Message 69145 - Python tracker

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Author	rhettinger
Recipients	amaury.forgeotdarc, gvanrossum, rhettinger
Date	2008-07-02.23:24:04
SpamBayes Score	0.019279445
Marked as misclassified	No
Message-id	<1215041045.27.0.978650699893.issue3263@psf.upfronthosting.co.za>
In-reply-to

Content
I don't think we should build in explicit support for bad designs that violate the Liskov substitution principle. Are there any valid use cases for wanting non-hashable subclasses of hashable classes? If for some reason, this feature survives, it would be better to use NotImplemented instead of None.

I don't think we should build in explicit support for bad designs that 
violate the Liskov substitution principle. Are there any valid use 
cases for wanting non-hashable subclasses of hashable classes?

If for some reason, this feature survives, it would be better to use 
NotImplemented instead of None.

History
Date	User	Action	Args
2008-07-02 23:24:05	rhettinger	set	spambayes_score: 0.0192794 -> 0.019279445 recipients: + rhettinger, gvanrossum, amaury.forgeotdarc
2008-07-02 23:24:05	rhettinger	set	spambayes_score: 0.0192794 -> 0.0192794 messageid: <1215041045.27.0.978650699893.issue3263@psf.upfronthosting.co.za>
2008-07-02 23:24:04	rhettinger	link	issue3263 messages
2008-07-02 23:24:04	rhettinger	create