From blog post: http://lextoumbourou.com/blog/posts/what-are-zombie-processes-unix/

fork_ppid.py

from os import fork, getppid
from time import sleep

pid = fork()

if pid == 0: # We're in the child process
    print "Child process up in this."
    print "My parent is", getppid()
else:
    print "Parent here, I just created child", pid
    # Sleep for a second to avoid being dropped back to the shell when the parent finishes
    sleep(1)