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The dataset generation failed
Error code: DatasetGenerationError
Exception: CastError
Message: Couldn't cast
text: string
metadata: struct<format: string, subject: string, agentic_expansion: string, quality_checked: bool, schema_ver (... 69 chars omitted)
child 0, format: string
child 1, subject: string
child 2, agentic_expansion: string
child 3, quality_checked: bool
child 4, schema_version: string
child 5, case_id: string
child 6, difficulty: string
child 7, deepening: string
messages: list<item: struct<role: string, content: string>>
child 0, item: struct<role: string, content: string>
child 0, role: string
child 1, content: string
to
{'text': Value('string'), 'metadata': {'format': Value('string'), 'subject': Value('string'), 'agentic_expansion': Value('string'), 'quality_checked': Value('bool'), 'schema_version': Value('string')}}
because column names don't match
Traceback: Traceback (most recent call last):
File "/usr/local/lib/python3.14/site-packages/datasets/builder.py", line 1827, in _prepare_split_single
for key, table in generator:
^^^^^^^^^
File "/src/services/worker/src/worker/job_runners/config/parquet_and_info.py", line 613, in wrapped
for item in generator(*args, **kwargs):
~~~~~~~~~^^^^^^^^^^^^^^^^^
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
text: string
metadata: struct<format: string, subject: string, agentic_expansion: string, quality_checked: bool, schema_ver (... 69 chars omitted)
child 0, format: string
child 1, subject: string
child 2, agentic_expansion: string
child 3, quality_checked: bool
child 4, schema_version: string
child 5, case_id: string
child 6, difficulty: string
child 7, deepening: string
messages: list<item: struct<role: string, content: string>>
child 0, item: struct<role: string, content: string>
child 0, role: string
child 1, content: string
to
{'text': Value('string'), 'metadata': {'format': Value('string'), 'subject': Value('string'), 'agentic_expansion': Value('string'), 'quality_checked': Value('bool'), 'schema_version': Value('string')}}
because column names don't match
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 1369, 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 948, 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 1694, 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 1880, 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.
text string | metadata dict |
|---|---|
Subject: HTML coding
Module: What HTML is
Task: Explain HTML and its scope.
Plan: Define HTML, identify its purpose, and distinguish it from CSS and JavaScript. Identify the user-facing outcome, the required information architecture, the semantic element for each content block, accessibility obligations, and concrete a... | {
"format": "TEXT",
"subject": "HTML coding and web development",
"agentic_expansion": "eight-stage task execution and acceptance review",
"quality_checked": true,
"schema_version": "html-agentic-mixed-v1"
} |
Subject: HTML coding
Module: How browsers process HTML
Task: Explain the path from an HTML file to a visible webpage.
Plan: Describe loading, parsing, DOM construction, resource discovery, styling, layout, and painting. Identify the user-facing outcome, the required information architecture, the semantic element for ea... | {
"format": "TEXT",
"subject": "HTML coding and web development",
"agentic_expansion": "eight-stage task execution and acceptance review",
"quality_checked": true,
"schema_version": "html-agentic-mixed-v1"
} |
Subject: HTML coding
Module: Document roots
Task: Build a clean modern HTML document skeleton.
Plan: Include document type, language, head metadata, page title, and body. Identify the user-facing outcome, the required information architecture, the semantic element for each content block, accessibility obligations, and ... | {
"format": "TEXT",
"subject": "HTML coding and web development",
"agentic_expansion": "eight-stage task execution and acceptance review",
"quality_checked": true,
"schema_version": "html-agentic-mixed-v1"
} |
Subject: HTML coding
Module: Elements, tags, and attributes
Task: Explain basic HTML syntax precisely.
Plan: Define elements, opening and closing tags, void elements, attributes, and attribute values. Identify the user-facing outcome, the required information architecture, the semantic element for each content block, a... | {
"format": "TEXT",
"subject": "HTML coding and web development",
"agentic_expansion": "eight-stage task execution and acceptance review",
"quality_checked": true,
"schema_version": "html-agentic-mixed-v1"
} |
Subject: HTML coding
Module: Nesting and hierarchy
Task: Write correctly nested HTML and diagnose malformed nesting.
