1. 安装依赖环境
# 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
2. 浏览器打开 https://www.python.org/ftp/python/ 查看最新的Python版本，标记为3.A.B
# wget https://www.python.org/ftp/python/3.6.4/Python-3.6.4.tgz
3. 创建Python3的目录
# mkdir /usr/local/python3
4. 解压下载文件并切换目录
# tar -zxvf Python-3.6.4.tgz
# cd Python-3.6.4
5. 执行
$ ./configure --prefix=/usr/local/python3 #出错原因：未安装gcc环境 yum install -y gcc
$ make && make install
6.添加环境变量
$ vim ~/.bashrc
export PYTHON_HOME=/usr/local/python3/bin export PATH=$PATH:$PYTHON_HOME
$ source ./.bashrc
# 6. 创建Python3的软链接
# $ ln -s /usr/local/python3/bin/python3 /usr/bin/python3
# 7. 创建Pip3的软链接
# $ ln -s /usr/local/python3/bin/pip3 /usr/bin/pip3
8. 测试命令 python3 和 pip3
# python3
# pip3
安装保留了原python命令调用python2
大功告成