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the return of AttackedText.word_diff_ratio is 1 all the time #787
Description
Describe the bug
the return of Attacked_text.word_diff_ratio is 1 all the time
To Reproduce
Steps to reproduce the behavior:
- Run following command
textattack ... - Run following code ...
- top_member.attacked_text.words_diff_ratio(initial_result.attacked_text)
- See error
reason
the type of AttackedText.words is list, when it is use as as input parameter of np.sum() it returns 1or 0 all the time, because it is always consider the first index of the input list
Activity
qiyanjun commentedon Aug 13, 2026
Confirmed and root-caused:
self.words != x.wordscompares two Python lists, which returns a single bool (not an elementwise mask), so the sum was always 0 or 1 regardless of how many words actually differ — your diagnosis aboutnp.sumwas on the right track. Fixed in #831 by comparing as numpy arrays. Will close automatically once that merges.Fix six more bugs from the unresolved-bugs triage list