CentOS6.7升级Python3.4.3

1、检查现有python版本

[root@xu  ~]# python -V

Python 2.6.6

[root@xu  ~]#

2、下载Python3.4.3

下载并上传到tmp目录

[root@xu  tmp]# ls

Python-3.4.3.tgz  yum.log

[root@xu  tmp]#

3、创建Python安装目录

[root@xu  tmp]# mkdir /opt/python3.4

4、解压tar文件

[[email protected] tmp]# tar -zxvf Python-3.4.3.tgz

[[email protected] tmp]# cd Python-3.4.3

[[email protected] Python-3.4.3]# pwd

/tmp/Python-3.4.3

5、配置及安装

[[email protected] Python-3.4.3]# ./configure --prefix=/opt/python3.4/

[[email protected] Python-3.4.3]# make

[[email protected] Python-3.4.3]# make install

6、建立软连接，使系统默认python指向新安装的python

[[email protected] tmp]# mv /usr/bin/python /usr/bin/python2.6.6

[[email protected] tmp]# ln -s /opt/python2.7/bin/python2.7 /usr/bin/python

[[email protected] tmp]# python -V

Python 3.4.3

不错，到此升级成功，然后编辑yum默认的python为旧版本python

[[email protected] tmp]# vim /usr/bin/yum

修改第一行，如下

修改前：#!/usr/bin/python

修改后：#!/usr/bin/python2.6.6

保存退出：（vim命令）:wq

注意：现在还没有安装easy_install和pip，且安装好后需要配置环境变量

下载setuptools-18.3.2.tar.gz

解压并安装

[[email protected] tmp]# tar -zxvf setuptools-18.3.2.tar.gz

[[email protected] setuptools-18.3.2]# python setup.py install

安装pip

[[email protected] tmp]# easy_install pip

-bash: easy_install: command not found

配置python环境变量

[[email protected] tmp]# vim /etc/profile

在最后面加上

PYTHON_HOME=/opt/python3.4

export PATH=$PYTHON_HOME/bin:$PATH

保存退出

[[email protected] tmp]# source /etc/profile

执行上面命令，是环境变量立即生效

安装pip

[[email protected] tmp]# easy_install pip

Searching for pip

Best match: pip 6.0.8

Adding pip 6.0.8 to easy-install.pth file

Installing pip script to /opt/python3.4/bin

Installing pip3.4 script to /opt/python3.4/bin

Installing pip3 script to /opt/python3.4/bin

Using /opt/python3.4/lib/python3.4/site-packages

Processing dependencies for pip

Finished processing dependencies for pip

到此ok，python升级完成，easy_install和pip命令可以正常使用