strip doesn't remove all spaces python code example

Example 1: remove all whitespace from string python

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

Example 2: python 3 replace all whitespace characters

>>> s = " \t foo \n bar "
>>> "".join(s.split())
'foobar'