docs: def book_status(self, ctrlno):
          """
          查看图书借阅情况
          :param ctrlno: 图书馆系统图书唯一标识
          :return: {
              'isbn': '',
              'status_list': [],
          }
          """
          result = {
              'isbn': '',
              'status_list': [],
          }
          html = self.__book_status_html(ctrlno)
          soup = BeautifulSoup(html)
  
          tds = soup.select(selector='tbody')[0].select('td')
          cursor = 1
          while cursor < len(tds) / 7:
              s = (cursor - 1) * 7
              location = tds[s].get_text().strip('\r\n ')
              index_num = tds[s + 1].get_text().strip('\r\n ')
              login_num = tds[s + 2].get_text().strip('\r\n ')
              volume = tds[s + 3].get_text().strip('\r\n ')
              year = tds[s + 4].get_text().strip('\r\n ')
              status = tds[s + 5].get_text().strip('\r\n ')
              type = tds[s + 6].get_text().strip('\r\n ')
  
              info = {
                  'location': location,  # 馆藏地
                  'index_num': index_num,  # 索取号
                  'login_num': login_num,  # 登录号
                  'volume': volume,  # 卷期
                  'year': year,  # 年代
                  'status': status,  # 状态
                  'type': type,  # 借阅类型
              }
              result['status_list'].append(info)
              cursor += 1
          # isbn
          result['isbn'] = self.__get_isbn(html)
          return result