python-dependency-injector/examples/providers/factory_aggregate.py

"""`FactoryAggregate` provider example."""

import dataclasses
import sys

from dependency_injector import containers, providers


@dataclasses.dataclass
class Game:
    player1: str
    player2: str

    def play(self):
        print(
            f'{self.player1} and {self.player2} are '
            f'playing {self.__class__.__name__.lower()}'
        )


class Chess(Game):
    ...


class Checkers(Game):
    ...


class Ludo(Game):
    ...


class Container(containers.DeclarativeContainer):

    game_factory = providers.FactoryAggregate(
        chess=providers.Factory(Chess),
        checkers=providers.Factory(Checkers),
        ludo=providers.Factory(Ludo),
    )


if __name__ == '__main__':
    game_type = sys.argv[1].lower()
    player1 = sys.argv[2].capitalize()
    player2 = sys.argv[3].capitalize()

    container = Container()

    selected_game = container.game_factory(game_type, player1, player2)
    selected_game.play()

    # $ python factory_aggregate.py chess John Jane
    # John and Jane are playing chess
    #
    # $ python factory_aggregate.py checkers John Jane
    # John and Jane are playing checkers
    #
    # $ python factory_aggregate.py ludo John Jane
    # John and Jane are playing ludo