=== "Python 3.10+"

    ```Python hl_lines="18-20"
    {!> ../../../docs_src/body_multiple_params/tutorial001_an_py310.py!}
    ```

=== "Python 3.9+"

    ```Python hl_lines="18-20"
    {!> ../../../docs_src/body_multiple_params/tutorial001_an_py39.py!}
    ```

=== "Python 3.8+"

    ```Python hl_lines="19-21"

    {!> ../../../docs_src/body_nested_models/tutorial004_py310.py!}
    ```

=== "Python 3.9+"

    ```Python hl_lines="20"
    {!> ../../../docs_src/body_nested_models/tutorial004_py39.py!}
    ```

=== "Python 3.8+"

    ```Python hl_lines="20"
    {!> ../../../docs_src/body_nested_models/tutorial004.py!}
    ```

This would mean that **FastAPI** would expect a body similar to:

    {!> ../../../docs_src/body_nested_models/tutorial004_py310.py!}
    ```

=== "Python 3.9+"

    ```Python hl_lines="20"
    {!> ../../../docs_src/body_nested_models/tutorial004_py39.py!}
    ```

=== "Python 3.8+"

    ```Python hl_lines="20"
    {!> ../../../docs_src/body_nested_models/tutorial004.py!}
    ```

这意味着 **FastAPI** 将期望类似于以下内容的请求体：

```JSON
{

    {!> ../../../docs_src/body_nested_models/tutorial004_py310.py!}
    ```

=== "Python 3.9+"

    ```Python hl_lines="20"
    {!> ../../../docs_src/body_nested_models/tutorial004_py39.py!}
    ```

=== "Python 3.8+"

    ```Python hl_lines="20"
    {!> ../../../docs_src/body_nested_models/tutorial004.py!}
    ```

Это означает, что **FastAPI** будет ожидать тело запроса, аналогичное этому:

```
http://127.0.0.1:8000/items/?skip=0&limit=10
```

Ancak, mesela şöyle bir adresi ziyaret ederseniz:

```
http://127.0.0.1:8000/items/?skip=20
```

Fonksiyonunuzdaki parametre değerleri aşağıdaki gibi olacaktır:

* `skip=20`: çünkü bağlantıda böyle tanımlandı.
* `limit=10`: çünkü varsayılan değer buydu.

## İsteğe Bağlı Parametreler

    ```

### ⚙️ 📊 🆎

& ⤴️ 👥 💪 ⚙️ ⚫️ 🆎 🔢:

=== "🐍 3️⃣.6️⃣ & 🔛"

    ```Python hl_lines="20"
    {!> ../../../docs_src/body_nested_models/tutorial004.py!}
    ```

=== "🐍 3️⃣.9️⃣ & 🔛"

    ```Python hl_lines="20"
    {!> ../../../docs_src/body_nested_models/tutorial004_py39.py!}
    ```

=== "🐍 3️⃣.1️⃣0️⃣ & 🔛"

    ```Python hl_lines="18"

```
http://127.0.0.1:8000/items/
```

🔜 🎏 🔜:

```
http://127.0.0.1:8000/items/?skip=0&limit=10
```

✋️ 🚥 👆 🚶, 🖼:

```
http://127.0.0.1:8000/items/?skip=20
```

🔢 💲 👆 🔢 🔜:

* `skip=20`: ↩️ 👆 ⚒ ⚫️ 📛
* `limit=10`: ↩️ 👈 🔢 💲

## 📦 🔢

🎏 🌌, 👆 💪 📣 📦 🔢 🔢, ⚒ 👫 🔢 `None`:

=== "🐍 3️⃣.6️⃣ & 🔛"

    ```Python hl_lines="9"

    ```Python hl_lines="18-23"
    {!> ../../../docs_src/schema_extra_example/tutorial003_py310.py!}
    ```

=== "Python 3.8+ non-Annotated"

    !!! tip
        尽可能选择使用 `Annotated` 的版本。

    ```Python hl_lines="20-25"
    {!> ../../../docs_src/schema_extra_example/tutorial003.py!}
    ```

## 文档 UI 中的例子

使用上面的任何方法，它在 `/docs` 中看起来都是这样的:

<img src="/img/tutorial/body-fields/image01.png">

## 技术细节

    {!> ../../../docs_src/path_operation_configuration/tutorial003_py310.py!}
    ```

=== "Python 3.9+"

    ```Python hl_lines="20-21"
    {!> ../../../docs_src/path_operation_configuration/tutorial003_py39.py!}
    ```

=== "Python 3.8+"

    ```Python hl_lines="20-21"
    {!> ../../../docs_src/path_operation_configuration/tutorial003.py!}
    ```

## Beschreibung mittels Docstring

    {!> ../../../docs_src/body_nested_models/tutorial004_py310.py!}
    ```

=== "Python 3.9+"

    ```Python hl_lines="20"
    {!> ../../../docs_src/body_nested_models/tutorial004_py39.py!}
    ```

=== "Python 3.8+"

    ```Python hl_lines="20"
    {!> ../../../docs_src/body_nested_models/tutorial004.py!}
    ```

Das würde bedeuten, dass **FastAPI** einen Body erwartet wie: