{!../../../docs_src/custom_response/tutorial008.py!}
```

1. This is the generator function. It's a "generator function" because it contains `yield` statements inside.
2. By using a `with` block, we make sure that the file-like object is closed after the generator function is done. So, after it finishes sending the response.

* Add note in [Response Model docs](https://fastapi.tiangolo.com/tutorial/response-model/) about why using a function parameter instead of a function return type annotation. PR [#109](https://github.com/tiangolo/fastapi/pull/109) by [@JHSaunders](https://github.com/JHSaunders).

* Fix event docs (startup/shutdown) function name. PR [#105](https://github.com/tiangolo/fastapi/pull/105) by [@stratosgear](https://github.com/stratosgear).

## 0.10.2

```

### Advantages of `Annotated`

**Using `Annotated` is recommended** instead of the default value in function parameters, it is **better** for multiple reasons. 🤓

The **default** value of the **function parameter** is the **actual default** value, that's more intuitive with Python in general. 😌

        execute ->> code: return the result
    end

    rect rgba(0, 255, 255, .1)
        code ->> function: say_hi(name="Camila")
        function ->> code: return stored result
    end

    rect rgba(0, 255, 0, .1)
        code ->> function: say_hi(name="Rick")
        function ->> execute: execute function code
        execute ->> code: return the result
    end

## Other Asynchronous Function Calls

As the testing function is now asynchronous, you can now also call (and `await`) other `async` functions apart from sending requests to your FastAPI application in your tests, exactly as you would call them anywhere else in your code.

!!! tip

### Other utility functions

Any other utility function that you call directly can be created with normal `def` or `async def` and FastAPI won't affect the way you call it.

This is in contrast to the functions that FastAPI calls for you: *path operation functions* and dependencies.

                """
            ),
        ] = None,
        generate_unique_id_function: Annotated[
            Callable[[routing.APIRoute], str],
            Doc(
                """
                Customize the function used to generate unique IDs for the *path
                operations* shown in the generated OpenAPI.

                qp = location.search.substring(1);
            }

            arr = qp.split("&");
            arr.forEach(function (v,i,_arr) { _arr[i] = '"' + v.replace('=', '":"') + '"';});
            qp = qp ? JSON.parse('{' + arr.join() + '}',
                    function (key, value) {
                        return key === "" ? value : decodeURIComponent(value);
                    }
            ) : {};

```

そのため、`Depends`と一緒に使うことができます。

### 使い方

これで`oauth2_scheme`を`Depends`で依存関係に渡すことができます。

```Python hl_lines="10"
{!../../../docs_src/security/tutorial001.py!}
```

この依存関係は、*path operation function*のパラメーター`token`に代入される`str`を提供します。

**FastAPI**は、この依存関係を使用してOpenAPIスキーマ (および自動APIドキュメント) で「セキュリティスキーム」を定義できることを知っています。

!!! info "技術詳細"

sequenceDiagram

participant code as Code
participant function as say_hi()
participant execute as Execute function

    rect rgba(0, 255, 0, .1)
        code ->> function: say_hi(name="Camila")
        function ->> execute: 执行函数代码
        execute ->> code: 返回结果
    end

    rect rgba(0, 255, 255, .1)
        code ->> function: say_hi(name="Camila")
        function ->> code: 返回存储的结果
    end