#!/usr/bin/python3
"""Demonstrate parenthesis drops in argparse metavar."""
import argparse

# The very first and last parentheses disappear in the usage line, but are
# present in the argument list.
parser = argparse.ArgumentParser(
    description='Demonstrate parenthesis drops in argument meta-descriptions')
parser.add_argument(
    'positional',
    help='positional argument',
    metavar='(example) positional')
parser.add_argument(
    '-p',
    '--optional',
    help='optional argument',
    type=int,
    choices=[1, 2],
    metavar='{1 (option A), 2 (option B)}',
    default=1)
arguments = parser.parse_args()

print(arguments)

usage: parens.py [-h] [-p {1 option A), 2 (option B)}] (example positional

Demonstrate parenthesis drops in argument meta-descriptions

positional arguments:
  (example) positional  positional argument

optional arguments:
  -h, --help            show this help message and exit
  -p {1 (option A), 2 (option B)}, --optional {1 (option A), 2 (option B)}
                        optional argument