python assignment

Peter Hansen peter at engcorp.com
Wed Jul 23 16:06:06 CEST 2003


Grant Edwards wrote:
> 
> In article <slrnbhrqtj.9jf.bignose-hates-spam at iris.polar.local>, Ben Finney wrote:
> 
> >> What I need is an exact and unambiguous algorithm for determining when
> >> an assignment will change the id of the variable
> >
> > As I understand it, this is specific to the implementation of each type.
> > The only sensible way to code is as if the identity of an object, on
> > assignment, were completely unpredictable.
> >
> > The examples you gave showed that integers share identity with other
> > integers of the same value, while floats do not.
> 
> I believe that's only true for small integers, isn't it?

Google finds "LOADI - a fast load instruction for small positive integers 
(those referenced by the small_ints array in intobject.c)" and checking
that file is left as an exercise to the reader.  I'm going to blindly
assume this is directly related to the issue in question... ;-)

-Peter




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