安装新的Python3与系统自带的Python2共存

安装依赖

yum -y install gcc make patch gdbm-devel openssl-devel sqlite-devel readline-devel zlib-devel bzip2-devel

下载Python3并编译安装

下载Python3

wget https://www.python.org/ftp/python/3.6.2/Python-3.6.2.tar.xz

可以使用迅雷下载再传到服务器上

新建程序目录

mkdir /usr/local/python3

解压并编译安装Python3

tar -xvJf  Python-3.6.2.tar.xz
cd Python-3.6.2
./configure --prefix=/usr/local/python3
make && make install

至此Python3和pip3已经安装好

设置环境变量

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

此时使用python3命令就是执行python3，使用python命令就是执行自带的python2，pip亦然