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需要在类中重新定义几个方法:

 
    # 重载加法 
    def __add__(self, other): 
        print("__add__ are called") 
        obj = Mynum(self.data + other.data) 
        return obj 
    #重载减法__sub__ 
    def __sub__(self,other): 
        print("__sub__ are called") 
        obj = Mynum(self.data - other.data) 
        return obj 
    #乘法重载___mul__    _ 
    def __mul__(self, other): 
        print("__mul__ are called") 
        obj = Mynum(self.data * other.data) 
        return obj 
  
    #除法重载___divmod__ 
    def __truediv__(self, other): 
        print("__diymod__ are called") 
        obj = Mynum(self.data / other.data) 
        return obj 
    #地板除: __floordiv__ // 
    def __floordiv__(self, other): 
        print("__floordiv__ are called") 
        obj = Mynum(self.data // other.data) 
        return obj 
    #取模(求余数)  __mod__  % 
    def __mod__(self, other): 
        print("__mod__ are called") 
        obj = Mynum(self.data % other.data) 
        return obj 
    #__pow__ 幂运算 ** 
    def __pow__(self, power, modulo=None): 
        print("__pow__ are  called") 
        obj = Mynum(self.data ** power.data) 
        return obj 
 
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原文链接：https://blog.csdn.net/JSWANGCHANG/article/details/90739161