'numpy.ndarray' object has no attribute 'ratio_clip'

[Wisgon]

When I train AgentDDPG, this error happen.
In elegant_finrl/agent.py line 278 function select_action:

def select_action(self, state) -> np.ndarray:
        states = torch.as_tensor((state,), dtype=torch.float32, device=self.device).detach_()
        action = self.act(states)[0].cpu().numpy()
        return (action + self.ou_noise()).ratio_clip(-1, 1)

action + self.ou_noise() is a np.ndarray, it has no attribute named "ratio_clip".