Python Polymorphism & Dunder Methods: Complete the Coin Project | Python Tutorial #29 скачать в хорошем качестве

Python Polymorphism & Dunder Methods: Complete the Coin Project | Python Tutorial #29

In this final part of our Coin System project, we master the fourth and final pillar of Object-Oriented Programming: Polymorphism! You’ll learn how to "override" parent methods so that different objects behave differently—even when they share the same parent. For example, why does a 1p coin rust while a 5p coin stays clean? We solve that with polymorphic methods. Plus, we’ll use the `__str__` dunder method to make our objects printable and create a professional-grade data table using argument unpacking. 📌 Timestamps: 0:00:00 Introduction: Completing the Coin Project 0:01:00 Creating the Bronze Coins (1p and 2p Classes) 0:02:50 What is Polymorphism? (Multiple Forms, One Method Name) 0:03:30 Overriding Methods: Making Silver coins "rust-proof" 0:05:20 Expanding the system: 10p, 20p, and 50p Classes 0:06:55 Finishing with the £1 and £2 Coins 0:08:25 Creating a List of Coin Objects 0:09:40 Formatting a professional Data Table in the Console 0:10:50 Unpacking Arguments for clean String Formatting 0:12:00 Introducing the _str_ Dunder Method for human-readable output 0:14:30 Final Demo: Printing the complete set of UK currency 0:16:15 Summary & Preview: Next up, the Bank Account Project! This is Episode #29 of the Complete Python 2026 series. If you've made it this far, you now understand the four pillars of OOP: Abstraction, Encapsulation, Inheritance, and Polymorphism. ➡️ Watch the Full Python Playlist: [   • Complete Python Course for Beginners  ] 🔔 Subscribe for more Ex-Microsoft Engineer coding tutorials! #Python #PythonOOP #Polymorphism #DunderMethods #MethodOverriding #Python2026 #ObjectOrientedProgramming #LearnToCode #FreePlacementCourse #ExMicrosoft #CodingProject