Quantitative X-ray scattering and reflectivity measurements of polymer thin films with 2D detectors was recently published in the Journal of Polymer Science. In this publication by Mingqiu Hu*, Xuchen Gan*, Zhan Chen*, Hong-Gyu Seong*, Todd Emrick* and Thomas P. Russell*, researchers describe a fully open-sourced Python package to process raw X-ray scattering data using a GANESHA SAXSLAB facility, and review in this manuscript the connection of X-ray scattering theories with the open-sourced package.