Mastering Python Design Patterns: A guide to creating smart, efficient, and reusable software , Second Edition

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The Builder Pattern

In the previous chapter, we covered the first two creational patterns, the factory method and abstract factory, which both offer approaches to improve the way we create objects in nontrivial cases.

Now, imagine that we want to create an object that is composed of multiple parts and the composition needs to be done step by step. The object is not complete unless all its parts are fully created. That's where the builder design pattern can help us. The builder pattern separates the construction of a complex object from its representation. By keeping the construction separate from the representation, the same construction can be used to create several different representations (j.mp/builderpat).

A practical example can help us understand what the purpose of the builder pattern is. Suppose that we want to create an HTML page generator. The basic structure ...

Key benefits

Master the application design using the core design patterns and latest features of Python 3.7

Learn tricks to solve common design and architectural challenges

Choose the right plan to improve your programs and increase their productivity

Description

Python is an object-oriented scripting language that is used in a wide range of categories. In software engineering, a design pattern is an elected solution for solving software design problems. Although they have been around for a while, design patterns remain one of the top topics in software engineering, and are a ready source for software developers to solve the problems they face on a regular basis. This book takes you through a variety of design patterns and explains them with real-world examples. You will get to grips with low-level details and concepts that show you how to write Python code, without focusing on common solutions as enabled in Java and C++. You'll also fnd sections on corrections, best practices, system architecture, and its designing aspects. This book will help you learn the core concepts of design patterns and the way they can be used to resolve software design problems. You'll focus on most of the Gang of Four (GoF) design patterns, which are used to solve everyday problems, and take your skills to the next level with reactive and functional patterns that help you build resilient, scalable, and robust applications. By the end of the book, you'll be able to effciently address commonly faced problems and develop applications, and also be comfortable working on scalable and maintainable projects of any size.

What you will learn

Explore Factory Method and Abstract Factory for object creation

Clone objects using the Prototype pattern

Make incompatible interfaces compatible using the Adapter pattern

Secure an interface using the Proxy pattern

Choose an algorithm dynamically using the Strategy pattern

Keep the logic decoupled from the UI using the MVC pattern

Leverage the Observer pattern to understand reactive programming

Explore patterns for cloud-native, microservices, and serverless architectures

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Edward Nov 27, 2019

There's a few typos scattered throughout, but the catalog is excellent overall. It's well written and worth the cost.

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Gianguglielmo Calvi Oct 10, 2018

I am part of the generation of coders and designers that developed their core knowledge around three fundamental books:"The C++ Programming Language", "Modern C++ Design: Generic Programming and Design Patterns Applied", and "Design Patterns: Elements of Reusable Object-Oriented Software".The latter is mentioned in the very first paragraph of Mastering Python Design Patters and I can't deny that this sounded already a very positive beginning to me.I would define MPDP has a "necessary" book; it organizes important architectural design principles around python philosophy and instruct on how to get the best out of this powerful language.Its reading is smooth, accompanied by clear and well chosen examples, and by references to existing services that showcase important aspects of the techniques explained.All the most important design patterns are explored and even for those with a deep understanding of the subject will be pleasurable to discover how python is able to elegantly express them.The last sections with an overview of the Microservices and Design for the Cloud approaches, are a good bonus to see how everlasting techniques applies to contemporary scenarios.Last but not least, I have appreciated the <Other Books you may enjoy> section: it is always good to have trusted pointers to resources for extending our knowledge on a topic.MPDP is a book that I would suggest to anyone willing to raise the quality, scalability and robustness of its work with python: being a coder or a designer, you will benefit either way from the understanding of how patters interact and how complex architectures should be organized to work efficiently.

:D Aug 24, 2020

Especially helpful are1. Real-world examples and Use cases for the pattern.2. Discussion the Pythonic way of applying design patterns.

Aleemuddin Aug 22, 2019

Good

Amazon Customer Mar 13, 2020

When reading chapters like the abstract factory patterns, it seems that the authors haven't unterstood it themselves. Otherwise they could have explained why it is called abstract. The explanation e.g. is, that a normal factory is just a function and an abstract factory is the same in methods of classes. This is just wrong.All in all it doesn't make any sense to force every in Java developed Design Pattern on Python without discussion the specialty why it is even needen in Python and how the shown implementation differs from the original concept.Besides that there are too many sloppy, non pythonic idioms in the code, and many examples for how not to do it, for example using string formatting for SQL-Parameter.For a second edition of a book that is not acceptable.

Mastering Python Design Patterns: A guide to creating smart, efficient, and reusable software , Second Edition

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Mastering Python Design Patterns

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