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check if a directory exists and create it if necessary | os.makedirs(path) |
Replace a substring when it is a separate word | re.sub('\\bH3\\b', 'H1', text) |
Python: removing characters except digits from string | re.sub('\\D', '', 'aas30dsa20') |
Python: removing characters except digits from string | """""".join([x for x in 'aas30dsa20' if x.isdigit()]) |
How to access a tag called "name" in BeautifulSoup | print(soup.find('name').string) |
Iterate through PyMongo Cursor as key-value pair | records = dict((record['_id'], record) for record in cursor) |
Python how to combine two matrices in numpy | np.concatenate((A, B)) |
Python how to combine two matrices in numpy | np.vstack((A, B)) |
how to check the character count of a file in python | os.stat(filepath).st_size |
count the occurrences of a list item | l.count('a') |
count the occurrences of a list item | Counter(l) |
count the occurrences of a list item | [[x, l.count(x)] for x in set(l)] |
count the occurrences of a list item | dict(((x, l.count(x)) for x in set(l))) |
count the occurrences of a list item | l.count('b') |
How to copy a file using python? | shutil.copy(srcfile, dstdir) |
Efficient way to find the largest key in a dictionary with non-zero value | max(k for k, v in x.items() if v != 0) |
Efficient way to find the largest key in a dictionary with non-zero value | (k for k, v in x.items() if v != 0) |
Efficient way to find the largest key in a dictionary with non-zero value | max(k for k, v in x.items() if v != 0) |
Re-read an open file Python | file.seek(0) |
Coalesce values from 2 columns into a single column in a pandas dataframe | df['c'] = np.where(df['a'].isnull, df['b'], df['a']) |
python: Is this a wrong way to remove an element from a dict? | del d['ele'] |
How can I subtract or add 100 years to a datetime field in the database in Django? | MyModel.objects.update(timestamp=F('timestamp') + timedelta(days=36524.25)) |
How to merge multiple lists into one list in python? | ['it'] + ['was'] + ['annoying'] |
How to increment a value with leading zeroes? | str(int(x) + 1).zfill(len(x)) |
How can I check if a Pandas dataframe's index is sorted | all(df.index[:-1] <= df.index[1:]) |
Convert tuple to list | list(t) |
Convert tuple to list | tuple(l) |
Convert tuple to list and back | level1 = map(list, level1) |
how to send the output of pprint module to a log file | pprint.pprint(dataobject, logFile) |
Python Pandas: Get index of rows which column matches certain value | df.loc[df['BoolCol']] |
Python Pandas: Get index of rows which column matches certain value | df.iloc[np.flatnonzero(df['BoolCol'])] |
Python Pandas: Get index of rows which column matches certain value | df[df['BoolCol'] == True].index.tolist() |
Python Pandas: Get index of rows which column matches certain value | df[df['BoolCol']].index.tolist() |
How do I change directory back to my original working directory with Python? | os.chdir(owd) |
How to insert strings with quotes and newlines into sqlite db with Python? | c.execute("INSERT INTO test VALUES (?, 'bar')", (testfield,)) |
Python - how to convert a "raw" string into a normal string | """\\x89\\n""".decode('string_escape') |
Python - how to convert a "raw" string into a normal string | raw_string.decode('string_escape') |
Python - how to convert a "raw" string into a normal string | raw_byte_string.decode('unicode_escape') |
Splitting a string with repeated characters into a list using regex | [m.group(0) for m in re.finditer('(\\d)\\1*', s)] |
How to do a scatter plot with empty circles in Python? | plt.scatter(np.random.randn(100), np.random.randn(100), facecolors='none') |
How to do a scatter plot with empty circles in Python? | plt.plot(np.random.randn(100), np.random.randn(100), 'o', mfc='none') |
Deleting a div with a particlular class using BeautifulSoup | soup.find('div', id='main-content').decompose() |
How to filter rows containing a string pattern from a Pandas dataframe | df[df['ids'].str.contains('ball')] |
How to convert pandas index in a dataframe to a column? | df.reset_index(level=0, inplace=True) |
How to convert pandas index in a dataframe to a column? | df['index1'] = df.index |
How to convert pandas index in a dataframe to a column? | df.reset_index(level=['tick', 'obs']) |
Generic reverse of list items in Python | [x[::-1] for x in b] |
in Numpy, how to zip two 2-D arrays? | np.array([zip(x, y) for x, y in zip(a, b)]) |
in Numpy, how to zip two 2-D arrays? | np.array(zip(a.ravel(), b.ravel()), dtype='i4,i4').reshape(a.shape) |
How to convert a list of longs into a comma separated string in python | """,""".join([str(i) for i in list_of_ints]) |
