This is cool. Many times I needed a JSON parser and didn't want to pull in a large dependency. This is 1,200 lines of C code and even avoids allocations, as a bonus.

It used @SymPy, not NumPy. When I started SymPy almost 20 years ago, my university classmates were telling me that it could never match Mathematica, so what's the point? And now the most popular (?) LLM uses SymPy by default. That's amazing! -