a simple example of Python's multiprocessing

multiprocessing_demo.py

import multiprocessing

def f(num, d):
    for i in range(100):
        d['%d:%d'%(num, i)] = 1

if __name__=='__main__':
    ps = []
    m = multiprocessing.Manager()
    d = m.dict()
    for i in range(5):
        p = multiprocessing.Process(target=f, args=(i, d))
        p.start()
        ps.append(p)

    for p in ps: p.join()
    print d