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53,513 | check if a list is empty | check if list `a` is empty | if (not a):
pass |
53,513 | check if a list is empty | check if list `seq` is empty | if (not seq):
pass |
53,513 | check if a list is empty | check if list `li` is empty | if (len(li) == 0):
pass |
13,717,463 | Find the indices of elements greater than x | create a list containing the indices of elements greater than 4 in list `a` | [i for i, v in enumerate(a) if v > 4] |
13,237,941 | sorting list of nested dictionaries in python | reverse list `yourdata` | sorted(yourdata, reverse=True) |
13,237,941 | sorting list of nested dictionaries in python | sort list of nested dictionaries `yourdata` in reverse based on values associated with each dictionary's key 'subkey' | sorted(yourdata, key=lambda d: d.get('key', {}).get('subkey'), reverse=True) |
13,237,941 | sorting list of nested dictionaries in python | sort list of nested dictionaries `yourdata` in reverse order of 'key' and 'subkey' | yourdata.sort(key=lambda e: e['key']['subkey'], reverse=True) |
37,084,812 | How to remove decimal points in pandas | remove decimal points in pandas data frame using round | df.round() |
8,938,449 | How to extract data from matplotlib plot | Get data from matplotlib plot | gca().get_lines()[n].get_xydata() |
37,125,495 | How to get the N maximum values per row in a numpy ndarray? | get the maximum 2 values per row in array `A` | A[:, -2:] |
23,531,030 | MultiValueDictKeyError in Django | Get value for "username" parameter in GET request in Django | request.GET.get('username', '') |
4,301,069 | Any way to properly pretty-print ordered dictionaries in Python? | pretty-print ordered dictionary `o` | pprint(dict(list(o.items()))) |
32,458,541 | Django can't find URL pattern | Confirm urls in Django properly | url('^$', include('sms.urls')), |
32,458,541 | Django can't find URL pattern | Configure url in django properly | url('^', include('sms.urls')), |
1,874,194 | Pythonic way to get the largest item in a list | 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)) |
1,874,194 | Pythonic way to get the largest item in a list | find tuple in list of tuples `a_list` with the largest second element | max(a_list, key=operator.itemgetter(1)) |
29,100,599 | How to iterate over time periods in pandas | resample series `s` into 3 months bins and sum each bin | s.resample('3M', how='sum') |
2,621,674 | how to extract elements from a list in python? | extract elements at indices (1, 2, 5) from a list `a` | [a[i] for i in (1, 2, 5)] |
5,245,058 | Python: Filter lines from a text file which contain a particular word | filter lines from a text file 'textfile' which contain a word 'apple' | [line for line in open('textfile') if 'apple' in line] |
2,721,782 | How to convert a Date string to a DateTime object? | convert a date string `s` to a datetime object | datetime.datetime.strptime(s, '%Y-%m-%dT%H:%M:%SZ') |
27,896,214 | Reading tab-delimited file with Pandas - works on Windows, but not on Mac | reading tab-delimited csv file `filename` with pandas on mac | pandas.read_csv(filename, sep='\t', lineterminator='\r') |
4,628,618 | Replace first occurence of string | replace only first occurence of string `TEST` from a string `longlongTESTstringTEST` | 'longlongTESTstringTEST'.replace('TEST', '?', 1) |
12,777,222 | How can I zip file with a flattened directory structure using Zipfile in Python? | zip file `pdffile` using its basename as directory name | archive.write(pdffile, os.path.basename(pdffile)) |
3,457,673 | Elegant way to create a dictionary of pairs, from a list of tuples? | create a dictionary of pairs from a list of tuples `myListOfTuples` | dict(x[1:] for x in reversed(myListOfTuples)) |
8,194,156 | How to subtract two lists in python | subtract elements of list `List1` from elements of list `List2` | [(x1 - x2) for x1, x2 in zip(List1, List2)] |
5,577,501 | How to tell if string starts with a number? | check if string `string` starts with a number | string[0].isdigit() |
5,577,501 | How to tell if string starts with a number? | Check if string `strg` starts with any of the elements in list ('0', '1', '2', '3', '4', '5', '6', '7', '8', '9') | strg.startswith(('0', '1', '2', '3', '4', '5', '6', '7', '8', '9')) |
