"""`Singleton` provider resetting example.""" from dependency_injector import containers, providers class UserService: ... class Container(containers.DeclarativeContainer): user_service_provider = providers.Singleton(UserService) if __name__ == "__main__": container1 = Container() user_service1 = container1.user_service_provider() assert user_service1 is container1.user_service_provider() container2 = Container() user_service2 = container2.user_service_provider() assert user_service2 is container2.user_service_provider() assert user_service1 is not user_service2