class Things: pass class Inanimate(Things): pass class Animate(Things): pass class Animals(Animate): def breathe(self): print('breathing') def move(self): print('moving') def eat_food(self): print('eating food') class Mammals(Animals): def feed_young_with_milk(self): print('feeding young') class Giraffes(Mammals): def eat_leaves_from_trees(self): print('eating leaves') reginald = Giraffes() harold = Giraffes() reginald.move() harold.eat_leaves_from_trees()