E você também pode declarar parâmetros de corpo como opcionais, definindo o valor padrão com `None`:

//// tab | Python 3.10+

```Python hl_lines="17-19"
{!> ../../docs_src/body_multiple_params/tutorial001_py310.py!}
```

////

//// tab | Python 3.8+

```Python hl_lines="19-21"
{!> ../../docs_src/body_multiple_params/tutorial001.py!}
```

////

/// note | "Nota"

```

////

//// tab | Python 3.10+ non-Annotated

/// tip | Dica

Prefira utilizar a versão `Annotated` se possível.

///

```Python hl_lines="1"
{!> ../../docs_src/cookie_params/tutorial001_py310.py!}
```

////

//// tab | Python 3.8+ non-Annotated

/// tip | Dica

Prefira utilizar a versão `Annotated` se possível.

///

```Python hl_lines="3"

///

```Python hl_lines="7-12  16"
{!> ../../docs_src/header_param_models/tutorial001_py310.py!}
```

////

//// tab | Python 3.9+ non-Annotated

/// tip

Prefer to use the `Annotated` version if possible.

///

```Python hl_lines="9-14  18"
{!> ../../docs_src/header_param_models/tutorial001_py39.py!}
```

////

//// tab | Python 3.8+ non-Annotated

/// tip

```Python hl_lines="4"
{!> ../../docs_src/body_fields/tutorial001.py!}
```

////

//// tab | 🐍 3️⃣.1️⃣0️⃣ & 🔛

```Python hl_lines="2"
{!> ../../docs_src/body_fields/tutorial001_py310.py!}
```

////

/// warning

👀 👈 `Field` 🗄 🔗 ⚪️➡️ `pydantic`, 🚫 ⚪️➡️ `fastapi` 🌐 🎂 (`Query`, `Path`, `Body`, ♒️).

///

## 📣 🏷 🔢

👆 💪 ⤴️ ⚙️ `Field` ⏮️ 🏷 🔢:

```

////

//// tab | 🐍 3️⃣.9️⃣ & 🔛

```Python hl_lines="3  17"
{!> ../../docs_src/path_operation_configuration/tutorial001_py39.py!}
```

////

//// tab | 🐍 3️⃣.1️⃣0️⃣ & 🔛

```Python hl_lines="1  15"
{!> ../../docs_src/path_operation_configuration/tutorial001_py310.py!}
```

////

👈 👔 📟 🔜 ⚙️ 📨 & 🔜 🚮 🗄 🔗.

/// note | "📡 ℹ"

👆 💪 ⚙️ `from starlette import status`.

```Python hl_lines="1  3  12-16"
{!> ../../docs_src/extra_data_types/tutorial001.py!}
```

////

//// tab | 🐍 3️⃣.1️⃣0️⃣ & 🔛

```Python hl_lines="1  2  11-15"
{!> ../../docs_src/extra_data_types/tutorial001_py310.py!}
```

////

🗒 👈 🔢 🔘 🔢 ✔️ 👫 🐠 💽 🆎, & 👆 💪, 🖼, 🎭 😐 📅 🎭, 💖:

//// tab | 🐍 3️⃣.6️⃣ & 🔛

```Python hl_lines="18-19"
{!> ../../docs_src/extra_data_types/tutorial001.py!}

import pytest
from fastapi.testclient import TestClient

from ...utils import needs_py310, needs_pydanticv2


@pytest.fixture(name="client")
def get_client() -> TestClient:
    from docs_src.separate_openapi_schemas.tutorial001_py310 import app

    client = TestClient(app)
    return client


@needs_py310
def test_create_item(client: TestClient) -> None:
    response = client.post("/items/", json={"name": "Foo"})

```

////

//// tab | Python 3.10+ non-Annotated

/// tip

Бажано використовувати `Annotated` версію, якщо це можливо.

///

```Python hl_lines="1"
{!> ../../docs_src/cookie_params/tutorial001_py310.py!}
```

////

//// tab | Python 3.8+ non-Annotated

/// tip

Бажано використовувати `Annotated` версію, якщо це можливо.

///

```Python hl_lines="3"

```

////

//// tab | Python 3.10+ non-Annotated

/// tip

Prefer to use the `Annotated` version if possible.

///

```Python hl_lines="1"
{!> ../../docs_src/cookie_params/tutorial001_py310.py!}
```

////

//// tab | Python 3.8+ non-Annotated

/// tip

Prefer to use the `Annotated` version if possible.

///

```Python hl_lines="3"

```Python hl_lines="9-13"
{!> ../../docs_src/dependencies/tutorial002_py310.py!}
```

////

클래스의 인스턴스를 생성하는 데 사용되는 `__init__` 메서드에 주목하기 바랍니다:

//// tab | 파이썬 3.6 이상

```Python hl_lines="12"
{!> ../../docs_src/dependencies/tutorial002.py!}
```

////

//// tab | 파이썬 3.10 이상

```Python hl_lines="10"
{!> ../../docs_src/dependencies/tutorial002_py310.py!}
```

////