四、安装python2.7.9
tar zxvf Python-2.7.9.tar.xz
cd Python-2.7.9
./configure --prefix=/usr/local/python
make && make install
ln -sv /usr/local/python/bin/python2.7 /usr/bin/python279
五、安装ipython3.1.0
tar zxvf ipython-3.1.0.tar.gz
cd ipython-3.1.0
python279 setup.py build
python279 setup.py install
ln -sv /usr/local/python/bin/ipython /usr/bin/