Datasets:

neulab

/

conala

like 55

Using BeautifulSoup to search html for string

searche in HTML string for elements that have text 'Python'

soup.body.findAll(text='Python')

Using BeautifulSoup to search html for string

BeautifulSoup find string 'Python Jobs' in HTML body `body`

soup.body.findAll(text='Python Jobs')

Python: sorting items in a dictionary by a part of a key?

Sort items in dictionary `d` using the first part of the key after splitting the key

sorted(list(d.items()), key=lambda name_num: (name_num[0].rsplit(None, 1)[0], name_num[1]))

Find non-common elements in lists

create a set that is the exclusive or of [1, 2, 3] and [3, 4, 5]

set([1, 2, 3]) ^ set([3, 4, 5])

retrieving list items from request.POST in django/python

Get a list values of a dictionary item `pass_id` from post requests in django

request.POST.getlist('pass_id')

How do I remove dicts from a list with duplicate fields in python?

Filter duplicate entries w.r.t. value in 'id' from a list of dictionaries 'L'

list(dict((x['id'], x) for x in L).values())

Merge Columns within a DataFrame that have the Same Name

Get pandas GroupBy object with sum over the rows with same column names within dataframe `df`

df.groupby(df.columns, axis=1).sum()

python dict comprehension with two ranges

convert the zip of range `(1, 5)` and range `(7, 11)` into a dictionary

dict(zip(list(range(1, 5)), list(range(7, 11))))

How to turn a boolean array into index array in numpy

Get all indexes of boolean numpy array where boolean value `mask` is True

numpy.where(mask)

case insensitive string comparison

case insensitive comparison of strings `string1` and `string2`

if (string1.lower() == string2.lower()): print('The strings are the same (case insensitive)') else: print('The strings are not the same (case insensitive)')

case insensitive string comparison

case insensitive string comparison between `string1` and `string2`

if (string1.lower() == string2.lower()): pass

case insensitive string comparison

case insensitive string comparison between `string1` and `string2`

(string1.lower() == string2.lower())

case insensitive string comparison

case insensitive string comparison between `first` and `second`

(first.lower() == second.lower())

case insensitive string comparison

case insensitive comparison between strings `first` and `second`

(first.upper() == second.upper())

Taking the results of a bash command and using it in python

Taking the results of a bash command "awk '{print $10, $11}' test.txt > test2.txt"

os.system("awk '{print $10, $11}' test.txt > test2.txt")

How to remove multiple indexes from a list at the same time?

remove multiple values from a list `my_list` at the same time with index starting at `2` and ending just before `6`.

del my_list[2:6]

How to convert a string to its Base-10 representation?

convert a string `s` to its base-10 representation

int(s.encode('hex'), 16)

Python regular expression with codons

match regex pattern 'TAA(?:[ATGC]{3})+?TAA' on string `seq`

re.findall('TAA(?:[ATGC]{3})+?TAA', seq)

Sorting a set of values

sort a set `s` by numerical value

sorted(s, key=float)

convert an int to a hex string

convert an int 65 to hex string

hex(65)

Simple way to append a pandas series with same index

append a pandas series `b` to the series `a` and get a continuous index

a.append(b).reset_index(drop=True)

Simple way to append a pandas series with same index

simple way to append a pandas series `a` and `b` with same index

pd.concat([a, b], ignore_index=True)

In Python, is there a concise way to use a list comprehension with multiple iterators?

Get a list of tuples with multiple iterators using list comprehension

[(i, j) for i in range(1, 3) for j in range(1, 5)]

sorting values of python dict using sorted builtin function

reverse sort items in dictionary `mydict` by value

sorted(iter(mydict.items()), key=itemgetter(1), reverse=True)

How can I select 'last business day of the month' in Pandas?

select the last business day of the month for each month in 2014 in pandas

pd.date_range('1/1/2014', periods=12, freq='BM')

How do I disable the security certificate check in Python requests

disable the certificate check in https requests for url `https://kennethreitz.com`

requests.get('https://kennethreitz.com', verify=False)

dropping a row in pandas with dates indexes, python

return dataframe `df` with last row dropped

df.ix[:-1]

string contains substring

check if "blah" is in string `somestring`

if ('blah' not in somestring): pass

string contains substring

check if string `needle` is in `haystack`

if (needle in haystack): pass

string contains substring

check if string "substring" is in string

string.find('substring')

string contains substring method

check if string `s` contains "is"

if (s.find('is') == (-1)): print("No 'is' here!") else: print("Found 'is' in the string.")

