.. _impute-standard-imputers:

Standard imputers
=================

The public stable namespace exports :class:`SimpleImputer` and
:class:`MissingIndicator` with scikit-learn-compatible estimator behavior.
They are the default choice when a simple per-feature strategy or missingness
indicator is sufficient.

Use standard imputers when approximate neighbor indexing would add operational
complexity without a measured benefit. Keep preprocessing fit strictly on the
training partition to avoid data leakage.