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

Then for any subsequent calls of `get_settings()` in the dependencies for the next requests, instead of executing the internal code of `get_settings()` and creating a new `Settings` object, it will return the same object that was returned on the first call, again and again.

#### `lru_cache` Technical Details

=== "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

`@lru_cache` 修改了它所装饰的函数，以返回第一次返回的相同值，而不是再次计算它，每次都执行函数的代码。

因此，下面的函数将对每个参数组合执行一次。然后，每个参数组合返回的值将在使用完全相同的参数组合调用函数时再次使用。

🚥 🔗 🔢 💖:

```Python
def get_settings():
    return Settings()
```

👥 🔜 ✍ 👈 🎚 🔠 📨, & 👥 🔜 👂 `.env` 📁 🔠 📨. 👶 👶

✋️ 👥 ⚙️ `@lru_cache` 👨‍🎨 🔛 🔝, `Settings` 🎚 🔜 ✍ 🕴 🕐, 🥇 🕰 ⚫️ 🤙. 👶 👶

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

    ```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`

            }
            final HttpServletResponse response = LaResponseUtil.getResponse();
            try {
                final Auth auth = new Auth(getSettings(), request, response);
                final Saml2Settings settings = auth.getSettings();
                settings.setSPValidationOnly(true);
                final String metadata = settings.getSPMetadata();

        return repositories == null ? null : map(repositories, this::toArtifactRepository);
    }

    @Nonnull
    @Override
    public Settings getSettings() {
        return getMavenSession().getSettings().getDelegate();
    }

    @Nonnull
    @Override
    public Map<String, String> getUserProperties() {

                .session(session)
                .userSettingsSource(Source.fromPath(getSettings("settings-simple")))
                .build();

        SettingsBuilderResult result = builder.build(request);
        assertNotNull(result);
        assertNotNull(result.getEffectiveSettings());
    }

    private Path getSettings(String name) {
        return Paths.get("src/test/resources/" + name + ".xml").toAbsolutePath();
    }

     *
     * @return The system properties, never {@code null}.
     */
    public Properties getSystemProperties() {
        return request.getSystemProperties();
    }

    public Settings getSettings() {
        return settings;
    }

    public List<MavenProject> getProjects() {
        return projects;
    }

    /**
     * @deprecated use {@link #getTopDirectory()} ()}
     */

            return new DefaultSession(session, repositorySystem, repositories, null, lookup);
        }

        @Override
        public Settings getSettings() {
            return Settings.newInstance();
        }

        @Override
        public Map<String, String> getUserProperties() {
            return Map.of();
        }

        @Override

        objects.put("session.", session);
        objects.put("project.", project);
        objects.put("mojo.", mojoExecution);
        objects.put("settings.", session.getSettings());
        for (Map.Entry<String, Object> ctx : objects.entrySet()) {
            if (expression.startsWith(ctx.getKey())) {
                try {
                    int pathSeparator = expression.indexOf('/');