[WIP] Improve typed dict KeyError traceback #9530
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While coding a parallel implementation with Numba that used typed dict, I had a lot of trouble debugging because the KeyError exception did not return any information. I made a small change in the dictobject.py to return the key value and type on the traceback, and it helped a lot. This commit includes this modification.
However, it would have been better if the traceback pointed to the actual python line where the KeyError occurred, though I don't know if this is possible, or how to do it. I'm creating this PR as WIP in hope I can get some insight on this viability.