numpy.ufunc.at failed one build, so mod to conform
numpy.ufunc.at failed one build, so mod to conform

nilgoyyou/dipy,matthieudumont/dipy,FrancoisRheaultUS/dipy,matthieudumont/dipy,villalonreina/dipy,nilgoyyou/dipy,villalonreina/dipy,FrancoisRheaultUS/dipy