strip whitespace python

1s = '  Hello   World     From  Pankaj  \t\n\r\t  Hi       There        '
2
3>>> s.replace(" ", "")
4'HelloWorldFromPankaj\t\n\r\tHiThere'

1sentence = ' hello  apple'
2sentence.strip()
3>>> 'hello  apple'

1import re
2s = '\n \t this is a string   with a lot of whitespace\t'
3s = re.sub('\s+', '', s)

1st = " a "
2strip(st)
3#Output : "a"

1'     hello world!    '.strip()
2'hello world!'
3
4
5'     hello world!    '.lstrip()
6'hello world!    '
7
8'     hello world!    '.rstrip()
9'    hello world!'

1>>> s.strip()
2'Hello  World   From Pankaj \t\n\r\tHi There'
3