Long running Python Parent/Child communication via pipes

gistfile1.py

import subprocess
import time
import sys


def parent():

    p = subprocess.Popen(['python', './testp.py', '--child'], stdin=subprocess.PIPE, stdout=subprocess.PIPE)

    i = 0
    while True:
        i+=1
        p.stdin.write("Hello %d\r\n" % i)
        print "Got: ", p.stdout.readline().strip('\r\n')

        time.sleep(0.1)



def child():

    while True:
        x= raw_input()
        print x


if __name__ == '__main__':

    if '--child' in sys.argv:
        child()

    else:
        parent()