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How to check if a value exists in a dictionary (python),type(iter(d.values())) |
Optional get parameters in django?,"url('^so/(?P<required>\\d+)/', include('myapp.required_urls'))" |
Consequences of abusing nltk's word_tokenize(sent),"nltk.tokenize.word_tokenize('Hello, world.')" |
Getting the total number of lines in a Tkinter Text widget?,int(text_widget.index('end-1c').split('.')[0]) |
Normalize columns of pandas data frame,df = df / df.max().astype(np.float64) |
Python repeat string,print('{0} {0}'.format(s[:5])) |
Using Python Regular Expression in Django,"""""""^org/(?P<company_name>\\w+)/$""""""" |
find xml element based on its attribute and change its value,"elem.find('.//number[@topic=""sys/phoneNumber/1""]')" |
Copying data from S3 to AWS redshift using python and psycopg2,conn.commit() |
Python: sorting dictionary of dictionaries,"sorted(dic, key=lambda x: dic[x].get('Fisher', float('inf')))" |
Python - json without whitespaces,"json.dumps(separators=(',', ':'))" |
How to generate random colors in matplotlib?,plt.show() |
Find and replace string values in Python list,"words = [word.replace('[br]', '<br />') for word in words]" |
Python Pandas- Merging two data frames based on an index order,df1['cumcount'] = df1.groupby('val1').cumcount() |
Print file age in seconds using Python,print('mdatetime = {}'.format(datetime.datetime.fromtimestamp(mtime))) |
"python, Json and string indices must be integers, not str",accesstoken = retdict['access_token'] |
Python: Lambda function in List Comprehensions,[(lambda x: x * i) for i in range(4)] |
How to convert SQL Query result to PANDAS Data Structure?,"df = pd.read_sql(sql, cnxn)" |
How do I get the name of a python class as a string?,test.__name__ |
Changing marker style in scatter plot according to third variable,plt.show() |
How to find out if there is data to be read from stdin on Windows in Python?,os.isatty(sys.stdin.fileno()) |
Compare Python Pandas DataFrames for matching rows,"pd.merge(df1, df2, on=common_cols, how='inner')" |
Changing time frequency in Pandas Dataframe,"new = df.resample('T', how='mean')" |
How to find and count emoticons in a string using python?,wordcount = len(s.split()) |
"""TypeError: string indices must be integers"" when trying to make 2D array in python","Tablero = array('b', [Boardsize, Boardsize])" |
How would I go about playing an alarm sound in python?,os.system('beep') |
Python regexp groups: how do I get all groups?,"re.findall('[a-z]+', s)" |
"sigmoidal regression with scipy, numpy, python, etc","scipy.optimize.leastsq(residuals, p_guess, args=(x, y))" |
"Displaying numbers with ""X"" instead of ""e"" scientific notation in matplotlib",plt.show() |
"Resize matrix by repeating copies of it, in python","array([[0, 1, 0, 1, 0, 1, 0], [2, 3, 2, 3, 2, 3, 2]])" |
How to decrement a variable while printing in Python?,print(decrement()) |
efficient way to compress a numpy array (python),"my_array.compress([(x in ['this', 'that']) for x in my_array['job']])" |
What's the simplest way of detecting keyboard input in python from the terminal?,"termios.tcsetattr(fd, termios.TCSADRAIN, old_settings)" |
How to specify the endiannes directly in the numpy datatype for a 16bit unsigned integer?,"np.memmap('test.bin', dtype=np.dtype('>u2'), mode='r')" |
convert list of tuples to multiple lists in Python,"zip(*[(1, 2), (3, 4), (5, 6)])" |
Congruency Table in Pandas (Pearson Correlation between each row for every row pair),"df.corr().mask(np.equal.outer(df.index.values, df.columns.values))" |
Conditionally passing arbitrary number of default named arguments to a function,"func('arg', 'arg2', 'some value' if condition else None)" |
Sending ASCII Command using PySerial,ser.write('open1\r\n') |
Python: How to make a list of n numbers and randomly select any number?,random.choice(mylist) |
Is there a simple way to change a column of yes/no to 1/0 in a Pandas dataframe?,"pd.Series(np.searchsorted(['no', 'yes'], sample.housing.values), sample.index)" |
Iterate a list of tuples,"tuple_list = [(a, some_process(b)) for a, b in tuple_list]" |
Python concatenate string & list,""""""", """""".join(str(f) for f in fruits)" |
Find index of last occurrence of a substring in a string,s.rfind('l') |
How do you select choices in a form using Python?,form['FORM1'] = ['Value1'] |
Python: Convert unicode string to MM/DD/YYYY,"datetime.datetime.strptime('Mar232012', '%b%d%Y').strftime('%m/%d/%Y')" |
How to use symbolic group name using re.findall(),"[{'toto': '1', 'bip': 'xyz'}, {'toto': '15', 'bip': 'abu'}]" |
Splitting Numpy array based on value,zeros = np.where(a == 0)[0] |
Splitting integer in Python?,[int(i) for i in str(12345)] |
How to get the label of a choice in a Django forms ChoiceField?,{{OBJNAME.get_FIELDNAME_display}} |
python subprocess with gzip,p.stdin.close() |
