[Python-Dev] For Python 3k, drop default/implicit hash, and comparison

Guido van Rossum guido at python.org
Sun Nov 6 22:29:27 CET 2005

On 11/6/05, Phillip J. Eby <pje at telecommunity.com> wrote:
> At 12:58 PM 11/6/2005 -0800, Guido van Rossum wrote:
> >The main way this breaks down is when comparing objects of different
> >types. While most comparisons typically are defined in terms of
> >comparisons on simpler or contained objects, two objects of different
> >types that happen to have the same "key" shouldn't necessarily be
> >considered equal.
> When I use this pattern, I often just include the object's type in the
> key.  (I call it the 'hashcmp' value, but otherwise it's the same pattern.)

But how do you make that work with subclassing? (I'm guessing your
answer is that you don't. :-)

--Guido van Rossum (home page: http://www.python.org/~guido/)

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