'''simple docstring'''




from collections import Counter

import sacrebleu
import sacremoses
from packaging import version

import datasets


_lowercase		:					List[Any]													=		"\\n@inproceedings{xu-etal-2016-optimizing,\ntitle = {Optimizing Statistical Machine Translation for Text Simplification},\nauthors={Xu, Wei and Napoles, Courtney and Pavlick, Ellie and Chen, Quanze and Callison-Burch, Chris},\njournal = {Transactions of the Association for Computational Linguistics},\nvolume = {4},\nyear={2016},\nurl = {https://www.aclweb.org/anthology/Q16-1029},\npages = {401--415},\n}\n"

_lowercase		:					Optional[Any]													=		"\\nSARI is a metric used for evaluating automatic text simplification systems.\nThe metric compares the predicted simplified sentences against the reference\nand the source sentences. It explicitly measures the goodness of words that are\nadded, deleted and kept by the system.\nSari = (F1_add + F1_keep + P_del) / 3\nwhere\nF1_add: n-gram F1 score for add operation\nF1_keep: n-gram F1 score for keep operation\nP_del: n-gram precision score for delete operation\nn = 4, as in the original paper.\n\nThis implementation is adapted from Tensorflow's tensor2tensor implementation [3].\nIt has two differences with the original GitHub [1] implementation:\n  (1) Defines 0/0=1 instead of 0 to give higher scores for predictions that match\n      a target exactly.\n  (2) Fixes an alleged bug [2] in the keep score computation.\n[1] https://github.com/cocoxu/simplification/blob/master/SARI.py\n    (commit 0210f15)\n[2] https://github.com/cocoxu/simplification/issues/6\n[3] https://github.com/tensorflow/tensor2tensor/blob/master/tensor2tensor/utils/sari_hook.py\n"


_lowercase		:					Any													=		"\nCalculates sari score (between 0 and 100) given a list of source and predicted\nsentences, and a list of lists of reference sentences.\nArgs:\n    sources: list of source sentences where each sentence should be a string.\n    predictions: list of predicted sentences where each sentence should be a string.\n    references: list of lists of reference sentences where each sentence should be a string.\nReturns:\n    sari: sari score\nExamples:\n    >>> sources=[\"About 95 species are currently accepted .\"]\n    >>> predictions=[\"About 95 you now get in .\"]\n    >>> references=[[\"About 95 species are currently known .\",\"About 95 species are now accepted .\",\"95 species are now accepted .\"]]\n    >>> sari = datasets.load_metric(\"sari\")\n    >>> results = sari.compute(sources=sources, predictions=predictions, references=references)\n    >>> print(results)\n    {'sari': 26.953601953601954}\n"




def 				lowerCamelCase      ( UpperCAmelCase__			:   str , UpperCAmelCase__			:   str , UpperCAmelCase__			:   Optional[Any] , UpperCAmelCase__			:   Dict					)     -> Any:
							lowercase_   :     Optional[int]									=			[rgram for rgrams in rgramslist for rgram in rgrams]
							lowercase_   :     List[str]									=			Counter(UpperCAmelCase__					)

							lowercase_   :     Tuple									=			Counter(UpperCAmelCase__					)
							lowercase_   :     Optional[Any]									=			Counter()
							for sgram, scount in sgramcounter.items():
														lowercase_   :     Optional[int]									=			scount * numref

							lowercase_   :     Dict									=			Counter(UpperCAmelCase__					)
							lowercase_   :     str									=			Counter()
							for cgram, ccount in cgramcounter.items():
														lowercase_   :     str									=			ccount * numref

							# KEEP
							lowercase_   :     List[Any]									=			sgramcounter_rep & cgramcounter_rep
							lowercase_   :     Optional[int]									=			keepgramcounter_rep & rgramcounter
							lowercase_   :     int									=			sgramcounter_rep & rgramcounter

							lowercase_   :     Tuple									=			0
							lowercase_   :     int									=			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.
							lowercase_   :     int									=			1
							lowercase_   :     List[str]									=			1
							if len(UpperCAmelCase__					) > 0:
														lowercase_   :     Any									=			keeptmpscorea / len(UpperCAmelCase__					)
							if len(UpperCAmelCase__					) > 0:
														# Fix an alleged bug [2] in the keep score computation.
														# keepscore_recall = keeptmpscore2 / len(keepgramcounterall_rep)
														lowercase_   :     Tuple									=			keeptmpscorea / sum(keepgramcounterall_rep.values()					)
							lowercase_   :     int									=			0
							if keepscore_precision > 0 or keepscore_recall > 0:
														lowercase_   :     Any									=			2 * keepscore_precision * keepscore_recall / (keepscore_precision + keepscore_recall)

