This is a Python3 script to help assigning UV visible bands to transitions predicted by Tanabe-Sugano diagrams. The code is far away from professional, but it works.
The .csv files containing the Tanabe-Sugano transitions are derived from
R. J. Lancashire, http://wwwchem.uwimona.edu.jm/courses/Tanabe-Sugano/TSspread.html, accessed May 13, 2019