import logging

from simple_parsing import ArgumentParser, Serializable


@dataclass
class DoA(Serializable):
    a_config: str = "taco"
    """
    what does a want?
    """

    def execute(self):
        print(f'A says {self.a_config}')


@dataclass
class DoB(Serializable):
    b_config: str = "pie"
    """
    what does b want?
    """

    def execute(self):
        print(f'B says {self.b_config}')


@dataclass
class Subprogram(Serializable):

    command: DoA | DoB
    """
    Do A or B?
    """

    def execute(self):
        self.command.execute()

if __name__ == "__main__":

    parser = ArgumentParser(add_config_path_arg=True)

    parser.add_arguments(Subprogram, dest="sub")

    # logging.basicConfig(level=logging.DEBUG, 
    #                     format="%(filename)s:%(lineno)s:%(name)s:%(message)s")
    args = parser.parse_args()

    sub: Subprogram = args.sub

    with open('./mwe_config_out.json', 'w') as ofile:
        sub.dump_json(ofile)

    sub.execute()

python sp_mwe.py doa --config_path mwe_config.json

    "sub": {
        "command": {
            "doa": {
                "a_config": "taco cheese"
            },
            "dob": {
                "b_config": "apple pie"
            }
        }
    }
}

    "sub": {
        "command": {
                "a_config": "taco cheese",
                "b_config": "apple pie"
            }
        }
    }

A says taco cheese

A says taco