Message 183332 - Python tracker

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In-reply-to
Author	alex
Recipients	alex
Date	2013年03月02日.17:23:39
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1362245019.42.0.972918137955.issue17338@psf.upfronthosting.co.za>

Content
Following the length_hint PEP, we should expose this facility to end-python programmers. The semantics would be basically: the list has behavior identical to if you hadn't provided length_hint, except the VM is free to preallocate efficiently. CPython (and PyPy) use this kind of logic internally all over the place when lists are to be returned (including, but not limited to, list() with a single argument!) If this is considered to be a good idea I'll whip up a patch.

Content

Following the length_hint PEP, we should expose this facility to end-python programmers. The semantics would be basically: the list has behavior identical to if you hadn't provided length_hint, except the VM is free to preallocate efficiently.
CPython (and PyPy) use this kind of logic internally all over the place when lists are to be returned (including, but not limited to, list() with a single argument!)
If this is considered to be a good idea I'll whip up a patch.

History
Date	User	Action	Args
2013年03月02日 17:23:39	alex	set	recipients: + alex
2013年03月02日 17:23:39	alex	set	messageid: <1362245019.42.0.972918137955.issue17338@psf.upfronthosting.co.za>
2013年03月02日 17:23:39	alex	link	issue17338 messages
2013年03月02日 17:23:39	alex	create

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