Panel.toLong(*args, **kwargs)

Series.to_period(freq=None, copy=True)

TimedeltaIndex.set_value(arr, key, value)

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

CategoricalIndex.nlevels

Panel.pipe(func, *args, **kwargs)

Index.ndim return the number of dimensions of the underlying data, by definition 1

CategoricalIndex.symmetric_difference(other, result_name=None)

DatetimeIndex.nlevels

Panel4D.truediv(other, axis=0)