{* ../../docs_src/query_params/tutorial002.py hl[9] *}

Ici, le paramètre `q` sera optionnel, et aura `None` comme valeur par défaut.

/// check | "Remarque"

On peut voir que **FastAPI** est capable de détecter que le paramètre de chemin `item_id` est un paramètre de chemin et que `q` n'en est pas un, c'est donc un paramètre de requête.

///

/// note

**FastAPI** saura que `q` est optionnel grâce au `=None`.

                    label selector matches all objects. A null label selector matches
                    no objects.
                  properties:
                    matchExpressions:
                      description: matchExpressions is a list of label selector requirements.
                        The requirements are ANDed.
                      items:
                        description: A label selector requirement is a selector that

			case err := <-errChan:
				if err == nil {
					t.Fatal("invalid configuration detected")
				}
				t.Fatal(err)
			case <-time.After(5 * time.Second):
				t.Fatal("timed out waiting for isReady to be set to true")
			}

			// Change SA token
			if len(c.saNewFilename) > 0 {
				t.Log("Expecting detect changes to the SA token")

```yaml
apiVersion: security.istio.io/v1
kind: PeerAuthentication
metadata:
  name: strict-and-permissive-mtls
spec:
  selector:
    matchLabels:
      app: a
  mtls:
    mode: STRICT
  portLevelMtls:
    9090:
      mode: PERMISSIVE
```

will be translated into this `Authorization`:

```yaml
action: DENY
groups:

  
  After:
  `FROM --platform=linux/${arch} ${base_image}` ([#94552](https://github.com/kubernetes/kubernetes/pull/94552), [@justaugustus](https://github.com/justaugustus)) [SIG Release]
- Bump node-problem-detector version to v0.8.5 to fix OOM detection in with Linux kernels 5.1+ ([#96716](https://github.com/kubernetes/kubernetes/pull/96716), [@tosi3k](https://github.com/tosi3k)) [SIG Cloud Provider, Scalability and Testing]

			if err != nil {
				return err
			}

			matchingServices := make([]corev1.Service, 0, len(svcs.Items))
			for _, svc := range svcs.Items {
				if len(svc.Spec.Selector) > 0 {
					svcSelector := klabels.SelectorFromSet(svc.Spec.Selector)
					if svcSelector.Matches(podLabels) {
						matchingServices = append(matchingServices, svc)
					}
				}
			}
			// Validate Istio's "Service association" requirement

                type: object
            type: object
            x-kubernetes-validations:
            - message: portLevelMtls requires selector
              rule: (has(self.selector) && has(self.selector.matchLabels) && self.selector.matchLabels.size()
                > 0) || !has(self.portLevelMtls)
          status:
            properties:
              conditions:

  optional k8s.io.apimachinery.pkg.apis.meta.v1.LabelSelector selector = 1;

  // An object that describes the pod that will be created.
  // The DaemonSet will create exactly one copy of this pod on every node
  // that matches the template's node selector (or on every node if no node
  // selector is specified).
  // The only allowed template.spec.restartPolicy value is "Always".

            Specifies that this profile will be activated when a matching JDK is detected.
          ]]></description>
        </field>
        <field>
          <name>os</name>
          <version>1.0.0</version>
          <description><![CDATA[
            Specifies that this profile will be activated when matching OS attributes are detected.
          ]]></description>
          <association>

		// our desired state
		err := in.sleepWatchInstall(ctx, installedBins)
		if err != nil {
			installLog.Errorf("error watching node CNI config: %v", err)
			return err
		}
		installLog.Info("detected changes to the node-level CNI setup, checking to see if configs or binaries need redeploying")
		// We don't support (or want) to silently (re)deploy any binaries that were not in the initial "snapshot"