1.安装python虚拟环境
easy_install virtualenv
easy_install pip
cd /home/admin
virtualenv flask-website
source flask-website/bin/activate
#进入虚拟环境
deactivate
#退出虚拟环境
2.安装flask及依赖包
pip install flask
(flask-website)$python
>>>import flask
>>>
#正常没报错，就说明安装flask成功