也许这可以帮助：
import sysimport tempfilefrom subprocess import Popen, PIPEcmd = [sys.executable, '-c', 'print raw_input()']# Using a temp file to give input data to the subprocess instead of stdin.write to avoid deadlocks.with tempfile.TemporaryFile() as f: f.write('foobar') f.seek(0) # Return at the start of the file so that the subprocess p1 can read what we wrote. p1 = Popen(cmd, stdin=f, stdout=PIPE)p2 = Popen(cmd, stdin=p1.stdout, stdout=PIPE)p3 = Popen(cmd, stdin=p2.stdout, stdout=PIPE)# No order needed.p1.stdout.close()p2.stdout.close()# Using communicate() instead of stdout.read to avoid deadlocks. print p3.communicate()[0]输出：
$ python test.pyfoobar
希望这会很幸福。
