Python Invoice Generator | Real-World Billing System with PDF Output | OOP + File Handling Project

In this video, I’ll show you how to build a complete *Invoice Generator and Billing System* in Python — fully console-based, professional, and perfect for small stores or mini-projects!

We’ll create a real-world project called **InvoicePro**, that helps store owners:
✅ Manage products
✅ Add items to invoices
✅ Calculate subtotal, tax, and total
✅ Save product catalogs
✅ Generate & print PDF invoices

🔧 *Concepts Covered:*
Object-Oriented Programming (OOP) in Python
File I/O (saving & loading product data using JSON)
ReportLab library for generating professional PDF invoices
Realistic store workflow implementation
Date/time formatting & structured receipt printing

💻 *Modules Used:*
`json`
`datetime`
`reportlab` (for PDF generation)
`os`

🧠 *Why You Should Build This:*
This project is a resume-worthy, portfolio-ready Python application that demonstrates your ability to handle *OOP, file management, and practical use cases* — the kind that impresses recruiters and clients alike.

📂 *Project Name:* InvoicePro
🧾 *Language:* Python
📸 *Output:* Professionally formatted PDF invoice

🚀 *Perfect For:*
Python beginners looking for real projects
College students preparing mini-projects
Developers learning OOP & file handling
Anyone who wants to make useful software!

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