Book Image

Python Parallel Programming Cookbook - Second Edition

By : Giancarlo Zaccone
Book Image

Python Parallel Programming Cookbook - Second Edition

By: Giancarlo Zaccone

Overview of this book

<p>Nowadays, it has become extremely important for programmers to understand the link between the software and the parallel nature of their hardware so that their programs run efficiently on computer architectures. Applications based on parallel programming are fast, robust, and easily scalable. </p><p> </p><p>This updated edition features cutting-edge techniques for building effective concurrent applications in Python 3.7. The book introduces parallel programming architectures and covers the fundamental recipes for thread-based and process-based parallelism. You'll learn about mutex, semaphores, locks, queues exploiting the threading, and multiprocessing modules, all of which are basic tools to build parallel applications. Recipes on MPI programming will help you to synchronize processes using the fundamental message passing techniques with mpi4py. Furthermore, you'll get to grips with asynchronous programming and how to use the power of the GPU with PyCUDA and PyOpenCL frameworks. Finally, you'll explore how to design distributed computing systems with Celery and architect Python apps on the cloud using PythonAnywhere, Docker, and serverless applications. </p><p> </p><p>By the end of this book, you will be confident in building concurrent and high-performing applications in Python.</p>
Table of Contents (16 chapters)
Title Page
Dedication

Using pipes to exchange objects

A pipe does the following:

  • It returns a pair of connection objects connected by a pipe.
  • Every connection object has to send/receive methods to communicate between processes.

Getting ready

The multiprocessing library allows you to implement a pipe data structure using the multiprocessing.Pipe (duplex) function. This returns a pair of objects, (conn1, conn2), which represent the end of the pipe.

The duplex parameter determines whether the pipe for the last case is bidirectional (that is, duplex = True), or unidirectional (that is, duplex = False). conn1 can only be used for receiving messages, and conn2 can only be used for sending messages. 

Now, let...