code: def set_name(self, new_name):
          
  
          # change the hostname in the startup-config
          if os.path.isfile(self.startup_config_path):
              try:
                  with open(self.startup_config_path, "r+", encoding="utf-8", errors="replace") as f:
                      old_config = f.read()
                      new_config = re.sub(r"^hostname .+$", "hostname " + new_name, old_config, flags=re.MULTILINE)
                      f.seek(0)
                      f.write(new_config)
              except OSError as e:
                  raise DynamipsError("Could not amend the configuration {}: {}".format(self.startup_config_path, e))
  
          # change the hostname in the private-config
          if os.path.isfile(self.private_config_path):
              try:
                  with open(self.private_config_path, "r+", encoding="utf-8", errors="replace") as f:
                      old_config = f.read()
                      new_config = old_config.replace(self.name, new_name)
                      f.seek(0)
                      f.write(new_config)
              except OSError as e:
                  raise DynamipsError("Could not amend the configuration {}: {}".format(self.private_config_path, e))
  
          yield from self._hypervisor.send('vm rename "{name}" "{new_name}"'.format(name=self._name, new_name=new_name))
          log.info('Router "{name}" [{id}]: renamed to "{new_name}"'.format(name=self._name, id=self._id, new_name=new_name))
          self._name = new_name
docs: Renames this router.
  
          :param new_name: new name string