CentOS6.9升级python2.6至2.7

####安装依赖：

yum groupinstall "Development tools"
yum install zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel 

####安装python2.7：

wget https://www.python.org/ftp/python/2.7.13/Python-2.7.13.tgz
tar -zxvf Python-2.7.13.tgz
cd Python-2.7.13
./configure --prefix=/usr/local
make && make altinstall
rm -f /usr/bin/python
#然后编辑/usr/bin/yum，将第一行的#!/usr/bin/python修改成#!/usr/bin/python2.6
ln -s /usr/local/bin/python2.7 /usr/bin/python

####查看版本：

python -V

####安装pip2.7：

wget https://bootstrap.pypa.io/get-pip.py
python get-pip.py
ln -s /usr/local/bin/pip2.7 /usr/bin/pip