Oh, that’s fair. I don’t think we should update Mapping or MutableMapping. People who want this for their own class can override __or__ and __ror__.
On Wed, Dec 4, 2019 at 11:19 Serhiy Storchaka <storch...@gmail.com> wrote: > 04.12.19 20:18, Guido van Rossum пише: > > On Tue, Dec 3, 2019 at 2:10 AM Serhiy Storchaka > > <storch...@gmail.com > > <mailto:storch...@gmail.com>> wrote: > > > > And the same question for |. Should `{} | Mapping()` and `{} | []` > work? > > > > > > Ditto -- {} | Mapping() should work, but {} | [] should not. > > set() | Set() falls back to Set.__ror__. collection.abc.Set.__ror__ is > defined, but you suggested to not define it for collection.abc.Mapping. > _______________________________________________ > 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/GAIB5HSOSHHH27DVB2OQCMQ2U4LBZEJO/ > Code of Conduct: http://python.org/psf/codeofconduct/ > -- --Guido (mobile)
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