{!../../../docs_src/body/tutorial001.py!}
```

Tout comme pour la déclaration de paramètres de requête, quand un attribut de modèle a une valeur par défaut, il n'est pas nécessaire. Sinon, cet attribut doit être renseigné dans le corps de la requête. Pour rendre ce champ optionnel simplement, utilisez `None` comme valeur par défaut.

Par exemple, le modèle ci-dessus déclare un "objet" JSON (ou `dict` Python) tel que :

```JSON
{
    "name": "Foo",

	}
	// Validates list of all the testcases for returning valid errors.
	for i, testCase := range testCases {
		gotErr := reduceReadQuorumErrs(context.Background(), testCase.errs, testCase.ignoredErrs, 5)
		if gotErr != testCase.err {
			t.Errorf("Test %d : expected %s, got %s", i+1, testCase.err, gotErr)
		}
		gotNewErr := reduceWriteQuorumErrs(context.Background(), testCase.errs, testCase.ignoredErrs, 6)

	)

	switch {
	case volSrc != nil:
		if c.volumeLifecycleMode != storage.VolumeLifecycleEphemeral {
			return fmt.Errorf("unexpected volume mode: %s", c.volumeLifecycleMode)
		}
		if volSrc.FSType != nil {
			fsType = *volSrc.FSType
		}

		volAttribs = volSrc.VolumeAttributes

		if volSrc.NodePublishSecretRef != nil {
			secretName := volSrc.NodePublishSecretRef.Name
			ns := c.pod.Namespace

		Message: fmt.Sprintf("Cannot enforce AppArmor: %v", err),
	}
}

func isHTTPResponseError(err error) bool {
	if err == nil {
		return false
	}
	urlErr := &url.Error{}
	if !errors.As(err, &urlErr) {
		return false
	}
	return strings.Contains(urlErr.Err.Error(), "server gave HTTP response to HTTPS client")

		if err != nil {
			return false, err
		}

		healthCheckError = kmsPluginHealthzCheck.Check(req)
		return healthCheckError == nil, nil
	})
	if pollErr != nil {
		return fmt.Errorf("health check for new transformers failed, polling error %v: %w", pollErr, healthCheckError)
	}
	klog.V(2).InfoS("Health check succeeded")
	return nil

				if entityKeysInStorage.Contains(origKeys[i]) {
					// Ignore any deletion error.
					_, delErr := sys.PolicyDBSet(ctx, origKeys[i], "", stsUser, isGroup)
					if delErr != nil {
						logErr := fmt.Errorf("failed to delete extraneous LDAP DN mapping for `%s`: %w", origKeys[i], delErr)
						iamLogIf(ctx, logErr)
					}
				}
			}
		}

		// Replacing origKeys[0] with normKey in the policyMap

	O_WRONLY   = C.O_WRONLY
	O_NONBLOCK = C.O_NONBLOCK
	O_CREAT    = C.O_CREAT
	O_TRUNC    = C.O_TRUNC
	O_CLOEXEC  = C.O_CLOEXEC

	POLLIN  = C.POLLIN
	POLLOUT = C.POLLOUT
	POLLHUP = C.POLLHUP
	POLLERR = C.POLLERR

	PORT_SOURCE_FD    = C.PORT_SOURCE_FD
	PORT_SOURCE_ALERT = C.PORT_SOURCE_ALERT
	PORT_ALERT_UPDATE = C.PORT_ALERT_UPDATE
)

type SemT C.sem_t

type Sigset C.sigset_t
type StackT C.stack_t

		return errors.New("rpc: service already defined: " + sname)
	}
	return nil
}

// suitableMethods returns suitable Rpc methods of typ. It will log
// errors if logErr is true.
func suitableMethods(typ reflect.Type, logErr bool) map[string]*methodType {
	methods := make(map[string]*methodType)
	for m := 0; m < typ.NumMethod(); m++ {
		method := typ.Method(m)
		mtype := method.Type
		mname := method.Name

	_ volume.VolumeOptions) (volume.Mounter, error) {

	volSrc, pvSrc, err := getSourceFromSpec(spec)
	if err != nil {
		return nil, err
	}

	var (
		driverName   string
		volumeHandle string
		readOnly     bool
	)

	switch {
	case volSrc != nil:
		volumeHandle = makeVolumeHandle(string(pod.UID), spec.Name())
		driverName = volSrc.Driver
		if volSrc.ReadOnly != nil {
			readOnly = *volSrc.ReadOnly
		}

	if err != nil {
		return nil, err
	}
	defer syscall.CertFreeCertificateChain(topCtx)

	chain, topErr := verifyChain(c, topCtx, opts)
	if topErr == nil {
		chains = append(chains, chain)
	}

	if lqCtxCount := topCtx.LowerQualityChainCount; lqCtxCount > 0 {
		lqCtxs := unsafe.Slice(topCtx.LowerQualityChains, lqCtxCount)