}


def test_get_item_does_not_exist(client: TestClient):
    response = client.get("/items?id=isbn-nope")
    assert response.status_code == 200, response.text
    assert response.json() == {"id": "isbn-nope", "name": None}


def test_get_invalid_item(client: TestClient):
    response = client.get("/items?id=wtf-yes")
    assert response.status_code == 422, response.text
    assert response.json() == snapshot(
        {

## レスポンスモデルのエンコーディングパラメータ

レスポンスモデルにはデフォルト値を設定することができます:

{* ../../docs_src/response_model/tutorial004.py hl[11,13,14] *}

* `description: str = None`は`None`がデフォルト値です。
* `tax: float = 10.5`は`10.5`がデフォルト値です。
* `tags: List[str] = []` は空のリスト（`[]`）がデフォルト値です。

しかし、実際に保存されていない場合には結果からそれらを省略した方が良いかもしれません。

```Python
print(user_dict)
```

obtendremos un `dict` de Python con:

```Python
{
    'username': 'john',
    'password': 'secret',
    'email': '******@****.***',
    'full_name': None,
}
```

#### Desempaquetando un `dict` { #unpacking-a-dict }

#### `Optional`

`Optional` bir değişkenin `str`gibi bir tipi olabileceğini ama isteğe bağlı olarak tipinin `None` olabileceğini belirtir:

```Python hl_lines="1  4"
{!../../docs_src/python_types/tutorial009.py!}
```

`str` yerine `Optional[str]` kullanmak editorün bu değerin her zaman `str` tipinde değil bazen `None` tipinde de olabileceğini belirtir ve hataları tespit etmemizde yardımcı olur.

#### Generic tipler

    _os.getenv("TF_USE_MODULAR_FILESYSTEM", "0") == "1"):
  import tensorflow_io_gcs_filesystem as _tensorflow_io_gcs_filesystem

# Lazy-load Keras v1.
_tf_uses_legacy_keras = (
    _os.environ.get("TF_USE_LEGACY_KERAS", None) in ("true", "True", "1"))
setattr(_current_module, "keras", _KerasLazyLoader(globals(), mode="v1"))
_module_dir = _module_util.get_parent_dir_for_name("keras._tf_keras.keras")

import org.gradle.work.DisableCachingByDefault

@CompileStatic
@DisableCachingByDefault(because = "Only filters the input artifact")
abstract class FindGradleClasspath implements TransformAction<TransformParameters.None> {

    @PathSensitive(PathSensitivity.NAME_ONLY)
    @InputArtifact
    abstract Provider<FileSystemLocation> getArtifact()

    @Override
    void transform(TransformOutputs outputs) {

     *
     * @param value The configuration value to preprocess, must not be {@code null}.
     * @param type The target type of the value, may be {@code null}.
     * @return The processed configuration value or {@code null} if none.
     * @throws BeanConfigurationException If an error occurred while preprocessing the value.
     */
    Object preprocessValue(String value, Class<?> type) throws BeanConfigurationException;

    private val execOps: ExecOperations,
    private val fsOps: FileSystemOperations,
    private val fileOps: FileOperations
) : DefaultTask() {
    @get:InputFiles
    @get:PathSensitive(PathSensitivity.NONE)
    abstract val androidStudioRuntime: ConfigurableFileCollection

    @get:OutputDirectory
    abstract val outputDir: DirectoryProperty

    @TaskAction
    fun extract() {

	AssertEqual(t, result3, namedUser)

	var result4 NamedUser
	if err := DB.Raw("SELECT * FROM named_users WHERE name1 = @name OR name2 = @name2 OR name3 = @name", sql.Named("name", "jinzhu-none"), sql.Named("name2", "jinzhu2")).Find(&result4).Error; err != nil {
		t.Errorf("failed to update with named arg")
	}

	AssertEqual(t, result4, namedUser)

*--------------------+---------------+------------+------------+-----------+---------------------+-----------------------+
| <<<pom>>>          |               | <= type>   | <= type>   | none      |                     |                       |
*--------------------+---------------+------------+------------+-----------+---------------------+-----------------------+