Message 292140 - Python tracker

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Author	vstinner
Recipients	mark.dickinson, rhettinger, serhiy.storchaka, terry.reedy, vstinner
Date	2017年04月22日.22:05:05
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<CAMpsgwYGTJV-CHv2ksZTpNC6AaeqWNyO+uugQChtDGaLN_i9Ug@mail.gmail.com>
In-reply-to	<1492874298.57.0.148487490346.issue29840@psf.upfronthosting.co.za>

Content
If someone wants to return a value larger than maxsize and support bool(): it is already possible right now by defining a __bool__ method no? If yes, I suggest to only document this CPython implementation detail (consequence of slots, for efficiency) and suggest to use __bool__ for such corner case. I also dislike retrying to call "__len__" method instead of the slot. It can have annoying side effects.

Content

If someone wants to return a value larger than maxsize and support bool():
it is already possible right now by defining a __bool__ method no? If yes,
I suggest to only document this CPython implementation detail (consequence
of slots, for efficiency) and suggest to use __bool__ for such corner case.
I also dislike retrying to call "__len__" method instead of the slot. It
can have annoying side effects.

History
Date	User	Action	Args
2017年04月22日 22:05:05	vstinner	set	recipients: + vstinner, rhettinger, terry.reedy, mark.dickinson, serhiy.storchaka
2017年04月22日 22:05:05	vstinner	link	issue29840 messages
2017年04月22日 22:05:05	vstinner	create

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