Observer Design Pattern Explained with Python Example | Low Level Design - Lesson 12

How do weather apps send live updates to millions of users at once? That's the Observer Design Pattern! In this video, I explain the Observer Pattern using a Weather Station example. I first show you the bad approach where everything is tightly coupled, and then refactor it into clean, scalable code using the Observer Pattern. 🔥 What you'll learn: ✅ What is Observer Design Pattern ✅ When and why to use it ✅ Weather Station example with bad approach vs clean approach ✅ Subject, Observer, and Notification flow explained ✅ How Observer Pattern is asked in LLD interviews 📚 This is part of my FREE Low Level Design (LLD) Course in Python. Subscribe for the full Design Patterns series! 👉 LLD Playlist:    • Low Level System Design in Python   👉 Enroll in this Course: https://codeanddebug.in/course/low-le... #UML #ClassDiagram #LowLevelDesign #LLD #SystemDesign #Placements #CodeAndDebug