如何在我的类的2D Vector上使用点运算符，同时访问该类的函数？

class Vector2D:
    def __init__(self, x, y):
        self.x = x
        self.y = y

    def add(self, other):
        return Vector2D(self.x + other.x, self.y + other.y)

    def subtract(self, other):
        return Vector2D(self.x - other.x, self.y - other.y)

    def multiply(self, scalar):
        return Vector2D(self.x * scalar, self.y * scalar)

    def divide(self, scalar):
        return Vector2D(self.x / scalar, self.y / scalar)

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

    def __sub__(self, other):
        return self.subtract(other)

    def __mul__(self, scalar):
        return self.multiply(scalar)

    def __truediv__(self, scalar):
        return self.divide(scalar)

# 创建两个向量
v1 = Vector2D(1, 2)
v2 = Vector2D(3, 4)

# 使用点运算符进行向量运算
v3 = v1 + v2  # 等同于 v3 = v1.__add__(v2)
v4 = v1 - v2  # 等同于 v4 = v1.__sub__(v2)
v5 = v1 * 2   # 等同于 v5 = v1.__mul__(2)
v6 = v2 / 3   # 等同于 v6 = v2.__truediv__(3)

# 访问类的函数
v7 = v1.add(v2)
v8 = v2.subtract(v1)
v9 = v1.multiply(2)
v10 = v2.divide(3)