maybe you should look at subprocess module I have one expamle, this is Linux though
>>> import subprocess as sp
>>> p1 = sp.Popen(["ls", "-l"], stdout = sp.PIPE)
>>> p2 = sp.Popen(["wc", "-c"], stdin = p1.stdout, stdout = sp.PIPE)
>>> print p2.stdout.read()
226
hth, Daniel
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