查看当前python版本 python -V
编译安装新版本
下载源代码https://www.python.org/ftp/python/
创建安装目录mkdir -p /usr/local/python3
检测./configure --prefix=/usr/local/python3
安装make && make install
链接文件到环境变量目录中
ln -s /usr/local/python3/bin/python3 /usr/local/bin/python3
ln -s /usr/local/python3/bin/pip3 /usr/local/bin/pip3