Find the unique elements of an array.| numpy.org
Gallery examples: Release Highlights for scikit-learn 1.5 Release Highlights for scikit-learn 1.3 Release Highlights for scikit-learn 1.1 Release Highlights for scikit-learn 1.0 Release Highlights ...| scikit-learn
Two-dimensional, size-mutable, potentially heterogeneous tabular data.| pandas.pydata.org
Join a sequence of arrays along an existing axis.| numpy.org