4,934,806 | How can I find script's directory with Python? | print script's directory | print(os.path.dirname(os.path.realpath(__file__))) |
15,530,399 | Finding the surrounding sentence of a char/word in a string | split string `text` by the occurrences of regex pattern '(?<=\\?|!|\\.)\\s{0,2}(?=[A-Z]|$)' | re.split('(?<=\\?|!|\\.)\\s{0,2}(?=[A-Z]|$)', text) |
21,519,203 | Plotting a list of (x, y) coordinates in python matplotlib | Make a scatter plot using unpacked values of list `li` | plt.scatter(*zip(*li)) |
16,040,156 | Rearrange tuple of tuples in Python | rearrange tuple of tuples `t` | tuple(zip(*t)) |
40,963,347 | Find Average of Every Three Columns in Pandas dataframe | Get average for every three columns in `df` dataframe | df.groupby(np.arange(len(df.columns)) // 3, axis=1).mean() |
180,606 | How do I convert a list of ascii values to a string in python? | convert a list `L` of ascii values to a string | """""".join(chr(i) for i in L) |
13,462,365 | Python 2.7 Counting number of dictionary items with given value | count the number of pairs in dictionary `d` whose value equal to `chosen_value` | sum(x == chosen_value for x in list(d.values())) |
13,462,365 | Python 2.7 Counting number of dictionary items with given value | count the number of values in `d` dictionary that are predicate to function `some_condition` | sum(1 for x in list(d.values()) if some_condition(x)) |
13,291,539 | convert double to float in Python | convert double 0.00582811585976 to float | struct.unpack('f', struct.pack('f', 0.00582811585976)) |
8,777,753 | Converting datetime.date to UTC timestamp in Python | convert datetime.date `dt` to utc timestamp | timestamp = (dt - datetime(1970, 1, 1)).total_seconds() |
13,838,405 | Custom sorting in pandas dataframe | sort column `m` in panda dataframe `df` | df.sort('m') |
3,766,633 | How to sort with lambda in Python | Sort a data `a` in descending order based on the `modified` attribute of elements using lambda function | a = sorted(a, key=lambda x: x.modified, reverse=True) |
39,604,780 | How can I print the Truth value of a variable? | print the truth value of `a` | print(bool(a)) |
42,142,756 | How can I change a specific row label in a Pandas dataframe? | rename `last` row index label in dataframe `df` to `a` | df = df.rename(index={last: 'a'}) |
28,416,408 | Scikit-learn: How to run KMeans on a one-dimensional array? | Fit Kmeans function to a one-dimensional array `x` by reshaping it to be a multidimensional array of single values | km.fit(x.reshape(-1, 1)) |
17,608,210 | sorting a list in python | Sort a list of strings 'words' such that items starting with 's' come first. | sorted(words, key=lambda x: 'a' + x if x.startswith('s') else 'b' + x) |
21,414,159 | login to a site using python and opening the login site in the browser | open the login site 'http://somesite.com/adminpanel/index.php' in the browser | webbrowser.open('http://somesite.com/adminpanel/index.php') |
8,654,637 | Pythonic way to fetch all elements in a dictionary, falling between two keys? | fetch all elements in a dictionary `parent_dict`, falling between two keys 2 and 4 | dict((k, v) for k, v in parent_dict.items() if 2 < k < 4) |
8,654,637 | Pythonic way to fetch all elements in a dictionary, falling between two keys? | fetch all elements in a dictionary 'parent_dict' where the key is between the range of 2 to 4 | dict((k, v) for k, v in parent_dict.items() if k > 2 and k < 4) |
13,668,393 | python sorting two lists | sort two lists `list1` and `list2` together using lambda function | [list(x) for x in zip(*sorted(zip(list1, list2), key=lambda pair: pair[0]))] |
10,543,303 | number of values in a list greater than a certain number | get the number of values in list `j` that is greater than 5 | sum(((i > 5) for i in j)) |
10,543,303 | number of values in a list greater than a certain number | get the number of values in list `j` that is greater than 5 | len([1 for i in j if (i > 5)]) |
10,543,303 | number of values in a list greater than a certain number | get the number of values in list `j` that is greater than `i` | j = np.array(j)
