[Python-ideas] Proposal for extending the collections module - bags / multisets, ordered sets / unique lists

[Michael Lenzen]

I was thinking of submitting a PEP, but I wanted to get feedback first 
and finish up my reference implementation.

-Michael Lenzen
http://code.google.com/p/python-data-structures/wiki/collections

On 07/18/2009 01:03 PM, Mart Sõmermaa wrote:
> I drove a similar discussion a few months ago (April or May), nobody
> was opposing then, so I'd say go ahead and file a feature request.
>
> Of course, I'm personally strongly +1, especially for ordered set/unique list.
>
> Various implementations:
>
> http://code.activestate.com/recipes/576694/
> http://www.peterbe.com/plog/uniqifiers-benchmark/
>
> A list with no duplicate values is a common problem judging on the following:
>
> http://www.google.com/codesearch?q=lang%3Apython+list+unique
> http://www.google.com/codesearch?q=lang%3Apython+list+duplicates
> http://code.activestate.com/recipes/52560/
> http://www.google.com/search?q=python+unique+list
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