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how to use os.umask() in python | os.close(fh2) |
how to build and fill pandas dataframe from for loop? | pd.DataFrame(d) |
list of ints into a list of tuples python | print(zip(my_list[0::2], my_list[1::2])) |
add a path `/path/to/2014_07_13_test` to system path | sys.path.append('/path/to/2014_07_13_test') |
string formatting in python: can i use %s for all types? | """Integer: {}; Float: {}; String: {}""".format(a, b, c) |
python . how to get rid of '\r' in string? | line.strip() |
can i set user-defined variable in python mysqldb? | cursor.execute('SELECT @X:=@X+1 FROM some_table') |
python: value of dictionary is list of strings | ast.literal_eval(reclist) |
how to save the pandas dataframe/series data as a figure? | fig.savefig('asdf.png') |
extract date from a string 'monkey 20/01/1980 love banana' | dparser.parse('monkey 20/01/1980 love banana', fuzzy=True) |
numpy int array: find indices of multiple target ints | np.where(np.in1d(values, searchvals)) |
list duplicated elements in two lists `lista` and `listb` | list(set(listA) & set(listB)) |
convert pandas dataframe `df` to a dictionary using `id` field as the key | df.set_index('id').to_dict() |
how to change fontsize in excel using python | worksheet.write(1, 0, label='Formatted value', style=style) |
strip html from strings in python | re.sub('<[^<]+?>', '', text) |
using selenium in python to click/select a radio button | browser.find_elements_by_css("input[type='radio'][value='SRF']").click |
driver python for postgresql | session.commit() |
get value at index `[2, 0]` in dataframe `df` | df.iloc[2, 0] |
convert binary string to numpy array | np.fromstring('\x00\x00\x80?\x00\x00\x00@\x00\x00@@\x00\x00\x80@', dtype='>f4') |
transpose a matrix in python | [[1, 2, 3], [4, 5, 6], [7, 8, 9]] |
remove identical items from list `my_list` and sort it alphabetically | sorted(set(my_list)) |
how to convert from boolean array to int array in python | new_data = np.vectorize(boolstr_to_floatstr)(data).astype(float) |
using pyodbc on ubuntu to insert a image field on sql server | cur.execute('SET TEXTSIZE 2147483647 SELECT myimage FROM testing WHERE id = 1') |
unescaping characters in a string with python | """\\u003Cp\\u003E""".decode('unicode-escape') |
how to find duplicate elements in array using for loop in python? | [i for i in y if y[i] == 1] |
indirect inline in django admin | admin.site.register(User, UserAdmin) |
anaphoric list comprehension in python | [s for s in (square(x) for x in range(12)) if s > 50] |
parsing json with python: blank fields | entries['extensions'].get('telephone') |
restart a computer after `900` seconds using subprocess | subprocess.call(['shutdown', '/r', '/t', '900']) |
numpy: unexpected result when dividing a vertical array by one of its own elements | x = np.random.rand(5, 1) |
regular expression syntax for "match nothing"? | re.compile('$^') |
applying functions to groups in pandas dataframe | df.groupby('type').apply(foo) |
extracting a number from a 1-word string | [int(s) for s in I.split() if s.isdigit()] |
creating a matrix of options using itertools | itertools.product([False, True], repeat=5) |
converting integer to list in python | map(int, str(num)) |
python print unicode doesn't show correct symbols | print(myunicode.encode('utf-8')) |
how can i programmatically authenticate a user in django? | return HttpResponseRedirect('/splash/') |
how do i remove whitespace from the end of a string in python? | """ xyz """.rstrip() |
how to clear os.environ value for only one variable in python | os.environ.pop('PYTHONHOME') |
python sort multidimensional array based on 2nd element of subarray | sorted(lst, key=operator.itemgetter(1), reverse=True) |
in python 2.4, how can i execute external commands with csh instead of bash? | os.system("zsh -c 'echo $0'") |
reading tab delimited csv into numpy array with different data types | np.genfromtxt(txt, delimiter='\t', dtype='str') |
replace only first occurence of string `test` from a string `longlongteststringtest` | 'longlongTESTstringTEST'.replace('TEST', '?', 1) |
how to annotate text along curved lines in python? | plt.xlabel('X') |
how to close a tkinter window by pressing a button? | window.destroy() |
how to retrieve row and column names from data frame? | cmat.stack().to_frame('item').query('.3 < item < .9') |
get keys from a dictionary 'd' where the value is '1'. | print([key for key, value in list(d.items()) if value == 1]) |
convert nan values to 'n/a' while reading rows from a csv `read_csv` with pandas | df = pd.read_csv('my.csv', na_values=['n/a']) |
finding index of the same elements in a list | [i for i in range(len(word)) if word[i] == letter] |
delete all occureces of `8` in each string `s` in list `lst` | print([s.replace('8', '') for s in lst]) |
how do i include unicode strings in python doctests? | mylen('\xe1\xe9\xed\xf3\xfa') |
