Metaclass of a metaclass

metametaclass.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-
# Created on Sat Oct 13 by Danilo de Jesus da Silva Bellini
#
# This code raises:
# TypeError: Can't instantiate abstract class A with abstract methods blablah
# However, it does not when class A inherits from "type" or "ABCMeta".
from abc import ABCMeta, abstractproperty

class A(object):
  __metaclass__ = ABCMeta

  def __init__(self, a_string, a_tuple, a_dict):
    pass

  @abstractproperty
  def blablah(self):
    return "blah!"

something = A("UnnamedClass", (ABCMeta,), {})