python import click @click.command() @click.argument('name') @click.option('--count', default=1, help='Number of greetings.') @click.option('--uppercase', is_flag=True, help='Convert to uppercase.') def greet(name, count, uppercase): """Simple program that greets NAME for a total of COUNT times.""" for _ in range(count): if uppercase: click.echo(f"Hello, {name.upper()}!") else: click.echo(f"Hello, {name}!") if __name__ == '__main__': greet() pip install click python greet.py --count 3 --uppercase Alice HELLO, ALICE! HELLO, ALICE! HELLO, ALICE!