Extract first and last row of a dataframe in pandas

extract first and last row of a dataframe `df`

pd.concat([df.head(1), df.tail(1)])

Django - Filter queryset by CharField value length

filter a Django model `MyModel` to have charfield length of max `255`

MyModel.objects.extra(where=['CHAR_LENGTH(text) > 254'])

Django - Filter queryset by CharField value length

Filter queryset for all objects in Django model `MyModel` where texts length are greater than `254`

MyModel.objects.filter(text__regex='^.{254}.*')

Best way to count the number of rows with missing values in a pandas DataFrame

count the number of rows with missing values in a pandas dataframe `df`

sum(df.apply(lambda x: sum(x.isnull().values), axis=1) > 0)

Sorting while preserving order in python

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

How to set the font size of a Canvas' text item?

set the font 'Purisa' of size 12 for a canvas' text item `k`

canvas.create_text(x, y, font=('Purisa', 12), text=k)

Python: How to use a list comprehension here?

create a list containing all values associated with key 'baz' in dictionaries of list `foos` using list comprehension

[y['baz'] for x in foos for y in x['bar']]

pandas read csv with extra commas in column

read pandas data frame csv `comma.csv` with extra commas in column specifying string delimiter `'`

df = pd.read_csv('comma.csv', quotechar="'")

avoiding regex in pandas str.replace

replace string 'in.' with ' in. ' in dataframe `df` column 'a'

df['a'] = df['a'].str.replace('in.', ' in. ')

Finding the index of elements based on a condition using python list comprehension

Get all indexes of a list `a` where each value is greater than `2`

[i for i in range(len(a)) if a[i] > 2]

check if a variable exists

check if a local variable `myVar` exists

('myVar' in locals())

check if a variable exists

check if a global variable `myVar` exists

('myVar' in globals())

check if a variable exists

check if object `obj` has attribute 'attr_name'

hasattr(obj, 'attr_name')

check if a variable exists

check if a local variable 'myVar' exists

if ('myVar' in locals()): pass

check if a variable exists

check if a global variable 'myVar' exists

if ('myVar' in globals()): pass

Python lambda function

lambda function that adds two operands

lambda x, y: x + y

What's the shortest way to count the number of items in a generator/iterator?

count the number of items in a generator/iterator `it`

sum(1 for i in it)

how to get tuples from lists using list comprehension in python

get tuples of the corresponding elements from lists `lst` and `lst2`

[(x, lst2[i]) for i, x in enumerate(lst)]

how to get tuples from lists using list comprehension in python

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 to get tuples from lists using list comprehension in python

get tuples from lists `lst` and `lst2` using list comprehension in python 2

[(lst[i], lst2[i]) for i in range(len(lst))]

How do I convert a hex triplet to an RGB tuple and back?

convert hex triplet string `rgbstr` to rgb tuple

struct.unpack('BBB', rgbstr.decode('hex'))

Check if something is not in a list

Check if 3 is not in a list [2, 3, 4]

(3 not in [2, 3, 4])

Check if something is not in a list

Check if tuple (2, 3) is not in a list [(2, 3), (5, 6), (9, 1)]

((2, 3) not in [(2, 3), (5, 6), (9, 1)])

Check if something is not in a list

Check if tuple (2, 3) is not in a list [(2, 7), (7, 3), "hi"]

((2, 3) not in [(2, 7), (7, 3), 'hi'])

Check if something is not in a list

Check if 3 is not in the list [4,5,6]

(3 not in [4, 5, 6])

Create new list by taking first item from first list, and last item from second list

create a list by appending components from list `a` and reversed list `b` interchangeably

[value for pair in zip(a, b[::-1]) for value in pair]

Remove one column for a numpy array

delete the last column of numpy array `a` and assign resulting array to `b`

b = np.delete(a, -1, 1)

Python mySQL Update, Working but not updating table

commit all the changes after executing a query.

dbb.commit()

How do I join two dataframes based on values in selected columns?

join two dataframes based on values in selected columns

pd.merge(a, b, on=['A', 'B'], how='outer')

How to change QPushButton text and background color

set text color as `red` and background color as `#A3C1DA` in qpushbutton

setStyleSheet('QPushButton {background-color: #A3C1DA; color: red;}')

Finding the average of a list

find the mean of elements in list `l`

sum(l) / float(len(l))

Python: Finding a (string) key in a dictionary that contains a substring

Find all the items from a dictionary `D` if the key contains the string `Light`

[(k, v) for k, v in D.items() if 'Light' in k]

How do I use a MD5 hash (or other binary data) as a key name?

Get a md5 hash from string `thecakeisalie`

k = hashlib.md5('thecakeisalie').hexdigest()

How to get only the last part of a path in Python?

os.path.basename(os.path.normpath('/folderA/folderB/folderC/folderD/'))

Sorting datetime objects while ignoring the year?

sort datetime objects `birthdays` by `month` and `day`

birthdays.sort(key=lambda d: (d.month, d.day))

How do I extract table data in pairs using BeautifulSoup?

extract table data from table `rows` using beautifulsoup

[[td.findNext(text=True) for td in tr.findAll('td')] for tr in rows]

python: rstrip one exact string, respecting order

strip the string `.txt` from anywhere in the string `Boat.txt.txt`

"""Boat.txt.txt""".replace('.txt', '')

Python Pandas: How to get the row names from index of a dataframe?

get a list of the row names from index of a pandas data frame

list(df.index)

Python Pandas: How to get the row names from index of a dataframe?

get the row names from index in a pandas data frame

df.index

List of all unique characters in a string?

create a list of all unique characters in string 'aaabcabccd'

"""""".join(list(OrderedDict.fromkeys('aaabcabccd').keys()))

List of all unique characters in a string?

get list of all unique characters in a string 'aaabcabccd'

list(set('aaabcabccd'))

List of all unique characters in a string?

