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how to assign unique identifier to dataframe row,df.head(10)
appending to list in python dictionary,"dates_dict.setdefault(key, []).append(date)"
random byte string in python,"buf = '\x00' + ''.join(chr(random.randint(0, 255)) for _ in range(4)) + '\x00'"
how to write integers to a file,"file.write('%s %s %s' % (ranks[a], ranks[b], count))"
iterate over a dictionary `dict` in sorted order,return sorted(dict.items())
tuple digits to number conversion,float(str(a[0]) + '.' + str(a[1]))
convert list to a list of tuples python,zip(*it)
how to map 2 lists with comparison in python,"[{'y': 2, 'location': 2}, {'z': 3, 'location': 2}]"
how do i get the name from a named tuple in python?,type(ham).__name__
is there a fast way to return sin and cos of the same value in python?,"a, b = np.sin(x), np.cos(x)"
sorting a set of values,"sorted(s, key=float)"
re.split with spaces in python,"re.findall('\\s+|\\S+', s)"
get a environment variable `debussy`,print(os.environ['DEBUSSY'])
what is the best way to create a string array in python?,strs = ['' for x in range(size)]
pandas. group by field and merge the values in a single row,df.set_index('id').stack().unstack()
finding consecutive segments in a pandas data frame,"df.reset_index().groupby(['A', 'block'])['index'].apply(np.array)"
fastest way to populate a 1d numpy array,"np.fromiter(a, dtype=np.float)"
python beautifulsoup give multiple tags to findall,"tags = soup.find_all(['hr', 'strong'])"
how to delete tkinter widgets from a window?,root.mainloop()
"regex in python to find words that follow pattern: vowel, consonant, vowel, consonant","""""""([aeiou]+[bcdfghjklmnpqrstvwxz]+)+"""""""
using a comparator function to sort,"sorted(subjects, operator.itemgetter(0), reverse=True)"
convert int to ascii and back in python,ord('a')
cartesian product of `x` and `y` array points into single array of 2d points,"numpy.dstack(numpy.meshgrid(x, y)).reshape(-1, 2)"
python pandas : group by in group by and average?,df.groupby(['cluster']).mean()
python - bulk select then insert from one db to another,cursor.execute('INSERT OR REPLACE INTO master.table1 SELECT * FROM table1')
how to: django template pass array and use it in javascript?,"['Afghanistan', 'Japan', 'United Arab Emirates']"
how to convert an h:mm:ss time string to seconds in python?,print(get_sec('0:00:25'))
how to split string into words that do not contain whitespaces in python?,"""""""This is a string"""""".split()"
unable to remove unicode char from column names in pandas,df.columns = [strip_non_ascii(x) for x in df.columns]
how to get a padded slice of a multidimensional array?,arr[-2:2]
what's a good approach to managing the db connection in a google cloud sql (gae) python app?,"cursor.execute('SELECT guestName, content, entryID FROM entries')"
getting seconds from numpy timedelta64,"np.diff(index) / np.timedelta64(1, 'm')"
printing a variable in an embedded python interpreter,Py_Finalize()
change unicode string into list?,"[float(i) for i in a.strip('{}').split(',')]"
how to remove whitespace from end of string in python?,"print('{}, you won!'.format(name))"
"missing data, insert rows in pandas and fill with nan",df.set_index('A')
string formatting in python,"print([1, 2, 3])"
how to get the size of tar.gz in (mb) file in python,os.path.getsize('flickrapi-1.2.tar.gz')
kill process with python,os.system('path/to/my_script.sh')
remove index 2 element from a list `my_list`,my_list.pop(2)
how to make a window jump to the front?,"root.attributes('-topmost', True)"
how to create range of numbers in python like in matlab,"print(np.linspace(1, 3, num=5))"
change figure size and figure format in matplotlib,"plt.figure(figsize=(3, 4))"
how do i disable log messages from the requests library?,logging.getLogger('urllib3').setLevel(logging.WARNING)
change one character in a string in python?,""""""""""""".join(s)"
python save to file,file.close()
draw a grid line on every tick of plot `plt`,plt.grid(True)
how to execute a command in the terminal from a python script?,subprocess.call('./driver.exe bondville.dat')
generate a sequence of numbers in python,""""""","""""".join(map(str, sorted(list(range(1, 100, 4))) + list(range(2, 100, 4))))"
"access environment variable ""home""",os.environ['HOME']
applying uppercase to a column in pandas dataframe,"df['1/2 ID'] = map(lambda x: x.upper(), df['1/2 ID'])"
