Datasets:

neulab

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conala

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Numpy: Get random set of rows from 2D array

create a new 2D array with 2 random rows from array `A`

A[(np.random.choice(A.shape[0], 2, replace=False)), :]

Numpy: Get random set of rows from 2D array

create a new 2 dimensional array containing two random rows from array `A`

A[(np.random.randint(A.shape[0], size=2)), :]

Combining rows in pandas

combining rows in pandas by adding their values

df.groupby(df.index).sum()

Parsing XML with namespace in Python via 'ElementTree'

find all `owl:Class` tags by parsing xml with namespace

root.findall('{http://www.w3.org/2002/07/owl#}Class')

How do I generate a random string (of length X, a-z only) in Python?

generate a random string of length `x` containing lower cased ASCII letters

"""""".join(random.choice(string.lowercase) for x in range(X))

Python cant find module in the same folder

add a path `/path/to/2014_07_13_test` to system path

sys.path.append('/path/to/2014_07_13_test')

round number to nearest integer

round number `x` to nearest integer

int(round(x))

round number to nearest integer

round number `h` to nearest integer

h = int(round(h))

round number to nearest integer

round number 32.268907563 up to 3 decimal points

round(32.268907563, 3)

round number to nearest integer

round number `value` up to `significantDigit` decimal places

round(value, significantDigit)

round number to nearest integer

round number 1.0005 up to 3 decimal places

round(1.0005, 3)

round number to nearest integer

round number 2.0005 up to 3 decimal places

round(2.0005, 3)

round number to nearest integer

round number 3.0005 up to 3 decimal places

round(3.0005, 3)

round number to nearest integer

round number 4.0005 up to 3 decimal places

round(4.0005, 3)

round number to nearest integer

round number 8.005 up to 2 decimal places

round(8.005, 2)

round number to nearest integer

round number 7.005 up to 2 decimal places

round(7.005, 2)

round number to nearest integer

round number 6.005 up to 2 decimal places

round(6.005, 2)

round number to nearest integer

round number 1.005 up to 2 decimal places

round(1.005, 2)

Pandas - FillNa with another column

fill missing value in one column 'Cat1' with the value of another column 'Cat2'

df['Cat1'].fillna(df['Cat2'])

Python: Logging TypeError: not all arguments converted during string formatting

convert the argument `date` with string formatting in logging

logging.info('date=%s', date)

Python: Logging TypeError: not all arguments converted during string formatting

Log message of level 'info' with value of `date` in the message

logging.info('date={}'.format(date))

In dictionary, converting the value from string to integer

convert values in dictionary `d` into integers

{k: int(v) for k, v in d.items()}

How can I add the corresponding elements of several lists of numbers?

sum elements at the same index of each list in list `lists`

map(sum, zip(*lists))

Python: How to convert a string containing hex bytes to a hex string

Convert a string `s` containing hex bytes to a hex string

s.decode('hex')

Python: How to convert a string containing hex bytes to a hex string

convert a string `s` containing hex bytes to a hex string

binascii.a2b_hex(s)

MITM proxy over SSL hangs on wrap_socket with client

send data 'HTTP/1.0 200 OK\r\n\r\n' to socket `connection`

connection.send('HTTP/1.0 200 established\r\n\r\n')

MITM proxy over SSL hangs on wrap_socket with client

send data 'HTTP/1.0 200 OK\r\n\r\n' to socket `connection`

connection.send('HTTP/1.0 200 OK\r\n\r\n')

Set value for particular cell in pandas DataFrame

set the value of cell `['x']['C']` equal to 10 in dataframe `df`

df['x']['C'] = 10

Norm along row in pandas

normalize the dataframe `df` along the rows

np.sqrt(np.square(df).sum(axis=1))

How do I remove identical items from a list and sort it in Python?

remove identical items from list `my_list` and sort it alphabetically

sorted(set(my_list))

Python Finding Index of Maximum in List

find the index of the element with the maximum value from a list 'a'.

max(enumerate(a), key=lambda x: x[1])[0]

Python Accessing Values in A List of Dictionaries

create a list where each element is a value of the key 'Name' for each dictionary `d` in the list `thisismylist`

[d['Name'] for d in thisismylist]

Python Accessing Values in A List of Dictionaries

create a list of tuples with the values of keys 'Name' and 'Age' from each dictionary `d` in the list `thisismylist`

[(d['Name'], d['Age']) for d in thisismylist]

How to grab one random item from a database in Django/postgreSQL?

grab one random item from a database `model` in django/postgresql

model.objects.all().order_by('?')[0]

Run a python script from another python script, passing in args

run python script 'script2.py' from another python script, passing in 1 as an argument

os.system('script2.py 1')

Python Regex for hyphenated words

python regex for hyphenated words in `text`

re.findall('\\w+(?:-\\w+)+', text)

Create variable key/value pairs with argparse (python)

create variable key/value pairs with argparse

parser.add_argument('--conf', nargs=2, action='append')

How do you pick "x" number of unique numbers from a list in Python?

