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communication between two computers using python socket,time.sleep(0.5) |
pandas dataframe add column to index without resetting,"df.set_index(['d'], append=True)" |
missing data in a column of pandas dataframe,"salesdata.loc[~salesdata.Outlet_Size.isnull(), 'Outlet_Size'].unique()" |
how to add a colorbar for a hist2d plot,"plt.colorbar(im, ax=ax)" |
converting a time string to seconds in python,"time.strptime('00:00:00,000'.split(',')[0], '%H:%M:%S')" |
how to display image in pygame?,pygame.display.flip() |
is there a way to leave an argument out of the help using python argparse,"parser.add_argument('--secret', help=argparse.SUPPRESS)" |
how to find the indexes of matches in two lists,"[i for i, (a, b) in enumerate(zip(vec1, vec2)) if a == b]" |
edit the values in a list of dictionaries?,"d.update((k, 'value3') for k, v in d.items() if v == 'value2')" |
how to decrement a variable while printing in python?,print(decrement()) |
"find element `a` that contains string ""text a"" in file `root`","e = root.xpath('.//a[contains(text(),""TEXT A"")]')" |
more elegant way to create a 2d matrix in python,a = [[(0) for y in range(8)] for x in range(8)] |
"how do i modify a single character in a string, in python?",a = list('hello') |
group the values from django model `article` with group by value `pub_date` and annotate by `title`,Article.objects.values('pub_date').annotate(article_count=Count('title')) |
howto uncompress gzipped data in a byte array?,zlib.decompress(data) |
create a list with the characters of a string `5+6`,list('5+6') |
how to filter from csv file using python script,"csv.writer(open('abx.csv', 'w'), delimiter=' ').writerows(filtered)" |
"python zlib output, how to recover out of mysql utf-8 table?",zlib.decompress(u.encode('latin1')) |
copy list `old_list` as `new_list`,new_list = old_list[:] |
find phone numbers in python script,"reg = re.compile('.*?(\\(?\\d{3}\\D{0,3}\\d{3}\\D{0,3}\\d{4}).*?', re.S)" |
don't understand this python for loop,"[('pos1', 'target1'), ('pos2', 'target2')]" |
write to utf-8 file in python,file.write('\ufeff') |
how to pass a list of lists through a for loop in python?,"[[0.5, 0.625], [0.625, 0.375]]" |
network pinging with python,os.system('ping -c 5 www.examplesite.com') |
grouping pandas dataframe by n days starting in the begining of the day,df['dateonly'] = pd.to_datetime(df['dateonly']) |
map two lists into a dictionary in python,"dict((k, v) for k, v in zip(keys, values))" |
converting html to text with python,soup = BeautifulSoup(html) |
best way to print list output in python,print('---'.join(vals)) |
how to compare two json objects with the same elements in a different order equal?,sorted(a.items()) == sorted(b.items()) |
round number 1.0005 up to 3 decimal places,"round(1.0005, 3)" |
how do i coalesce a sequence of identical characters into just one?,"print(re.sub('-+', '-', astr))" |
pandas dataframe `df` column 'a' to list,df['a'].values.tolist() |
easier way to add multiple list items?,sum(sum(x) for x in lists) |
how to check for a key in a defaultdict without updating the dictionary (python)?,"dct.get(key, 'ham')" |
pretty-print ordered dictionary `o`,pprint(dict(list(o.items()))) |
how do i plot hatched bars using pandas?,"ax.legend(loc='center right', bbox_to_anchor=(1, 1), ncol=4)" |
find all indices of maximum in pandas dataframe,"np.where(df.values == rowmax[:, (None)])" |
pandas: combine two columns in a dataframe,"pandas.concat([df['foo'].dropna(), df['bar'].dropna()]).reindex_like(df)" |
filter a dictionary `d` to remove keys with value 'none' and replace other values with 'updated',"dict((k, 'updated') for k, v in d.items() if v != 'None')" |
how can i get an array of alternating values in python?,a[1::2] = -1 |
"check whether file ""/path/to/file"" exists","my_file = Path('/path/to/file') |
if my_file.is_file(): |
pass" |
get a new string with the 3rd to the second-to-last characters of string `x`,x[2:(-2)] |
how can i speed up transition matrix creation in numpy?,"m3 = np.zeros((50, 50))" |
flask : how to architect the project with multiple apps?,settings.py |
get the immediate minimum among a list of numbers in python,a = list(a) |
output first 100 characters in a string,print(my_string[0:100]) |
split string using a newline delimeter with python,print(data.split('\n')) |
write the content of file `xxx.mp4` to file `f`,"f.write(open('xxx.mp4', 'rb').read())" |
how to get only div with id ending with a certain value in beautiful soup?,soup.select('div[id$=_answer]') |
