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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.

Related Terms

Comprehension
A concise syntax pattern for creating collections by transforming and filtering items from iterables.
Exception Handling
A mechanism for managing runtime errors using try, except, else, and finally blocks to prevent program crashes.
Logging Module
Python's built-in module for recording diagnostic information with configurable handlers, formatters, and log levels.
Dataclass
A decorator that automatically generates __init__, __repr__, __eq__, and other special methods for classes that mainly store data.
Pip Requirements File
A text file listing Python package dependencies with version specifications for reproducible project installations.
Magic Methods
Special double-underscore methods that define how Python objects behave with built-in operations and functions.
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