When you work in Python projects you probably should use a **virtual environment** (or a similar mechanism) to isolate the packages you install for each project.

/// info

If you already know about virtual environments, how to create them and use them, you might want to skip this section. 🤓

///

/// tip

A **virtual environment** is different than an **environment variable**.

Например:

* <a href="https://code.visualstudio.com/docs/python/environments#_select-and-activate-an-environment" class="external-link" target="_blank">VS Code</a>
* <a href="https://www.jetbrains.com/help/pycharm/creating-virtual-environment.html" class="external-link" target="_blank">PyCharm</a>

/// tip | Подсказка

Ví dụ:

* <a href="https://code.visualstudio.com/docs/python/environments#_select-and-activate-an-environment" class="external-link" target="_blank">VS Code</a>
* <a href="https://www.jetbrains.com/help/pycharm/creating-virtual-environment.html" class="external-link" target="_blank">PyCharm</a>

/// tip

Bạn thường chỉ cần làm điều này **một lần**, khi bạn tạo môi trường ảo.

設定例:

* <a href="https://code.visualstudio.com/docs/python/environments#_select-and-activate-an-environment" class="external-link" target="_blank">VS Code</a>
* <a href="https://www.jetbrains.com/help/pycharm/creating-virtual-environment.html" class="external-link" target="_blank">PyCharm</a>

/// tip | 豆知識

この設定は通常、仮想環境を作成した際に**一度だけ**行います。

///

## 設定編輯器

你可能會用到編輯器，請確保設定它使用你建立的相同虛擬環境（它可能會自動偵測到），以便你可以獲得自動完成和内嵌錯誤提示。

例如：

* <a href="https://code.visualstudio.com/docs/python/environments#_select-and-activate-an-environment" class="external-link" target="_blank">VS Code</a>
* <a href="https://www.jetbrains.com/help/pycharm/creating-virtual-environment.html" class="external-link" target="_blank">PyCharm</a>

/// tip

通常你只需要在建立虛擬環境時執行此操作**一次**。

///

## 退出虛擬環境

Por ejemplo:

* <a href="https://code.visualstudio.com/docs/python/environments#_select-and-activate-an-environment" class="external-link" target="_blank">VS Code</a>
* <a href="https://www.jetbrains.com/help/pycharm/creating-virtual-environment.html" class="external-link" target="_blank">PyCharm</a>

/// tip | Consejo

Por exemplo:

* <a href="https://code.visualstudio.com/docs/python/environments#_select-and-activate-an-environment" class="external-link" target="_blank">VS Code</a>
* <a href="https://www.jetbrains.com/help/pycharm/creating-virtual-environment.html" class="external-link" target="_blank">PyCharm</a>

/// tip | Dica

이렇게 하면 자동 완성 기능이나 코드 내 오류 표시 기능을 제대로 사용할 수 있습니다.

예시:

* <a href="https://code.visualstudio.com/docs/python/environments#_select-and-activate-an-environment" class="external-link" target="_blank">VS Code</a>
* <a href="https://www.jetbrains.com/help/pycharm/creating-virtual-environment.html" class="external-link" target="_blank">PyCharm</a>

/// tip | 팁

이 설정은 보통 가상 환경을 **처음 만들었을 때 한 번만** 해주면 됩니다.

///

<div class="termy">

```console
$ C:\opt\custompython\bin\python
```

</div>

////

Эта информация будет полезна при изучении [Виртуальных окружений](virtual-environments.md){.internal-link target=_blank}.

## Вывод

Благодаря этому вы должны иметь базовое представление о том, что такое **переменные окружения** и как использовать их в Python.

تقریباً معادل اینه که تایپ کنی:

<div class="termy">

```console
$ C:\opt\custompython\bin\python
```

</div>

////

این اطلاعات وقتی در مورد [محیط‌های مجازی](virtual-environments.md){.internal-link target=_blank} یاد می‌گیری به‌دردت می‌خوره.

## نتیجه‌گیری

با این باید یه درک پایه‌ای از **متغیرهای محیطی** و نحوه استفاده‌شون توی پایتون داشته باشی.