not longer string only, change notebooks with function passes for demo

        else:

            edges_to_iter = self.edges()

        if not isinstance(func, str):

            func = func.__name__

        for s, d in edges_to_iter:

            curr_edge = self.get_edge_data(s, d)

            try:

                function = getattr(curr_edge, func)

            except:

                raise AttributeError('The passed function is not an attribute of Edge')

                raise AttributeError(func, ' is not an attribute of Edge')

            else:

                function(*args, **kwargs)