* Returns the value of the {@link Field}.
     *
     * @param <T>
     *            the type of the field
     * @param target
     *            the target object. Must not be {@literal null}
     * @return the value of the {@link Field}
     */
    <T> T getFieldValue(Object target);

    /**
     * Returns the value of the static {@link Field}.
     *
     * @param <T>

     *
     * @param <T>
     *            the property type
     * @param target
     *            the target object. Must not be {@literal null}
     * @return the property value
     */
    <T> T getValue(Object target);

    /**
     * Sets the value of the property.
     *
     * @param target
     *            the target object. Must not be {@literal null}
     * @param value

`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
```

    private static final long serialVersionUID = 7760491787158046906L;

    /**
     * The target class.
     */
    private final Class<?> targetClass;

    /**
     * Creates a {@link InvocationTargetRuntimeException}.
     *
     * @param targetClass
     *            Target class
     * @param cause
     *            The cause of the exception
     */

///

## Más información

Para aprender más sobre las opciones, revisa la documentación de Starlette para:

* <a href="https://www.starlette.io/websockets/" class="external-link" target="_blank">La clase `WebSocket`</a>.

   * i, i + target.length)} contains exactly the same elements as {@code target}.
   *
   * @param array the array to search for the sequence {@code target}
   * @param target the array to search for as a sub-sequence of {@code array}
   */
  public static int indexOf(char[] array, char[] target) {
    checkNotNull(array, "array");
    checkNotNull(target, "target");
    if (target.length == 0) {

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

First, make sure you create your [virtual environment](../virtual-environments.md){.internal-link target=_blank}, activate it, and then install the `pydantic-settings` package:

<div class="termy">

```console

Qualquer função que possa ser utilizada com:

* <a href="https://docs.python.org/3/library/contextlib.html#contextlib.contextmanager" class="external-link" target="_blank">`@contextlib.contextmanager`</a> ou
* <a href="https://docs.python.org/3/library/contextlib.html#contextlib.asynccontextmanager" class="external-link" target="_blank">`@contextlib.asynccontextmanager`</a>

pode ser utilizada como uma dependência do **FastAPI**.

     */
    int GENERIC_READ = 0x80000000; // 31

    // flags for move and copy
    /**
     * Target must be a file flag.
     */
    int FLAGS_TARGET_MUST_BE_FILE = 0x0001;
    /**
     * Target must be a directory flag.
     */
    int FLAGS_TARGET_MUST_BE_DIRECTORY = 0x0002;
    /**
     * Copy target in ASCII mode flag.
     */
    int FLAGS_COPY_TARGET_MODE_ASCII = 0x0004;
    /**

    private static final long serialVersionUID = 5220902071756706607L;

    /**
     * The target class.
     */
    private final Class<?> targetClass;

    /**
     * Creates a {@link InstantiationRuntimeException}.
     *
     * @param targetClass
     *            Target class
     * @param cause
     *            The cause of the exception
     */