#! /usr/bin/python

from subprocess import Popen, PIPE, STDOUT

for i in range(10000):
    print i

    if 1:
        p = Popen(['true'])
    else:
        p = Popen(['true'], stdin=PIPE, stdout=PIPE, stderr=STDOUT)

    if 1:
        p.communicate()
    else:
        if p.stdin:
            p.stdin.close()
        if p.stdout:
            p.stdout.read()
            p.stdout.close()
        p.wait()