Find all points within r of x
Parameters :  x : array_like, shape tuple + (self.m,)
r : positive float
p : float 1<=p<=infinity
eps : nonnegative float


Returns :  results : list or array of lists
Note: if you have many points whose neighbors you want to find, you may save : substantial amounts of time by putting them in a KDTree and using query_ball_tree. : 