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Python concat string with list | """ """.join(list) |
Extending a list of lists in Python? | y = [[] for n in range(2)] |
How do you read a file into a list in Python? | data = [line.strip() for line in open('C:/name/MyDocuments/numbers', 'r')] |
How to delete all instances of a character in a string in python? | """""".join([char for char in 'it is icy' if char != 'i']) |
How to delete all instances of a character in a string in python? | re.sub('i', '', 'it is icy') |
How to delete all instances of a character in a string in python? | """it is icy""".replace('i', '') |
How to delete all instances of a character in a string in python? | """""".join([char for char in 'it is icy' if char != 'i']) |
How to drop rows of Pandas DataFrame whose value in certain columns is NaN | df.dropna(subset=[1]) |
Searching a list of objects in Python | [x for x in myList if x.n == 30] |
converting list of string to list of integer | nums = [int(x) for x in intstringlist] |
converting list of string to list of integer | map(int, eval(input('Enter the unfriendly numbers: '))) |
print in Python without newline or space | sys.stdout.write('.') |
Python float to int conversion | int(round(2.51 * 100)) |
Find all files in directory with extension .txt | os.chdir('/mydir')
for file in glob.glob('*.txt'):
pass |
Find all files in directory with extension .txt | for file in os.listdir('/mydir'):
if file.endswith('.txt'):
pass |
Find all files in directory with extension .txt | for (root, dirs, files) in os.walk('/mydir'):
for file in files:
if file.endswith('.txt'):
pass |
Pandas (python) plot() without a legend | df.plot(legend=False) |
loop through an IP address range | for i in range(256):
for j in range(256):
ip = ('192.168.%d.%d' % (i, j))
print(ip) |
loop through an IP address range | for (i, j) in product(list(range(256)), list(range(256))):
pass |
loop through an IP address range | generator = iter_iprange('192.168.1.1', '192.168.255.255', step=1) |
Python/Numpy: Convert list of bools to unsigned int | sum(1 << i for i, b in enumerate(x) if b) |
Python: How to write multiple strings in one line? | target.write('%r\n%r\n%r\n' % (line1, line2, line3)) |
How to flatten a hetrogenous list of list into a single list in python? | [y for x in data for y in (x if isinstance(x, list) else [x])] |
In Python, is it possible to escape newline characters when printing a string? | print('foo\nbar'.encode('string_escape')) |
String Slicing Python | """""".join(s.rsplit(',', 1)) |
Middle point of each pair of an numpy.array | (x[1:] + x[:-1]) / 2 |
Middle point of each pair of an numpy.array | x[:-1] + (x[1:] - x[:-1]) / 2 |
Reading unicode elements into numpy array | arr = numpy.fromiter(codecs.open('new.txt', encoding='utf-8'), dtype='<U2') |
How to sort this list in Python? | l = sorted(l, key=itemgetter('time'), reverse=True) |
How to sort this list in Python? | l = sorted(l, key=lambda a: a['time'], reverse=True) |
pandas DataFrame filter regex | df.loc[df[0].str.contains('(Hel|Just)')] |
How do I find the string between two special characters? | re.search('\\[(.*)\\]', your_string).group(1) |
How to create a list of date string in 'yyyymmdd' format with Python Pandas? | [d.strftime('%Y%m%d') for d in pandas.date_range('20130226', '20130302')] |
How to count the number of times something occurs inside a certain string? | """The big brown fox is brown""".count('brown') |
Sending post data from angularjs to django as JSON and not as raw content | json.loads(request.body) |
Download file from web in Python 3 | urllib.request.urlretrieve(url, file_name) |
Split string into a list | text.split() |
Split string into a list | text.split(',') |
Split string into a list | line.split() |
Replacing characters in a regex | [re.sub('(?<!\\d)\\.(?!\\d)', ' ', i) for i in s] |
Sort A list of Strings Based on certain field | sorted(list_of_strings, key=lambda s: s.split(',')[1]) |
how to call multiple bash functions using | in python | subprocess.check_call('vasp | tee tee_output', shell=True) |
How to eliminate all strings from a list | [element for element in lst if isinstance(element, int)] |
How to eliminate all strings from a list | [element for element in lst if not isinstance(element, str)] |
