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[Fix] Match verbose Chain-of-Thought in eval #1552

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[Fix] Match verbose Chain-of-Thought in eval #1552

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11 changes: 11 additions & 0 deletions vlmeval/utils/matching_util.py
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Original file line number Diff line number Diff line change
Expand Up @@ -9,6 +9,12 @@
logger = get_logger(__name__)


# Matches verbose chain-of-thought answers such as:
# "The correct answer is **B**. Here's why: ..."
# "The answer is C."
_VERBOSE_ANSWER_RE = re.compile(r"(?i)(?:correct\s+)?answer\s+is\s+\**([ABCD])\**")


def can_infer_option(answer, choices):
verbose = os.environ.get('VERBOSE', 0)
# Choices is a dictionary
Expand Down Expand Up @@ -47,6 +53,11 @@ def count_choice(splits, choices, prefix='', suffix=''):
return ch
elif count == 0 and count_choice(splits, {'Z', ''}) == 1:
return 'Z'

match = _VERBOSE_ANSWER_RE.search(answer or "")
if match and match.group(1).upper() in choices:
return match.group(1).upper()

return False


Expand Down