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

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"""Container dependencies check example."""
from dependency_injector import containers, providers
class Container(containers.DeclarativeContainer):
service1 = providers.Dependency()
service2 = providers.Dependency()
if __name__ == '__main__':
container = Container()
container.check_dependencies() # <-- raises error:
# Container has undefined dependencies: "Container.service1", "Container.service2"