MultiIndex.strides return the strides of the underlying data

CategoricalIndex.flags

Series.dt.year The year of the datetime

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

DatetimeIndex.ravel(order='C')

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

DatetimeIndex.is_quarter_start Logical indicating if first day of quarter (defined by frequency)

MultiIndex.memory_usage(deep=False)

CategoricalIndex.memory_usage(deep=False)

TimedeltaIndex.holds_integer()