(1) 在服务器上创建nvwa隔离环境：
ssh -A gaoyazhe@bastion.prod.gengmei
rank-compute01
virtualenv -p /usr/bin/python3 nvwa
source nvwa/bin/activate
(2) 在nvwa中安装xlearn：
#参考链接：http://xlearn-doc.readthedocs.io/en/latest/install.html
cd nvwa
git clone https://github.com/aksnzhy/xlearn.git
cd xlearn
./build.sh
(3) 在nvwa中安装相关工具包：
pip install pymysql
pip install numpy
sudo apt-get install python3-dev
pip install pandas
问题：
#安装pandas出错：Python.h: No such file or directory
#解决方案：sudo apt-get install python3-dev
pip install scipy
pip install scikit-learn
pip uninstall numpy
pip install numpy==1.14.5
问题：
#import sklearn出错：RuntimeWarning: numpy.dtype size changed, may indicate binary incompatibility
#解决方案：pip uninstall numpy；pip install numpy==1.14.5
(4) requirements:
pymysql=='0.9.2'
numpy=='1.14.5'
pandas=='0.22.0'
scipy=='1.1.0'
sklearn=='0.19.2'