docs: def Rt_display(stock_no):
    """ For real time stock display
        即時盤用，顯示目前查詢各股的股價資訊。
    """
    a = twsk(stock_no).real
    if a:
      re = "{%(time)s} %(stock_no)s %(c)s %(range)+.2f(%(pp)+.2f%%) %(value)s" % {
          'stock_no': stock_no,
          'time': a['time'],
          'c': a['c'],
          'range': covstr(a['range']),
          'value': a['value'],
          'pp': covstr(a['pp'])
        }
      return re
    else:
      return a