Posting raw data with Python | requests.post(url, data=DATA, headers=HEADERS_DICT, auth=(username, password)) |
Find last occurrence of character | 'abcd}def}'.rfind('}') |
Ending with a for loop in python | print([item for item in [1, 2, 3]]) |
transpose dictionary (extract all the values for one key from a list of dictionaries) | [(x['x'], x['y']) for x in d] |
How to get the filename without the extension from a path in Python? | print(os.path.splitext(os.path.basename('hemanth.txt'))[0]) |
Make dictionary from list with python | dict(x[i:i + 2] for i in range(0, len(x), 2)) |
Merging a list of lists | values = sum([['A', 'B', 'C'], ['D', 'E', 'F'], ['G', 'H', 'I']], []) |
How to select rows in a DataFrame between two values, in Python Pandas? | df = df[(df['closing_price'] >= 99) & (df['closing_price'] <= 101)] |
Replace all occurrences of a string in a pandas dataframe (Python) | df.replace({'\n': '<br>'}, regex=True) |
Replace all occurrences of a string in a pandas dataframe (Python) | df.replace({'\n': '<br>'}, regex=True) |
Mapping a string into a list of pairs | [(x + y) for x, y in zip(word, word[1:])] |
Mapping a string into a list of pairs | list(map(lambda x, y: x + y, word[:-1], word[1:])) |
How do you extract a url from a string using python? | print(re.findall('(https?://[^\\s]+)', myString)) |
How do you extract a url from a string using python? | print(re.search('(?P<url>https?://[^\\s]+)', myString).group('url')) |
Remove all special characters, punctuation and spaces from string | re.sub('[^A-Za-z0-9]+', '', mystring) |
How to get a daterange of the 2nd Fridays of each month? | pd.date_range('2016-01-01', freq='WOM-2FRI', periods=13) |
Multidimensional array in Python | matrix = [[a, b], [c, d], [e, f]] |
How do I replace whitespaces with underscore and vice versa? | mystring.replace(' ', '_') |
How to get an absolute file path in Python | os.path.abspath('mydir/myfile.txt') |
Is there a string-collapse library function in python? | """ """.join(my_string.split()) |
Get Filename Without Extension in Python | os.path.splitext(filename)[0] |
How to sum elements in functional way | [sum(l[:i]) for i, _ in enumerate(l)] |
Python Regex Split Keeps Split Pattern Characters | """Docs/src/Scripts/temp""".replace('/', '/\x00/').split('\x00') |
Shuffle columns of an array with Numpy | np.random.shuffle(np.transpose(r)) |
Copy all values in a column to a new column in a pandas dataframe | df['D'] = df['B'] |
Find a value within nested json dictionary in python | list(data['A']['B'].values())[0]['maindata'][0]['Info'] |
True for all characters of a string | all(predicate(x) for x in string) |
How to determine number of files on a drive with Python? | os.statvfs('/').f_files - os.statvfs('/').f_ffree |
how to get a single result from a SQLite query in python? | cursor.fetchone()[0] |
How to convert a string list into an integer in python | user_list = [int(number) for number in user_input.split(',')] |
How to convert a string list into an integer in python | [int(s) for s in user.split(',')] |
Sorting a Python list by two criteria | sorted(list, key=lambda x: (x[0], -x[1])) |
How to sort a list of objects , based on an attribute of the objects? | ut.sort(key=cmpfun, reverse=True) |
How to sort a list of objects , based on an attribute of the objects? | ut.sort(key=lambda x: x.count, reverse=True) |
How to sort a list of objects , based on an attribute of the objects? | ut.sort(key=lambda x: x.count, reverse=True) |
Click a href button with selenium and python? | driver.find_element_by_partial_link_text('Send').click() |
Click a href button with selenium and python? | driver.findElement(By.linkText('Send InMail')).click() |
Click a href button with selenium and python? | driver.find_element_by_link_text('Send InMail').click() |
Casting an int to a string in Python | 'ME' + str(i) |
Sorting data in DataFrame Pandas | df.sort_values(['System_num', 'Dis']) |
Prepend a line to an existing file in Python | open('outfile', 'w').write('#test firstline\n' + open('infile').read()) |
Python sort a List by length of value in tuple | l.sort(key=lambda t: len(t[1]), reverse=True) |
Split by suffix with Python regular expression | re.findall('\\b(\\w+)d\\b', s) |
python's re: return True if regex contains in the string | bool(re.search('ba[rzd]', 'foobarrrr')) |
Removing duplicates in lists | list(set(t)) |
Removing duplicates in lists | list(set(source_list)) |
Removing duplicates in lists | list(OrderedDict.fromkeys('abracadabra')) |
How to make List from Numpy Matrix in Python | numpy.array(a).reshape(-1).tolist() |
How to make List from Numpy Matrix in Python | numpy.array(a)[0].tolist() |
Beautifulsoup - nextSibling | print(soup.find(text='Address:').findNext('td').contents[0]) |