centos7 安装python3.8

1.安装编译相关工具
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
yum install libffi-devel -y

2.下载安装包解压
wget https://www.python.org/ftp/python/3.8.2/Python-3.8.2.tar.xz
tar -xvJf Python-3.8.2.tar.xz

3.编译安装
mkdir /usr/local/python3
cd Python-3.8.2/
./configure --prefix=/usr/local/python3
make && make install

4.创建软连接
ln -s /usr/local/python3/bin/python3 /usr/local/bin/python3
ln -s /usr/local/python3/bin/pip3 /usr/local/bin/pip3

5.验证是否成功
[ Python-3.8.2]# python3 -V
Python 3.8.2
[ Python-3.8.2]# pip3 -V
pip 19.2.3 from /usr/local/python3/lib/python3.8/site-packages/pip (python 3.8)