constantly updating dict

gistfile1.py

from multiprocessing import Process, Lock, Manager
from time import sleep

def update_dict(cls, db, lock):
    temp_db = {}
    while True:
        lock.acquire()
        try:
            temp_db['userRatings'] = db['userRatings'] + 1
            temp_db['venueToVenue'] = db['venueToVenue'] +1
            temp_db['todo'] = db['todo'] + 1
            cls.db_data = temp_db
        finally:
            lock.release()

if __name__ == "__main__":
    manager = Manager()
    db_data = manager.dict()
    db_data['userRatings'] = 1
    db_data['venueToVenue'] = 2
    db_data['todo'] = 3
    lock = Lock()
    p = Process(target=update_dict, args=(db_data,lock))
    p.start()
    print db_data
    while True:
        sleep(1)
        print db_data