Create a shared dictionary in python to store events

Question

I'm trying to create a shared dictionary in python which should hold created events.

# prepare shared dictionary which will hold our events
mgr = multiprocessing.Manager()
event_storage = mgr.dict()

# start webserver
w = WebServer(server['host'], server['port'])
p = Process(target=w.start, args=(event_storage,))
p.start()

for i, param in enumerate(_DEFS):
    for tc in testcases():
        # create and store event for current testcase
        request_id = get_new_rid()
        event_storage[request_id] = Event()  # problematic line

        # other code...

After executing this code i get an exception: RuntimeError: Condition objects should only be shared between processes through inheritance

Can anyone help me please to solve this problem or give me a hint how to share multiple events between processes?

Edit: My question is especially about the combination shared dictionary and events. The "possible duplicate" doesn't handle the question about sharing Events(). Changing

event_storage[request_id] = Event()  # problematic line

to

 event_storage[request_id] = "test  # problematic line

works - but doesn't solve the problem.