{!> ../../docs_src/security/tutorial002.py!}
```

////

Notice that we declare the type of `current_user` as the Pydantic model `User`.

This will help us inside of the function with all the completion and type checks.

/// tip

You might remember that request bodies are also declared with Pydantic models.

Here **FastAPI** won't get confused because you are using `Depends`.

///

/// check

```Python hl_lines="7"
{!../../docs_src/path_params/tutorial002.py!}
```

In this case, `item_id` is declared to be an `int`.

/// check

This will give you editor support inside of your function, with error checks, completion, etc.

///

## Data <abbr title="also known as: serialization, parsing, marshalling">conversion</abbr>

...на:

```Python
        ... "item_price": item.price ...
```

...і побачите, як ваш редактор автоматично заповнюватиме атрибути та знатиме їхні типи:

![editor support](https://fastapi.tiangolo.com/img/vscode-completion.png)

Для більш повного ознайомлення з додатковими функціями, перегляньте <a href="https://fastapi.tiangolo.com/tutorial/">Туторіал - Посібник Користувача</a>.

**Spoiler alert**: туторіал - посібник користувача містить:

- **স্বল্প bugs**: মানুব (ডেভেলপার) সৃষ্ট ত্রুটির প্রায় ৪০% হ্রাস করে। \*
- **স্বজ্ঞাত**: দুর্দান্ত এডিটর সাহায্য <abbr title="also known as auto-complete, autocompletion, IntelliSense">Completion</abbr> নামেও পরিচিত। দ্রুত ডিবাগ করা যায়।

- **সহজ**: এটি এমন ভাবে সজানো হয়েছে যেন নির্দেশিকা নথি পড়ে সহজে শেখা এবং ব্যবহার করা যায়।

* **Menos errores**: Reduce los errores humanos (de programador) aproximadamente un 40%. *
* **Intuitivo**: Gran soporte en los editores con <abbr title="conocido en inglés como auto-complete, autocompletion, IntelliSense, completion">auto completado</abbr> en todas partes. Gasta menos tiempo <abbr title="buscando y corrigiendo errores">debugging</abbr>.
* **Fácil**: Está diseñado para ser fácil de usar y aprender. Gastando menos tiempo leyendo documentación.

  // threadpool of GPU event mgr, as that can trigger more callbacks to be
  // scheduled on that same threadpool, causing a deadlock in cases where the
  // caller of event_mgr->ThenExecute() blocks on the completion of the callback
  // (as in the case of ConstOp kernel creation on GPU, which involves copying a
  // CPU tensor to GPU).
  // Setting a larger thread pool does not help with the Swift caller, as we use

	networkingv1alpha3 "istio.io/api/networking/v1alpha3"
	clientnetworking "istio.io/client-go/pkg/apis/networking/v1"
	"istio.io/istio/istioctl/pkg/cli"
	"istio.io/istio/istioctl/pkg/clioptions"
	"istio.io/istio/istioctl/pkg/completion"
	istioctlutil "istio.io/istio/istioctl/pkg/util"
	"istio.io/istio/operator/pkg/values"
	"istio.io/istio/pilot/pkg/model"
	"istio.io/istio/pilot/pkg/serviceregistry/kube/controller"
	"istio.io/istio/pkg/config/constants"

```

......改为：

```Python
        ... "item_price": item.price ...
```

......注意观察编辑器是如何自动补全属性并且还知道它们的类型：

![editor support](https://fastapi.tiangolo.com/img/vscode-completion.png)

<a href="https://fastapi.tiangolo.com/zh/tutorial/">教程 - 用户指南</a> 中有包含更多特性的更完整示例。

**剧透警告**： 教程 - 用户指南中的内容有：

* 对来自不同地方的参数进行声明，如：**请求头**、**cookies**、**form 表单**以及**上传的文件**。

  // have two requirements that significantly complicate their design.
  // 1. Cancellation should propagate from the returned future to the input future(s).
  // 2. The returned futures shouldn't unnecessarily 'pin' their inputs after completion.
  //
  // A consequence of these requirements is that the delegate futures cannot be stored in
  // final fields.
  //
  // For simplicity the rest of this description will discuss Futures.catching since it is the

   * time it is closed. In such calls [byteCount] is the number of bytes returned to the
   * application. This may be smaller than the resource's byte count if were read to completion.
   *
   * This method is always invoked after [responseBodyStart].
   */
  open fun responseBodyEnd(
    call: Call,
    byteCount: Long,
  ) {
  }

  /**