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1,400,608 | empty a list | empty a list `lst` | lst[:] = [] |
1,400,608 | empty a list | empty a list `alist` | alist[:] = [] |
18,624,039 | Pandas reset index on series to remove multiindex | reset index of series `s` | s.reset_index(0).reset_index(drop=True) |
36,623,789 | How to convert unicode text to normal text | convert unicode text from list `elems` with index 0 to normal text 'utf-8' | elems[0].getText().encode('utf-8') |
4,029,436 | Subtracting the current and previous item in a list | create a list containing the subtraction of each item in list `L` from the item prior to it | [(y - x) for x, y in zip(L, L[1:])] |
32,950,347 | Cleanest way to get a value from a list element | get value in string `line` matched by regex pattern '\\bLOG_ADDR\\s+(\\S+)' | print(re.search('\\bLOG_ADDR\\s+(\\S+)', line).group(1)) |
4,116,061 | Importing everything ( * ) dynamically from a module | import all classes from module `some.package` | globals().update(importlib.import_module('some.package').__dict__) |
4,481,724 | Convert a list of characters into a string | convert a list of characters `['a', 'b', 'c', 'd']` into a string | """""".join(['a', 'b', 'c', 'd']) |
258,746 | Slicing URL with Python | Slice `url` with '&' as delimiter to get "http://www.domainname.com/page?CONTENT_ITEM_ID=1234" from url "http://www.domainname.com/page?CONTENT_ITEM_ID=1234¶m2¶m3
" | url.split('&') |
9,001,509 | sort a dictionary by key | sort dictionary `d` by key | od = collections.OrderedDict(sorted(d.items())) |
9,001,509 | sort a dictionary by key | sort a dictionary `d` by key | OrderedDict(sorted(list(d.items()), key=(lambda t: t[0]))) |
33,127,636 | PUT Request to REST API using Python | Execute a put request to the url `url` | response = requests.put(url, data=json.dumps(data), headers=headers) |
6,323,296 | Python remove anything that is not a letter or number | replace everything that is not an alphabet or a digit with '' in 's'. | re.sub('[\\W_]+', '', s) |
16,568,056 | Python Nested List Comprehension with two Lists | create a list of aggregation of each element from list `l2` to all elements of list `l1` | [(x + y) for x in l2 for y in l1] |
1,246,444 | convert string to dict using list comprehension in python | convert string `x' to dictionary splitted by `=` using list comprehension | dict([x.split('=') for x in s.split()]) |
9,754,729 | Remove object from a list of objects in python | remove index 2 element from a list `my_list` | my_list.pop(2) |
3,559,559 | How to delete a character from a string using python? | Delete character "M" from a string `s` using python | s = s.replace('M', '') |
3,559,559 | How to delete a character from a string using python? | null | newstr = oldstr.replace('M', '') |
41,821,112 | How can I sum the product of two list items using for loop in python? | get the sum of the products of each pair of corresponding elements in lists `a` and `b` | sum(x * y for x, y in zip(a, b)) |
41,821,112 | How can I sum the product of two list items using for loop in python? | sum the products of each two elements at the same index of list `a` and list `b` | list(x * y for x, y in list(zip(a, b))) |
41,821,112 | How can I sum the product of two list items using for loop in python? | sum the product of each two items at the same index of list `a` and list `b` | sum(i * j for i, j in zip(a, b)) |
41,821,112 | How can I sum the product of two list items using for loop in python? | sum the product of elements of two lists named `a` and `b` | sum(x * y for x, y in list(zip(a, b))) |
12,426,043 | Can I read and write file in one line with Python? | write the content of file `xxx.mp4` to file `f` | f.write(open('xxx.mp4', 'rb').read()) |
9,304,408 | How to add an integer to each element in a list? | Add 1 to each integer value in list `my_list` | new_list = [(x + 1) for x in my_list] |
