optional string name = 1;

  // selector is the string-encoded form of a standard kubernetes label selector for the given metric
  // When set, it is passed as an additional parameter to the metrics server for more specific metrics scoping.
  // When unset, just the metricName will be used to gather metrics.
  // +optional
  optional k8s.io.apimachinery.pkg.apis.meta.v1.LabelSelector selector = 2;
}

```Python hl_lines="9"
{!../../docs_src/query_params_str_validations/tutorial002.py!}
```

Note que substituímos o valor padrão de `None` para `Query(default=None)`, o primeiro parâmetro de `Query` serve para o mesmo propósito: definir o valor padrão do parâmetro.

Então:

```Python
q: Union[str, None] = Query(default=None)
```

...Torna o parâmetro opcional, da mesma maneira que:

```Python

	requestsCount: make(map[string]struct {
		success int64
		failure int64
	}),
	histogram: prometheus.NewHistogramVec(prometheus.HistogramOpts{
		Name:    "tier_ttlb_seconds",
		Help:    "Time taken by requests served by warm tier",
		Buckets: []float64{0.01, 0.1, 1, 2, 5, 10, 60, 5 * 60, 15 * 60, 30 * 60},
	}, []string{"tier"}),
}

func (t *tierMetrics) Observe(tier string, dur time.Duration) {

     * place. For example at the time of this writing the readXxxWireFormat
     * for requests and the writeXxxWireFormat for responses are not implemented
     * and simply return 0. These would need to be completed for a server
     * implementation.
     */

    protected static final short SMB2_NEGOTIATE = 0x00;
    protected static final short SMB2_SESSION_SETUP = 0x01;
    protected static final short SMB2_LOGOFF = 0x02;

	"github.com/minio/minio/internal/config"
	"github.com/minio/pkg/v3/ellipses"
	"github.com/minio/pkg/v3/env"
)

// This file implements and supports ellipses pattern for
// `minio server` command line arguments.

// Endpoint set represents parsed ellipses values, also provides
// methods to get the sets of endpoints.
type endpointSet struct {
	argPatterns []ellipses.ArgPattern

The important thing to keep in mind is that the `sub` key should have a unique identifier across the entire application, and it should be a string.

## Check it

Run the server and go to the docs: <a href="http://127.0.0.1:8000/docs" class="external-link" target="_blank">http://127.0.0.1:8000/docs</a>.

You'll see the user interface like:

<img src="/img/tutorial/security/image07.png">

        options.addOption(Option.builder(ENCRYPT_PASSWORD)
                .longOpt("encrypt-password")
                .hasArg()
                .optionalArg(true)
                .desc("Encrypt server password")
                .build());
        options.addOption(Option.builder(THREADS)
                .longOpt("threads")
                .hasArg()

///

## Abhängigkeiten mit `yield`, `HTTPException` und Hintergrundtasks

/// warning | "Achtung"

# limitations under the License.
# ==============================================================================
setup_file() {
    bazel version  # Start the bazel server
}

# Do a bazel query specifically for the licenses checker. It searches for
# targets matching the provided query, which start with // or @ but not
# //tensorflow (so it looks for //third_party, //external, etc.), and then

        }
    },
}

status_code_ranges: Dict[str, str] = {
    "1XX": "Information",
    "2XX": "Success",
    "3XX": "Redirection",
    "4XX": "Client Error",
    "5XX": "Server Error",
    "DEFAULT": "Default Response",
}


def get_openapi_security_definitions(
    flat_dependant: Dependant,
) -> Tuple[Dict[str, Any], List[Dict[str, Any]]]:
    security_definitions = {}