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"remove trailing newline in string ""test string\n""",'test string\n'.rstrip() |
how can i solve system of linear equations in sympy?,"linsolve(Matrix(([1, 1, 1, 1], [1, 1, 2, 3])), (x, y, z))" |
construct pandas dataframe from list of tuples,"df = pandas.DataFrame(data, columns=['R_Number', 'C_Number', 'Avg', 'Std'])" |
print a character that has unicode value `\u25b2`,print('\u25b2'.encode('utf-8')) |
python spliting a string,"a, b = 'string_without_spaces'.split(' ', 1)" |
set variable point size in matplotlib,"ax1.scatter(data[0], data[1], marker='o', c='b', s=data[2], label='the data')" |
python requests: post json and file in single request,"r = requests.post(url, files=files, data=data, headers=headers)" |
run app `app` on host '192.168.0.58' and port 9000 in flask,"app.run(host='192.168.0.58', port=9000, debug=False)" |
how can i select random characters in a pythonic way?,random.choice(string.ascii_letters + string.digits) |
python: how to count overlapping occurrences of a substring,"len([s.start() for s in re.finditer('(?=aa)', 'aaa')])" |
python pandas: apply a function with arguments to a series. update,"a['x'].apply(lambda x, y: x + y, args=(100,))" |
how do i translate a iso 8601 datetime string into a python datetime object?,yourdate = dateutil.parser.parse(datestring) |
python - how can i do a string find on a unicode character that is a variable?,"ast.literal_eval(""u'"" + zzz + ""'"")" |
how do i do a not equal in django queryset filtering?,Entry.objects.filter(~Q(id=3)) |
print numbers in list `list` with precision of 3 decimal places,"print('[%s]' % ', '.join('%.3f' % val for val in list))" |
how to combine the data from many data frames into a single data frame with an array as the data values,"p.apply(np.sum, axis='major')" |
how to add a new column to a csv file using python?,writer.writerows(all) |
how to edit model data using django forms,"form = MyModelForm(request.POST, instance=my_record)" |
opencv video saving in python,cv2.destroyAllWindows() |
pandas: create another column while splitting each row from the first column,"df['new_column'] = df['old_column'].apply(lambda x: '#' + x.replace(' ', ''))" |
converting integer `num` to list,[int(x) for x in str(num)] |
how to make python gracefully fail?,sys.exit(main()) |
multiplication of 1d arrays in numpy,"np.dot(np.atleast_2d(a).T, np.atleast_2d(b))" |
sqlite3 in python,c.execute('SELECT * FROM tbl') |
convert python datetime to epoch with strftime,"datetime.datetime(2012, 4, 1, 0, 0).timestamp()" |
divide two lists in python,"[(x * 1.0 / y) for x, y in zip(a, b)]" |
sort dict by value python,"sorted(list(data.items()), key=lambda x: x[1])" |
simple way of creating a 2d array with random numbers (python),[[random.random() for i in range(N)] for j in range(N)] |
how to extract all upper from a string? python,""""""""""""".join(c for c in s if c.isupper())" |
get column name where value is something in pandas dataframe,"df_result = pd.DataFrame(ts, columns=['value'])" |
how can i convert a url query string into a list of tuples using python?,"[('foo', 'bar'), ('key', 'val')]" |
sort list `bar` by each element's attribute `attrb1` and attribute `attrb2` in reverse order,"bar.sort(key=lambda x: (x.attrb1, x.attrb2), reverse=True)" |
python: most efficient way to convert date to datetime,"datetime(date.year, date.month, date.day)" |
get the tuple in list `a_list` that has the largest item in the second index,"max_item = max(a_list, key=operator.itemgetter(1))" |
switching keys and values in a dictionary in python,"my_dict2 = dict((y, x) for x, y in my_dict.items())" |
how to get tuples from lists using list comprehension in python,"[(lst[i], lst2[i]) for i in range(len(lst))]" |
how can i append this elements to an array in python?,"['1', '2', '3', '4', 'a', 'b', 'c', 'd']" |
get os name,"import platform |
platform.system()" |
how to write a tuple of tuples to a csv file using python,writer.writerows(A) |
"python, remove all occurrences of string in list",new_array = [x for x in main_array if x not in second_array] |
"how to change [1,2,3,4] to '1234' using python",""""""""""""".join(map(str, [1, 2, 3, 4]))" |
python - sum 4d array,M.sum(axis=0).sum(axis=0) |
how to get a value from every column in a numpy matrix,(M == 0).T.nonzero() |
how to generate negative random value in python,"random.uniform(-1, 1)" |
read hdf5 file to pandas dataframe with conditions,"pd.read_hdf('/tmp/out.h5', 'results_table', where='A in [1,3,4]')" |
finding the index of elements based on a condition using python list comprehension,[i for i in range(len(a)) if a[i] > 2] |
extract date from a string 'monkey 2010-07-32 love banana',"dparser.parse('monkey 2010-07-32 love banana', fuzzy=True)" |
convert a flat list to list of list in python,"[['a', 'b', 'c'], ['d', 'e', 'f']]" |
