Python OOP. Multi inheritance. Property как делать?

class Point:
    _x = None
    _y = None
 
    @property  # getter
    def x(self):
        return self._x
 
    @x.setter
    def x(self, value):
        if not isinstance(value, int):
            raise TypeError
        self._x = value
 
    @property  # getter
    def y(self):
        return self._y
 
    @y.setter
    def y(self, value):
        if not isinstance(value, int):
            raise TypeError
        self._y = value
 
    def __init__(self, x_coord, y_coord):
        self.x = x_coord
        self.y = y_coord
 
 
point1 = Point(0, 3)
point1.x = 100
point2 = Point(4, 0)
 
 
class Line:
 
    begin = None
    end = None
 
    def __init__(self, begin_point: Point, end_point: Point):
        self.begin = begin_point
        self.end = end_point
 
    @ property
    def length(self):
        print('in length_getter')
        return ((self.begin.x - self.end.x) ** 2 + (self.begin.y - self.end.y) ** 2) ** 0.5
 
 
line1 = Line(point2, point1)
 
print(line1.length)

    def __init__(self, begin_point: Point, end_point: Point):
        if not isinstance(begin_point, Point) or not isinstance(end_point, Point):
            raise TypeError
        self.begin = begin_point
        self.end = end_point