click_option_group_basic_example_with_mutually_exclusive_options.py

1import click
2from click_option_group import optgroup, RequiredMutuallyExclusiveOptionGroup
3
4@click.command()
5@optgroup.group('Server configuration', help='The configuration for the server endpoint')
6@optgroup.option('--host', default='localhost', help='The host address')
7@optgroup.option('--port', default=8080, help='The port number')
8@optgroup.group('Output selection', cls=RequiredMutuallyExclusiveOptionGroup, help='The output format')
9@optgroup.option('--json', is_flag=True, help='Output in JSON format')
10@optgroup.option('--csv', is_flag=True, help='Output in CSV format')
11def cli(host, port, json, csv):
12    """A simple CLI with option groups."""
13    click.echo(f"Host: {host}, Port: {port}")
14    if json:
15        click.echo("Format: JSON")
16    elif csv:
17        click.echo("Format: CSV")
18
19if __name__ == '__main__':
20    cli()