def main(user_id: str):
    return user_id


# Un modelo de Pydantic
class User(BaseModel):
    id: int
    name: str
    joined: date
```

Que luego puede ser usado como:

```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)
```

我們用 `list(data.items())` 把這個可疊代物件轉成正式的 `list`。

接著用 `random.choice()` 從清單中取得一個「隨機值」，也就是一個 `(id, name)` 的 tuple。可能像是 `("imdb-tt0371724", "The Hitchhiker's Guide to the Galaxy")`。

然後把這個 tuple 的兩個值分別指定給變數 `id` 和 `name`。

因此，即使使用者沒有提供 item ID，仍然會收到一個隨機建議。

……而這全部只用一行簡單的程式碼完成。🤯 你不愛 Python 嗎？🐍

{* ../../docs_src/query_params_str_validations/tutorial015_an_py310.py ln[22:30] hl[29] *}

이 경우, 다음 `str`입니다:

```Python
"{$callback_url}/invoices/{$request.body.id}"
```

따라서 여러분의 API 사용자(외부 개발자)가 *여러분의 API*로 다음 요청을 보내고:

```
https://yourapi.com/invoices/?callback_url=https://www.external.org/events
```

JSON body가 다음과 같다면:

```JSON
{
    "id": "2expen51ve",
    "customer": "Mr. Richie Rich",
    "total": "9999"
}
```

            },
            "Item": {
                "title": "Item",
                "required": [
                    "id",
                    "value"
                ],
                "type": "object",
                "properties": {
                    "id": {
                        "title": "Id",
                        "type": "string"
                    },
                    "value": {

            },
            "Item": {
                "title": "Item",
                "required": [
                    "id",
                    "value"
                ],
                "type": "object",
                "properties": {
                    "id": {
                        "title": "Id",
                        "type": "string"
                    },
                    "value": {

            },
            "Item": {
                "title": "Item",
                "required": [
                    "id",
                    "value"
                ],
                "type": "object",
                "properties": {
                    "id": {
                        "title": "Id",
                        "type": "string"
                    },
                    "value": {

ichikawamisato.yamanashi.jp
ichinohe.iwate.jp
ichinomiya.aichi.jp
ichinomiya.chiba.jp
ichinoseki.iwate.jp
icu
icurus.jp
id
id.au
id.cv
id.firewalledreplit.co
id.forgerock.io
id.ir
id.lv
id.ly
id.repl.co
id.replit.app
id.replit.dev
id.us
id.vn
ide.kyoto.jp
idf.il
idrett.no
idv.hk
idv.tw
ie
ie.eu.org
ie.ua
ieee
if.ua
ifm

* Fix issue when attempting to unmount a wrong vSphere volume ([#37413](https://github.com/kubernetes/kubernetes/pull/37413), [@BaluDontu](https://github.com/BaluDontu))
* Fix issue in converting AWS volume ID from mount paths ([#36840](https://github.com/kubernetes/kubernetes/pull/36840), [@jingxu97](https://github.com/jingxu97))

     * @return the converted ListBody object
     */
    protected ListBody createListBody(final DictionaryFile<? extends DictionaryItem> dictionaryFile) {
        final ListBody body = new ListBody();
        body.id = dictionaryFile.getId();
        body.type = dictionaryFile.getType();
        body.path = dictionaryFile.getPath();
        body.timestamp = dictionaryFile.getTimestamp();
        return body;
    }

 * <ul>
 *   <li>ftpConfigSystemKey: The system key used to configure the FTPClientConfig.</li>
 *   <li>ftpConfigServerLanguageCode: The language code used by the FTP server.</li>
 *   <li>ftpConfigServerTimeZoneId: The time zone ID of the FTP server.</li>
 *   <li>activeExternalHost: The external IP address to use for active mode FTP.</li>
 *   <li>activeMinPort: The minimum port number for active mode FTP.</li>