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more elegant way to implement regexp-like quantifiers | ['x', ' ', 'y', 'y', ' ', 'z'] |
convert a string 'mystr' to numpy array of integer values | print(np.array(list(mystr), dtype=int)) |
how to convert this particular json string into a python dictionary? | json.loads('[{"name":"sam"}]') |
creating a screenshot of a gtk.window | gtk.main() |
how to delete a record in django models? | SomeModel.objects.filter(id=id).delete() |
python- trying to multiply items in list | [i for i in a if i.isdigit()] |
how to make mxn piechart plots with one legend and removed y-axis titles in matplotlib | plt.show() |
revers correlating bits of integer `n` | int('{:08b}'.format(n)[::-1], 2) |
swap letters in a string in python | return strg[n:] + strg[:n] |
finding in elements in a tuple and filtering them | [x for x in l if x[0].startswith('img')] |
python - how to clear spaces from a text | re.sub(' (?=(?:[^"]*"[^"]*")*[^"]*$)', '', s) |
pandas: elementwise multiplication of two dataframes | pd.DataFrame(df.values * df2.values, columns=df.columns, index=df.index) |
concatenate elements of a tuple in a list in python | new_data = (' '.join(w) for w in sixgrams) |
iterating key and items over dictionary `d` | for (k, v) in list(d.items()):
pass |
what is the best way to sort list with custom sorting parameters in python? | li1.sort(key=lambda x: not x.startswith('b.')) |
can i use an alias to execute a program from a python script | os.system('source .bashrc; shopt -s expand_aliases; nuke -x scriptPath') |
regular expression in python sentence extractor | re.split('\\.\\s', re.sub('\\.\\s*$', '', text)) |
how to build and fill pandas dataframe from for loop? | pd.DataFrame(d, columns=('Player', 'Team', 'Passer Rating')) |
how can i convert a python datetime object to utc? | datetime.utcnow() + timedelta(minutes=5) |
numpy select fixed amount of values among duplicate values in array | array([1, 2, 2, 3, 3]) |
how to pass a dictionary as value to a function in python | {'physics': 1}, {'volume': 1, 'chemistry': 1}, {'chemistry': 1} |
how to decrypt unsalted openssl compatible blowfish cbc/pkcs5padding password in python? | cipher.decrypt(ciphertext).replace('\x08', '') |
convert string to boolean from defined set of strings | s in ['true', '1', 't', 'y', 'yes', 'yeah', 'yup', 'certainly', 'uh-huh'] |
get the path of module `a_module` | print(a_module.__file__) |
how do i draw a grid onto a plot in python? | plt.rc('grid', linestyle='-', color='black') |
how to make a timer program in python | time.sleep(1) |
find first item with alphabetical precedence in list with numbers | min(x for x in lst if isinstance(x, str)) |
convert tab-delimited txt file into a csv file using python | open('demo.txt', 'rb').read() |
call a function `otherfunc` inside a bash script `test.sh` using subprocess | subprocess.call('test.sh otherfunc') |
avoiding regex in pandas str.replace | df['a'] = df['a'].str.replace('in.', ' in. ') |
python - subprocess - how to call a piped command in windows? | subprocess.call(['ECHO', 'Ni']) |
arrows in matplotlib using mplot3d | plt.show() |
encode string "\\xc3\\x85a" to bytes | """\\xc3\\x85a""".encode('utf-8') |
merge values of same key, in list of dicts | [{'id1': k, 'price': temp[k]} for k in temp] |
plotting animated quivers in python | plt.show() |
how to transform a pair of values into a sorted unique array? | sorted(set().union(*input_list)) |
precision in python | print('{0:.2f}'.format(your_number)) |
reverse mapping of dictionary with python | revdict = dict((v, k) for k, v in list(ref.items())) |
get number of workers from process pool in python multiprocessing module | multiprocessing.cpu_count() |
pandas, filter rows which column contain another column | df[df['B'].str.contains('|'.join(df['A']))] |
sqlalchemy and flask, how to query many-to-many relationship | x = Dish.query.filter(Dish.restaurants.any(name=name)).all() |
swap values in a tuple/list inside a list in python? | map(lambda t: (t[1], t[0]), mylist) |
blank lines in file after sorting content of a text file in python | lines.sort() |
google app engine python download file | self.response.headers['Content-Disposition'] = 'attachment; filename=fname.csv' |
python - get yesterday's date as a string in yyyy-mm-dd format | (datetime.now() - timedelta(1)).strftime('%Y-%m-%d') |
delete row based on nulls in certain columns (pandas) | df.dropna(subset=['city', 'latitude', 'longitude'], how='all') |
plot image color histogram using matplotlib | plt.show() |
sorting associative arrays in python | sorted(people, key=operator.itemgetter('name')) |
search for regex pattern 'test(.*)print' in string `teststr` including new line character '\n' | re.search('Test(.*)print', testStr, re.DOTALL) |
