# Response – Statuscode ändern { #response-change-status-code }

Sie haben wahrscheinlich schon vorher gelesen, dass Sie einen Default-[Response-Statuscode](../tutorial/response-status-code.md) festlegen können.

In manchen Fällen müssen Sie jedoch einen anderen als den Default-Statuscode zurückgeben.

## Anwendungsfall { #use-case }

Stellen Sie sich zum Beispiel vor, Sie möchten standardmäßig den HTTP-Statuscode „OK“ `200` zurückgeben.

 * for use in test code.
 *
 * <p><b>Do not use this interface</b> for public or protected declarations: it is a fig leaf for
 * bad design, and it does not prevent anyone from using the declaration---and experience has shown
 * that they will. If the method breaks the encapsulation of its class, then its internal
 * representation will be hard to change. Instead, use <a

There are multiple tools that you can use to create those dependables, and they get integrated into OpenAPI so they are shown in the automatic docs UI, they can be used by automatically generated clients and SDKs, etc.

You can import them from `fastapi.security`:

```python
from fastapi.security import (
    APIKeyCookie,
    APIKeyHeader,

    /**
     * Notification message displayed on the login page.
     * This message is shown to users on the authentication page.
     */
    @Size(max = 3000)
    public String notificationLogin;

    /**
     * Notification message displayed on the search top page.
     * This message is shown to users on the main search page.
     */
    @Size(max = 3000)
    public String notificationSearchTop;

    }

    /**
     * The CRUD operation mode (create, update, etc.).
     */
    @ValidateTypeFailure
    public Integer crudMode;

    /**
     * The search term for which related content is shown.
     */
    @Required
    @Size(max = 10000)
    public String term;

    /**
     * The related content to be displayed.
     */
    @Required
    @Size(max = 10000)
    public String content;

    response is already "successfully" sent back to the client, but there's still
    an error in the server afterwards, an exception is raised and captured or shown
    in the server logs.
    """
    with TestClient(app, raise_server_exceptions=False) as client:
        response = client.get("/broken")
        assert response.status_code == 200

Schon bevor **JSON Schema** `examples` unterstützte, unterstützte OpenAPI ein anderes Feld, das auch `examples` genannt wurde.

Diese **OpenAPI-spezifischen** `examples` finden sich in einem anderen Abschnitt der OpenAPI-Spezifikation. Sie sind **Details für jede *Pfadoperation***, nicht für jedes JSON-Schema.

    return this;
  }

  private long elapsedNanos() {
    return isRunning ? ticker.read() - startTick + elapsedNanos : elapsedNanos;
  }

  /**
   * Returns the current elapsed time shown on this stopwatch, expressed in the desired time unit,
   * with any fraction rounded down.
   *
   * <p><b>Note:</b> the overhead of measurement can be more than a microsecond, so it is generally

    """
    When a dependency with yield raises after the streaming response already started
    the 200 status code is already sent, but there's still an error in the server
    afterwards, an exception is raised and captured or shown in the server logs.
    """
    with TestClient(app, raise_server_exceptions=False) as client:
        response = client.get("/broken-session-stream")
        assert response.status_code == 200

## Documentation Response description - OpenAPI { #documentation-response-description-openapi }

To define the description of the response, shown in the docs UI, read the docs for [Tutorial - Path Operation Configurations - Response description](../tutorial/path-operation-configuration.md#response-description).