issue:Linux /opt/python36/bin/pip3.6 install mysqlclient报错：ERROR: Command errored out with exit
Centos 中安装 mysqlclient 原因： mysqlclient 依赖于 mysql devel 和 python devel 检查系统中是否已经安装mariadb相关包，先卸载 再重新安装mysql devel,python devel
I have one book, will post here later
