score":0,"Answer":"They are installed with your python as part of the standard library, if they are missing, something is wrong with your Python installation and you should reinstall it","Q_Score":1,"Tags":"python,ubuntu,pip,python-module","A_Id":63282928,"CreationDate":"2020-08-06T11:42:00.000","Title":"how to install python modules sys, os and getopt on unbuntu?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a sub-string that needs to checked against main-string , I had used FuzzyMatch Partial Ratio algorithm, but somehow, the score seems to be inappropriate\nsub string :\nAspire 1 14\nMain String:\nAcer Aspire 1 14 Inch Celeron 4GB 64GB Cloudbook - Red This sleek HD Acer Aspire 1 delivers an inviting tactile finish, featuring 4GB of RAM and an Intel Celeron Processor complete daily tasks and surf the internet seamlessly. Whilst 64GB of storage gives you enough space to easily store and share your important media and documents. #||#The classy look of the Aspire 1 is matched only by the convenience of its thin, easily portable design. #||#The Precision Touch-pad is more responsive than traditional touch-pads helping you work more effectively. #||#Model number: A114-32. #||#General features:#||#Size H1.79, W34.3, D24.5cm. #||#Weight 1.65kg. #||#Up to 10 hours battery life. #||#CPU, Memory and Operating System:#||#Intel Celeron N4000 processor. #||#Dual core processor. #||#1.1GHz processor speed with a burst speed of 2.6GHz. #||#4GB RAM DDR4. #||#64GB eMMC storage. #||#Microsoft Windows 10 S. #||#Display features:#||#14 inch screen. #||#High definition display. #||#Resolution 1366 x 768 pixels. #||#DVD optical drives:#||#Disc drive not included. #||#Graphics:#||#Intel UHD Graphics 600 graphics card. #||#Shared graphics card. #||#Interfaces and connectivity:#||#SD media card reader. #||#Secure Digital (SD), . #||#2 USB 2.0 ports. #||#1 USB 3.0 port. #||#1 Ethernet port. #||#1 HDMI port. #||#Bluetooth. #||#Wi-Fi enabled. #||#Multimedia features:#||#HD webcam. #||#Built-in mic. #||#Built-in audio sound system. #||#30 days Norton Security. #||#General information:#||#Manufacturer's 1 year guarantee. #||#EAN: 4710180446104.       Size H1.79, W34.3, D24.5cm.#||#Weight 1.65kg.#||#Up to 10 hours battery life.#||#Intel Celeron N4000 processor.#||#Dual core processor.#||#1.1GHz processor speed with a burst speed of 2.6GHz.#||#4GB RAM DDR4.#||#64GB eMMC storage.#||#Microsoft Windows 10 S.#||#14 inch screen.#||#High definition display.#||#Resolution 1366 x 768 pixels.#||#Disc drive not included.#||#Intel UHD Graphics 600 graphics card.#||#Shared graphics card.#||#SD media card reader.#||#Secure Digital (SD), .#||#2 USB 2.0 ports.#||#1 USB 3.0 port.#||#1 Ethernet port.#||#1 HDMI port.#||#Bluetooth.#||#Wi-Fi enabled.#||#HD webcam.#||#Built-in mic.#||#Built-in audio sound system.#||#30 days Norton Security.#||#Manufacturer's 1 year guarantee.#||#EAN: 4710180446104.\nExpected score is 100 but got only 55\nAny suggestions are welcomed! Thanks in advance!\nHeading","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":58,"Q_Id":63286322,"Users Score":0,"Answer":"Figured out that if either of strings length (# of characters) crosses threshold value, partial_ratio sets Sequence Matcher to be false and the scores are not 100% even if there is a partial string match","Q_Score":0,"Tags":"python,string,string-comparison,fuzzywuzzy","A_Id":63450825,"CreationDate":"2020-08-06T14:56:00.000","Title":"FuzzyWuzzy partial_ratio string match","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I've compiled an app using python, js, html and css (using eel to link them). It's all working but when I load the exe that is compiled, it opens the app logo, bounces up and down (as apps do on Macs when loading) then the logo disappears, and then the app opens after about 8 seconds from google chrome.\nIs this normal for Pyinstaller executables i.e. opening from chrome, or is there something in my code? If so, leave a comment and I will update this question with relevant snippets of my code!\nThanks","AnswerCount":2,"Available Count":2,"Score":0.0,"is_accepted":false,"ViewCount":127,"Q_Id":63294222,"Users Score":0,"Answer":"is it possible that while compiling your app with Pyinstaller, you used --onefile? If this is the case, try compiling again without this command and see if the problem still persists.\nfrom the Pyinstaller docs:\n\n... the single executable is a little slower to start up than the\none-folder bundle.\nBefore you attempt to bundle to one file, make sure your app works\ncorrectly when bundled to one folder. It is is much easier to diagnose\nproblems in one-folder mode.","Q_Score":0,"Tags":"javascript,python,html,python-3.x,pyinstaller","A_Id":63315352,"CreationDate":"2020-08-07T02:11:00.000","Title":"Why does Pyinstaller exe open and close then open again?