On Sat, Dec 26, 2020 at 06:52:46PM -0800, Brendan Barnwell wrote: > On 2020-12-26 18:44, Steven D'Aprano wrote: > >>>> >I think if we were designing mapping protocols now, that would be an > >>>> >excellent idea, but we aren't, we have decades of history from `dict` > >>>> >behind us. And protocols from dict use `keys()` and getitem. E.g. > >>>> >update. > >>> > >>> What do you mean by "protocols from dict"? What are these protocols? > >"And protocols from dict use `keys()` and getitem. E.g. update." > > If I understand you right, that's not a protocol, that's just the > behavior of the dict type specifically. As far as I can tell, it's not > even documented behavior, so it doesn't constrain anything.
Yes it is documented: help(dict.update) and it was intentionally the inspiration for the behaviour of dict augmented assignment. If you want to argue it's not a protocol, just an interface, okay, it's an interface. That's a difference that makes no difference. -- Steve _______________________________________________ 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/2RBFMYAZ4QA2W4ZITAZVECBOF6WZST2E/ Code of Conduct: http://python.org/psf/codeofconduct/