python: rstrip one exact string, respecting order

Question

Is it possible to use the python command rstrip so that it does only remove one exact string and does not take all letters separately?

I was confused w

Answer 1

Define a helper function:

def strip_suffix(s, suf):
    if s.endswith(suf):
        return s[:len(s)-len(suf)]
    return s

or use regex:

import re
suffix = ".txt"
s = re.sub(re.escape(suffix) + '$', '', s)