code: def to_positive_multiple_of_10(string):
      
      try:
          value = int(string)
      except ValueError:
          msg = '"%r" is not a positive multiple of 10 (greater zero).' % string
          raise argparse.ArgumentTypeError(msg)
      if value <= 0 or value % 10 != 0:
          msg = '"%r" is not a positive multiple of 10 (greater zero).' % string
          raise argparse.ArgumentTypeError(msg)
      return value
docs: Converts a string into its encoded positive integer (greater zero) or throws an exception.