Nested inner classes and inheritance -> namespace problem

Wed Apr 13 05:12:30 EDT 2011

The problem: if you're currently in a nested class, you can't look up 
variables in the outer "class scope".
For example, this code fails in Python 3:
 class Outer:
 class Inner:
 class Worker:
 pass
 class InnerSubclass(Inner):
 class Worker(Inner.Worker):
 pass
It fails at the definition of Worker inside InnerSubclass. Python 3 
can't find "Inner", in order to get to "Inner.Worker".
Adding "global Inner" just above that line doesn't help--it's not a global.
Adding "nonlocal Inner" just above that line doesn't help either--I 
suppose it's the /wrong kind/ of nonlocal. nonlocal is for nested 
functions, and this uses nested classes.
You can tell me YAGNI, but I tripped over this because I wanted it. 
It's not a contrived example. I actually use inner classes a lot; I 
suppose I'm relatively alone in doing so.
Yes, I could make the problem go away if I didn't have nested inner 
classes like this. But I like this structure. Any idea how I can make 
it work while preserving the nesting and inheritance?
Thanks,
/larry/
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