centos7安装mxnet

pip install mxnet-cu90 -i http://pypi.douban.com/simple --trusted-host pypi.douban.com

安装sklearn时总报错

ERROR: scikit-learn requires Python '>=3.5' but the running Python is 2.7.13

经查知最新支持py2.7的是0.20版本，安装：

pip install -U scikit-learn==0.20 -i http://pypi.douban.com/simple/ --trusted-host pypi.douban.com