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Error code: StreamingRowsError
Exception: TypeError
Message: Couldn't cast array of type
struct<url: string, title: string, revision_id: int64, license: string>
to
{'url': Value('string'), 'title': Value('string'), 'license': Value('string')}
Traceback: Traceback (most recent call last):
File "/src/services/worker/src/worker/utils.py", line 149, in get_rows_or_raise
return get_rows(
dataset=dataset,
...<4 lines>...
column_names=column_names,
)
File "/src/libs/libcommon/src/libcommon/utils.py", line 272, in decorator
return func(*args, **kwargs)
File "/src/services/worker/src/worker/utils.py", line 129, in get_rows
rows_plus_one = list(itertools.islice(safe_iter(ds, dataset=dataset), rows_max_number + 1))
File "/src/services/worker/src/worker/utils.py", line 544, in safe_iter
yield from ds.decode(False) if ds.features else ds
File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 3052, in __iter__
for key, example in ex_iterable:
^^^^^^^^^^^
File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 2559, in __iter__
for key, pa_table in self._iter_arrow():
~~~~~~~~~~~~~~~~^^
File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 2584, in _iter_arrow
for key, pa_table in self.ex_iterable._iter_arrow():
~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 558, in _iter_arrow
for key, pa_table in iterator:
^^^^^^^^
File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 440, in _iter_arrow
for key, pa_table in self.generate_tables_fn(**gen_kwags):
~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^
File "/usr/local/lib/python3.14/site-packages/datasets/packaged_modules/json/json.py", line 361, in _generate_tables
self._cast_table(pa_table, json_field_paths=json_field_paths),
~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/local/lib/python3.14/site-packages/datasets/packaged_modules/json/json.py", line 132, in _cast_table
pa_table = table_cast(pa_table, self.info.features.arrow_schema)
File "/usr/local/lib/python3.14/site-packages/datasets/table.py", line 2381, in table_cast
return cast_table_to_schema(table, schema)
File "/usr/local/lib/python3.14/site-packages/datasets/table.py", line 2315, in cast_table_to_schema
cast_array_to_feature(
~~~~~~~~~~~~~~~~~~~~~^
table[name] if name in table_column_names else pa.array([None] * len(table), type=schema.field(name).type),
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
feature,
^^^^^^^^
)
^
File "/usr/local/lib/python3.14/site-packages/datasets/table.py", line 1861, in wrapper
return pa.chunked_array([func(chunk, *args, **kwargs) for chunk in array.chunks])
~~~~^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/local/lib/python3.14/site-packages/datasets/table.py", line 2161, in cast_array_to_feature
raise TypeError(f"Couldn't cast array of type\n{_short_str(array.type)}\nto\n{_short_str(feature)}")
TypeError: Couldn't cast array of type
struct<url: string, title: string, revision_id: int64, license: string>
to
{'url': Value('string'), 'title': Value('string'), 'license': Value('string')}Need help to make the dataset viewer work? Make sure to review how to configure the dataset viewer, and open a discussion for direct support.
lnxhelp knowledge cards
Verified, step-by-step help cards for beginners on Linux and macOS: one card per task, error message or concept. Each card gives an English canonical text, aliases in several languages (mostly Russian and English), literal error patterns, and the commands with expected output. The cards are the knowledge base of the lnxhelp offline helper.
Licensing is per card and mixed. Read the source.license field of each card before reuse. There is no single
license for this dataset (see the table below).
Contents
| File | Rows / files | What it is |
|---|---|---|
cards/ |
1,625 JSON files | Curated snapshot s2, one card per file, folders linux/, macos/, posix/, authored/ |
cards.jsonl |
1,625 lines | The same curated snapshot, one card per line |
cards_live.jsonl |
2,572 lines | The live card set of the repository. Same card JSON, with an added path field (relative path of the source file) |
card.schema.json |
1 file | JSON Schema of a card, schema_version 2 (additionalProperties: false) |
cards_live.jsonl is not a superset of s2: it has 947 more cards. Of these, 180 are Fedora cards, which s2
does not contain, and the rest are cards that s2 does not carry (linux 535, posix 140, macos 87, authored 5).
The curation step that produced s2 is not documented in this card. Use cards.jsonl for the curated set.
Schema (v2, summary)
Required: schema_version (2), id (slug), platform (linux | macos | posix), kind (task | error |
concept), title, summary (no commands), aliases (3 to 30 items, {text, lang}), applies_to.distros
(family, optional min/max version), steps, risk (low | medium | high), source (url, title,
license, optional revision_id).
Optional top-level fields: error_patterns, prerequisites, verify, rollback, warnings, see_also,
updated, output_guide, cause. applies_to can also list desktop, display_server and requires.
additionalProperties is false at the top level. See card.schema.json for the full definition.
Counts by source and license
Snapshot s2 (cards.jsonl, 1,625 cards), license from source.license:
| Folder / platform | Cards | License |
|---|---|---|
| linux (Arch Wiki based) | 384 | GFDL-1.3-or-later |
| linux (tldr-pages based) | 437 | CC-BY-4.0 |
| posix (tldr-pages based) | 332 | CC-BY-4.0 |
| macos (tldr-pages based) | 297 | CC-BY-4.0 |
| authored | 174 | CC-BY-4.0 |
| authored (macOS, Apple reference) | 1 | LicenseRef-Apple-Support-Copyright |
Live set (cards_live.jsonl, 2,572 cards):
| Source | Cards | License |
|---|---|---|
| Arch Wiki | 858 | GFDL-1.3-or-later |
| tldr-pages, linux | 498 | CC-BY-4.0 |
| tldr-pages, posix | 472 | CC-BY-4.0 |
| tldr-pages, macos | 384 | CC-BY-4.0 |
| Fedora Quick Docs | 180 | CC-BY-SA-3.0 |
| authored (12 different licenses) | 180 | CC-BY-4.0 (151), GPL-2.0-or-later (8), GFDL-1.3-or-later (5), GPL-3.0-or-later (5), LicenseRef-Apple-Support-Copyright (3), CC-BY-SA-4.0 (2), GPL-2.0-only, BSD-2-Clause, BSD-3-Clause, HPND, Apache-2.0, NOASSERTION (1 each) |
Licensing notes
- GFDL-1.3-or-later (Arch Wiki): copyleft. Copies and derived works carry the GFDL terms, which the owner should review before any redistribution.
- CC-BY-SA-3.0 (Fedora Quick Docs): share-alike. Derived cards carry the CC-BY-SA terms.
- CC-BY-4.0 (tldr-pages): attribution required. Credit: tldr-pages contributors, https://github.com/tldr-pages/tldr.
- Authored cards: the
source.licensevalue is the license of the reference page each card was checked against (a man page or documentation), not necessarily the license of the card text. The GPL, BSD and Apache values here are such references. The Apple-copyright reference (1 card ins2, 3 in the live set) is a copyright notice on Apple's material and needs a decision before any redistribution. - No single license has been chosen for this dataset. Treat it as all-rights-reserved until the owner decides.
Provenance
Converted from public sources with a teacher model, then checked by the card contract (schema, grounding in the source text, command checks in Docker sandboxes per distro and on macOS, and deterministic curation). The source text itself is not included here. Forum content is not part of this dataset.
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