1 安装必要的依赖
笔者新安装的CentOS7，没有任何依赖，需要进行安装。如果你安装了gcc和make，可以把以下的命令删除这两个。
yum -y install zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel
tk-devel gdbm-devel db4-devel libpcap-devel xz-devel gcc libffi-devel gcc make automake
autoconf libtool libffi-devel
2 下载Python3.7的包
有两种
