python strip() function introduction

Function prototype

Declaration: s is a string, rm is the character sequence to be deleted

s.strip(rm) Delete the beginning and end of the s string, located in rm delete The characters of the sequence

s.lstrip(rm) Delete the beginning of the s string, located at rm Delete the characters of the sequence

s.rstrip(rm) Delete the end of the s string, located at rm rm deletes characters in the sequence

Note:

1. When rm is empty, whitespace characters (including '\n', '\r', '\t', ' ' are deleted by default )

For example:

>>> a = '     123'
>>> a.strip()
'123'
>>> a='\t\tabc'
'abc'
>>> a = 'sdff\r\n'
>>> a.strip()
'sdff'

2. The rm deletion sequence here is to delete the characters on the edge (beginning or end) as long as they are within the deletion sequence.

For example:

>>> a = '123abc'
>>> a.strip('21')
'3abc'   结果是一样的
>>> a.strip('12')
'3abc'

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