def label_empty(self, **kwargs):
        "Label every item with an `EmptyLabel`."
        kwargs['label_cls'] = EmptyLabelList
        return self.label_from_func(func=lambda o: 0., **kwargs)
def label_empty ( self , ** kwargs ) : kwargs [ 'label_cls' ] = EmptyLabelList return self . label_from_func ( func = lambda o : 0. , ** kwargs )
Label every item with an `EmptyLabel`.