Message 151717 - Python tracker

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In-reply-to
Author	terry.reedy
Recipients	ezio.melotti, ncoghlan, terry.reedy, yak
Date	2012年01月21日.04:03:29
SpamBayes Score	0.0003757951
Marked as misclassified	No
Message-id	<1327118610.71.0.185139816508.issue13814@psf.upfronthosting.co.za>

Content
Calling g.close() is pointless for a generator used in normal pull mode and run to completion, as in the example. The generator is already 'closed', so g.close() does not do anything useful. See http://docs.python.org/py3k/reference/expressions.html#yield-expressions The method was added to be used with .send() so that generators used in push mode could be told to finish up when there is nothing more to send. For such rare uses, contextlib.closing should usually be sufficient, I think. So I think this issue should be closed.

Content

Calling g.close() is pointless for a generator used in normal pull mode and run to completion, as in the example. The generator is already 'closed', so g.close() does not do anything useful. See
http://docs.python.org/py3k/reference/expressions.html#yield-expressions
The method was added to be used with .send() so that generators used in push mode could be told to finish up when there is nothing more to send. For such rare uses, contextlib.closing should usually be sufficient, I think.
So I think this issue should be closed.

History
Date	User	Action	Args
2012年01月21日 04:03:30	terry.reedy	set	recipients: + terry.reedy, ncoghlan, ezio.melotti, yak
2012年01月21日 04:03:30	terry.reedy	set	messageid: <1327118610.71.0.185139816508.issue13814@psf.upfronthosting.co.za>
2012年01月21日 04:03:30	terry.reedy	link	issue13814 messages
2012年01月21日 04:03:29	terry.reedy	create

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