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List:       pypy-dev
Subject:    Re: [pypy-dev] Saving and reloading JIT optimizations
From:       Armin Rigo <arigo () tunes ! org>
Date:       2011-08-20 9:39:41
Message-ID: CAMSv6X2ZgZ+W2RZx1XH9u2HmbgVRTv3TM6cyM6xKD92jq60djQ () mail ! gmail ! com
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Hi Zooko,

On Fri, Aug 19, 2011 at 5:38 PM, Zooko O'Whielacronx <zooko@zooko.com> wrote:
> conservative method of determining if two classes are the same. For
> example: if they have identical Python source code and their
> superclasses are the same (in this sense).

This cannot be something you can rely on.  I can define Python classes
that have identical Python source code and superclasses, yet are
totally different.  For example,

    class A(object): pass
    A.foo = 42
    A1 = A
    class A(object): pass
    A.foo = 43
    A2 = A

So no, there is no way at all to make this idea work in general; you
can only do hacks that hopefully don't break too often.  I am not
interested :-)


A bientôt,

Armin.
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