I am fairly new to OOP in Python. In a program, I have two types of class:

```
class Character:
    ... etc. ...

```

[`Character1` and `Character2` are instances of this]

and

```
class Room:
    ... etc. ...

```

[`Room1` and `Room2` are instances of this]

I want to have a variable `pos` for each `Character` and `Room` such that there is one attribute `pos` for each possible combination of the two classes:

For example:

```
Character1 with Room1 --> pos = (10, 4)
Character2 with Room1 --> pos = (6, 10)
Character1 with Room2 --> pos = (3, 12)
Character2 with Room2 --> pos = (7, 5)

```

Is there a simple way to create an attribute for a combination of classes as I have described? I have looked around the internet and have not found a way to do it.

Thanks in advance.