Multiprocessing Queue in Python

Question

I\'m trying to use a queue with the multiprocessing library in Python. After executing the code below (the print statements work), but the processes do not quit after I call

Answer 1

The code below may not be very relevant but I post it for your comments/feedbacks so we can learn together. Thank you!

import multiprocessing

def boss(q,nameStr):
  source = range(1024)
  for item in source:
    q.put(nameStr+' '+str(item))
  q.put(None) # send termination sentinel, one for each process

def worker(q,nameStr):
  while True:
     item = q.get()
     if item is None: # detect sentinel
       break
     print '%s processed %s' % (nameStr,item) # do something useful

q = multiprocessing.Queue()

procs = []

num_procs = 4
for i in range(num_procs):
  nameStr = 'ID_'+str(i)
  p = multiprocessing.Process(target=worker, args=(q,nameStr))
  procs.append(p)
  p = multiprocessing.Process(target=boss,   args=(q,nameStr))
  procs.append(p)

for j in procs:
  j.start()
for j in procs:
  j.join()