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lerobot/tests/utils/test_collate.py
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2026-04-27 10:56:32 +02:00

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Python

#!/usr/bin/env python
import torch
from lerobot.utils.collate import lerobot_collate_fn
def test_lerobot_collate_preserves_messages_and_drops_raw_language():
batch = [
{
"index": torch.tensor(0),
"messages": [{"role": "assistant", "content": "a"}],
"message_streams": ["low_level"],
"target_message_indices": [0],
"language_persistent": [{"content": "raw"}],
"language_events": [],
},
{
"index": torch.tensor(1),
"messages": [{"role": "assistant", "content": "b"}],
"message_streams": ["low_level"],
"target_message_indices": [0],
"language_persistent": [{"content": "raw"}],
"language_events": [],
},
]
out = lerobot_collate_fn(batch)
assert out["index"].tolist() == [0, 1]
assert out["messages"][0][0]["content"] == "a"
assert out["messages"][1][0]["content"] == "b"
assert out["message_streams"] == [["low_level"], ["low_level"]]
assert out["target_message_indices"] == [[0], [0]]
assert "language_persistent" not in out
assert "language_events" not in out