code: def real(self, stock_codes, prefix=False):
          
          if not isinstance(stock_codes, list):
              stock_codes = [stock_codes]
  
          stock_list = self.gen_stock_list(stock_codes)
          return self.get_stock_data(stock_list, prefix=prefix)
docs: return specific stocks real quotation
          :param stock_codes: stock code or list of stock code,
                  when prefix is True, stock code must start with sh/sz
          :param prefix: if prefix i True, stock_codes must contain sh/sz market
              flag. If prefix is False, index quotation can't return
          :return quotation dict, key is stock_code, value is real quotation.
              If prefix with True, key start with sh/sz market flag