What is FastAPI?
FastAPI is a high-performance Python framework for building APIs. Built on Starlette and Pydantic, it auto-generates interactive API docs from type hints.
Pros & Cons
Pros
- ✓ Type-hint driven. Generates OpenAPI automatically.
- ✓ Excellent async performance.
Cons
- ✗ Less mature than Django for very large apps.
Alternatives to FastAPI
FAQ
FastAPI vs Flask?+−
FastAPI for new APIs — built-in async and OpenAPI. Flask for simpler use cases or legacy code.