这将引用 `app/` 的往上一级，带有其自己的 `__init __.py` 等文件的某个包。但是我们并没有这个包。因此，这将在我们的示例中引发错误。🚨

但是现在你知道了它的工作原理，因此无论它们多么复杂，你都可以在自己的应用程序中使用相对导入。🤓

### 添加一些自定义的 `tags`、`responses` 和 `dependencies`

我们不打算在每个*路径操作*中添加前缀 `/items` 或 `tags =["items"]`，因为我们将它们添加到了 `APIRouter` 中。

但是我们仍然可以添加*更多*将会应用于特定的*路径操作*的 `tags`，以及一些特定于该*路径操作*的额外 `responses`：

```Python hl_lines="30-31" title="app/routers/items.py"
{!../../docs_src/bigger_applications/app/routers/items.py!}

NOTE:

- `timeToFirstByte` and `timeToResponse` will be expressed in Nanoseconds.
- Additionally in the case of the erasure coded setup `tags.objectLocation` provides per object details about
  - Pool number the object operation was performed on.
  - Set number the object operation was performed on.
  - The list of drives participating in this operation belong to the set.

Committer -5 The Apache Software License, Version 2.0 http://www.apache.org/licenses/LICENSE-2.0.txt repo scm:svn:http://svn.apache.org/repos/asf/maven/components/tags/maven-2.0/maven-plugin-api scm:svn:https://svn.apache.org/repos/asf/maven/components/tags/maven-2.0/maven-plugin-api http://svn.apache.org/viewcvs.cgi/maven/components/tags/maven-2.0/maven-plugin-api Apache Software Foundation http://www.apache.org/ c:\home\Brett\cvs\maven-2\maven-components-release\maven-plugin-api\src\main\java src/main/scripts...

## Etiquetas de Documentación - OpenAPI { #documentation-tags-openapi }

Para agregar etiquetas a tus *path operations*, y agruparlas en la interfaz de usuario de la documentación, lee la documentación para [Tutorial - Configuraciones de Path Operation - Etiquetas](../tutorial/path-operation-configuration.md#tags){.internal-link target=_blank}.

    response = client.get(
        "/items/",
        headers=[
            ("save-data", "true"),
            ("if-modified-since", "yesterday"),
            ("traceparent", "123"),
            ("x-tag", "one"),
            ("x-tag", "two"),
        ],
    )
    assert response.status_code == 422
    assert response.json() == snapshot(
        {
            "detail": [
                {
                    "type": "missing",

			if !stringsHasPrefixFold(v.Name, "x-amz-meta") {
				meta["x-amz-meta-"+v.Name] = v.Value
				continue
			}
			meta[v.Name] = v.Value
		}
		if tags := rreq.OutputLocation.S3.Tagging.String(); tags != "" {
			meta[xhttp.AmzObjectTagging] = tags
		}
		if rreq.OutputLocation.S3.Encryption.EncryptionType != "" {
			meta[xhttp.AmzServerSideEncryption] = xhttp.AmzEncryptionAES
		}
		return ObjectOptions{

app = FastAPI()


class FilterParams(BaseModel):
    limit: int = Field(100, gt=0, le=100)
    offset: int = Field(0, ge=0)
    order_by: Literal["created_at", "updated_at"] = "created_at"
    tags: list[str] = []


@app.get("/items/")
async def read_items(filter_query: FilterParams = Query()):

class FilterParams(BaseModel):
    model_config = {"extra": "forbid"}

    limit: int = Field(100, gt=0, le=100)
    offset: int = Field(0, ge=0)
    order_by: Literal["created_at", "updated_at"] = "created_at"
    tags: list[str] = []


@app.get("/items/")
async def read_items(filter_query: FilterParams = Query()):

app = FastAPI(dependencies=[Depends(get_query_token)])


app.include_router(users.router)
app.include_router(items.router)
app.include_router(
    admin.router,
    prefix="/admin",
    tags=["admin"],
    dependencies=[Depends(get_token_header)],
    responses={418: {"description": "I'm a teapot"}},
)


@app.get("/")
async def root():

app = FastAPI()


class Image(BaseModel):
    url: HttpUrl
    name: str


class Item(BaseModel):
    name: str
    description: str | None = None
    price: float
    tax: float | None = None
    tags: set[str] = set()
    image: Image | None = None


@app.put("/items/{item_id}")
async def update_item(item_id: int, item: Item):
    results = {"item_id": item_id, "item": item}