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2,200 | find the magnitude (length) squared of a vector `vf` field
| np . einsum ( '...j,...j->...' , vf , vf )
|
2,201 | request http url `url`
| r = requests . get ( url )
|
2,202 | request http url `url` with parameters `payload`
| r = requests . get ( url , params = payload )
|
2,203 | post request url `url` with parameters `payload`
| r = requests . post ( url , data = payload )
|
2,204 | make an HTTP post request with data `post_data`
| post_response = requests . post ( url = 'http://httpbin.org/post' , json = post_data )
|
2,205 | django jinja slice list `mylist` by '3:8'
| { { ( mylist | slice ) : '3:8' } }
|
2,206 | create dataframe `df` with content of hdf store file '/home/.../data.h5' with key of 'firstSet'
| df1 = pd . read_hdf ( '/home/.../data.h5' , 'firstSet' )
|
2,207 | get the largest index of the last occurrence of characters '([{' in string `test_string`
| max ( test_string . rfind ( i ) for i in '([{' )
|
2,208 | print 'here is your checkmark: ' plus unicode character u'\u2713'
| print ( 'here is your checkmark: ' + '\u2713' )
|
2,209 | print unicode characters in a string `\u0420\u043e\u0441\u0441\u0438\u044f`
| print ( '\u0420\u043e\u0441\u0441\u0438\u044f' )
|
2,210 | pads string '5' on the left with 1 zero
| print ( '{0}' . format ( '5' . zfill ( 2 ) ) )
|
2,211 | Remove duplicates elements from list `sequences` and sort it in ascending order
| sorted ( set ( itertools . chain . from_iterable ( sequences ) ) )
|
2,212 | pandas dataframe `df` column 'a' to list
| df [ 'a' ] . values . tolist ( )
|
2,213 | Get a list of all values in column `a` in pandas data frame `df`
| df [ 'a' ] . tolist ( )
|
2,214 | escaping quotes in string
| replace ( '"' , '\\"' )
|
2,215 | check if all string elements in list `words` are upper-cased
| print ( all ( word [ 0 ] . isupper ( ) for word in words ) )
|
2,216 | remove items from dictionary `myDict` if the item's value `val` is equal to 42
| myDict = { key : val for key , val in list ( myDict . items ( ) ) if val != 42 }
|
2,217 | Remove all items from a dictionary `myDict` whose values are `42`
| { key : val for key , val in list ( myDict . items ( ) ) if val != 42 }
|
2,218 | Determine the byte length of a utf-8 encoded string `s`
| return len ( s . encode ( 'utf-8' ) )
|
2,219 | kill a process with id `process.pid`
| os . kill ( process . pid , signal . SIGKILL )
|
2,220 | get data of columns with Null values in dataframe `df`
| df [ pd . isnull ( df ) . any ( axis = 1 ) ]
|
2,221 | strip everything up to and including the character `&` from url `url`, strip the character `=` from the remaining string and concatenate `.html` to the end
| url . split ( '&' ) [ - 1 ] . replace ( '=' , '' ) + '.html'
|
2,222 | Parse a file `sample.xml` using expat parsing in python 3
| parser . ParseFile ( open ( 'sample.xml' , 'rb' ) )
|
2,223 | Exit script
| sys . exit ( )
|
2,224 | assign value in `group` dynamically to class property `attr`
| setattr ( self , attr , group )
|
2,225 | decode url-encoded string `some_string` to its character equivalents
| urllib . parse . unquote ( urllib . parse . unquote ( some_string ) )
|
2,226 | decode a double URL encoded string
'FireShot3%2B%25282%2529.png' to
'FireShot3+(2).png'
| urllib . parse . unquote ( urllib . parse . unquote ( 'FireShot3%2B%25282%2529.png' ) )
|
2,227 | change flask security register url to `/create_account`
| app . config [ 'SECURITY_REGISTER_URL' ] = '/create_account'
|
2,228 | open a file `/home/user/test/wsservice/data.pkl` in binary write mode
| output = open ( '/home/user/test/wsservice/data.pkl' , 'wb' )
|
2,229 | remove the last element in list `a`
| del a [ ( - 1 ) ]
|
2,230 | remove the element in list `a` with index 1
| a . pop ( 1 )
|
2,231 | remove the last element in list `a`
| a . pop ( )
|
2,232 | remove the element in list `a` at index `index`
| a . pop ( index )
|
2,233 | remove the element in list `a` at index `index`
| del a [ index ]
|
2,234 | print a celsius symbol on x axis of a plot `ax`
| ax . set_xlabel ( 'Temperature (\u2103)' )
|
2,235 | Print a celsius symbol with matplotlib
| ax . set_xlabel ( 'Temperature ($^\\circ$C)' )
|
2,236 | convert a list of lists `list_of_lists` into a list of strings keeping empty sub-lists as empty string ''
| [ '' . join ( l ) for l in list_of_lists ]
|
2,237 | get a list of all the duplicate items in dataframe `df` using pandas
| pd . concat ( g for _ , g in df . groupby ( 'ID' ) if len ( g ) > 1 )
