1.安装一个新的python版本
conda create --name py3.6 python=3.6
conda create --name py2.7 python=2.7
2.选择启用某个版本的python环境
activate py2.7 # windows
source activate py2.7 # linux/mac
3.显示当前已安装的环境name
conda info --envs
# conda environments:
#
py3.4 * D:\Software\Anaconda\envs\py3.4
python27 D:\Software\Anaconda\envs\python27
root D:\Software\Anaconda
4.切换python环境
activate py3.6 # windows
source activate 3.6 # linux/mac
