小编The*_*ail的帖子

我正在尝试在 Stable Baselines3 中使用自定义环境实现 SAC，但我不断收到标题中的错误。任何非策略算法都会发生该错误，而不仅仅是 SAC。

追溯：

File "<MY PROJECT PATH>\src\main.py", line 70, in <module>
  main()
File "<MY PROJECT PATH>\src\main.py", line 66, in main
  model.learn(total_timesteps=timesteps, reset_num_timesteps=False, tb_log_name=f"sac_{num_cars}_cars")
File "<MY PROJECT PATH>\venv\lib\site-packages\stable_baselines3\sac\sac.py", line 309, in learn
  return super().learn(
File "<MY PROJECT PATH>\venv\lib\site-packages\stable_baselines3\common\off_policy_algorithm.py", line 375, in learn
  self.train(batch_size=self.batch_size, gradient_steps=gradient_steps)
File "<MY PROJECT PATH>\venv\lib\site-packages\stable_baselines3\sac\sac.py", line 256, in train
  current_q_values = self.critic(replay_data.observations, replay_data.actions)
File "<MY PROJECT PATH>\venv\lib\site-packages\torch\nn\modules\module.py", line 1190, in _call_impl
  return forward_call(*input, **kwargs)
File "<MY PROJECT PATH>\venv\lib\site-packages\stable_baselines3\common\policies.py", line 885, in forward
  return tuple(q_net(qvalue_input) …

我正在尝试编写一个自定义比较器方法来比较自定义类 Customer 中的不同内容，并且在编译时得到incompatible types: T cannot be converted to Customer. DataChecker.compare() 是从泛型方法运行的，但我知道无论何时运行 T 都会是在重载的 DataChecker.compare() 方法中定义的类型。下面是我的代码：

public int compare(Customer cust1, Customer cust2, String sortBy){ //Comparator interface for customers
    if (sortBy == "ID"){
            if (cust1.getID() < cust2.getID()){
                    return -1;
            } else if (cust1.getID() == cust2.getID()){
                    return 0;
            } else {
                    return 1;
            }
    }

    throw new IllegalArgumentException("Not a valid compare for Customer: " + sortBy);
}

此处调用该方法（左侧和右侧是 T[ ]，但运行时 T 将是 DataChecker.compare() 中定义的类型之一 - 例如 Customer -）：

if (DataChecker.compare(left[i], …