Thank you, I wasn't paying attention enough. It works as you describe.

On Tue, Dec 4, 2012 at 9:46 PM, R. David Murray <report@bugs.python.org>wrote:

>
> R. David Murray added the comment:
>
> The only way I was able to replicate that result was by removing the
> entire try/except block, including the yield.  In that case, wrap is no
> longer a generator, so the exception is raised before you enter the for
> loop.
>
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> <http://bugs.python.org/issue16610>
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