> Actually, I initially used DictMixin and that "worked" for the pages I looked 
> at manually but tests failed because there's specific code that calls 
> isinstance(dict) and UserDict does not subclass dict. Java is much better is 
> this regard since there's standard collection interfaces everything can 
> subclass from :-) Also, to my mind, now that Python supports subclassing dict 
> directly there's little reason to continue using UserDict? Lastly, the few 
> boilerplate methods that are there are actually necessary to make the class 
> behave as expected when methods like values(), items() etc are called and any 
> as yet unconstructed values need to be instantiated.
>
> I assume then that you are happy with the change in exception type for broken 
> links? ie LocationError instead of KeyError. The only way to fix it is to 
> modify the zope source code.

I think we should fix the zope source code, for sure. That said I
think handling LocationError in the test is fine.
-- 
https://code.launchpad.net/~wallyworld/launchpad/improve-menu-rendering/+merge/38222
Your team Launchpad code reviewers is requested to review the proposed merge of 
lp:~wallyworld/launchpad/improve-menu-rendering into lp:launchpad/devel.

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