If it's literally going from rules to writing a grammar that is difficult to grok, perhaps this website might help for playing around (a bit like those regex we

If it's literally going from rules to writing a grammar that is difficult to grok, perhaps this website might help for playing around (a bit like those regex websites): http://instaparse-live.matt.is/ http://instaparse-live.matt.is/ With the syntax from Instaparse: https://github.com/Engelberg/instaparse/blob/master/README.md#notation https://github.com/Engelberg/instaparse/blob/master/README.m...