upload file with python mechanize,"br.form.add_file(open(filename), 'text/plain', filename)" |
"selenium `driver` click a hyperlink with the pattern ""a[href^='javascript']""","driver.find_element_by_css_selector(""a[href^='javascript']"").click()" |
how to implement jump in pygame without sprites?,pygame.display.flip() |
superscript in python plots,plt.show() |
how to read the file contents from a file?,"input = open(fullpath, 'rb')" |
get the indices in array `b` of each element appearing in array `a`,"np.in1d(b, a).nonzero()[0]" |
python: how to act on re's matched string,"re.sub('(\\d+)', lambda m: '%.0f' % (float(m.group(1)) * 2), 'test line 123')" |
find average of every three columns in pandas dataframe,"pd.concat([df, res], axis=1)" |
deploy flask app as windows service,app.run() |
interleave the elements of two lists `a` and `b`,"[j for i in zip(a, b) for j in i]" |
python: a4 size for a plot,"rc('figure', figsize=(11.69, 8.27))" |
how to export a table to csv or excel format,writer.writerows(cursor.fetchall()) |
how to perform double sort inside an array?,"bar.sort(key=lambda x: (x.attrb1, x.attrb2), reverse=True)" |
python: how to add three text files into one variable and then split it into a list,"msglist = [hextotal[i:i + 4096] for i in range(0, len(hextotal), 4096)]" |
python requests not working with google app engine,"r = http.request('GET', 'https://www.23andme.com/')" |
get a list of all keys from dictionary `dicta` where the number of occurrences of value `duck` in that key is more than `1`,"[k for k, v in dictA.items() if v.count('duck') > 1]" |
get last day of the month `month` in year `year`,"calendar.monthrange(year, month)[1]" |
concatenate an arbitrary number of lists in a function in python,"join_lists([1, 2, 3], [4, 5, 6])" |
sort a numpy array according to 2nd column only if values in 1st column are same,"a[np.lexsort(a[:, ::-1].T)]" |
how can i get all the plain text from a website with scrapy?,xpath('//body//text()').extract() |
how to remove all characters before a specific character in python?,"re.sub('.*I', 'I', stri)" |
why i can't convert a list of str to a list of floats?,"C = row[1].split(',')[1:-1]" |
how to filter model results for multiple values for a many to many field in django,"Group.objects.filter(player__name__in=['Player1', 'Player2'])" |
python - return rows after a certain date where a condition is met,df.groupby('deviceid').apply(after_purchase) |
python logging: use milliseconds in time format,"logging.Formatter(fmt='%(asctime)s.%(msecs)03d', datefmt='%Y-%m-%d,%H:%M:%S')" |
assigning string with boolean expression,openmode = 'w' |
sort a numpy array like a table,"array([[2, 1], [5, 1], [0, 3], [4, 5]])" |
"calling an external command ""some_command < input_file | another_command > output_file""",os.system('some_command < input_file | another_command > output_file') |
how to use `numpy.savez` in a loop for save more than one array?,"np.savez(tmp, *[getarray[0], getarray[1], getarray[8]])" |
generate list of numbers in specific format,[('%.2d' % i) for i in range(16)] |
non-consuming regular expression split in python,"re.split('(?<=[\\.\\?!]) ', text)" |
using a global dictionary with threads in python,global_dict['bar'] = 'hello' |
printing a list of numbers in python v.3,"print('\t'.join(map(str, [1, 2, 3, 4, 5])))" |
extract first column from a multi-dimensional array `a`,[row[0] for row in a] |
plot histogram of datetime.time python / matplotlib,plt.show() |
change user agent for selenium driver,driver.execute_script('return navigator.userAgent') |
check if a directory exists in a zip file with python,any(x.startswith('%s/' % name.rstrip('/')) for x in z.namelist()) |
convert a list of dictionaries `listofdict into a dictionary of dictionaries,"dict((d['name'], d) for d in listofdict)" |
sort list `xs` in ascending order of length of elements,"xs.sort(lambda x, y: cmp(len(x), len(y)))" |
search for string `blabla` in txt file 'example.txt',"datafile = file('example.txt') |
found = False |
for line in datafile: |
if (blabla in line): |
return True |
return False" |
how to change legend size with matplotlib.pyplot,"plot.legend(loc=2, prop={'size': 6})" |
encode unicode string '\xc5\xc4\xd6' to utf-8 code,print('\xc5\xc4\xd6'.encode('UTF8')) |
join data of dataframe `df1` with data in dataframe `df2` based on similar values of column 'user_id' in both dataframes,"s1 = pd.merge(df1, df2, how='inner', on=['user_id'])" |
python del if in dictionary in one line,"myDict.pop(key, None)" |
get a list of strings `split_text` with fixed chunk size `n` from a string `the_list`,"split_list = [the_list[i:i + n] for i in range(0, len(the_list), n)]" |
python pandas extract unique dates from time series,df['Date'][0] |
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