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":1,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I've compiled an app using python, js, html and css (using eel to link them). It's all working but when I load the exe that is compiled, it opens the app logo, bounces up and down (as apps do on Macs when loading) then the logo disappears, and then the app opens after about 8 seconds from google chrome.\nIs this normal for Pyinstaller executables i.e. opening from chrome, or is there something in my code? If so, leave a comment and I will update this question with relevant snippets of my code!\nThanks","AnswerCount":2,"Available Count":2,"Score":1.2,"is_accepted":true,"ViewCount":127,"Q_Id":63294222,"Users Score":1,"Answer":"I've made a work around and am posting it as the answer to this question incase someone has a similar issue in the future.\nAfter doing research I found that PyInstaller is simply just slow in most cases where there is a larger python file i.e. machine learning. There were also other issues with integrating PyInstaller and JS\/HTML\/CSS, where you have to use Eel to communicate between the documents, and subsequently, every desktop\/web application you make will have to involve google chrome.\nSOLUTION:\nAs an alternative to building the desktop application via PyInstaller, I am building it using Blazor\/Electron. There is no direct link between Blazor\/Electron and Python, as Blazor relies on C#, JS\/HTMLCS. Therefore, I ported in IronPython into my C# file, this allows me to communicate along the following path. C# -> Python -> C# -> JS\/HTML\/CSS. An additional advantage to Blazor\/Electron is that the application can be built as a local desktop application without internet connection, and it boots up much faster. Lastly, C# allows for building Splash Screens (loading screen while the app boots up for the first time) for your application, so even if you're app is huge and it has a long load time, the user can be informed that the desktop app is loading!","Q_Score":0,"Tags":"javascript,python,html,python-3.x,pyinstaller","A_Id":63315595,"CreationDate":"2020-08-07T02:11:00.000","Title":"Why does Pyinstaller exe open and close then open again?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":1,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm facing a very strange error while deploying a DAG into a Composer Airflow environment.\nI have created a custom operator with the following import:\nfrom exchangelib import DELEGATE, Account, Credentials, Message, FileAttachment, HTMLBody\nThe custom operator is defined in a file named airflow_mail_operator.py and the DAG is defined in a file named test_main.py.\nThe error I get is from the airflow webserver and states ModuleNotFoundError: No module named 'exchangelib' even if the Composer environment already presents this library.\nThe error stops showing if I add the import statement even in the DAG file, and this sounds really strange to me!\nFollowing the full stacktrace:\nTraceback (most recent call last): File \"\/usr\/local\/lib\/airflow\/airflow\/models\/dagbag.py\", line 243, in process_file m = imp.load_source(mod_name, filepath) File \"\/opt\/python3.6\/lib\/python3.6\/imp.py\", line 172, in load_source module = _load(spec) File \"<frozen importlib._bootstrap>\", line 684, in _load File \"<frozen importlib._bootstrap>\", line 665, in _load_unlocked File \"<frozen importlib._bootstrap_external>\", line 678, in exec_module File \"<frozen importlib._bootstrap>\", line 219, in _call_with_frames_removed File \"\/home\/airflow\/gcs\/dags\/dg_dags\/test_main.py\", line 5, in <module> from dg_dags.airflow_mail_operator import CustomEmailOperator File \"\/home\/airflow\/gcs\/dags\/dg_dags\/airflow_mail_operator.py\", line 5, in <module> from exchangelib import DELEGATE, Account, Credentials, Message, FileAttachment, HTMLBody ModuleNotFoundError: No module named 'exchangelib'\nHave someone evere faced (and maybe resolved) a similar error?\nMy environment is:\ncomposer-1.10.0-airflow-1.10.6\npython3\nThanks in advance!","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":439,"Q_Id":63300146,"Users Score":0,"Answer":"The solution for me was to force an update on Composer cluster by updating the underlying k8s cluster!","Q_Score":1,"Tags":"python,airflow,directed-acyclic-graphs,google-cloud-composer","A_Id":71763383,"CreationDate":"2020-08-07T10:40:00.000","Title":"Composer Airflow - No module named \"exchangelib\"","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"after I type python\nthe SSH goes run python in command line. How to exit? I want to type new \"SUDO\" command but i can't exit python \"mode\".","AnswerCount":5,"Available Count":3,"Score":0.0798297691,"is_accepted":false,"ViewCount":1723,"Q_Id":63309189,"Users Score":2,"Answer":"Just use