{* ../../docs_src/first_steps/tutorial001_py310.py hl[1] *}

`FastAPI`は、APIのすべての機能を提供するPythonクラスです。

/// note | 技術詳細

`FastAPI`は`Starlette`を直接継承するクラスです。

`FastAPI`でも[Starlette](https://www.starlette.dev/)のすべての機能を利用可能です。

///

### Step 2: `FastAPI`の「インスタンス」を生成 { #step-2-create-a-fastapi-instance }

{* ../../docs_src/first_steps/tutorial001_py310.py hl[3] *}

**FastAPI** nimmt dann, abgesehen von all den anderen Dingen, die es tut, dieses JSON-Schema und fügt es in OpenAPI ein.

///

### [Starlette](https://www.starlette.dev/) { #starlette }

             to quit<b>)</b>
     <span style="background-color:#007166"><font color="#D3D7CF"> INFO </font></span>  Started reloader process <b>[</b><font color="#34E2E2"><b>383138</b></font><b>]</b> using WatchFiles
     <span style="background-color:#007166"><font color="#D3D7CF"> INFO </font></span>  Started server process <b>[</b><font color="#34E2E2"><b>383153</b></font><b>]</b>

그래서 서드파티 ASGI middleware 문서에서는 아마 다음과 같이 하라고 안내할 것입니다:

```Python
from unicorn import UnicornMiddleware

app = SomeASGIApp()

new_app = UnicornMiddleware(app, some_config="rainbow")
```

하지만 FastAPI(정확히는 Starlette)는 더 간단한 방법을 제공하며, 이를 통해 내부 middleware가 서버 오류를 처리하고 커스텀 예외 핸들러가 올바르게 동작하도록 보장합니다.

이를 위해(그리고 CORS 예제에서처럼) `app.add_middleware()`를 사용합니다.

```Python
from fastapi import FastAPI
from unicorn import UnicornMiddleware

             to quit<b>)</b>
     <span style="background-color:#007166"><font color="#D3D7CF"> INFO </font></span>  Started reloader process <b>[</b><font color="#34E2E2"><b>383138</b></font><b>]</b> using WatchFiles
     <span style="background-color:#007166"><font color="#D3D7CF"> INFO </font></span>  Started server process <b>[</b><font color="#34E2E2"><b>383153</b></font><b>]</b>

             quit<b>)</b>
     <span style="background-color:#007166"><font color="#D3D7CF"> INFO </font></span>  Started reloader process <b>[</b><font color="#34E2E2"><b>383138</b></font><b>]</b> using WatchFiles
     <span style="background-color:#007166"><font color="#D3D7CF"> INFO </font></span>  Started server process <b>[</b><font color="#34E2E2"><b>383153</b></font><b>]</b>

这只是一种快捷方式，具有相同的数字代码，但它可以使用编辑器的自动补全功能：

<img src="/img/tutorial/response-status-code/image02.png">

/// note | 技术细节

也可以使用 `from starlette import status`。

为了让开发者更方便，**FastAPI** 提供了与 `starlette.status` 完全相同的 `fastapi.status`。但它直接来自于 Starlette。

///

## 更改默认状态码 { #changing-the-default }

    private static final long serialVersionUID = 1L;

    /** Default number of records to display per page. */
    public static final int DEFAULT_PAGE_SIZE = 20;

    /** Default current page number when pagination starts. */
    public static final int DEFAULT_CURRENT_PAGE_NUMBER = 1;

    /** Total number of records available across all pages. */
    private int allRecordCount;

    /** Total number of pages available for pagination. */

        assertEquals(10, offsetBuffer.index);
        assertEquals(0, offsetBuffer.length);
    }

    @Test
    void testDerive() {
        ndrBuffer.advance(50); // Advance the original buffer
        NdrBuffer derivedBuffer = ndrBuffer.derive(10);

        // Verify derived buffer properties
        assertSame(buffer, derivedBuffer.buf);

## Get started

In this document we will explain in detail on how to configure admin users.

### 1. Prerequisites