Class variable inheritance

Tue Sep 8 09:52:48 EDT 2009

HPJ wrote:
>> Makes sense to me. To step through what's happening:
>>>>>>> A.n, B.n
>> (0, 0)
>>>> Here, the lookup on B.n fails (that is, B itself has no variable n),
>> and thus falls back to A.n
>> See, this is what tripped me up, right at the beginning. I thought B
> would inherit (as in copy) the variable n from A.

Python does not copy objects unless asked to.
Inheritance is a link request, not a copy request.
> Can you point out to me which part (or parts) of the Language
> Reference says this is the way it's supposed to be?

I could, but I will let you read and find what it says about class 
attributes.
tjr