由于系统已有2.6的python，最好不好修改系统的版本，使用编译安装
下载Python3.6.1包
wget https://www.python.org/ftp/python/3.6.1/Python-3.6.1.tar.xz
安装依赖：
yum -y install readline-devel
解压Python-3.6.1.tar.xz
xz -d Python-3.6.1.tar.xztar -xvf Python-3.6.1.tar
编译安装，指定/usr/local/python361目录
cd Python-3.6.1./configure --prefix=/usr/local/python361make && make install
创建软链接
[root@kurol bin]# ln -s /usr/local/python361/bin/python3.6 /usr/bin/python36
安装ipython，使用国内豆瓣源，速度快。
python36 -m easy_install -i http://pypi.douban.com/simple/ ipython
测试ipython
[root@kurol ~]# ipython
/usr/local/python361/lib/python3.6/site-packages/ipython-6.1.0-py3.6.egg/IPython/core/history.py:226: UserWarning: IPython History requires SQLite, your history will not be saved
warn("IPython History requires SQLite, your history will not be saved")
Python 3.6.1 (default, Jun 1 2017, 11:21:44)
Type 'copyright', 'credits' or 'license' for more information
IPython 6.1.0 -- An enhanced Interactive Python. Type '?' for help.
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