Index.item()

Index.nunique(dropna=True)

Index.fillna(value=None, downcast=None)

Index.order(return_indexer=False, ascending=True)

Index.inferred_type = None

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

Index.is_monotonic_increasing return if the index is monotonic increasing (only equal or increasing)

Index.memory_usage(deep=False)

Index.searchsorted(key, side='left', sorter=None)

Index.repeat(n, *args, **kwargs)