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AhmedSSoliman

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dropping a single (sub-) column from a multiindex

df.drop('a', level=1, axis=1)

creating list of random numbers in python

print('{.5f}'.format(randomList[index]))

python: how to build a dict from plain list of keys and values

dict(zip(i, i))

how to decode url to path in python, django

urllib.parse.unquote(url)

can i extend within a list of lists in python?

[[1, 100313, 0, 0, 1], [2, 100313, 0, 0, 1], [1, 100314, 0, 1, 0], [3, 100315]]

select all rows in dataframe `df` where the values of column 'columnx' is bigger than or equal to `x` and smaller than or equal to `y`

df[(x <= df['columnX']) & (df['columnX'] <= y)]

how to exclude a character from a regex group?

re.compile('[^a-zA-Z0-9-]+')

permanently set the current directory to the 'c:/users/name/desktop'

os.chdir('C:/Users/Name/Desktop')

display a grayscale image from array of pixels `imagearray`

imshow(imageArray, cmap='Greys_r')

how does a descriptor with __set__ but without __get__ work?

myinst.__dict__['attr']

organizing list of tuples

[(1, 4), (4, 8), (8, 10)]

how can i print over the current line in a command line application?

sys.stdout.flush()

how can i make a scatter plot colored by density in matplotlib?

plt.scatter(np.random.randn(100), np.random.randn(100), facecolors='none')

how do you convert yyyy-mm-ddthh:mm:ss.000z time format to mm/dd/yyyy time format in python?

print(d.strftime('%m/%d/%Y'))

sending a mail from flask-mail (smtpsenderrefused 530)

app.config['MAIL_SERVER'] = 'smtp.gmail.com'

display a decimal in scientific notation

"""{:.2E}""".format(Decimal('40800000000.00000000000000'))

convert a list to a dictionary in python

b = {a[i]: a[i + 1] for i in range(0, len(a), 2)}

how to sort a dataframe in python pandas by two or more columns?

df.sort_values(['a', 'b'], ascending=[True, False])

how can i exit fullscreen mode in pygame?

pygame.display.set_mode(size, FULLSCREEN)

python pickle/unpickle a list to/from a file 'afile'

pickle.load(open('afile', 'rb'))

replace the single quote (') character from a string

"""""".join([c for c in string if c != "'"])

how to convert hex string to integer in python?

int('0x000000001', 16)

writing nicely formatted text in python

f.write('%-40s %6s %10s %2s\n' % (filename, type, size, modified))

how to write a python script that can communicate with the input and output of a swift executable?

process.stdin.flush()

get a list of last trailing words from another list of strings`original_list`

new_list = [x.split()[-1] for x in Original_List]

python: convert unicode string to mm/dd/yyyy

datetime.datetime.strptime('Mar232012', '%b%d%Y').strftime('%m/%d/%Y')

display a image file `pathtofile`

Image.open('pathToFile').show()

how do i save data from a modelform to database in django?

obj.save()

is it possible to add a string as a legend item in matplotlib

plt.show()

extracting first n columns of a numpy matrix

a[:, :2]

python - converting hex to int/char

[ord(c) for c in s.decode('hex')]

how to call a function from another file?

print(function())

check if string contains a certain amount of words of another string

print([(s, s in st1) for s in re.findall(pat, st2)])

saving dictionary whose keys are tuples with json, python

json.dumps({str(k): v for k, v in data.items()})

row-wise indexing in numpy

i = np.array([[0], [1]])

pytz - converting utc and timezone to local time

pytz.utc.localize(utc_time, is_dst=None).astimezone(tz)

how to use regular expression to separate numbers and characters in strings like "30m1000n20m"

re.findall('([0-9]+)([A-Z])', '20M10000N80M')

get random sample from list while maintaining ordering of items?

rand_smpl = [mylist[i] for i in sorted(random.sample(range(len(mylist)), 4))]

python regular expression match whole word

re.search('\\bis\\b', your_string)

named tuples in a list

a = [mynamedtuple(*el) for el in a]

how to modify a variable inside a lambda function?

myFunc(lambda a, b: iadd(a, b))

create a list that contain each line of a file

my_list = [line.split(',') for line in open('filename.txt')]

how to serve static files in flask

app.run()

no minor grid lines on the x-axis only

axes.xaxis.grid(False, which='minor')

get a list of indices of non zero elements in a list `a`

[i for i, e in enumerate(a) if e != 0]

how can i send variables to jinja template from a flask decorator?

return render_template('template.html')

regex punctuation split [python]

re.split('\\W+', 'Words, words, words.')

