This book is self-contained: the only fundamental requirement before starting to read is a passion for programming and a curiosity for the topics covered in the book.

You can download the example code files for this book from your account at www.packt.com. If you purchased this book elsewhere, you can visit www.packtpub.com/support and register to have the files emailed directly to you.

You can download the code files by following these steps:

1. Log in or register at www.packtpub.com.
2. Select the Support tab.
3. Click on Code Downloads.
4. Enter the name of the book in the Search box and follow the onscreen instructions.

Once the file is downloaded, please make sure that you unzip or extract the folder using the latest version of:

• WinRAR/7-Zip for Windows
• Zipeg/iZip/UnRarX for Mac
• 7-Zip/PeaZip for Linux

The code bundle for the book is also hosted on GitHub at https://github.com/PacktPublishing/Python-Parallel-Programming-Cookbook-Second-Edition. We also have other code bundles from our rich catalog of books and videos available at https://github.com/PacktPublishing/. Check them out!

We also provide a PDF file that has color images of the screenshots/diagrams used in this book. You can download it here: https://static.packt-cdn.com/downloads/9781789533736_ColorImages.pdf.

There are a number of text conventions used throughout this book.

CodeInText: Indicates code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles. Here is an example: "It's possible to kill a process immediately by using the terminate method."

A block of code is set as follows:

import socket
port=60000
s =socket.socket()
host=socket.gethostname()

When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:

 p = multiprocessing.Process(target=foo)
 print ('Process before execution:', p, p.is_alive())
 p.start()

Any command-line input or output is written as follows:

> python server.py

Bold: Indicates a new term, an important word, or words that you see onscreen. For example, words in menus or dialog boxes appear in the text like this. Here is an example: "Go to System Properties | Environment Variables | User or System variables | New."