[issue13322] The io module doesn't support non-blocking files

[STINNER Victor]

Change by STINNER Victor <vstinner at python.org>:


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components:  -Documentation, IO
title: buffered read() and write() does not raise BlockingIOError -> The io module doesn't support non-blocking files
versions: +Python 3.9 -Python 2.7, Python 3.6, Python 3.7

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue13322>
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