[docs] [issue13322] buffered read() and write() does not raise BlockingIOError

[Antoine Pitrou]

Antoine Pitrou <pitrou at free.fr> added the comment:

Generally I doubt anyone is using the non-blocking semantics of the Python 3 I/O stack.  People doing non-blocking I/O generally do it with sockets instead, which tend to reproduce quite literally the POSIX behaviour and error codes.

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versions:  -Python 3.2, Python 3.3, Python 3.4, Python 3.5, Python 3.8

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