|
2,238 | Delete third row in a numpy array `x`
| x = numpy . delete ( x , 2 , axis = 1 )
|
2,239 | delete first row of array `x`
| x = numpy . delete ( x , 0 , axis = 0 )
|
2,240 | merge rows from dataframe `df1` with rows from dataframe `df2` and calculate the mean for rows that have the same value of axis 1
| pd . concat ( ( df1 , df2 ) , axis = 1 ) . mean ( axis = 1 )
|
2,241 | Get the average values from two numpy arrays `old_set` and `new_set`
| np . mean ( np . array ( [ old_set , new_set ] ) , axis = 0 )
|
2,242 | Matplotlib change marker size to 500
| scatter ( x , y , s = 500 , color = 'green' , marker = 'h' )
|
2,243 | Create new list `result` by splitting each item in list `words`
| result = [ item for word in words for item in word . split ( ',' ) ]
|
2,244 | convert JSON string '2012-05-29T19:30:03.283Z' into a DateTime object using format '%Y-%m-%dT%H:%M:%S.%fZ'
| datetime . datetime . strptime ( '2012-05-29T19:30:03.283Z' , '%Y-%m-%dT%H:%M:%S.%fZ' )
|
2,245 | count `True` values associated with key 'one' in dictionary `tadas`
| sum ( item [ 'one' ] for item in list ( tadas . values ( ) ) )
|
2,246 | encode a pdf file `pdf_reference.pdf` with `base64` encoding
| a = open ( 'pdf_reference.pdf' , 'rb' ) . read ( ) . encode ( 'base64' )
|
2,247 | split string `a` using new-line character '\n' as separator
| a . rstrip ( ) . split ( '\n' )
|
2,248 | split a string `a` with new line character
| a . split ( '\n' ) [ : - 1 ]
|
2,249 | return http status code 204 from a django view
| return HttpResponse ( status = 204 )
|
2,250 | check if 7 is in `a`
| ( 7 in a )
|
2,251 | check if 'a' is in list `a`
| ( 'a' in a )
|
2,252 | sort list `results` by keys value 'year'
| sorted ( results , key = itemgetter ( 'year' ) )
|
2,253 | get current url in selenium webdriver `browser`
| print ( browser . current_url )
|
2,254 | split string `str` with delimiter '; ' or delimiter ', '
| re . split ( '; |, ' , str )
|
2,255 | un-escaping characters in a string with python
| """\\u003Cp\\u003E""" . decode ( 'unicode-escape' )
|
2,256 | convert date string `s` in format pattern '%d/%m/%Y' into a timestamp
| time . mktime ( datetime . datetime . strptime ( s , '%d/%m/%Y' ) . timetuple ( ) )
|
2,257 | convert string '01/12/2011' to an integer timestamp
| int ( datetime . datetime . strptime ( '01/12/2011' , '%d/%m/%Y' ) . strftime ( '%s' ) )
|
2,258 | get http header of the key 'your-header-name' in flask
| request . headers [ 'your-header-name' ]
|
2,259 | select records of dataframe `df` where the sum of column 'X' for each value in column 'User' is 0
| df . groupby ( 'User' ) [ 'X' ] . filter ( lambda x : x . sum ( ) == 0 )
|
2,260 | Get data of dataframe `df` where the sum of column 'X' grouped by column 'User' is equal to 0
| df . loc [ df . groupby ( 'User' ) [ 'X' ] . transform ( sum ) == 0 ]
|
2,261 | Get data from dataframe `df` where column 'X' is equal to 0
| df . groupby ( 'User' ) [ 'X' ] . transform ( sum ) == 0
|
2,262 | How do I find an element that contains specific text in Selenium Webdriver (Python)?
| driver . find_elements_by_xpath ( "//*[contains(text(), 'My Button')]" )
|
2,263 | convert pandas group by object to multi-indexed dataframe with indices 'Name' and 'Destination'
| df . set_index ( [ 'Name' , 'Destination' ] )
|
2,264 | coalesce non-word-characters in string `a`
| print ( re . sub ( '(\\W)\\1+' , '\\1' , a ) )
|
2,265 | open a file "$file" under Unix
| os . system ( 'start "$file"' )
|
2,266 | Convert a Unicode string `title` to a 'ascii' string
| unicodedata . normalize ( 'NFKD' , title ) . encode ( 'ascii' , 'ignore' )
|
2,267 | Convert a Unicode string `a` to a 'ascii' string
| a . encode ( 'ascii' , 'ignore' )
|
2,268 | create a list `files` containing all files in directory '.' that starts with numbers between 0 and 9 and ends with the extension '.jpg'
| files = [ f for f in os . listdir ( '.' ) if re . match ( '[0-9]+.*\\.jpg' , f ) ]
|
2,269 | adding a 1-d array `[1, 2, 3, 4, 5, 6, 7, 8, 9]` to a 3-d array `np.zeros((6, 9, 20))`
| np . zeros ( ( 6 , 9 , 20 ) ) + np . array ( [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 ] ) [ ( None ) , : , ( None ) ]
|
2,270 | add array of shape `(6, 9, 20)` to array `[1, 2, 3, 4, 5, 6, 7, 8, 9]`
| np . zeros ( ( 6 , 9 , 20 ) ) + np . array ( [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 ] ) . reshape ( ( 1 , 9 , 1 ) )
|
2,271 | How can I launch an instance of an application using Python?
