# Concurrencia y async / await

Detalles sobre la sintaxis `async def` para *path operation functions* y algunos antecedentes sobre el código asíncrono, la concurrencia y el paralelismo.

## ¿Con prisa?

<abbr title="too long; didn't read"><strong>TL;DR:</strong></abbr>

Si estás usando paquetes de terceros que te dicen que los llames con `await`, como:

```Python
results = await some_library()
```

				t.Errorf("failed to find user, got error: %v", err)
			} else if len(users) != 2 {
				t.Errorf("should find 2 users, but got %d", len(users))
			}
			sg.Done()
		}()
	}
	sg.Wait()
}

func TestGenericsWithTransaction(t *testing.T) {
	ctx := context.Background()
	tx := DB.Begin()
	if tx.Error != nil {
		t.Fatalf("failed to begin transaction: %v", tx.Error)
	}

          return new FutureAsCancellable(immediateCancelledFuture());
        }
        // We reschedule ourselves with a lock held for two reasons. 1. we want to make sure that
        // cancel calls cancel on the correct future. 2. we want to make sure that the assignment
        // to currentFuture doesn't race with itself so that currentFuture is assigned in the
        // correct order.

				return
			}
			setN := humanize.Ordinal(setIdx + 1)
			rebalanceLogIf(ctx, fmt.Errorf("listing objects from %s set failed with %v", setN, err), "rebalance-listing-failed"+setN)
		}(setIdx)
	}

	wk.Wait()
	return nil
}

type rebalSaveOpts uint8

const (
	rebalSaveStats rebalSaveOpts = iota
	rebalSaveStoppedAt
)

failed command. {{- if .Values.configPathmc }} MC_CONFIG_DIR="{{ .Values.configPathmc }}" MC="/usr/bin/mc --insecure --config-dir ${MC_CONFIG_DIR}" {{- else }} MC="/usr/bin/mc --insecure" {{- end }} # connectToMinio # Use a check-sleep-check loop to wait for Minio service to be available connectToMinio() { SCHEME=$1 ATTEMPTS=0 ; LIMIT=29 ; # Allow 30 attempts set -e ; # fail if we can't read the keys. ACCESS=$(cat /config/rootUser) ; SECRET=$(cat /config/rootPassword) ; set +e ; # The connections to...

* Only wait for cache syncs once in NodeController ([#34851](https://github.com/kubernetes/kubernetes/pull/34851), [@ncdc](https://github.com/ncdc))
* NodeController waits for informer sync before doing anything ([#34809](https://github.com/kubernetes/kubernetes/pull/34809), [@gmarek](https://github.com/gmarek))

          return new FutureAsCancellable(immediateCancelledFuture());
        }
        // We reschedule ourselves with a lock held for two reasons. 1. we want to make sure that
        // cancel calls cancel on the correct future. 2. we want to make sure that the assignment
        // to currentFuture doesn't race with itself so that currentFuture is assigned in the
        // correct order.

                LOOKUP_TABLE.put(name, name);
                return null;
            }
            while (LOOKUP_TABLE.containsKey(name)) {
                try {
                    LOOKUP_TABLE.wait();
                } catch (final InterruptedException e) {}
            }
        }
        obj = getCachedAddress(name);
        if (obj == null) {
            synchronized (LOOKUP_TABLE) {

- Add --for=create option to kubectl wait ([#125868](https://github.com/kubernetes/kubernetes/pull/125868), [@soltysh](https://github.com/soltysh)) [SIG CLI and Testing]

* kubectl port-forward now allows using resource name (e.g., deployment/www) to select a matching pod, as well as the use of --pod-running-timeout to wait until at least one pod is running. ([#59705](https://github.com/kubernetes/kubernetes/pull/59705), [@phsiao](https://github.com/phsiao))