Python TypeError：不支持的操作数类型为*：'Vector2'和'int'

Question

我试图创建一个Vector2类。 当我尝试键入

vec1 = Vector2() 
vec2 = vec1 * 5 

它给我的错误：

TypeError: unsupported operand type(s) for *: 'Vector2' and 'int' 

是不是有什么毛病我运算符重载？

class Vector2(object): 

def __init__(self, x = 0.0, y = 0.0): 
    self.X = x 
    self.Y = y 

def __add__(self, other): 
    if isinstance(other, Vector2): 
     new_vec = Vector2() 
     new_vec.X = self.X + other.X 
     new_vec.Y = self.X + other.Y 
     return new_vec 
    else: 
     raise TypeError("value must be a vector.") 

def __radd__(self, other): 
    return self.__add__(other) 

def __sub__(self, other): 
    new_vec = Vector2() 
    new_vec.X = self.X - other.X 
    new_vec.Y = self.Y - other.Y 

def __mull__(self, value): 
    new_vec = Vector2() 
    new_vec.X = self.X * value 
    new_vec.Y = self.Y * value 
    return new_vec 

def __rmull__(self, value): 
    return self.__mull__(value) 

def __div__(self, value): 
    new_vec = Vector2() 
    new_vec.X = self.X/value 
    new_vec.Y = self.Y/value 
    return new_vec 

def dot(vector1, vector2): 
    return ((vector1.X * vector2.X) + (vector1.Y + vector2.Y)) 

Answer 1

是不是__mul__而不是__mull__？将__mull__替换为__mul__，然后重试。