升级pip3
/usr/local/python3/bin/python3.9 -m pip install --upgrade pip安装virtualenv
pip3 install virtualenv如果存在virtualenv的软连接先重命名
mv /usr/bin/virtualenv /usr/bin/virtualenv.bak再添加软连接
ln -s /usr/local/python3/bin/virtualenv /usr/bin/virtualenv进入项目文件夹建立虚拟环境
virtualenv venv激活虚拟环境
source venv/bin/activate安装依赖，国内得用临时清华源
pip install -r requirements.txt -i https://pypi.tuna.tsinghua.edu.cn/simple
退出虚拟环境
deactivate
