I programmed a full resource database with observer design pattern between resource (image for example) and database, database uses python dictionary default in base class (which can be changed underneath), widget system and player char image resource graphics.

Everything is in http://github.com/zork9/assassinoftheunderdark
and latest python source code tarballs in :
https://sourceforge.net/projects/assassinoftheunderdark/files/Python%20Source/?