No mappingproxy implementation?

[jruiss]

I'm trying to check class attributes with Class.__dict__ with python3, and there seems to be nothing I can do with the returned mappingproxy.

It can't be cast into a PyDict, using call_method "items" or "keys" returns dict_items, dict_keys which in turn cannot be cast into PyDict, PyList or PySequence.

Even calling Class.__dict__.__iter__() and trying cast into PyIterator didn't work.