이 간단한 경우는 반환 타입 어노테이션이 `Response` 클래스(또는 그 서브클래스)이기 때문에 FastAPI에서 자동으로 처리됩니다.

그리고 `RedirectResponse`와 `JSONResponse`는 모두 `Response`의 서브클래스이므로, 타입 어노테이션이 올바르기 때문에 도구들도 만족합니다.

### Response 서브클래스 어노테이션 { #annotate-a-response-subclass }

타입 어노테이션에 `Response`의 서브클래스를 사용할 수도 있습니다:

{* ../../docs_src/response_model/tutorial003_03_py310.py hl[8:9] *}

이는 `RedirectResponse`가 `Response`의 서브클래스이기 때문에 동작하며, FastAPI가 이 간단한 경우를 자동으로 처리합니다.

* event handler
* exception handler
* 처리하다

* model
* Pydantic model
* data model
* database model
* form model
* model object

* class
* base class
* parent class
* subclass
* child class
* sibling class
* class method

* header
* headers
* authorization header
* `Authorization` header
* forwarded header

* dependency injection system
* dependency

    /*
     * requireNonNull is not safe: Joiner.on(...).join(somethingThatContainsNull) will indeed throw.
     * However, Joiner.on(...).useForNull(...).join(somethingThatContainsNull) *is* safe -- because
     * it returns a subclass of Joiner that overrides this method to tolerate null inputs.
     *
     * Unfortunately, we don't distinguish between these two cases in our public API: Joiner.on(...)

Y las herramientas también estarán felices porque tanto `RedirectResponse` como `JSONResponse` son subclases de `Response`, por lo que la anotación del tipo es correcta.

### Anotar una Subclase de Response { #annotate-a-response-subclass }

También puedes usar una subclase de `Response` en la anotación del tipo:

{* ../../docs_src/response_model/tutorial003_03_py310.py hl[8:9] *}

import jcifs.smb.RequestParam;

/**
 * This class simplifies communication for protocols that support
 * multiplexing requests. It encapsulates a stream and some protocol
 * knowledge (provided by a concrete subclass) so that connecting,
 * disconnecting, sending, and receiving can be syncronized
 * properly. Apparatus is provided to send and receive requests
 * concurrently.
 */

/**

Et les outils seront également satisfaits car `RedirectResponse` et `JSONResponse` sont des sous-classes de `Response`, donc l'annotation de type est correcte.

### Annoter une sous-classe de Response { #annotate-a-response-subclass }

Vous pouvez aussi utiliser une sous-classe de `Response` dans l'annotation de type :

{* ../../docs_src/response_model/tutorial003_03_py310.py hl[8:9] *}

   * Returns a serializable form of this object. Non-public subclasses should not override this
   * method. Publicly-accessible subclasses must override this method and should return a subclass
   * of SerializedForm whose readResolve() method returns objects of the subclass type.
   */
  @J2ktIncompatible // serialization
  Object writeReplace() {
    return new SerializedForm<>(this);
  }

这个简单场景 FastAPI 会自动处理，因为返回类型注解是 `Response`（或其子类）。

工具也会满意，因为 `RedirectResponse` 和 `JSONResponse` 都是 `Response` 的子类，所以类型注解是正确的。

### 注解 Response 的子类 { #annotate-a-response-subclass }

你也可以在类型注解中使用 `Response` 的子类：

{* ../../docs_src/response_model/tutorial003_03_py310.py hl[8:9] *}

这同样可行，因为 `RedirectResponse` 是 `Response` 的子类，FastAPI 会自动处理这个简单场景。

    //                                                                    Helper Classes
    //                                                                    ================

    /**
     * Testable subclass that bypasses ComponentUtil dependencies.
     * This allows testing the filter logic without requiring the DI container.
     */
    private static class TestableLoadControlFilter extends LoadControlFilter {

        final TestableGroovyEngine testEngine = new TestableGroovyEngine();
        assertEquals("groovy", testEngine.testGetName());
    }

    /**
     * Testable GroovyEngine subclass for testing protected methods
     */
    static class TestableGroovyEngine extends GroovyEngine {
        boolean logScriptExecutionCalled = false;
        String lastLoggedScript = null;