import math


def get_distance(p1, p2):
    """
    计算两点间的距离
    :param p1:
    :param p2:
    :return:
    """
    return math.sqrt((p1.X - p2.X) ** 2 + (p1.Y - p2.Y) ** 2+ (p1.Z - p2.Z)**2)