生产者消费者模型

from multiprocessing import Process,Queue
import time

def producer(q):
    for i in range(6):
        res = ‘包子%s‘ %i
        time.sleep(0.5)
        print(‘生产者生产了%s‘%res)

        q.put(res)

def cosumer(q):

    while True:
        res = q.get()
        if res is None:break
        time.sleep(2)

        print(‘消费者吃了%s‘%res)

if __name__ == ‘__main__‘:
    q = Queue()
    #生产者们
    p = Process(target=producer,args=(q,))

    #消费者们
    c1 = Process(target=cosumer,args=(q,))

    p.start()
    c1.start()
    p.join()
    q.put(None)   #如果是多个消费者，就用多个q.put(None)
    print(‘主进程‘)