






"""simple docstring"""
from typing import TYPE_CHECKING

from ...utils import OptionalDependencyNotAvailable, _LazyModule, is_torch_available, is_vision_available


A_			: str				=			{"configuration_levit": ["LEVIT_PRETRAINED_CONFIG_ARCHIVE_MAP", "LevitConfig", "LevitOnnxConfig"]}

try:
      if not is_vision_available():
            raise OptionalDependencyNotAvailable()
except OptionalDependencyNotAvailable:
      pass
else:
      A_			: Dict				=			["LevitFeatureExtractor"]
      A_			: Optional[int]				=			["LevitImageProcessor"]

try:
      if not is_torch_available():
            raise OptionalDependencyNotAvailable()
except OptionalDependencyNotAvailable:
      pass
else:
      A_			: Dict				=			[
          "LEVIT_PRETRAINED_MODEL_ARCHIVE_LIST",
          "LevitForImageClassification",
          "LevitForImageClassificationWithTeacher",
          "LevitModel",
          "LevitPreTrainedModel",
      ]


if TYPE_CHECKING:
      from .configuration_levit import LEVIT_PRETRAINED_CONFIG_ARCHIVE_MAP, LevitConfig, LevitOnnxConfig

      try:
            if not is_vision_available():
                  raise OptionalDependencyNotAvailable()
      except OptionalDependencyNotAvailable:
            pass
      else:
            from .feature_extraction_levit import LevitFeatureExtractor
            from .image_processing_levit import LevitImageProcessor

      try:
            if not is_torch_available():
                  raise OptionalDependencyNotAvailable()
      except OptionalDependencyNotAvailable:
            pass
      else:
            from .modeling_levit import (
                LEVIT_PRETRAINED_MODEL_ARCHIVE_LIST,
                LevitForImageClassification,
                LevitForImageClassificationWithTeacher,
                LevitModel,
                LevitPreTrainedModel,
            )
else:
      import sys

      A_			: Union[str, Any]				=			_LazyModule(__name__, globals()["__file__"], _import_structure, module_spec=__spec__)









from collections import Counter

import sacrebleu
import sacremoses
from packaging import version

import datasets


__snake_case			:			Union[str, Any]			   =   """\
@inproceedings{xu-etal-2016-optimizing,
title = {Optimizing Statistical Machine Translation for Text Simplification},
authors={Xu, Wei and Napoles, Courtney and Pavlick, Ellie and Chen, Quanze and Callison-Burch, Chris},
journal = {Transactions of the Association for Computational Linguistics},
volume = {4},
year={2016},
url = {https://www.aclweb.org/anthology/Q16-1029},
pages = {401--415},
}
"""

__snake_case			:			Dict			   =   """\
SARI is a metric used for evaluating automatic text simplification systems.
The metric compares the predicted simplified sentences against the reference
and the source sentences. It explicitly measures the goodness of words that are
added, deleted and kept by the system.
Sari = (F1_add + F1_keep + P_del) / 3
where
F1_add: n-gram F1 score for add operation
F1_keep: n-gram F1 score for keep operation
P_del: n-gram precision score for delete operation
n = 4, as in the original paper.

This implementation is adapted from Tensorflow's tensor2tensor implementation [3].
It has two differences with the original GitHub [1] implementation:
  (1) Defines 0/0=1 instead of 0 to give higher scores for predictions that match
      a target exactly.
  (2) Fixes an alleged bug [2] in the keep score computation.
[1] https://github.com/cocoxu/simplification/blob/master/SARI.py
    (commit 0210f15)
[2] https://github.com/cocoxu/simplification/issues/6
[3] https://github.com/tensorflow/tensor2tensor/blob/master/tensor2tensor/utils/sari_hook.py
"""


__snake_case			:			int			   =   """
Calculates sari score (between 0 and 100) given a list of source and predicted
sentences, and a list of lists of reference sentences.
Args:
    sources: list of source sentences where each sentence should be a string.
    predictions: list of predicted sentences where each sentence should be a string.
    references: list of lists of reference sentences where each sentence should be a string.
Returns:
    sari: sari score
Examples:
    >>> sources=[\"About 95 species are currently accepted .\"]
    >>> predictions=[\"About 95 you now get in .\"]
    >>> references=[[\"About 95 species are currently known .\",\"About 95 species are now accepted .\",\"95 species are now accepted .\"]]
    >>> sari = datasets.load_metric(\"sari\")
    >>> results = sari.compute(sources=sources, predictions=predictions, references=references)
    >>> print(results)
    {'sari': 26.953601953601954}
"""







def 		_UpperCamelCase      (			UpperCamelCase_				:    Optional[Any]			,				UpperCamelCase_				:    Optional[int]			,				UpperCamelCase_				:    Dict			,				UpperCamelCase_				:    int						)     ->      Union[str, Any]:

