///

## Recap { #recap }

With **FastAPI**, by using short, intuitive and standard Python type declarations, you get:

* Editor support: error checks, autocompletion, etc.
* Data "<dfn title="converting the string that comes from an HTTP request into Python data">parsing</dfn>"
* Data validation
* API annotation and automatic documentation

And you only have to declare them once.

The instructions here show you how to use the script at `./scripts/docs.py` with the `python` program directly.

But you can also use [Typer CLI](https://typer.tiangolo.com/typer-cli/), and you will get autocompletion in your terminal for the commands after installing completion.

If you install Typer CLI, you can install completion with:

<div class="termy">

```console
$ typer --install-completion

But then you have to call "that method that converts the first letter to upper case".

Was it `upper`? Was it `uppercase`? `first_uppercase`? `capitalize`?

Then, you try with the old programmer's friend, editor autocompletion.

You type the first parameter of the function, `first_name`, then a dot (`.`) and then hit `Ctrl+Space` to trigger the completion.

But, sadly, you get nothing useful:

<img src="/img/python-types/image01.png">

///

### 多種編輯器支援 { #editor-support }

整個框架的設計是為了讓使用變得簡單且直觀，在開始開發之前，所有決策都在多個編輯器上進行了測試，以確保提供最佳的開發體驗。

在最近的 Python 開發者調查中，我們能看到[被使用最多的功能是 autocompletion](https://www.jetbrains.com/research/python-developers-survey-2017/#tools-and-features)。

整個 **FastAPI** 框架就是基於這一點，任何地方都可以進行自動補齊。

你幾乎不需要經常來回看文件。

在這裡，你的編輯器可能會這樣幫助你：

* **Daha az hata**: İnsan (geliştirici) kaynaklı hataları yaklaşık %40 azaltır. *
* **Sezgisel**: Harika bir editör desteği. Her yerde <dfn title="oto-tamamlama, autocompletion, IntelliSense olarak da bilinir">Tamamlama</dfn>. Hata ayıklamaya daha az zaman.
* **Kolay**: Kullanımı ve öğrenmesi kolay olacak şekilde tasarlandı. Doküman okumaya daha az zaman.

* **Fewer bugs**: Reduce about 40% of human (developer) induced errors. *
* **Intuitive**: Great editor support. <dfn title="also known as auto-complete, autocompletion, IntelliSense">Completion</dfn> everywhere. Less time debugging.
* **Easy**: Designed to be easy to use and learn. Less time reading docs.

</div>

## Configure Your Editor { #configure-your-editor }

You would probably use an editor, make sure you configure it to use the same virtual environment you created (it will probably autodetect it) so that you can get autocompletion and inline errors.

For example:

* [VS Code](https://code.visualstudio.com/docs/python/environments#_select-and-activate-an-environment)

* **Fewer bugs**: Reduce about 40% of human (developer) induced errors. *
* **Intuitive**: Great editor support. <dfn title="also known as auto-complete, autocompletion, IntelliSense">Completion</dfn> everywhere. Less time debugging.
* **Easy**: Designed to be easy to use and learn. Less time reading docs.

* **高速なコーディング**: 開発速度を約 200%〜300% 向上させます。*
* **少ないバグ**: 開発者起因のヒューマンエラーを約 40% 削減します。*
* **直感的**: 素晴らしいエディタサポート。<dfn title="別名: auto-complete、autocompletion、IntelliSense">補完</dfn> があらゆる場所で使えます。デバッグ時間を削減します。
* **簡単**: 簡単に利用・習得できるようにデザインされています。ドキュメントを読む時間を削減します。
* **短い**: コードの重複を最小限にします。各パラメータ宣言から複数の機能を得られます。バグも減ります。
* **堅牢性**: 自動対話型ドキュメントにより、本番環境向けのコードが得られます。

[AnyIO](https://anyio.readthedocs.io/en/stable/) to be highly compatible and get its benefits (e.g. *structured concurrency*).

I created another library on top of AnyIO, as a thin layer on top, to improve a bit the type annotations and get better **autocompletion**, **inline errors**, etc. It also has a friendly introduction and tutorial to help you **understand** and write **your own async code**: [Asyncer](https://asyncer.tiangolo.com/). It would be particularly useful if you need to **combine async...