On Sat, 8 Aug 2020 at 02:34, Stephan Hoyer <sho...@gmail.com> wrote: > I'm sorry, I did a poor job of editing this. > > To fill in my missing word: From my perspective, the *only* reasonable way to > add keyword arguments to indexing would be in a completely backwards > compatible way with **kwargs.
Let me clarify that I don't like the kwargs solution to the current getitem, and the reason is simple. The original motivation for PEP-472 was to do axis naming, that is, to be sure you would be able to clearly indicate (if you so wished) data[23, 2] explicitly as e.g. data[day=23, detector=2] or data[detector=2, day=23] If you have **kwargs, now the first case would send the two values to the nameless index, the second case to the kwargs, and inside the getitem you would have to reconcile the two, especially if someone then writes data[24, 5, day=23, detector=2] typing of course has the same issue. What this extended syntax is supposed to be used for is to define specialisation of generics. but it's difficult to now handle the cases List[Int] vs List[T=Int] vs List[Int, T=int], which are really telling the same thing the first two, and something wrong (TypeError multiple arguments) the second. -- Kind regards, Stefano Borini _______________________________________________ Python-ideas mailing list -- python-ideas@python.org To unsubscribe send an email to python-ideas-le...@python.org https://mail.python.org/mailman3/lists/python-ideas.python.org/ Message archived at https://mail.python.org/archives/list/python-ideas@python.org/message/FW453Q3PMRP6ECNATRPCSLQNNCROFOG6/ Code of Conduct: http://python.org/psf/codeofconduct/
