Book Image

Python Parallel Programming Cookbook

By : Giancarlo Zaccone
Book Image

Python Parallel Programming Cookbook

By: Giancarlo Zaccone

Overview of this book

This book will teach you parallel programming techniques using examples in Python and will help you explore the many ways in which you can write code that allows more than one process to happen at once. Starting with introducing you to the world of parallel computing, it moves on to cover the fundamentals in Python. This is followed by exploring the thread-based parallelism model using the Python threading module by synchronizing threads and using locks, mutex, semaphores queues, GIL, and the thread pool. Next you will be taught about process-based parallelism where you will synchronize processes using message passing along with learning about the performance of MPI Python Modules. You will then go on to learn the asynchronous parallel programming model using the Python asyncio module along with handling exceptions. Moving on, you will discover distributed computing with Python, and learn how to install a broker, use Celery Python Module, and create a worker. You will understand anche Pycsp, the Scoop framework, and disk modules in Python. Further on, you will learnGPU programming withPython using the PyCUDA module along with evaluating performance limitations.
Table of Contents (13 chapters)
Python Parallel Programming Cookbook
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

Communicating sequential processes with PyCSP


PyCSP is a Python module based on communicating sequential processes, which is a programming paradigm developed to build concurrent programs via message passing. The PyCSP module is characterized by:

  • The exchange of messages between processes

  • The possibility of using a thread to use shared memory

  • The exchange of messages is done through channels

The channels allow:

  • An exchange of values between processes

  • The synchronization of processes

PyCSP allows the use of different channel types: One2One, One2Any, Any2One, and Any2One. These names indicate the number of writers and readers that can communicate over the channel.

Getting ready

PyCSP can be installed using the pip installer via the following command:

pip install python-csp

Also, it is possible to download the entire distribution from GitHub (https://github.com/futurecore/python-csp).

Download it and then type the following from the installation directory:

python setup.py install

For our examples, we...