narwhals

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

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

Convert Pandas code to Narwhals automatically

Apache DataFusion backend for Narwhals, registered through the narwhals.plugins entry point.

A lightweight toolkit for rule-based and unsupervised anomaly detection in time series