skeleton class needs working instantiation guard

[hereathome]

I've created a skeleton Point class for points in a 3D space (e.g. with x, y, and z co-ordinates). I want the co-ordinates to be integers and for any other input value to be refused. That part works fine. I just can't figure out a way to have the class constructor refuse to initialize an object if any of the three inital values is not an integer. How do I do that? Here's my code so far:

class Point:

    def __init__(self, x, y, z):
        self.x = x
        self.y = y
        self.z = z

    @property
    def x(self):
        return self.__x

    @x.setter
    def x(self, a):
        if isinstance(a, int):
            self.__x = a
        else:
            print("x must be an integer")
            return None

    @property
    def y(self):
        return self.__y

    @y.setter
    def y(self, b):
        if isinstance(b, int):
            self.__y = b
        else:
            print("y must be an integer")
            return None

    @property
    def z(self):
        return self.__z

    @z.setter
    def z(self, c):
        if isinstance(c, int):
            self.__z = c
        else:
            print("z must be an integer")
            return None

[hshivaraj]

Just raise an exception, like so

class Point:
 
    def __init__(self, x, y, z):
        self.x = x
        self.y = y
        self.z = z
 
    @property
    def x(self):
        return self.__x
 
    @x.setter
    def x(self, a):
        if isinstance(a, int):
            self.__x = a
        else:
            raise AttributeError("x must be an integer")
 
    @property
    def y(self):
        return self.__y
 
    @y.setter
    def y(self, b):
        if isinstance(b, int):
            self.__y = b
        else:
            raise AttributeError("y must be an integer")
 
    @property
    def z(self):
        return self.__z
 
    @z.setter
    def z(self, c):
        if isinstance(c, int):
            self.__z = c
        else:
            raise AttributeError("z must be an integer")

p = Point(1, 2, 3.5)

[hereathome]

I tried this:

b = Point(0.5, 3, -7)

With this result:

TypeError: __init__() missing 1 required positional argument: 'z'

While that attained my goal of not having the Point object instantiated with one or more invalid parameters, the error message is confusing. Is there something I can do about that?

[hshivaraj]

That peculiar. Could you post your class Point again?
I dont that error message, and see the expected behaviour.

b = Point(0.5, 3, -7)

Output:
Traceback (most recent call last):
  File "main.py", line 41, in <module>
    b = Point(0.5, 3, -7)
  File "main.py", line 4, in __init__
    self.x = x
  File "main.py", line 17, in x
    raise AttributeError("x must be an integer")
AttributeError: x must be an integer
exited with non-zero status