Georg Brandl <ge...@python.org> added the comment:

Hmm, we don't like these open-for-eternity file descriptors; we had such a 
thing for os.urandom() but removed it (see #1177468).

I'm okay with DEVNULL (or even just NULL) as a shorthand, but it should open 
(and close) the devnull device each time just as if a normal fd was given.

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nosy: +georg.brandl

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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue5870>
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