按股票排列的查看blockname的视图

        Returns:
            [type] -- [description]

def view_code(self):
        """按股票排列的查看blockname的视图

        Returns:
            [type] -- [description]
        """

        return self.data.groupby(level=1).apply(
            lambda x:
            [item for item in x.index.remove_unused_levels().levels[0]]
        )