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

2009/7/18 Chris Rebert <pyideas@rebertia.com>:

A PEP is probably not be necessary just to add a class to the std lib. Counter was added without a PEP after all. You would need to convince the committers though.

For something like this, you could release your code as a separate module. Then let it get some popular support before asking for it to be promoted to the standard library. (Of course the proposed set changes might not be possible this way, but they are the most likely aspect to get rejected, because of backward compatibility concerns, in any case). Paul.