On Fri, Oct 7, 2016 at 7:47 AM, Serhiy Storchaka <storch...@gmail.com> wrote: > On 07.10.16 17:37, Guido van Rossum wrote: >> >> On Fri, Oct 7, 2016 at 6:36 AM, Serhiy Storchaka <storch...@gmail.com> >> wrote: >>> >>> A number of builtin iterator classes (but not all builtin iterator >>> classes) >>> are registered with the Iterator ABC in Lib/_collections_abc.py. But >>> isinstance(it, Iterable) check works without explicit registration, >>> because >>> Iterable has __subclasshook__ that checks iterator methods. Is there a >>> need >>> in explicit registrations? Or their can be safely removed? >> >> >> The preferred apprach is actually inheritance; registration comes >> next; the __subclasshook__ is a final compromise to the tradition of >> duck typing. I think the registrations should stay. > > > Should we register missed builtin iterators? For example longrange_iterator.
I don't feel strongly about this either way. Let sleeping dogs lie, etc. (Is this related to issue 26906?) -- --Guido van Rossum (python.org/~guido) _______________________________________________ Python-Dev mailing list Python-Dev@python.org https://mail.python.org/mailman/listinfo/python-dev Unsubscribe: https://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
