Why nested scope rules do not apply to inner Class?

[Cousson, Benoit]

Hi,

I'd like to be able to use a nested class (C1) from another sibling nested class (C3). This looks very similar to the nested scopes of functions except that it does not work.

class A(object):
	pass

class B(object):
	
	class C1(object):
		pass

	class C2(C1):
		foo = A

	class C3(object):
		foo = C1

The funny thing is that C2 can inherit from C1 but C3 cannot reference C1. B.C1 does not work either, but in that case it makes sense since B is still being defined. 
Is this a language limitation or something that does not make sense at all?

I'm wondering as well if the new nonlocal statement will fix that in py3k?

Thanks in advance,
Benoit