Python Learning Notes--string method

Center: Used to pad characters on both sides to center the string
' The middle is Sssssss '. Center (20)
' The middle is LX '

Strip: Delete beginning and end whitespace characters
' The middle is LX '. Strip ()
' The middle is LX '
names=[' lx ', ' dt ', ' xx '

>> name= ' LX '
>> if name in Names:print (' This is true ')
...
>> if Name.strip () in Names:print (' This is true ')
...
This is true

Find: Finds a substring in a string, returns the index of the first occurrence of a substring
' The middle is LX '. Find (' lx ')
14

Join: Merging string sequence elements
seq=[' 1 ', ' 2 ', ' 3 ', ' 4 ', ' 5 ']

>> sep.join (seq)
' 1+2+3+4+5 '

Split: Splitting a sequence of strings
Seq= ' 1+2+3+4+5+6 '

>> seq (). Split (' + ')
Traceback (most recent):
File "<stdin>", line 1, in <module>
TypeError: ' str ' object is not callable
>> seq.split (' + ')
[' 1 ', ' 2 ', ' 3 ', ' 4 ', ' 5 ', ' 6 ']
>> sep=seq.split (' + ')
>> Sep
[' 1 ', ' 2 ', ' 3 ', ' 4 ', ' 5 ', ' 6 ']

Lower: return string lowercase version

' TTT111 '. Lower ()
' ttt111 '

Replace: Replaces the specified string with another string. and returns the result after the substitution
This is a test '. Replace (' was ', ' is ')
' Thare is a test '

>> ' This was a test '. Replace (' is ', ' ere ')
' There ere a test '

Translate: Replacing a specific part of a string, only single-character substitution
To pre-set the conversion table, you can use Str.maketrans (' cs ', ' KZ ') This, Maketrans accept two parameters, two length of the same string, specifying the previous string is replaced by a string, you can set the third parameter is to delete the specified character, such as a space
Table=str.maketrans (' CS ', ' KZ ', ')

>> ' Ffccctttsss sssssss '. Translate (table)
' Ffkkktttzzz zzzzzzz '
>> ' Ffccctttsss sssssss '. Translate (table)
' Ffkkktttzzz zzzzzzz '
>> Table=str.maketrans (' cs ', ' KZ ', ')
>> ' Ffccctttsss sssssss '. Translate (table)
' Ffkkktttzzzzzzzzzz '

Python Learning Notes--string method