* Validar que existe un `item_id` en el path para requests usando `GET` y `PUT`.
* Validar que el `item_id` es del tipo `int` para requests de tipo `GET` y `PUT`.
    * Si no lo es, el cliente verá un mensaje de error útil y claro.
* Revisar si existe un query parameter opcional llamado `q` (cómo en `http://127.0.0.1:8000/items/foo?q=somequery`) para requests de tipo `GET`.
    * Como el parámetro `q` fue declarado con `= None` es opcional.

	server := getFakeDP(fs, client.Kube())

	handlers := setupHandlers(ctx, client, server, "istio-system")
	client.RunAndWait(ctx.Done())
	disabledPod, err := handlers.GetPodIfAmbient(pod.Name, "what")

	assert.Error(t, err)
	assert.Equal(t, disabledPod, nil)
}

func TestExistingPodAddedWhenItPreExists(t *testing.T) {
	setupLogging()
	NodeName = "testnode"

	mt := monitortest.New(t)

  // DisruptionAllowed condition. The following are known values for the reason field
  // (additional reasons could be added in the future):
  // - SyncFailed: The controller encountered an error and wasn't able to compute
  //               the number of allowed disruptions. Therefore no disruptions are
  //               allowed and the status of the condition will be False.

				"application/oda",
				"application/oebps-package+xml",
				"application/ogg",
				"application/kate",
				"application/onenote",
				"application/parityfec",
				"application/patch-ops-error+xml",
				"application/pgp-encrypted",
				"application/pgp-keys",
				"application/pgp-signature",
				"application/pics-rules",
				"application/pidf+xml",
				"application/pidf-diff+xml",

{!../../docs_src/python_types/tutorial009c.py!}
```

Tham số `name` được định nghĩa là `Optional[str]`, nhưng nó **không phải là tùy chọn**, bạn không thể gọi hàm mà không có tham số:

```Python
say_hi()  # Oh, no, this throws an error! 😱
```

Tham số `name` **vẫn được yêu cầu** (không phải là *tùy chọn*) vì nó không có giá trị mặc định. Trong khi đó, `name` chấp nhận `None` như là giá trị:

```Python

<setting id="org.eclipse.wst.jsdt.core.formatter.brace_position_for_array_initializer" value="end_of_line"/>
<setting id="org.eclipse.wst.jsdt.core.compiler.problem.assertIdentifier" value="error"/>
<setting id="org.eclipse.wst.jsdt.core.formatter.insert_space_after_comma_in_constructor_declaration_throws" value="insert"/>
<setting id="org.eclipse.wst.jsdt.core.formatter.insert_space_before_colon_in_assert" value="insert"/>

n){for(var i in n)if(Object.prototype.hasOwnProperty.call(n,i)){var o=n[i],a=e[i],s=a&&d.isElement(a)?"element":null===(l=a)||"undefined"==typeof l?""+l:{}.toString.call(l).match(/\s([a-z]+)/i)[1].toLowerCase();if(!new RegExp(o).test(s))throw new Error(t.toUpperCase()+': Option "'+i+'" provided type "'+s+'" but expected type "'+o+'".')}var l},findShadowRoot:function(t){if(!document.documentElement.attachShadow)return null;if("function"==typeof t.getRootNode){var e=t.getRootNode();return e instanceof...

        suggester.indexer().indexFromDocument(() -> reader, 1000, 100).then(response -> {
            numObInputDoc.set(response.getNumberOfInputDocs());
            latch.countDown();
        }).error(t -> {
            t.printStackTrace();
            latch.countDown();
            fail();
        });
        latch.await();
        assertEquals(num, numObInputDoc.get());

            connectionMonitorTask.cancel();
        }
        if (httpClient != null) {
            try {
                httpClient.close();
            } catch (final IOException e) {
                logger.error("Failed to close httpClient.", e);
            }
            httpClient = null;
            if (clientConnectionManager != null) {
                clientConnectionManager.shutdown();
            }
        }

      Cut<C> newLower = (lowerCmp >= 0) ? lowerBound : connectedRange.lowerBound;
      Cut<C> newUpper = (upperCmp <= 0) ? upperBound : connectedRange.upperBound;

      // create() would catch this, but give a confusing error message
      checkArgument(
          newLower.compareTo(newUpper) <= 0,
          "intersection is undefined for disconnected ranges %s and %s",
          this,
          connectedRange);