#安装python3.6的命令：
conda create -n py36 python=3.6 anaconda
#在成功安装python3.6之后，有如下提示：
To activate this environment, use:
# > activate py36
#
# To deactivate an active environment, use:
# > deactivate
#
# * for power-users using bash, you must source
#临时切换版本
source activate {环境名称}
例子：
source activate py36
