How to use the textfsm.parser.TextFSMError function in textfsm

if ref_table != result:
      print('Data mis-match!')
      return 1
    else:
      print('Data match!')


if __name__ == '__main__':
  help_msg = '%s [--help] template [input_file [output_file]]\n' % sys.argv[0]
  try:
    sys.exit(main())
  except Usage as err:
    print(err, file=sys.stderr)
    print('For help use --help', file=sys.stderr)
    sys.exit(2)
  except (IOError, TextFSMError, TextFSMTemplateError) as err:
    print(err, file=sys.stderr)
    sys.exit(2)

# First process the Record operators.
    if rule.record_op == 'Record':
      self._AppendRecord()

    elif rule.record_op == 'Clear':
      # Clear record.
      self._ClearRecord()

    elif rule.record_op == 'Clearall':
      # Clear all record entries.
      self._ClearAllRecord()

    # Lastly process line operators.
    if rule.line_op == 'Error':
      if rule.new_state:
        raise TextFSMError('Error: %s. Rule Line: %s. Input Line: %s.'
                           % (rule.new_state, rule.line_num, line))

      raise TextFSMError('State Error raised. Rule Line: %s. Input Line: %s'
                         % (rule.line_num, line))

    elif rule.line_op == 'Continue':
      # Continue with current line without returning to the start of the state.
      return False

    # Back to start of current state with a new line.
    return True