[issue12797] io.FileIO and io.open should support openat

[Antoine Pitrou]

Antoine Pitrou <pitrou at free.fr> added the comment:

> Attached is a patch which adds dirfd= as a keyword argument.

Thanks. Although, on second thought, I'm not sure whether Amaury's idea (allowing a custom opener) is not better... Thoughts?

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue12797>
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