python-dependency-injector/examples/containers/dynamic_runtime_creation.py

"""Creation of dynamic container based on the configuration example."""

from dependency_injector import containers, providers


class UserService:
    ...


class AuthService:
    ...


def populate_container(container, providers_config):
    for provider_name, provider_info in providers_config.items():
        provided_cls = globals().get(provider_info['class'])
        provider_cls = getattr(providers, provider_info['provider_class'])
        setattr(container, provider_name, provider_cls(provided_cls))


if __name__ == '__main__':
    services_config = {
        'user': {
            'class': 'UserService',
            'provider_class': 'Factory',
        },
        'auth': {
            'class': 'AuthService',
            'provider_class': 'Factory',
        },
    }
    services = containers.DynamicContainer()

    populate_container(services, services_config)

    user_service = services.user()
    auth_service = services.auth()

    assert isinstance(user_service, UserService)
    assert isinstance(auth_service, AuthService)