[issue30430] Cannot write to a tun interface file

[Rémy Léone]

New submission from Rémy Léone:

I cannot write certain bytes object to a tun interface file. I've added a working and unworking example in the attached file.
I'm running on Ubuntu16.04 with Python 3.5.2

----------
components: IO
files: simple_incorrect.py
messages: 294143
nosy: Rémy Léone
priority: normal
severity: normal
status: open
title: Cannot write to a tun interface file
versions: Python 3.5
Added file: http://bugs.python.org/file46885/simple_incorrect.py

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<http://bugs.python.org/issue30430>
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