Formulaic (Python for Wilkinson Formulas)

Formulaic is a high-performance Python library that implements Wilkinson formulas for statistical modeling. It simplifies feature engineering by providing extensible formula parsing and high-performance dataframe to model-matrix conversions. It supports various data input/output formats including pandas DataFrames, NumPy arrays, SciPy sparse matrices, and Narwhals dataframes. The library is actively maintained and currently at version 1.2.1.