**FastAPI** 使用 <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md" class="external-link" target="_blank">OpenAPI</a> 生成概图，所以能兼容很多工具。

因此，**FastAPI** 还内置了 ReDoc 生成的备选 API 文档，可在此查看 <a href="http://127.0.0.1:8000/redoc" class="external-link" target="_blank">http://127.0.0.1:8000/redoc</a>：

<img src="/img/tutorial/path-params/image02.png">

同样，还有很多兼容工具，包括多种语言的代码生成工具。

## Pydantic

Por causa disso, o próprio **FastAPI** fornece uma documentação alternativa da API (usando ReDoc), que você pode acessar em <a href="http://127.0.0.1:8000/redoc" class="external-link" target="_blank">http://127.0.0.1:8000/redoc</a>:

<img src="/img/tutorial/path-params/image02.png">

```console
$ OPENAPI_URL= uvicorn main:app

<span style="color: green;">INFO</span>:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
```

</div>

그리고 `/openapi.json`, `/docs` 또는 `/redoc`의 URL로 이동하면 `404 Not Found`라는 오류가 다음과 같이 표시됩니다:

```JSON
{
    "detail": "Not Found"
}

Y también puedes ir a <a href="http://192.168.99.100/redoc" class="external-link" target="_blank">http://192.168.99.100/redoc</a> o <a href="http://127.0.0.1/redoc" class="external-link" target="_blank">http://127.0.0.1/redoc</a> (o equivalente, usando tu host de Docker).

Verás la documentación alternativa automática (proporcionada por <a href="https://github.com/Rebilly/ReDoc" class="external-link" target="_blank">ReDoc</a>):

          required: true
        - label: I already checked if it is not related to FastAPI but to [ReDoc](https://github.com/Redocly/redoc).
          required: true
  - type: checkboxes
    id: help
    attributes:
      label: Commit to Help
      description: |
        After submitting this, I commit to one of:

이 덕분에 **FastAPI**는 <a href="http://127.0.0.1:8000/redoc" class="external-link" target="_blank">http://127.0.0.1:8000/redoc</a>로 접속할 수 있는 (ReDoc을 사용하는) 대체 API 문서를 제공합니다:

<img src="/img/tutorial/path-params/image02.png">

이와 마찬가지로 다양한 언어에 대한 코드 생성 도구를 포함하여 여러 호환되는 도구가 있습니다.

## Pydantic

$ OPENAPI_URL= uvicorn main:app

<span style="color: green;">INFO</span>:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
```

</div>

Then if you go to the URLs at `/openapi.json`, `/docs`, or `/redoc` you will just get a `404 Not Found` error like:

```JSON
{
    "detail": "Not Found"
}

$ OPENAPI_URL= uvicorn main:app

<span style="color: green;">INFO</span>:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
```

</div>

Então, se você acessar as URLs em `/openapi.json`, `/docs` ou `/redoc`, você receberá apenas um erro `404 Not Found` como:

```JSON
{
    "detail": "Not Found"
}

![Swagger UI interaction](https://fastapi.tiangolo.com/img/index/index-03-swagger-02.png)

* <a href="https://github.com/Rebilly/ReDoc" class="external-link" target="_blank"><strong>ReDoc</strong></a>を使用したもう一つのAPIドキュメント生成。

![ReDoc](https://fastapi.tiangolo.com/img/index/index-06-redoc-02.png)

### 現代的なPython

FastAPIの機能はすべて、標準のPython 3.8型宣言に基づいています（Pydanticの功績）。新しい構文はありません。ただの現代的な標準のPythonです。

你还可以访问 <a href="http://192.168.99.100/redoc" class="external-link" target="_blank">http://192.168.99.100/redoc</a> 或 <a href="http://127.0.0.1/redoc" class="external-link" target="_blank">http://127.0.0.1/redoc</a> （或其他等价的，使用 Docker 主机）。

你将看到备选的自动文档（由 <a href="https://github.com/Rebilly/ReDoc" class="external-link" target="_blank">ReDoc</a> 提供）：

![ReDoc](https://fastapi.tiangolo.com/img/index/index-02-redoc-simple.png)