{* ../../docs_src/body/tutorial001.py hl[18] *}

...et déclarez que son type est le modèle que vous avez créé : `Item`.

## Résultats

En utilisant uniquement les déclarations de type Python, **FastAPI** réussit à :

* Lire le contenu de la requête en tant que JSON.
* Convertir les types correspondants (si nécessaire).
* Valider la donnée.

///

## Usar `Annotated` en el tipo del parámetro `q` { #use-annotated-in-the-type-for-the-q-parameter }

¿Recuerdas que te dije antes que `Annotated` puede usarse para agregar metadatos a tus parámetros en la [Introducción a Tipos de Python](../python-types.md#type-hints-with-metadata-annotations){.internal-link target=_blank}?

Ahora es el momento de usarlo con FastAPI. 🚀

## **Typer**, the FastAPI of CLIs

<a href="https://typer.tiangolo.com" target="_blank"><img src="https://typer.tiangolo.com/img/logo-margin/logo-margin-vector.svg" style="width: 20%;"></a>

If you are building a <abbr title="Command Line Interface">CLI</abbr> app to be used in the terminal instead of a web API, check out <a href="https://typer.tiangolo.com/" class="external-link" target="_blank">**Typer**</a>.

      if (types.length > 0 && mayNeedHiddenThis()) {
        Class<?>[] rawParamTypes = constructor.getParameterTypes();
        if (types.length == rawParamTypes.length
            && rawParamTypes[0] == getDeclaringClass().getEnclosingClass()) {
          // first parameter is the hidden 'this'
          return Arrays.copyOfRange(types, 1, types.length);
        }
      }
      return types;

 * (also known as a MIME Type or Content Type). This class also supports the concept of media ranges
 * <a href="http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.1">defined by HTTP/1.1</a>.
 * As such, the {@code *} character is treated as a wildcard and is used to represent any acceptable
 * type or subtype value. A media type may not have wildcard type with a declared subtype. The

            }

            final byte[] type1 = new byte[size];
            int pos = 0;

            System.arraycopy(NTLMSSP_SIGNATURE, 0, type1, 0, NTLMSSP_SIGNATURE.length);
            pos += NTLMSSP_SIGNATURE.length;

            writeULong(type1, pos, NTLMSSP_TYPE1);
            pos += 4;

            writeULong(type1, pos, flags);
            pos += 4;

    /**
     * Default constructor.
     */
    public LabelTypeService() {
        super();
    }

    /**
     * Get a list of label types.
     *
     * @param labelTypePager The pager for label types.
     * @return A list of label types.
     */
    public List<LabelType> getLabelTypeList(final LabelTypePager labelTypePager) {

{* ../../docs_src/response_model/tutorial003_04_py310.py hl[8] *}

...this fails because the type annotation is not a Pydantic type and is not just a single `Response` class or subclass, it's a union (any of the two) between a `Response` and a `dict`.

     *
     * @param type
     *            the type
     * @param map
     *            a {@link Map} with type variables as keys and type arguments as values for the parameterized type
     * @return a {@link ParameterizedClassDesc} representing the type
     */
    protected static ParameterizedClassDesc createParameterizedClassDesc(final Type type, final Map<TypeVariable<?>, Type> map) {

      }

      private /*static*/ <S> S doConvert(TypeToken<S> type) {
        return checkNotNull(getDefaultValue(type));
      }
    };
  }

  private static TypeToken<?> getFirstTypeParameter(Type type) {
    if (type instanceof ParameterizedType) {
      return TypeToken.of(((ParameterizedType) type).getActualTypeArguments()[0]);
    } else {
      return TypeToken.of(Object.class);
    }