关于python:python-生产消费案例1

#!/usr/bin/env python#-*- coding:utf-8 -*-import threading,random,timeVALUE = 1000Lock = threading.Lock()class Product(threading.Thread):    def run(self):        global VALUE        while True:            m = random.randint(100,500)            Lock.acquire()            VALUE += m            print('%s 生成了数字 %s ，当初数字大小为 %s ' %(threading.current_thread(),m,VALUE))            Lock.release()            time.sleep(0.5)class Consumer(threading.Thread):    def run(self):        global VALUE        while True:            m = random.randint(200,600)            Lock.acquire()            if VALUE >= m:                VALUE -= m                print('%s 生产了数字 %s ，当初数字大小为 %s ' %(threading.current_thread(),m,VALUE))            else:                print('数字 %s 太小' %VALUE)            Lock.release()            time.sleep(0.5)def main():    for x in range(3):        t = Consumer(name='消费者线程%d' %(x))        t.start()    for x in range(5):        t = Product(name='生产者线程%d' %(x))        t.start()if __name__ == '__main__':    main()