validate a filename in python | return os.path.join(directory, filename) |
python numpy: how to count the number of true elements in a bool array | sum([True, True, True, False, False]) |
get top `3` items from a dictionary `mydict` with largest sum of values | heapq.nlargest(3, iter(mydict.items()), key=lambda tup: sum(tup[1])) |
how to filter a dictionary according to an arbitrary condition function? | dict((k, v) for k, v in list(points.items()) if all(x < 5 for x in v)) |
how do i pull a recurring key from a json? | print(item['name']) |
writing utf-8 string to mysql with python | cursor.execute('INSERT INTO mytable SET name = %s', (name,)) |
how to download file from ftp? | ftp.retrbinary('RETR README', open('README', 'wb').write) |
a list as a key for pyspark's reducebykey | rdd.map(lambda k_v: (frozenset(k_v[0]), k_v[1])).groupByKey().collect() |
how to send email attachments with python | smtp.sendmail(send_from, send_to, msg.as_string()) |
index confusion in numpy arrays | A[np.ix_([0, 2], [0, 1], [1, 2])] |
in python, how to convert a hex ascii string to raw internal binary string? | """""".join('{0:04b}'.format(int(c, 16)) for c in hex_string) |
split string `s` into strings of repeating elements | print([a for a, b in re.findall('((\\w)\\2*)', s)]) |
set legend symbol opacity with matplotlib? | plt.legend() |
how to open a file with the standard application? | os.system('start "$file"') |
how can i count the occurrences of an item in a list of dictionaries? | sum(1 for d in my_list if d.get('id') == 20) |
splitting a list inside a pandas dataframe | pd.melt(split, id_vars=['a', 'b'], value_name='TimeStamp') |
increment numpy array with repeated indices | array([0, 0, 2, 1, 0, 1]) |
python re.findall print all patterns | re.findall('(?=(a.*?a))', 'a 1 a 2 a 3 a 4 a') |
pandas - dataframe expansion with outer join | df.columns = ['user', 'tweet'] |
control the keyboard and mouse with dogtail in linux | dogtail.rawinput.click(100, 100) |
convert a binary `b8` to a float number | struct.unpack('d', b8)[0] |
select everything but a list of columns from pandas dataframe | df[df.columns - ['T1_V6']] |
removing nan values from an array | x = x[numpy.logical_not(numpy.isnan(x))] |
parse utf-8 encoded html response `response` to beautifulsoup object | soup = BeautifulSoup(response.read().decode('utf-8')) |
separating a string | ['abcd', 'a,bcd', 'a,b,cd', 'a,b,c,d', 'a,bc,d', 'ab,cd', 'ab,c,d', 'abc,d'] |
generate a 12-digit random number | random.randint(100000000000, 999999999999) |
python finding index of maximum in list | a.index(max(a)) |
replacing '\u200b' with '*' in a string using regular expressions | 'used\u200b'.replace('\u200b', '*') |
regex for matching string python | size = re.findall('\\d+(?:,\\d{3})*(?:\\.\\d+)?', my_string) |
how to use the pass statement in python | print("I'm meth_b") |
python beautifulsoup searching a tag | print(soup.find_all('a', {'class': 'black'})) |
python - convert datetime to varchar/string | datetimevariable.strftime('%Y-%m-%d') |
is there a cake equivalent for python? | main() |
how to convert list of intable strings to int | [[try_int(x) for x in lst] for lst in list_of_lists] |
list all the contents of the directory 'path'. | os.listdir('path') |
how can i handle an alert with ghostdriver via python? | driver.execute_script('return lastAlert') |
python replace backslashes to slashes | print('pictures\\12761_1.jpg'.replace('\\', '/')) |
get multiple matched strings using regex pattern `(?:review: )?(http://url.com/(\\d+))\\s?` | pattern = re.compile('(?:review: )?(http://url.com/(\\d+))\\s?', re.IGNORECASE) |
group vertices in clusters using networkx | nx.draw_spring(G) |
python: get the first character of a the first string in a list? | mylist = ['base', 'sample', 'test'] |
pyqt window focus | self.setWindowFlags(PyQt4.QtCore.Qt.WindowStaysOnTopHint) |
close pyplot figure using the keyboard on mac os x | plt.show() |
python convert decimal to hex | hex(dec).split('x')[1] |
delete all digits in string `s` that are not directly attached to a word character | re.sub('$\\d+\\W+|\\b\\d+\\b|\\W+\\d+$', '', s) |
plotting ellipsoid with matplotlib | plt.show() |
python regex to split on certain patterns with skip patterns | regx = re.compile('\\s+and\\s+|\\s*,\\s*') |
how can i clear the python pdb screen? | os.system('clear') |
write dataframe `df` to csv file `filename` with dates formatted as yearmonthday `%y%m%d` | df.to_csv(filename, date_format='%Y%m%d') |
how to round a number to significant figures in python | round(1234, -3) |
is it possible to get widget settings in tkinter? | print(w.cget('text')) |
how to set default value to all keys of a dict object in python? | d['foo'] |
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