Performing a basic IPC using connected sockets (socketpair)

Sometimes, two scripts need to communicate some information between themselves via two processes. In Unix/Linux, there's a concept of connected socket, of socketpair. We can experiment with this here.

Getting ready

This recipe is designed for a Unix/Linux host. Windows/macOS is not suitable for running this one.

How to do it...

We use a test_socketpair() function to wrap a few lines that test the socket's socketpair() function.

List 3.8 shows an example of socketpair, as follows:

#!/usr/bin/env python 
# Python Network Programming Cookbook, Second Edition -- Chapter - 3 
# This program is optimized for Python 3.5.2. 
# It may run on any other version with/without modifications. 
# To make it run on Python 2.7.x, needs some changes due to API differences. 
# Follow the comments inline to make the program work with Python 2. 
 
import socket 
import os 
 
BUFSIZE = 1024 
 
def test_socketpair(): 
    """ Test Unix socketpair""" 
    parent...