Serhiy Storchaka <storchaka+cpyt...@gmail.com> added the comment:
I am for consistent behavior. If return GenericAlias(GenericAlias(tuple, Unpack[Ts]), (int, str)) for tuple[*Ts][int, str], we should also return GenericAlias(GenericAlias(list, T), int) for list[T][int], etc. And it will cause multiple problems: * A repr can be less readable. * It will break equality comparison and hashing. Good bye caching. * What about __origin__, __parameters__, __args__? How will they be calculated? * It can break code which uses annotations for something. For example it can break dataclasses. It may be that will need to use it as a fallback for cases like tuple[T, *Ts][*Ts2] (currently it is error). But I am not sure that such cases should be supported. ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue47006> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
