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Cannot load the dataset split (in streaming mode) to extract the first rows.
Error code:   StreamingRowsError
Exception:    CastError
Message:      Couldn't cast
Argos-1.avs: struct<description: string, format: string, source: string, license: string, sha256: string, size: i (... 5 chars omitted)
  child 0, description: string
  child 1, format: string
  child 2, source: string
  child 3, license: string
  child 4, sha256: string
  child 5, size: int64
Argos-1-Stacked.avs: struct<description: string, format: string, source: string, license: string, sha256: string, size: i (... 5 chars omitted)
  child 0, description: string
  child 1, format: string
  child 2, source: string
  child 3, license: string
  child 4, sha256: string
  child 5, size: int64
to
{'Argos-1-Stacked.avs': {'description': Value('string'), 'format': Value('string'), 'source': Value('string'), 'license': Value('string'), 'sha256': Value('string'), 'size': Value('int64')}}
because column names don't match
Traceback:    Traceback (most recent call last):
                File "/src/services/worker/src/worker/utils.py", line 147, 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 127, 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 483, 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 2840, in __iter__
                  for key, example in ex_iterable:
                                      ^^^^^^^^^^^
                File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 2373, in __iter__
                  for key, pa_table in self._iter_arrow():
                                       ~~~~~~~~~~~~~~~~^^
                File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 2398, 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 536, in _iter_arrow
                  for key, pa_table in iterator:
                                       ^^^^^^^^
                File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 419, 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 343, 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 2378, in table_cast
                  return cast_table_to_schema(table, schema)
                File "/usr/local/lib/python3.14/site-packages/datasets/table.py", line 2306, in cast_table_to_schema
                  raise CastError(
                  ...<3 lines>...
                  )
              datasets.table.CastError: Couldn't cast
              Argos-1.avs: struct<description: string, format: string, source: string, license: string, sha256: string, size: i (... 5 chars omitted)
                child 0, description: string
                child 1, format: string
                child 2, source: string
                child 3, license: string
                child 4, sha256: string
                child 5, size: int64
              Argos-1-Stacked.avs: struct<description: string, format: string, source: string, license: string, sha256: string, size: i (... 5 chars omitted)
                child 0, description: string
                child 1, format: string
                child 2, source: string
                child 3, license: string
                child 4, sha256: string
                child 5, size: int64
              to
              {'Argos-1-Stacked.avs': {'description': Value('string'), 'format': Value('string'), 'source': Value('string'), 'license': Value('string'), 'sha256': Value('string'), 'size': Value('int64')}}
              because column names don't match

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WSI test data

WSI test slides for the opentile, wsidicomizer and wsidicom test suites, mirrored here for fast, reliable CI downloads. Each slide folder holds a self-contained metadata.json; the root index.json is the aggregate. Each slide's original source, license, credit and attribution are in its metadata.json.

File Source License Credit
svs/CMU-1/CMU-1.svs source CC0-1.0 -
ndpi/CMU-1/CMU-1.ndpi source CC0-1.0 -
huron/Huron-1/Huron-1.tif source CC0-1.0 Huron Digital Pathology
scn/scn1/Leica-1.scn source distributable Yves Sucaet
scn/scn2/Leica-2.scn source distributable Ira Hensen, CECAD Imaging Facility, Cologne
scn/scn3/Leica-3.scn source distributable Ira Hensen, CECAD Imaging Facility, Cologne
argos/Argos-1/Argos-1.avs source CC0-1.0 -
argos/Argos-1-Stacked/Argos-1-Stacked.avs source CC0-1.0 -
qptiff/HandEcompressed/HandEcompressed_Scan1.qptiff source CC-BY-4.0 PerkinElmer
qptiff/LuCa-7color/LuCa-7color_Scan1.qptiff source CC-BY-4.0 PerkinElmer
svs/JP2K-33003-1/JP2K-33003-1.svs source distributable -
svs/CMU-1-JP2K-33005/CMU-1-JP2K-33005.svs source CC0-1.0 -
mirax/CMU-1/ source CC0-1.0 -
isyntax/isyntax1/testslide.isyntax source MIT Bioimage Informatics Group (Ruusuvuori lab)
dicom/3DHISTECH-1/ source CC0-1.0 -
dicom/CMU-1-JP2K-33005/ source CC0-1.0 -
dicom/JP2K-33003-1/ source distributable -
dicom/Leica-4/ source CC0-1.0 -
dicom/Hamamatsu-2/ source CC0-1.0 -
dicom/Hamamatsu-Case-A/ source CC0-1.0 -

Licenses

  • CC0-1.0 - public-domain dedication (LICENSES/CC0-1.0.txt); no conditions.
  • CC-BY-4.0 - LICENSES/CC-BY-4.0.txt; requires attribution, carried in each qptiff slide's metadata.json attribution field (creator + license link).
  • MIT - LICENSES/MIT.txt; requires preserving the copyright notice.
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