手动安装python3和xgboost

 yum install openssl-devel -y

 tar xvf Python-3.5..tar.xz
 cd Python-3.5.
 ./configure --prefix=/usr/local/python3.5.4
 make
 make install
 ln -s /usr/local/python3.5.4/bin/python3 /usr/bin/python3

 tar xvf setuptools-38.2..tar
 cd setuptools-38.2.
 python3 setup.py install

 tar zxvf pip-9.0..tar.gz
 cd pip-9.0.
 python3 setup.py install

 python3 -m pip install xgboost

要用xgboost来画图的话，还需要装些东西，重装编下python。

 yum -y install tk-devel

 # 重新编译python

 python3 -m pip install readline
 python3 -m pip install xgboost
 python3 -m pip install panda
 python3 -m pip install sklearn
 python3 -m pip install graphviz
 yum install graphviz -y

在命令行里画图，要在import之前使用agg作为后端

 import matplotlib
 matplotlib.use('Agg')
 import matplotlib.pyplot as plt