## Valores predefinidos

Si tienes una *operación de path* que recibe un *parámetro de path* pero quieres que los valores posibles del *parámetro de path* sean predefinidos puedes usar un <abbr title="Enumeration">`Enum`</abbr> estándar de Python.

### Crea una clase `Enum`

Importa `Enum` y crea una sub-clase que herede desde `str` y desde `Enum`.

				db.Statement.Context, db.Statement.SQL.String(), db.Statement.Vars...,
			)
			if db.AddError(err) == nil {
				defer func() {
					db.AddError(rows.Close())
				}()
				gorm.Scan(rows, db, mode)
			}

			return
		}

		result, err := db.Statement.ConnPool.ExecContext(
			db.Statement.Context, db.Statement.SQL.String(), db.Statement.Vars...,
		)
		if err != nil {
			db.AddError(err)

		controllers.WithReconciler(c.Reconcile),
		controllers.WithMaxAttempts(5))
	c.pods.AddEventHandler(controllers.ObjectHandler(c.queue.AddObject))

	return c, nil
}

func (c *Controller) Run(stop <-chan struct{}) {
	kube.WaitForCacheSync("repair controller", stop, c.pods.HasSynced)
	c.queue.Run(stop)
	c.pods.ShutdownHandlers()
}

func (c *Controller) Reconcile(key types.NamespacedName) error {

type Config map[string]map[string]KVS

// DelFrom - deletes all keys in the input reader.
func (c Config) DelFrom(r io.Reader) error {
	scanner := bufio.NewScanner(r)
	for scanner.Scan() {
		// Skip any empty lines, or comment like characters
		text := scanner.Text()
		if text == "" || strings.HasPrefix(text, KvComment) {
			continue
		}
		if err := c.DelKVS(text); err != nil {
			return err

<div style="text-align: right; margin-right: 10%;">Kabir Khan - <strong>Microsoft</strong> <a href="https://github.com/fastapi/fastapi/pull/26" target="_blank"><small>(ref)</small></a></div>

---

transition_workers              (number)    set the number of transition workers (default: '100')
stale_uploads_expiry            (duration)  set to expire stale multipart uploads older than this values (default: '24h')
stale_uploads_cleanup_interval  (duration)  set to change intervals when stale multipart uploads are expired (default: '6h')

// The entry not chosen will be discarded.
// If the context is canceled the function will return the error,
// otherwise the function will return nil.
func mergeEntryChannels(ctx context.Context, in []chan metaCacheEntry, out chan<- metaCacheEntry, readQuorum int) error {
	defer xioutil.SafeClose(out)
	top := make([]*metaCacheEntry, len(in))
	nDone := 0
	ctxDone := ctx.Done()

	// Use simpler forwarder.
	if len(in) == 1 {

*----+------+------+
| <<<settings.*>>> | Local user settings (see {{{../maven-settings/settings.html}settings reference}}) | <<<$\{settings.localRepository\}>>> |
*----+------+------+
| <<<changelist>>> \
<<<revision>>> \
<<<sha1>>> | CI friendly placeholders for the project version (see {{{/maven-ci-friendly.html}Maven CI Friendly Versions}}) | <<<1.0.0-$\{changelist\}-SNAPSHOT>>> |
*----+------+------+


**  Notice

import java.util.Set;
import java.util.SortedSet;

/**
 * Generators of different types of sets and derived collections from sets.
 *
 * @author Kevin Bourrillion
 * @author Jared Levy
 * @author Hayward Chan
 */
@GwtCompatible(emulated = true)
@ElementTypesAreNonnullByDefault
public class SetGenerators {

  public static class ImmutableSetCopyOfGenerator extends TestStringSetGenerator {
    @Override

import java.util.Set;
import java.util.SortedSet;

/**
 * Generators of different types of sets and derived collections from sets.
 *
 * @author Kevin Bourrillion
 * @author Jared Levy
 * @author Hayward Chan
 */
@GwtCompatible(emulated = true)
@ElementTypesAreNonnullByDefault
public class SetGenerators {

  public static class ImmutableSetCopyOfGenerator extends TestStringSetGenerator {
    @Override