def euclidian_distance(self, e1, e2):
    '\n        https://stackoverflow.com/questions/1401712/how-can-the-euclidean-distance-be-calculated-with-numpy\n        '
    return np.linalg.norm((e1 - e2))
https://stackoverflow.com/questions/1401712/how-can-the-euclidean-distance-be-calculated-with-numpy
def euclidian_distance(self, e1, e2):
    '\n        \n        '
    return np.linalg.norm((e1 - e2))