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From: Ian Kelly <ian.g.kelly@gmail.com>
Date: Mon, 12 May 2014 16:16:22 -0600
Subject: Re: Everything you did not want to know about Unicode in Python 3
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Xref: csiph.com comp.lang.python:71404

On Mon, May 12, 2014 at 1:42 PM, MRAB <python@mrabarnett.plus.com> wrote:
> How about checking sys.stdin.mode and sys.stdout.mode?

Seems to work, but I notice that the docs only define the mode
attribute for the FileIO class, which sys.stdin and sys.stdout are not
instances of.