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Equivalent of Bash Backticks in Python,output = os.popen('cat /tmp/baz').read() |
How to get the size of a string in Python?,len(s) |
Replace single instances of a character that is sometimes doubled,"s.replace('||', '|||')[::2]" |
how to print dataframe without index,print(df.to_string(index=False)) |
more pythonic way to format a JSON string from a list of tuples,"(lambda lst: json.dumps({item[0]: item[1] for item in lst}))([(1, 2), (3, 4)])" |
Can you plot live data in matplotlib?,plt.draw() |
How to iterate over DataFrame and generate a new DataFrame,"df2 = df[~pd.isnull(df.L)].loc[:, (['P', 'L'])].set_index('P')" |
Matplotlib 3D Scatter Plot with Colorbar,"ax.scatter(xs, ys, zs, c=cs, marker=m)" |
python: sort a list of lists by an item in the sublist,"sorted(a, key=lambda x: x[1], reverse=True)" |
How to achieve two separate list of lists from a single list of lists of tuple with list comprehension?,"[y for sublist in l for x, y in sublist]" |
How to print a file to paper in Python 3 on windows XP/7?,"subprocess.call(['notepad', '/p', filename])" |
remove None value from a list without removing the 0 value,[x for x in L if x is not None] |
Defining the midpoint of a colormap in matplotlib,plt.show() |
Create a Pandas DataFrame from deeply nested JSON,res.drop_duplicates() |
Change string list to list,"ast.literal_eval('[1,2,3]')" |
How can I get the product of all elements in a one dimensional numpy array,numpy.prod(a) |
How to re.sub() a optional matching group using regex in Python?,"re.sub('url(#*.*)', 'url\\1', test1)" |
Is there a way to disable built-in deadlines on App Engine dev_appserver?,urlfetch.set_default_fetch_deadline(60) |
Convert Year/Month/Day to Day of Year in Python,day_of_year = datetime.now().timetuple().tm_yday |
How do I remove a node in xml using ElementTree in Python?,tree.remove(tree.findall('.//B')[1]) |
mysql Compress() with sqlalchemy,session.commit() |
Python: insert 2D array into MySQL table,db.commit() |
How can I set the mouse position in a tkinter window,"win32api.SetCursorPos((50, 50))" |
Python: Split string with multiple delimiters,"re.split('; |, |\\*|\n', a)" |
How to print more than one value in a list comprehension?,"output = [[word, len(word), word.upper()] for word in sent]" |
How can I get part of regex match as a variable in python?,p.match('lalalaI want this partlalala').group(1) |
How to use a dot in Python format strings?,"""""""Hello {user[name]}"""""".format(**{'user': {'name': 'Markus'}})" |
How can you group a very specfic pattern with regex?,rgx = re.compile('(?<!\\+)[a-zA-Z]|[a-zA-Z](?!\\+)') |
How do I find the distance between two points?,dist = sqrt((x2 - x1) ** 2 + (y2 - y1) ** 2) |
Using savepoints in python sqlite3,"conn.execute('create table example (A, B);')" |
Is there a way in Pandas to use previous row value in dataframe.apply when previous value is also calculated in the apply?,"df.loc[0, 'C'] = df.loc[0, 'D']" |
Matrix multiplication in pandas,"np.dot(x, y)" |
Removing items from a nested list Python,[[j for j in families[i] if i != j] for i in range(len(families))] |
How to remove leading and trailing spaces from strings in a Python list,row = [x.strip() for x in row] |
Printing list elements on separated lines in Python,print('\n'.join(sys.path)) |
Convert list of tuples to list?,[i[0] for i in e] |
How do I execute a program from python? os.system fails due to spaces in path,"os.system('""C://Temp/a b c/Notepad.exe""')" |
Check if a list has one or more strings that match a regex,"[re.search('\\d', s) for s in lst]" |
Is there a simple way to change a column of yes/no to 1/0 in a Pandas dataframe?,"pd.Series(np.where(sample.housing.values == 'yes', 1, 0), sample.index)" |
How to crop zero edges of a numpy array?,"array([[1, 0, 1, 1], [0, 0, 0, 0], [1, 1, 1, 0]])" |
Delete final line in file with python,file.close() |
I want to create a column of value_counts in my pandas dataframe,df['Counts'] = df.groupby(['Color'])['Value'].transform('count') |
Web scraping with Python,print(soup.prettify()) |
Is there a way to copy only the structure (not the data) of a Pandas DataFrame?,"df2 = pd.DataFrame(data=None, columns=df1.columns, index=df1.index)" |
GradientBoostingClassifier with a BaseEstimator in scikit-learn?,"self.est.fit(X, y)" |
Efficiently finding the last line in a text file,"line = subprocess.check_output(['tail', '-1', filename])" |
"Difference between using commas, concatenation, and string formatters in Python","print('I am printing {x} and {y}'.format(x=x, y=y))" |
How can I clear the Python pdb screen?,os.system('clear') |
How to write a lambda function that is conditional on two variables (columns) in python,"df['dummyVar '] = df['x'].where((df['x'] > 100) & (df['y'] < 50), df['y'])" |
