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Author rhettinger
Recipients Zero, docs@python, r.david.murray, rhettinger, terry.reedy, veky
Date 2017-07-17.15:05:53
SpamBayes Score -1.0
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Message-id <1500303953.75.0.399739379585.issue18558@psf.upfronthosting.co.za>
In-reply-to
Content 
> Or at least, if we cannot do that because of backward
> compatibility:-(, to explicitly document that Iterable ABC
> _does not_ fully encompass what we mean by "being iterable".

That would be a reasonable amendment to collections.abc.Iterable docs.

I don't think it is either desirable or possible for collections.abc.Iterable to recognize iterables with __getitem__.  We cannot know it advance whether __getitem__ is a mapping or a sequence.  IIRC, that particular problem was the motivation for creating the ABCs. Without a user registering a class as Iterable or without inheriting from Iterable, there is really no way to know.
History
Date User Action Args
2017-07-17 15:05:53rhettingersetrecipients: + rhettinger, terry.reedy, r.david.murray, Zero, docs@python, veky
2017-07-17 15:05:53rhettingersetmessageid: <1500303953.75.0.399739379585.issue18558@psf.upfronthosting.co.za>
2017-07-17 15:05:53rhettingerlinkissue18558 messages
2017-07-17 15:05:53rhettingercreate