results = await some_library()
```

然後，使用 `async def` 宣告你的*路徑操作函式*：


```Python hl_lines="2"
@app.get('/')
async def read_results():
    results = await some_library()
    return results
```

/// note | 注意

你只能在 `async def` 建立的函式內使用 `await`。

///

---

如果你使用的是第三方函式庫並且它需要與某些外部資源（例如資料庫、API、檔案系統等）進行通訊，但不支援 `await`（目前大多數資料庫函式庫都是這樣），在這種情況下，你可以像平常一樣使用 `def` 宣告*路徑操作函式*，如下所示：

```Python hl_lines="2"

results = await some_library()
```

然后，通过 `async def` 声明你的 *路径操作函数*：

```Python hl_lines="2"
@app.get('/')
async def read_results():
    results = await some_library()
    return results
```

/// note | 注意

你只能在被 `async def` 创建的函数内使用 `await`

///

---

如果你正在使用一个第三方库和某些组件（比如：数据库、API、文件系统...）进行通信，第三方库又不支持使用 `await` （目前大多数数据库三方库都是这样），这种情况你可以像平常那样使用 `def` 声明一个路径操作函数，就像这样：

```Python hl_lines="2"

////

## Abas e caixas coloridas { #tabs-and-colored-boxes }

//// tab | Teste

/// info | Informação
Algum texto
///

/// note | Nota
Algum texto
///

/// note | Detalhes Técnicos
Algum texto
///

/// check | Verifique
Algum texto
///

/// tip | Dica
Algum texto
///

/// warning | Atenção
Algum texto
///

    Client->>Client: Process Item 1
    App->>Client: Send Item 2
    App->>App: Produce Item 3
    Client->>Client: Process Item 2
    App->>Client: Send Item 3
    Client->>Client: Process Item 3
    Note over App: Keeps producing...
    Note over Client: Keeps consuming...
```

Es könnte sogar ein unendlicher Stream sein, bei dem Sie kontinuierlich Daten senden.

## JSON Lines { #json-lines }

Dazu verwenden Sie den `TestClient` in einer `with`-Anweisung, eine Verbindung zum WebSocket herstellend:

{* ../../docs_src/app_testing/tutorial002_py310.py hl[27:31] *}

/// note | Hinweis

Weitere Informationen finden Sie in Starlettes Dokumentation zum [Testen von WebSockets](https://www.starlette.dev/testclient/#testing-websocket-sessions).

/// info | 信息
Some text
///

/// note | 注意
Some text
///

/// note | 技术细节
Some text
///

/// check | 检查
Some text
///

/// tip | 提示
Some text
///

/// warning | 警告
Some text
///

/// danger | 危险
Some text
///

////

//// tab | 信息

选项卡以及 `Info`/`Note`/`Warning`/等提示块，应在竖线（`|`）后添加其标题的翻译。

Pour cela, vous utilisez `TestClient` dans une instruction `with`, en vous connectant au WebSocket :

{* ../../docs_src/app_testing/tutorial002_py310.py hl[27:31] *}

/// note | Remarque

Pour plus de détails, consultez la documentation de Starlette sur le [test des WebSockets](https://www.starlette.dev/testclient/#testing-websocket-sessions).

   ```
  
  #### Additional documentation e.g., KEPs (Kubernetes Enhancement Proposals), usage docs, etc.:
  
  <!--
  This section can be blank if this pull request does not require a release note.
  
  When adding links which point to resources within git repositories, like
  KEPs or supporting documentation, please reference a specific commit and avoid

Und Sie können auch Body-Parameter als optional kennzeichnen, indem Sie den Defaultwert auf `None` setzen:

{* ../../docs_src/body_multiple_params/tutorial001_an_py310.py hl[18:20] *}

/// note | Hinweis

Beachten Sie, dass in diesem Fall das `item`, welches vom Body genommen wird, optional ist. Da es `None` als Defaultwert hat.

///

## Mehrere Body-Parameter { #multiple-body-parameters }

Ao declarar o parâmetro com o tipo sendo um `Request` em sua *função de operação de rota*, o **FastAPI** saberá como passar o `Request` neste parâmetro.

/// tip | Dica

Note que neste caso, nós estamos declarando o parâmetro de path ao lado do parâmetro da requisição.

Assim, o parâmetro de path será extraído, validado, convertido para o tipo especificado e anotado com OpenAPI.