Python package implementing ML feature engineering and pre-processing for polars or pandas dataframes.

Lightweight DataFrame validation decorators for Pandas, Polars, Modin, and PyArrow. No custom types required.

Lightweight, engine-agnostic dataframe validation

A user-friendly library that brings familiar DataFrame-style operations to AnnData objects with a simple and expressive API.

Grep your dataframes

A seaborn-style Python library for generating Mermaid diagrams

Convert Pandas code to Narwhals automatically

Extended Elo rating system implementation based on the equivalence with logistic regression.

DataFrame expressions constructors using Narwhals.