python multiprocessing set spawning process to wait

Question

Is it possible to spawn some processes and set the spawning process to wait until the spawned processes finish? Bellow is an example I have used.

import multiprocessing
import time
import sys

def daemon():
    p = multiprocessing.current_process()
    print 'Starting:', p.name, p.pid
    sys.stdout.flush()
    time.sleep(2)
    print 'Exiting :', p.name, p.pid
    sys.stdout.flush()

def non_daemon():
    p = multiprocessing.current_process()
    print 'Starting:', p.name, p.pid
    sys.stdout.flush()
    print 'Exiting :', p.name, p.pid
    sys.stdout.flush()

if __name__ == '__main__':
    d = multiprocessing.Process(name='daemon', target=daemon)
    d.daemon = True

    n = multiprocessing.Process(name='non-daemon', target=non_daemon)
    n.daemon = False

    print "start main"
    d.start()
    time.sleep(1)
    n.start()
    print "stop main"

will print

start main
Starting: daemon 2809
stop main
Starting: non-daemon 2810
Exiting : non-daemon 2810

while I would like to have:

start main
messages from other services 
stop main

Answer 1

d.join() will block the main thread until d finishes. So, to get the order of print statements you desire, put the join s before print "stop main" :

print "start main"
d.start()
time.sleep(1)
n.start()
d.join()
n.join()
print "stop main"