Message 65752 - Python tracker

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Author	rhettinger
Recipients	belopolsky, jameinel, rhettinger
Date	2008-04-24.21:24:48
SpamBayes Score	0.006256418
Marked as misclassified	No
Message-id	<1209072289.81.0.669976050802.issue2672@psf.upfronthosting.co.za>
In-reply-to

Content
John, when y=[], the update method has to create a new list iterator on each invocation. But when y is a genexp, it is self-iterable (iow, iter (y) will return self, not a new object). Also, when doing timings, it can be helpful to factor-out the attribute lookup: python -m timeit -s 'x=set(range(10000)); y=[]; xu=x.update' 'xu(y)'

John, when y=[], the update method has to create a new list iterator on 
each invocation.  But when y is a genexp, it is self-iterable (iow, iter
(y) will return self, not a new object).

Also, when doing timings, it can be helpful to factor-out the attribute 
lookup:

python -m timeit -s 'x=set(range(10000)); y=[]; xu=x.update' 'xu(y)'

History
Date	User	Action	Args
2008-04-24 21:24:50	rhettinger	set	spambayes_score: 0.00625642 -> 0.006256418 recipients: + rhettinger, belopolsky, jameinel
2008-04-24 21:24:49	rhettinger	set	spambayes_score: 0.00625642 -> 0.00625642 messageid: <1209072289.81.0.669976050802.issue2672@psf.upfronthosting.co.za>
2008-04-24 21:24:48	rhettinger	link	issue2672 messages
2008-04-24 21:24:48	rhettinger	create