Python Beginner

What is Flask?

A lightweight web framework for Python that provides essentials for building web applications without imposing structure.

Flask is a micro-framework — it provides URL routing, request handling, templates (Jinja2), and development server, but leaves choices like database, forms, and authentication to the developer.

A basic Flask app is just a few lines: create an app, define routes with @app.route(), and return responses. Extensions add functionality: Flask-SQLAlchemy (ORM), Flask-Login (auth), Flask-WTF (forms). Flask is ideal for APIs, prototypes, and applications where you want full control.

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