python string remove whitespace

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)

1>>> import re
2>>> re.sub(' +', ' ', 'The     quick brown    fox')
3'The quick brown fox'

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

1a = "      yo!      "
2b = a.strip() # this will remove the white spaces that are leading and trailing

1' sss d ssd s'.replace(" ", "")
2# output: 'sssdssds'