Add .conll / .conllu dataset format loader (CoNLL-2003 / 2000 / U)#8219
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Reads CoNLL-style files (one token per line, columns whitespace-separated, blank lines = sentence boundaries) into one row per sentence with lists aligned across configurable column names. - Supports CoNLL-2003 NER, CoNLL-2000 chunking, CoNLL-U, and arbitrary custom column schemas via ConllConfig.column_names. - Configurable delimiter (default: any whitespace), comment_prefix (CoNLL-U `#`), and skip_docstart (CoNLL-2003 -DOCSTART- markers). - Registered for .conll and .conllu extensions in _EXTENSION_TO_MODULE (the .conllu mapping pre-sets comment_prefix="#"). - Pads short rows / truncates long rows to keep column alignment. Closes huggingface#7757. Design discussed with namesarnav who suggested basing the implementation on the text builder shape since CoNLL files are line-based.
lhoestq
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May 26, 2026
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Sorry for the delay it looks all good to me, just running the CI and if grren let's merge :)
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Closes #7757.
Summary
Adds a
packaged_modules/conll/builder so.conlland.conllufiles load directly viaload_dataset(...)without manual parsing scripts. Each row of the loaded dataset corresponds to one sentence, with each configured column produced as a list aligned with the token list.Builder shape mirrors the
textpackaged module (line-based reading) — as suggested by @namesarnav in the issue thread.