安装ipython和虚拟环境
先epel-release这个包，
通过epel源安装pip：
yum install python-pip
然后pip install ipython==1.2.1
pip install ipython==1.2.1
DEPRECATION: Python 2.6 is no longer supported by the Python core team, please upgrade your Python. A future version of pip will drop support for Python 2.6
Collecting ipython==1.2.1
Downloading http://mirrors.aliyun.com/pypi/packages/42/a0/204ecd8b4e76f3399b51addbd39980ec5fa90275ff853879e25508030922/ipython-1.2.1.tar.gz (8.7MB)
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Installing collected packages: ipython
Found existing installation: ipython 5.3.0
Uninstalling ipython-5.3.0:
Successfully uninstalled ipython-5.3.0
Running setup.py install for ipython ... done
Successfully installed ipython-1.2.1
安装虚拟环境
# yum install -y python-virtualenv
# virtualenv env
# source env/bin/activate
# deactivate
第一个py
#!/usr/bin/python
print 'hello world'
