def get_block(self, block_name):
        """getblock 获取板块, block_name是list或者是单个str

        Arguments:
            block_name {[type]} -- [description]

        Returns:
            [type] -- [description]
        """
        # block_name = [block_name] if isinstance(
        #     block_name, str) else block_name
        # return QA_DataStruct_Stock_block(self.data[self.data.blockname.apply(lambda x: x in block_name)])

        return self.new(self.data.loc[(block_name, slice(None)), :])