code: def shutdown(self):
          '''
          Shutdown the whole server
          '''
          for item in self.clients:
              client, address = item
              client.close()
              self.clients.remove(itemf shutdown(self):
          '''
          Shutdown the whole server
          '''
          for item in self.clients:
              client, address = item
              client.close()
              self.clients.remove(item)
docs: Shutdown the whole server