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

fork.py

from os import fork
from time import sleep

# Fork the process
pid = fork()

if pid == 0: # We're in the child process
    print "Child process up in this."
else: # We're in the parent process
    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)