### Установка `pydantic-settings` { #install-pydantic-settings }

Сначала убедитесь, что вы создали [виртуальное окружение](../virtual-environments.md){.internal-link target=_blank}, активировали его, а затем установили пакет `pydantic-settings`:

<div class="termy">

    }

    /**
     * Test method for {@link jcifs.pac.PacSidAttributes#getId()}.
     */
    @Test
    void testGetId() {
        // Test the getId method
        assertEquals(sidMock, pacSidAttributes.getId(), "getId should return the correct SID.");
    }

    /**
     * Test method for {@link jcifs.pac.PacSidAttributes#getAttributes()}.
     */
    @Test

 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.crawler.entity;

import java.io.Serializable;

/**
 * Represents an alternate link entry within a sitemap URL.
 * This class encapsulates the properties of an alternate link as defined in the hreflang annotation.
 *
 * <p>
 * The hreflang attribute tells search engines about alternate versions of a page in different languages

     */
    DependencyNode getDependencyGraph();

    /**
     * Gets the transitive dependencies of the project that were not excluded by
     * {@link DependencyResolutionRequest#getResolutionFilter()}. This list is a union of the results from
     * {@link #getResolvedDependencies()} and {@link #getUnresolvedDependencies()}.
     *
     * @return The transitive dependencies, never {@code null}.
     */
    List<Dependency> getDependencies();

import org.codelibs.fess.crawler.service.UrlFilterService;

import jakarta.annotation.Resource;

/**
 * Implementation of the {@link UrlFilter} interface.
 * This class provides functionality to filter URLs based on include and exclude patterns.
 * It uses a {@link UrlFilterService} to manage the URL filtering rules.
 * The class supports caching of include and exclude patterns for scenarios where a session ID is not available.

Якщо у Вас стара версія, при спробі використати `Annotated` можуть виникати помилки.

Переконайтеся, що Ви [оновили версію FastAPI](../deployment/versions.md#upgrading-the-fastapi-versions){.internal-link target=_blank} принаймні до версії 0.95.1 перед використанням `Annotated`.

///

## Оголошення метаданих

Ви можете оголошувати всі ті ж параметри, що і для `Query`.

该命令行程序 `fastapi` 就是 **FastAPI CLI**。

FastAPI CLI 接收你的 Python 程序路径，自动检测包含 FastAPI 的变量（通常命名为 `app`）及其导入方式，然后启动服务。

在生产环境中，你应该使用 `fastapi run` 命令。🚀

在内部，**FastAPI CLI** 使用了 <a href="https://www.uvicorn.dev" class="external-link" target="_blank">Uvicorn</a>，这是一个高性能、适用于生产环境的 ASGI 服务器。😎

## `fastapi dev`

当你运行 `fastapi dev` 时，它将以开发模式运行。

默认情况下，它会启用**自动重载**，因此当你更改代码时，它会自动重新加载服务器。该功能是资源密集型的，且相较不启用时更不稳定，因此你应该仅在开发环境下使用它。

 * 3.2.3 and earlier are encouraged to use {@link JavaToolchainImpl}.
 * <strong>Note:</strong> This is an internal component whose interface can change without prior notice.
 *
 * @deprecated clients that do not require compatibility with Maven 3.2.3 and earlier should link to
 *             {@link JavaToolchainImpl} instead.
 */
@Deprecated

    assertEquals("toArray() ordered contents: ", expected, asList(actual));
  }

  /**
   * Returns the {@link Method} instance for {@link #testToArray_isPlainObjectArray()} so that tests
   * of {@link Arrays#asList(Object[])} can suppress it with {@code
   * FeatureSpecificTestSuiteBuilder.suppressing()} until <a

`TestClient` 是基于 <a href="https://www.python-httpx.org" class="external-link" target="_blank">HTTPX</a> 的。幸运的是，我们可以直接使用它来测试API。

## 示例

举个简单的例子，让我们来看一个[更大的应用](../tutorial/bigger-applications.md){.internal-link target=_blank}和[测试](../tutorial/testing.md){.internal-link target=_blank}中描述的类似文件结构：

```
.
├── app
│   ├── __init__.py
│   ├── main.py
│   └── test_main.py
```