delete none values from python dict,"D.update((k, v) for k, v in user.items() if v is not None)"
python/matplotlib - is there a way to make a discontinuous axis?,"ax2.plot(x, y, 'bo')"
how to write individual bits to a text file in python?,"open('file.bla', 'wb')"
how to add a string to every even row in a pandas dataframe column series?,print(df['New_Col'])
python requests getting sslerror,"requests.get('https://www.reporo.com/', verify='chain.pem')"
"get a sorted list of the characters of string `s` in lexicographic order, with lowercase letters first","sorted(s, key=str.lower)"
extend dictionary `a` with key/value pairs of dictionary `b`,a.update(b)
sum of all values in a python dict,sum(d.values())
"in pandas, why does tz_convert change the timezone used from est to lmt?",pytz.timezone('US/Eastern')
display a float with two decimal places in python,"""""""{0:.2f}"""""".format(5)"
getting a json request in a view (using django),return HttpResponse('')
get the count of each unique value in column `country` of dataframe `df` and store in column `sum of accidents`,df.Country.value_counts().reset_index(name='Sum of Accidents')
matplotlib colorbar for scatter,plt.show()
how to apply ceiling to pandas datetime,pd.Series(pd.PeriodIndex(df.date.dt.to_period('T') + 1).to_timestamp())
splitting a nested list into two lists,"my_list2, my_list1 = map(list, zip(*my_list))"
print the concatenation of the digits of two numbers in python,"print('%d%d' % (2, 1))"
how to check if an element from list a is not present in list b in python?,list([a for a in A if a not in B])
change permissions via ftp in python,ftp.quit()
how to apply ceiling to pandas datetime,"df.date + pd.to_timedelta(-df.date.dt.second % 60, unit='s')"
how to submit http authentication with selenium python-binding webdriver,driver.get('https://username:password@somewebsite.com/')
sub matrix of a list of lists (without numpy),[row[2:5] for row in LoL[1:4]]
merge a list of dictionaries in list `l` into a single dict,"{k: v for d in L for k, v in list(d.items())}"
how to check if two permutations are symmetric?,"Al = [al1, al2, al3, al4, al5, al6]"
python: how to escape 'lambda',"print(getattr(args, 'lambda'))"
python split string based on regular expression,"re.findall('\\S+', str1)"
load module from string in python,sys.modules['mymodule'] = mymodule
python: one-liner to perform an operation upon elements in a 2d array (list of lists)?,"[map(int, x) for x in values]"
how to determine a numpy-array reshape strategy,"arr = np.arange(3 * 4 * 5).reshape(3, 4, 5)"
my matplotlib title gets cropped,plt.subplots_adjust(top=0.5)
use of findall and parenthesis in python,"re.findall('\\b[A-Z]', formula)"
extracting key value pairs from string with quotes,"{'key1': 'value1', 'key2': 'value2,still_value2,not_key1=""not_value1""'}"
flask: using multiple packages in one app,app.run()
flask get posted form data 'firstname',first_name = request.form.get('firstname')
pythonic way to append list of strings to an array,entry_list.extend([entry.title.text for entry in feed.entry])
how to get http headers in flask?,request.headers['your-header-name']
python split string based on regular expression,"re.split(' +', str1)"
pygame - sound delay,pygame.init()
pandas dataframe to list,pd['a'].tolist()
convert a list to a dictionary in python,"dict((k, 2) for k in a)"
recursively replace characters in a dictionary,"{'delicious_apples': {'green_apples': 2}, 'green_pear': 4, 'brown_muffins': 5}"
looping through a list from a specific key to the end of the list,l[1:]
dynamic order in django-mptt,Comment.objects.all().order_by('-hotness')
regex matching 5-digit substrings not enclosed with digits in `s`,"re.findall('(?<!\\d)\\d{5}(?!\\d)', s)"
create a dataframe containing the multiplication of element-wise in dataframe `df` and dataframe `df2` using index name and column labels of dataframe `df`,"pd.DataFrame(df.values * df2.values, columns=df.columns, index=df.index)"
getting only element from a single-element list in python?,singleitem = next(iter(mylist))
convert an rgb image 'messi5.jpg' into grayscale `img`,"img = cv2.imread('messi5.jpg', 0)"
how to add a new row to an empty numpy array,"arr = np.empty((0, 3), int)"
batch renaming of files in a directory,"rename('c:\\temp\\xx', '*.doc', 'new(%s)')"
python pandas: plot histogram of dates?,"df.groupby([df.date.dt.year, df.date.dt.month]).count().plot(kind='bar')"