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Author terry.reedy
Recipients brett.cannon, eric.snow, kimiguel, pablogsal, rhettinger, terry.reedy
Date 2020-03-07.10:23:43
SpamBayes Score -1.0
Marked as misclassified Yes
Message-id <[email protected]>
In-reply-to
Content 
The only specification is that len(ob) calls ob.__len__ and that ob.__len__ should return an 'integer >= 0'.  (Adding side effects goes beyond that spec.)  I agree that a detectable internal in list is not a bug.  Unless there is a realistic performance enhancement in caching the result of the first call, this issue should be closed.
History
Date User Action Args
2020-03-07 10:23:44terry.reedysetrecipients: + terry.reedy, brett.cannon, rhettinger, eric.snow, pablogsal, kimiguel
2020-03-07 10:23:44terry.reedysetmessageid: <[email protected]>
2020-03-07 10:23:44terry.reedylinkissue39829 messages
2020-03-07 10:23:44terry.reedycreate