centos 安装Python2.7

centos默认安装的是Python2.6版本，有些模块使用会出错，这里是我安装Python2.7.9的全部过程

首先需要安装Development tools

yum groupinstall "Development tools"

安装编译Python需要的依赖包

yum install zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel -y

下载并解压Python 2.7.9的源代码

cd /opt
wget --no-check-certificate https://www.python.org/ftp/python/2.7.9/Python-2.7.9.tar.xz
tar xf Python-2.7.9.tar.xz
cd Python-2.7.9

编译与安装Python 2.7.9

./configure --prefix=/usr/local
make && make altinstall

将python命令指向Python 2.7.9

ln -s /usr/local/bin/python2.7 /usr/local/bin/python

检查Python版本

python -v

安装PIP

wget https://bootstrap.pypa.io/get-pip.py
python get-pip.py

至此，Python2.7与pip都安装完成。