Python-сообщество

 class base():
	def __init__(self, a):
		self.a = a
class child(base):
	def __init__(self, arg):
		base.__init__(self,arg+1)
x = child(2)
print(x.a)

 from datetime import date
class child2(date):
	def __init__(self, *args):
		print(self.year)
		#date.__init__(self,4,5,6)
x = child2(1,2,3)
print(x)

 class child2(date):
    def __init__(self, *args):
        self = super().__new__(self.__class__, *args)

 >>> '__init__' in dir(date)
True

 class child2(date):
	def __init__(self, *args):
		self = super().__new__(self.__class__, 4,5,6)
x = child2(1,2,3)
print(x)

 class child2(date):
    def __new__(cls, *args):
        return super().__new__(cls, 4, 5 ,6)