Ivan Levkivskyi <levkivs...@gmail.com> added the comment:
> Could we revert abstract types in `typing` to respond True to > `isinstance(..., type)` again? No, making them classes will cause significant performance penalty (I don't remember numbers now, but importing `typing` may be twice slower). Plus this will re-introduce some bugs and inconsistencies. > I don't want singledispatch, or any other library like it, to have to > special-case typing. I didn't propose this. I proposed to allow all objects that pretend to be types but are not actually instances of `type`. ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue34498> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
