Citește codul cu atenție

class Plugin:
    registry = {}

    def __init_subclass__(cls, **kwargs):
        super().__init_subclass__(**kwargs)
        Plugin.registry[cls.__name__] = cls


class ImageProcessor(Plugin):
    pass


class TextProcessor(Plugin):
    pass


print(sorted(Plugin.registry.keys()))
print(Plugin.registry["ImageProcessor"].__name__)


class TaggedPlugin:
    def __init_subclass__(cls, *, tag="unset", **kwargs):
        super().__init_subclass__(**kwargs)
        cls.tag = tag


class A(TaggedPlugin, tag="alpha"):
    pass


print(A.tag)

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