code: def get_avg_reward_values(self) -> Tensor:
      return self.total_sum_reward_per_arm / self.total_n_obs_per_arm
  
imports: from abc import ABC, abstractmethod
  from typing import List, Optional, Tuple
  import torch
  from torch import Tensor
label_desc: Use image node_id 8 for calling the MABAlgo obj's underlying member method code with example usage: obj.get_avg_reward_values() and returns: unknown