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Update rouge function to take in a tokenizer. #981

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Update rouge function to take in a tokenizer. #981

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7 changes: 5 additions & 2 deletions t5/evaluation/metrics.py
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Original file line number Diff line number Diff line change
Expand Up @@ -65,20 +65,23 @@ def bleu(targets, predictions):
return {"bleu": bleu_score.score}


def rouge(targets, predictions, score_keys=None):
def rouge(targets, predictions, score_keys=None, tokenizer=None):
"""Computes rouge score.

Args:
targets: list of strings
predictions: list of strings
score_keys: list of strings with the keys to compute.
tokenizer: Tokenizer to use. Should be an instance of
third_party/google_research/google_research/rouge/tokenizers.Tokenizer. If
not specified, tokenizers.DefaultTokenizer is used.
Returns:
dict with score_key: rouge score across all targets and predictions
"""

if score_keys is None:
score_keys = ["rouge1", "rouge2", "rougeLsum"]
scorer = rouge_scorer.RougeScorer(score_keys)
scorer = rouge_scorer.RougeScorer(score_keys, tokenizer=tokenizer)
aggregator = scoring.BootstrapAggregator()

def _prepare_summary(summary):
Expand Down