multiprocessing.Pipe([duplex])
返回2个连接对象(conn1, conn2),代表管道的两端,默认是双向通信.如果duplex=False,conn1只能用来接收消息,conn2只能用来发送消息.不同于os.open之处在于os.pipe()返回2个文件描述符(r, w),表示可读的和可写的

实例如下:

复制代码 代码如下:

!/usr/bin/python

coding=utf-8

import os
from multiprocessing import Process, Pipe

def 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()
print "con2 got: %s" % con2.recv()#从send收到消息
con2.close()

(parentEnd, childEnd) = Pipe()  
child = Process(target = talk, name = 'talk', args = (childEnd,))  
child.start()  
print('parent got:', parentEnd.recv())  
parentEnd.send({x * 2 for x in 'spam'})  
child.join()  
print('parent exit')