code: def get_code(self, code):
          
          # code= [code] if isinstance(code,str) else
          return self.new(self.data.loc[(slice(None), code), :])
docs: getcode 获取某一只股票的板块
  
          Arguments:
              code {str} -- 股票代码
  
          Returns:
              DataStruct -- [description]