raise ValueError('Invalid ID format, it must start with "isbn-" or "imdb-"')
    return id


@app.get("/items/")
async def read_items(
    id: Annotated[str | None, AfterValidator(check_valid_id)] = None,
):
    if id:
        item = data.get(id)
    else:
        id, item = random.choice(list(data.items()))

from pydantic_settings import BaseSettings


class LabelSettings(BaseModel):
    await_label: str | None = None
    number: int


default_config = {"approved-2": LabelSettings(await_label="awaiting-review", number=2)}


class Settings(BaseSettings):
    github_repository: str
    token: SecretStr
    debug: bool | None = False
    config: dict[str, LabelSettings] | Literal[""] = default_config


settings = Settings()

				href="#searchOptions" class="badge text-bg-primary text-decoration-none"
				data-bs-toggle="collapse"> <la:message
						key="labels.searchoptions_num" arg0="${f:h(num)}" />
			</a></li>
			<li class="list-inline-item"><la:message key="labels.searchoptions_menu_lang" /> <a
				href="#searchOptions" class="badge text-bg-primary text-decoration-none"
				data-bs-toggle="collapse"> <c:if test="${empty lang}">

				href="#searchOptions" class="badge text-bg-primary text-decoration-none"
				data-bs-toggle="collapse"> <la:message
						key="labels.searchoptions_num" arg0="${f:h(num)}" />
			</a></li>
			<li class="list-inline-item"><la:message key="labels.searchoptions_menu_lang" /> <a
				href="#searchOptions" class="badge text-bg-primary text-decoration-none"
				data-bs-toggle="collapse"> <c:if test="${empty lang}">

Your response model could have default values, like:

{* ../../docs_src/response_model/tutorial004_py310.py hl[9,11:12] *}

* `description: Union[str, None] = None` (or `str | None = None` in Python 3.10) has a default of `None`.
* `tax: float = 10.5` has a default of `10.5`.
* `tags: List[str] = []` has a default of an empty list: `[]`.

Seu modelo de resposta pode ter valores padrão, como:

{* ../../docs_src/response_model/tutorial004_py310.py hl[9,11:12] *}

* `description: Union[str, None] = None` (ou `str | None = None` no Python 3.10) tem um padrão de `None`.
* `tax: float = 10.5` tem um padrão de `10.5`.
* `tags: List[str] = []` tem um padrão de uma lista vazia: `[]`.

            "axisLabel": "",
            "axisPlacement": "auto",
            "barAlignment": 0,
            "drawStyle": "line",
            "fillOpacity": 10,
            "gradientMode": "none",
            "hideFrom": {
              "legend": false,
              "tooltip": false,
              "viz": false
            },
            "insertNulls": false,
            "lineInterpolation": "linear",

    # python3.14: Use forward reference without "from __future__ import annotations"
    async def get_current_user() -> DummyUser | None:
        return None

    app = FastAPI()

    client = TestClient(app)

    @app.get("/")
    async def get(
        current_user: Annotated[DummyUser | None, Depends(get_current_user)],
    ) -> str:
        return "hello world"

    response = client.get("/")

items = {"foo": {"name": "Fighters", "size": 6}, "bar": {"name": "Tenders", "size": 3}}


@app.put("/items/{item_id}")
async def upsert_item(
    item_id: str,
    name: Annotated[str | None, Body()] = None,
    size: Annotated[int | None, Body()] = None,
):
    if item_id in items:
        item = items[item_id]
        item["name"] = name
        item["size"] = size
        return item
    else:

class User(BaseModel):
    username: str


def get_current_user(oauth_header: str | None = Security(oid)):
    if oauth_header is None:
        return None
    user = User(username=oauth_header)
    return user


@app.get("/users/me")
def read_current_user(current_user: User | None = Depends(get_current_user)):
    if current_user is None:
        return {"msg": "Create an account first"}
    return current_user