Python3

.split() - separates a string into multiple strings, arranges them in a list, and returns the list according a defined separator

note! default separator is any whitespace

Example

string = 'Gm01:1234..5678:Gm01g12345'

string.split(':')[1].split('..')[0] = '1234'

 

.strip() - removes all the leading and trailing spaces from a string

 

.replace('a' , 'b') - replaces all the 'a' into 'b' in a string

 

 

 

 

.append(element) - adds a single element to the end of the existing list

 

.insert(idx,element) - adds  a single element to the defined index of the exisintg list

 

.remove(element) - removes the first defined element from a list

 

.pop(idx) - removes and returns the last element from the list or the defined index element

 

'str'.join(list) - takes all the elements from the list and joins them into a single string using 'str'

 

list() - a constructor returns a list

 

 

.keys() - takes all keys from the dictionary and returns elements as a list 

.values() - takes all values from the dictionary and returns elements as a list

 

 

open() - is used to open a file in specified mode and returns the file object

Usage

→open('file_name', 'r')._____

→open('file_name', 'w')._____

._____

.read() - takes a text file as input and returns the whole file object into a string

.readlines() - takes a text file as input and stores each line in the file as a separate element in a list

 

 

 

 

 

 

 

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note! lines = line + 1

          lines + = 1

→do the same thing