Thought on PEP 204 and 276

[Steve Holden]

"phil hunt" <philh at comuno.freeserve.co.uk> wrote in message
news:slrnaf7mo4.dfe.philh at comuno.freeserve.co.uk...
> On Tue, 28 May 2002 16:00:12 +0200, holger krekel <pyth at devel.trillke.net>
wrote:
> >
> >that was precisely my argument on the python-dev list but
> >it got rejected by GvR personally ... "Trust me. Don't go there."
> >
> >I realize that mapping types and sequence types are quite different
> >despite appearances.  It may not be a good idea to blur the lines
> >between these two too much.
>
> I think they are essentially the same. A sequence tpye is just a
> mapping type where the keys are restricted to the integers from
> 0 to however many elements there are minus 1.
>
No matter what you think, they are essentially different. Insertion into a
mapping doesn't alter the key to which other elements are mapped, but
insertion into a sequence (potentially) does that.

[ ... ]
regards
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Steve Holden                                 http://www.holdenweb.com/
Python Web Programming                http://pydish.holdenweb.com/pwp/
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