### Top-level application { #top-level-application }

First, create the main, top-level, **FastAPI** application, and its *path operations*:

{* ../../docs_src/sub_applications/tutorial001_py39.py hl[3, 6:8] *}

### Sub-application { #sub-application }

Then, create your sub-application, and its *path operations*.

	if err != nil {
		t.Fatalf("Failed to decode master key: %v", err)
	}
	KMS, err := kms.NewBuiltin("my-key", key)
	if err != nil {
		t.Fatalf("Failed to create KMS: %v", err)
	}

	for i, test := range encryptDecryptTests {
		ciphertext, err := Encrypt(KMS, bytes.NewReader(test.Data), test.Context)
		if err != nil {
			t.Fatalf("Test %d: failed to encrypt stream: %v", i, err)

			BaseDir:      pathNames[i%paths],
			Prefix:       "",
			FilterPrefix: "",
			Marker:       "",
			Limit:        0,
			AskDisks:     "strict",
			Recursive:    false,
			Separator:    slashSeparator,
			Create:       true,
		})
	}
	b.ReportAllocs()

	for i := 0; b.Loop(); i++ {
		bm.findCache(listPathOptions{
			ID:           mustGetUUID(),
			Bucket:       "",
			BaseDir:      pathNames[i%paths],

	if !ok {
		t.Fatal("Unexpected object layer detected", reflect.TypeOf(obj))
	}

	// Tests for Erasure object layer initialization.

	// Create temporary backend for the test server.
	nDisks = 16
	disks, err = getRandomDisks(nDisks)
	if err != nil {
		t.Fatal("Failed to create drives for the backend")
	}
	defer removeRoots(disks)

	obj, err = newObjectLayer(ctx, mustGetPoolEndpoints(0, disks...))
	if err != nil {

### Crear una clase `Enum` { #create-an-enum-class }

Importa `Enum` y crea una subclase que herede de `str` y de `Enum`.

## Cómo se ve { #how-it-looks }

Primero solo usemos el código y veamos cómo funciona, y luego volveremos para entender qué está sucediendo.

## Crea `main.py` { #create-main-py }

Copia el ejemplo en un archivo `main.py`:

{* ../../docs_src/security/tutorial001_an_py39.py *}

## Ejecútalo { #run-it }

/// info | Información

		switch msgp.UnsafeString(field) {
		case "Name":
			z.Name, err = dc.ReadString()
			if err != nil {
				err = msgp.WrapError(err, "Name")
				return
			}
		case "Created":
			z.Created, err = dc.ReadTime()
			if err != nil {
				err = msgp.WrapError(err, "Created")
				return
			}
		case "LockEnabled":
			z.LockEnabled, err = dc.ReadBool()
			if err != nil {
				err = msgp.WrapError(err, "LockEnabled")
				return
			}

      level = DeprecationLevel.ERROR,
    )
    fun body(): RequestBody = body

    companion object {
      @JvmStatic
      fun create(body: RequestBody): Part = create(null, body)

      @JvmStatic
      fun create(
        headers: Headers?,
        body: RequestBody,
      ): Part {
        require(headers?.get("Content-Type") == null) { "Unexpected header: Content-Type" }

Examples:

    Source (English):

        «««
        ## Create a Project { #create-a-project }
        »»»

    Translate with (German):

        «««
        ## Ein Projekt erstellen { #create-a-project }
        »»»

    Do NOT translate with (German):

        «««
        ## Erstellen Sie ein Projekt { #create-a-project }
        »»»

    Source (English):

        «««

 * <ul>
 *   <li>In-memory caching using a byte array</li>
 *   <li>File-based caching using a File object</li>
 * </ul>
 *
 * <p>When an instance of ContentCache is created with a byte array, the content is cached in memory.
 * When an instance is created with a File object, the content is cached in the specified file.
 *
 * <p>The {@code close()} method deletes the file if the content is cached in a file.
 *