Glenn Linderman <v+pyt...@g.nevcal.com> added the comment:
Looking at the code the way I've used it in my modified server.py:
stderr = []
stderr_thread = threading.Thread(target=self._readerthread,
args=(p.stderr, stderr))
stderr_thread.daemon = True
stderr_thread.start()
self.log_message("writer: %s" % str( nbytes ))
stdin_thread = threading.Thread(target=self._writerthread,
args=(self.rfile, p.stdin, nbytes))
stdin_thread.daemon = True
stdin_thread.start()
and later
stderr_thread.join()
stdin_thread.join()
p.stderr.close()
p.stdout.close()
if stderr:
stderr = stderr[ 0 ].decode("UTF-8")
It seems like this sort of code (possibly passing in the encoding) could be
bundled back inside subprocess (I borrowed it from there).
It also seems from recent discussion on npopdev that the cheat-sheet "how to
replace" other sys and os popen functions would be better done as wrapper
functions for the various cases. Someone pointed out that the hard cases
probably aren't cross-platform, but that currently the easy cases all get
harder when using subprocess than when using the deprecated facilities. They
shouldn't. The names may need to be a bit more verbose to separate the various
use cases, but each use case should remain at least as simple as the prior
function.
So perhaps instead of just subprocess.PIPE to select particular handling for
stdin, stdout, and stderr, subprocess should implement some varieties to handle
attaching different types of reader and writer threads to the handles... of
course, parameters need to come along for the ride too: maybe the the
additional variations would be object references with parameters supplied,
instead of just a manifest constant like .PIPE.
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<http://bugs.python.org/issue10482>
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