如何激活虚拟环境？ [复制]

Question

我想安装 virtualenv。我输入

pip install virtualenv

反应是

Requirement already satisfied: virtualenv in c:\users\novin\appdata\roaming\python\python38\site-packages (20.6.0)
Requirement already satisfied: platformdirs<3,>=2 in c:\users\novin\appdata\roaming\python\python38\site-packages (from virtualenv) (2.2.0)
Requirement already satisfied: distlib<1,>=0.3.1 in c:\users\novin\appdata\roaming\python\python38\site-packages (from virtualenv) (0.3.2)
Requirement already satisfied: filelock<4,>=3.0.0 in c:\programdata\anaconda3\lib\site-packages (from virtualenv) (3.0.12)
Requirement already satisfied: backports.entry-points-selectable>=1.0.4 in c:\users\novin\appdata\roaming\python\python38\site-packages (from virtualenv) (1.1.0)
Requirement already satisfied: six<2,>=1.9.0 in c:\programdata\anaconda3\lib\site-packages (from virtualenv) (1.15.0)

当我想激活它时，输入“source bin/activate”，响应是“source:

The term 'source' is not recognized as the name of a cmdlet, function, script file, or operable program. Check the spelling of the name, or if a path was
included, verify that the path is correct and try again.
At line:1 char:1
+ source bin/activate
+ ~~~~~~
    + CategoryInfo          : ObjectNotFound: (source:String) [], CommandNotFoundException
    + FullyQualifiedErrorId : CommandNotFoundException"

Answer 1

首先，制作一个venv：

C:\Users\username> mkvirtualenv web

一个快速的解决方法是像这样激活 cmd：

PS C:\Users\username> cmd
Microsoft Windows [Version 10.0.19043.1151]
(c) Microsoft Corporation. All rights reserved.

C:\Users\username>workon web
(web) C:\Users\username>

如果您坚持使用 PowerShell，请运行：

PS C:\Users\username> .\\Envs\web\Scripts\activate.ps1

这里，Envs 是存放你的 venvs 的目录，对我来说这个目录是：C:\Users\username\Envs

但是，要使用它，您必须以管理员身份运行 PowerShell，然后运行：

PS C:\Users\username> Set-ExecutionPolicy Unrestricted

在此之后，您将能够运行您的虚拟环境。