Get `3` unique items from a list

random.sample(list(range(1, 16)), 3)

Sort a list of strings based on regular expression match or something similar

sort list `strings` in alphabetical order based on the letter after percent character `%` in each element

strings.sort(key=lambda str: re.sub('.*%(.).*', '\\1', str))

Sort a list of strings based on regular expression match or something similar

sort a list of strings `strings` based on regex match

strings.sort(key=lambda str: re.sub('.*%', '', str))

Appending to 2D lists in Python

Create list `listy` containing 3 empty lists

listy = [[] for i in range(3)]

Sort NumPy float array column by column

sort numpy float array `A` column by column

A = np.array(sorted(A, key=tuple))

Python list comprehension for loops

Get a list from two strings `12345` and `ab` with values as each character concatenated

[(x + y) for x in '12345' for y in 'ab']

Trimming a string

trim string " Hello "

' Hello '.strip()

Trimming a string

trim string `myString `

myString.strip()

Trimming a string

Trimming a string " Hello "

' Hello '.strip()

Trimming a string

Trimming a string " Hello"

' Hello'.strip()

Trimming a string

Trimming a string "Bob has a cat"

'Bob has a cat'.strip()

Trimming a string

Trimming a string " Hello "

' Hello '.strip()

Trimming a string

Trimming a string `str`

str.strip()

Trimming a string

Trimming "\n" from string `myString`

myString.strip('\n')

Trimming a string

left trimming "\n\r" from string `myString`

myString.lstrip('\n\r')

Trimming a string

right trimming "\n\t" from string `myString`

myString.rstrip('\n\t')

Trimming a string

Trimming a string " Hello\n" by space

' Hello\n'.strip(' ')

Sort a list of tuples depending on two elements

sort a list of tuples 'unsorted' based on two elements, second and third

sorted(unsorted, key=lambda element: (element[1], element[2]))

Python, Encoding output to UTF-8

decode string `content` to UTF-8 code

print(content.decode('utf8'))

How do I vectorize this loop in numpy?

find the index of the maximum value in the array `arr` where the boolean condition in array `cond` is true

np.ma.array(np.tile(arr, 2).reshape(2, 3), mask=~cond).argmax(axis=1)

How to convert efficiently a dataframe column of string type into datetime in Python?

convert a dataframe `df`'s column `ID` into datetime, after removing the first and last 3 letters

pd.to_datetime(df.ID.str[1:-3])

How to gracefully fallback to `NaN` value while reading integers from a CSV with Pandas?

read CSV file 'my.csv' into a dataframe `df` with datatype of float for column 'my_column' considering character 'n/a' as NaN value

df = pd.read_csv('my.csv', dtype={'my_column': np.float64}, na_values=['n/a'])

How to gracefully fallback to `NaN` value while reading integers from a CSV with Pandas?

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'])

All combinations of a list of lists

create a list containing all cartesian products of elements in list `a`

list(itertools.product(*a))

How to extract all UPPER from a string? Python

remove uppercased characters in string `s`

re.sub('[^A-Z]', '', s)

Get date from ISO week number in Python

convert string '2011221' into a DateTime object using format '%Y%W%w'

datetime.strptime('2011221', '%Y%W%w')

How to read a "C source, ISO-8859 text"

read file 'myfile' using encoding 'iso-8859-1'

codecs.open('myfile', 'r', 'iso-8859-1').read()

List Comprehensions in Python : efficient selection in a list

create a list containing elements from list `list` that are predicate to function `f`

[f(x) for x in list]

Regex matching 5-digit substrings not enclosed with digits

regex matching 5-digit substrings not enclosed with digits in `s`

re.findall('(?<!\\d)\\d{5}(?!\\d)', s)

filtering elements from list of lists in Python?