how to convert an ordereddict into a regular dict in python3

dict(OrderedDict([('method', 'constant'), ('data', '1.225')]))

how to use one app to satisfy multiple urls in django

urlpatterns = patterns('', ('', include('myapp.urls')))

convert dictionary of pairs `d` to a list of tuples

[(v, k) for k, v in d.items()]

remove items from a list while iterating

somelist = [x for x in somelist if not determine(x)]

return multiple lists from comprehension in python

x, y = zip(*[(i, -1 * j) for i, j in enumerate(range(10))])

python: how to remove values from 2 lists based on what's in 1 list

ind = [i for i in range(len(yVar)) if yVar[i] < 100]

how to count the number of words in a sentence?

len(s.split())

standard way to open a folder window in linux?

os.system('xdg-open "%s"' % foldername)

fill missing indices in pandas

x.resample('D').fillna(0)

python sorting - a list of objects

somelist.sort(key=lambda x: x.resultType)

python regular expression to replace everything but specific words

print(re.sub('(.+?)(going|you|$)', subit, s))

get a utf-8 string literal representation of byte string `x`

"""x = {}""".format(x.decode('utf8')).encode('utf8')

find all the occurrences of a character in a string

[x.start() for x in re.finditer('\\|', str)]

python: confusions with urljoin

urljoin('http://some/more/', '/thing')

how can i concatenate a series onto a dataframe with pandas?

pd.concat([students, pd.DataFrame(marks)], axis=1)

distance between numpy arrays, columnwise

arr2.T[numpy.array(zip(list(range(0, 3)), list(range(1, 4))))]

how do i make python to wait for a pressed key

input('Press Enter to continue...')

does anybody know of a good example of functional testing a python tkinter application?

Mainscreen()

taking a screenshot with pyglet [fix'd]

pyglet.app.run()

deploy flask app as windows service

app.run(host='192.168.1.6')

throw an exception with message 'this is the exception you expect to handle'

raise Exception('This is the exception you expect to handle')

fors in python list comprehension

[y for y in x for x in data]

finding index of an item closest to the value in a list that's not entirely sorted

min(list(range(len(a))), key=lambda i: abs(a[i] - 11.5))

python - how to sort a list of lists by the fourth element in each list?

unsorted_list.sort(key=lambda x: x[3])

trimming a string " hello\n" by space

' Hello\n'.strip(' ')

python "extend" for a dictionary

a.update(b)

delete items from list `my_list` if the item exist in list `to_dell`

my_list = [[x for x in sublist if x not in to_del] for sublist in my_list]

anchor or lock text to a marker in matplotlib

plt.show()

sql alchemy - how to delete from a model instance?

session.delete(instance)

get a relative path of file 'my_file' into variable `fn`

fn = os.path.join(os.path.dirname(__file__), 'my_file')

get a list `mylist` from 1 to 10

myList = [i for i in range(10)]

pandas groupby: how to get a union of strings

df.groupby('A')['C'].apply(lambda x: '{%s}' % ', '.join(x))

python: passing a function name as an argument in a function

var = dork1

convert string '2011221' into a datetime object using format '%y%w%w'

datetime.strptime('2011221', '%Y%W%w')

pyramid on app engine gets "invalidresponseerror: header values must be str, got 'unicode'

self.redirect('/home.view')

howto determine file owner on windows using python without pywin32

subprocess.call('dir /q', shell=True)

how can i parse a comma delimited string into a list (caveat)?

['test, a', 'foo,bar",baz', 'bar \xc3\xa4 baz']

download a remote image and save it to a django model

imgfile = models.ImageField(upload_to='images/%m/%d')

convert js date object 'tue, 22 nov 2011 06:00:00 gmt' to python datetime

datetime.strptime('Tue, 22 Nov 2011 06:00:00 GMT', '%a, %d %b %Y %H:%M:%S %Z')

is there a way to use two if conditions in list comprehensions in python

[i for i in my_list if not i.startswith(('91', '18'))]

creating a dictionary with list of lists in python

inlinkDict[docid] = adoc[1:] if adoc[1:] else 0

random strings in python

return ''.join(random.choice(string.lowercase) for i in range(length))

how to create a python dictionary with double quotes as default quote format?

print('{%s}' % ', '.join([('"%s": "%s"' % (k, v)) for k, v in list(pairs.items())]))

how to compress with 7zip instead of zip, code changing

subprocess.call(['7z', 'a', filename + '.7z', '*.*'])

how to convert a python set to a numpy array?

numpy.array(list(c))

how do i move the last item in a list to the front in python?

a = a[-1:] + a[:-1]

django - get distinct dates from timestamp

return qs.values('date').annotate(Sum('amount')).order_by('date')

splitting a string based on a certain set of words

result.extend(re.split('_(?:f?or|and)_', s))

set environment variable in python script

os.environ['LD_LIBRARY_PATH'] = 'my_path'

declare an array with element 'i'

intarray = array('i')

how to check for palindrome using python logic

str(n) == str(n)[::-1]

combining rows in pandas

df.groupby(df.index).sum()

check for a valid domain name in a string?

"""[a-zA-Z\\d-]{,63}(\\.[a-zA-Z\\d-]{,63})*"""