Pythonの`venv`モジュールを使用して、ディレクトリに仮想環境を作成します:

<div class="termy">

```console
$ python -m venv env
```

</div>

これにより、Pythonバイナリを含む`./env/`ディレクトリが作成され、その隔離された環境にパッケージのインストールが可能になります。

### 仮想環境の有効化

新しい環境を有効化するには:

=== "Linux, macOS"

    <div class="termy">

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

    </div>

=== "Windows PowerShell"

---

<div style="text-align: left; direction: ltr;">"We adopted the <strong>FastAPI</strong> library to spawn a <strong>REST</strong>server that can be queried to obtain <strong>predictions</strong>. [for Ludwig]"</div>

<div style="text-align: right; margin-right: 10%;">Kabir Khan - <strong>Microsoft</strong> <a href="https://github.com/tiangolo/fastapi/pull/26" target="_blank"><small>(Ref)</small></a></div>

---

„_Wir haben die **FastAPI**-Bibliothek genommen, um einen **REST**-Server zu erstellen, der abgefragt werden kann, um **Vorhersagen** zu erhalten. [für Ludwig]_“

<div style="text-align: right; margin-right: 10%;">Kabir Khan - <strong>Microsoft</strong> <a href="https://github.com/tiangolo/fastapi/pull/26" target="_blank"><small>(ref)</small></a></div>

---

"_We adopted the **FastAPI** library to spawn a **REST** server that can be queried to obtain **predictions**. [for Ludwig]_"

<div style="text-align: right; margin-right: 10%;">Kabir Khan - <strong>Microsoft</strong> <a href="https://github.com/tiangolo/fastapi/pull/26" target="_blank"><small>(ref)</small></a></div>

---

"_We adopted the **FastAPI** library to spawn a **REST** server that can be queried to obtain **predictions**. [for Ludwig]_"

First, install the `pydantic-settings` package:

<div class="termy">

```console
$ pip install pydantic-settings
---> 100%
```

</div>

It also comes included when you install the `all` extras with:

<div class="termy">

```console
$ pip install "fastapi[all]"
---> 100%
```

</div>

!!! info

Pour vérifier que cela a fonctionné, utilisez :

=== "Linux, macOS, Windows Bash"

    <div class="termy">

    ```console
    $ which pip

    some/directory/fastapi/env/bin/pip
    ```

    </div>

=== "Windows PowerShell"

    <div class="termy">

    ```console
    $ Get-Command pip

    some/directory/fastapi/env/bin/pip
    ```

    </div>

你可以使用 Python 的 `venv` 模块在一个目录中创建虚拟环境：

<div class="termy">

```console
$ python -m venv env
```

</div>

这将使用 Python 程序创建一个 `./env/` 目录，然后你将能够为这个隔离的环境安装软件包。

### 激活虚拟环境

使用以下方法激活新环境：

=== "Linux, macOS"

    <div class="termy">

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

    </div>

=== "Windows PowerShell"

    <div class="termy">

    ```console

                    <div class="col-sm-6">
                        <h1>
                            <la:message key="labels.crawler_title_edit"/>
                        </h1>
                    </div>
                </div>
            </div>
        </div>
        <section class="content">
            <la:form action="/admin/general/">
                <div class="row">

    <div class="termy">

    ```console
    $ source ./env/Scripts/activate
    ```

    </div>

Проверьте, что всё сработало:

=== "Linux, macOS, Windows Bash"

    <div class="termy">

    ```console
    $ which pip

    some/directory/fastapi/env/bin/pip
    ```

    </div>

=== "Windows PowerShell"

    <div class="termy">

    ```console