Also sprach Jean-Marc Lasgouttes:
Yes, I still have this message marked in my inbox. But you didn't yet propose a working python code, did you?OTOH JMarc's idea of using a test file strikes me not too bad.In my mind this is the same idea. Lime what is done in checkLatex().
I thought that Günter wanted to parse fontspec.sty for the date. Jürgen