🏢 ShopyApp

A Real-World Python E-Commerce Application

By reading and running code.py, you learn how Python is actually used at companies — not just syntax, but structure, design decisions, and professional patterns.

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📌 What is ShopyApp?

ShopyApp is a single-file Python application (code.py) that simulates how real companies build e-commerce backends — similar to Amazon, Flipkart, or Swiggy. Every Python concept is taught inside a working product with real features and real-world architecture used by professional developers.

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✨ Features

Feature	Real-World Parallel	Python Concepts Used
👤 User Auth	Flipkart / Swiggy login	Classes, hashing, regex
🛍️ Product Catalogue	Amazon search & filter	List comprehensions, sorting
🛒 Shopping Cart	Myntra / Meesho cart	Dataclasses, properties
📦 Order Management	Zomato order flow	Enums, UUID, validation
📊 Admin Dashboard	Internal ops dashboards	@admin_required decorator
📧 Notifications	SendGrid / Twilio alerts	Service layer pattern
🗄️ Database Layer	PostgreSQL-style ORM	SQL, context managers
🔐 Security	OWASP best practices	SHA-256 hashing, regex
📝 Logging	Production monitoring	logging module, file handlers
🌐 App Structure	Flask / Django internals	Sessions, service pattern

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🚀 Quick Start

Prerequisites

• Python 3.8 or higher
• No third-party libraries required — only the Python standard library!

Run the App

# Run the application
python code.py

# Two files will be created automatically:
#   shopflow.db   — SQLite database with all your data
#   shopflow.log  — Full audit trail of every event

Expected Output

When you run code.py, it walks through all 6 features sequentially:

• 📧 Email notifications printed to the console
• 📋 Product table with names, prices, stock, and ratings
• 🛒 Cart contents with subtotals and total
• 🎉 Order confirmation with a unique order ID
• 📊 Admin sales report with a terminal bar chart
• 🔐 Security test showing @admin_required blocking access

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🗂️ Project Structure

code.py is intentionally one file so you can read it top-to-bottom: