Book Image

Python Unlocked

By : Arun Tigeraniya
Book Image

Python Unlocked

By: Arun Tigeraniya

Overview of this book

Python is a versatile programming language that can be used for a wide range of technical tasks—computation, statistics, data analysis, game development, and more. Though Python is easy to learn, it’s range of features means there are many aspects of it that even experienced Python developers don’t know about. Even if you’re confident with the basics, its logic and syntax, by digging deeper you can work much more effectively with Python – and get more from the language. Python Unlocked walks you through the most effective techniques and best practices for high performance Python programming - showing you how to make the most of the Python language. You’ll get to know objects and functions inside and out, and will learn how to use them to your advantage in your programming projects. You will also find out how to work with a range of design patterns including abstract factory, singleton, strategy pattern, all of which will help make programming with Python much more efficient. Finally, as the process of writing a program is never complete without testing it, you will learn to test threaded applications and run parallel tests. If you want the edge when it comes to Python, use this book to unlock the secrets of smarter Python programming.
Table of Contents (15 chapters)
Python Unlocked
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

Class inheritance


We already discussed how instances and classes are created. We also discussed how attributes are accessed in a class. Let's dive deeper into how this works for multiple base classes. As type is searched for the presence of an attribute for an instance, if the type inherits from a number of classes, they all are searched as well. There is a defined pattern to this (Method Resolution Order (MRO)). This order plays an important role in determining the method in cases of multiple inheritance and diamond-shaped inheritance.

Method resolution order

Key 4: Understanding MRO.

The methods are searched in the base classes of a class in predefined manner. This sequence or order is known as method resolution order. In Python 3, when an attribute is not found in a class, it is searched in all the base classes of that class. If the attribute is still not found, the base classes of the base classes are searched. This process goes on until we exhaust all base classes. This is similar to...