How do I sort a list of dictionaries by values of the dictionary in Python? | newlist = sorted(list_to_be_sorted, key=lambda k: k['name']) |
How do I sort a list of dictionaries by values of the dictionary in Python? | newlist = sorted(l, key=itemgetter('name'), reverse=True) |
How do I sort a list of dictionaries by values of the dictionary in Python? | list_of_dicts.sort(key=operator.itemgetter('name')) |
How do I sort a list of dictionaries by values of the dictionary in Python? | list_of_dicts.sort(key=operator.itemgetter('age')) |
How to sort a Dataframe by the ocurrences in a column in Python (pandas) | df.groupby('prots').sum().sort('scores', ascending=False) |
How can I access elements inside a list within a dictionary python? | """,""".join(trans['category']) |
Variants of string concatenation? | """""".join(['A', 'B', 'C', 'D']) |
How do I get JSON data from RESTful service using Python? | json.load(urllib.request.urlopen('url')) |
Removing an item from list matching a substring - Python | [x for x in sents if not x.startswith('@$\t') and not x.startswith('#')] |
Django filter by hour | Entry.objects.filter(pub_date__contains='08:00') |
sort a list of dicts by x then by y | list.sort(key=lambda item: (item['points'], item['time'])) |
How to convert a Python datetime object to seconds | (t - datetime.datetime(1970, 1, 1)).total_seconds() |
How to replace only part of the match with python re.sub | re.sub('(\\_a)?\\.([^\\.]*)$', '_suff.\\2', 'long.file.name.jpg') |
How can I reload objects in my namespace in ipython | import imp
imp.reload(module) |
How to get a 16bit Unsigned integer in python | struct.unpack('H', struct.pack('h', number)) |
How can I use sum() function for a list in Python? | numlist = [float(x) for x in numlist] |
Removing index column in pandas | df.to_csv(filename, index=False) |
How to convert a string data to a JSON object in python? | json_data = json.loads(unescaped) |
Is there a Python Library that contains a list of all the ascii characters? | [chr(i) for i in range(127)] |
Python how to write to a binary file? | newFile.write(struct.pack('5B', *newFileBytes)) |
Python Regex - checking for a capital letter with a lowercase after | re.sub('^[A-Z0-9]*(?![a-z])', '', string) |
Last Key in Python Dictionary | list(dict.keys())[-1] |
write line to file | print('hi there', file=f) |
write line to file | f = open('myfile', 'w')
f.write('hi there\n') |
write line to file | with open('somefile.txt', 'a') as the_file:
the_file.write('Hello\n') |
Python - Unicode to ASCII conversion | s.encode('iso-8859-15') |
How to get max value in django ORM | AuthorizedEmail.objects.filter(group=group).order_by('-added')[0] |
Python regex findall numbers and dots | re.findall('Test([0-9.]*[0-9]+)', text) |
Python regex findall numbers and dots | re.findall('Test([\\d.]*\\d+)', text) |
Is there a way to run powershell code in python | os.system('powershell.exe', 'script.ps1') |
Sorting a dictionary of tuples in Python | b.sort(key=lambda x: x[1][2]) |
How do I get all the keys that are stored in the Cassandra column family with pycassa? | list(cf.get_range().get_keys()) |
how to create a file name with the current date & time in python? | datetime.datetime.now() |
How to get the index of an integer from a list if the list contains a boolean? | next(i for i, x in enumerate(lst) if not isinstance(x, bool) and x == 1) |
Subtract a value from every number in a list in Python? | a[:] = [(x - 13) for x in a] |
Best way to choose a random file from a directory | random.choice(os.listdir('C:\\')) |
How to get the highest element in absolute value in a numpy matrix? | max(x.min(), x.max(), key=abs) |
Using Regular Expressions to extract specific urls in python | re.findall('"(http.*?)"', s, re.MULTILINE | re.DOTALL) |
Using Regular Expressions to extract specific urls in python | re.findall('http://[^t][^s"]+\\.html', document) |
Is there a function in Python to split a string without ignoring the spaces? | mystring.replace(' ', '! !').split('!') |
Open file in Python | open(path, 'r') |
Sum of multiple list of lists index wise | [[sum(item) for item in zip(*items)] for items in zip(*data)] |
numpy: syntax/idiom to cast (n,) array to a (n, 1) array? | a[:, (np.newaxis)] |