Python-сообщество

 class MyClass:
    var_one = 'class '
    var_two = ['class']
    var_three = ['', '']
    def __init__(self):
        pass

 class OneClass(MyClass):
    def __init__(self):
        self.var_one += ' One'
        self.var_two.append('One')
        self.var_three[0] = 'One'
 class TwoClass(MyClass):
    def __init__(self):
        self.var_one += ' Two'
        self.var_two.append('Two')
        self.var_three[1] = 'Two'

 classOne = OneClass()
 classTwo = TwoClass()

 print(classOne.var_one) > class One
 print(classOne.var_two) > ['class', 'One', 'Two']
 print(classOne.var_three) > ['One', 'Two']