23.python-爬虫的基础认知，Condition锁机制，小例子

本文链接：https://blog.csdn.net/Programmer_huangtao/article/details/88542510

Condition锁机制
#-------------------------------------------------------------------------
import threading
import time
import random
gMoney = 1000
gTimesT = 10
gTimes = 0
gCondition= threading.Condition()
class Producer(threading.Thread):
    def run(self):
        global gMoney
        global gTimesT
        global gTimes
        while True:
            money = random.randint(100,1000)
            gCondition.acquire()
            if gTimes >= gTimesT:
                gCondition.release()
                break
            gMoney += money
            print('%s生产了%d元钱，剩余%d元钱'%(threading.current_thread(),money,gMoney))
            gTimes +=1
            gCondition.notify_all()
            gCondition.release()
            time.sleep(0.5)

class Consumer(threading.Thread):
    def run(self):
        global gMoney
        global gTimesT
        global gTimes
        while True:
            money = random.randint(100,1000)
            gCondition.acquire()
            while gMoney <= money:
                if gMoney >= money:
                    gCondition.release()
                    return
                print('%s消费者消费%d元钱，剩余%d元钱，不足！'% (threading.current_thread(),money,gMoney))
                gCondition.wait()
            gMoney -= money
            print('%s消费了%d元钱，剩余%d元钱'%(threading.current_thread(),money,gMoney))

            gCondition.release()
            time.sleep(0.5)
def main():
    for x in range(3):
        t = Consumer(name='消费者%d'%x)
        t.start()
    for x in range(5):
        t = Producer(name='生产者%d'%x)
        t.start()
if __name__ =="__main__":
    main()