Final Inventory App – Bringing It All Together We’ve now built all the key features step by step: Custom Exceptions for clear error handling Search & Filter to quickly find items Sorting for meaningful data views Reports & Summaries for insights Persistence & Backup with JSON Iterators & Generators for efficient processing It’s time to combine everything into a single app . This will be a CLI-based inventory manager that demonstrates real-world Python practices. Project Structure items.py exceptions.py inventory.py storage.py main.py Example Run ✅ Why this matters We now have a feature-rich inventory app that’s modular, typed, and scalable. It demonstrates all major Python concepts (OOP, exceptions, iterators, persistence, sorting, filtering). This app can be extended into a real project (database, API, UI). 👉 With this, we’ve finished the Core Advanced Python section with a real-world project. Next, we move on to Modules, Imports, and Best Practices .