rule-engine Expression Language

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library 4.5.3 ·en
verified May 27, 2026

rule-engine is a lightweight, optionally typed expression language with a custom grammar for matching arbitrary Python objects. It provides a simple way to define and evaluate complex rules against data, supporting various data types and custom functions. The current stable version is 4.5.3, with frequent patch releases and a v5 alpha in active development.

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