						"""simple docstring"""



						lowerCAmelCase__			  =  [rgram for rgrams in rgramslist for rgram in rgrams]
						lowerCAmelCase__			  =  Counter(UpperCamelCase_						)

						lowerCAmelCase__			  =  Counter(UpperCamelCase_						)
						lowerCAmelCase__			  =  Counter()
						for sgram, scount in sgramcounter.items():
												lowerCAmelCase__			  =  scount * numref

						lowerCAmelCase__			  =  Counter(UpperCamelCase_						)
						lowerCAmelCase__			  =  Counter()
						for cgram, ccount in cgramcounter.items():
												lowerCAmelCase__			  =  ccount * numref

						# KEEP
						lowerCAmelCase__			  =  sgramcounter_rep & cgramcounter_rep
						lowerCAmelCase__			  =  keepgramcounter_rep & rgramcounter
						lowerCAmelCase__			  =  sgramcounter_rep & rgramcounter

						lowerCAmelCase__			  =  0
						lowerCAmelCase__			  =  0
						for keepgram in keepgramcountergood_rep:
												keeptmpscorea += keepgramcountergood_rep[keepgram] / keepgramcounter_rep[keepgram]
												# Fix an alleged bug [2] in the keep score computation.
												# keeptmpscore2 += keepgramcountergood_rep[keepgram] / keepgramcounterall_rep[keepgram]
												keeptmpscorea += keepgramcountergood_rep[keepgram]
						# Define 0/0=1 instead of 0 to give higher scores for predictions that match
						#      a target exactly.
						lowerCAmelCase__			  =  1
						lowerCAmelCase__			  =  1
						if len(UpperCamelCase_						) > 0:
												lowerCAmelCase__			  =  keeptmpscorea / len(UpperCamelCase_						)
						if len(UpperCamelCase_						) > 0:
												# Fix an alleged bug [2] in the keep score computation.
												# keepscore_recall = keeptmpscore2 / len(keepgramcounterall_rep)
												lowerCAmelCase__			  =  keeptmpscorea / sum(keepgramcounterall_rep.values()						)
						lowerCAmelCase__			  =  0
						if keepscore_precision > 0 or keepscore_recall > 0:
												lowerCAmelCase__			  =  2 * keepscore_precision * keepscore_recall / (keepscore_precision + keepscore_recall)

						# DELETION
						lowerCAmelCase__			  =  sgramcounter_rep - cgramcounter_rep
						lowerCAmelCase__			  =  delgramcounter_rep - rgramcounter
						lowerCAmelCase__			  =  sgramcounter_rep - rgramcounter
						lowerCAmelCase__			  =  0
						lowerCAmelCase__			  =  0
						for delgram in delgramcountergood_rep:
												deltmpscorea += delgramcountergood_rep[delgram] / delgramcounter_rep[delgram]
												deltmpscorea += delgramcountergood_rep[delgram] / delgramcounterall_rep[delgram]
						# Define 0/0=1 instead of 0 to give higher scores for predictions that match
						# a target exactly.
						lowerCAmelCase__			  =  1
						if len(UpperCamelCase_						) > 0:
												lowerCAmelCase__			  =  deltmpscorea / len(UpperCamelCase_						)

						# ADDITION
						lowerCAmelCase__			  =  set(UpperCamelCase_						) - set(UpperCamelCase_						)
						lowerCAmelCase__			  =  set(UpperCamelCase_						) & set(UpperCamelCase_						)
						lowerCAmelCase__			  =  set(UpperCamelCase_						) - set(UpperCamelCase_						)

						lowerCAmelCase__			  =  0
						for addgram in addgramcountergood:
												addtmpscore += 1

