Fix rendering of multi-process test environment

lib/RLTrader.py

@@ -230,22 +230,24 @@ def test(self, model_epoch: int = 0, should_render: bool = True):
 
         del train_provider
 
-        test_env = DummyVecEnv([make_env(test_provider, i) for i in range(1)])
+        init_envs = DummyVecEnv([make_env(test_provider) for _ in range(self.n_envs)])
 
         model_path = path.join('data', 'agents', f'{self.study_name}__{model_epoch}.pkl')
-        model = self.Model.load(model_path, env=test_env)
+        model = self.Model.load(model_path, env=init_envs)
+
+        test_env = DummyVecEnv([make_env(test_provider) for _ in range(1)])
 
         self.logger.info(f'Testing model ({self.study_name}__{model_epoch})')
 
-        zero_completed_obs = np.zeros((self.n_envs,) + test_env.observation_space.shape)
+        zero_completed_obs = np.zeros((self.n_envs,) + init_envs.observation_space.shape)
         zero_completed_obs[0, :] = test_env.reset()
 
         state = None
         rewards = []
 
         for _ in range(len(test_provider.data_frame)):
             action, state = model.predict(zero_completed_obs, state=state)
-            obs, reward, _, __ = test_env.step([action])
+            obs, reward, _, __ = test_env.step([action[0]])
 
             zero_completed_obs[0, :] = obs