Guido van Rossum added the comment: The abstract base class would be an ABC providing documentation and a template for implementations, and a way to test using isinstance(). This is how several other ABCs are used that have no particularly useful default implementation.
In addition, the presence of the ABC provides a reference for corresponding class in the typing module (used to express type hints using PEP 484) -- again this is just following the example of the other ABCs. ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue25609> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