create a list containing elements of list `a` if the sum of the element is greater than 10

[item for item in a if sum(item) > 10]

python: how to convert currency to decimal?

convert currency string `dollars` to decimal `cents_int`

cents_int = int(round(float(dollars.strip('$')) * 100))

Remove final characters from string recursively - What's the best way to do this?

remove letters from string `example_line` if the letter exist in list `bad_chars`

"""""".join(dropwhile(lambda x: x in bad_chars, example_line[::-1]))[::-1]

Creating an empty list

Creating an empty list `l`

l = []

Creating an empty list

Creating an empty list `l`

l = list()

Creating an empty list

Creating an empty list

list()

Creating an empty list

Creating an empty list

[]

How to properly quit a program in python

properly quit a program

sys.exit(0)

Add string in a certain position in Python

add string `-` in `4th` position of a string `s`

s[:4] + '-' + s[4:]

Python : how to append new elements in a list of list?

append 3 lists in one list

[[] for i in range(3)]

Python : how to append new elements in a list of list?

Initialize a list of empty lists `a` of size 3

a = [[] for i in range(3)]

Changing the referrer URL in python requests

request URL `url` using http header `{'referer': my_referer}`

requests.get(url, headers={'referer': my_referer})

Python, Matplotlib, subplot: How to set the axis range?

set the y axis range to `0, 1000` in subplot using pylab

pylab.ylim([0, 1000])

Pandas convert a column of list to dummies

convert a column of list in series `s` to dummies

pd.get_dummies(s.apply(pd.Series).stack()).sum(level=0)

Finding the largest delta between two integers in a list in python

max(abs(x - y) for x, y in zip(values[1:], values[:-1]))

How to convert hex string to integer in Python?

convert a hex string `x` to string

y = str(int(x, 16))

check if a string is a number (float)

check if string `a` is an integer

a.isdigit()

check if a string is a number

function to check if a string is a number

isdigit()

check if a string is a number

check if string `b` is a number

b.isdigit()

pandas.read_csv: how to skip comment lines

pandas read comma-separated CSV file `s` and skip commented lines starting with '#'

pd.read_csv(StringIO(s), sep=',', comment='#')

Pandas: how to change all the values of a column?

pandas: change all the values of a column 'Date' into "int(str(x)[-4:])"

df['Date'] = df['Date'].apply(lambda x: int(str(x)[-4:]))

sum a list of numbers in Python

sum a list of numbers `list_of_nums`

sum(list_of_nums)

how to get the index of dictionary with the highest value in a list of dictionary

Get an item from a list of dictionary `lst` which has maximum value in the key `score` using lambda function

max(lst, key=lambda x: x['score'])

Get data from the meta tags using BeautifulSoup

BeautifulSoup find all tags with attribute 'name' equal to 'description'

soup.findAll(attrs={'name': 'description'})

Python: how to get rid of spaces in str(dict)?

remove all spaces from a string converted from dictionary `{'a': 1, 'b': 'as df'}`

str({'a': 1, 'b': 'as df'}).replace(': ', ':').replace(', ', ',')

Python: how to get rid of spaces in str(dict)?

convert dictionary `dict` into a string formatted object

'{' + ','.join('{0!r}:{1!r}'.format(*x) for x in list(dct.items())) + '}'

Python- insert a character into a string

concatenate items from list `parts` into a string starting from the second element

"""""".join(parts[1:])

Python- insert a character into a string

insert a character ',' into a string in front of '+' character in second part of the string

""",+""".join(c.rsplit('+', 1))

How do I delete a row in a numpy array which contains a zero?

delete all rows in a numpy array `a` where any value in a row is zero `0`

a[np.all(a != 0, axis=1)]

Extracting only characters from a string in Python

extract only alphabetic characters from a string `your string`

""" """.join(re.split('[^a-zA-Z]*', 'your string'))

Extracting only characters from a string in Python

Extract only characters from a string as a list

re.split('[^a-zA-Z]*', 'your string')

Create Union of All Values Contained in Multiple Lists

get the union set from list of lists `results_list`

results_union = set().union(*results_list)

Create Union of All Values Contained in Multiple Lists

get the union of values in list of lists `result_list`

return list(set(itertools.chain(*result_list)))

python: check if an numpy array contains any element of another array

check if a numpy array `a1` contains any element of another array `a2`

np.any(np.in1d(a1, a2))