toys.py

#!/usr/bin/env python3
#####
import argparse
import sys


class MyToys:
    
    @classmethod
    def setup_args(cls, subparsers):
        pass

    def __init__(self, args):
        self.args = args

    def say(self):
        name = self.args.name if self.args.name else self.type
        print(f"The {name} says, \"{self.message}!\"")


class Kaiju(MyToys):
    type = "Kaiju"
    message = "Skreeeonk"

    @classmethod
    def setup_args(cls, subparsers):
        kaiju = subparsers.add_parser("kaiju", help="Kaiju toys")


class Tmnt(MyToys):
    type = "Ninja Turtles"

    @classmethod
    def setup_args(cls, subparsers):
        tmnt = subparsers.add_parser("tmnt", help="Ninja Turtles toys")
        tmnt.add_argument("--pizza-time", dest="pizza_time", action="store_true", default=False)

    def __init__(self, args):
        super().__init__(args)
        self.message = "Pizza time" if self.args.pizza_time else "Cowabunga"


class Help(MyToys):
    def say(self):
        print("Use --help to use this script")
        sys.exit(1)


def main():
    class_by_command = {
        "kaiju": Kaiju,
        "tmnt": Tmnt,
    }

    parser = argparse.ArgumentParser(description="Toy test")
    parser.add_argument("--name", dest="name")
    subparsers = parser.add_subparsers(dest="command")

    for c in class_by_command.values():
        print(c)
        c.setup_args(subparsers)

    args = parser.parse_args()

    toy_object = class_by_command.get(args.command, Help)(args)
    toy_object.say()


if  __name__ == "__main__":
    main()