code: def get_electricity_info(self, apart_id, meter_room):
          
          apart_id = str(apart_id)
          meter_room = str(meter_room)
          try:
              content = LifeService._get_electricity_info_html(apart_id, meter_room)
          except KeyError as e:
              _.d(e.message)
              result = {
                  'response': None
              }
              return _.to_json_string(result)
          soup = BeautifulSoup(content)
          tags = soup.find_all(name='span', class_='STYLE7')
          result = {
              'response': {
                  'apart': _.trim(tags[0].string),
                  'apart_id': _.trim(tags[1].string),
                  'used': _.trim(tags[2].string),
                  'left': _.trim(tags[3].string),
                  'update_time': _.trim(tags[4].string)
              }
          }
          return _.to_json_string(result)
docs: get electricity info
  
              :param apart_id: 栋数
              :param meter_room: 宿舍号