bpo-32248: Introduce the concept of Loader.get_resource_reader() by brettcannon · Pull Request #5108 · python/cpython (original) (raw)
For loaders that wish to provide resource reading, they should now implement get_resource_reader(fullname) to return an object compatible with importlib.abc.ResourceReader.
importlib.abc.ResourceLoader has also been documented as deprecated as ResourceReader is more well-defined, full API for similar purposes.