Flask Framework Guide

Applies to: Flask 3.0+, REST APIs, Microservices, Web Applications Language Guide: @.claude/skills/python-guide/SKILL.md

Overview

Flask is a lightweight WSGI web framework providing the basics for building web applications while allowing flexibility in choosing components.

Use Flask when:

• Building microservices or small-to-medium APIs
• You want flexibility to choose your own ORM, auth, etc.
• Rapid prototyping is needed
• You prefer explicit over implicit behavior

Consider alternatives when:

• You need async support (use FastAPI or Quart)
• You want batteries-included (use Django)
• High performance async is critical (use FastAPI)