请问如下代码处两个注释的地方如何写啊

Question

class ModelThread():

    def __init__(self):
        self.newrun1 = threading.Thread(target=self.target1)
        self.newrun2 = threading.Thread(target=self.target2)
        self.event = threading.Event()

    def run(self):
        self.newrun1.start()
        self.newrun2.start()
        self.newrun1.join()
        self.newrun2.join()

    def target1(self):
        while True:
            for i in range(1,9999999):
                print(i, end=' ')
                time.sleep(1)

    def target2(self):
        while True:
            for i in ['A','B','C','D','E','F','G','H','I']:
                self.event.set()
                if i == 'D':
                    pass #阻塞(挂起)target1
                print(i, end=' ')
                time.sleep(1)
                if i=='I':
                    pass #解除阻塞(挂起)
if __name__ == '__main__':
    a = ModelThread()
    a.run()

最近学习python中,遇到一个多线程问题,有没有学霸提供思路呢?

Answer 1

线程不可以从外部挂起
你非要这么搞，那只能在target1里加个while循环，循环变量用全局变量，然后当target2将它设置成1的时候，target1就陷入死循环了（记得死循环了要写sleep否则cpu会爆）