text with unicode escape sequences to unicode in python,print('test \\u0259'.decode('unicode-escape')) |
How do convert unicode escape sequences to unicode characters in a python string,print(name.decode('latin-1')) |
How to write unicode strings into a file?,f.write(s) |
How can I color Python logging output?,logging.error('some error') |
Python Checking a string's first and last character,"print('hi' if str1.startswith('""') and str1.endswith('""') else 'fails')" |
Sort order of lists in multidimensional array in Python,"test = sorted(test, key=lambda x: len(x) if type(x) == list else 1)" |
Writing to a file in a for loop,text_file.close() |
Setting a clip on a seaborn plot,"sns.kdeplot(x=points['x_coord'], y=points['y_coord'], ax=ax)" |
How can I build a recursive function in python?,sys.setrecursionlimit() |
Vertical text in Tkinter Canvas,root.mainloop() |
How to subtract one from every value in a tuple in Python?,"holes = [(table[i][1] + 1, table[i + 1][0] - 1) for i in range(len(table) - 1)]" |
Cookies with urllib2 and PyWebKitGtk,opener = urllib.request.build_opener(urllib.request.HTTPCookieProcessor(cj)) |
Importing a local variable in a function into timeit,time = timeit.timeit(lambda : module.expensive_func(data)) |
"Python ""extend"" for a dictionary",a.update(b) |
Multiplying values from two different dictionaries together in Python,"{k: (v * dict2[k]) for k, v in list(dict1.items()) if k in dict2}" |
Python - Return rows after a certain date where a condition is met,df.groupby('deviceid').apply(after_purchase) |
Python - dump dict as a json string,json.dumps(fu) |
Python - How can I do a string find on a Unicode character that is a variable?,zzz = 'foo' |
How to center a window on the screen in Tkinter?,root.title('Not centered') |
how to convert a python dict object to a java equivalent object?,"map.put(key, new_value)" |
How do I attach event bindings to items on a canvas using Tkinter?,root.mainloop() |
How to create a dict with letters as keys in a concise way?,"dic = dict((y, x) for x, y in enumerate(al, 1))" |
How to retrieve table names in a mysql database with Python and MySQLdb?,cursor.execute('USE mydatabase') |
How do you count cars in OpenCV with Python?,img = cv2.imread('parking_lot.jpg') |
What's a quick one-liner to remove empty lines from a python string?,text = os.linesep.join([s for s in text.splitlines() if s]) |
Importing financial data into Python Pandas using read_csv,"data.loc[0, 'transaction_amount']" |
Split a list into nested lists on a value,"[[1, 4], [6, 9], [3, 9, 4]]" |
How do I raise the same Exception with a custom message in Python?,print(' got error of type ' + str(type(e)) + ' with message ' + e.message) |
convert integer to binary,"your_list = map(int, '{:b}'.format(your_int))" |
"Python-Matplotlib boxplot. How to show percentiles 0,10,25,50,75,90 and 100?",plt.show() |
How to get the values from a NumPy array using multiple indices,"arr[[1, 4, 5]]" |
Is there a way to split a string by every nth separator in Python?,"print(['-'.join(words[i:i + span]) for i in range(0, len(words), span)])" |
What are the guidelines to allow customizable logging from a Python module?,logger = logging.getLogger(__name__) |
Dynamically add subplots in matplotlib with more than one column,fig.tight_layout() |
Python regex alternative for join,"re.sub('(?<=.)(?=.)', '-', string)" |
CherryPy interferes with Twisted shutting down on Windows,cherrypy.engine.start() |
Move a tkinter canvas with Mouse,root.mainloop() |
How to convert integer value to array of four bytes in python,"map(ord, tuple(struct.pack('!I', number)))" |
Remove column from multi index dataframe,df.columns = pd.MultiIndex.from_tuples(df.columns.to_series()) |
Extract external contour or silhouette of image in Python,"contour(im, levels=[245], colors='black', origin='image')" |
Remove items from a list while iterating,somelist[:] = [x for x in somelist if not determine(x)] |
efficient way to count the element in a dictionary in Python using a loop,{x[0]: len(list(x[1])) for x in itertools.groupby(sorted(mylist))} |
Reading tab delimited csv into numpy array with different data types,"np.genfromtxt(txt, delimiter='\t', dtype='6int,S20')" |
Is it possible to have multiple statements in a python lambda expression?,"(lambda x, f: list(y[1] for y in f(x)))(lst, lambda x: (sorted(y) for y in x))" |
How can I do a batch insert into an Oracle database using Python?,connection.commit() |
Python: how to calculate the sum of a list without creating the whole list first?,sum(a) |
How do I match zero or more brackets in python regex,"re.sub('\\[.*\\]|\\{.*\\}', '', one)" |
How to set pdb break condition from within source code?,pdb.set_trace() |
How to check if a python module exists without importing it,imp.find_module('eggs') |
how to move identical elements in numpy array into subarrays,"np.split(a, np.nonzero(np.diff(a))[0] + 1)" |
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