| os . system ( 'start excel.exe <path/to/file>' )
|
2,272 | get the list with the highest sum value in list `x`
| print ( max ( x , key = sum ) )
|
2,273 | sum the length of lists in list `x` that are more than 1 item in length
| sum ( len ( y ) for y in x if len ( y ) > 1 )
|
2,274 | Enclose numbers in quotes in a string `This is number 1 and this is number 22`
| re . sub ( '(\\d+)' , '"\\1"' , 'This is number 1 and this is number 22' )
|
2,275 | multiply the columns of sparse matrix `m` by array `a` then multiply the rows of the resulting matrix by array `a`
| numpy . dot ( numpy . dot ( a , m ) , a )
|
2,276 | Django check if an object with criteria `name` equal to 'name' and criteria `title` equal to 'title' exists in model `Entry`
| Entry . objects . filter ( name = 'name' , title = 'title' ) . exists ( )
|
2,277 | sort a nested list by the inverse of element 2, then by element 1
| sorted ( l , key = lambda x : ( - int ( x [ 1 ] ) , x [ 0 ] ) )
|
2,278 | get domain/host name from request object in Django
| request . META [ 'HTTP_HOST' ]
|
2,279 | get a string `randomkey123xyz987` between two substrings in a string `api('randomkey123xyz987', 'key', 'text')` using regex
| re . findall ( "api\\('(.*?)'" , "api('randomkey123xyz987', 'key', 'text')" )
|
2,280 | invoke perl script './uireplace.pl' using perl interpeter '/usr/bin/perl' and send argument `var` to it
| subprocess . call ( [ '/usr/bin/perl' , './uireplace.pl' , var ] )
|
2,281 | print list of items `myList`
| print ( '\n' . join ( str ( p ) for p in myList ) )
|
2,282 | update the dictionary `mydic` with dynamic keys `i` and values with key 'name' from dictionary `o`
| mydic . update ( { i : o [ 'name' ] } )
|
2,283 | split a `utf-8` encoded string `stru` into a list of characters
| list ( stru . decode ( 'utf-8' ) )
|
2,284 | convert utf-8 with bom string `s` to utf-8 with no bom `u`
| u = s . decode ( 'utf-8-sig' )
|
2,285 | Filter model 'Entry' where 'id' is not equal to 3 in Django
| Entry . objects . filter ( ~ Q ( id = 3 ) )
|
2,286 | lookup an attribute in any scope by name 'range'
| getattr ( __builtins__ , 'range' )
|
2,287 | restart a computer after `900` seconds using subprocess
| subprocess . call ( [ 'shutdown' , '/r' , '/t' , '900' ] )
|
2,288 | shutdown a computer using subprocess
| subprocess . call ( [ 'shutdown' , '/s' ] )
|
2,289 | abort a computer shutdown using subprocess
| subprocess . call ( [ 'shutdown' , '/a ' ] )
|
2,290 | logoff computer having windows operating system using python
| subprocess . call ( [ 'shutdown' , '/l ' ] )
|
2,291 | shutdown and restart a computer running windows from script
| subprocess . call ( [ 'shutdown' , '/r' ] )
|
2,292 | erase the contents of a file `filename`
| open ( 'filename' , 'w' ) . close ( )
|
2,293 | How to erase the file contents of text file in Python?
| open ( 'file.txt' , 'w' ) . close ( )
|
2,294 | convert dataframe `df` to list of dictionaries including the index values
| df . to_dict ( 'index' )
|
2,295 | Create list of dictionaries from pandas dataframe `df`
| df . to_dict ( 'records' )
|
2,296 | Group a pandas data frame by monthly frequenct `M` using groupby
| df . groupby ( pd . TimeGrouper ( freq = 'M' ) )
|
2,297 | divide the members of a list `conversions` by the corresponding members of another list `trials`
| [ ( c / t ) for c , t in zip ( conversions , trials ) ]
|
2,298 | sort dict `data` by value
| sorted ( data , key = data . get )
|
2,299 | Sort a dictionary `data` by its values
| sorted ( data . values ( ) )
|
Subsets and Splits