これは以下のように用いられます:

```Python
my_user: User = User(id=3, name="John Doe", joined="2018-07-19")

second_user_data = {
    "id": 4,
    "name": "Mary",
    "joined": "2018-11-30",
}

my_second_user: User = User(**second_user_data)
```

!!! info "情報"
    `**second_user_data` は以下を意味します：

    `second_user_data`辞書のキーと値を直接、キーと値の引数として渡します。これは、`User(id=4, name="Mary", joined="2018-11-30")`と同等です。

### エディタのサポート

--------------------------------------------------\n * Data Api implementation\n * ------------------------------------------------------------------------\n */\n\n$(document)\n  .on(Event.KEYDOWN_DATA_API, Selector.DATA_TOGGLE, Dropdown._dataApiKeydownHandler)\n  .on(Event.KEYDOWN_DATA_API, Selector.MENU, Dropdown._dataApiKeydownHandler)\n  .on(`${Event.CLICK_DATA_API} ${Event.KEYUP_DATA_API}`, Dropdown._clearMenus)\n  .on(Event.CLICK_DATA_API, Selector.DATA_TOGGLE, function (event) {\n    even...

pkg debug/pe, const IMAGE_SCN_CNT_CODE ideal-int #51868
pkg debug/pe, const IMAGE_SCN_CNT_INITIALIZED_DATA = 64 #51868
pkg debug/pe, const IMAGE_SCN_CNT_INITIALIZED_DATA ideal-int #51868
pkg debug/pe, const IMAGE_SCN_CNT_UNINITIALIZED_DATA = 128 #51868
pkg debug/pe, const IMAGE_SCN_CNT_UNINITIALIZED_DATA ideal-int #51868
pkg debug/pe, const IMAGE_SCN_LNK_COMDAT = 4096 #51868
pkg debug/pe, const IMAGE_SCN_LNK_COMDAT ideal-int #51868

pkg syscall (linux-386), type Cmsghdr struct, X__cmsg_data [0]uint8
pkg syscall (linux-386-cgo), type Cmsghdr struct, X__cmsg_data [0]uint8
pkg syscall (linux-amd64), type Cmsghdr struct, X__cmsg_data [0]uint8
pkg syscall (linux-amd64-cgo), type Cmsghdr struct, X__cmsg_data [0]uint8
pkg syscall (linux-arm), type Cmsghdr struct, X__cmsg_data [0]uint8
pkg syscall (linux-arm-cgo), type Cmsghdr struct, X__cmsg_data [0]uint8

Néanmoins, nous pouvons déclarer le schéma attendu pour le corps de la requête.

### Type de contenu OpenAPI personnalisé

Теперь можно создать копию существующей модели, используя `.copy()`, и передать параметр `update` с `dict`, содержащим данные для обновления.

Например, `stored_item_model.copy(update=update_data)`:

=== "Python 3.10+"

    ```Python hl_lines="33"
    {!> ../../../docs_src/body_updates/tutorial002_py310.py!}
    ```

=== "Python 3.9+"

    ```Python hl_lines="35"

      this.headerBlock = headerBlock
    }

    override fun data(
      inFinished: Boolean,
      streamId: Int,
      source: BufferedSource,
      length: Int,
    ) {
      check(type == -1)
      this.type = Http2.TYPE_DATA
      this.inFinished = inFinished
      this.streamId = streamId
      this.data = source.readByteString(length.toLong()).toByteArray()
    }

```Python hl_lines="34"
{!../../../docs_src/body_updates/tutorial002.py!}
```

### 使用 Pydantic 的 `update` 参数

接下来，用 `.copy()` 为已有模型创建调用 `update` 参数的副本，该参数为包含更新数据的 `dict`。

例如，`stored_item_model.copy(update=update_data)`：

```Python hl_lines="35"
{!../../../docs_src/body_updates/tutorial002.py!}
```

### 更新部分数据小结

简而言之，更新部分数据应：

* 使用 `PATCH` 而不是 `PUT` （可选，也可以用 `PUT`）；
* 提取存储的数据；
* 把数据放入 Pydantic 模型；

!!! info
    In Pydantic v1 the method was called `.copy()`, it was deprecated (but still supported) in Pydantic v2, and renamed to `.model_copy()`.

    The examples here use `.copy()` for compatibility with Pydantic v1, but you should use `.model_copy()` instead if you can use Pydantic v2.

Like `stored_item_model.model_copy(update=update_data)`:

=== "Python 3.10+"

pkg syscall (windows-386), const IO_REPARSE_TAG_SYMLINK = 2684354572
pkg syscall (windows-386), const IO_REPARSE_TAG_SYMLINK ideal-int
pkg syscall (windows-386), const MAXIMUM_REPARSE_DATA_BUFFER_SIZE = 16384
pkg syscall (windows-386), const MAXIMUM_REPARSE_DATA_BUFFER_SIZE ideal-int
pkg syscall (windows-386), const SYMBOLIC_LINK_FLAG_DIRECTORY = 1
pkg syscall (windows-386), const SYMBOLIC_LINK_FLAG_DIRECTORY ideal-int