max value within a list of lists of tuple,"max(flatlist, key=lambda x: x[1])" |
summarizing a dictionary of arrays in python,"OrderedDict(heapq.nlargest(3, iter(mydict.items()), key=lambda tup: sum(tup[1])))" |
convert hex string '0xdeadbeef' to decimal,ast.literal_eval('0xdeadbeef') |
reading data blocks from a file in python,f = open('file_name_here') |
"using scikit-learn classifier inside nltk, multiclass case","clf.fit(X_train, y_train)" |
dirty fields in django,"super(Klass, self).save(*args, **kwargs)" |
how to convert an integer timestamp back to utc datetime?,datetime.utcfromtimestamp(float(self.timestamp)) |
get dict key by max value,"max(d, key=d.get)" |
how to get two random records with django,MyModel.objects.order_by('?')[:2] |
how to reverse tuples in python?,reversed(x) |
how can i plot hysteresis in matplotlib?,fig = plt.figure() |
none,"datetime.datetime.strptime('2007-03-04T21:08:12', '%Y-%m-%dT%H:%M:%S')" |
regex in python - using groups,"re.findall('\\bpresent\\b', tale)" |
pythonic way to calculate streaks in pandas dataframe,"streaks(df, 'E')" |
how do i halt execution in a python script?,sys.exit() |
add items to a dictionary of lists,"dict(zip(keys, zip(*data)))" |
insert row into excel spreadsheet using openpyxl in python,"wb.create_sheet(0, 'Sheet1')" |
sympy : creating a numpy function from diagonal matrix that takes a numpy array,"Matrix([[32.4, 32.4, 32.4], [32.8, 32.8, 32.8], [33.2, 33.2, 33.2]])" |
get a list of values for key 'key' from a list of dictionaries `l`,[d['key'] for d in l] |
search for the last occurence in multiple columns in a dataframe,df.stack(level=0).groupby('team').tail(1) |
"python code simplification? one line, add all in list",sum(int(n) for n in str(2 ** 1000)) |
python sockets: enabling promiscuous mode in linux,"s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)" |
get sql headers from numpy array in python,"[('a', '<i4'), ('b', '<i4'), ('c', '<i4')]" |
sum the second value of each tuple in a list,sum(zip(*structure)[1]) |
flask application traceback doesn't show up in server log,app.run(debug=True) |
multiprocessing.pool with a global variable,"pool = Pool(4, initializer, ())" |
iterating through directories with python,"print(os.path.join(subdir, file))" |
multiplication of 1d arrays in numpy,"np.dot(a[:, (None)], b[(None), :])" |
multiply high order matrices with numpy,"np.tensordot(ind, dist, axes=[1, 1])[0].T" |
how does python variable scoping works?,example2() |
find all files with extension '.c' in directory `folder`,results += [each for each in os.listdir(folder) if each.endswith('.c')] |
how to get all sub-elements of an element tree with python elementtree?,[elem.tag for elem in a.iter() if elem is not a] |
python/matplotlib - is there a way to make a discontinuous axis?,plt.show() |
python check if all elements of a list are the same type,"all(isinstance(x, int) for x in lst)" |
how do i exclude an inherited field in a form in django?,self.fields.pop('is_staff') |
find and replace 2nd occurrence of word 'cat' by 'bull' in a sentence 's',"re.sub('^((.*?cat.*?){1})cat', '\\1Bull', s)" |
how to sort a pandas dataframe according to multiple criteria?,"df.sort_values(['Peak', 'Weeks'], ascending=[True, False], inplace=True)" |
how to select only specific columns from a dataframe with multiindex columns?,"data.loc[:, ([('one', 'a'), ('one', 'c'), ('two', 'a'), ('two', 'c')])]" |
how to flatten a tuple in python,"[(a, b, c) for a, (b, c) in l]" |
set default directory of pydev interactive console?,sys.path.append('F:\\projects\\python') |
how can i sum the product of two list items using for loop in python?,"sum(x * y for x, y in zip(a, b))" |
rename file `dir` to `dir` + '!',"os.rename(dir, dir + '!')" |
can i sort text by its numeric value in python?,"sorted(list(mydict.items()), key=lambda a: map(int, a[0].split('.')))" |
get index of elements in array `a` that occur in another array `b`,"np.where(np.in1d(A, B))[0]" |
python dataframe pandas drop column using int,"df.drop(df.columns[i], axis=1)" |
delete digits in python (regex),"re.sub('$\\d+\\W+|\\b\\d+\\b|\\W+\\d+$', '', s)" |
remove all instances of parenthesesis containing text beginning with `as ` from string `line`,"line = re.sub('\\(+as .*?\\) ', '', line)" |
check if key 'key1' in `dict`,('key1' in dict) |
"join multiple dataframes `d1`, `d2`, and `d3` on column 'name'","df1.merge(df2, on='name').merge(df3, on='name')" |
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