[IronPython] Dictionary Ordering

[Michael Foord]

Hello all,

IronPython seems to default to have a dictionary 'ordering' based on key 
insertion order.

This is nice, but differs from the CPython implementation. However the 
spec (as I'm sure you're aware) says : (from 
http://docs.python.org/lib/typesmapping.html )

     Keys and values are listed in an arbitrary order which is 
non-random, varies across Python
    implementations, and depends on the dictionary's history of 
insertions and deletions.

So IronPython behaviour is well within the spec. My question is, can we 
rely on the ordered behaviour of IronPython ? (Or is it an 
implementation detail that may change in future versions ?)

Michael Foord
http://www.resolversystems.com