multiprocessing.Pipe()的用法

multiprocessing.Pipe()用来创建管道，返回两个连接对象，代表管道的两端，一般用于进程或者线程之间的通信，不同于os.pipe(),os.pipe()主要用来创建两个文件描述符，一个读，一个写，是单向的。而multiprocessing.Pipe()则可以双向通信。

from multiprocessing import Process, Pipedef send(pipe):    pipe.send(['spam'] + [42, 'egg'])    pipe.close()def talk(pipe):    pipe.send(dict(name = 'Bob', spam = 42))    reply = pipe.recv()    print('talker got:', reply)if __name__ == '__main__':    (con1, con2) = Pipe()    sender = Process(target = send, name = 'send', args = (con1, ))    sender.start()    child = Process(target = talk, name = 'talk', args = (con2,))    child.start()
)

结果：
('talker got:', ['spam', 42, 'egg'])