python 虚拟环境的安装:
pip install virtualenv
mkdir flaskproject
cd flaskproject
virtualenv flaskprojectenv
然后进行激活:
source flaskprojectenv/bin/activate
退出虚拟环境的命令是:deactivate
cd /var/www/stock_graph
virtualenv venv
# 开启虚拟环境
source venv/bin/activate