fix log

src/backend.py

@@ -460,7 +460,7 @@ def evaluate(
                     episode_infos = infos[0].get("episode")
                     if episode_infos is not None:
                         logger.info(f"Atari Episode Score: {episode_infos['r']:.2f}")
-                        logger.info("Atari Episode Length", episode_infos["l"])
+                        logger.info(f"Atari Episode Length {episode_infos["l"]}")
                         episode_rewards.append(episode_infos["r"])
                         episode_lengths.append(episode_infos["l"])
 
@@ -468,7 +468,7 @@ def evaluate(
                     # NOTE: for env using VecNormalize, the mean reward
                     # is a normalized reward when `--norm_reward` flag is passed
                     logger.info(f"Episode Reward: {episode_reward:.2f}")
-                    logger.info("Episode Length", ep_len)
+                    logger.info(f"Episode Length {ep_len}")
                     episode_rewards.append(episode_reward)
                     episode_lengths.append(ep_len)
                     episode_reward = 0.0
@@ -477,7 +477,7 @@ def evaluate(
                 # Reset also when the goal is achieved when using HER
                 if done and infos[0].get("is_success") is not None:
                     if verbose > 1:
-                        logger.info("Success?", infos[0].get("is_success", False))
+                        logger.info(f"Success? {infos[0].get("is_success", False)}")
 
                     if infos[0].get("is_success") is not None:
                         successes.append(infos[0].get("is_success", False))