inheriting variables

[Haran Shivanan]

This seems like a fairly straight forward thing but I'm not sure about how
to implement it.
I have a base class from which I'm deriving several new classes:
class A:
	mem_a=0
	mem_b=1
class B(A):pass

I want B to inherit mem_a and mem_b from A without my having to explicit do
something like:

self.mem_a = 0

in the constructor for class B.
Basically, when I want to add a membership variable to all classes that
inherit from A, and I want to do it without manually editing all the class
definitions\constructors.

Currently I'm doing:
class B(A):
	def __init(self):
		for k in A.__dict__.keys():
			self.__dict__[k] = A.__dict__[k]
	...

This is somewhat crude. Also it does wierd things with methods declared in
A. Is there some really obvious clean implementation I'm missing?

Thanks.
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