Plan: Show the parent-child relationship and repair a crossed closing-tag error. Identify the user-facing outcome, the required information architecture, the semantic element for each content block, acce... | {
"format": "TEXT",
"subject": "HTML coding and web development",
"agentic_expansion": "eight-stage task execution and acceptance review",
"quality_checked": true,
"schema_version": "html-agentic-mixed-v1"
} |
Subject: HTML coding
Module: Methodical coding workflow
Task: Use a repeatable process to author a page without creating avoidable bugs.
Plan: Move from purpose to outline, semantic structure, small implementations, and incremental testing. Identify the user-facing outcome, the required information architecture, the se... | {
"format": "TEXT",
"subject": "HTML coding and web development",
"agentic_expansion": "eight-stage task execution and acceptance review",
"quality_checked": true,
"schema_version": "html-agentic-mixed-v1"
} |
Subject: HTML coding
Module: Semantic structure
Task: Choose elements based on meaning rather than appearance.
Plan: Map common content roles to semantic elements and explain when div is appropriate. Identify the user-facing outcome, the required information architecture, the semantic element for each content block, ac... | {
"format": "TEXT",
"subject": "HTML coding and web development",
"agentic_expansion": "eight-stage task execution and acceptance review",
"quality_checked": true,
"schema_version": "html-agentic-mixed-v1"
} |
Subject: HTML coding
Module: Headings and document outline
Task: Create a logical heading hierarchy.
Plan: Use one primary h1 for the page subject and use h2 through h6 by content hierarchy. Identify the user-facing outcome, the required information architecture, the semantic element for each content block, accessibili... | {
"format": "TEXT",
"subject": "HTML coding and web development",
"agentic_expansion": "eight-stage task execution and acceptance review",
"quality_checked": true,
"schema_version": "html-agentic-mixed-v1"
} |
Subject: HTML coding
Module: Text and lists
Task: Mark up common written content.
Plan: Use paragraphs for prose and appropriate list elements for grouped items. Identify the user-facing outcome, the required information architecture, the semantic element for each content block, accessibility obligations, and concrete ... | {
"format": "TEXT",
"subject": "HTML coding and web development",
"agentic_expansion": "eight-stage task execution and acceptance review",
"quality_checked": true,
"schema_version": "html-agentic-mixed-v1"
} |
Subject: HTML coding
Module: Links
Task: Create useful and safe hyperlinks.
Plan: Cover destinations, relative versus absolute URLs, descriptive text, fragments, and new-tab safety. Identify the user-facing outcome, the required information architecture, the semantic element for each content block, accessibility obliga... | {
"format": "TEXT",
"subject": "HTML coding and web development",
"agentic_expansion": "eight-stage task execution and acceptance review",
"quality_checked": true,
"schema_version": "html-agentic-mixed-v1"
} |
Subject: HTML coding
Module: Images and media
Task: Add image content accessibly and debug missing assets.
Plan: Use img syntax, decide alt text by image purpose, and verify file paths. Identify the user-facing outcome, the required information architecture, the semantic element for each content block, accessibility ob... | {
"format": "TEXT",
"subject": "HTML coding and web development",
"agentic_expansion": "eight-stage task execution and acceptance review",
"quality_checked": true,
"schema_version": "html-agentic-mixed-v1"
} |
Subject: HTML coding
Module: Accessible forms
Task: Create an accessible, submit-ready contact form foundation.
Plan: Pair labels and controls, use meaningful names and types, group related inputs, and provide errors clearly. Identify the user-facing outcome, the required information architecture, the semantic element ... | {
"format": "TEXT",
"subject": "HTML coding and web development",
"agentic_expansion": "eight-stage task execution and acceptance review",
"quality_checked": true,
"schema_version": "html-agentic-mixed-v1"
} |
Subject: HTML coding
Module: Tables
Task: Use tables for data rather than layout.
Plan: Create a table with caption, headers, and data cells. Identify the user-facing outcome, the required information architecture, the semantic element for each content block, accessibility obligations, and concrete acceptance criteria ... | {
"format": "TEXT",
"subject": "HTML coding and web development",
"agentic_expansion": "eight-stage task execution and acceptance review",
"quality_checked": true,
"schema_version": "html-agentic-mixed-v1"
} |
End of preview.