"""""".join(set('aaabcabccd'))

Find rows with non zero values in a subset of columns in pandas dataframe

find rows with non zero values in a subset of columns where `df.dtypes` is not equal to `object` in pandas dataframe

df.loc[(df.loc[:, (df.dtypes != object)] != 0).any(1)]

upload file with Python Mechanize

br.form.add_file(open(filename), 'text/plain', filename)

Multiple 'in' operators in Python?

check if dictionary `d` contains all keys in list `['somekey', 'someotherkey', 'somekeyggg']`

all(word in d for word in ['somekey', 'someotherkey', 'somekeyggg'])

How to hide output of subprocess in Python 2.7

hide output of subprocess `['espeak', text]`

subprocess.check_output(['espeak', text], stderr=subprocess.STDOUT)

How to replace NaNs by preceding values in pandas DataFrame?

replace nans by preceding values in pandas dataframe `df`

df.fillna(method='ffill', inplace=True)

How to create range of numbers in Python like in MATLAB

create 4 numbers in range between 1 and 3

print(np.linspace(1, 3, num=4, endpoint=False))

How to create range of numbers in Python like in MATLAB

Create numpy array of `5` numbers starting from `1` with interval of `3`

print(np.linspace(1, 3, num=5))

Symlinks on windows?

create a symlink directory `D:\\testdirLink` for directory `D:\\testdir` with unicode support using ctypes library

kdll.CreateSymbolicLinkW('D:\\testdirLink', 'D:\\testdir', 1)

Python: slicing a multi-dimensional array

get a list `slice` of array slices of the first two rows and columns from array `arr`

slice = [arr[i][0:2] for i in range(0, 2)]

Upload files to Google cloud storage from appengine app

upload uploaded file from path '/upload' to Google cloud storage 'my_bucket' bucket

upload_url = blobstore.create_upload_url('/upload', gs_bucket_name='my_bucket')

Change directory to the directory of a Python script

change directory to the directory of a python script

os.chdir(os.path.dirname(__file__))

Call a function with argument list in python

call a function with argument list `args`

func(*args)

Pandas DataFrame, how do i split a column into two

split column 'AB' in dataframe `df` into two columns by first whitespace ' '

df['AB'].str.split(' ', 1, expand=True)

Pandas DataFrame, how do i split a column into two

pandas dataframe, how do i split a column 'AB' into two 'A' and 'B' on delimiter ' '

df['A'], df['B'] = df['AB'].str.split(' ', 1).str

Sorting Python list based on the length of the string

sort list `xs` based on the length of its elements

print(sorted(xs, key=len))

Sorting Python list based on the length of the string

sort list `xs` in ascending order of length of elements

xs.sort(lambda x, y: cmp(len(x), len(y)))

Sorting Python list based on the length of the string

sort list of strings `xs` by the length of string

xs.sort(key=lambda s: len(s))

how to plot arbitrary markers on a pandas data series?

plot point marker '.' on series `ts`

ts.plot(marker='.')

get all combination of n binary value

get all combination of n binary values

lst = list(itertools.product([0, 1], repeat=n))

get all combination of n binary value

get all combination of n binary values

lst = map(list, itertools.product([0, 1], repeat=n))

get all combination of n binary value

get all combination of 3 binary values

bin = [0, 1] [(x, y, z) for x in bin for y in bin for z in bin]

get all combination of n binary value

get all combination of 3 binary values

lst = list(itertools.product([0, 1], repeat=3))

Append string to the start of each value in a said column of a pandas dataframe (elegantly)

append string 'str' at the beginning of each value in column 'col' of dataframe `df`

df['col'] = 'str' + df['col'].astype(str)

How to get a variable name as a string in Python?

get a dict of variable names `['some', 'list', 'of', 'vars']` as a string and their values

dict((name, eval(name)) for name in ['some', 'list', 'of', 'vars'])

How to add a colorbar for a hist2d plot

add a colorbar to plot `plt` using image `im` on axes `ax`

plt.colorbar(im, ax=ax)

How to get every element in a list of list of lists?

convert nested list 'Cards' into a flat list

[a for c in Cards for b in c for a in b]

Sorting dictionary keys in python

create a list containing keys of dictionary `d` and sort it alphabetically

sorted(d, key=d.get)