[Python-Dev] Proposal: add odict to collections (original) (raw)

Alexander Schremmer 2008a at usenet.alexanderweb.de
Sun Jun 15 09:53:08 CEST 2008

Armin Ronacher wrote:

That's true, but by now there are countless of ordered dict implementations with a mostly-compatible interface and applications and libraries are using them already.

Even worse, most of them are slow, i.e. show a wrong algorithmic complexity ...

I have an example implementation here that incorporates the ideas from ordereddict, Django's OrderedDict and Babel's odict:

http://dev.pocoo.org/hg/sandbox/raw-file/tip/odict.py

... like your implementation. It is not too hard to get the delitem O(log n) compared to your O(n), see here:

http://codespeak.net/svn/user/arigo/hack/pyfuse/OrderedDict.py

So many people are implementing this kind of data type but do not really care about making as fast as it could be ... IMHO yet another reason to ship a usable implementation with Python.

Kind regards, Alexander

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