Why are there no ordered dictionaries?

Fuzzyman fuzzyman at gmail.com
Wed Nov 23 09:30:28 CET 2005


Bengt Richter wrote:
> On 22 Nov 2005 02:16:22 -0800, "Fuzzyman" <fuzzyman at gmail.com> wrote:
>
> >
> >Kay Schluehr wrote:
> >> Christoph Zwerschke wrote:
> >>
> >> > That would be also biased (in favour of Python) by the fact that
> >> > probably very little people would look for and use the package in the
> >> > cheese shop if they were looking for ordered dicts.
> >>
> >> Does anyone actually use this site? While the Vaults offered a nice
> >> place and a nice interface the Cheese Shop has the appeal of a code
> >> slum.
> >>
> >
> >Hmmm.. it's *the* repository for Python code. I expect quite a few
> >people use it...
> >
> >:-)
> >
> I hadn't realized how much stuff was there. I generally google for stuff,
> but I will be looking directly now.
>
> BTW, I made a mod[1] to your odict that I think/hope is going to be generally faster.
> It requires 2.4 though. It passes the same doctest, so its probably close to the same.
> It stores the ordering info differently, but is also a dict subclass.
>

odict maintains compatibility with Python 2.2 - so it's not a change
we'd put back into the module I don't think.

Changes that keep compatibility are very welcoemd though.

> Do you happen to have a timing test that exercises various aspects, so I can try it
> before I embarrass myself? Otherwise I guess I'll write something.
>

The only tests we have are the ones in the module.

If you create some timing tests we'd be interested in having access to
them though. They would be a useful addition.

All the best,

Fuzzyman
http://www.voidspace.org.uk/python/index.shtml

> Would the would-be users chime in with some idea of what kinds of operations are
> most important timing-wise? Which would get the most use? How dynamic would ordering typically be?
>
> [1] fairly pervasive little mods actually
> [ 9:15] C:\pywk\clp>diff    odict.py odictb.py |wc
>         146        458       4948
>
> [ 9:15] C:\pywk\clp>wc odict*.py
>         467       1228      12483       odict.py
>         511       1500      14728       odictb.py
>         978       2728      27211       Totals
> 
> Regards,
> Bengt Richter




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