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Mastering Python Design Patterns

By : Sakis Kasampalis

3.6 (5)

Mastering Python Design Patterns

3.6 (5)

By: Sakis Kasampalis

Overview of this book

This book is for Python programmers with an intermediate background and an interest in design patterns implemented in idiomatic Python. Programmers of other languages who are interested in Python can also benefit from this book, but it would be better if they first read some introductory materials that explain how things are done in Python.

Preface

Design patterns

Common misunderstandings about design patterns

Design patterns and Python

What this book covers

What you need for this book

Who this book is for

Conventions

Reader feedback

Customer support

Free Chapter

1. The Factory Pattern

1. The Factory Pattern

Factory Method

Abstract Factory

Summary

2. The Builder Pattern

2. The Builder Pattern

A real-life example

A software example

Use cases

Implementation

Summary

3. The Prototype Pattern

3. The Prototype Pattern

A real-life example

A software example

Use cases

Implementation

Summary

4. The Adapter Pattern

4. The Adapter Pattern

A real-life example

A software example

Use cases

Implementation

Summary

5. The Decorator Pattern

5. The Decorator Pattern

A real-life example

A software example

Use cases

Implementation

Summary

6. The Facade Pattern

6. The Facade Pattern

A real-life example

A software example

Use cases

Implementation

Summary

7. The Flyweight Pattern

7. The Flyweight Pattern

A real-life example

A software example

Use cases

Implementation

Summary

8. The Model-View-Controller Pattern

8. The Model-View-Controller Pattern

A real-life example

A software example

Use cases

Implementation

Summary

9. The Proxy Pattern

9. The Proxy Pattern

A real-life example

A software example

Use cases

Implementation

Summary

10. The Chain of Responsibility Pattern

10. The Chain of Responsibility Pattern

A real-life example

A software example

Use cases

Implementation

Summary

11. The Command Pattern

11. The Command Pattern

A real-life example

A software example

Use cases

Implementation

Summary

12. The Interpreter Pattern

12. The Interpreter Pattern

A real-life example

A software example

Use cases

Implementation

Summary

13. The Observer Pattern

13. The Observer Pattern

A real-life example

A software example

Use cases

Implementation

Summary

14. The State Pattern

14. The State Pattern

A real-life example

A software example

Use cases

Implementation

Summary

15. The Strategy Pattern

15. The Strategy Pattern

A real-life example

A software example

Use cases

Implementation

Summary

16. The Template Pattern

16. The Template Pattern

A real-life example

A software example

Use cases

Implementation

Summary

Index

Index

Implementation

In this section, we will implement a banner generator. The idea is rather simple. We want to send some text to a function, and the function should generate a banner containing the text. Banners have some sort of style, for example, dots or dashes surrounding the text. The banner generator has a default style, but we should be able to provide our own style.

The function generate_banner() is our Template function. It accepts, as an input, the text (msg) that we want our banner to contain, and optionally the style (style) that we want to use. The default style is dots_style, which we will see in a moment. The generate_banner() function wraps the styled text with a simple header and footer. In reality, the header and footer can be much more complex, but nothing forbids us from calling functions that can do the header and footer generations instead of just printing simple strings:

def generate_banner(msg, style=dots_style):
    print('-- start of banner --')
    print...

CONTINUE READING

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Tech Concepts

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Programming languages

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