It uses Marshmallow underneath to do the data validation. And it was created by the same developers.

It's a great tool and I have used it a lot too, before having **FastAPI**.

/// info

Webargs was created by the same Marshmallow developers.

///

/// check | Inspired **FastAPI** to

Have automatic validation of incoming request data.

///

        <exclude>**/.DS_Store</exclude>
        <exclude>**/build/**</exclude>
      </excludes>
    </fileSet>
    <fileSet>
      <directory>${project.build.directory}/maven-shared-archive-resources/META-INF</directory>
      <outputDirectory>/</outputDirectory>
      <includes>
        <include>DEPENDENCIES</include>
        <!-- exclude the license and notice as they are not as accurate as the ones from above -->

 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
package jcifs.internal.smb2.ioctl;

import jcifs.Encodable;
import jcifs.internal.util.SMBUtil;

/**
 * SMB2 Validate Negotiate Info request data structure. This structure is used to validate
 * that the negotiated SMB2 dialect matches what was originally negotiated.
 *
 * @author mbechler
 *
 */

        final StringBuilder buf = new StringBuilder(100);
        buf.append("{\"@timestamp\":\"").append(valueMap.remove("time")).append('"');
        buf.append(",\"log.level\":\"INFO\"");
        buf.append(",\"ecs.version\":\"").append(ecsVersion).append('"');
        buf.append(",\"service.name\":\"").append(ecsServiceName).append('"');

## Descrição da resposta

Você pode especificar a descrição da resposta com o parâmetro `response_description`:

{* ../../docs_src/path_operation_configuration/tutorial005.py hl[21] *}

/// info | Informação

Note que `response_description` se refere especificamente à resposta, a `description` se refere à *operação de rota* em geral.

///

/// check

			}
			ctx, done := context.WithTimeout(ctx, 2*time.Second)
			defer done()

			return loadDataUsageFromBackend(ctx, objAPI)
		},
	)
}

// GetBucketUsageInfo return bucket usage info for a given bucket
func (sys *BucketQuotaSys) GetBucketUsageInfo(ctx context.Context, bucket string) BucketUsageInfo {
	sys.Init(newObjectLayerFn())

	dui, err := bucketStorageCache.GetWithCtx(ctx)

        this.channel = Smb2Constants.SMB2_CHANNEL_RDMA_V1;
    }

    /**
     * Get RDMA channel information
     *
     * @return RDMA channel info, or null if not using RDMA
     */
    public RdmaChannelInfo getRdmaChannelInfo() {
        return rdmaChannelInfo;
    }

    /**
     * Get the read length
     *
     * @return read length in bytes

}

func (d *disconnectReader) Close() error {
	d.mu.Lock()
	d.r = nil
	d.mu.Unlock()
	return nil
}

func untar(ctx context.Context, r io.Reader, putObject func(reader io.Reader, info os.FileInfo, name string) error, o untarOptions) error {
	bf := bufio.NewReader(r)
	switch f := detect(bf); f {
	case formatGzip:
		gz, err := gzip.NewReader(bf)
		if err != nil {
			return err
		}

    private SID[] extraSids;
    private int userAccountControl;
    private int userFlags;

    /**
     * Constructs a PAC logon information object from raw PAC data.
     * @param data the raw PAC logon info buffer data
     * @throws PACDecodingException if the data is malformed or invalid
     */
    public PacLogonInfo(final byte[] data) throws PACDecodingException {
        try {

```

... rend le paramètre optionnel, et est donc équivalent à :

```Python
q: Union[str, None] = None
```

Mais déclare explicitement `q` comme étant un paramètre de requête.

/// info

Gardez à l'esprit que la partie la plus importante pour rendre un paramètre optionnel est :

```Python
= None
```

ou :

```Python
= Query(None)
```