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To: python-list@python.org
From: Terry Reedy <tjreedy@udel.edu>
Subject: Re: Possible File iteration bug
Date: Fri, 15 Jul 2011 17:47:28 -0400
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Xref: x330-a1.tempe.blueboxinc.net comp.lang.python:9575

On 7/15/2011 10:42 AM, Billy Mays wrote:
> On 07/15/2011 10:28 AM, Thomas Rachel wrote:
>> Am 15.07.2011 14:52 schrieb Billy Mays:

>>> Really what would be useful is some sort of PauseIteration Exception
>>> which doesn't close the generator when raised, but indicates to the
>>> looping header that there is no more data for now.
>>
>> a None or other sentinel value would do this as well (as ChrisA already
>> said).

> A sentinel does provide a work around, but it also passes the problem
> onto the caller rather than the callee:

No more so than a new exception that the caller has to recognize.

-- 
Terry Jan Reedy