code: def update_default_iou_values(self):
          
  
          try:
              output = yield from gns3server.utils.asyncio.subprocess_check_output(self._path, "-h", cwd=self.working_dir, stderr=True)
              match = re.search("-n <n>\s+Size of nvram in Kb \(default ([0-9]+)KB\)", output)
              if match:
                  self.nvram = int(match.group(1))
              match = re.search("-m <n>\s+Megabytes of router memory \(default ([0-9]+)MB\)", output)
              if match:
                  self.ram = int(match.group(1))
          except (ValueError, OSError, subprocess.SubprocessError) as e:
              log.warning("could not find default RAM and NVRAM values for {}: {}".format(os.path.basename(self._path), e))
docs: Finds the default RAM and NVRAM values for the IOU image.