Например, модель выше описывает вот такой JSON "объект" (или словарь Python):

```JSON
{
    "name": "Foo",
    "description": "An optional description",
    "price": 45.2,
    "tax": 3.5
}
```

...поскольку `description` и `tax` являются необязательными (с `None` в качестве значения по умолчанию), вот такой JSON "объект" также подходит:

```JSON
{
    "name": "Foo",
    "price": 45.2
}

{* ../../docs_src/openapi_callbacks/tutorial001.py hl[35] *}

/// tip | Consejo

Observa que no estás pasando el router en sí (`invoices_callback_router`) a `callback=`, sino el atributo `.routes`, como en `invoices_callback_router.routes`.

///

            /* out of phase maybe? */
            /* inch forward 1 byte and try again */
            for (int i = 0; i < 35; i++) {
                sbuf[i] = sbuf[i + 1];
            }
            int b;
            if ((b = in.read()) == -1) {
                return null;
            }
            sbuf[35] = (byte) b;
        }

        key.mid = Encdec.dec_uint16le(sbuf, 34) & 0xFFFF;

예를 들면, 위의 이 모델은 JSON "`object`" (혹은 파이썬 `dict`)을 다음과 같이 선언합니다:

```JSON
{
    "name": "Foo",
    "description": "선택적인 설명란",
    "price": 45.2,
    "tax": 3.5
}
```

...`description`과 `tax`는 (기본 값이 `None`으로 되어 있어) 선택적이기 때문에, 이 JSON "`object`"는 다음과 같은 상황에서도 유효합니다:

```JSON
{
    "name": "Foo",
    "price": 45.2
}
```

## 매개변수로서 선언하기

                        TestCoverage(8, TestType.SOAK, Os.LINUX, JvmCategory.MAX_LTS_VERSION, 1),
                        TestCoverage(9, TestType.SOAK, Os.WINDOWS, JvmCategory.MIN_VERSION, 1),
                        TestCoverage(35, TestType.SOAK, Os.MACOS, JvmCategory.MAX_LTS_VERSION, 1, arch = Arch.AARCH64),
                        TestCoverage(
                            10,
                            TestType.ALL_VERSIONS_CROSS_VERSION,

            buffer[i] = (byte) (i % 256);
        }

        // Mock attributes (4 bytes)
        buffer[32] = 0x01;
        buffer[33] = 0x00;
        buffer[34] = 0x00;
        buffer[35] = 0x00;

        return buffer;
    }

    private byte[] createMockFileStandardInfoBuffer() {
        // Create a buffer that represents FileStandardInfo data
        byte[] buffer = new byte[24];

pkg syscall (linux-386), const ECONNABORTED = 103
pkg syscall (linux-386), const ECONNREFUSED = 111
pkg syscall (linux-386), const ECONNRESET = 104
pkg syscall (linux-386), const EDEADLK = 35
pkg syscall (linux-386), const EDEADLOCK = 35
pkg syscall (linux-386), const EDESTADDRREQ = 89
pkg syscall (linux-386), const EDOM = 33
pkg syscall (linux-386), const EDOTDOT = 73
pkg syscall (linux-386), const EDQUOT = 122

#### Data with values for fields with defaults { #data-with-values-for-fields-with-defaults }

But if your data has values for the model's fields with default values, like the item with ID `bar`:

```Python hl_lines="3  5"
{
    "name": "Bar",
    "description": "The bartenders",
    "price": 62,
    "tax": 20.2
}
```

they will be included in the response.

///

#### Dados com valores para campos com padrões

Mas se seus dados tiverem valores para os campos do modelo com valores padrões, como o item com ID `bar`:

```Python hl_lines="3 5"
{
"name": "Bar",
"description": "The bartenders",
"price": 62,
"tax": 20.2
}
```

eles serão incluídos na resposta.

#### Dados com os mesmos valores que os padrões

	_ = x[ErrMalformedXML-29]
	_ = x[ErrMissingContentLength-30]
	_ = x[ErrMissingContentMD5-31]
	_ = x[ErrMissingRequestBodyError-32]
	_ = x[ErrMissingSecurityHeader-33]
	_ = x[ErrNoSuchBucket-34]
	_ = x[ErrNoSuchBucketPolicy-35]
	_ = x[ErrNoSuchBucketLifecycle-36]
	_ = x[ErrNoSuchLifecycleConfiguration-37]
	_ = x[ErrInvalidLifecycleWithObjectLock-38]
	_ = x[ErrNoSuchBucketSSEConfig-39]
	_ = x[ErrNoSuchCORSConfiguration-40]