TatSu: PEG Parser Generator

TatSu is a Python library that takes a grammar defined in a variation of EBNF (Extended Backus–Naur Form) and generates a memoizing PEG (Parsing Expression Grammar) / Packrat parser. It is actively maintained with frequent minor releases, providing a powerful tool for creating custom parsers and Abstract Syntax Trees (ASTs). The current version is 5.18.0.