Arid: A Rust-Based Tool Built to Replace Pylint's Duplicate-Code Check

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A developer has released Arid, a Python duplicate-code detection tool written in Rust, designed as a focused alternative to Pylint's R0801 checker. Pylint's R0801 rule identifies similar lines across Python source files, but running the full Pylint analysis just for this one check can be slow, especially in large repositories. Unlike many lint rules that operate on a single file, duplicate-code detection requires a global view of the entire codebase, making it harder to parallelize without affecting results. Arid is not intended to replace Pylint or Ruff entirely, but instead handles only the duplicate-detection job, allowing Ruff to manage the broader linting workload. The tool is meant for teams that have already migrated most of their linting to Ruff but still rely on Pylint solely for its duplicate-code detection capability.

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