CentOS自带是python2.7，重新安装了python3，但是pip导入包，无法正常使用，报错如下
SSLError("Can't connect to HTTPS URL because the SSL module is not available.",)
在园里找到解决方案了，需要安装安装几个东西，再去安装python
yum install openssl
yum install zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel
装完再去编译python3的包，重新安装后，即可。