1 class Square: 2 def __init__(self, wh): #因为是正方形, 只取一条边的长度 3 if isinstance(wh,(int,float)): 4 self.wh = wh 5 else: 6 raise TypeError 7 8 def __add__(self, other): 9 self_area = self.wh * self.wh #计算self面积 10 other_area = other.wh * other.wh #计算other面积 11 return self_area + other_area #相加 x+y 12 13 def __sub__(self,other): 14 self_area = self.wh * self.wh #计算self面积 15 other_area = other.wh * other.wh #计算other面积 16 return self_area - other_area #相减 x-y 17 18 def __mul__(self,other): 19 self_area = self.wh * self.wh #计算self面积 20 other_area = other.wh * other.wh #计算other面积 21 return self_area * other_area #相乘 x*y 22 23 def __mod__(self,other): 24 self_area = self.wh * self.wh #计算self面积 25 other_area = other.wh * other.wh #计算other面积 26 return self_area % other_area #相除 x%y 27 28 s1 = Square(3) 29 s2 = Square(4)