Rewriting pycparser with the help of an LLM

· Eli Bendersky · Feb. 5, 2026, 4:01 a.m.
Summary
In this blog post, the author discusses their experience rewriting the widely-used open-source project pycparser, detailing the transition from using PLY (Python Lex-Yacc) for parsing to employing a Large Language Model (LLM) for improvements. The post aims to provide insights from their personal journey, the challenges faced during the process, and how the transition enhances the performance and utility of pycparser.
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