Detailed usage of strip (), lstrip (), and rstrip () in Python, and lstriprstrip

Detailed usage of strip (), lstrip (), and rstrip () in Python, and lstriprstrip

Python has three functions to remove leading and trailing characters and spaces. They are:
Strip: used to remove leading and trailing characters and blank spaces (including \ n, \ r, \ t, '', that is, line breaks, carriage returns, tabs, and spaces)
Lstrip: used to remove the starting character and blank space (including \ n, \ r, \ t, '', that is, line feed, carriage return, tab, space)
Rstrip: Used to Remove trailing characters and blank spaces (including \ n, \ r, \ t, '', that is, line breaks, carriage returns, tabs, and spaces)

Note: These functions only Delete the first and last characters, but not the middle.

Usage:
String. strip ([chars])
String. lstrip ([chars])
String. rstrip ([chars])

The chars parameter is optional. If chars is empty, the blank spaces (including \ n, \ r, \ t, and '') at the beginning and end of the string are deleted by default ,'')
When chars is not empty, the function is interpreted as a character by chars, and the characters are removed.

It returns a string copy of the first and end characters (or blank characters), and the string itself will not change.

Example:
1. When chars is empty, blank spaces (including '\ n',' \ R', '\ t', '') are deleted by default ','')

>>> Str = 'AB Cd' >>> str. strip () # Remove leading and trailing spaces 'AB Cd'> str. lstrip () # Delete the leading space 'AB Cd'> str. rstrip () # Delete the Ending Space 'AB Cd'

2. When chars is not empty, the function is parsed into characters by chars, and the characters are removed.

>>> Str2 = '1a2b12c21 '>>> str2.strip ('12') # Delete the first and second 'a2b12c' >>> str2.lstrip ('12 ') # Delete the first 1 and 2 'a2b12c21 '>>> str2.rstrip ('12') # delete the end 1 and 2 '1a2b12c'