which Design Pattern can be used?

I have 3 classes, they inherit from parent class. A parameter in the init method of the child classes is used to define in parent to set a parameter an define how a method is called.

class Parent(object):

    def __init__(self, marker):
        self.executeCode(marker)


class ClassA(Parent):

    def __init__(self, marker):
        super(ClassA, self).__init__("class_a")


class ClassB(Parent):

    def __init__(self, marker):
        super(ClassB, self).__init__("class b")


class ClassC(Parent):
    def __init__(self, marker):
        super(ClassC, self).__init__("class c")

Which is the best pattern to use here, to make it more pythonic?