Class constants in python
Since Horse is a subclass of Animal, you can just change
print(Animal.SIZES[1])with
print(self.SIZES[1])Still, you need to remember that SIZES[1] means "big", so probably you could improve your code by doing something like:
class Animal: SIZE_HUGE="Huge" SIZE_BIG="Big" SIZE_MEDIUM="Medium" SIZE_SMALL="Small"class Horse(Animal): def printSize(self): print(self.SIZE_BIG)Alternatively, you could create intermediate classes: HugeAnimal, BigAnimal, and so on. That would be especially helpful if each animal class will contain different logic.
You can get to SIZES by means of self.SIZES (in an instance method) or cls.SIZES (in a class method).
In any case, you will have to be explicit about where to find SIZES. An alternative is to put SIZES in the module containing the classes, but then you need to define all classes in a single module.