Query параметр `q` має тип `str | None`, що означає, що він може бути як `str`, так і `None`. За замовчуванням він має значення `None`, тому FastAPI розуміє, що цей параметр не є обов'язковим.

/// note | Примітка

FastAPI знає, що `q` не є обов’язковим, завдяки значенню за замовчуванням `= None`.

Використання `str | None` дозволить Вашому редактору коду надавати кращу підтримку та виявляти помилки.

///

   * response body is [closed][ResponseBody]. The recipient of the callback may consume the response
   * body on another thread.
   *
   * Note that transport-layer success (receiving a HTTP response code, headers and body) does not
   * necessarily indicate application-layer success: `response` may still indicate an unhappy HTTP
   * response code like 404 or 500.
   */

 * Defines events that the model builder fires during construction of the effective model. When a listener encounters
 * errors while processing the event, it can report these problems via {@link ModelBuildingEvent#getProblems()}.
 * Note: To cope with future extensions to this interface, it is strongly recommended to extend
 * {@link AbstractModelBuildingListener} rather than to directly implement this interface.
 *

import java.lang.annotation.Retention;
import java.lang.annotation.Target;

/**
 * Signifies that a test should not be run under Android. This annotation is respected only by our
 * Google-internal Android suite generators. Note that those generators also suppress any test
 * annotated with LargeTest.
 *
 * <p>For more discussion, see {@linkplain com.google.common.base.AndroidIncompatible the
 * documentation on another copy of this annotation}.
 */

import java.lang.annotation.Retention;
import java.lang.annotation.Target;

/**
 * Signifies that a test should not be run under Android. This annotation is respected only by our
 * Google-internal Android suite generators. Note that those generators also suppress any test
 * annotated with MediumTest or LargeTest.
 *
 * <p>For more discussion, see {@linkplain com.google.common.base.AndroidIncompatible the

                    .println("Tool purpose is to configure password management on developer workstations.");
            context.terminal
                    .writer()
                    .println(
                            "Note: Generated configuration can be moved/copied to headless environments, if configured as such.");
            return EncryptInvoker.BAD_OPERATION;
        }

        return doExecute(context);
    }

 * under the License.
 */
package org.apache.maven.lifecycle.internal;

import java.util.Objects;

/**
 * A Maven task, at this level is merely just an opaque string.
 * <p>
 * <strong>NOTE:</strong> This class is not part of any public api and can be changed or deleted without prior notice.
 *
 * @since 4.0.0
 */
public abstract class Task {

    private final String value;

Например, чтобы объявить ещё один ответ со статус-кодом `404` и Pydantic-моделью `Message`, можно написать:

{* ../../docs_src/additional_responses/tutorial001_py39.py hl[18,22] *}

/// note | Примечание

Имейте в виду, что необходимо возвращать `JSONResponse` напрямую.

///

/// info | Информация

Ключ `model` не является частью OpenAPI.

 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.maven.lifecycle.internal;

/**
 * A task that is a lifecycle.
 * <p>
 * <strong>NOTE:</strong> This class is not part of any public api and can be changed or deleted without prior notice.
 *
 * @since 3.0
 */
public final class LifecycleTask extends Task {
    public LifecycleTask(String lifecyclePhase) {

      What change are you proposing to the upload configuration, and why?
      For new upload configuration, which new counters will be collected, what
      do they measure, and why is it important to collect them?
      Note that uploaded data must not carry sensitive user information.
      See [go.dev/doc/telemetry#proposals](https://go.dev/doc/telemetry#proposals)
      for more details on telemetry proposals.
  validations:
    required: true