feat: replaced NLTK's implementation of BLEU with sacrebleu's implementation #1744
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dosubot
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added
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Added sacrebleu
Updated BLEU documentation.
shahules786
approved these changes
Dec 12, 2024
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NLTK's implementation of BLEU is limited. In particular, only 20% of my attempts to compute BLEU return a score because the number of candidate and reference sentences are not the same, a requirement of NLTK's implementation. The implementation of BLEU by sacrebleu is recommended because it is more robust. In my PR, I have modified _bleu_score.py to use sacrebleu's implementation.