lerobot/tests/data/xarm_lift_medium/replay_buffer/next/meta.json

{"reward": {"device": "cpu", "shape": [50], "dtype": "torch.float32"}, "done": {"device": "cpu", "shape": [50], "dtype": "torch.bool"}, "shape": [50], "device": "cpu", "_type": "<class 'tensordict._td.TensorDict'>"}