						# Define 0/0=1 instead of 0 to give higher scores for predictions that match
						# a target exactly.
						lowerCAmelCase__			  =  1
						lowerCAmelCase__			  =  1
						if len(UpperCamelCase_						) > 0:
												lowerCAmelCase__			  =  addtmpscore / len(UpperCamelCase_						)
						if len(UpperCamelCase_						) > 0:
												lowerCAmelCase__			  =  addtmpscore / len(UpperCamelCase_						)
						lowerCAmelCase__			  =  0
						if addscore_precision > 0 or addscore_recall > 0:
												lowerCAmelCase__			  =  2 * addscore_precision * addscore_recall / (addscore_precision + addscore_recall)

						return (keepscore, delscore_precision, addscore)







def 		_UpperCamelCase      (			UpperCamelCase_				:    Any			,				UpperCamelCase_				:    Union[str, Any]			,				UpperCamelCase_				:    Optional[int]						)     ->      List[Any]:

						"""simple docstring"""



						lowerCAmelCase__			  =  len(UpperCamelCase_						)

						lowerCAmelCase__			  =  ssent.split(' '						)
						lowerCAmelCase__			  =  csent.split(' '						)
						lowerCAmelCase__			  =  []
						lowerCAmelCase__			  =  []
						lowerCAmelCase__			  =  []
						lowerCAmelCase__			  =  []
						lowerCAmelCase__			  =  []
						lowerCAmelCase__			  =  []

						lowerCAmelCase__			  =  []
						lowerCAmelCase__			  =  []
						lowerCAmelCase__			  =  []
						lowerCAmelCase__			  =  []
						for rsent in rsents:
												lowerCAmelCase__			  =  rsent.split(' '						)
												lowerCAmelCase__			  =  []
												lowerCAmelCase__			  =  []
												lowerCAmelCase__			  =  []
												ragramslist.append(UpperCamelCase_						)
												for i in range(0			,				len(UpperCamelCase_						) - 1						):
																		if i < len(UpperCamelCase_						) - 1:
																								lowerCAmelCase__			  =  ragrams[i] + ' ' + ragrams[i + 1]
																								ragrams.append(UpperCamelCase_						)
																		if i < len(UpperCamelCase_						) - 2:
																								lowerCAmelCase__			  =  ragrams[i] + ' ' + ragrams[i + 1] + ' ' + ragrams[i + 2]
																								ragrams.append(UpperCamelCase_						)
																		if i < len(UpperCamelCase_						) - 3:
																								lowerCAmelCase__			  =  ragrams[i] + ' ' + ragrams[i + 1] + ' ' + ragrams[i + 2] + ' ' + ragrams[i + 3]
																								ragrams.append(UpperCamelCase_						)
												ragramslist.append(UpperCamelCase_						)
												ragramslist.append(UpperCamelCase_						)
												ragramslist.append(UpperCamelCase_						)

						for i in range(0			,				len(UpperCamelCase_						) - 1						):
												if i < len(UpperCamelCase_						) - 1:
																		lowerCAmelCase__			  =  sagrams[i] + ' ' + sagrams[i + 1]
																		sagrams.append(UpperCamelCase_						)
												if i < len(UpperCamelCase_						) - 2:
																		lowerCAmelCase__			  =  sagrams[i] + ' ' + sagrams[i + 1] + ' ' + sagrams[i + 2]
																		sagrams.append(UpperCamelCase_						)
												if i < len(UpperCamelCase_						) - 3:
																		lowerCAmelCase__			  =  sagrams[i] + ' ' + sagrams[i + 1] + ' ' + sagrams[i + 2] + ' ' + sagrams[i + 3]
																		sagrams.append(UpperCamelCase_						)

						for i in range(0			,				len(UpperCamelCase_						) - 1						):
												if i < len(UpperCamelCase_						) - 1:
																		lowerCAmelCase__			  =  cagrams[i] + ' ' + cagrams[i + 1]
																		cagrams.append(UpperCamelCase_						)
												if i < len(UpperCamelCase_						) - 2:
																		lowerCAmelCase__			  =  cagrams[i] + ' ' + cagrams[i + 1] + ' ' + cagrams[i + 2]
																		cagrams.append(UpperCamelCase_						)
												if i < len(UpperCamelCase_						) - 3:
																		lowerCAmelCase__			  =  cagrams[i] + ' ' + cagrams[i + 1] + ' ' + cagrams[i + 2] + ' ' + cagrams[i + 3]
																		cagrams.append(UpperCamelCase_						)

