python的虚拟环境

PS：以下操作全部基于python2，python3已经自动集成venv模块，直接运行py -m venv venv即可创建虚拟环境

• 安装 virtualenv

 pip install virtualenv

• 创建项目目录

mkdir myproject
cd myproject

• 创建一个不拷贝系统python包的独立运行环境

virtualenv --no-site-packages venv

Using base prefix 'c:\\program files\\python37'
New python executable in D:\dojo\python\virtualenv_test\venv\Scripts\python.exe
Installing setuptools, pip, wheel...done.

• 进入虚拟环境

source venv/Scripts/activate

• 退出虚拟环境

source venv/Scripts/deactivate.bat