docs_src/custom_response/tutorial010_py310.py

from fastapi import FastAPI
from fastapi.responses import HTMLResponse

app = FastAPI(default_response_class=HTMLResponse)


@app.get("/items/")
async def read_items():
    return "<h1>Items</h1><p>This is a list of items.</p>"
📝 Update source examples and docs from Python 3.9 to 3.10 (#14900) 2026-02-12 05:19:43 -08:00			`from fastapi import FastAPI`
✨ Serialize JSON response with Pydantic (in Rust), when there's a Pydantic return type or response model (#14962) 2026-02-22 08:07:19 -08:00			`from fastapi.responses import HTMLResponse`
📝 Update source examples and docs from Python 3.9 to 3.10 (#14900) 2026-02-12 05:19:43 -08:00
✨ Serialize JSON response with Pydantic (in Rust), when there's a Pydantic return type or response model (#14962) 2026-02-22 08:07:19 -08:00			`app = FastAPI(default_response_class=HTMLResponse)`
📝 Update source examples and docs from Python 3.9 to 3.10 (#14900) 2026-02-12 05:19:43 -08:00

			`@app.get("/items/")`
			`async def read_items():`
✨ Serialize JSON response with Pydantic (in Rust), when there's a Pydantic return type or response model (#14962) 2026-02-22 08:07:19 -08:00			`return "<h1>Items</h1><p>This is a list of items.</p>"`