def _dist(self, x, y, A):
        "(x - y)^T A (x - y)"
        return scipy.spatial.distance.mahalanobis(x, y, A) ** 2
def _dist(self, x, y, A):
        "(x - y)^T A (x - y)"
        return scipy.spatial.distance.mahalanobis(x, y, A) ** 2
def _dist ( self , x , y , A ) : return scipy . spatial . distance . mahalanobis ( x , y , A ) ** 2
(x - y)^T A (x - y)
( x - y ) ^T A ( x - y )