jotacor/tradunio ? reverse-engineered prompt

Build me a small Python tool for Comunio that helps me keep track of my team and my opponents, and tells me when it makes sense to sell or buy players.

I want to be able to run it from the command line to set everything up at first, then update the data later and get an email summary with my current team, the best players to sell, and the best players to buy. It should store the data in a database, and have a simple setup flow so I can initialize it and keep it updated on a server. If it needs current info or docs for the Comunio site, look them up online.

Make it practical and easy to run, with clear commands for initial setup, updates, and the sell or buy reports. If you can, include sensible defaults for email sending and make the output easy to read.