Python 3发布3.5版本，看了PEP新特性，还是非常棒。安装python3.5，并搭建响应的环境。

安装python3.5

官网网站下载python3.5的mac安装文件。安装3的同时，是不会影响2.X的，两个版本可以共存啦。

创建 virtulenv 环境

安装python3.5之后，3.x版本的包响应也在后面加个3，例如 pip和pip3

☁  python3  python

python           python3            python3.4m        python3.5m-config

python-config      python3-32  python3.4m-config  pythons

python2.6     python3-config    python3.5    pythonw2.6

python2.6-config  python3.4   python3.5-32   pythonw2.7

python2.7   python3.4-32   python3.5-config    

python2.7-config  python3.4-config  python3.5m

☁  python3  which python/usr/bin/python

☁  python3  which python3/usr/local/bin/python3

☁  python3  which pip/usr/local/bin/pip

☁  python3  which pip3/usr/local/bin/pip3

需要创建一个 虚拟环境，运行：

virtualenv -p python3 venv

该命令使用系统的python3来创建虚拟环境，激活venv环境，查看python版本

☁  python3  source venv/bin/activate

(venv)☁  python3  which python/Users/ghost/Rsj217/python3/venv/bin/python

(venv)☁  python3  which python3/Users/ghost/Rsj217/python3/venv/bin/python3

(venv)☁  python3  pythonPython3.5.0(v3.5.0:374f501f4567, Sep122015,11:00:19)[GCC4.2.1(Apple Inc. build5666) (dot3)] 

on darwin    Type"help","copyright","credits"or"license"formore information.

>>>

此时虚拟环境使用的就是python3.5啦

安装ipython适合3.5的版本

激活venv虚拟环境，使用 pip3直接安装 ipython

(venv)☁  python3  pip3installipython...

(venv)☁  python3  which ipython/Users/ghost/Rsj217/python3/venv/bin/ipython

(venv)☁  python3  ipythonPython3.5.0

(v3.5.0:374f501f4567, Sep122015,11:00:19)Type "copyright", "credits" or  "license" for more information.

IPython4.0.0-- An enhanced Interactive Python.

?        -> IntroductionandoverviewofIPython's features.

%quickref -> Quick reference.

help      -> Python's ownhelpsystem.

object?  -> Details about'object' ,use 'object??' for  extra details.

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原文链接：http://www.jianshu.com/p/002c425041fb