Liskov Substitution Principle (LSP) is the most feared SOLID principle, but it doesn't have to be!
In this video, I explain LSP in the simplest way possible with real Python examples. If a parent class can do something, every child class should be able to do it too without breaking the code. That's it. But the real magic is in understanding WHERE developers mess this up.
🔥 What you'll learn:
✅ What is Liskov Substitution Principle
✅ The classic Rectangle/Square problem explained
✅ How LSP violations break your code silently
✅ Before and After Python code examples
✅ How to spot LSP questions in interviews
📚 This is part of my FREE Low Level Design (LLD) Course in Python. Each SOLID principle has its own video so you truly master them.
👉 LLD Playlist: https://www.youtube.com/playlist?list=PLhR2IpV1b2Fxgj9hd-SF2da_fGAn7iH-l
👉 Enroll in this Course: https://codeanddebug.in/course/low-level-system-design-in-python
Timestamps:
0:00 Introduction to Liskov Substitution Principle (LSP)
0:28 Bird & Penguin Example – Understanding LSP
2:28 LSP in Simple Terms
3:41 Bad Example – Bank Account Problem
5:45 Bad Example – Code Implementation
10:24 Good Example – Splitting Interfaces
13:02 Good Example – Code Implementation
18:31 Demonstrating LSP Compliance
19:12 Summary & Conclusion
#UML #ClassDiagram #LowLevelDesign #LLD #SystemDesign #Placements #CodeAndDebug
