</blockquote>

## Investigation

    ```Python hl_lines="14"
    {!> ../../../docs_src/body_nested_models/tutorial002.py!}
    ```

=== "🐍 3️⃣.9️⃣ & 🔛"

    ```Python hl_lines="14"
    {!> ../../../docs_src/body_nested_models/tutorial002_py39.py!}
    ```

=== "🐍 3️⃣.1️⃣0️⃣ & 🔛"

    ```Python hl_lines="12"
    {!> ../../../docs_src/body_nested_models/tutorial002_py310.py!}
    ```

## ⚒ 🆎

```Python hl_lines="12"
{!../../../docs_src/body_nested_models/tutorial001.py!}
```

これにより、各項目の型は宣言されていませんが、`tags`はある項目のリストになります。

## タイプパラメータを持つリストのフィールド

しかし、Pythonには型や「タイプパラメータ」を使ってリストを宣言する方法があります:

### typingの`List`をインポート

まず、Pythonの標準の`typing`モジュールから`List`をインポートします:

```Python hl_lines="1"
{!../../../docs_src/body_nested_models/tutorial002.py!}
```

### タイプパラメータを持つ`List`の宣言

=== "Python 3.10+"

    ```Python hl_lines="12"
    {!> ../../../docs_src/body_nested_models/tutorial002_py310.py!}
    ```

=== "Python 3.9+"

    ```Python hl_lines="14"
    {!> ../../../docs_src/body_nested_models/tutorial002_py39.py!}
    ```

=== "Python 3.8+"

    ```Python hl_lines="14"
    {!> ../../../docs_src/body_nested_models/tutorial002.py!}
    ```

## Set 类型

Import the `Response` class (sub-class) you want to use and declare it in the *path operation decorator*.

For large responses, returning a `Response` directly is much faster than returning a dictionary.

            AnnotationUseSiteTarget.PROPERTY_GETTER -> {
                if (symbol is KtPropertySymbol) {
                    return getDeprecation(symbol.getter ?: symbol)
                }
            }
            AnnotationUseSiteTarget.PROPERTY_SETTER -> {
                if (symbol is KtPropertySymbol) {
                    return getDeprecation(symbol.setter ?: symbol)
                }
            }

### Is concurrency better than parallelism?

Nope! That's not the moral of the story.

        }

    override val getter: KtPropertyGetterSymbol?
        get() = withValidityAssertion {
            if (descriptor.isDynamic()) return null
            val getter = descriptor.getter ?: return KtFe10DescDefaultPropertyGetterSymbol(descriptor, analysisContext)
            return KtFe10DescPropertyGetterSymbol(getter, analysisContext)
        }

    override val setter: KtPropertySetterSymbol?

FastAPI hat eine großartige Gemeinschaft, die Menschen mit unterschiedlichstem Hintergrund willkommen heißt.

## Erfinder - Betreuer

Hey! 👋

Das bin ich:

{% if people %}
<div class="user-list user-list-center">
{% for user in people.maintainers %}

Uma salva de palmas para eles. 👏 🙇

## Usuários mais ativos do ultimo mês

Estes são os usuários que estão [helping others the most with issues (questions) in GitHub](help-fastapi.md#responda-perguntas-no-github){.internal-link target=_blank} durante o ultimo mês. ☕

{% if people %}
<div class="user-list user-list-center">
{% for user in people.last_month_experts[:10] %}