[issue1191964] add non-blocking read and write methods to subprocess.Popen

[Josiah Carlson]

Josiah Carlson added the comment:

Okay, I'm sorry for falling asleep at the wheel on this. At this point, I don't expect this to go in for 3.5 - but if it has a chance, I'll do what I need to do to get it there. Let me know.

I agree with the .communicate() not raising on broken pipe, and read/write_nonblocking raising on broken pipe. I'll get a patch in with the comments on the existing code review, along with those changes on Monday or Tuesday.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue1191964>
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