4,587,915 | Return list of items in list greater than some value | get a list of all items in list `j` with values greater than `5` | [x for x in j if x >= 5] |
8,409,095 | matplotlib: Set markers for individual points on a line | set color marker styles `--bo` in matplotlib | plt.plot(list(range(10)), '--bo') |
8,409,095 | matplotlib: Set markers for individual points on a line | set circle markers on plot for individual points defined in list `[1,2,3,4,5,6,7,8,9,10]` created by range(10) | plt.plot(list(range(10)), linestyle='--', marker='o', color='b') |
6,696,027 | split elements of a list in python | split strings in list `l` on the first occurring tab `\t` and enter only the first resulting substring in a new list | [i.split('\t', 1)[0] for i in l] |
6,696,027 | split elements of a list in python | Split each string in list `myList` on the tab character | myList = [i.split('\t')[0] for i in myList] |
11,344,827 | Summing elements in a list | Sum numbers in a list 'your_list' | sum(your_list) |
4,716,533 | How to attach debugger to a python subproccess? | attach debugger pdb to class `ForkedPdb` | ForkedPdb().set_trace() |
17,846,545 | Python: comprehension to compose two dictionaries | Compose keys from dictionary `d1` with respective values in dictionary `d2` | result = {k: d2.get(v) for k, v in list(d1.items())} |
6,310,475 | datetime.datetime.now() + 1 | add one day and three hours to the present time from datetime.now() | datetime.datetime.now() + datetime.timedelta(days=1, hours=3) |
1,386,811 | Convert binary string to list of integers using Python | null | [int(s[i:i + 3], 2) for i in range(0, len(s), 3)] |
8,305,518 | switching keys and values in a dictionary in python | switch keys and values in a dictionary `my_dict` | dict((v, k) for k, v in my_dict.items()) |
21,361,604 | Specific sort a list of numbers separated by dots | sort a list `L` by number after second '.' | print(sorted(L, key=lambda x: int(x.split('.')[2]))) |
17,149,561 | How to find a value in a list of python dictionaries? | Check if the value of the key "name" is "Test" in a list of dictionaries `label` | any(d['name'] == 'Test' for d in label) |
2,186,656 | How can I remove all instances of an element from a list in Python? | remove all instances of [1, 1] from list `a` | a[:] = [x for x in a if x != [1, 1]] |
2,186,656 | How can I remove all instances of an element from a list in Python? | remove all instances of `[1, 1]` from a list `a` | [x for x in a if x != [1, 1]] |
4,576,115 | Convert a list to a dictionary in Python | convert a list 'a' to a dictionary where each even element represents the key to the dictionary, and the following odd element is the value | b = {a[i]: a[i + 1] for i in range(0, len(a), 2)} |
3,899,782 | How to check whether elements appears in the list only once in python? | check whether elements in list `a` appear only once | len(set(a)) == len(a) |
3,431,825 | Generating an MD5 checksum of a file | Generate MD5 checksum of file in the path `full_path` in hashlib | print(hashlib.md5(open(full_path, 'rb').read()).hexdigest()) |
42,765,620 | How to sort a dictionary in python by value when the value is a list and I want to sort it by the first index of that list | null | sorted(list(data.items()), key=lambda x: x[1][0]) |
8,344,905 | Pythons fastest way of randomising case of a string | randomly switch letters' cases in string `s` | """""".join(x.upper() if random.randint(0, 1) else x for x in s) |
21,822,054 | How to force os.system() to use bash instead of shell | force bash interpreter '/bin/bash' to be used instead of shell | os.system('GREPDB="echo 123"; /bin/bash -c "$GREPDB"') |
21,822,054 | How to force os.system() to use bash instead of shell | Run a command `echo hello world` in bash instead of shell | os.system('/bin/bash -c "echo hello world"') |
