Book Image

Modern Python Cookbook - Second Edition

By : Steven F. Lott
Book Image

Modern Python Cookbook - Second Edition

By: Steven F. Lott

Overview of this book

Python is the preferred choice of developers, engineers, data scientists, and hobbyists everywhere. It is a great language that can power your applications and provide great speed, safety, and scalability. It can be used for simple scripting or sophisticated web applications. By exposing Python as a series of simple recipes, this book gives you insight into specific language features in a particular context. Having a tangible context helps make the language or a given standard library feature easier to understand. This book comes with 133 recipes on the latest version of Python 3.8. The recipes will benefit everyone, from beginners just starting out with Python to experts. You'll not only learn Python programming concepts but also how to build complex applications. The recipes will touch upon all necessary Python concepts related to data structures, object oriented programming, functional programming, and statistical programming. You will get acquainted with the nuances of Python syntax and how to effectively take advantage of it. By the end of this Python book, you will be equipped with knowledge of testing, web services, configuration, and application integration tips and tricks. You will be armed with the knowledge of how to create applications with flexible logging, powerful configuration, command-line options, automated unit tests, and good documentation.
Table of Contents (18 chapters)
16
Other Books You May Enjoy
17
Index

Managing global and singleton objects

The Python environment contains a number of implicit global objects. These objects provide a convenient way to work with a collection of other objects. Because the collection is implicit, we're saved from the annoyance of explicit initialization code.

One example of this is an implicit random number generating object that's part of the random module. When we evaluate random.random(), we're actually making use of an instance of the random.Random class that's an implicit part of the random module.

Other examples of this include the following:

  • The collection of data encode/decode methods (codecs) available. The codecs module lists the available encoders and decoders. This also involves an implicit registry. We can add encodings and decodings to this registry.
  • The webbrowser module has a registry of known browsers. For the most part, the operating system default browser is the one preferred by the user...