An overridden method called from the parent __init__

class Base:
    def __init__(self):
        self.setup()

    def setup(self):
        print("base setup")

class Child(Base):
    def __init__(self):
        super().__init__()
        self.size = 5

    def setup(self):
        print("child setup, has size:", hasattr(self, "size"))

c = Child()
c.setup()