Using python and elixir to send emails utilizing db tables with foreign keys

I have a python script that pulls information from a single database table and sends a weekly update email to users. I'd like to find a way to modify my code to allow for normalizing the structure and putting all of the investigator info (prefix, fname, lname, and email) into it's own table. However, I'm not sure how to do this within the structure of the elixir model and my python code. Here is m