官网版本地址：https://www.python.org/ftp/python/

① 安装依赖环境

 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

② 下载python版本包

wget https://www.python.org/ftp/python/3.9.0/Python-3.9.0.tgz

③ 安装python

mkdir -p /usr/local/python3.9.0
tar -zxvf Python-3.9.0.tgz
cd Python-3.6.1
./configure --prefix=/usr/local/python3.9.0
make && make install

④ 建立软链接

ln -s /usr/local/python3.9.0/bin/python3 /usr/bin/python3
ln -s /usr/local/python3.9.0/bin/pip3 /usr/bin/pip3

⑤ 加入path

vim ~/.bash_profile# .bash_profile
if [ -f ~/.bashrc ]; then. ~/.bashrc
fi
PATH=$PATH:$HOME/bin:/usr/local/python3.9.0/bin
export PATH

source ~/.bash_profile

⑥ 验证