Lark, a modern parsing library with Earley and LALR(1) implementations
Lark is a parsing toolkit for Python, built with a focus on ergonomics, performance and modularity. - lark-parser/lark
Lark, a modern parsing library with Earley and LALR(1) implementations launched on February 14, 2017 with 15 votes, #818 of 3,156 launches that month and more than 75% of that year's launches. The site was still online in September 2026, 9 years on.
In plain words
Lark is a parsing library that helps developers build language parsers and interpreters. It offers two parsing algorithms—Earley and LALR(1)—allowing users to choose between flexibility and speed depending on their needs. The library is designed for anyone working with grammar-based text processing, from building domain-specific languages to creating simple command interpreters. Its dual-algorithm approach and modern design make it suitable for both simple and complex parsing tasks.
written from the facts on this page · September 2026
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