Ви також можете використовувати поля `bytes` з `ser_json_bytes` у конфігурації моделі для вихідних даних, і Pydantic серіалізує байти як base64 під час формування відповіді JSON.

{* ../../docs_src/json_base64_bytes/tutorial001_py310.py ln[1:2,12:16,29,38:41] hl[16] *}

## Pydantic `bytes` для вхідних і вихідних даних { #pydantic-bytes-for-input-and-output-data }

 */
@J2ktIncompatible
@GwtIncompatible
public final class CountingOutputStream extends FilterOutputStream {

  private long count;

  /**
   * Wraps another output stream, counting the number of bytes written.
   *
   * @param out the output stream to be wrapped
   */
  public CountingOutputStream(OutputStream out) {
    super(checkNotNull(out));
  }

  /** Returns the number of bytes written. */

  - type: textarea
    id: gopls-version
    attributes:
      label: "gopls version"
      description: "Output of `gopls -v version` on the command line"
    validations:
      required: true
  - type: textarea
    id: go-env
    attributes:
      label: "go env"
      description: "Output of `go env` on the command line in your workspace directory"
      render: shell
    validations:
      required: true

 *   <li>Decrements a counter atomically
 * </ul>
 */
@GwtCompatible
@ReflectionSupport(value = ReflectionSupport.Level.FULL)
abstract class AggregateFutureState<OutputT extends @Nullable Object>
    extends AbstractFuture.TrustedFuture<OutputT> {
  /*
   * The following fields are package-private, even though we intend never to use them outside this
   * file. For discussion, see AbstractFutureState.
   */

                description = "The test task you want to run",
            )
            text(
                testNameParameterName,
                """org.gradle.api.tasks.CachedTaskExecutionIntegrationTest.outputs*are*correctly*loaded*from*cache""",
                display = ParameterDisplay.PROMPT,
                allowEmpty = false,
                description =

    private static LogStream inst;

    /**
     * The current logging level.
     */
    public static int level = 1;

    /**
     * Constructs a LogStream with the specified output stream.
     *
     * @param stream the output stream for logging
     */
    public LogStream(final PrintStream stream) {
        super(stream);
    }

    /**
     * Sets the logging level.
     *

        this.fileId = fileId;
    }

    /**
     * Constructs an SMB2 IOCTL request with output buffer
     * @param config the client configuration
     * @param controlCode the IOCTL control code
     * @param fileId the file identifier
     * @param outputBuffer the output buffer for the IOCTL operation
     */

pkg testing, method (*B) Output() io.Writer #59928
pkg testing, method (*F) Attr(string, string) #43936
pkg testing, method (*F) Output() io.Writer #59928
pkg testing, method (*T) Attr(string, string) #43936
pkg testing, method (*T) Output() io.Writer #59928
pkg testing, type TB interface, Attr(string, string) #43936
pkg testing, type TB interface, Output() io.Writer #59928

   * <<<.mvn/extensions.xml>>> containing {{{./core-extensions.html}a list of extensions}},

 * since 3.5.0, output is colorized by default, with color disabled in batch mode: see
   {{{/shared/maven-shared-utils/apidocs/org/apache/maven/shared/utils/logging/package-summary.html}styled message API}}

Você receberá uma response assim:

```json
{
  "description": "Some data",
  "content": "hello"
}
```

## Pydantic `bytes` para dados de saída { #pydantic-bytes-for-output-data }

Você também pode usar campos `bytes` com `ser_json_bytes` na configuração do modelo para dados de saída, e o Pydantic irá *serializar* os bytes como base64 ao gerar a response JSON.