///

### Bước 5: Nội dung trả về

{* ../../docs_src/first_steps/tutorial001.py hl[8] *}

Bạn có thể trả về một `dict`, `list`, một trong những giá trị đơn như `str`, `int`,...

Bạn cũng có thể trả về Pydantic model (bạn sẽ thấy nhiều hơn về nó sau).

### Обновление данных героя с помощью `HeroUpdate`

Мы можем **обновить данные героя**. Для этого мы воспользуемся HTTP методом `PATCH`.

### Update a Hero with `HeroUpdate` { #update-a-hero-with-heroupdate }

We can **update a hero**. For this we use an HTTP `PATCH` operation.

And in the code, we get a `dict` with all the data sent by the client, **only the data sent by the client**, excluding any values that would be there just for being the default values. To do it we use `exclude_unset=True`. This is the main trick. 🪄

Você pode retorná-la diretamente.

Ela aceita os seguintes parâmetros:

* `content` - Uma sequência de caracteres (`str`) ou `bytes`.
* `status_code` - Um código de status HTTP do tipo `int`.
* `headers` - Um dicionário `dict` de strings.
* `media_type` - Uma `str` informando o media type. E.g. `"text/html"`.

      } else {
        fileSystem.atomicMove(journalFileBackup, journalFile)
      }
    }

    civilizedFileSystem = fileSystem.isCivilized(journalFileBackup)

    // Prefer to pick up where we left off.
    if (fileSystem.exists(journalFile)) {
      try {
        readJournal()
        processJournal()
        initialized = true
        return

func TestCommonParities(t *testing.T) {
	// This test uses two FileInfo values that represent the same object but
	// have different parities. They occur in equal number of drives, but only
	// one has read quorum. commonParity should pick the parity corresponding to
	// the FileInfo which has read quorum.
	fi1 := FileInfo{
		Volume:         "mybucket",
		Name:           "myobject",
		VersionID:      "",
		IsLatest:       true,

### Actualizar un Hero con `HeroUpdate`

Podemos **actualizar un héroe**. Para esto usamos una operación HTTP `PATCH`.

Y en el código, obtenemos un `dict` con todos los datos enviados por el cliente, **solo los datos enviados por el cliente**, excluyendo cualquier valor que estaría allí solo por ser valores por defecto. Para hacerlo usamos `exclude_unset=True`. Este es el truco principal. 🪄

		err = reduceWriteQuorumErrs(ctx, errs, objectOpIgnoredErrs, writeQuorum)
	} else {
		err = reduceReadQuorumErrs(ctx, errs, objectOpIgnoredErrs, readQuorum)
	}
	if err != nil {
		return fi, nil, err
	}

	// Pick one from the first valid metadata.
	fi, err = pickValidFileInfo(ctx, partsMetadata, modTime, etag, quorum)
	return fi, partsMetadata, err
}

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    public WithPublicConstructorAndConstant() {}
  }

  private static class WithPublicConstants {
    @Keep public static final WithPublicConstants FIRST = new WithPublicConstants();

    // To test that we pick the first constant alphabetically
    @Keep public static final WithPublicConstants SECOND = new WithPublicConstants();
  }

  private static class FirstConstantIsNull {
    // To test that null constant is ignored