Ein Beispiel aus der offiziellen Pydantic Dokumentation:

{* ../../docs_src/python_types/tutorial011_py310.py *}

/// info | Info

Um mehr über [Pydantic zu erfahren, schauen Sie sich dessen Dokumentation an](https://docs.pydantic.dev/).

///

**FastAPI** basiert vollständig auf Pydantic.

Der wesentliche Punkt ist, dass der `sub`-Schlüssel in der gesamten Anwendung eine eindeutige Kennung haben sollte, und er sollte ein String sein.

## Es testen { #check-it }

Führen Sie den Server aus und gehen Sie zur Dokumentation: [http://127.0.0.1:8000/docs](http://127.0.0.1:8000/docs).

Die Benutzeroberfläche sieht wie folgt aus:

I tested several ideas in the most popular Python editors: PyCharm, VS Code, Jedi based editors.

By the last [Python Developer Survey](https://www.jetbrains.com/research/python-developers-survey-2018/#development-tools), that covers about 80% of the users.

    * Um exemplo é `404`, para uma resposta "Não encontrado".
    * Para erros genéricos do cliente, você pode usar apenas `400`.
* `500 - 599` são para erros do servidor. Você quase nunca os usa diretamente. Quando algo der errado em alguma parte do código do seu aplicativo ou servidor, ele retornará automaticamente um desses códigos de status.

/// tip | Dica

 * limitations under the License.
 */

package com.google.common.collect.testing;

import com.google.common.annotations.GwtCompatible;
import java.util.Iterator;

/**
 * Creates iterators to be tested.
 *
 * @param <E> the element type of the iterator.
 * @author George van den Driessche
 */
@GwtCompatible
public interface TestIteratorGenerator<E> {
  Iterator<E> get();

import static org.mockito.Mockito.when;

import java.lang.reflect.Field;
import java.lang.reflect.Method;

import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.mockito.Mock;
import org.mockito.MockitoAnnotations;

import jcifs.Configuration;
import jcifs.internal.smb1.ServerMessageBlock;

 *
 * @author Ben Yu
 */

@NullUnmarked
public class PackageSanityTests extends AbstractPackageSanityTests {
  public PackageSanityTests() {
    publicApiOnly(); // Many package-private classes are tested through the public API.
    setDefault(DiscreteDomain.class, DiscreteDomain.integers());
  }

import java.util.Collection;
import org.jspecify.annotations.NullMarked;
import org.jspecify.annotations.Nullable;

/**
 * Creates collections, containing sample elements, to be tested.
 *
 * @author Kevin Bourrillion
 */
@GwtCompatible
@NullMarked
public interface TestCollectionGenerator<E extends @Nullable Object>

                "flags should be DCERPC_FIRST_FRAG | DCERPC_LAST_FRAG");
        // Verify that the super constructor was called with the correct handle.
        // This is implicitly tested by the object being created without error and
        // the fields set by the constructor being correct.
    }

import java.util.Collection;
import org.jspecify.annotations.NullMarked;
import org.jspecify.annotations.Nullable;

/**
 * Creates collections, containing sample elements, to be tested.
 *
 * @author Kevin Bourrillion
 */
@GwtCompatible
@NullMarked
public interface TestCollectionGenerator<E extends @Nullable Object>