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<p>PEP 591 specifies a final decorator that intends to restrict subsclassing for those classes with the giving decorator as well as overriding methods with this annotation. It plays nicely with the @overload decorator, although a type checker such as mypy would require the @final decorator to be put last. As any typing implementation, it's not going to be enforced at runtime if no runtime type checker is being used. For more info, see </p>
https://www.python.org/dev/peps/pep-0591/
Carlos Coelho
Posted on
December 12, 2019
Topics:
python, typing
