生产者/消费者模型

生产者把产品制造出来后放入队列，

消费者从队列中取产品，

消费的速度必须小于生产的速度，否则就倒闭了。。。

代码：

#!/usr/bin/env python3
#-*- coding:utf-8 -*-

from threading import Thread
import time
import random
import queue



q1 = queue.Queue(5)


def consumer(num):
    while True:
        time.sleep(5)
        data = q1.get_nowait()
        print('Custom %d eating '%num + data )

def producer(worker):
    while True:
        if q1.qsize() < 2:
            print (" %s is  Making pizza " % worker)
            time.sleep(1)
            q1.put('a pizza made by %s' %worker )


if __name__ == "__main__":
    worker1 = Thread(target=producer , args=('alben',))
    worker2 = Thread(target=producer , args=('nichole',))
    com1 = Thread(target=consumer, args=(1,))
    com2 = Thread(target=consumer, args=(2,))
    com3 = Thread(target=consumer, args=(3,))
    worker1.start()
    worker2.start()
    com1.start()
    com2.start()
    com3.start()