Create Python function for a ELO rating System

*Project Edited - now just after 1 function. The definition of a ELO rating system can be found here [login to view URL] I have a datasets from AFL sport and I would like a piece of code written that will take the a column and compute an ELO rating. Dataset: - AFL where match_margin is used as the column to compute. **This dataset is one row per team per match. With the function, I would like to be able to specify: - Score input (eg the match_margin column) - K Factor - anything else relevant And then output i would like to have columns attached to the same dataframe with: - Pre Match ELO For (Team) and Against (Opposition) i.e what it was before the match has been played. - Pre Match Probabilities based off the ELO difference between two sides - Post Match ELO (What it was after the match has been played). Here are two examples i have come across to help and there are more on the internet: [login to view URL] [login to view URL] And there are also python packages for ELO, but i havent been able to figure out how to make it work. The AFL Dataset is attached (ignore soccer dataset) Any questions let me kno!