python的升级（2.6------>2.7.x)
如下地址：http://note.youdao.com/share/?id=2928aeda020123bfdf2a2c76bc75e4a7&type=note#/
转载自：http://www.noanylove.com/2014/10/centos-6-5-sheng-ji-python-he-an-zhuang-ipython/
代码如下：
#!/bin/bash
yum install -y gcc
yum install zlib-devel openssl-devel sqlite-devel
wget https://www.python.org/ftp/python/2.7.8/Python-2.7.8.tgz
tar -zxvf Python-2.7..tgz
cd Python-2.7.
./configure --prefix=/usr/local/python
make
make install
cd ~
mv /usr/bin/python /usr/bin/python2.
ln -sf /usr/local/python/bin/python2. /usr/bin/python
sed -i 's/#!\/usr\/bin\/python/#!\/usr\/bin\/python2.6/' /usr/bin/yum
wget https://bootstrap.pypa.io/get-pip.py
python get-pip.py
ln -sf /usr/local/python/bin/pip /usr/bin/pip
ln -sf /usr/local/python/bin/easy_install /usr/bin/easy_install
pip install ipython
ln -s /usr/local/python/bin/ipython /usr/bin/ipython
yum install readline-devel
yum install patch
pip install readline