import ipcbroker

# in main process
broker = ipcbroker.Broker().start()

# create clients before starting all processes
alice = ipcbroker.Client(broker)
bob = ipcbroker.Client(broker)

import time
# in child process (with a client as parameter)
def add(a, b):
    return a + b

alice.start()    
alice.register_function('add', add) 
# wait for registering of other process
time.sleep(2)

# call own add function
alice.add(2, 3)     # returns 5

# or bobs sub function
alice.sub(5, 2)     # return 3

import time
# in another child process
def sub(a, b):
    return a - b

bob.start()
bob.register_function('sub', sub)
time.sleep(2)
# call alice's add function
bob.add(2, 3)       # returns 5