The Strategy Pattern: Write BETTER PYTHON CODE Part 3
💡 Learn how to design great software in 7 steps: https://arjan.codes/designguide.
The strategy pattern is a widely used design pattern that help you write better Python code. I'll show you how to apply the strategy using a practical example written in Python. I'll cover both the classic object-oriented version of the pattern, and I'll also show you a functional version that's a bit shorter to write and works equally well. At the end of the video, there's a more advanced bit where you'll see how to add type hints for functions as parameters.
All parts in this series:
Part 1: Cohesion and coupling - • Cohesion and Coupling: Write BETTER P...
Part 2: Dependency inversion - • Dependency Inversion: Write BETTER PY...
Part 3: The strategy pattern - • The Strategy Pattern: Write BETTER PY...
Part 4: The observer pattern - • Observer Pattern Tutorial: I NEVER Kn...
Part 5: Unit testing and code coverage - • 100% CODE COVERAGE - Think You're Don...
Part 6: Template method and bridge - • Two UNDERRATED Design Patterns 💡 Writ...
Part 7: Exception handling - • Exception Handling Tips in Python ⚠ W...
Part 7b: Monadic error handling - • Monadic Error Handling in Python ⚠ Wr...
Part 8: Software architecture - • Why You Should Think About SOFTWARE A...
Part 9: SOLID principles - • Uncle Bob’s SOLID Principles Made Eas...
Part 10: Object creation patterns - • QUESTIONABLE Object Creation Patterns...
Relevant books:
Design Patterns: Elements of Reusable Object-Oriented Software by Erich Gamma, Richard Helm, Ralph Johnson, and John Vlissides: https://amzn.to/3jllgyH
Principles of Package Design: Creating Reusable Software Components by Matthias Noback: https://amzn.to/2NETK3l
Clean Code: A Handbook of Agile Software Craftsmanship by Robert Martin: https://amzn.to/3qVZgNs
The original Design Principles and Design Patterns article by Robert Martin: https://fi.ort.edu.uy/innovaportal/fi...
🎓 Courses:
The Software Designer Mindset: https://www.arjancodes.com/mindset
The Software Designer Mindset Team Packages: https://www.arjancodes.com/sas
The Software Architect Mindset: Pre-register now! https://www.arjancodes.com/architect
Next Level Python: Become a Python Expert: https://www.arjancodes.com/next-level...
The 30-Day Design Challenge: https://www.arjancodes.com/30ddc
🛒 GEAR & RECOMMENDED BOOKS: https://kit.co/arjancodes.
You can find the code I worked on in this episode in my GitHub repository: https://github.com/arjancodes/betterp...
Chapters:
0:00 Intro
1:30 Code example
3:21 Main problem with the code
4:01 Switching to a strategy pattern
5:23 Creating concrete strategies
6:56 Updating the process_tickets method
10:09 Adding a new strategy
11:03 A functional version of the strategy
13:18 Adding a function type hint
14:49 Outro
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