Author abarnert
Recipients abarnert, martin.panter, ncoghlan, r.david.murray, serhiy.storchaka
Date 2016-01-01.21:29:09
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Message-id <1451683749.6.0.596457699138.issue25958@psf.upfronthosting.co.za>
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> Also, if I understand your problem, Container would also be susceptible in theory

You're right, but not in the details.

Being iterable (whether via __iter__ or via the old-style sequence protocol) makes you a container. But, again, false negatives for Container aren't a problem.

But blocking that by setting __contains__ = None makes you a Container but not a container, the same kind of false positive as #25864. That's exactly why I split off this bug from that one--that one only fixes __iter__ and __reversed__, but it's possible that a more general solution is needed. (Or, of course, maybe we don't need anything more general, we just need to expand it to __iter__, __reversed__, and __contains__.)
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2016-01-01 21:29:09abarnertsetrecipients: + abarnert, ncoghlan, r.david.murray, martin.panter, serhiy.storchaka
2016-01-01 21:29:09abarnertsetmessageid: <1451683749.6.0.596457699138.issue25958@psf.upfronthosting.co.za>
2016-01-01 21:29:09abarnertlinkissue25958 messages
2016-01-01 21:29:09abarnertcreate