#!/usr/bin/python

 import multiprocessing,time

 def A(cond):

     name=multiprocessing.current_process().name

     print "starting",name

     with cond:

         print "%s is done and next is ready"%name

         cond.notify_all()

 def B(cond):

     name=multiprocessing.current_process().name

     print "starting",name

     with cond:

         cond.wait()

         print "%s running..."%name

 cond=multiprocessing.Condition()

 m=multiprocessing.Process(target=A,args=(cond,))

 n=[multiprocessing.Process(target=B,name="Process2[%d]"%i,args=(cond,)) for i in range(1,3)]

 for i in n:

     i.start()

     time.sleep(2)

 m.start()

 m.join()

 for i in n:

     i.join()