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Newsgroups: comp.lang.python
Date: Mon, 13 Feb 2012 09:18:16 -0800 (PST)
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Subject: Re: package extension problem
From: Miki Tebeka <miki.tebeka@gmail.com>
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Xref: x330-a1.tempe.blueboxinc.net comp.lang.python:20352

> B[some_hash] still returns an instance of the old class A, while I want 
an instance of the new class A. 
I don't understand this sentence. How does B[some_hash] related to A?

I've tried the below and it seems to work. Can you paste some code to help us understand more?

-- old.py --
class A:
    pass

-- new.py __
import old
class A(old.A):
    pass

-- main.py --
import new
a = new.A()
a.__class__ # Shows new.A