线程之生产者与消费者模式（线程通信，thread+queue）

#python3中
from queue import Queue
from threading import Thread

class Producer(Thread):#生产者
    def run(self):
        global queue
        count = 0
        while True:
            if queue.qsize() < 15:
                for i in range(10):
                    count = count +1
                    msg = '生成产品'+str(count)
                    queue.put(msg)#把数据放入队列
                    print(msg)
            time.sleep(0.5)

class Consumer(Thread):#消费者
    def run(self):
        global queue
        while True:
            if queue.qsize() > 1:#队列不为空，队列大于1
                for i in range(3):
                    msg = self.name + '消费了 '+queue.get()  #取队列中的数据
                    print(msg)
            time.sleep(1)


if __name__ == '__main__':
    queue = Queue()

    # for i in range(500):
    #     queue.put('初始产品'+str(i))
    for i in range(2):
        p = Producer()
        p.start()
    for i in range(5):
        c = Consumer()
        c.start()