See Santosh's answer as that seems like the best I'm not aware of a simple way of doing this using EPPY.

This EPPY, however, this can also easily be done easily using Modelkit. I just published a demo video on this exact problem.

You would just need to modify your IDF file so that it has no Design Day objects. Then your root file would be just a couple lines, inserting your IDF file and the location parameter. Check out the video, and the subsequent video on rakefiles, and let me know if you have any questions.