text
stringlengths
4
1.08k
intent,snippet
convert a list to a dictionary in python,"b = dict(zip(a[0::2], a[1::2]))"
python - sort a list of nested lists,l.sort(key=sum_nested)
how to get the size of a string in python?,print(len('\xd0\xb9\xd1\x86\xd1\x8b'))
how to get the fft of a numpy array to work?,np.fft.fft(xfiltered)
calculating difference between two rows in python / pandas,data.set_index('Date').diff()
efficient computation of the least-squares algorithm in numpy,"np.linalg.solve(np.dot(a.T, a), np.dot(a.T, b))"
how to add an image in tkinter (python 2.7),root.mainloop()
matrix mirroring in python,"np.concatenate((A[::-1, :], A[1:, :]), axis=0)"
truth value of numpy array with one falsey element seems to depend on dtype,"np.array(['a', 'b']) != 0"
add column sum as new column in pyspark dataframe,"newdf = df.withColumn('total', sum(df[col] for col in df.columns))"
how to find elements by class,"soup.find_all('div', class_='stylelistrowone stylelistrowtwo')"
how to pad all the numbers in a string,"re.sub('\\d+', lambda x: x.group().zfill(padding), s)"
removing elements from an array that are in another array,"[[1, 1, 2], [1, 1, 3]]"
autofmt_xdate deletes x-axis labels of all subplots,"plt.setp(plt.xticks()[1], rotation=30, ha='right')"
looking for a simple opengl (3.2+) python example that uses glfw,glfw.Terminate()
"reorder indexed rows `['z', 'c', 'a']` based on a list in pandas data frame `df`","df.reindex(['Z', 'C', 'A'])"
issue sending email with python?,"server = smtplib.SMTP('smtp.gmail.com', 587)"
return rows of data associated with the maximum value of column 'value' in dataframe `df`,df.loc[df['Value'].idxmax()]
how to invoke a specific python version within a script.py -- windows,print('World')
set index equal to field 'trx_date' in dataframe `df`,df = df.set_index(['TRX_DATE'])
reference to an element in a list,c[:] = b
how to merge two columns together in pandas,"pd.melt(df, id_vars='Date')[['Date', 'value']]"
create svg / xml document without ns0 namespace using python elementtree,"etree.register_namespace('', 'http://www.w3.org/2000/svg')"
python - flatten a dict of lists into unique values?,sorted({x for v in content.values() for x in v})
argparse module how to add option without any argument?,"parser.add_argument('-s', '--simulate', action='store_true')"
un-escaping characters in a string with python,"""""""\\u003Cp\\u003E"""""".decode('unicode-escape')"
cookies with urllib2 and pywebkitgtk,opener = urllib.request.build_opener(urllib.request.HTTPCookieProcessor(cj))
how to unquote a urlencoded unicode string in python?,urllib.parse.unquote('%0a')
tensorflow: how to get a tensor by name?,sess.run('add:0')
"how to extract links from a webpage using lxml, xpath and python?","['http://stackoverflow.com/foobar', 'http://stackoverflow.com/baz']"
"encode value of key `city` in dictionary `data` as `ascii`, ignoring non-ascii characters","data['City'].encode('ascii', 'ignore')"
append 2 dimensional arrays to one single array,"array([[[1, 5], [2, 6]], [[3, 7], [4, 8]]])"
convert list of lists to delimited string,"result = '\n'.join('\t'.join(map(str, l)) for l in lists)"
pandas: how to run a pivot with a multi-index?,"df.groupby(['year', 'month', 'item'])['value'].sum().unstack('item')"
python: sort a list of lists by an item in the sublist,"sorted(li, key=operator.itemgetter(1), reverse=True)"
get key by value in dictionary with same value in python?,"print([key for key, value in list(d.items()) if value == 1])"
how do you create nested dict in python?,dict(d)
how to replace unicode characters in string with something else python?,str.decode('utf-8')
get count of values associated with key in dict python,sum(1 if d['success'] else 0 for d in s)
access item in a list of lists,50 - list1[0][0] + list1[0][1] - list1[0][2]
python how to get every first element in 2 dimensional list `a`,[i[0] for i in a]
find the element that holds string 'text a' in file `root`,"e = root.xpath('.//a[text()=""TEXT A""]')"
how to get the content of a html page in python,""""""""""""".join(soup.findAll(text=True))"
joining two numpy matrices,"np.hstack([X, Y])"
how to center labels in histogram plot,"ax.set_xticklabels(('1', '2', '3', '4'))"
interprocess communication in python,socket.send('...nah')
save image created via pil to django model,img.save()
using multipartposthandler to post form-data with python,print(urllib.request.urlopen(request).read())
python regex alternative for join,"re.sub('(?<=.)(?=.)', '-', s)"
find all list permutations of a string in python,"['m', 'o', 'n', 'k', 'e', 'y']"
pythonic way to find maximum value and its index in a list?,max_index = my_list.index(max_value)
passing variables to a template on a redirect in python,self.redirect('/sucess')
how do i force django to ignore any caches and reload data?,MyModel.objects.get(id=1).my_field
sorting numbers in string format with python,"keys.sort(key=lambda x: map(int, x.split('.')))"
can't figure out how to bind the enter key to a function in tkinter,root.mainloop()
make subprocess find git executable on windows,"proc = subprocess.Popen(['git', 'status'], stdout=subprocess.PIPE)"
how to check if all items in the list are none?,not any(my_list)
how can i get the list of names used in a formatting string?,get_format_vars('hello %(foo)s there %(bar)s')
"set columns `['race_date', 'track_code', 'race_number']` as indexes in dataframe `rdata`","rdata.set_index(['race_date', 'track_code', 'race_number'])"
check if key 'stackoverflow' and key 'google' are presented in dictionary `sites`,"set(['stackoverflow', 'google']).issubset(sites)"
python pandas filtering out nan from a data selection of a column of strings,nms.dropna(thresh=2)
correct way of implementing cherrypy's autoreload module,cherrypy.quickstart(Root())
pythonic way to assign the parameter into attribute?,"setattr(self, k, v)"
getting the second to last element of list `some_list`,some_list[(-2)]
create a list containing elements from list `list` that are predicate to function `f`,[f(x) for x in list]
print a digit `your_number` with exactly 2 digits after decimal,print('{0:.2f}'.format(your_number))
sort list `mylist` alphabetically,mylist.sort(key=lambda x: x.lower())
python byte string encode and decode,"""""""foo"""""".decode('latin-1')"
"python: how to ""fork"" a session in django","return render(request, 'organisation/wall_post.html', {'form': form})"
how to get an arbitrary element from a frozenset?,"[random.sample(s, 1)[0] for _ in range(10)]"
drop column based on a string condition,"df.drop(df.columns[df.columns.str.match('chair')], axis=1)"
add leading zeros to strings in pandas dataframe,df['ID'] = df['ID'].apply(lambda x: '{0:0>15}'.format(x))
sunflower scatter plot using matplotlib,"plt.scatter(np.random.randn(100), np.random.randn(100), facecolors='none') "
get a list of the keys in each dictionary in a dictionary of dictionaries `foo`,[k for d in list(foo.values()) for k in d]
sort dictionary `mydict` in descending order based on the sum of each value in it,"sorted(iter(mydict.items()), key=lambda tup: sum(tup[1]), reverse=True)[:3]"
django circular model reference,team = models.ForeignKey('Team')
match the pattern '[:;][)(](?![)(])' to the string `str`,"re.match('[:;][)(](?![)(])', str)"
"add row `['8/19/2014', 'jun', 'fly', '98765']` to dataframe `df`","df.loc[len(df)] = ['8/19/2014', 'Jun', 'Fly', '98765']"
matplotlib: formatting dates on the x-axis in a 3d bar graph,plt.show()
python - how to calculate equal parts of two dictionaries?,"d3 = {k: list(set(d1.get(k, [])).intersection(v)) for k, v in list(d2.items())}"
round number 1.005 up to 2 decimal places,"round(1.005, 2)"
pls-da algorithm in python,mypred = myplsda.predict(Xdata)
"set the y axis range to `0, 1000` in subplot using pylab","pylab.ylim([0, 1000])"
plotting categorical data with pandas and matplotlib,df.colour.value_counts().plot(kind='bar')
using python to extract dictionary keys within a list,names = [item['name'] for item in data]
how to sort pandas data frame using values from several columns?,"df.sort(['c1', 'c2'], ascending=[False, True])"
how can i get the previous week in python?,"start_delta = datetime.timedelta(days=weekday, weeks=1)"
generate a random 12-digit number,"int(''.join(str(random.randint(0, 9)) for _ in range(12)))"
functional statement in python to return the sum of certain lists in a list of lists,sum(len(y) for y in x if len(y) > 1)
set execute bit for a file using python,"os.chmod('my_script.sh', 484)"
convert hex string `hexstring` to int,"int(hexString, 16)"
multiple data set plotting with matplotlib.pyplot.plot_date,plt.show()
execute python code `myscript.py` in a virtualenv `/path/to/my/venv` from matlab,system('/path/to/my/venv/bin/python myscript.py')
python: find in list,"[i for i, x in enumerate([1, 2, 3, 2]) if x == 2]"
python implementation of jenkins hash?,"hash, hash2 = hashlittle2(hashstr, 3735928559, 3735928559)"
if/else statements accepting strings in both capital and lower-case letters in python,"""""""3"""""".lower()"
"python: create a ""with"" block on several context managers",do_something()
add variable `var` to key 'f' of first element in json data `data`,data[0]['f'] = var
how to initialize a two-dimensional array in python?,[[Foo() for x in range(10)] for y in range(10)]