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Merge DataFrames in Pandas using the mean,"pd.concat((df1, df2), axis=1).mean(axis=1)" |
Average values in two Numpy arrays,"np.mean(np.array([old_set, new_set]), axis=0)" |
Changing marker's size in matplotlib,"scatter(x, y, s=500, color='green', marker='h')" |
split items in list,"result = [item for word in words for item in word.split(',')]" |
Converting JSON date string to python datetime,"datetime.datetime.strptime('2012-05-29T19:30:03.283Z', '%Y-%m-%dT%H:%M:%S.%fZ')" |
python comprehension loop for dictionary,sum(item['one'] for item in list(tadas.values())) |
How to base64 encode a PDF file in Python,"a = open('pdf_reference.pdf', 'rb').read().encode('base64')" |
split a string in python,a.rstrip().split('\n') |
split a string in python,a.split('\n')[:-1] |
How can I return HTTP status code 204 from a Django view?,return HttpResponse(status=204) |
check if a value exist in a list,(7 in a) |
check if a value exist in a list,('a' in a) |
Sorting JSON data by keys value,"sorted(results, key=itemgetter('year'))" |
How do I get current URL in Selenium Webdriver 2 Python?,print(browser.current_url) |
Python: Split string with multiple delimiters,"re.split('; |, ', str)" |
Unescaping Characters in a String with Python,"""""""\\u003Cp\\u003E"""""".decode('unicode-escape')" |
Convert string date to timestamp in Python,"time.mktime(datetime.datetime.strptime(s, '%d/%m/%Y').timetuple())" |
Convert string date to timestamp in Python,"int(datetime.datetime.strptime('01/12/2011', '%d/%m/%Y').strftime('%s'))" |
How to get http headers in flask?,request.headers['your-header-name'] |
How to subset a data frame using Pandas based on a group criteria?,df.groupby('User')['X'].filter(lambda x: x.sum() == 0) |
How to subset a data frame using Pandas based on a group criteria?,df.loc[df.groupby('User')['X'].transform(sum) == 0] |
How to subset a data frame using Pandas based on a group criteria?,df.groupby('User')['X'].transform(sum) == 0 |
How do I find an element that contains specific text in Selenium Webdriver (Python)?,"driver.find_elements_by_xpath(""//*[contains(text(), 'My Button')]"")" |
Convert pandas group by object to multi-indexed Dataframe,"df.set_index(['Name', 'Destination'])" |
How do I coalesce a sequence of identical characters into just one?,"print(re.sub('(\\W)\\1+', '\\1', a))" |
How to open a file with the standard application?,"os.system('start ""$file""')" |
Convert a Unicode string to a string,"unicodedata.normalize('NFKD', title).encode('ascii', 'ignore')" |
Convert a Unicode string to a string,"a.encode('ascii', 'ignore')" |
Get a filtered list of files in a directory,"files = [f for f in os.listdir('.') if re.match('[0-9]+.*\\.jpg', f)]" |
Adding a 1-D Array to a 3-D array in Numpy,"np.zeros((6, 9, 20)) + np.array([1, 2, 3, 4, 5, 6, 7, 8, 9])[(None), :, (None)]" |
Adding a 1-D Array to a 3-D array in Numpy,"np.zeros((6, 9, 20)) + np.array([1, 2, 3, 4, 5, 6, 7, 8, 9]).reshape((1, 9, 1))" |
How can I launch an instance of an application using Python?,os.system('start excel.exe <path/to/file>') |
What is the proper way to print a nested list with the highest value in Python,"print(max(x, key=sum))" |
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) |
Python - Insert numbers in string between quotes,"re.sub('(\\d+)', '""\\1""', 'This is number 1 and this is number 22')" |
Multiplying Rows and Columns of Python Sparse Matrix by elements in an Array,"numpy.dot(numpy.dot(a, m), a)" |
How to check if something exists in a postgresql database using django?,"Entry.objects.filter(name='name', title='title').exists()" |
Sort a nested list by two elements,"sorted(l, key=lambda x: (-int(x[1]), x[0]))" |
Django - How to simply get domain name?,request.META['HTTP_HOST'] |
Python Regex Get String Between Two Substrings,"re.findall(""api\\('(.*?)'"", ""api('randomkey123xyz987', 'key', 'text')"")" |
Call Perl script from Python,"subprocess.call(['/usr/bin/perl', './uireplace.pl', var])" |
Pythonic way to print list items,print('\n'.join(str(p) for p in myList)) |
update dictionary with dynamic keys and values in python,mydic.update({i: o['name']}) |
how to split a unicode string into list,list(stru.decode('utf-8')) |
Convert UTF-8 with BOM to UTF-8 with no BOM in Python,u = s.decode('utf-8-sig') |
How do I do a not equal in Django queryset filtering?,Entry.objects.filter(~Q(id=3)) |
How can I lookup an attribute in any scope by name?,"getattr(__builtins__, 'range')" |
