centos安装python3

1.安装环境 yum install gcc zlib-devel make openssl-devel

2.下载 解压 编译 安装 清除

wget https://www.python.org/ftp/python/3.6.8/Python-3.6.8.tar.xz
tar -Jxvf Python-3.6.8.tar.xz
cd Python-3.6.8
./configure --prefix=/opt/python3.6
make  
make install 
make clean
make distclean

3.查看安装的新版本信息

/opt/python3.6/bin/python3.6 -V

显示 Python 3.6.8 由此看出已成功编译安装的新版本python

4.软连接到当前用户的bin目录

ln -s /opt/python3.6/bin/python3.6 /usr/bin/python3
ln -s /opt/python3.6/bin/pip3 /usr/bin/pip3

5.升级安装好新版本python以后，默认依然是python2.6 将文件头部的#!/usr/bin/python修改为 #!/usr/bin/python3 即可。