Centos8 升级python3.6版本到python3.9

下载Python3.9.5

1:wget https://www.python.org/ftp/python/3.9.5/Python-3.9.5.tgz 
2:tar zxvf Python-3.9.5.tgz

安装必须的包

3:dnf -y install gcc zlib* libffi-devel 
4:cd Python-3.9.5/ 
5:./configure --prefix=/usr/local/python3 --enable-optimizations 
6:make  
7:make install

删除原先的Python3和pip3

8:rm -rf /usr/bin/python3 
9:ln -s /usr/local/python3/bin/python3 /usr/bin/python3 
10:rm -rf /usr/bin/pip3 
11:ln -s /usr/local/python3/bin/pip3 /usr/bin/pip3