Good work Amaury! :)

I also wonder how type(cls) != cls.__class__ is possible with new style
classes. So far I found only one way and it ain't beautiful:

>>> class Meta(type):
...     def __getattribute__(self, key):
...         if key == "__class__": return object
...         return type.__getattribute__(self, key)
...
>>> class Example(metaclass=Meta): pass
...
>>> Example.__class__
<type 'object'>
>>> type(Example)
<class '__main__.Meta'>