code: def QA_fetch_get_stock_adj(code, end=''):
      
  
      pro = get_pro()
      adj = pro.adj_factor(ts_code=code, trade_date=end)
      return adj
docs: 获取股票的复权因子
      
      Arguments:
          code {[type]} -- [description]
      
      Keyword Arguments:
          end {str} -- [description] (default: {''})
      
      Returns:
          [type] -- [description]