Container copying ----------------- You can create declarative container copies using ``@containers.copy()`` decorator. .. literalinclude:: ../../examples/containers/declarative_copy_decorator1.py :language: python :lines: 3- :emphasize-lines: 18-22 Decorator ``@containers.copy()`` copies providers from source container to destination container. Destination container provider will replace source provider, if names match. Decorator ``@containers.copy()`` helps you when you create derived declarative containers from the base one. Base container often keeps default dependencies while derived containers define overriding providers. Without ``@containers.copy()`` decorator, overridden providers are available in the derived container, but base class dependencies continue to be bound to the base class providers. .. literalinclude:: ../../examples/containers/declarative_copy_decorator2.py :language: python :lines: 11- .. disqus::