class Point: def __init__(self, x, y): self.__x = x self.__y = y def __add__(self, other): x = self.__x + other.__x y = self.__y + other.__y return Point(x, y) def __sub__(self, other): x = self.__x - other.__x y = self.__y - other.__y return Point(x, y) def __mul__(self, a): x = self.__x * a y = self.__y * a return Point(x, y) def __truediv__(self, a): x = self.__x / a y = self.__y / a return Point(x, y) r1 = Point(10, 20) r2 = Point(5, 5) print(r1+r2) print(r1-r2) print(r1*2) print(r1/2)代码改进，输出向量坐标

为了输出向量坐标，我们可以在 Point 类中添加一个方法来返回坐标的元组，如下所示：

class Point:
    def __init__(self, x, y):
        self.__x = x
        self.__y = y
    
    def __add__(self, other):
        x = self.__x + other.__x
        y = self.__y + other.__y
        return Point(x, y)
    
    def __sub__(self, other):
        x = self.__x - other.__x
        y = self.__y - other.__y
        return Point(x, y)
    
    def __mul__(self, a):
        x = self.__x * a
        y = self.__y * a
        return Point(x, y)
    
    def __truediv__(self, a):
        x = self.__x / a
        y = self.__y / a
        return Point(x, y)
    
    def get_coordinates(self):
        return (self.__x, self.__y)

然后我们就可以使用这个方法来输出向量坐标了，示例如下：

r1 = Point(10, 20)
r2 = Point(5, 5)

print(r1+r2.get_coordinates())  # 输出 (15, 25)
print(r1-r2.get_coordinates())  # 输出 (5, 15)
print(r1*2).get_coordinates())  # 输出 (20, 40)
print(r1/2).get_coordinates())  # 输出 (5.0, 10.0)