add fixes for reproducibility

lerobot/common/envs/pusht/pusht_env.py

@@ -33,7 +33,7 @@ class PushTEnv(gym.Env):
 
     def __init__(
         self,
-        legacy=False,
+        legacy=True,  # compatibility with original
         block_cog=None,
         damping=None,
         render_action=True,

lerobot/common/envs/pusht/pusht_image_env.py

@@ -7,7 +7,8 @@ from lerobot.common.envs.pusht.pusht_env import PushTEnv
 class PushTImageEnv(PushTEnv):
     metadata = {"render.modes": ["rgb_array"], "video.frames_per_second": 10}
 
-    def __init__(self, legacy=False, block_cog=None, damping=None, render_size=96):
+    # Note: legacy defaults to True for compatibility with original
+    def __init__(self, legacy=True, block_cog=None, damping=None, render_size=96):
         super().__init__(
             legacy=legacy, block_cog=block_cog, damping=damping, render_size=render_size, render_action=False
         )

lerobot/scripts/eval.py

@@ -1,3 +1,4 @@
+import json
 import logging
 import threading
 import time
@@ -41,6 +42,7 @@ def eval_policy(
     sum_rewards = []
     max_rewards = []
     successes = []
+    seeds = []
     threads = []  # for video saving threads
     episode_counter = 0  # for saving the correct number of videos
 
@@ -53,11 +55,15 @@ def eval_policy(
             if save_video or (return_first_video and i == 0):  # noqa: B023
                 ep_frames.append(env.render())  # noqa: B023
 
+        # Clear the policy's action queue before the start of a new rollout.
+        if policy is not None:
+            policy.clear_action_queue()
+
+        env.start()  # needed to be able to get the seeds the first time as BatchedEnvs are lazy
+        seeds.extend(env._next_seed)
         with torch.inference_mode():
             # TODO(alexander-soare): When `break_when_any_done == False` this rolls out for max_steps even when all
             # envs are done the first time. But we only use the first rollout. This is a waste of compute.
-            if policy is not None:
-                policy.clear_action_queue()
             rollout = env.rollout(
                 max_steps=max_steps,
                 policy=policy,
@@ -65,8 +71,8 @@ def eval_policy(
                 callback=maybe_render_frame,
                 break_when_any_done=env.batch_size[0] == 1,
             )
-        # Figure out where in each rollout sequence the first done condition was encountered (results after this won't
+        # Figure out where in each rollout sequence the first done condition was encountered (results after
-        # be included).
+        # this won't be included).
         # Note: this assumes that the shape of the done key is (batch_size, max_steps, 1).
         # Note: this relies on a property of argmax: that it returns the first occurrence as a tiebreaker.
         rollout_steps = rollout["next", "done"].shape[1]
@@ -108,11 +114,31 @@ def eval_policy(
         thread.join()
 
     info = {
+        "micro": [
+            {
+                "episode_ix": i,
+                "sum_reward": sum_reward,
+                "max_reward": max_reward,
+                "success": success,
+                "seed": seed,
+            }
+            for i, (sum_reward, max_reward, success, seed) in enumerate(
+                zip(
+                    sum_rewards[:num_episodes],
+                    max_rewards[:num_episodes],
+                    successes[:num_episodes],
+                    seeds[:num_episodes],
+                    strict=True,
+                )
+            )
+        ],
+        "macro": {
             "avg_sum_reward": np.nanmean(sum_rewards[:num_episodes]),
             "avg_max_reward": np.nanmean(max_rewards[:num_episodes]),
             "pc_success": np.nanmean(successes[:num_episodes]) * 100,
             "eval_s": time.time() - start,
             "eval_ep_s": (time.time() - start) / num_episodes,
+        },
     }
     if return_first_video:
         return info, first_video
@@ -156,7 +182,7 @@ def eval(cfg: dict, out_dir=None):
         # when policy is None, rollout a random policy
         policy = None
 
-    metrics = eval_policy(
+    info = eval_policy(
         env,
         policy=policy,
         save_video=True,
@@ -165,7 +191,11 @@ def eval(cfg: dict, out_dir=None):
         max_steps=cfg.env.episode_length,
         num_episodes=cfg.eval_episodes,
     )
-    print(metrics)
+    print(info["macro"])
+
+    # Save info
+    with open(Path(out_dir) / "eval_info.json", "w") as f:
+        json.dump(info, f, indent=2)
 
     logging.info("End of eval")
 

lerobot/scripts/train.py

@@ -183,7 +183,7 @@ def train(cfg: dict, out_dir=None, job_name=None):
                 video_dir=Path(out_dir) / "eval",
                 save_video=True,
             )
-            log_eval_info(logger, eval_info, step, cfg, offline_buffer, is_offline)
+            log_eval_info(logger, eval_info["macro"], step, cfg, offline_buffer, is_offline)
             if cfg.wandb.enable:
                 logger.log_video(first_video, step, mode="eval")
             logging.info("Resume training")