Hi, @frederik:
why generate a binary and read the the binary back in? see f1.generate("otfcff", "f1.otf")
You mean I can use the opened ufo files right away as f1 and f2 to interpolate with, right?
Give you new font a unique name based on the interp_factor. The font familyName and styleName makes up the postScriptName which has to be unique to set a font in drawBot (and everywhere else). In your case the font familyName and styleName will be "None" "None". This is not good...
All right. I thought that after uninstalling the interpolated font I could generate another one I could use in the new page afterwards. So, in this case, would it make sense to set the same name for familyName while the styleName could be related to inerp_factor as you say?