code: def __serial_price(self, rows=6):
          
          result = (float(i[rows]) for i in self.__raw_data)
          return list(result)
docs: 取出某一價格序列 *(舊→新)*
  
              預設序列收盤價 *(self.__serial_price(6))*
  
              :rtype: list
              :returns: 預設序列收盤價 *(self.__serial_price(6))*