Message 216445 - Python tracker

I started to review the patch 5:
http://bugs.python.org/review/1191964/#ps11598

When I read unit tests, I realized that I don't like "write_nonblocking" name. It's too generic. A process has many files (more than just stdin, stdout, stderr: see pass_fds parameter of Popen). I would like an explicit "write_stdin_nonblocking" and "read_stdout_nonblocking".