From 4a466d94b6530ea2aa7b38997db03c00239e5d70 Mon Sep 17 00:00:00 2001
From: Michel Aractingi <michel.aractingi@huggingface.co>
Date: Sun, 6 Jul 2025 22:32:51 +0200
Subject: [PATCH] moved legacy functions to convert_stats.py

---
 .../v21/convert_dataset_v20_to_v21.py         | 24 +------------------
 src/lerobot/datasets/v21/convert_stats.py     | 24 ++++++++++++++++++-
 2 files changed, 24 insertions(+), 24 deletions(-)

diff --git a/src/lerobot/datasets/v21/convert_dataset_v20_to_v21.py b/src/lerobot/datasets/v21/convert_dataset_v20_to_v21.py
index 63920d5a2..cfcff6e45 100644
--- a/src/lerobot/datasets/v21/convert_dataset_v20_to_v21.py
+++ b/src/lerobot/datasets/v21/convert_dataset_v20_to_v21.py
@@ -33,38 +33,16 @@ python -m lerobot.datasets.v21.convert_dataset_v20_to_v21 \
 
 import argparse
 import logging
-from pathlib import Path
 
-import jsonlines
 from huggingface_hub import HfApi
 
 from lerobot.datasets.lerobot_dataset import CODEBASE_VERSION, LeRobotDataset
-from lerobot.datasets.utils import STATS_PATH, load_stats, serialize_dict, write_info
+from lerobot.datasets.utils import STATS_PATH, load_stats, write_info
 from lerobot.datasets.v21.convert_stats import check_aggregate_stats, convert_stats
 
 V20 = "v2.0"
 V21 = "v2.1"
 
-### LEGACY FUNCTIONS REMOVED FROM UTILS ###
-
-LEGACY_EPISODES_STATS_PATH = "episodes_stats.jsonl"
-
-
-def append_jsonlines(data: dict, fpath: Path) -> None:
-    fpath.parent.mkdir(exist_ok=True, parents=True)
-    with jsonlines.open(fpath, "a") as writer:
-        writer.write(data)
-
-
-def legacy_write_episode_stats(episode_index: int, episode_stats: dict, local_dir: Path):
-    # We wrap episode_stats in a dictionary since `episode_stats["episode_index"]`
-    # is a dictionary of stats and not an integer.
-    episode_stats = {"episode_index": episode_index, "stats": serialize_dict(episode_stats)}
-    append_jsonlines(episode_stats, local_dir / LEGACY_EPISODES_STATS_PATH)
-
-
-######## END OF LEGACY FUNCTIONS ########
-
 
 class SuppressWarnings:
     def __enter__(self):
diff --git a/src/lerobot/datasets/v21/convert_stats.py b/src/lerobot/datasets/v21/convert_stats.py
index a6b4f4afd..43124e8b0 100644
--- a/src/lerobot/datasets/v21/convert_stats.py
+++ b/src/lerobot/datasets/v21/convert_stats.py
@@ -13,13 +13,35 @@
 # limitations under the License.
 
 from concurrent.futures import ThreadPoolExecutor, as_completed
+from pathlib import Path
 
+import jsonlines
 import numpy as np
 from tqdm import tqdm
 
 from lerobot.datasets.compute_stats import aggregate_stats, get_feature_stats, sample_indices
 from lerobot.datasets.lerobot_dataset import LeRobotDataset
-from lerobot.datasets.utils import legacy_write_episode_stats
+from lerobot.datasets.utils import serialize_dict
+
+### LEGACY FUNCTIONS REMOVED FROM UTILS ###
+
+LEGACY_EPISODES_STATS_PATH = "episodes_stats.jsonl"
+
+
+def append_jsonlines(data: dict, fpath: Path) -> None:
+    fpath.parent.mkdir(exist_ok=True, parents=True)
+    with jsonlines.open(fpath, "a") as writer:
+        writer.write(data)
+
+
+def legacy_write_episode_stats(episode_index: int, episode_stats: dict, local_dir: Path):
+    # We wrap episode_stats in a dictionary since `episode_stats["episode_index"]`
+    # is a dictionary of stats and not an integer.
+    episode_stats = {"episode_index": episode_index, "stats": serialize_dict(episode_stats)}
+    append_jsonlines(episode_stats, local_dir / LEGACY_EPISODES_STATS_PATH)
+
+
+######## END OF LEGACY FUNCTIONS ########
 
 
 def sample_episode_video_frames(dataset: LeRobotDataset, episode_index: int, ft_key: str) -> np.ndarray: