RPly: Python Lex/Yacc Parser Generator

RPly is a pure Python parser generator, offering a modern API and compatibility with RPython. It is a re-implementation of David Beazley's PLY library. RPly simplifies the process of building lexers (tokenizers) and parsers (syntax analyzers) for domain-specific languages or custom syntaxes. The current version is 0.7.8, and it has a relatively slow release cadence.