{"url": "https://prod.example.com", "description": "Production environment"},
    ],
    root_path="/api/v1",
    root_path_in_servers=False,
)


@app.get("/app")
def read_main(request: Request):

# Retornando uma Resposta Diretamente { #return-a-response-directly }

Quando você cria uma *operação de rota* no **FastAPI**, normalmente você pode retornar qualquer dado: um `dict`, uma `list`, um modelo do Pydantic, um modelo do banco de dados, etc.

Se você declarar um [Modelo de resposta](../tutorial/response-model.md), o FastAPI irá usá-lo para serializar os dados para JSON, usando o Pydantic.

///

## Стриминг JSON Lines с FastAPI { #stream-json-lines-with-fastapi }

Чтобы стримить JSON Lines с FastAPI, вместо использования `return` в вашей *функции-обработчике пути* используйте `yield`, чтобы по очереди выдавать каждый элемент.

{* ../../docs_src/stream_json_lines/tutorial001_py310.py ln[1:24] hl[24] *}

///

## Стрімінг JSON Lines з FastAPI { #stream-json-lines-with-fastapi }

Щоб стрімити JSON Lines з FastAPI, замість використання `return` у вашій *функції операції шляху* використовуйте `yield`, щоб по черзі створювати кожен елемент.

{* ../../docs_src/stream_json_lines/tutorial001_py310.py ln[1:24] hl[24] *}

@app.get("/items/")
async def read_items(q: str = Query(default="fixedquery", min_length=3)):
    results = {"items": [{"item_id": "Foo"}, {"item_id": "Bar"}]}
    if q:
        results.update({"q": q})

class ItemV2(BaseModelV2):
    name: str
    description: str | None = None
    size: float


app = FastAPI()


@app.post("/items/", response_model=ItemV2)
async def create_item(item: Item):

        {"url": "https://prod.example.com", "description": "Production environment"},
    ],
    root_path="/api/v1",
)


@app.get("/app")
def read_main(request: Request):

from functools import partial

from fastapi import FastAPI
from fastapi.testclient import TestClient


def main(some_arg, q: str | None = None):
    return {"some_arg": some_arg, "q": q}


endpoint = partial(main, "foo")

app = FastAPI()

app.get("/")(endpoint)


client = TestClient(app)


def test_partial():
    response = client.get("/?q=bar")
    data = response.json()

    return {"fresh_value": fresh_value}
```

////

//// tab | Python 3.10+ non annoté

/// tip | Astuce

Privilégiez la version `Annotated` si possible.

///

```Python hl_lines="1"
async def needy_dependency(fresh_value: str = Depends(get_value, use_cache=False)):
    return {"fresh_value": fresh_value}
```

////

    return {"fresh_value": fresh_value}
```

////

//// tab | Python 3.10+ non-Annotated

/// tip | Dica

Utilize a versão com `Annotated` se possível.

///

```Python hl_lines="1"
async def needy_dependency(fresh_value: str = Depends(get_value, use_cache=False)):
    return {"fresh_value": fresh_value}
```

////