13,303,100 | how to access the class variable by string in Python? | access the class variable `a_string` from a class object `test` | getattr(test, a_string) |
5,333,244 | How to display a jpg file in Python? | Display a image file `pathToFile` | Image.open('pathToFile').show() |
3,151,146 | Replace the single quote (') character from a string | replace single quote character in string "didn't" with empty string '' | """didn't""".replace("'", '') |
9,466,017 | Sorting files in a list | sort list `files` based on variable `file_number` | files.sort(key=file_number) |
8,270,092 | remove all whitespace in a string | remove all whitespace in a string `sentence` | sentence.replace(' ', '') |
8,270,092 | remove all whitespace in a string | remove all whitespace in a string `sentence` | pattern = re.compile('\\s+')
sentence = re.sub(pattern, '', sentence) |
8,270,092 | remove all whitespace in a string | remove whitespace in string `sentence` from beginning and end | sentence.strip() |
8,270,092 | remove all whitespace in a string | remove all whitespaces in string `sentence` | sentence = re.sub('\\s+', '', sentence, flags=re.UNICODE) |
8,270,092 | remove all whitespace in a string | remove all whitespaces in a string `sentence` | sentence = ''.join(sentence.split()) |
32,511,444 | Sum all values of a counter in Python | sum all the values in a counter variable `my_counter` | sum(my_counter.values()) |
40,319,433 | Numpy: find the euclidean distance between two 3-D arrays | find the euclidean distance between two 3-d arrays `A` and `B` | np.sqrt(((A - B) ** 2).sum(-1)) |
4,411,811 | Python: define multiple variables of same type? | create list `levels` containing 3 empty dictionaries | levels = [{}, {}, {}] |
6,133,434 | Find the sum of subsets of a list in python | find the sums of length 7 subsets of a list `daily` | weekly = [sum(visitors[x:x + 7]) for x in range(0, len(daily), 7)] |
5,844,672 | Delete an element from a dictionary | Delete an element `key` from a dictionary `d` | del d[key] |
5,844,672 | Delete an element from a dictionary | Delete an element 0 from a dictionary `a` | {i: a[i] for i in a if (i != 0)} |
5,844,672 | Delete an element from a dictionary | Delete an element "hello" from a dictionary `lol` | lol.pop('hello') |
5,844,672 | Delete an element from a dictionary | Delete an element with key `key` dictionary `r` | del r[key] |
41,648,246 | Efficient computation of the least-squares algorithm in NumPy | solve for the least squares' solution of matrices `a` and `b` | np.linalg.solve(np.dot(a.T, a), np.dot(a.T, b)) |
38,231,591 | Splitting dictionary/list inside a Pandas Column into Separate Columns | split dictionary/list inside a pandas column 'b' into separate columns in dataframe `df` | pd.concat([df.drop('b', axis=1), pd.DataFrame(df['b'].tolist())], axis=1) |
2,990,121 | loop through a Python list by twos | loop through 0 to 10 with step 2 | for i in range(0, 10, 2):
pass |
2,990,121 | loop through a Python list by twos | loop through `mylist` with step 2 | for i in mylist[::2]:
pass |
42,353,686 | How to use map to lowercase strings in a dictionary? | lowercase string values with key 'content' in a list of dictionaries `messages` | [{'content': x['content'].lower()} for x in messages] |
12,309,976 | convert list into string with spaces in python | convert a list `my_list` into string with values separated by spaces | """ """.join(my_list) |
4,695,143 | Regex. Match words that contain special characters or 'http://' | replace each occurrence of the pattern '(http://\\S+|\\S*[^\\w\\s]\\S*)' within `a` with '' | re.sub('(http://\\S+|\\S*[^\\w\\s]\\S*)', '', a) |
17,331,290 | How to check for palindrome using Python logic | check if string `str` is palindrome | str(n) == str(n)[::-1] |
2,911,754 | How to upload binary file with ftplib in Python? | upload binary file `myfile.txt` with ftplib | ftp.storbinary('STOR myfile.txt', open('myfile.txt', 'rb')) |
