I was trying to port an app I already had in c# with wpf to be cross platform, so some networking code could be shared, but I could still use xaml and all the wpf work that I already had (although it wasn't that extensive, just tried for the sake of learning), I also used some audio apis, and with IronPython i could call c# code and use NAudio, so in the end I couldn't do what I wanted with just CPython