第一步：下载python2.7.9版本源码：

wget http://python.org/ftp/python/2.7.9/Python-2.7.9.tgz

解压文件

#tar zxvf Python-2.7.9.tar.bz2

root@iZ25xo8uaamZ:/opt/software# cd Python-2.7.9/
root@iZ25xo8uaamZ:/opt/software/Python-2.7.9# dir
config.guess  Doc         LICENSE          Objects        Python
config.sub    Grammar     Mac              Parser         README
configure     Include     Makefile.pre.in  PC             RISCOS
configure.ac  install-sh  Misc             PCbuild        setup.py
Demo          Lib         Modules          pyconfig.h.in  Tools

root@iZ25xo8uaamZ:/opt/software/Python-2.7.9# mkdir /usr/local/python2.7.9

编译之前，需要先安装zlib包：

从官网http://www.zlib.net/下载zlib-1.2.8.tar.gz

root@iZ25xo8uaamZ:/opt/software# tar -xvf zlib-1.2.8.tar.gz
root@iZ25xo8uaamZ:/opt/software# cd zlib-1.2.8

root@iZ25xo8uaamZ:/opt/software# ./configure && make && make install

进入Python-2.7.9目录，开始安装Python

root@iZ25xo8uaamZ:/opt/software/Python-2.7.9# ./configure --prefix=/usr/local/python2.7.9

root@iZ25xo8uaamZ:/opt/software/Python-2.7.9# make && make install

安装成功！

root@iZ25xo8uaamZ:/opt/software/Python-2.7.9# python -V
Python 2.6.6

版本依然是2.6.6，现在开始升级python，

查看python命令所在目录

root@iZ25xo8uaamZ:/opt/software/Python-2.7.9# whereis python
python: /usr/bin/python2.6 /usr/bin/python /etc/python2.6 /etc/python /usr/lib/python2.6 /usr/lib/python2.4 /usr/lib/python2.5 /usr/local/lib/python2.6 /usr/include/python2.6 /usr/share/python /usr/share/man/man1/python.1.gz

将/usr/bin/python备份

root@iZ25xo8uaamZ:/opt/software/Python-2.7.9# mv /usr/bin/python /usr/bin/python2.6.6

root@iZ25xo8uaamZ:/opt/software/Python-2.7.9# python
-bash: /usr/bin/python: No such file or directory

python命令找不到，这时只需要将版本python2.7.9命令加入环境变量即可！

方式1：

修改/etc/profile加入如下两行：

PATH=$PATH:/usr/local/python2.7.9/bin
export PATH

然后

[root@localhost Python-2.7.9]# source /etc/profile

[root@localhost Python-2.7.9]# python -V
Python 2.7.9

当然也可以创建2.7.9版本的python的软连接：/usr/bin/python

[root@localhost ~]# ln -s /usr/local/python2.7.9/bin/python2.7 /usr/bin/python

亦可

ok，python升级完成

但运行python get-pip.py时，报错，原因是 python没有完全安装好，缺少ssl模块

修改 Modules/Setup文件：

# Socket module helper for socket(2)
_socket socketmodule.c timemodule.c

# Socket module helper for SSL support; you must comment out the other
# socket line above, and possibly edit the SSL variable:
#SSL=/usr/local/ssl
_ssl _ssl.c \
        -DUSE_SSL -I$(SSL)/include -I$(SSL)/include/openssl \
        -L$(SSL)/lib -lssl -lcrypto

重新编译

make && make install

又报错：ssl错误，原因是openssl-devel未安装

使用:

apt-get install openssl
apt-get install libdev-ssl

再次编译，搞定

第二步、安装pip  参见https://pip.pypa.io/en/latest/installing.html

To install pip, securely download get-pip.py. [2]

Then run the following (which may require administrator access):

python get-pip.py

pip被默认安装在：/usr/local/python2.7.9/bin/

 此时要注意pip版本的问题，之前的/usr/bin/pip可能是使用 apt-get install python-pip安装上的，

将/usr/bin/pip 升级为/usr/local/python2.7.9/bin/pip2.7：

ln -s /usr/local/python2.7.9/bin/pip2.7  /usr/bin/pip

 Ok，至此 pip安装环境构建成功！

第三步、安装python Django运行必须包 [可选]

1、安装MySQLdb

官网下载MySQL-python-1.2.3.tar.gz，解压安装

# python setup.py install

2、安装pillow

#pip install pillow

3、安装uwsgi [可选]

#pip install uwsgi

建立软链接：

# ln -s /usr/local/python2.7.9/bin/uwsgi /usr/bin/uwsgi