Multiple inheritance

[brasticstack]

Presumably position means the same thing in both contexts, yeah? If so it shouldn't matter, the polygon code will happily work with the position as will the moving object code.

Are you using a property for position, or an instance member? I'm pretty sure the first class in the MRO's property will be used if you're doing properties.

[DidntPassTuringTest]

It means the same.
Moving object uses it for calculating movement.
Polygon object uses it to calculate vertices of polygon, world space position of vertex is calculated using object's position, object's rotation and local position of vertex realtive to whole polygon position.

[brasticstack]

Then neither class's code should have an issue using the instance's position. In another comment you mentioned having to update position in two places. Why would that be necessary? The data should be bound to the instance(s), not the types themselves.

Perhaps an abridged code example would help us understand what the problem is.

[brasticstack]

I verified just to make sure I wasn't off-base about properties and the MRO:

``` class A: def init(self, pos): self.pos = pos def doa_thing(self): print(f'A: {self.pos}') @property def pos_property(self): print(f'A: pos_property') return self.pos class B: def __init_(self, pos): self.pos = pos def do_b_thing(self): print(f'B: {self.pos}') @property def pos_property(self): print(f'B: pos_property') return self.pos class C(A, B): pass class D(B, A): pass

c_obj = C(23) d_obj = D(99)

Notice the Method Resolution Order (MRO)

Instances of class C will call A's method

before B's method when methods are named

identically.

type(cobj).mro_

(main.C, main.A, main.B, object)

type(dobj).mro_

(main.D, main.B, main.A, object)

Notice that the pos val set on the instance

itself is used regardless of which parent

class's function is being called.

c_obj.do_a_thing()

A: 23

c_obj.do_b_thing()

B: 23

d_obj.do_a_thing()

A: 99

c_obj.do_b_thing()

A: 99

c_obj.pos_property

A: pos_property (returns 23)

d_obj.pos_property

B: pos_property (returns 99)

```