Python的虚拟环境的安装与配置(virtualenv)

• win+r 打开cmd
• pip install virtualenv
• 如下():

Microsoft Windows [版本 10.0.16299.492]
(c) 2017 Microsoft Corporation。保留所有权利。

C:\Users\Administrator>pip install virtualenv
Requirement already satisfied: virtualenv in c:\anaconda3\lib\site-packages (16.0.0)
notebook 5.4.0 requires ipykernel, which is not installed.
jupyter 1.0.0 requires ipykernel, which is not installed.
jupyter-console 5.2.0 requires ipykernel, which is not installed.
ipywidgets 7.1.1 requires ipykernel>=4.5.1, which is not installed.

C:\Users\Administrator>

• 安装虚拟环境管理包(https://blog.csdn.net/leafage_m/article/details/72854559):

• 详细方法(https://blog.csdn.net/shaququ/article/details/54292043)

• pip install virtualenvwrapper win

• 如下:

C:\Users\Administrator>pip install virtualenvwrapper win
Requirement already satisfied: virtualenvwrapper in c:\anaconda3\lib\site-packages (4.8.2)
Collecting win
  Could not find a version that satisfies the requirement win (from versions: )
No matching distribution found for win

C:\Users\Administrator>

• 修改虚拟环境默认的创建的目录如下图:

新建如下图:

然后确定保存,

然后如下:

C:\Users\Administrator>workon

Pass a name to activate one of the following virtualenvs:
==============================================================================
blogproject_env
mxonline
python2
python3

C:\Users\Administrator>

创建虚拟环境

• 创建一个py3scrapy虚拟环境

C:\Users\Administrator>mkvirtualenv py3scrapy
Using base prefix 'c:\\anaconda3'
New python executable in E:\Evns\py3scrapy\Scripts\python.exe
Installing setuptools, pip, wheel...done.

(py3scrapy) C:\Users\Administrator>

然后在E:\Evns目录能看到所创建的虚拟环境: