Datasets:

MC7ever
/

web-scraper-dataset

Error code:   StreamingRowsError
Exception:    CastError
Message:      Couldn't cast
id: string
source_domain: string
image_src: string
image_alt: string
crawl_date: string
-- schema metadata --
pandas: '{"index_columns": [], "column_indexes": [], "columns": [{"name":' + 679
to
{'id': Value('string'), 'source_domain': Value('string'), 'audio_src': Value('string'), 'audio_type': Value('string'), 'crawl_date': Value('string')}
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/parquet/parquet.py", line 220, in _generate_tables
                  yield Key(file_idx, batch_idx), self._cast_table(pa_table)
                                                  ~~~~~~~~~~~~~~~~^^^^^^^^^^
                File "/usr/local/lib/python3.14/site-packages/datasets/packaged_modules/parquet/parquet.py", line 156, 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
              id: string
              source_domain: string
              image_src: string
              image_alt: string
              crawl_date: string
              -- schema metadata --
              pandas: '{"index_columns": [], "column_indexes": [], "columns": [{"name":' + 679
              to
              {'id': Value('string'), 'source_domain': Value('string'), 'audio_src': Value('string'), 'audio_type': Value('string'), 'crawl_date': Value('string')}
              because column names don't match

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Web Scraper Dataset

Whole-site crawl of 650+ domains across ~70 categories (news, wikis, fanfiction, education, NSFW, social, gaming, code forges, papers, shadow libraries and more). Common Crawl first (with retry/backoff), live crawlers (wget2/Playwright/Selenium/ requests) as fallback, uncapped per-domain page counts.

Files

MASTER_text.parquet — crawled page text (id, modality, language, source_domain, category, title, url, text, text_length, crawl_date)
MASTER_images.parquet — downloaded image bytes + metadata (id, source_domain, image_src, image_alt, image_bytes, content_type, crawl_date)
MASTER_tables.parquet — extracted HTML tables
MASTER_videos.parquet / MASTER_audio.parquet — media URL references (video/audio bytes are not pulled on CPU runners)
dataset.jsonl — flat {"text", "source", "category", "format", "length"} export of all markdown pages

Source code

Crawler notebook: https://www.kaggle.com/code/MC7ever/web-scraper-v5-ultimate-multimodal Seed list lives in the notebook (W dict, cell 4).

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