Message 85099 - Python tracker

Message85099

Author	rhettinger
Recipients	facundobatista, jdunck, lorg, mark.dickinson, rhettinger
Date	2009-04-01.21:30:49
SpamBayes Score	0.0059862155
Marked as misclassified	No
Message-id	<1238621452.04.0.782509121853.issue2531@psf.upfronthosting.co.za>
In-reply-to

Content
Mark, I looked at your patch again and think we should support relaxed conversions for ordering comparisons but not equality/inequality. This will improve on the current situation where we get flat-out misleading results for <, <=, >, and >=. It keeps the status quo for equality/inequality and thereby avoids the problems with __hash__. The only thing that I don't like about it is that you can't do the usual reasoning where "not a<b and not a>b" implies "a==b". Still, it is an improvement over "a<b" giving a completely useless and misleading result.

Content

Mark, I looked at your patch again and think we should support relaxed
conversions for ordering comparisons but not equality/inequality.  This
will improve on the current situation where we get flat-out misleading
results for <, <=, >, and >=.  It keeps the status quo for
equality/inequality and thereby avoids the problems with __hash__.

The only thing that I don't like about it is that you can't do the usual
reasoning where "not a<b and not a>b" implies "a==b".  Still, it is an
improvement over "a<b" giving a completely useless and misleading result.

History
Date	User	Action	Args
2009-04-01 21:30:52	rhettinger	set	recipients: + rhettinger, facundobatista, mark.dickinson, jdunck, lorg
2009-04-01 21:30:52	rhettinger	set	messageid: <1238621452.04.0.782509121853.issue2531@psf.upfronthosting.co.za>
2009-04-01 21:30:50	rhettinger	link	issue2531 messages
2009-04-01 21:30:49	rhettinger	create