how to remove a certain part of a string python code example

Example 1: take off character in python string

s = 'abc12321cba'

print(s.replace('a', ''))

Example 2: remove a part of a string python

url = 'abcdc.com'
print(url.replace('.com',''))

Example 3: remove a part of a string python

import re
url = 'abcdc.com'
url = re.sub('\.com$', '', url)