theano提示:g++ not detected的解决办法

import theano

出现：

WARNING (theano.configdefaults): g++ not detected ! Theano will be unable to execute optimized C-implementations (for both CPU and GPU) and will default to Python implementations. Performance will be severely degraded. To remove this warning, set Theano flags cxx to an empty string.      

直接CMD中输入

conda install mingw libpython