<component name="CopyrightManager">
  <settings>
    <module2copyright>
      <element module="Apply copyright" copyright="apache" />
    </module2copyright>
    <LanguageOptions name="Groovy">
      <option name="fileTypeOverride" value="1" />
    </LanguageOptions>
    <LanguageOptions name="HTML">
      <option name="fileTypeOverride" value="1" />
      <option name="prefixLines" value="false" />
    </LanguageOptions>

Maxim Shafirov <******@****.***> 1308913888 +0400

<component name="InspectionProjectProfileManager">
  <settings>
    <option name="PROJECT_PROFILE" value="Gradle" />
    <version value="1.0" />
  </settings>

<component name="InspectionProjectProfileManager">
  <settings>
    <option name="PROJECT_PROFILE" value="idea.default" />
    <version value="1.0" />
  </settings>

#### `lru_cache` Technical Details

    ```Python hl_lines="1  10"
    {!> ../../../docs_src/settings/app03/main.py!}
    ```

Dann wird bei allen nachfolgenden Aufrufen von `get_settings()`, in den Abhängigkeiten für darauffolgende Requests, dasselbe Objekt zurückgegeben, das beim ersten Aufruf zurückgegeben wurde, anstatt den Code von `get_settings()` erneut auszuführen und ein neues `Settings`-Objekt zu erstellen.

#### Technische Details zu `lru_cache`

    ```Python hl_lines="1  11"
    {!> ../../../docs_src/settings/app03_an/main.py!}
    ```

=== "Python 3.8+ 非注解版本"

    !!! tip
        如果可能，请尽量使用 `Annotated` 版本。

    ```Python hl_lines="1  10"
    {!> ../../../docs_src/settings/app03/main.py!}
    ```

然后，在下一次请求的依赖项中对 `get_settings()` 进行任何后续调用时，它不会执行 `get_settings()` 的内部代码并创建新的 `Settings` 对象，而是返回在第一次调用时返回的相同对象，一次又一次。

#### `lru_cache` 技术细节

from fastapi.testclient import TestClient

from .config import Settings
from .main import app, get_settings

client = TestClient(app)


def get_settings_override():
    return Settings(admin_email="******@****.***")


app.dependency_overrides[get_settings] = get_settings_override


def test_app():
    response = client.get("/info")
    data = response.json()
    assert data == {
        "app_name": "Awesome API",

{!../../../docs_src/settings/app02/main.py!}
```

!!! tip
    👥 🔜 🔬 `@lru_cache` 🍖.

    🔜 👆 💪 🤔 `get_settings()` 😐 🔢.

& ⤴️ 👥 💪 🚚 ⚫️ ⚪️➡️ *➡ 🛠️ 🔢* 🔗 & ⚙️ ⚫️ 🙆 👥 💪 ⚫️.

```Python hl_lines="16  18-20"
{!../../../docs_src/settings/app02/main.py!}
```

### ⚒ & 🔬

⤴️ ⚫️ 🔜 📶 ⏩ 🚚 🎏 ⚒ 🎚 ⏮️ 🔬 🏗 🔗 🔐 `get_settings`:

```Python hl_lines="9-10  13  21"

ings.params,function(e){this._settings.loadInContent&&(""!=this._settings.sourceSelector&&(e=t(e).find(this._settings.sourceSelector).html()),this._parent.find(this._settings.content).html(e)),this._settings.onLoadDone.call(t(this),e),this._removeOverlay()}.bind(this),""!==this._settings.responseType&&this._settings.responseType);var e=t.Event(n.LOADED);t(this._element).trigger(e)},i._addOverlay=function(){this._parent.append(this._overlay);var e=t.Event(n.OVERLAY_ADDED);t(this._element).trigger...