exit(). It will exit python.","Q_Score":1,"Tags":"python,command-line,read-eval-print-loop","A_Id":63309205,"CreationDate":"2020-08-07T21:10:00.000","Title":"How to go back to command line","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"after I type python\nthe SSH goes run python in command line. How to exit? I want to type new \"SUDO\" command but i can't exit python \"mode\".","AnswerCount":5,"Available Count":3,"Score":0.1194272985,"is_accepted":false,"ViewCount":1723,"Q_Id":63309189,"Users Score":3,"Answer":"Give the console exit() should work.","Q_Score":1,"Tags":"python,command-line,read-eval-print-loop","A_Id":63309214,"CreationDate":"2020-08-07T21:10:00.000","Title":"How to go back to command line","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"after I type python\nthe SSH goes run python in command line. How to exit? I want to type new \"SUDO\" command but i can't exit python \"mode\".","AnswerCount":5,"Available Count":3,"Score":1.2,"is_accepted":true,"ViewCount":1723,"Q_Id":63309189,"Users Score":3,"Answer":"You can press Ctrl + D or type exit() in console to be able to exit Python's shell.","Q_Score":1,"Tags":"python,command-line,read-eval-print-loop","A_Id":63309212,"CreationDate":"2020-08-07T21:10:00.000","Title":"How to go back to command line","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Hi I'm trying to read an environment variable in python, if I execute my script from console with:\npython3 myScript.py everything goes ok, but I need to run this script as a service in Ubuntu, in this case, the script can't get the environment variable. Anyone has past for the same issue? I noticed that when i'm trying to read the mongo URI from environment.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":23,"Q_Id":63321231,"Users Score":0,"Answer":"The correct way to achieve that is passing the environment variable or environment file to the service file, in my case I added this line to my service file:\nEnvironmentFile = \/etc\/environment","Q_Score":0,"Tags":"python-3.x,ubuntu,service,environment-variables","A_Id":63321266,"CreationDate":"2020-08-08T23:50:00.000","Title":"Issue tying to read environment variable in Python","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am very new to Mongo engine and currently I have mongo query filter that is working in mongo shell but I wanted to achieve the same in Mongoengine , can you please help me\nMongo Shell Query\n{name:{$nin:[\/ja\/,\/ra\/]}}\nbut same is not working with Mongoengine\nnamelist = NameRecord.objects(name__nin=['\/ja\/','\/ra\/'])\nThanks in advance","AnswerCount":2,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":133,"Q_Id":63325358,"Users Score":2,"Answer":"First of all I would like to thank @tom-slabbaert for pointing me the what was wrong , as he pointed the issue was with regex of python and finally with his input I am able to find the solution, in fact all credits goes to him just I am adding answer so it will be helpful any others in future\nnamelist = NameRecord.objects(name__nin=[re.compile(r\"ja\"), re.compile(r\"ra\")])","Q_Score":1,"Tags":"python,mongodb,flask,mongoengine","A_Id":63327139,"CreationDate":"2020-08-09T10:50:00.000","Title":"Python Mongoengine with $nin with pattern","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"Few year ago I created a proxy script with python and Flask. It only run up app and bypass a request to the direction and added \"response.headers['Access-Control-Allow-Origin'] = '*'\" to avoid CORS calls between server.\nWhen I installed ubuntu 18.04, the only way to install python environment with \"flask\" and \"request\" libraries was to create a \"venv\" environment. I can't install directly in ubuntu with pip. So, I did it and I create my virtual environment for flask.\nMy problem is after all already succesfull, I run venv \"source venv\/bin\/activate\" and then launch my scrpipt \"python3 server.py\". Everything went well, but when I close the ssh connection \"venv\" is down also. I tried run with with \"python3 server.py &\" but the same.\nHow can I make \"venv\" virtual environment permanent, not to go down after exit the ssh connection?\nThanks! :)","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":210,"Q_Id":63336243,"Users Score":0,"Answer":"SOLVED!\nI was installing everything for python2. I installed sudo apt install python3-pip, and then install all needed libraries with python3 and I could run up without venv environment","Q_Score":0,"Tags":"python,python-venv","A_Id":63336332,"CreationDate":"2020-08-10T07:57:00.000","Title":"Make python3 venv permanent after ssh termina close","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I am trying to install cython using\nPy setup.py install\nsource. But the pgen executable is not found","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":38,"Q_Id":63345551,"Users Score":0,"Answer":"Solved using\npip install Cython-0.29.21.tar.gz --install-option=\"--no-cython-compile\"","Q_Score":0,"Tags":"python-3.x","A_Id":63357994,"CreationDate":"2020-08-10T17:57:00.000","Title":"Pgen module not found during cython installation","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have the following problem:\nI have a folder with files.