1.pydantic / pydantic
Data validation using Python type hints
+78 stars
from 29,188 · score 4.37
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2.567-labs / instructor
structured outputs for llms
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3.unionai-oss / pandera
A light-weight, flexible, and expressive statistical data testing library
+10 stars
from 4,497 · score 2.40
4.antonagestam / phantom-types
Phantom types for Python.
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5.vertti / daffy
Lightweight DataFrame validation decorators for Pandas, Polars, Modin, and PyArrow. No custom types required.
+1 stars
from 59 · score 0.69