How can I remove a trailing newline?

Question

What is the Python equivalent of Perl\'s chomp function, which removes the last character of a string if it is a newline?

Answer 1

>>> '   spacious   '.rstrip()
'   spacious'
>>> "AABAA".rstrip("A")
  'AAB'
>>> "ABBA".rstrip("AB") # both AB and BA are stripped
   ''
>>> "ABCABBA".rstrip("AB")
   'ABC'