\nI want to write into those files their respective file path + filename (home\/text.txt) .\nHow can I achieve this in python?\nThanks in advance for your time and help!","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":1440,"Q_Id":63349411,"Users Score":0,"Answer":"with open('FOLDER_NAME\/FILE_NAME','w+') as f:\nAssuming the python file is in the same path as the folder.\nYou can use:\n..\nto move back a directory.","Q_Score":1,"Tags":"python,file,path","A_Id":63349450,"CreationDate":"2020-08-10T23:27:00.000","Title":"Python Write File Path into Files","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have Energy Meter connected through RTU and i am able to get holding registers data through simple RTU Code.\nNow i want to make Convert this RTU to TCP through Forwarder. I want to send data to TCP which forwards the command to RTU and fetches data of RTU connected device for me.\nI have implement the Forwarder code just dont know how to fetch the holding register of RTU through it.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":88,"Q_Id":63356967,"Users Score":0,"Answer":"If you are working with real device, make sure you are explicitly initialising the remote slave context with the unit Id.\ncontext = RemoteSlaveContext(serial_client, unit=<unit-id-of-slave>)\nThe default is 0 which works fine with simulated slaves but would be considered as a broadcast address with the real devices generally and no response would be returned back.","Q_Score":0,"Tags":"python,python-3.x,pymodbus,pymodbus3","A_Id":63386969,"CreationDate":"2020-08-11T11:12:00.000","Title":"Read RTU Pymodbus data through TCP\/Forwarder","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I need to use Python3.7 for a project, but Ubuntu 20.04 doesn't have python3.7-dev in the apt repositories. I've installed Python3.7 from a tarball, but it doesn't install the headers. I noticed in the build directory that libpython3.7m.a exists, but I'm looking for libpython3.7.so. I don't see any options to build shared versus static library, and I don't where that file goes, I was hoping the build script would take care of that.\nDoes anyone know the recommended way to install python headers from older versions?","AnswerCount":3,"Available Count":1,"Score":-0.1325487884,"is_accepted":false,"ViewCount":14222,"Q_Id":63369951,"Users Score":-2,"Answer":"maybe you can use libpython3.7m-pic.a instead, which acts like libpython3.7.so to some extent","Q_Score":4,"Tags":"python,python-3.7,ubuntu-20.04","A_Id":66524988,"CreationDate":"2020-08-12T04:48:00.000","Title":"How to install python3.7-dev on Ubuntu 20.04?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have to download .parqeat file from Azure storage and have to analyze the Data.\nSo I started using python codes with azure-storage-blob library and Pandas to store DataFrames and flask to create API on response.\nBut now file size in the Azure storage is getting increased up to 30MB(a day file) and as tested it takes 6min to download 20MB file into my local which I can't afford because I have to analyse files of each days in a month, which will have 20 MB each. That's almost 3020MB size.\nAny suggestion?","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":43,"Q_Id":63376871,"Users Score":0,"Answer":"Did you find your answer? Without a code snippet it would be hard to diagnos your problem. Azure Blob Storage supports read in parallel. If you have BatchServiceClient service that would be straightforward. Otherwise, try Multiprocessing module. Kr.","Q_Score":0,"Tags":"python,azure,blob,azure-storage,data-analysis","A_Id":65569711,"CreationDate":"2020-08-12T12:48:00.000","Title":"Python: azure-storage-blob takes 6 min to download a 20MB file to local","Data Science and Machine Learning":1,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am trying to stream Elasticsearch data into Snowflake. I am testing a python script which ultimately will be deployed as a cloud function\/docker app on AWS. For historical I am using the scroll API to write x amount of objects into a string and the string to a file. I've used Snowflake's PUT file:\/\/file.json.gz @stage but that implies I need to write the file temporary to disk before storing on a stage. I have an insanely large amount of data to pull and am trying to eliminate as many steps as possible. Is there a cheeky way I can write files to the stage directly?","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":139,"Q_Id":63378402,"Users Score":1,"Answer":"If you create a Snowflake Stage linked to an S3 when you save to your S3, with whatever you decide to use, it will be automatically on your Snowflake Stage, this way, you can just send a COPY INTO command and save a step or two.