gistfile1.py

import os
import sys
import time


expected = 7340


while True:
    child = os.fork()
    if child == expected:
        break
    if child == 0:
        if os.getpid() == expected:
            break
        os._exit(0)
    else:
        os.waitpid(child, 0)
        print child

print 'Keeping process alive after it was found'
time.sleep(100000)