CategoricalIndex.item()

CategoricalIndex.identical(other)

DatetimeIndex.has_duplicates

Panel.take(indices, axis=0, convert=True, is_copy=True, **kwargs)

DatetimeIndex.unique()

Index.factorize(sort=False, na_sentinel=-1)

DataFrameGroupBy.resample(rule, *args, **kwargs)

Index.T return the transpose, which is by definition self

TimedeltaIndex.format(name=False, formatter=None, **kwargs)

CategoricalIndex.codes