def write(q): print('Process to write: %s' % os.getpid()) for value in ['A', 'B', 'C']: print('Put %s to queue...' % value) q.put(value) time.sleep(random.random()) # 读数据进程执行的代码: def read(q): print('Process to read: %s' % os.getpid()) while True: value = q.get(True) print('Get %s from queue.' % value) if __name__=='__main__': # 父进程创建Queue,并传给各个子进程: q = Queue() pw = Process(target=write, args=(q,)) pr = Process(target=read, args=(q,)) # 启动子进程pw,写入: pw.start() # 启动子进程pr,读取: pr.start() # 等待pw结束: pw.join() # pr进程里是死循环,无法等待其结束,只能强行终止: pr.terminate()
返回结果:
Process to write: 8616 Put A to queue... Put B to queue... Put C to queue... [Finished in 2.6s]
你再试试用命令行执行这个文件
求问为啥在命令行里就可以显示出那个结果了?
同问
只有在if name =='main'成立,也就是命令行调用的时候下面的代码才会执行啊,前面的的课程有讲过的,建议回去看看复习一下。
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yang_sen
返回结果:
Process to write: 8616 Put A to queue... Put B to queue... Put C to queue... [Finished in 2.6s]