首先安装依赖包，依赖包缺一不可，笔者曾安装python3未成功就是因为没有安装libffi-devel
sudo yum -y groupinstall "Development tools"
sudo 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 libffi-devel然后获取python3.7的安装包
wget https://www.python.org/ftp/python/3.7.0/Python-3.7.0.tgz解压
cd ~/Download
tar -xzvf Python-3.7.0.tar.xz配置python3的安装目录并安装
cd Python-3.7.0
./configure
sudo make
sudo make install查看软链接，没有创建
ln -s /usr/local/bin/python3/bin/python3 /usr/bin/python3
ln -s /usr/local/bin/python3/bin/pip3 /usr/bin/pip3最后在命令行中输入python3，能够进入python3终端即成功安装