While browsing some traceback error reporting i land on this solution threads. 

Specially beginner face traceback error for 
- KeyError
- IndexError (As mentioned in current message thread) 
- ValueError
..

It is sometime self explanatory from error reports but may be it can help to design some error document in python to more generalize errors.

Found some of traceback error with some possible cause explanations. Sharing if this is useful.  

https://github.com/pablorgarcia/Learn-to-program-with-Python-guide/blob/master/Understanding%20errors/IndexError-list-index-out-of-range.py

https://www.quizcure.com/python/traceback-most-recent-call-last-in-python#Keyerror-dictionary

https://stackoverflow.com/questions/64428188/deep-learning-chatbot-specific-index-error-list-index-out-of-range