sum((j > i)) |
12,655,007 | Python: elegant way of creating a list of tuples? | zip list `a`, `b`, `c` into a list of tuples | [(x + tuple(y)) for x, y in zip(zip(a, b), c)] |
16,249,440 | Changing file permission in python | changing permission of file `path` to `stat.S_IRUSR | stat.S_IRGRP | stat.S_IROTH` | os.chmod(path, stat.S_IRUSR | stat.S_IRGRP | stat.S_IROTH) |
26,727,314 | Multiple files for one argument in argparse Python 2.7 | argparse associate zero or more arguments with flag 'file' | parser.add_argument('file', nargs='*') |
32,996,293 | Comparing values in two lists in Python | get a list of booleans `z` that shows wether the corresponding items in list `x` and `y` are equal | z = [(i == j) for i, j in zip(x, y)] |
32,996,293 | Comparing values in two lists in Python | create a list which indicates whether each element in `x` and `y` is identical | [(x[i] == y[i]) for i in range(len(x))] |
4,289,331 | Python: Extract numbers from a string | null | [int(s) for s in re.findall('\\b\\d+\\b', "he33llo 42 I'm a 32 string 30")] |
18,176,933 | Create an empty data frame with index from another data frame | create an empty data frame `df2` with index from another data frame `df1` | df2 = pd.DataFrame(index=df1.index) |
826,284 | How do I convert a string 2 bytes long to an integer in python | unpack first and second bytes of byte string `pS` into integer | struct.unpack('h', pS[0:2]) |
16,677,816 | Printing lists onto tables in python | print list `t` into a table-like shape | print('\n'.join(' '.join(map(str, row)) for row in t)) |
28,161,356 | Sort Pandas Dataframe by Date | null | df.sort_values(by='Date') |
14,442,636 | How can I check if a checkbox is checked in Selenium Python Webdriver? | check if a checkbox is checked in selenium python webdriver | driver.find_element_by_name('<check_box_name>').is_selected() |
14,442,636 | How can I check if a checkbox is checked in Selenium Python Webdriver? | determine if checkbox with id '<check_box_id>' is checked in selenium python webdriver | driver.find_element_by_id('<check_box_id>').is_selected() |
2,951,701 | Is it possible to use 'else' in a python list comprehension? | replace `0` with `2` in the list `[0, 1, 0, 3]` | [(a if a else 2) for a in [0, 1, 0, 3]] |
30,747,705 | Parsing string containing Unicode character names | Produce a string that is suitable as Unicode literal from string 'M\\N{AMPERSAND}M\\N{APOSTROPHE}s' | 'M\\N{AMPERSAND}M\\N{APOSTROPHE}s'.encode().decode('unicode-escape') |
30,747,705 | Parsing string containing Unicode character names | Parse a unicode string `M\\N{AMPERSAND}M\\N{APOSTROPHE}s` | 'M\\N{AMPERSAND}M\\N{APOSTROPHE}s'.decode('unicode-escape') |
867,866 | Convert unicode codepoint to UTF8 hex in python | convert Unicode codepoint to utf8 hex | chr(int('fd9b', 16)).encode('utf-8') |
13,277,440 | How can I get Python to use upper case letters to print hex values? | use upper case letters to print hex value `value` | print('0x%X' % value) |
16,099,694 | How to remove empty string in a list? | get a list `cleaned` that contains all non-empty elements in list `your_list` | cleaned = [x for x in your_list if x] |
13,324,554 | Python: Want to use a string as a slice specifier | create a slice object using string `string_slice` | slice(*[(int(i.strip()) if i else None) for i in string_slice.split(':')]) |
24,748,445 | Beautiful Soup Using Regex to Find Tags? | Find all the tags `a` and `div` from Beautiful Soup object `soup` | soup.find_all(['a', 'div']) |
7,142,062 | Get function name as a string in python | get the name of function `func` as a string | print(func.__name__) |
10,472,907 | How to convert dictionary into string | convert dictionary `adict` into string | """""".join('{}{}'.format(key, val) for key, val in sorted(adict.items())) |
10,472,907 | How to convert dictionary into string | convert dictionary `adict` into string | """""".join('{}{}'.format(key, val) for key, val in list(adict.items())) |
2,612,802 | copy a list | copy list `old_list` as `new_list` | new_list = old_list[:] |
2,612,802 | copy a list | copy list `old_list` as `new_list` | new_list = list(old_list) |
