def METHOD_NAME(location_1, location_2):
    """
    Returns the unit vector from location_1 to location_2
        :param location_1, location_2: carla.Location objects
    """
    x = location_2.x - location_1.x
    y = location_2.y - location_1.y
    z = location_2.z - location_1.z
    norm = np.linalg.norm([x, y, z]) + np.finfo(float).eps
    return [x / norm, y / norm, z / norm]