Use string python_

= hw 'the Hello World \ tk ...' 
HW2 = 'the Hello World \ t {k} ... {look}' 
# capitalized 
Print (hw.capitalize ()) 
    #hello world k ... 
# character statistics the number of strings in the 
Print (hw.count ( 'O')) 
    # 2 
# 50 characters printed, not on both sides with - filling 
Print (hw.center (50, '-')) 
    # -------- k ...----------------- the Hello World --------- 
# converted to binary 
Print (hw.encode ()) 
    # b'Hello World \ ... tk ' 
# determine what string to the end 
Print (hw.endswith ('. ')) 
    # is No True False 
# the \ t converted to the number of spaces 
Print (hw.expandtabs (TabSize = 20)) 
    #hello K ... world 
# search string position 
Print (hw.find ( 'world')) 
    #. 6 
Print (HW [. 6:]) 
    #World K ... 
# alternative format change and
Print (hw2.format (= K 'Ken', = look 'pppp')) 
    #hello World Ken ... pppp 
# dictionary usage 
print (hw2.format_map ({ 'k' : 'ken', 'look' : 'pppp'})) 
    #hello World Ken ... pppp 
# Find character position 
Print (hw.index ( 'O')) 
    #. 4 
# determines whether or not the character string or digital 
print ( 'ASrdw ... 10993'.isalnum ()) 
    #False 
Print ( 'ASrdw10993'.isalnum ()) 
    #True 
# determines whether the English character string 
Print (' Adfooi'.isalpha ()) 
    #True 
Print ( 'Adfooi002'.isalpha ( )) 
    #False 
# determines whether a decimal string 
print ( '55121'.isdecimal ()) 
    #True 
print (' 5A'.isdecimal ()) 
    #False 
# determines whether the character string is an integer of 
print ( '1558'.isdigit ()) # often used 
    #True
Print ( '1.1558'.isdigit ()) 
    #False 
# determines whether the string is valid identifier 
Print (' auia'.isidentifier ()) 
    #True 
Print ( '2auia'.isidentifier ()) 
    #False 
# determines that the string is a lowercase 
Print ( 'aadc'.islower ()) 
    #True 
Print (' aAdc'.islower ()) 
    # False 
# determines whether the string is a digital 
print ( '3A'.isnumeric ()) #str type of digital 
    # fale 
Print ( '300234'.isnumeric ()) 
    #True 
# determines whether or not a space character string 
Print (' 3A'.isspace ()) 
    #False 
Print ( '' .isspace ()) 
    #True 
# determines each header string It is an uppercase letter 
Print ( 'the Hello World'.istitle ()) 
    #True 
Print (' the Hello World '.istitle())
    #False
# Determines whether the print string, general tty file, drive file can not be printed 
Print ( 'the Hello world'.isprintable ()) 
# determining whether a string to uppercase 
Print (' the Hello world'.isupper ()) 
    #False 
Print ( ' WORLD'.isupper HELLO ()) 
# transferred out of the list of strings, and can customize the blocking character 
print ( '=='. join ( [ 'a', 'b', 'c'])) # often to 
    # == A == B C 
Print ( ''. the Join ([ 'A', 'B', 'C'])) 
    #abc 
# Right filled 
print ( 'HELLO WORLD'.ljust (50, ' ~ ')) 
    #hello WORLD ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 
# left padded 
print ( 'HELLO WORLD'.rjust (50,' ~ ')) 
    # ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ HELLO WORLD ~~~~~~ 
# uppercase to lowercase 
print ( 'HELLO WORLD'.Lower ()) 
    #hello World 
# lowercase capitalized 
Print ( 'Hello world'.upper ()) 
    #hello WORLD
# Default used to remove the beginning character, blank character (including \ n, \ r, \ t , '', namely: line feed, carriage returns, tabs, spaces) 
Print ( '\ tHello world'.lstrip ()) # often used 
    #hello World 
Print ( 'Hello world'.lstrip (' H ')) 
    #ello World 
# end to remove the default character, blank character (including \ n, \ r, \ t ,' ', namely: line feed , carriage returns, tabs, spaces) 
Print ( 'Hello World \ t'.rstrip ()) # frequently used 
    #hello World 
# character is used to remove the head and tail, the blank character (including \ n, \ r, \ t , '', namely: line feed, carriage returns, tabs, spaces) 
Print ( '\ tthllo World \ t'.strip ()) # frequently used 
    #hello World 
# character conversion, conversion of the characters of the 
list str.maketrans = ( 'abcdef', '123456') 
Print ( 'Hello world'.translate (List)) 
    # h5llo worl4 
# replacement string content 
print (' hello world'.replace ( 'l ', 'L')) # Frequently used 
    #hello WORLD 
Print ( 'Hello world'.replace (' L ',' L ',. 1)) 
    #hello World
# Find the right value 
Print ( 'Hello world'.rfind (' L ')) 
    #. 9 
# string into a list, by default to distinguish spaces 
Print (' Hello world'.split ()) 
    # [ 'Hello ',' World '] 
Print ('. 3. 1 + 2 + + + 5'.split. 4 ( '+')) 
    # [ '. 1', '2', '. 3', '. 4', '. 5'] 
# string into a list, to distinguish the transport default 
Print ( '. 1 \ N2 \ N3 \ N4 \ n5'.splitlines ()) 
    # ['. 1 ',' 2 ','. 3 ','. 4 ',' 5 '] 
# uppercase to lowercase, uppercase becomes lowercase 
Print (' the Hello World'.swapcase ()) 
    #hello WORLD 
# first character of each variable capital 
Print ( 'the Hello world'.title ()) 
    #hello World 
# 
Print (' world'.zfill the Hello (50)) 
    # 000000000000000000000000000000000000000hello world