[Fix] Restore missing commas in extract_characters_regex prefix list#1560
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YoungZSh wants to merge 2 commits into
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[Fix] Restore missing commas in extract_characters_regex prefix list#1560YoungZSh wants to merge 2 commits into
YoungZSh wants to merge 2 commits into
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Two pairs of adjacent string literals in the answer_prefixes list inside extract_characters_regex are missing commas, so Python silently concatenates them at parse time. Four prefixes that were intended to be stripped before regex matching are therefore never stripped: - 'The best option is' + 'The correct option is' -> 'The best option isThe correct option is' - 'Best answer:' + 'Best option:' -> 'Best answer:Best option:' The two 'Best ...' prefixes are the harmful pair: the 'B' in 'Best' is itself an option letter, so a model that responds with e.g. 'Best answer: D' has the leading 'B' matched by re.search(r'[ABCDE]', s) and is scored as 'B' instead of 'D'. Add the two missing commas so each of the four prefixes is its own list element and gets stripped as intended.
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Summary
Two pairs of adjacent string literals in the
answer_prefixeslist insideextract_characters_regex(vlmeval/dataset/utils/multiple_choice.py) aremissing commas, so Python silently concatenates them at parse time. Four
prefixes that were intended to be stripped before regex matching are
therefore never stripped:
'The best option is'+'The correct option is'→
'The best option isThe correct option is''Best answer:'+'Best option:'→
'Best answer:Best option:'The two
Best ...prefixes are the harmful pair, because theBinBestis itself an option letter: a model that responds with e.g.
"Best answer: D"will have the leadingBmatched byre.search(r'[ABCDE]', s)and be scored asBinstead ofD.Fix
Add the two missing commas so each of the four prefixes is its own list
element and gets stripped as intended. No behaviour change for predictions
that did not already contain
"Best answer:"/"Best option:"prefixes.