# Virtual Environments { #virtual-environments }

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**.

$ deactivate

// Activate the virtual environment in prisoner-of-azkaban/.venv 🚀
$ source .venv/bin/activate

// Now when you run python, it will find the package sirius installed in this virtual environment ✨
$ python main.py

I solemnly swear 🐺
```

</div>

## 代替手段

# 가상 환경

Python 프로젝트를 작업할 때는 **가상 환경** (또는 이와 유사한 도구)을 사용하는 것이 좋습니다. 각 프로젝트 마다 설치하는 패키지를 분리하여 관리할 수 있습니다.

/// info | 정보

이미 가상 환경에 대해 잘 알고 있다면, 이 섹션은 건너 뛰어도 괜찮습니다. 🤓

///

/// tip | 팁

**가상 환경(Virtual Environment)** 은 **환경 변수(Environment Variable)** 와 다릅니다.

**환경 변수**는 시스템에 존재하며, 프로그램이 사용할 수 있는 변수입니다.

**가상 환경**은 몇몇 파일로 구성된 하나의 디렉터리입니다.

///

/// info | 정보

이 페이지에서는 **가상 환경**의 사용 방법과 작동 방식을 설명합니다.

        }, page);
    }

    /**
     * Gets the base path for virtual host based on the virtual host key and page.
     *
     * @param s The virtual host key
     * @param page The HTML page
     * @return The base path for the virtual host
     */
    protected String getVirtualHostBasePath(final String s, final HtmlNext page) {

        return relatedQueryMap.size();
    }

    /**
     * Extracts the virtual host key from a RelatedQuery entity.
     * If the virtual host is blank or null, returns an empty string.
     *
     * @param entity the RelatedQuery entity to extract the host key from
     * @return the virtual host key, or empty string if blank or null
     */
    protected String getHostKey(final RelatedQuery entity) {

    }

    /**
     * Extracts the virtual host key from a RelatedContent entity.
     * If the virtual host is blank or null, returns an empty string.
     * This key is used to organize related content by virtual host.
     *
     * @param entity the RelatedContent entity to extract the host key from
     * @return the virtual host key, or empty string if not specified
     */

/// info

To receive uploaded files and/or form data, first install <a href="https://github.com/Kludex/python-multipart" class="external-link" target="_blank">`python-multipart`</a>.

Make sure you create a [virtual environment](../virtual-environments.md){.internal-link target=_blank}, activate it, and then install it, for example:

```console
$ pip install python-multipart
```

///

## Import `File` and `Form` { #import-file-and-form }

<div class="termy">

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

</div>

////

This information will be useful when learning about [Virtual Environments](virtual-environments.md){.internal-link target=_blank}.

## Conclusion { #conclusion }

With this you should have a basic understanding of what **environment variables** are and how to use them in Python.

Just keep in mind that when you read "server" in general, it could refer to one of those two things.

        mockBhv.setTestData(testData);

        int count = relatedQueryHelper.load();
        assertEquals(1, count); // One virtual host key (empty)

        String[] results = relatedQueryHelper.getRelatedQueries("java");
        assertEquals(3, results.length);
        assertEquals("programming", results[0]);