linux下python安装其他版本替换之前旧版本

安装相关包：

yum install zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gcc make

下载安装文件：

从网站查询安装版本 http://mirrors.sohu.com/python
比如：http://mirrors.sohu.com/python/3.6.0/Python-3.6.0a1.tar.xz

# xz -d Python-3.6.0a1.tar.xz

# tar xf Python-3.6.0a1.tar -C /usr/local/src/

# cd /usr/local/src/Python-3.6.0/

# ./configure --prefix=/usr/local/python36

# make -j8 && make install

可选步骤，环境变量：vim ~/.bash_profile
PATH=$PATH:/usr/local/python36/bin

如果之前有安装了python2情况下，安装方式，

从网站下载Python ：https://www.python.org/downloads/release/python-360/

安装过程：

tar -zxvf Python-3.6.0.tgz

cd Python-3.6.0

./configure --prefix=/usr/python

make

make install

配置：

查看之前的版本，看到是个软连接

ll /usr/bin/python

重命名创建修改软连接

[root@centos7 Python-3.6.0]# ll /usr/bin/python

lrwxrwxrwx. 1 root root 7 12月 16 08:48 /usr/bin/python -> python2

[root@centos7 Python-3.6.0]# mv /usr/bin/python /usr/bin/python.bak

[root@centos7 Python-3.6.0]# ln -s /usr/python/bin/python3 /usr/bin/python

[root@centos7 Python-3.6.0]# python

Python 3.6.0 (default, Dec 28 2016, 08:56:17)

[GCC 4.8.5 20150623 (Red Hat 4.8.5-11)] on
Linux

Type "help", "copyright", "credits" or "license" for more information.

>>> print('hell0')

hell0