[issue21859] Add Python implementation of FileIO

[Serhiy Storchaka]

New submission from Serhiy Storchaka:

Proposed patch adds Python implementation of FileIO in _pyio. This will help to make io and _pyio dependency on _io optional (issue17984).

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components: IO, Library (Lib)
files: pyio_fileio.patch
keywords: patch
messages: 221449
nosy: alex, benjamin.peterson, hynek, pitrou, serhiy.storchaka, stutzbach
priority: normal
severity: normal
stage: patch review
status: open
title: Add Python implementation of FileIO
type: enhancement
versions: Python 3.5
Added file: http://bugs.python.org/file35769/pyio_fileio.patch

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<http://bugs.python.org/issue21859>
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