Python 3发布3.5版本，看了PEP新特性，还是非常棒。安装python3.5，并搭建相应的环境。
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 pythonw 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 python Python 3.5.0 (v3.5.0:374f501f4567, Sep 12 2015, 11:00:19) [GCC 4.2.1 (Apple Inc. build 5666) (dot 3)] on darwin Type "help", "copyright", "credits" or "license" for more information. >>>
此时虚拟环境使用的就是python3.5啦。
推荐学习《python教程》。
