this.successRate = successRate;
        }

        @Override
        public String toString() {
            return String.format("CircuitBreaker[%s] State=%s, Calls=%d, Success=%.2f%%, Rejected=%d", name, state, totalCalls,
                    successRate * 100, rejectedCalls);
        }
    }

    /**
     * Exception thrown when circuit breaker is open
     */

//// tab | Python 3.10+

```Python hl_lines="1"
{!> ../../docs_src/python_types/tutorial009_py310.py!}
```

////

Utiliser `str | None` au lieu de simplement `str` permettra à l'éditeur de vous aider à détecter des erreurs où vous supposeriez qu'une valeur est toujours un `str`, alors qu'elle pourrait en fait aussi être `None`.

### Classes en tant que types { #classes-as-types }

        // repeat the request (even non-idempotent ones.)
        if (!chain.retryOnConnectionFailure) {
          // The application layer has directed us not to retry the request.
          return null
        }

        val requestBody = userResponse.request.body
        if (requestBody != null && requestBody.isOneShot()) {
          return null
        }

	return nil
}

// healSequenceStart - this is the top-level background heal
// routine. It launches another go-routine that actually traverses
// on-disk data, checks and heals according to the selected
// settings. This go-routine itself, (1) monitors the traversal
// routine for completion, and (2) listens for external stop
// signals. When either event happens, it sets the finish status for
// the heal-sequence.

import java.util.Collections;
import java.util.Optional;
import java.util.Set;
import org.jspecify.annotations.NullUnmarked;
import org.junit.After;
import org.junit.Test;

/**
 * Abstract base class for testing directed {@link Network} implementations defined in this package.
 */
@NullUnmarked
public abstract class AbstractStandardDirectedNetworkTest extends AbstractNetworkTest {

  @After
  public void validateSourceAndTarget() {

  Scheduling hints allow the scheduler to retry scheduling Pods that were previously rejected by the VolumeRestriction plugin if the Pod is deleted and the deleted Pod conflicts with the existing volumes of the current Pod. ([#125279](https://github.com/kubernetes/kubernetes/pull/125279), [@HirazawaUi](https://github.com/HirazawaUi)) [SIG Scheduling and Storage]

/// note | Nota

O FastAPI saberá que o valor de `q` não é obrigatório por causa do valor padrão `= None`.

Ter `str | None` permitirá que seu editor lhe ofereça melhor suporte e detecte erros.

///

## Validação adicional { #additional-validation }

Vamos impor que, embora `q` seja opcional, sempre que for fornecido, seu comprimento não exceda 50 caracteres.

    //                                               -------
    /**
     * Display detailed view of a specific stemmer override item.
     * Shows read-only details of the selected item.
     *
     * @param dictId The dictionary ID
     * @param crudMode The CRUD mode (should be DETAILS)
     * @param id The ID of the stemmer override item to display

//// tab | Python 3.10+

```Python hl_lines="1"
{!> ../../docs_src/python_types/tutorial009_py310.py!}
```

////

Usar `str | None` en lugar de solo `str` te permitirá al editor ayudarte a detectar errores donde podrías estar asumiendo que un valor siempre es un `str`, cuando en realidad también podría ser `None`.

### Clases como tipos { #classes-as-types }

//// tab | Python 3.10+

```Python hl_lines="1"
{!> ../../docs_src/python_types/tutorial009_py310.py!}
```

////

Usar `str | None` em vez de apenas `str` permitirá que o editor o ajude a detectar erros em que você poderia estar assumindo que um valor é sempre um `str`, quando na verdade ele também pode ser `None`.

### Classes como tipos { #classes-as-types }