```Python hl_lines="7"
{!../../docs_src/query_params_str_validations/tutorial006b.py!}
```

/// info

如果你之前没见过 `...` 这种用法：它是一个特殊的单独值，它是 <a href="https://docs.python.org/3/library/constants.html#Ellipsis" class="external-link" target="_blank">Python 的一部分并且被称为「省略号」</a>。
Pydantic 和 FastAPI 使用它来显式的声明需要一个值。

///

这将使 **FastAPI** 知道此查询参数是必需的。

### 使用`None`声明必需参数

pullPolicy: IfNotPresent ## minio mode, i.e. standalone or distributed or gateway (nas) ## Distributed MinIO ref: https://docs.minio.io/docs/distributed-minio-quickstart-guide ## NAS Gateway MinIO ref: https://docs.min.io/docs/minio-gateway-for-nas.html mode: distributed ## NOTE: currently only "nas" gateway is supported. ## Additional labels to include with deployment or statefulset additionalLabels: [] ## Additional annotations to include with deployment or statefulset additionalAnnotation: [] ##...

pullPolicy: IfNotPresent ## minio mode, i.e. standalone or distributed or gateway (nas) ## Distributed MinIO ref: https://docs.minio.io/docs/distributed-minio-quickstart-guide ## NAS Gateway MinIO ref: https://docs.min.io/docs/minio-gateway-for-nas.html mode: distributed ## NOTE: currently only "nas" gateway is supported. ## Additional labels to include with deployment or statefulset additionalLabels: [] ## Additional annotations to include with deployment or statefulset additionalAnnotation: [] ##...

pullPolicy: IfNotPresent ## minio mode, i.e. standalone or distributed or gateway (nas) ## Distributed MinIO ref: https://docs.minio.io/docs/distributed-minio-quickstart-guide ## NAS Gateway MinIO ref: https://docs.min.io/docs/minio-gateway-for-nas.html mode: distributed ## NOTE: currently only "nas" gateway is supported. ## Additional labels to include with deployment or statefulset additionalLabels: [] ## Additional annotations to include with deployment or statefulset additionalAnnotation: [] ##...

labels.facet_contentLength_250kto500k=250KB - 500KB
labels.facet_contentLength_1mto5m=1MB - 5MB
labels.facet_contentLength_5m=5MB -  
labels.facet_filetype_title=ファイルの種類
labels.facet_filetype_html=HTML
labels.facet_filetype_word=MS Word
labels.facet_filetype_excel=MS Excel
labels.facet_filetype_powerpoint=MS PowerPoint
labels.facet_filetype_odt=ODF Word
labels.facet_filetype_ods=ODF Spreadsheet

install ## users: ## Username, password and policy to be assigned to the user ## Default policies are [readonly|readwrite|writeonly|consoleAdmin|diagnostics] ## Add new policies as explained here https://docs.min.io/docs/minio-multi-user-quickstart-guide.html ## NOTE: this will fail if LDAP is enabled in your MinIO deployment ## make sure to disable this if you are using LDAP. - accessKey: console secretKey: console123 policy: consoleAdmin ## Additional Annotations for the Kubernetes Job makeUserJob makeUserJob:...

You can read more about it in the <a href="https://pyjwt.readthedocs.io/en/latest/installation.html" class="external-link" target="_blank">PyJWT Installation docs</a>.

///

## Password hashing

`@lru_cache` is part of `functools` which is part of Python's standard library, you can read more about it in the <a href="https://docs.python.org/3/library/functools.html#functools.lru_cache" class="external-link" target="_blank">Python docs for `@lru_cache`</a>.

## Recap

 * directives. It even offers convenient constants [CacheControl.FORCE_NETWORK] and
 * [CacheControl.FORCE_CACHE] that address the use cases above.
 *
 * [rfc_7234]: http://tools.ietf.org/html/rfc7234
 */
class Cache internal constructor(
  directory: Path,
  maxSize: Long,
  fileSystem: FileSystem,
  taskRunner: TaskRunner,
) : Closeable, Flushable {

そして、固定値のクラス属性を作ります。すると、その値が使用可能な値となります:

```Python hl_lines="1 6 7 8 9"
{!../../docs_src/path_params/tutorial005.py!}
```

/// info | "情報"

<a href="https://docs.python.org/3/library/enum.html" class="external-link" target="_blank">Enumerations (もしくは、enums)はPython 3.4以降で利用できます</a>。

///

/// tip | "豆知識"