import time, os, thread

def f():
    print "I am thread %d in process %d" % (thread.get_ident(),os.getpid())
    time.sleep(1)

ident = thread.start_new_thread(f, ())
print "started thread %d in process %d" % (ident, os.getpid())
time.sleep(0.5)      # give thread a chance to start

pid = os.fork()
if pid == 0:
    ident = thread.start_new_thread(f, ())
    print "started thread %d in process %d" % (ident, os.getpid())
    time.sleep(0.5)      # give thread a chance to start
    os._exit(0)

os.waitpid(pid, 0)