def get_controller(self, cid):
    if cid not in self.cid2controller:
      raise ValueError(str(cid) % "unknown cid %s")
    return self.cid2controller[cid]
dataset/ETHPy150Open ucb-sts/sts/sts/controller_manager.py/ControllerManager.get_controller/swapped operands of `%`