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The dataset generation failed
Error code: DatasetGenerationError
Exception: TypeError
Message: int() argument must be a string, a bytes-like object or a real number, not 'NoneType'
Traceback: Traceback (most recent call last):
File "/usr/local/lib/python3.14/site-packages/datasets/builder.py", line 1539, in _prepare_split_single
for key, record in generator:
^^^^^^^^^
File "/src/services/worker/src/worker/job_runners/config/parquet_and_info.py", line 621, in wrapped
for item in generator(*args, **kwargs):
~~~~~~~~~^^^^^^^^^^^^^^^^^
File "/usr/local/lib/python3.14/site-packages/datasets/packaged_modules/webdataset/webdataset.py", line 131, in _generate_examples
for example_idx, example in enumerate(self._get_pipeline_from_tar(tar_path, tar_iterator)):
~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/local/lib/python3.14/site-packages/datasets/packaged_modules/webdataset/webdataset.py", line 32, in _get_pipeline_from_tar
for filename, f in tar_iterator:
^^^^^^^^^^^^
File "/usr/local/lib/python3.14/site-packages/datasets/utils/track.py", line 49, in __iter__
for x in self.generator(*self.args):
~~~~~~~~~~~~~~^^^^^^^^^^^^
File "/usr/local/lib/python3.14/site-packages/datasets/utils/file_utils.py", line 1419, in _iter_from_urlpath
with xopen(urlpath, "rb", download_config=download_config, block_size=0) as f:
~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/local/lib/python3.14/site-packages/datasets/utils/file_utils.py", line 976, in xopen
file_obj = fs.open(paths[0], mode)
File "<string>", line 3, in open
File "/usr/local/lib/python3.14/unittest/mock.py", line 1176, in __call__
return self._mock_call(*args, **kwargs)
~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^
File "/usr/local/lib/python3.14/unittest/mock.py", line 1180, in _mock_call
return self._execute_mock_call(*args, **kwargs)
~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^
File "/usr/local/lib/python3.14/unittest/mock.py", line 1247, in _execute_mock_call
result = effect(*args, **kwargs)
File "/src/services/worker/src/worker/job_runners/config/parquet_and_info.py", line 794, in wrapped
tracker.files[urlpath] = {"read": 0, "size": int(f.size)}
~~~^^^^^^^^
TypeError: int() argument must be a string, a bytes-like object or a real number, not 'NoneType'
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "/src/services/worker/src/worker/job_runners/config/parquet_and_info.py", line 1379, in compute_config_parquet_and_info_response
parquet_operations, partial, estimated_dataset_info = stream_convert_to_parquet(
~~~~~~~~~~~~~~~~~~~~~~~~~^
builder, max_dataset_size_bytes=max_dataset_size_bytes
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
)
^
File "/src/services/worker/src/worker/job_runners/config/parquet_and_info.py", line 956, in stream_convert_to_parquet
builder._prepare_split(split_generator=splits_generators[split], file_format="parquet")
~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/local/lib/python3.14/site-packages/datasets/builder.py", line 1401, in _prepare_split
for job_id, done, content in self._prepare_split_single(
~~~~~~~~~~~~~~~~~~~~~~~~~~^
gen_kwargs=gen_kwargs, job_id=job_id, **_prepare_split_args
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
):
^
File "/usr/local/lib/python3.14/site-packages/datasets/builder.py", line 1579, in _prepare_split_single
raise DatasetGenerationError("An error occurred while generating the dataset") from e
datasets.exceptions.DatasetGenerationError: An error occurred while generating the datasetNeed help to make the dataset viewer work? Make sure to review how to configure the dataset viewer, and open a discussion for direct support.
parquet unknown | __key__ string | __url__ string |
|---|---|---|
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"UEFSMRUEFcDDBBWmlQRMFfCQARUAEgAAKLUv/WDgj00qBA4OyVAhNBCILR1YMRIFILDMOMESJSd5fWg4fmrMMUt2tTZwORKG2LV(...TRUNCATED) | data/file-001 | "hf://datasets/albagon/telearms-front-to-back-datav7@d77ddd1a4e7b53e584d361aaba965dc962162006/datase(...TRUNCATED) |
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End of preview.
TeleArms data v7, Front To Back Cube Line: trajectories and metadata, no images
19,108 simulated bimanual YAM teleoperation demos of Front To Back Cube Line, 16,302,415 frames at 30 Hz, in 20 parquet files, cleaned with the TeleArms data v7 recipe. Rendered with rig/DR v8 it is albagon/telearms-front-to-back-datav7-rigdrv8.
Data v7, in order:
- TeleArms v6's rules: measured J3 at most 180 degrees; demos with 2 or more arm-joint command reversals within 1 s (both steps at least 5 degrees) removed; actions capped within 0.2 rad of measured and 0.05 rad inside the joint limits.
action_originalkeeps the recorded commands. - Demos where a held cube fell out of a closed gripper from 1 cm or more above the table removed (965 of 20,073): a simulator contact artefact.
- Pauses cut with the careful rule (8.5% of the kept demos' frames): the pause before the first movement entirely; later stretches where nothing moves and nobody presses anything, only away from gripper presses (0.5 s before and after a close, 0.3 s before and 0.2 s after an open), shortened to keep about 0.17 s at each end, and never where the cut would jump a joint further than the demo's normal 99th-percentile step.
original_frame_indexmaps each row back to the uncut demo. - Two kinds of stretch kept but marked in
loss_mask(0 on that gripper's action; training code that ignores the column trains on everything): failed grabs, where a gripper commanded closed reaches fully closed without holding the cube (3,078 demos), masked from the close command to the reopen; and held cubes that slipped out of the closed gripper after being set down on the table instead of the gripper opening (1,419 demos), masked from the end of the hold to the reopen.
The mask column is loss_mask. The first upload (8 Nov 2026) called it action_loss_mask, which LeRobot reads as a second action output, so use this revision or later.
meta/episodes.parquet has one row per demo; meta/demo_meta.jsonl each demo's export record (with its data v7 cuts and masks); meta/demo_sidecars.jsonl each demo's game record (null where there is none); filter/ the rules, kept and removed demos and the per-demo cleaning table. State and action order: left joints 1-6, left gripper, right joints 1-6, right gripper; gripper 1 = open, 0 = closed. Not a loadable LeRobot dataset.
hf download albagon/telearms-front-to-back-datav7 --repo-type dataset --local-dir shards
mkdir data && ls shards/dataset-*.tar | xargs -P 8 -I{} tar -xf {} -C data
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