* `datetime.timedelta`:
    * Pythonの`datetime.timedelta`です。
    * リクエストとレスポンスでは合計秒数の`float`で表現されます。
    * Pydanticでは「ISO 8601 time diff encoding」として表現することも可能です。<a href="https://docs.pydantic.dev/latest/concepts/serialization/" class="external-link" target="_blank">詳細はドキュメントを参照してください</a>。
* `frozenset`:
    * リクエストとレスポンスでは`set`と同じように扱われます:
        * リクエストでは、リストが読み込まれ、重複を排除して`set`に変換されます。
        * レスポンスでは`set`が`list`に変換されます。

    required: Union[bool, UndefinedType] = Undefined,
    model_config: Type[BaseConfig] = BaseConfig,
    field_info: Optional[FieldInfo] = None,
    alias: Optional[str] = None,
    mode: Literal["validation", "serialization"] = "validation",
) -> ModelField:
    class_validators = class_validators or {}
    if PYDANTIC_V2:
        field_info = field_info or FieldInfo(
            annotation=type_, default=default, alias=alias
        )

            response_name = "Response_" + self.unique_id
            self.response_field = create_model_field(
                name=response_name,
                type_=self.response_model,
                mode="serialization",
            )
            # Create a clone of the field, so that a Pydantic submodel is not returned
            # as is just because it's an instance of a subclass of a more limited class

          }

          // redeclare to help optimizers with b/310253115
          @SuppressWarnings("RedundantOverride")
          @Override
          @J2ktIncompatible // serialization
          @GwtIncompatible // serialization
          Object writeReplace() {
            return super.writeReplace();
          }
        };
      }

      @Override
      ImmutableMap<K, V> map() {

```Python hl_lines="7"
{!../../docs_src/path_params/tutorial002.py!}
```

👉 💼, `item_id` 📣 `int`.

/// check

👉 🔜 🤝 👆 👨‍🎨 🐕‍🦺 🔘 👆 🔢, ⏮️ ❌ ✅, 🛠️, ♒️.

///

## 💽 <abbr title="also known as: serialization, parsing, marshalling">🛠️</abbr>

🚥 👆 🏃 👉 🖼 &amp; 📂 👆 🖥 <a href="http://127.0.0.1:8000/items/3" class="external-link" target="_blank">http://127.0.0.1:8000/items/3</a>, 👆 🔜 👀 📨:

```JSON
{"item_id":3}
```

 * ClassToInstanceMap}</a>.
 *
 * @author Kevin Bourrillion
 * @since 2.0
 */
@J2ktIncompatible
@GwtIncompatible
@SuppressWarnings("serial") // using writeReplace instead of standard serialization
@ElementTypesAreNonnullByDefault
public final class MutableClassToInstanceMap<B extends @Nullable Object>
    extends ForwardingMap<Class<? extends @NonNull B>, B>
    implements ClassToInstanceMap<B>, Serializable {

					"name":"TestDistribution"
				},
				"subprojects":[
					"launcher",
					"build-state",
					"time",
					"logging-api",
					"public-api-tests",
					"kotlin-dsl-plugins",
					"serialization",
					"toolchains-jvm-shared",
					"build-process-services",
					"docs-asciidoctor-extensions-base",
					"internal-instrumentation-processor"
				]
			},
			{
				"parallelizationMethod":{

- প্রেরিত তথ্য <abbr title="যা পরিচিত: serialization, parsing, marshalling">রূপান্তর</abbr>: যা নেটওয়ার্ক থেকে পাইথনের তথ্য এবং ধরনে আসে, এবং সেখান থেকে পড়া:

  - JSON।
  - পাথ প্যারামিটার।
  - কুয়েরি প্যারামিটার।
  - কুকিজ
  - হেডার
  - ফর্ম
  - ফাইল

* Bemeneti adatok<abbr title="also known as: serialization, parsing, marshalling"> átváltása</abbr> : a hálózatról érkező Python adatokká és típusokká. Adatok olvasása következő forrásokból:
    * JSON.
    * Cím paraméterek.
    * Query paraméterek.
    * Cookie-k.
    * Header-ök.
    * Formok.
    * Fájlok.

* <abbr title="também conhecido como: serialization, parsing, marshalling">Conversão</abbr> de dados de entrada: vindo da rede para dados e tipos Python. Consegue ler:
    * JSON.
    * Parâmetros de rota.
    * Parâmetros de _query_ .
    * _Cookies_.
    * Cabeçalhos.
    * Formulários.
    * Arquivos.