TimedeltaIndex.ceil(freq)

Index.item()

MultiIndex.strides return the strides of the underlying data

CategoricalIndex.flags

Series.dt.year The year of the datetime

MultiIndex.nlevels

Series.order(na_last=None, ascending=True, kind='quicksort', na_position='last', inplace=False)

Series.add_suffix(suffix)

DatetimeIndex.ravel(order='C')

Index.is_monotonic_decreasing return if the index is monotonic decreasing (only equal or decreasing)