docs: def ckinv(self,oo):
      """ check the value is date or not
          檢查是否為日期格式
      """
      pattern = re.compile(r"[0-9]{2}/[0-9]{2}/[0-9]{2}")
      b = re.search(pattern, oo[0])
      try:
        b.group()
        return True
      except:
        return False