I hoped I could load my complete GUI via XRC, maybe using XRCed besides wxGlade. Since XRCed doesn’t work on my system anyway I resolved to "designing" my GUI in wxGlade, exporting to Python and copying to my actual GUI module what I need. (I was used to creating my GUI in code anyway.)
Params of Custom Widget breaks XRC export
multiplying elements on XRC Export
It works with Python 3.6.0 and wxPython 4.0.0b2
AttributeError on Preview Frame
NameError on startup (wxMac)