code: async def startlisten(self, vhost = None):
          '''
          Start listen on current servers
          
          :param vhost: return only servers of vhost if specified. '' to return only default servers.
                        None for all servers.
          '''
          servers = self.getservers(vhost)
          for s in servers:
              await s.startlisten()
          return len(serversync def startlisten(self, vhost = None):
          '''
          Start listen on current servers
          
          :param vhost: return only servers of vhost if specified. '' to return only default servers.
                        None for all servers.
          '''
          servers = self.getservers(vhost)
          for s in servers:
              await s.startlisten()
          return len(servers)
docs: Start listen on current servers
          
          :param vhost: return only servers of vhost if specified. '' to return only default servers.
                        None for all servers.