I made a web page where you can simulate a complex dice roll sequence with conditionals (e.g. re-roll when roll is a 1) using a Python-like syntax. (Click the "Toggle Syntax" button to view examples)
It needs a second to load because it has to load a Python interpreter in the background (I'm not good at web development) but once that's done, it works really well.
It's still very barebones and I still have to work out some problems.
Maybe some of you could use it, though.
There's also just the Python version available to run locally here
Everything is GPLv3, enjoy!
I am working on a dice expression evaluator on my side, and I will certainly reuse your code if I can ! Thanks for giving the example, as a GNU enthusiast, it is very nice ! Great job making it work !
Best of luck to you. I think my code is quite messy but if you can use any of it, feel free!