GetDummies#

GetDummies wraps dummy/indicator expansion in an estimator-style object. Important choices include selected columns, category separator, prefix/column naming, dropped level, sparse output, dtype and unknown-category policy.

Naming is part of downstream schema. If encoded feature names are persisted or consumed by a model/service, treat separator/prefix/drop policy as versioned configuration rather than presentation.

The maintenance review records a parameter-validation mismatch in this path. Validate non-default parameter combinations in your own pipeline until that finding is closed.