《python语言程序设计》2018版第6章第20题几何问题，显示角 使用distance函数计算两点之间的距离

def distance(x1, y1, x2, y2):
    x1, y1 = eval(input("Enter x1 and y1 for point1: "))
    x2, y2 = eval(input("Enter x2 and y2 for point2: "))

    distance_t = ((x1 - x2) * (x1 - x2) + (y1 - y2) * (y1 - y2)) ** 0.5

    print("The distance between the two points is", distance_t)