Python求平面内点到直线距离的实现

def get_point_line_distance(self, point, line):
  point_x = point[0]
  point_y = point[1]
  line_s_x = line[0][0]
  line_s_y = line[0][1]
  line_e_x = line[1][0]
  line_e_y = line[1][1]
  #若直线与y轴平行，则距离为点的x坐标与直线上任意一点的x坐标差值的绝对值
  if line_e_x - line_s_x == 0:
    return math.fabs(point_x - line_s_x)
  #若直线与x轴平行，则距离为点的y坐标与直线上任意一点的y坐标差值的绝对值
  if line_e_y - line_s_y == 0:
    return math.fabs(point_y - line_s_y)
  #斜率
  k = (line_e_y - line_s_y) / (line_e_x - line_s_x)
  #截距
  b = line_s_y - k * line_s_x
  #带入公式得到距离dis
  dis = math.fabs(k * point_x - point_y + b) / math.pow(k * k + 1, 0.5)
  return dis