*
   * <p>Failure to follow this advice may result in non-deterministic behavior.
   *
   * <p>The returned table will be serializable if the specified table is serializable.
   *
   * @param table the table to be wrapped in a synchronized view
   * @return a synchronized view of the specified table
   * @since 22.0
   */
  @J2ktIncompatible // Synchronized

```Python
q: str | None = None
```

////

//// tab | Python 3.9+

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

////

Was wir tun werden, ist, dies mit `Annotated` zu wrappen, sodass es zu:

//// tab | Python 3.10+

```Python
q: Annotated[str | None] = None
```

////

//// tab | Python 3.9+

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

////

pkg syscall (freebsd-386), const TCP_VENDOR ideal-int
pkg syscall (freebsd-386), const WEXITED = 16
pkg syscall (freebsd-386), const WEXITED ideal-int
pkg syscall (freebsd-386), const WTRAPPED = 32
pkg syscall (freebsd-386), const WTRAPPED ideal-int
pkg syscall (freebsd-386), func Accept4(int, int) (int, Sockaddr, error)
pkg syscall (freebsd-386), func FcntlFlock(uintptr, int, *Flock_t) error

}\n}\n\n.collapsing {\n  position: relative;\n  height: 0;\n  overflow: hidden;\n  @include transition($transition-collapse);\n\n  &.width {\n    width: 0;\n    height: auto;\n    @include transition($transition-collapse-width);\n  }\n}\n","// The dropdown wrapper (`<div>`)\n.dropup,\n.dropright,\n.dropdown,\n.dropleft {\n  position: relative;\n}\n\n.dropdown-toggle {\n  white-space: nowrap;\n\n  // Generate the caret automatically\n  @include caret();\n}\n\n// The dropdown menu\n.dropdown-menu {\n  position:...

En déclarant les types de vos variables, cela permet aux différents outils comme les éditeurs de texte d'offrir un meilleur support.

Ce chapitre n'est qu'un **tutoriel rapide / rappel** sur les annotations de type Python.
Seulement le minimum nécessaire pour les utiliser avec **FastAPI** sera couvert... ce qui est en réalité très peu.

 *       collection. This is a stronger guarantee than that of {@link
 *       Collections#unmodifiableCollection}, whose contents change whenever the wrapped collection
 *       is modified.
 *   <li><b>Null-hostility.</b> This collection will never contain a null element.
 *   <li><b>Deterministic iteration.</b> The iteration order is always well-defined, depending on

    assertThat(callCount.get()).isEqualTo(2);
  }

  /**
   * On a concurrent computation that throws an unchecked exception, all threads should get the
   * (wrapped) exception, with the loader called only once. The result should not be cached (a later
   * request should call the loader again).
   */

import java.util.TreeSet;
import junit.framework.Test;
import junit.framework.TestCase;
import junit.framework.TestSuite;
import org.jspecify.annotations.NullUnmarked;

/**
 * Run collection tests on wrappers from {@link Multimaps}.
 *
 * @author Jared Levy
 */
@GwtIncompatible // suite // TODO(cpovirk): set up collect/gwt/suites version
@NullUnmarked
@AndroidIncompatible // test-suite builders

        assertNotNull(pooled2);
        assertNotSame(pooled1, pooled2); // Different PooledObject instances
        assertSame(pooled1.getObject(), pooled2.getObject()); // Same wrapped object
    }

    /**
     * Test factory configuration independence
     */
    public void test_factoryConfigurationIndependence() {
        // Each factory instance has independent configuration

Disons que vous déclarez le paramètre `q` comme ayant une longueur minimale de `3`, et une valeur par défaut étant `"fixedquery"` :

{* ../../docs_src/query_params_str_validations/tutorial005.py hl[7] *}

/// note | Rappel

Avoir une valeur par défaut rend le paramètre optionnel.

///

## Rendre ce paramètre requis