python get rid of character in string code example

Example 1: take off character in python string

s = 'abc12321cba'

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

Example 2: python remove string from string

s = 'ab12abc34ba'
print(s.replace('ab', ''))

Example 3: delete certain characters from a string python

for char in line:
    if char in " ?.!/;:":
        line.replace(char,'')