What is your question?
What is the difference between using lark vs sexpdata for parsing s-expressions?
related: https://github.com/jd-boyd/sexpdata/issues/27
If you're having trouble with your code or grammar
No issues. Just curious.
sexpdata is specialized for s-expressions, lark is a general EBNF parsing library. With lark you have to write the grammar yourself. If sexpdata is optimized for performance, it will be faster.
I'll just add the obvious, that with Lark it would then be possible to extend the syntax.