BleuScoreEvaluator Class

Evaluator that computes the BLEU Score between two strings.

BLEU (Bilingual Evaluation Understudy) score is commonly used in natural language processing (NLP) and machine translation. It is widely used in text summarization and text generation use cases. It evaluates how closely the generated text matches the reference text. The BLEU score ranges from 0 to 1, with higher scores indicating better quality.

Usage

   eval_fn = BleuScoreEvaluator()
   result = eval_fn(
       response="Tokyo is the capital of Japan.",
       ground_truth="The capital of Japan is Tokyo.")

Output format

   {
       "bleu_score": 0.22
   }