code: def read_stats(self):
          
  
          self.tx_statistics = TgnObjectsDict()
          for port in self.session.ports.values():
              for stream in port.streams.values():
                  self.tx_statistics[stream] = stream.read_stats()
  
          tpld_statistics = XenaTpldsStats(self.session).read_stats()
  
          self.statistics = TgnObjectsDict()
          for stream, stream_stats in self.tx_statistics.items():
              self.statistics[stream] = OrderedDict()
              self.statistics[stream]['tx'] = stream_stats
              self.statistics[stream]['rx'] = OrderedDict()
              stream_tpld = stream.get_attribute('ps_tpldid')
              for tpld, tpld_stats in tpld_statistics.items():
                  if tpld.id == stream_tpld:
                      self.statistics[stream]['rx'][tpld] = tpld_stats
          return self.statistics
docs: Read current statistics from chassis.
  
          :return: dictionary {stream: {tx: {stat name: stat value}} rx: {tpld: {stat group {stat name: value}}}}