\nIn my opinion, it's a simple and handy solution.\nif you need the steps, let me know and I'll be glad to post those here.","Q_Score":0,"Tags":"python,elasticsearch,snowflake-cloud-data-platform","A_Id":63386935,"CreationDate":"2020-08-12T14:12:00.000","Title":"Can you write JSON to Snowflake stage?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"Is it possible to only save celery results on specific parameters, such as a failed task?\nI have been looking but the only way I could manage was to go back through the celery results backend and parse through the data outside of celery.\nIs there a better way?\n(Note: I am using mongodb as a celery result backend.)","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":174,"Q_Id":63379799,"Users Score":1,"Answer":"Not that I know of (do not take my words for granted). If you specify result backend, it will be used for all tasks both successful and unsuccessful that do not ignore results.","Q_Score":0,"Tags":"python-3.x,celery,celery-task","A_Id":63393194,"CreationDate":"2020-08-12T15:26:00.000","Title":"Only store results of \"failed\" celery tasks (Celery Result backend)","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"So for a little context. In linux the \"ifconfig\" command is actually executing a \"ifcfg-eth0\" file found \"\/etc\/sysconfig\/network-scripts.\"\nIn windows, do command line (or powershell) commands correspond to a specific file? If so where? If it exists I having a hard time finding it.\nReason:\nI am trying to execute commands from a program I am writing in Python. I know there are other ways to accomplish this ie. \"import os, import subproccess.\" I am trying to brainstorm a simpler way to execute these commands before my program gets to heavy.\nBasically I would like to tell python to execute a file ie. \"ifcfg-eth0\" in linux but in windows. Also, I'm just using \"ipconfig\" as an example There are a lot of commands I want to add.","AnswerCount":2,"Available Count":1,"Score":-0.0996679946,"is_accepted":false,"ViewCount":169,"Q_Id":63395320,"Users Score":-1,"Answer":"Usually cmd commands are located in system32.\nThere's an executable ipconfig.exe in C:\\Windows\\system32","Q_Score":0,"Tags":"python,linux,windows,powershell,command","A_Id":63395404,"CreationDate":"2020-08-13T12:37:00.000","Title":"Is there a way to reference an \"ipconfig\" file in Windows","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am on Windows 10.\nI installed the \"pylint\" package with the command pip install pylint --user and it successfully got installed.\nBut when I try to run the command in command prompt,I am getting the  'pylint' is not recognized as an internal or external command, operable program or batch file.\nI checked the path and it is installed with all the other python packages.How do I solve this?","AnswerCount":2,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":5514,"Q_Id":63417397,"Users Score":0,"Answer":"Found a way to make it work\n\nsearch for \"edit the system environment variables\" in search.\nclick environment variables.\nunder \"system variables\" click \"path\" and click edit.\nclick \"new\".\ngo back and copy the path where python package(pylint) is installed and paste it there.\nclick ok everything.\ncheck now it works...","Q_Score":4,"Tags":"python,pip,command-prompt,pylint","A_Id":64483715,"CreationDate":"2020-08-14T17:24:00.000","Title":"'pylint' is not recognized as an internal or external command, operable program or batch file","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am working on building a movie recommendation engine on aws sagemaker environment and i plan to show working demonstration for the same. I am trying to use the streamlit library for running the app.\nAfter running the command: streamlit run app.py, it provides me 2 urls i.e. Network and External urls.\nThe issues is none of the url works. It results in connection timed out, the server does not respond.