code: def strip_suffix(string, suffix, regex=False):
      
      if not isinstance(string, six.string_types) or not isinstance(suffix, six.string_types):
          msg = 'Arguments to strip_suffix must be string types. Are: {s}, {p}'\
                .format(s=type(string), p=type(suffix))
          raise TypeError(msg)
  
      if not regex:
          suffix = re.escape(suffix)
      if not suffix.endswith('$'):
          suffix = '({s})$'.format(s=suffix)
      return _strip(string, suffix)
docs: Strip the suffix from the string.
  
      If 'regex' is specified, suffix is understood as a regular expression.