code: def get_block(self, block_name):
          
          # 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)), :])
docs: getblock 获取板块, block_name是list或者是单个str
  
          Arguments:
              block_name {[type]} -- [description]
  
          Returns:
              [type] -- [description]