\nPlease help","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":557,"Q_Id":63427965,"Users Score":0,"Answer":"You can try the following url https:\/\/{NOTEBOOK_URL}\/proxy\/8501\/. You may have to change the proxy based on which proxy is used in the Network and External urls","Q_Score":2,"Tags":"python,user-interface,jupyter,amazon-sagemaker,streamlit","A_Id":65145807,"CreationDate":"2020-08-15T15:48:00.000","Title":"Streamlit Browser App does not open from Sagemaker Terminal","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":1,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":1},{"Question":"I\u2019m looking to essentially use two devices: raspberry pi 3 and Mac 10.15. I am using the pi to capture video from my web cam and I want to use my Mac to kind of extend to the pi so when I use cv2.videocapture I can capture that same video in preferably real-time or something close. I\u2019m programming this using python on bout devices. I thought of putting it on a local server and retrieving it but I have no idea how I could use that with opencv. If someone could provide and explain a useful example, I would greatly appreciate it. Thank you.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":29,"Q_Id":63433319,"Users Score":0,"Answer":"To transfer a video stream, you could use instead of a custom solution a RTMP server on the source machine feeding it with the cam source and the target opens the stream and processes it.\nA similar approach to mine is widely implemented into IP cameras: They run a RTMP server to make the stream available for phones and PC.","Q_Score":0,"Tags":"python-3.x,opencv,raspberry-pi3","A_Id":63433404,"CreationDate":"2020-08-16T04:59:00.000","Title":"Play video from one device to another","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I intend to have a program detect when a login failure occurs. I intend to use this program on mac, in case that is important. Could this solution detect how many login failures occur, or would I use a variable to determine how many have occurred?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":69,"Q_Id":63439810,"Users Score":0,"Answer":"As mentioned by @JaniniRami, you can scrape the data from the macOS logs located in \/var\/log\/asl.log (except for macOS High Sierra), and see if there were any authentication failures in the log (such as warnings or errors)","Q_Score":0,"Tags":"python,macos,authentication","A_Id":63440166,"CreationDate":"2020-08-16T17:14:00.000","Title":"How to detect a user login failure on a mac?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"For some reason, I cannot get pyinstaller to work.\nI did:\npip install pyinstaller\nand then did:\npyinstaller in terminal\nthis is the error I got\n'pyinstaller' is not recognized as an internal or external command operable program or batch file.\nHow do I fix this?\nI am using:\n\nPython 3.8 (From Microsoft Store)\nPyinstaller 4.0\n\nThanks in advance","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":253,"Q_Id":63453324,"Users Score":0,"Answer":"I looked at the reviews on python 3.8 in MS store, a reviewer said pyinstaller isn't working for them. So idk if it may be the type of python.exe that I am using or my windows machine is a little restrictive.\nI also heard pyinstaller has errors with 3.5+ and works better with python 2.7","Q_Score":0,"Tags":"python,exe,pyinstaller","A_Id":63475653,"CreationDate":"2020-08-17T14:50:00.000","Title":"How do I get pyinstaller to work correctly to convert my files?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am having a hard time understanding how to refractor already written python scripts into celery. What needs to be changed in the script? I can't find any tutorials on the subject.","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":36,"Q_Id":63455718,"Users Score":1,"Answer":"My advice - use logic. You notice all examples in Celery documentation contain some sort of task, which is typically a Python function (it can be a class too but I see that rarely). So the first thing you should think about is how to wrap your existing code in such a way that it becomes a call to a function with relevant parameters. Once you have that function, decorate it into a Celery task, and you are good to go.","Q_Score":0,"Tags":"python,redis,celery,scheduled-tasks,flower","A_Id":63464764,"CreationDate":"2020-08-17T17:22:00.000","Title":"How to implement already written python scripts into Celery","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have a python program that reads in a file of names, sorts them alphabetically and then outputs a new sorted text file. I would like to make this into an excuteable so that it works on both Mac and Windows. I tried using pyinstaller\npip install pyinstall\npyinstaller --onefile file_name.py\nIt output an excuteable that worked on my mac. When I put the executeable on my wife's windows, it didn't work.","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":33,"Q_Id":63459187,"Users Score":0,"Answer":"For python, an executable only works on the OS for which it was made. If you want to use it on Windows, create it in a computer with Windows, for Mac, create it in a Mac computer.","Q_Score":0,"Tags":"python,windows,macos,executable","A_Id":63459261,"CreationDate":"2020-08-17T21:58:00.000","Title":"Create executeable for all platforms","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I had Anaconda and conda installed on my machine before, but deleted the .bash_profile conda script in my ~\/.bash_profile. Then, I deleted the anaconda navigator, and the entire anaconda3 directory from \/opt\/anaconda3.