python多进程通信

#/usr/bin/env python
#-*- coding:utf-8-*-

import os
import time
import random
from multiprocessing import Process,Queue

def put_data(q,urls):
    print("Process %s Running..."%(os.getpid()))
    for url in urls:
        q.put(url)
        print("put %s in queue..."%url)
        time.sleep(random.randint(1,3))

def get_data(q):
    print("Process %s Running..."%(os.getpid()))
    while True:
        url=q.get(True)
        print("get %s from queue..."%url)


if __name__=='__main__':
    print("Main Process %s Running..."%(os.getpid()))
    q=Queue()
    writer_process1=Process(target=put_data,args=(q,['url1','url2','url3']))
    writer_process2=Process(target=put_data,args=(q,['url5','url6','url7']))
    writer_process3=Process(target=put_data,args=(q,['url5','url6','url7']))
    reader_process=Process(target=get_data,args=(q,))

    writer_process1.start()
    writer_process2.start()
    writer_process3.start()
    reader_process.start()