【[email protected]】queue模块-生产者消费者问题

python通过queue模块来提供线程间的通信机制，从而可以让线程分项数据。

个人感觉queue就是管程的概念

一个生产者消费者问题

 1 from random import randint
 2 from threading import Thread
 3 from queue import Queue
 4 from time import sleep
 5
 6
 7 def writeq(queue):
 8     print(‘starting put queue...‘)
 9     queue.put(‘hahaha‘, 1)　　　　　　　　　　#1表示在有可用空间前，阻塞
10     print(‘size now‘, queue.qsize())
11
12
13 def readq(queue):
14     print(‘starting get queue...‘)
15     val = queue.get(1)　　　　　　　　　　　　　　#1表示在有可用元素前阻塞
16     print(‘consume from queu...size now‘, queue.qsize())
17
18
19 def writer(queue, loops):
20     for i in range(loops):
21         writeq(queue)
22         sleep(randint(1, 3))
23
24
25 def reader(queue, loops):
26     for i in range(loops):
27         readq(queue)
28         sleep(randint(2, 5))
29
30
31 funcs = [writer, reader]
32
33
34 def main():
35     nloops = randint(2, 5)
36     q = Queue(32)
37
38     threads = []
39     for i in range(len(funcs)):
40         t = Thread(target=funcs[i], args=(q, nloops))
41         threads.append(t)
42
43     for i in range(len(funcs)):
44         threads[i].start()
45
46     for i in range(len(funcs)):
47         threads[i].join()
48
49     print(‘all done‘)
50
51 if __name__ == ‘__main__‘:
52     main()

输出结果：