As we saw in the previous chapter, Behavioral patterns focus on the responsibilities that an object has. It deals with the interaction among objects to achieve larger functionality. The Template Method pattern is a behavioral design pattern that defines the program skeleton or an algorithm in a method called the Template Method. For example, you could define the steps to prepare a beverage as an algorithm in a Template Method. The Template Method pattern also helps redefine or customize certain steps of the algorithm by deferring the implementation of some of these steps to subclasses. This means that the subclasses can redefine their own behavior. For example, in this case, subclasses can implement steps to prepare tea using the Template Method to prepare a beverage. It is important to note that the change in the steps (as done by the subclasses) don't impact the original algorithm's structure. Thus, the facility of overriding by subclasses in the Template...
Learning Python Design Patterns - Second Edition - Second Edition
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Learning Python Design Patterns - Second Edition - Second Edition
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Overview of this book
With the increasing focus on optimized software architecture and design it is important that software architects think about optimizations in object creation, code structure, and interaction between objects at the architecture or design level. This makes sure that the cost of software maintenance is low and code can be easily reused or is adaptable to change. The key to this is reusability and low maintenance in design patterns.
Building on the success of the previous edition, Learning Python Design Patterns, Second Edition will help you implement real-world scenarios with Python’s latest release, Python v3.5.
We start by introducing design patterns from the Python perspective. As you progress through the book, you will learn about Singleton patterns, Factory patterns, and Façade patterns in detail. After this, we’ll look at how to control object access with proxy patterns. It also covers observer patterns, command patterns, and compound patterns.
By the end of the book, you will have enhanced your professional abilities in software architecture, design, and development.
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Learning Python Design Patterns - Second Edition - Second Edition
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Table of Contents (19 chapters)
Learning Python Design Patterns Second Edition
Credits
Foreword
About the Author
About the Reviewer
www.PacktPub.com
Preface
Free Chapter
Introduction to Design Patterns
The Singleton Design Pattern
The Factory Pattern – Building Factories to Create Objects
The Façade Pattern – Being Adaptive with Façade
The Proxy Pattern – Controlling Object Access
The Observer Pattern – Keeping Objects in the Know
The Command Pattern – Encapsulating Invocation
The Template Method Pattern – Encapsulating Algorithm
Model-View-Controller – Compound Patterns
The State Design Pattern
AntiPatterns
Index
Customer Reviews