To get the most out of this book

1. Use a machine with a recent version of Windows, Linux or MacOS.
2. Install Python 3.6. Also, it is useful to know about advanced syntax and new syntax introduced in the Python 3 releases. You might also want to learn about idiomatic Python programming, by checkout out resources on Internet about the topic, if needed.
3. Install and use Docker on your machine, to easily install and run the RabbitMQ server needed to run the microservices examples for Chapter 15, Microservices and Patterns for the Cloud. If you choose to use the Docker installation method, which is more and more needed for many server software and services packaged as containers, you will find useful information here https://hub.docker.com/_/rabbitmq/ as well as here https://docs.nameko.io/en/stable/installation.html.

Download the example code files

You can download the example code files for this book from your account at www.PacktPub.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 & Errata.
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/Mastering-Python-Design-Patterns-Second-Edition. In case there's an update to the code, it will be updated on the existing GitHub repository.

We also have other code bundles from our rich catalog of books and videos available at https://github.com/PacktPublishing/. Check them out!

Conventions used

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: "In the Musician class, the main action is performed by the play() method."

A block of code is set as follows:

class Musician:
     def __init__(self, name):
         self.name = name
  
     def __str__(self):
 return f'the musician {self.name}'
  
     def play(self):
         return 'plays music'

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: "A remote proxy, which acts as the local representation of an object that really exists in a different address space (for example, a network server)."

Warnings or important notes appear like this.

Tips and tricks appear like this.