DataFrame.sub(other, axis='columns', level=None, fill_value=None)

DataFrame.stack(level=-1, dropna=True)

DataFrame.size number of elements in the NDFrame

MultiIndex.slice_locs(start=None, end=None, step=None, kind=None)

Rolling.mean(*args, **kwargs)

Index.is_integer()

TimedeltaIndex.get_indexer_for(target, **kwargs)

Panel.clip(lower=None, upper=None, axis=None, *args, **kwargs)

DataFrame.take(indices, axis=0, convert=True, is_copy=True, **kwargs)

DataFrame.select_dtypes(include=None, exclude=None)