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Modeleon – Python DSL that compiles to live Excel formulas
Python code compiles to real Excel formulas with automatic dependency graphs.
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adilkhanovkz
501mo ago
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Koalify – a compact predicate DSL for filtering any Python object
by afterburner5·Mar 15, 2026·4 points·1 comment
AI Analysis
●●SolidCozyNiche Gem
Nine years of predicate logic distilled into a zero-dependency Python DSL.
Strengths
- •Zero dependencies, works with Pydantic models, dataclasses, and plain objects
- •Clean DSL syntax with composable operators for AND, OR, NOT logic
- •Nine years of iteration distilled from author's thesis work into focused library
Weaknesses
- •Python already has multiple predicate and filter libraries in the ecosystem
- •Niche appeal—most Python devs use simple if-statements or list comprehensions
Category
Target Audience
Python backend developers
Similar To
SQLAlchemy filters · Django Q objects
Post Description
Did a thing, thought it might be useful, as I'm surely not the only one hitting this issue. Curious to see how others have solved it as well, so if you've ever done something like this, while keeping it developer friendly and easily extensible, let me know
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