* **编辑器支持**。
* **类型检查**。

...并且 **FastAPI** 还会用这些类型声明来：

* **定义参数要求**：声明对请求路径参数、查询参数、请求头、请求体、依赖等的要求。
* **转换数据**：将来自请求的数据转换为需要的类型。
* **校验数据**： 对于每一个请求：
    * 当数据校验失败时自动生成**错误信息**返回给客户端。
* 使用 OpenAPI **记录** API：
    * 然后用于自动生成交互式文档的用户界面。

听上去有点抽象。不过不用担心。你将在 [教程 - 用户指南](tutorial/index.md){.internal-link target=_blank} 中看到所有的实战。

最重要的是，通过使用标准的 Python 类型，只需要在一个地方声明（而不是添加更多的类、装饰器等），**FastAPI** 会为你完成很多的工作。

   * the source will contain the concatenated data from the streams of the underlying sources.
   *
   * <p>Only one underlying stream will be open at a time. Closing the concatenated stream will
   * close the open underlying stream.
   *
   * @param sources the sources to concatenate
   * @return a {@code CharSource} containing the concatenated data
   * @since 15.0
   */

    <td>GET /swagger.json</td>
    <td>GET /openapi/v2
Accept: application/json</td>
  </tr>
  <tr>
    <td>GET /swagger-2.0.0.pb-v1</td>
    <td>GET /openapi/v2
Accept: application/com.github.proto-openapi.spec.v2@v1.0+protobuf</td>
  </tr>
  <tr>
    <td>GET /swagger-2.0.0.pb-v1.gz</td>
    <td>GET /openapi/v2
Accept: application/com.github.proto-openapi.spec.v2@v1.0+protobuf Accept-Encoding: gzip</td>

## **2. Prerequisites**

- Install Hortonworks Distribution using this [guide.](https://docs.hortonworks.com/HDPDocuments/Ambari-2.7.1.0/bk_ambari-installation/content/ch_Installing_Ambari.html)

* Get command uses OpenAPI schema to enhance display for a resource if run with flag 'use-openapi-print-columns'.  ([#46235](https://github.com/kubernetes/kubernetes/pull/46235), [@droot](https://github.com/droot))
    * An example command:
    * kubectl get pods --use-openapi-print-columns

name: build

on:
  push:
    branches:
      - master
  pull_request:
    types: [opened, labeled, unlabeled, synchronize]

permissions:
  contents: read

env:
  GRADLE_OPTS: "-Dorg.gradle.jvmargs=-Xmx4g -Dorg.gradle.daemon=false -Dkotlin.incremental=false"

jobs:
  publish:
    runs-on: ubuntu-latest
    if: github.repository == 'square/okhttp' && github.ref == 'refs/heads/master'

    steps:
      - name: Checkout

例えば、`Image`モデルのように`url`フィールドがある場合、`str`の代わりにPydanticの`HttpUrl`を指定することができます:

```Python hl_lines="4 10"
{!../../docs_src/body_nested_models/tutorial005.py!}
```

文字列は有効なURLであることが確認され、そのようにJSONスキーマ・OpenAPIで文書化されます。

## サブモデルのリストを持つ属性

Pydanticモデルを`list`や`set`などのサブタイプとして使用することもできます:

```Python hl_lines="20"
{!../../docs_src/body_nested_models/tutorial006.py!}
```

*   `kubectl apply` now calculates the diff between the current and new configurations based on the OpenAPI spec. If the OpenAPI spec is not available, it falls back to baked-in types. ([#51321](https://github.com/kubernetes/kubernetes/pull/51321),[ @mengqiy](https://github.com/mengqiy))

## Changelog since v1.23.5

## Changes by Kind

### API Change

- Omits alpha-level enums from the static openapi file captured in api/openapi-spec ([#109179](https://github.com/kubernetes/kubernetes/pull/109179), [@liggitt](https://github.com/liggitt)) [SIG Apps and Auth]

### Feature

        return [
            ModelField(field_info=field_info, name=name)
            for name, field_info in model.model_fields.items()
        ]

else:
    from fastapi.openapi.constants import REF_PREFIX as REF_PREFIX
    from pydantic import AnyUrl as Url  # noqa: F401
    from pydantic import (  # type: ignore[assignment]
        BaseConfig as BaseConfig,  # noqa: F401
    )