TF_CAPI_EXPORT extern void TFE_ContextEndStep(TFE_Context* ctx);

#ifdef __cplusplus
} /* end extern "C" */
#endif

#ifdef __cplusplus
// A workaround to ease conversion to and from numpy objects and
// TFE_TensorHandle's.
//
// TODO(ashankar): Figure out an alternative scheme that precludes the need for
// these API-boundary breaking methods.
namespace tensorflow {
class Tensor;

ここでは、 `item_id` は `int` として宣言されています。

/// check | 確認

これにより、関数内でのエディターサポート (エラーチェックや補完など) が提供されます。

///

## データ<dfn title="別名: シリアライズ、パース、マーシャリング">変換</dfn> { #data-conversion }

この例を実行し、ブラウザで [http://127.0.0.1:8000/items/3](http://127.0.0.1:8000/items/3) を開くと、次のレスポンスが表示されます:

```JSON
{"item_id":3}
```

/// check | 確認

channel is closed and empty.
</p>


<h3 id="Conversions">Conversions</h3>

<p>
A conversion changes the <a href="#Types">type</a> of an expression
to the type specified by the conversion.
A conversion may appear literally in the source, or it may be <i>implied</i>
by the context in which an expression appears.
</p>

<p>
An <i>explicit</i> conversion is an expression of the form <code>T(x)</code>

     * Handles Float and String types, returning 0.0f for unsupported types.
     *
     * @param value the object to convert to float
     * @return float representation of the value, or 0.0f if conversion fails
     */
    protected float toFloat(final Object value) {
        if (value instanceof final Float f) {
            return f;
        }
        if (value instanceof final String s) {

client = TestClient(app)


def test_route_converters_int():
    # Test integer conversion
    response = client.get("/int/5")
    assert response.status_code == 200, response.text
    assert response.json() == {"int": 5}
    assert app.url_path_for("int_convertor", param=5) == "/int/5"  # type: ignore


def test_route_converters_float():
    # Test float conversion
    response = client.get("/float/25.5")

///

/// info

Pour déclarer des en-têtes, vous devez utiliser `Header`, sinon les paramètres seraient interprétés comme des paramètres de requête.

///

## Conversion automatique { #automatic-conversion }

`Header` offre un peu de fonctionnalité supplémentaire par rapport à `Path`, `Query` et `Cookie`.

### [Marshmallow](https://marshmallow.readthedocs.io/en/stable/) { #marshmallow }

            Map<Path, Document> pomMap = new HashMap<>();
            pomMap.put(Paths.get("pom.xml"), document);

            // Create context with --model-version=4.1.0 option to trigger module conversion
            UpgradeOptions options = mock(UpgradeOptions.class);
            when(options.modelVersion()).thenReturn(Optional.of("4.1.0"));
            when(options.all()).thenReturn(Optional.empty());

            "type": "extra_forbidden",
            "loc": ["header", "tool"],
            "msg": "Extra inputs are not permitted",
            "input": "plumbus",
        }
    ]
}
```

## Desactivar la conversión de guiones bajos { #disable-convert-underscores }

De la misma forma que con los parámetros de header normales, cuando tienes caracteres de guion bajo en los nombres de los parámetros, se **convierten automáticamente en guiones**.

 *       {@link #last})
 *   <li>query methods which answer questions about the {@code FluentIterable}'s contents (for
 *       example {@link #anyMatch})
 *   <li>conversion methods which copy the {@code FluentIterable}'s contents into a new collection
 *       or array (for example {@link #toList})
 * </ul>
 *