def _server(self, args):
if len(args) != 1:
print('Usage: server start|stop|check')
return
cmd = args[0]
if cmd == 'start':
server = Server.BOSServer(self._bos)
self._server = threading.Thread(target=server.loop, args=())
self._server.start()
elif cmd == 'stop':
self._server = None
elif cmd == 'check':
if self._server is not None:
print('running')
else:
print('not started')
else:
print(f'bad subcommand {cmd}')
