[issue17100] rotating an ordereddict

[Raymond Hettinger]

Raymond Hettinger added the comment:

My only attraction to adding any of the rotate variants is that they provide functionality that can't be done efficiently by a user without access to the underlying data structure.

However, looking only at the API, the methods seem a bit awkward and a bit at odds with how people think of ordered dicts (rotate is not a method that comes to mind for my mental model).   

When I built the OD code, I looked at many existing implementations (in Python and other languages), and I don't recall seeing rotation in any of them.

In the absence of strong use cases, I prefer to keep the API thin so that OD's remain easy to learn and remember.

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priority: normal -> low

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<http://bugs.python.org/issue17100>
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