shell pip install pycli python import pycli python import pycli @pycli.command('greet') def greet_user(args): print(f"Hello, {args.name}!") if __name__ == '__main__': pycli.run() shell python your_script.py greet --name John python import pycli @pycli.command('greet') def greet_user(args): print(f"Hello, {args.name}!") @pycli.command('farewell') def say_goodbye(args): print(f"Goodbye, {args.name}!") if __name__ == '__main__': pycli.run() python import pycli @pycli.command('greet') def greet_user(args): name = args.name if args.upper: name = name.upper() print(f"Hello, {name}!") if __name__ == '__main__': pycli.run() shell python your_script.py greet --name John --upper