[Python-Dev] PEP 372 -- Adding an ordered directory to collections ready for pronouncement

Raymond Hettinger python at rcn.com
Mon Mar 2 23:36:32 CET 2009

[Nick Coghlan]
> The examples in the PEP used 'odict' (until recently), but the patch was
> for OrderedDict.

As an experiment, try walking down the hall asking a few programmers who aren't in this conversion what they think 
collections.odict() is?
Is it a class or function?  What does it do?  Can the English as second language folks guess what the o stands for?  Is it a builtin 
or pure python?  My guess is that the experiment will be informative.

When we use the class, we typically only spell-out the constructor once while actually using the returned object many times.  So, 
have we really saved any typing?

In the context of other applications, which is clearer?

    json.loads(jtext, object_pairs_hook=odict)
    config = ConfigParser(dict_type=odict)


    json.loads(jtext, object_pairs_hook=OrderedDict)
    config = ConfigParser(dict_type=OrderedDict)

I find the former to be non-communicative.


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