Message 287269 - Python tracker

➜

This issue tracker has been migrated to GitHub , and is currently read-only.
For more information, see the GitHub FAQs in the Python's Developer Guide.

In-reply-to
Author	Eric Lafontaine
Recipients	Eric Lafontaine, christian.heimes, docs@python, ezio.melotti, mark.dickinson, nparikh, r.david.murray, vstinner
Date	2017年02月08日.01:34:45
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1486517685.55.0.986678037681.issue16011@psf.upfronthosting.co.za>

Content
oh, I've got what you meant! Proposed change : For user-defined classes which define the __contains__() method, the in operator will convert to False "x in y" if y.__contains__(x) return False, 0 or None. Otherwise, the in operator will return True for any other value being returned by y.__contains__(x). Would that make more sense? Regards, Eric Lafontaine

Content

oh, I've got what you meant!
Proposed change :
For user-defined classes which define the __contains__() method, the in operator will convert to False "x in y" if y.__contains__(x) return False, 0 or None. Otherwise, the in operator will return True for any other value being returned by y.__contains__(x).
Would that make more sense?
Regards,
Eric Lafontaine

History
Date	User	Action	Args
2017年02月08日 01:34:45	Eric Lafontaine	set	recipients: + Eric Lafontaine, mark.dickinson, vstinner, christian.heimes, ezio.melotti, r.david.murray, docs@python, nparikh
2017年02月08日 01:34:45	Eric Lafontaine	set	messageid: <1486517685.55.0.986678037681.issue16011@psf.upfronthosting.co.za>
2017年02月08日 01:34:45	Eric Lafontaine	link	issue16011 messages
2017年02月08日 01:34:45	Eric Lafontaine	create

homepage