how can i create stacked line graph with matplotlib? | plt.show() |
remove nan from pandas series | s.dropna() |
django: grab a set of objects from id list (and sort by timestamp) | objects = Model.objects.filter(id__in=object_ids).order_by('-timestamp') |
how to create a password entry field using tkinter | myEntry.config(show='*') |
getting a dictionary value where part of the key is in a string | {i: functools.reduce(dict.__getitem__, keys, d[i]) for i in d} |
python combining two logics of map() | map(partial(f, x), y) == map(f, [x] * len(y), y) |
replace part of a string in python? | stuff.replace(' and ', '/') |
format a string `u'andr\xc3\xa9'` that has unicode characters | """""".join(chr(ord(c)) for c in 'Andr\xc3\xa9') |
python matplotlib - how to specify values on y axis? | plt.plot(x, y) |
creating dictionary from space separated key=value string in python | {k: v.strip('"') for k, v in re.findall('(\\S+)=(".*?"|\\S+)', s)} |
regular expression "^(.+)\\n((?:\\n.+)+)" matching a multiline block of text | re.compile('^(.+)\\n((?:\\n.+)+)', re.MULTILINE) |
redirect prints to log file | logging.info('hello') |
stack bar plot in matplotlib and add label to each section (and suggestions) | plt.show() |
opposite of melt in python pandas | origin.pivot(index='label', columns='type')['value'] |
replace duplicate values across columns in pandas | pd.Series(['M', '0', 'M', '0']).duplicated() |
can a python method check if it has been called from within itself? | foo() |
reading a csv into pandas where one column is a json string | df = pandas.read_csv(f1, converters={'stats': CustomParser}, header=0) |
return a random word from a word list in python | return random.choice(words) |
sending a file over tcp sockets in python | s.send('Hello server!') |
merging a python script's subprocess' stdout and stderr while keeping them distinguishable | tsk = subprocess.Popen(args, stdout=subprocess.PIPE, stderr=subprocess.STDOUT) |
how to format print output into fixed width? | """{0: >5}""".format('ss') |
a list as a key for pyspark's reducebykey | rdd.map(lambda k_v: (tuple(k_v[0]), k_v[1])).groupByKey() |
get the directory path of absolute file path in python | os.path.dirname(fullpath) |
how to delete everything after a certain character in a string? | s = s.split('.zip', 1)[0] + '.zip' |
sort a multidimensional list by a variable number of keys | a.sort(key=operator.itemgetter(2, 3)) |
how do i fill two (or more) numpy arrays from a single iterable of tuples? | arr.sort(order=['f0', 'f1']) |
removing the first folder in a path | os.path.join(*x.split(os.path.sep)[2:]) |
convert generator object to a dictionary | {i: (i * 2) for i in range(10)} |
python - fastest way to check if a string contains specific characters in any of the items in a list | [(e in lestring) for e in lelist if e in lestring] |
regex for removing data in parenthesis | item = re.sub(' ?\\(\\w+\\)', '', item) |
can you create a python list from a string, while keeping characters in specific keywords together? | ['x', 'y', 'z', 'car', 'bus', 'a', 'b', 'c', 'car', '!'] |
get list of string elements in string `data` delimited by commas, putting `0` in place of empty strings | [(int(x) if x else 0) for x in data.split(',')] |
how to remove duplicates from a dataframe? | df = pd.DataFrame({'a': [1, 2, 3, 3, 3], 'b': [1, 2, None, 1, None]}) |
python pandas: drop rows of a timeserie based on time range | pd.concat([df[:start_remove], df[end_remove:]]) |
removing backslashes from string | print("\\I don't know why ///I don't have the right answer\\".strip('/')) |
how do i step through/debug a python web application? | pdb.set_trace() |
python: one-liner to perform an operation upon elements in a 2d array (list of lists)? | [list(map(int, x)) for x in values] |
how to count the total number of lines in a text file using python | count = sum(1 for line in myfile if line.rstrip('\n')) |
two combination lists from one list | print([[l[:i], l[i:]] for i in range(1, len(l))]) |
grouping pandas dataframe by n days starting in the begining of the day | df['dateonly'] = df['time'].apply(lambda x: x.date()) |
python/matplotlib - is there a way to make a discontinuous axis? | ax.set_xlim(0, 1) |
empty a list `lst` | lst[:] = [] |
how can i get an array of alternating values in python? | np.resize([1, -1], 10) |
splitting a string with multiple delimiters in python | re.split('[,;]+', 'This,is;a,;string') |
how to create a numpy array of all true or all false? | array([[True, True], [True, True]], dtype=bool) |
sort list of date strings | sorted(d, key=lambda x: datetime.datetime.strptime(x, '%m-%Y')) |
draw a line correlating zones between multiple subplots in matplotlib | plt.show() |
create tuples containing elements that are at the same index of list `lst` and list `lst2` | [(i, j) for i, j in zip(lst, lst2)] |
how do you programmatically set an attribute in python? | setattr(x, attr, 'magic') |
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