Book Image

Python: Master the Art of Design Patterns

Book Image

Python: Master the Art of Design Patterns

Overview of this book

Python is an object-oriented scripting language that is used in everything from data science to web development. Known for its simplicity, Python increases productivity and minimizes development time. Through applying essential software engineering design patterns to Python, Python code becomes even more efficient and reusable from project to project. This learning path takes you through every traditional and advanced design pattern best applied to Python code, building your skills in writing exceptional Python. Divided into three distinct modules, you’ll go from foundational to advanced concepts by following a series of practical tutorials. Start with the bedrock of Python programming – the object-oriented paradigm. Rethink the way you work with Python as you work through the Python data structures and object-oriented techniques essential to modern Python programming. Build your confidence as you learn Python syntax, and how to use OOP principles with Python tools such as Django and Kivy. In the second module, run through the most common and most useful design patterns from a Python perspective. Progress through Singleton patterns, Factory patterns, Façade patterns and more all with detailed hands-on guidance. Enhance your professional abilities in in software architecture, design, and development. In the final module, run through the more complex and less common design patterns, discovering how to apply them to Python coding with the help of real-world examples. Get to grips with the best practices of writing Python, as well as creating systems architecture and troubleshooting issues. This Learning Path combines some of the best that Packt has to offer in one complete, curated package. It includes content from the following Packt products: ? Python 3 Object-Oriented Programming - Second Edition by Dusty Phillips ? Learning Python Design Patterns - Second Edition by Chetan Giridhar ? Mastering Python Design Patterns by Sakis Kasampalis
Table of Contents (6 chapters)
4
A. Bibliography
5
Index

Chapter 6. The Observer Pattern – Keeping Objects in the Know

In the previous chapter, we started with a brief introduction to Proxy and went ahead to discuss the Proxy design pattern. We understood the concept of the Proxy pattern with a UML diagram and also learned how it's applied in the real world with the help of Python implementations. You learned about the ups and downs of the Proxy pattern with the FAQ section.

In this chapter, we will talk about the third type of design pattern—the behavioral design pattern. We will be introduced to the Observer design pattern, which falls under the hood of Behavioral patterns. We will discuss how the Observer design pattern is used in software application development. We will work with a sample use case and implement it in Python v3.5.

In this chapter, we will cover the following topics in brief:

  • An introduction to behavioral design patterns
  • The Observer pattern and its UML diagram
  • A real-world use case with the Python...