Flask & Django are popular Python web frameworks used to build modern web applications.

Flask: A lightweight microframework ideal for quickly building APIs and small-to-medium apps. It offers simplicity, flexibility, and extensibility through plugins.

Django: A high-level framework that follows the “batteries-included” philosophy. It comes with built-in tools like ORM, admin panel, authentication, and strong security features, making it suitable for large-scale applications.

Key Features:

• Flask – minimal core, flexible routing, and Jinja2 templating.
• Django – full-stack framework with ORM, admin, and authentication.
• Both – open-source, secure, and supported by large communities.

Usage:

Flask: pip install flask → flask run → http://127.0.0.1:5000
Django: pip install django → django-admin startproject mysite → http://127.0.0.1:8000

Disclaimer: Flask & Django are open-source projects distributed under their respective licenses. Review the official documentation for setup, best practices, and deployment guidance. Use at your own risk.