\nThen installed the anaconda navigator and conda again, but they came with python 3.8 installed. I wanted to downgrade Python to 3.7.4, so I run the following command: (in the base env) conda install python=3.7.4.\nIt has been stuck in Solving Environment for about 10 minutes or so, and I don't know what to do.","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":7405,"Q_Id":63466861,"Users Score":0,"Answer":"I had similar problem in Anaconda 4.10.3 and was fixed by creating a new environment, as suggested by @Paul H. Thanks.","Q_Score":2,"Tags":"python,anaconda,conda","A_Id":69503704,"CreationDate":"2020-08-18T10:37:00.000","Title":"Conda install taking too long","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"We have Azure Kubernetes clusters running (one per stage on DEV, TST, PRD) where we need several Python scripts to run periodically, which is what we are using APScheduler (3.6.0) for. The default in-memory jobstore is used.\nSome days ago, however, I found out that APScheduler is behaving different than expected. It happens on all three stages:\n\nA specific job, which is set to run at minute 0 and minute 30 every hour, has stopped running between 21:30 and 00:00 since March 27, 2020.\nThis same job runs at weird times, e.g. at ~:15 and :45, frequently.\nJobs are getting skipped whilst they are scheduled to run every 5 minutes. The logging says 'Launching job', but then does not state the following, which it should: Job \"x_job (trigger: cron[month='', day='', day_of_week='', hour='', minute='0,5,10,15,20,25,30,35,40,45,50,55'], next run at: 2020-08-18 10:35:00 UTC)\" executed successfully. It occurs that at some point, two runs are triggered at the same time but not necessarily the next run.\n\nSteps undertaken but not with desired result:\nIncrease the number of process_pool_workers and thread_pool_max_workers and set misfire_grace_time:\nExecutor\nthread_pool_max_workers: 50\nprocess_pool_max_workers: 20\nJob defaults\njob_defaults_coalesce: True\njob_defaults_max_instances: 3\nmisfire_grace_time: 120\n\nSet timezone='UTC' for scheduler and in the add_jobs.\nscheduler = BlockingScheduler(executors=executors, job_defaults=job_defaults, timezone='UTC')\nscheduler.add_job(launch_profile_job, CronTrigger.from_crontab(scheduler_config.profile_job), timezone='UTC')\n\nI also have checked the resources of the cluster, but CPU and memory of the scheduler are not even close to their limits. We also have quite a low avg. active pod count of 25, and even it this would become an issue to our K8s cluster, autoscaling is enabled.\nDoes anyone here have a clue what might be going on?","AnswerCount":1,"Available Count":1,"Score":0.1973753202,"is_accepted":false,"ViewCount":498,"Q_Id":63467197,"Users Score":1,"Answer":"Don't use in-memory job store instead go for persistence stores like Redis, mongo etc.,\nIf you need your jobs to persist over scheduler restarts or application crashes, you've to choose the persistence job stores.\nAPscheduler supports the following persistence job stores.\n\nSQLAlchemy\nMongoDB\nRedis\nRethinkDB\nZooKeeper","Q_Score":1,"Tags":"python,azure,docker,kubernetes,apscheduler","A_Id":63871502,"CreationDate":"2020-08-18T10:59:00.000","Title":"APScheduler skips jobs and runs at other times","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"After updating macOS to Catalina, I can no longer import modules like Pandas, Numpy or Scipy--I get a ModuleNotFoundError. Interestingly, import os and import sys do not throw this error.\nDoes anyone know why this is and how to fix it?\nThanks","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":144,"Q_Id":63468915,"Users Score":0,"Answer":"Probably after update you have another default Python interpreter.\nYou either should find where \"the old one\" is located or install again all libraries needed (e.g. pip install pandas)","Q_Score":1,"Tags":"python-3.x,macos,python-import,python-module,macos-catalina","A_Id":63469530,"CreationDate":"2020-08-18T12:44:00.000","Title":"Python modules not working after macOS Catalina update","Data Science and Machine Learning":1,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I want to install PySyft via pip on a Jetson TX2.\nUnfortunately, I have a big problem with the dependencies here and the Jetson TX2. As an example, I want to change the dependency torch==1.4.0 to torch>=1.4.0 or torch==1.6.0 because I can't install another torch version for the Jetson.\nI have already tried the following:\npython3 -m pip download -w syft==0.2.3a1 --no-deps\nand get a syft-0.2.3a1-py3-none-any.whl which I can unzip and read out the dependencies via the METADATA.\nCan I change it now as described above and build a *.whl again to install it using pip afterwards?","AnswerCount":2,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":282,"Q_Id":63469539,"Users Score":0,"Answer":"Just... modify the extracted METADATA, recompress into a zip and rename to the same name as the original wheel?\nWhile you're at it, you may want to increment or change the version of the modified package.","Q_Score":0,"Tags":"python,installation,pip,pysyft","A_Id":63469698,"CreationDate":"2020-08-18T13:19:00.000","Title":"How can I download a pip whl, change the version of dependencies and build a whl file again to install it with pip?","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I'm using PyCharm to do some kinds of stuff on ESP32,\nIt's ongoing, but I can't use the terminal correctly. MicroPython REPL doesn't seem to work. I can't do serial commands on the terminal.\nI'm using a venv to do it, and maybe the problem is something related to it.\nIn normal cases, this is the terminal:\nDevice path COM[x]\nQuit: Ctrl+] | stop program: Ctrl+C | Reset: Ctrl+D\n\n\n\n\n\n\n...\nIn my case, it's like this:\nMicrosoft Windows [vers\u00e3o 10.0.18363.1016]\n(c) 2019 Microsoft Corporation. Todos os direitos reservados.\n(venv) C:\\Users\\user\\PycharmProjects\\networktest>\n...\nSo I can't do any command in my terminal, anyone can help?","AnswerCount":1,"Available Count":1,"Score":1.2,"is_accepted":true,"ViewCount":80,"Q_Id":63493768,"Users Score":0,"Answer":"Have you tried using a Terminal program like PuTTY, using the com port identified for the ESP32 to establish a REPL?\nCan you see the board\/com port in Device Manager or as a drive in  Windows Explorer?\nThese steps might help isolate the problem to either Pycharm, or the board itself?","Q_Score":0,"Tags":"terminal,pycharm,esp32,micropython,esptool","A_Id":63496872,"CreationDate":"2020-08-19T19:30:00.000","Title":"Terminal issue, MicroPythonREPL","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0},{"Question":"I am developing module for web server. In one of my php modules I am using system($command, $response) call in order to execute python script, but I get response \"1\" which means \"operation not permitted\". I did the following actions in order to solve this problem, but nothing helped:\n\nchmod 777 for every php file in execution pipeline and chmod 777 for executed my_python_script.py.\nchown my_server_daemon for my_python_script.py.\n\nA little more useful information for case understanding:\n\nServer system: Linux 2.6.32-042stab141.3 x86_64 GNU\/Linux\nPython file was written on Win10, but line ending were changed using dos2unix my_python_script.py\n\nDo you have any ideas how to solve this problem? Everything works fine, when I execute script manually in terminal, but fails, when I try to do this using PHP system().","AnswerCount":1,"Available Count":1,"Score":0.0,"is_accepted":false,"ViewCount":27,"Q_Id":63496747,"Users Score":0,"Answer":"The question is closed. It's really stupid, I didn't pay attention that my_python_script.py works with external .txt file, which hadn't write permission for other users. Be careful :)","Q_Score":0,"Tags":"php,python-3.x,linux,permissions,webserver","A_Id":63497225,"CreationDate":"2020-08-20T00:31:00.000","Title":"Can't execute python script via system() call in PHP","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":1,"Python Basics and Environment":0,"System Administration and DevOps":1,"Web Development":0},{"Question":"I have the folder \/a\/b\/c\/d\/ and I want to copy d\/ into destination \/dst\/.\nHowever, shutil.copytree(\"\/a\/b\/c\/d\", \"\/dst\") produces \/dst\/a\/b\/c\/d.\nI only want \/dst, or even \/dst\/d would suffice, but I don't want all the intermediate folders.\n[edit]\nAs others have noted, copytree does what I want - I had unintentionally added the full path of the source to my destination!","AnswerCount":2,"Available Count":1,"Score":0.0996679946,"is_accepted":false,"ViewCount":66,"Q_Id":63508810,"Users Score":1,"Answer":"that is what shutil.copytree does !\nshutil.copytree recursively copies an entire directory tree rooted at src to a directory named dst\nso the statement in the question :\nshutil.copytree(\"\/a\/b\/c\/d\", \"\/dst\") produces \/dst\/a\/b\/c\/d.\nis just wrong.this will copy the contents of d (and subdirectories) in to \/dst","Q_Score":0,"Tags":"python-3.x,copytree","A_Id":63509261,"CreationDate":"2020-08-20T15:52:00.000","Title":"copy subfolder without parent folders","Data Science and Machine Learning":0,"Database and SQL":0,"GUI and Desktop Applications":0,"Networking and APIs":0,"Other":0,"Python Basics and Environment":1,"System Administration and DevOps":1,"Web Development":0}]