Response Model Example - Fastapi Typing CST Test
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Response Model Example — Fastapi Code
Use Pydantic models to control response data.
from fastapi import FastAPI
from pydantic import BaseModel
app = FastAPI()
class UserOut(BaseModel):
username: str
@app.get('/user/{user_id}', response_model=UserOut)
async def get_user(user_id: int):
return { 'username': f'user{user_id}', 'password': 'secret' }Fastapi Language Guide
FastAPI is a modern, high-performance Python web framework for building APIs with automatic interactive documentation. It emphasizes speed, type hints, and ease of development, leveraging Python 3.7+ features.
Primary Use Cases
- ▸Building RESTful and JSON APIs
- ▸High-performance asynchronous backend
- ▸Microservices architecture
- ▸Data validation and processing APIs
- ▸Integrating with frontend frameworks or machine learning models
Notable Features
- ▸Automatic validation with Pydantic models
- ▸Asynchronous support with async/await
- ▸Interactive API documentation with Swagger UI/ReDoc
- ▸Dependency injection system for modular code
- ▸High performance close to Node.js frameworks
Origin & Creator
FastAPI was created by Sebastián Ramírez in 2018 to provide a fast and developer-friendly Python API framework.
Industrial Note
FastAPI is ideal for projects requiring high-performance async APIs, automatic data validation, and rapid development cycles in Python.