///

//// tab | Linux, macOS

<div class="termy">

```console
$ source .venv/bin/activate
```

</div>

////

//// tab | Windows PowerShell

<div class="termy">

```console
$ .venv\Scripts\Activate.ps1
```

</div>

////

//// tab | Windows Bash

///

//// tab | Linux, macOS

<div class="termy">

```console
$ source .venv/bin/activate
```

</div>

////

//// tab | Windows PowerShell

<div class="termy">

```console
$ .venv\Scripts\Activate.ps1
```

</div>

////

//// tab | Windows Bash

///

//// tab | Linux, macOS

<div class="termy">

```console
$ source .venv/bin/activate
```

</div>

////

//// tab | Windows PowerShell

<div class="termy">

```console
$ .venv\Scripts\Activate.ps1
```

</div>

////

//// tab | Windows Bash

///

//// tab | Linux, macOS

<div class="termy">

```console
$ source .venv/bin/activate
```

</div>

////

//// tab | Windows PowerShell

<div class="termy">

```console
$ .venv\Scripts\Activate.ps1
```

</div>

////

//// tab | Windows Bash

...`description` 필드는 **필수가 아닙니다**. `None`이라는 기본값이 있기 때문입니다.

### 문서에서의 입력 모델 { #input-model-in-docs }

문서에서 `description` 필드에 **빨간 별표**가 없고, 필수로 표시되지 않는 것을 확인할 수 있습니다:

<div class="screenshot">
<img src="/img/tutorial/separate-openapi-schemas/image01.png">
</div>

### 출력용 모델 { #model-for-output }

하지만 같은 모델을 다음처럼 출력으로 사용하면:

{* ../../docs_src/separate_openapi_schemas/tutorial001_py310.py hl[19] *}

////

Ainsi, si vous tapez :

<div class="termy">

```console
$ python
```

</div>

//// tab | Linux, macOS

Le système va **trouver** le programme `python` dans `/opt/custompython/bin` et l'exécuter.

Cela reviendrait à peu près à taper :

<div class="termy">

```console
$ /opt/custompython/bin/python
```

</div>

////

//// tab | Windows

**每次**開始一個**新的終端會話**來在這個專案工作時，你都需要執行這個操作。

///

//// tab | Linux, macOS

<div class="termy">

```console
$ source .venv/bin/activate
```

</div>

////

//// tab | Windows PowerShell

<div class="termy">

```console
$ .venv\Scripts\Activate.ps1
```

</div>

////

//// tab | Windows Bash

///

//// tab | Linux, macOS

<div class="termy">

```console
$ source .venv/bin/activate
```

</div>

////

//// tab | Windows PowerShell

<div class="termy">

```console
$ .venv\Scripts\Activate.ps1
```

</div>

////

//// tab | Windows Bash

///

//// tab | Linux, macOS

<div class="termy">

```console
$ source .venv/bin/activate
```

</div>

////

//// tab | Windows PowerShell

<div class="termy">

```console
$ .venv\Scripts\Activate.ps1
```

</div>

////

//// tab | Windows Bash

//// tab | Linux, macOS, Windows Bash

<div class="termy">

```console
// Sie können eine Umgebungsvariable MY_NAME erstellen mit
$ export MY_NAME="Wade Wilson"

// Dann können Sie sie mit anderen Programmen verwenden, etwa
$ echo "Hello $MY_NAME"

Hello Wade Wilson
```

</div>

////

//// tab | Windows PowerShell

<div class="termy">

```console