More elegant way to create a 2D matrix in Python,a = [[(0) for y in range(8)] for x in range(8)] |
Append element to a list inside nested list - python,"[['google', ['http://google.com']], ['computing', ['http://acm.org']]]" |
"Distance between numpy arrays, columnwise","numpy.apply_along_axis(numpy.linalg.norm, 1, dist)" |
Python lists with scandinavic letters,"['Hello', 'world']" |
How to deal with unstable data received from RFID reader?,cache.get('data') |
Is there a portable way to get the current username in Python?,getpass.getuser() |
Convert sets to frozensets as values of a dictionary,"d.update((k, frozenset(v)) for k, v in d.items())" |
Matplotlib: no effect of set_data in imshow for the plot,plt.show() |
How can I find all subclasses of a class given its name?,print([cls.__name__ for cls in vars()['Foo'].__subclasses__()]) |
Union of dict objects in Python,"dict({'a': 'y[a]'}, **{'a', 'x[a]'}) == {'a': 'x[a]'}" |
Fetching most recent related object for set of objects in Peewee,q = B.select().join(A).group_by(A).having(fn.Max(B.date) == B.date) |
Python - Removing vertical bar lines from histogram,plt.show() |
How to make a numpy array from an array of arrays?,np.vstack(a) |
reverse mapping of dictionary with Python,"dict(map(lambda a: [a[1], a[0]], iter(d.items())))" |
"graphing multiple types of plots (line, scatter, bar etc) in the same window",plt.show() |
Removing nan values from a Python List,cleanlist = [(0.0 if math.isnan(x) else x) for x in oldlist] |
python: read json and loop dictionary,output_json = json.load(open('/tmp/output.json')) |
How to assign equal scaling on the x-axis in Matplotlib?,"[0, 1, 2, 2, 3, 4, 5, 5, 5, 6]" |
Efficient way to extract text from between tags,"re.findall('(?<=>)([^<]+)(?=</a>[^<]*</li)', var, re.S)" |
Capitalizing non-ASCII words in Python,print('\xe9'.capitalize()) |
Delete a key and value from an OrderedDict,del dct[key] |
Shade 'cells' in polar plot with matplotlib,plt.show() |
Get the address of a ctypes object,ctypes.addressof(bufstr) |
How do I create a web interface to a simple python script?,app.run() |
"How do I sort a list with ""Nones last""","groups = sorted(groups, key=lambda a: (a['name'] is None, a['name']))" |
Efficiently change a key of a Python dict,"a_send = dict((k[0], v) for k, v in list(a.items()))" |
matplotlib chart - creating horizontal bar chart,plt.show() |
How to close a Tkinter window by pressing a Button?,"button = Button(frame, text='Good-bye.', command=window.destroy)" |
How to download file from ftp?,"ftp.retrbinary('RETR README', open('README', 'wb').write)" |
How to sort OrderedDict of OrderedDict - Python,"OrderedDict(sorted(list(od.items()), key=lambda item: item[1]['depth']))" |
Convert Variable Name to String?,get_indentifier_name_missing_function() |
How do you concatenate two differently named columns together in pandas?,"pd.lreshape(df, {'D': ['B', 'C']})" |
"For each row, what is the fastest way to find the column holding nth element that is not NaN?",(df.notnull().cumsum(axis=1) == 4).idxmax(axis=1) |
Turning tuples into a pairwise string,""""""", """""".join('%s(%.02f)' % (x, y) for x, y in tuplelist)" |
How to render a doctype with Python's xml.dom.minidom?,print(doc.toxml()) |
count each element in list without .count,"Counter(['a', 'b', 'a', 'c', 'b', 'a', 'c'])" |
Reading data from a CSV file online in Python 3,datareader = csv.reader(webpage.read().decode('utf-8').splitlines()) |
Python float to Decimal conversion,"format(f, '.15g')" |
How do I limit the border size on a matplotlib graph?,ax.set_title('Title') |
Pythonic way to append list of strings to an array,entry_list.extend([entry.title.text for entry in feed.entry]) |
How to switch two elements in string using Python RegEx?,"pattern.sub('A*\\3\\2\\1*', s)" |
Cut within a pattern using Python regex,"re.split('(?<=CDE)(\\w+)(?=FG)', s)" |
stack bar plot in matplotlib and add label to each section (and suggestions),plt.show() |
Get browser version using selenium webdriver,print(driver.capabilities['version']) |
python filter list of dictionaries based on key value,list([d for d in exampleSet if d['type'] in keyValList]) |
Set legend symbol opacity with matplotlib?,plt.legend() |
How can I use a pseudoterminal in python to emulate a serial port?,time.sleep(3) |
Maintain strings when converting python list into numpy structured array,"numpy.array(data, dtype=[('label', str), ('x', float), ('y', float)])" |
Flask instanciation app = Flask(),app = Flask(__name__) |
Delete Column in Pandas based on Condition,"df = df.loc[:, ((df != 0).any(axis=0))]" |
What is the most pythonic way to avoid specifying the same value in a string,"""""""hello {0}, how are you {0}, welcome {0}"""""".format('john')" |
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