C:\Python36\Scripts>mkvirtualenv -p C:\Python27\python.exe C:\weixin_app27
(weixin_app27) C:\weixin_app27\Scripts>activate
(weixin_app27) C:\weixin_app27\Scripts>deactivate # 退出虚拟环境
C:\weixin_app27>workon # 列出所有创建的虚拟环境
Pass a name to activate one of the following virtualenvs:==============================================================================
weixin_app27
C:\weixin_app27>workon weixin_app27 # 进入一个虚拟环境(weixin_app27) C:\weixin_app27>