2,612,802 | copy a list | copy list `old_list` as `new_list` | new_list = copy.copy(old_list) |
2,612,802 | copy a list | deep copy list `old_list` as `new_list` | new_list = copy.deepcopy(old_list) |
2,612,802 | copy a list | make a copy of list `old_list` | [i for i in old_list] |
25,540,259 | Remove or adapt border of frame of legend using matplotlib | remove frame of legend in plot `plt` | plt.legend(frameon=False) |
38,147,259 | How to work with surrogate pairs in Python? | Print a emoji from a string `\\ud83d\\ude4f` having surrogate pairs | """\\ud83d\\ude4f""".encode('utf-16', 'surrogatepass').decode('utf-16') |
3,061 | Calling a function of a module from a string with the function's name in Python | calling a function named 'myfunction' in the module | globals()['myfunction']() |
1,949,318 | Checking if a website is up | Check the status code of url "http://www.stackoverflow.com" | urllib.request.urlopen('http://www.stackoverflow.com').getcode() |
1,949,318 | Checking if a website is up | Check the status code of url "www.python.org" | conn = httplib.HTTPConnection('www.python.org')
conn.request('HEAD', '/')
r1 = conn.getresponse()
print(r1.status, r1.reason) |
1,949,318 | Checking if a website is up | Check the status code of url `url` | r = requests.head(url)
return (r.status_code == 200) |
1,949,318 | Checking if a website is up | Checking if website "http://www.stackoverflow.com" is up | print(urllib.request.urlopen('http://www.stackoverflow.com').getcode()) |
23,931,444 | Selenium open pop up window [Python] | Selenium `driver` click a hyperlink with the pattern "a[href^='javascript']" | driver.find_element_by_css_selector("a[href^='javascript']").click() |
17,098,654 | How to store data frame using PANDAS, Python | store data frame `df` to file `file_name` using pandas, python | df.to_pickle(file_name) |
40,311,987 | Pandas: Mean of columns with the same names | calculate the mean of columns with same name in dataframe `df` | df.groupby(by=df.columns, axis=1).mean() |
4,768,151 | How to perform double sort inside an array? | 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) |
1,962,795 | How to get alpha value of a PNG image with PIL? | get alpha value `alpha` of a png image `img` | alpha = img.split()[-1] |
22,749,706 | How to get the length of words in a sentence? | null | [len(x) for x in s.split()] |
3,945,750 | Find a specific tag with BeautifulSoup | BeautifulSoup find tag 'div' with styling 'width=300px;' in HTML string `soup` | soup.findAll('div', style='width=300px;') |
9,336,270 | Using a Python dict for a SQL INSERT statement | Execute SQL statement `sql` with values of dictionary `myDict` as parameters | cursor.execute(sql, list(myDict.values())) |
32,533,944 | Preserving Column Order - Python Pandas and Column Concat | Convert CSV file `Result.csv` to Pandas dataframe using separator ' ' | df.to_csv('Result.csv', index=False, sep=' ') |
8,306,171 | Python: Extract variables out of namespace | update the `globals()` dictionary with the contents of the `vars(args)` dictionary | globals().update(vars(args)) |
9,889,635 | Regular expression to return all characters between two special characters | find all substrings in `mystring` beginning and ending with square brackets | re.findall('\\[(.*?)\\]', mystring) |
2,075,128 | Python, print all floats to 2 decimal places in output | Format all floating variables `var1`, `var2`, `var3`, `var1` to print to two decimal places. | print('%.2f kg = %.2f lb = %.2f gal = %.2f l' % (var1, var2, var3, var4)) |
8,425,046 | The best way to filter a dictionary in Python | Remove all items from a dictionary `d` where the values are less than `1` | d = dict((k, v) for k, v in d.items() if v > 0) |
8,425,046 | The best way to filter a dictionary in Python | Filter dictionary `d` to have items with value greater than 0 | d = {k: v for k, v in list(d.items()) if v > 0} |
17,690,738 | In Pandas how do I convert a string of date strings to datetime objects and put them in a DataFrame? | convert a string of date strings `date_stngs ` to datetime objects and put them in a dataframe | pd.to_datetime(pd.Series(date_stngs)) |
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