gistfile1.txt

    def get_agent_id(self, agent_id):
        if not hasattr(self, '_agent_ids'):
          self._agent_ids = {}
        if agent_id in self.agent_ids:
          return self.agent_ids[agent_id]
        a_id_list = self.list_agent_id()
        for a in a_id_list:
            if a == agent_id:
                self.agent_ids[agent_id] = a
                return a