MultiIndex.is_lexsorted()

TimedeltaIndex.flags

TimedeltaIndex.base return the base object if the memory of the underlying data is shared

Series.var(axis=None, skipna=None, level=None, ddof=1, numeric_only=None, **kwargs)

CategoricalIndex.ordered

DatetimeIndex.repeat(repeats, *args, **kwargs)

Series.axes Return a list of the row axis labels

DataFrame.isnull()

DataFrame.count(axis=0, level=None, numeric_only=False)

Series.align(other, join='outer', axis=None, level=None, copy=True, fill_value=None, method=None, limit=None, fill_axis=0, broadcast_axis=None)