PYTHON APPLIED
FastAPI and REST APIs
FastAPI is a modern Python framework built on type hints. It generates interactive API documentation automatically, validates request data using Pydantic models, and supports async handlers natively.
How it reads
@app.get and @app.post map HTTP methods to handler functions
BaseModel validates incoming JSON against the type hints automatically
async def lets FastAPI handle concurrent requests efficiently
Cloud tip: Visit /docs on a running FastAPI server to see auto-generated Swagger UI documentation for every endpoint.
Check your understanding
Answer all 3 to complete this lesson · +15 XP
1. What library does FastAPI use for request data validation?
2. What URL path shows auto-generated API documentation on a FastAPI server?
3. What advantage does 'async def' provide in FastAPI handlers?