FastAPI Tutorial

1. FastAPI Introduction

What FastAPI is, installing it with Uvicorn, your first app, and the automatic /docs page.

2. FastAPI Path and Query Parameters

Type-hinted path parameters, optional query parameters, and adding validation constraints.

3. FastAPI Request Validation with Pydantic

Pydantic request models, automatic validation errors, field constraints, and response models.

4. FastAPI Dependency Injection and Async

The Depends() system for shared setup like DB sessions and auth, plus async def vs def.

5. FastAPI Authentication with OAuth2 and JWT

OAuth2PasswordBearer, issuing and validating JWTs, and a complete protected-route example.

6. Testing FastAPI Apps

TestClient, and a complete endpoint test using a mocked dependency via dependency_overrides.

7. FastAPI Production Deployment

Running Uvicorn workers or Gunicorn+Uvicorn workers in production, with a Dockerfile example.

8. FastAPI Interview Questions

Real FastAPI interview questions on framework comparisons, validation, DI, async, auth, and deployment.