#!/usr/bin/env python3
"""things.py - description here."""

import argparse


def parse_args(argv: list[str] | None = None) -> argparse.Namespace:
    parser = argparse.ArgumentParser(description="things.py - description here.")
    parser.add_argument(
        "input",
        nargs="?",
        help="input file or value to process",
    )
    parser.add_argument(
        "-o",
        "--output",
        help="output file (defaults to stdout)",
    )
    parser.add_argument(
        "-v",
        "--verbose",
        action="store_true",
        help="enable verbose output",
    )
    return parser.parse_args(argv)


def main() -> None:
    args = parse_args()
    if args.verbose:
        print(f"input={args.input!r} output={args.output!r}")


if __name__ == "__main__":
    main()