30,945,784 | How to remove all characters before a specific character in Python? | remove all characters from string `stri` upto character 'I' | re.sub('.*I', 'I', stri) |
2,953,746 | Python parse comma-separated number into int | parse a comma-separated string number '1,000,000' into int | int('1,000,000'.replace(',', '')) |
28,773,683 | Combine two Pandas dataframes with the same index | combine dataframe `df1` and dataframe `df2` by index number | pd.merge(df1, df2, left_index=True, right_index=True, how='outer') |
28,773,683 | Combine two Pandas dataframes with the same index | null | pandas.concat([df1, df2], axis=1) |
2,806,611 | What's the best way to aggregate the boolean values of a Python dictionary? | check if all boolean values in a python dictionary `dict` are true | all(dict.values()) |
40,273,313 | How to extract first two characters from string using regex | use regex pattern '^12(?=.{4}$)' to remove digit 12 if followed by 4 other digits in column `c_contofficeID` of dataframe `df` | df.c_contofficeID.str.replace('^12(?=.{4}$)', '') |
3,940,128 | reverse a list | reverse a list `L` | L[::(-1)] |
3,940,128 | reverse a list | reverse a list `array` | reversed(array) |
3,940,128 | reverse a list | reverse a list `L` | L.reverse() |
3,940,128 | reverse a list | reverse a list `array` | list(reversed(array)) |
31,302,904 | How to index nested lists in Python? | get first element of each tuple in list `A` | [tup[0] for tup in A] |
10,562,778 | Replacing characters in a file | replace character 'a' with character 'e' and character 's' with character '3' in file `contents` | newcontents = contents.replace('a', 'e').replace('s', '3') |
5,022,066 | How to serialize SqlAlchemy result to JSON? | serialise SqlAlchemy RowProxy object `row` to a json object | json.dumps([dict(list(row.items())) for row in rs]) |
3,227,624 | Cross-platform addressing of the config file | get file '~/foo.ini' | config_file = os.path.expanduser('~/foo.ini') |
14,734,750 | How to get multiple parameters with same name from a URL in Pylons? | get multiple parameters with same name from a url in pylons | request.params.getall('c') |
18,432,823 | how to create similarity matrix in numpy python? | Convert array `x` into a correlation matrix | np.corrcoef(x) |
3,090,175 | Python - Find the greatest number in a set of numbers | Find the greatest number in set `(1, 2, 3)` | print(max(1, 2, 3)) |
1,391,026 | Google App Engine - Request class query_string | Retrieve parameter 'var_name' from a GET request. | self.request.get('var_name') |
21,188,504 | python pandas: apply a function with arguments to a series. Update | Add 100 to each element of column "x" in dataframe `a` | a['x'].apply(lambda x, y: x + y, args=(100,)) |
40,079,728 | Get models ordered by an attribute that belongs to its OneToOne model | Django get first 10 records of model `User` ordered by criteria 'age' of model 'pet' | User.objects.order_by('-pet__age')[:10] |
510,348 | make a time delay | delay for "5" seconds | time.sleep(5) |
510,348 | make a time delay | make a 60 seconds time delay | time.sleep(60) |
510,348 | make a time delay | make a 0.1 seconds time delay | sleep(0.1) |
510,348 | make a time delay | make a 60 seconds time delay | time.sleep(60) |
510,348 | make a time delay | make a 0.1 seconds time delay | time.sleep(0.1) |
16,084,642 | Remove strings from a list that contains numbers in python | From a list of strings `my_list`, remove the values that contains numbers. | [x for x in my_list if not any(c.isdigit() for c in x)] |
20,970,279 | how to do a left,right and mid of a string in a pandas dataframe | get the middle two characters of a string 'state' in a pandas dataframe `df` | df['state'].apply(lambda x: x[len(x) / 2 - 1:len(x) / 2 + 1]) |
8,209,568 | How do I draw a grid onto a plot in Python? | draw a grid line on every tick of plot `plt` | plt.grid(True) |