descriptor dilemma

[Jeff Epler]

On Wed, May 04, 2005 at 09:14:18AM -0700, Sébastien Boisgérault wrote:
> 
> Yup ?!? Weird ... especially as:
> 
> >>> id(c.f) == id(C.__dict__['f'].__get__(c,C))
> True

Here, c.f is discarded by the time the right-hand-side of == is
executed.  So the object whose id() is being calculated on the
right-hand-side could turn out to be the same, since the two objects
have disjoint lifetimes.

Here are some more cases of the same thing:
>>> id([]) == id([])
1
>>> id([]) == id([1])
1

Jeff
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