Hi all, I very much share Stephan's opinion here and look forward to integrating the new PEP 646 variadics into numpy. In the context of numpy (and tensor typing general): the typing of array shapes is a fairly complicated subject and the introduction of variadics will likely play in big role in laying its foundation, as it allows for the expression of both dimensioability as well as basic shape manipulation . All in all, I'm very interested in where both PEP 646 and future PEPs will take us and look forward to further developments. Regards, Bas van Beek