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From: Ian Kelly <ian.g.kelly@gmail.com>
Date: Sat, 20 Oct 2012 17:28:32 -0600
Subject: Re: 'generator ignored GeneratorExit''
To: Python <python-list@python.org>
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On Sat, Oct 20, 2012 at 2:03 PM, Charles Hixson
<charleshixsn@earthlink.net> wrote:
> If I run the following code in the same module, it works correctly, but if I
> import it I get the message:
> Exception RuntimeError: 'generator ignored GeneratorExit' in <generator
> object getNxtFile at 0x7f932f884f50> ignored
>
> def getNxtFile (startDir, exts = ["txt", "utf8"]):
>     try:
>         for    path    in    getNxtPath (startDir, exts):
>             try:
>                 fil    =    open (path, encoding = "utf-8-sig")
>                 yield    fil
>             except:
>                 print ("Could not read:  ", path)
>     except    GeneratorExit:
>         raise    StopIteration
>
> The message appears to be purely informational, but I *would* like to fix
> whatever problem it's reporting, and none of the changes that I've tried
> have worked.  What *should* I be doing?

The bare except is probably catching the GeneratorExit exception and
swallowing it.  Try catching a more specific exception like OSError or
even just Exception instead.

Also, you don't need to explicitly catch GeneratorExit just to raise
StopIteration.  The generator will normally stop on GeneratorExit,
provided the exception is actually able to propagate up.