subprocess.Popen and ordering writes to stdout and stderr

[Chris Withers]

exarkun at twistedmatrix.com wrote:
> libc is probably giving you line buffering when you use os.system 
> (because the child process inherits the parent's stdio, and the parent's 
> stdio is probably a pty, and that's the policy libc implements).

<snip>

Interesting, but do these assertions still hold true when I tell you 
that I'm doing all this on Windows? ;-)

Chris

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