code: def get_statistics_24h(self, endtime):
          
  
          js = json.dumps(
              {'attrs': ["bytes", "num_sta", "time"], 'start': int(endtime - 86400) * 1000, 'end': int(endtime - 3600) * 1000})
          params = urllib.urlencode({'json': js})
          return self._read(self.api_url + 'stat/report/hourly.system', params)
docs: Return statistical data last 24h from time