jddlmZmZmZmZmZddlmZddlm Z m Z  ddl m Z eeeeeegefZGdde j$Zy#e$rdZ Y1wxYw))AnyCallableOptionalSequenceUnion)MetricComputationError) base_metric score_result) gleu_scoreNceZdZdZ ddeedededededeed dffd Z d ed e ee efd e d e jfdZxZS)GLEUa Sentence-level GLEU metric powered by ``nltk.translate.gleu_score``. References: - NLTK Reference Documentation on GLEU https://www.nltk.org/api/nltk.translate.gleu_score.html - OECD Catalogue of Tools & Metrics for Trustworthy AI https://oecd.ai/en/catalogue/metrics/google-bleu-gleu - Hugging Face Evaluate: Google BLEU (GLEU) metric overview https://huggingface.co/spaces/evaluate-metric/google_bleu Args: gleu_fn: Optional custom scoring callable compatible with ``nltk.translate.gleu_score.sentence_gleu``. Useful for testing. min_len: Minimum n-gram size considered. max_len: Maximum n-gram size considered. name: Display name for the metric result. track: Whether to automatically track metric results. project_name: Optional tracking project name. Example: >>> from opik.evaluation.metrics import GLEU >>> metric = GLEU(min_len=1, max_len=4) >>> result = metric.score( ... output="The cat sat on the mat", ... reference="The cat is on the mat", ... ) >>> round(result.value, 3) # doctest: +SKIP 0.816 Ngleu_fnmin_lenmax_lennametrack project_namereturncdksdkr tdkDr tdt| ||||||_yt t ddt t tdt tdtffd }||_y) Nrz.min_len and max_len must be positive integers.zmin_len cannot exceed max_len.)rrrzfGLEU metric requires the optional 'nltk' package. Install via `pip install nltk` or provide `gleu_fn`. references hypothesisrcHttj||S)N)rr)floatnltk_gleu_score sentence_gleu)rrrrs /Users/manta/Documents/Projects/TheRoad-I1/backend/.venv/lib/python3.12/site-packages/opik/evaluation/metrics/heuristics/gleu.py_scorerzGLEU.__init__.._scorerHs,#11"" ' ' ) ValueErrorsuper__init___gleu_fnr ImportErrorrstrr) selfrrrrrrr __class__s `` rr!z GLEU.__init__/s a<7a<MN N W => > d%lK  #DM&!@ $Xc]3 AI#  $DMroutput referenceignored_kwargsc |js td|j}t|tr|jg}n5t |}|s td|Dcgc]}|j}}t d|Dr td|j||}tjt||jdt|dScc}w)Nz!Candidate is empty (GLEU metric).z!Reference is empty (GLEU metric).c38K|]}t|dk(yw)rN)len).0refs r zGLEU.score..gs3 s3x1} sz/Reference contains empty segment (GLEU metric).z GLEU score: z.4f)valuerreason) striprsplit isinstancer$listanyr"r ScoreResultrr) r%r'r(r)hypothesis_tokensrref_listr.scores rr:z GLEU.scoreVs ||~()LM M"LLN i %#//+,JIH,-PQQ19:##))+J: 3 3 3(A  j*;<'',!%,s!34  ;s*C*)N gleu_metricTN)__name__ __module__ __qualname____doc__rGleuFnintr$boolr!rrrr r7r: __classcell__)r&s@rr r sB%)!&*%$&!%$%$ %$  %$  %$sm%$ %$N  hsm+,    ! !  rr )typingrrrrropik.exceptionsropik.evaluation.metricsr r nltk.translater rr#r$rrB BaseMetricr rrrLsf;;2=< 8HSM*HSM:EA Bb ; ! !b OsA AA