复制粘贴即可，下载速度慢，可直接打开网址下载，下载完成后传到服务器，再从解压开始！

yum -y groupinstall "Development tools"
 
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
#下载 Python3
wget https://www.python.org/ftp/python/3.9.9/Python-3.9.9.tar.xz
#创建文件夹
mkdir /usr/local/python3 
#解压编译安装
tar -xvJf  Python-3.9.9.tar.xz
cd Python-3.9.9
./configure --prefix=/usr/local/python3
make && make install
#给个软链
ln -s /usr/local/python3/bin/python3 /usr/bin/python3
ln -s /usr/local/python3/bin/pip3 /usr/bin/pip3