						((lowerCAmelCase__)  ,				(lowerCAmelCase__)  ,				(lowerCAmelCase__))			  =  SARIngram(UpperCamelCase_			,				UpperCamelCase_			,				UpperCamelCase_			,				UpperCamelCase_						)
						((lowerCAmelCase__)  ,				(lowerCAmelCase__)  ,				(lowerCAmelCase__))			  =  SARIngram(UpperCamelCase_			,				UpperCamelCase_			,				UpperCamelCase_			,				UpperCamelCase_						)
						((lowerCAmelCase__)  ,				(lowerCAmelCase__)  ,				(lowerCAmelCase__))			  =  SARIngram(UpperCamelCase_			,				UpperCamelCase_			,				UpperCamelCase_			,				UpperCamelCase_						)
						((lowerCAmelCase__)  ,				(lowerCAmelCase__)  ,				(lowerCAmelCase__))			  =  SARIngram(UpperCamelCase_			,				UpperCamelCase_			,				UpperCamelCase_			,				UpperCamelCase_						)
						lowerCAmelCase__			  =  sum([keepascore, keepascore, keepascore, keepascore]						) / 4
						lowerCAmelCase__			  =  sum([delascore, delascore, delascore, delascore]						) / 4
						lowerCAmelCase__			  =  sum([addascore, addascore, addascore, addascore]						) / 4
						lowerCAmelCase__			  =  (avgkeepscore + avgdelscore + avgaddscore) / 3
						return finalscore







def 		_UpperCamelCase      (			UpperCamelCase_				:    Dict			,				UpperCamelCase_				:    bool = True			,				UpperCamelCase_				:    str = "13a"			,				UpperCamelCase_				:    bool = True						)     ->      List[str]:

						"""simple docstring"""



						if lowercase:
												lowerCAmelCase__			  =  sentence.lower()

						if tokenizer in ["13a", "intl"]:
												if version.parse(sacrebleu.__version__						).major >= 2:
																		lowerCAmelCase__			  =  sacrebleu.metrics.bleu._get_tokenizer(UpperCamelCase_						)()(UpperCamelCase_						)
												else:
																		lowerCAmelCase__			  =  sacrebleu.TOKENIZERS[tokenizer]()(UpperCamelCase_						)
						elif tokenizer == "moses":
												lowerCAmelCase__			  =  sacremoses.MosesTokenizer().tokenize(UpperCamelCase_			,				return_str=UpperCamelCase_			,				escape=UpperCamelCase_						)
						elif tokenizer == "penn":
												lowerCAmelCase__			  =  sacremoses.MosesTokenizer().penn_tokenize(UpperCamelCase_			,				return_str=UpperCamelCase_						)
						else:
												lowerCAmelCase__			  =  sentence

						if not return_str:
												lowerCAmelCase__			  =  normalized_sent.split()

						return normalized_sent


@datasets.utils.file_utils.add_start_docstrings(_DESCRIPTION						,    _KWARGS_DESCRIPTION)
class 			__SCREAMING_SNAKE_CASE    (      datasets.Metric):






						def 					UpperCamelCase__					(		self      ):






												"""simple docstring"""
												return datasets.MetricInfo(
												    description=_DESCRIPTION   ,  citation=_CITATION   ,  inputs_description=_KWARGS_DESCRIPTION   ,  features=datasets.Features(
												        {
												            'sources': datasets.Value('string'   ,  id='sequence'      ),
												            'predictions': datasets.Value('string'   ,  id='sequence'      ),
												            'references': datasets.Sequence(datasets.Value('string'   ,  id='sequence'      )   ,  id='references'      ),
												        }      )   ,  codebase_urls=[
												        'https://github.com/cocoxu/simplification/blob/master/SARI.py',
												        'https://github.com/tensorflow/tensor2tensor/blob/master/tensor2tensor/utils/sari_hook.py',
												    ]   ,  reference_urls=['https://www.aclweb.org/anthology/Q16-1029.pdf']   ,  )







						def 					UpperCamelCase__					(		self   ,  _UpperCamelCase   ,  _UpperCamelCase   ,  _UpperCamelCase      ):






												"""simple docstring"""
												if not (len(_UpperCamelCase      ) == len(_UpperCamelCase      ) == len(_UpperCamelCase      )):
																		raise ValueError('Sources length must match predictions and references lengths.'      )
												lowerCAmelCase__			  =  0
												for src, pred, refs in zip(_UpperCamelCase   ,  _UpperCamelCase   ,  _UpperCamelCase      ):
																		sari_score += SARIsent(normalize(_UpperCamelCase      )   ,  normalize(_UpperCamelCase      )   ,  [normalize(_UpperCamelCase      ) for sent in refs]      )
												lowerCAmelCase__			  =  sari_score / len(_UpperCamelCase      )
												return {"sari": 1_00 * sari_score}





