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[Python-Dev] Why should the default hash(x) == id(x)?

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On 11/3/05, Greg Ewing <greg.ewing at canterbury.ac.nz> wrote:
> > 3. If someone does want to associate values with objects, he can
> > explicitly use id:
> > dct[id(x)] = 3.
>
> This is fragile. Once all references to x are dropped,
> it is possible for another object to be created having
> the same id that x used to have. The dict now
> unintentionally references the new object.
>
You are right. Please see the simple "ref" class that I wrote in my
previous post, which solves this problem.

Noam

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