Index.value_counts(normalize=False, sort=True, ascending=False, bins=None, dropna=True)

Index.item()

Index.nunique(dropna=True)

Index.data return the data pointer of the underlying data

Index.flags

Index.sortlevel(level=None, ascending=True, sort_remaining=None)

Index.is_numeric()

Index.get_level_values(level)

Index.nlevels

Index.asof_locs(where, mask)