Inverse of id()?

[Michael Hoffman]

Gabriel Genellina wrote:
> En Sat, 19 May 2007 20:42:53 -0300, Paul McGuire <ptmcg at austin.rr.com> 
> escribió:
> 
>>>>> z = id(results)
>>>>> for x in globals().values():
>> ...   if id(x)==z: break
>> ...
>>
>> This gives me a variable x that is indeed another ref to the results
>> variable:
>>>>> x is results
>> True
>>>>> x.x
>> 123
>>
>> Now is there anything better than this search technique to get back a
>> variable, given its id?
> 
> py> class A:pass
> ...
> py> class B:pass
> ...
> py> a=A()
> py> id(a)
> 10781400
> py> del a
> py> b=B()
> py> id(b)
> 10781400
> 
> Now if you look for id=10781400 you'll find b, which is another, 
> absolutely unrelated, object.

That's not what I get:

Python 2.5 (r25:51908, Mar 13 2007, 08:13:14)
[GCC 3.4.4 (cygming special, gdc 0.12, using dmd 0.125)] on cygwin
Type "help", "copyright", "credits" or "license" for more information.
 >>> class A: pass
...
 >>> class B: pass
...
 >>> a = A()
 >>> id(a)
2146651820
 >>> b = B()
 >>> id(b)
2146651948
-- 
Michael Hoffman