"How to make a python script which can logoff, shutdown, and restart a computer?","subprocess.call(['shutdown', '/r', '/t', '900'])" |
"How to make a python script which can logoff, shutdown, and restart a computer?","subprocess.call(['shutdown', '/s'])" |
"How to make a python script which can logoff, shutdown, and restart a computer?","subprocess.call(['shutdown', '/a '])" |
"How to make a python script which can logoff, shutdown, and restart a computer?","subprocess.call(['shutdown', '/l '])" |
"How to make a python script which can logoff, shutdown, and restart a computer?","subprocess.call(['shutdown', '/r'])" |
How to erase the file contents of text file in Python?,"open('filename', 'w').close()" |
How to erase the file contents of text file in Python?,"open('file.txt', 'w').close()" |
Pandas DataFrame to List of Dictionaries,df.to_dict('index') |
Pandas DataFrame to List of Dictionaries,df.to_dict('records') |
pandas dataframe groupby datetime month,df.groupby(pd.TimeGrouper(freq='M')) |
How do I divide the members of a list by the corresponding members of another list in Python?,"[(c / t) for c, t in zip(conversions, trials)]" |
sort dict by value python,"sorted(data, key=data.get)" |
sort dict by value python,sorted(data.values()) |
sort dict by value python,"sorted(list(data.items()), key=lambda x: x[1])" |
sort dict by value python,"sorted(list(data.items()), key=lambda x: x[1])" |
How do I display current time using Python + Django?,now = datetime.datetime.now().strftime('%H:%M:%S') |
Find the nth occurrence of substring in a string,"""""""foo bar bar bar"""""".replace('bar', 'XXX', 1).find('bar')" |
How do you check the presence of many keys in a Python dictinary?,"set(['stackoverflow', 'google']).issubset(sites)" |
Replace part of a string in Python?,"stuff.replace(' and ', '/')" |
How to use `numpy.savez` in a loop for save more than one array?,"np.savez(tmp, *[getarray[0], getarray[1], getarray[8]])" |
time offset,"t = datetime.datetime.now() |
(t - datetime.timedelta(hours=1, minutes=10))" |
time offset,"(t - datetime.timedelta(hours=1, minutes=10))" |
time offset,"dt = datetime.datetime.combine(datetime.date.today(), t)" |
time offset,dt -= datetime.timedelta(hours=5) |
Manipulating binary data in Python,print(data.encode('hex')) |
Manipulating binary data in Python,print(' '.join([str(ord(a)) for a in data])) |
python - iterating over a subset of a list of tuples,[x for x in l if x[1] == 1] |
How to read stdin to a 2d python array of integers?,a.fromlist([int(val) for val in stdin.read().split()]) |
Is there a way to refer to the entire matched expression in re.sub without the use of a group?,"print(re.sub('[_%^$]', '\\\\\\g<0>', line))" |
How to use regular expression in lxml xpath?,"doc.xpath(""//a[starts-with(text(),'some text')]"")" |
Compare elements of a list of lists and return a list,zip(*a) |
Convert list of strings to int,"[map(int, sublist) for sublist in lst]" |
Convert list of strings to int,[[int(x) for x in sublist] for sublist in lst] |
Numpy: find index of elements in one array that occur in another array,"np.where(np.in1d(A, B))[0]" |
Split dictionary of lists into list of dictionaries,"[{'key1': a, 'key2': b} for a, b in zip(d['key1'], d['key2'])]" |
Split dictionary of lists into list of dictionaries,"map(dict, zip(*[[(k, v) for v in value] for k, value in list(d.items())]))" |
Get Last Day of the Month,"calendar.monthrange(2002, 1)" |
Get Last Day of the Month,"calendar.monthrange(2008, 2)" |
Get Last Day of the Month,"calendar.monthrange(2100, 2)" |
Get Last Day of the Month,"calendar.monthrange(year, month)[1]" |
Get Last Day of the Month,"monthrange(2012, 2)" |
Get Last Day of the Month,"(datetime.date(2000, 2, 1) - datetime.timedelta(days=1))" |
Calling an external command,from subprocess import call |
Calling an external command,os.system('some_command with args') |
Calling an external command,os.system('some_command < input_file | another_command > output_file') |
Calling an external command,stream = os.popen('some_command with args') |
Calling an external command,"print(subprocess.Popen('echo Hello World', shell=True, stdout=subprocess.PIPE).stdout.read())" |
Calling an external command,print(os.popen('echo Hello World').read()) |
Calling an external command,"return_code = subprocess.call('echo Hello World', shell=True)" |
Calling an external command,"call(['ls', '-l'])" |
Url decode UTF-8 in Python,print(urllib.parse.unquote(url).decode('utf8')) |
Url decode UTF-8 in Python,url = urllib.parse.unquote(url).decode('utf8') |
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