							# DELETION
							lowercase_   :     List[str]									=			sgramcounter_rep - cgramcounter_rep
							lowercase_   :     int									=			delgramcounter_rep - rgramcounter
							lowercase_   :     Tuple									=			sgramcounter_rep - rgramcounter
							lowercase_   :     str									=			0
							lowercase_   :     Optional[Any]									=			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.
							lowercase_   :     List[str]									=			1
							if len(UpperCAmelCase__					) > 0:
														lowercase_   :     str									=			deltmpscorea / len(UpperCAmelCase__					)

							# ADDITION
							lowercase_   :     int									=			set(UpperCAmelCase__					) - set(UpperCAmelCase__					)
							lowercase_   :     Dict									=			set(UpperCAmelCase__					) & set(UpperCAmelCase__					)
							lowercase_   :     List[Any]									=			set(UpperCAmelCase__					) - set(UpperCAmelCase__					)

							lowercase_   :     List[str]									=			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.
							lowercase_   :     Any									=			1
							lowercase_   :     Tuple									=			1
							if len(UpperCAmelCase__					) > 0:
														lowercase_   :     List[Any]									=			addtmpscore / len(UpperCAmelCase__					)
							if len(UpperCAmelCase__					) > 0:
														lowercase_   :     Any									=			addtmpscore / len(UpperCAmelCase__					)
							lowercase_   :     Union[str, Any]									=			0
							if addscore_precision > 0 or addscore_recall > 0:
														lowercase_   :     List[Any]									=			2 * addscore_precision * addscore_recall / (addscore_precision + addscore_recall)

							return (keepscore, delscore_precision, addscore)




def 				lowerCamelCase      ( UpperCAmelCase__			:   List[Any] , UpperCAmelCase__			:   Tuple , UpperCAmelCase__			:   Dict					)     -> Dict:
							lowercase_   :     Tuple									=			len(UpperCAmelCase__					)

							lowercase_   :     Tuple									=			ssent.split(""" """					)
							lowercase_   :     str									=			csent.split(""" """					)
							lowercase_   :     Optional[int]									=			[]
							lowercase_   :     Dict									=			[]
							lowercase_   :     str									=			[]
							lowercase_   :     Optional[int]									=			[]
							lowercase_   :     Dict									=			[]
							lowercase_   :     Optional[Any]									=			[]

							lowercase_   :     Union[str, Any]									=			[]
							lowercase_   :     Optional[Any]									=			[]
							lowercase_   :     List[Any]									=			[]
							lowercase_   :     List[str]									=			[]
							for rsent in rsents:
														lowercase_   :     str									=			rsent.split(""" """					)
														lowercase_   :     Dict									=			[]
														lowercase_   :     List[Any]									=			[]
														lowercase_   :     List[str]									=			[]
														ragramslist.append(UpperCAmelCase__					)
														for i in range(0 , len(UpperCAmelCase__					) - 1					):
																					if i < len(UpperCAmelCase__					) - 1:
																												lowercase_   :     str									=			ragrams[i] + """ """ + ragrams[i + 1]
																												ragrams.append(UpperCAmelCase__					)
																					if i < len(UpperCAmelCase__					) - 2:
																												lowercase_   :     str									=			ragrams[i] + """ """ + ragrams[i + 1] + """ """ + ragrams[i + 2]
																												ragrams.append(UpperCAmelCase__					)
																					if i < len(UpperCAmelCase__					) - 3:
																												lowercase_   :     str									=			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:
																					lowercase_   :     Optional[int]									=			sagrams[i] + """ """ + sagrams[i + 1]
																					sagrams.append(UpperCAmelCase__					)
														if i < len(UpperCAmelCase__					) - 2:
																					lowercase_   :     int									=			sagrams[i] + """ """ + sagrams[i + 1] + """ """ + sagrams[i + 2]
																					sagrams.append(UpperCAmelCase__					)
														if i < len(UpperCAmelCase__					) - 3:
																					lowercase_   :     List[Any]									=			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:
																					lowercase_   :     str									=			cagrams[i] + """ """ + cagrams[i + 1]
																					cagrams.append(UpperCAmelCase__					)
														if i < len(UpperCAmelCase__					) - 2:
																					lowercase_   :     List[Any]									=			cagrams[i] + """ """ + cagrams[i + 1] + """ """ + cagrams[i + 2]
																					cagrams.append(UpperCAmelCase__					)
														if i < len(UpperCAmelCase__					) - 3:
																					lowercase_   :     List[Any]									=			cagrams[i] + """ """ + cagrams[i + 1] + """ """ + cagrams[i + 2] + """ """ + cagrams[i + 3]
																					cagrams.append(UpperCAmelCase__					)

							((lowercase_)		,		(lowercase_)		,		(lowercase_))   :     Dict									=			SARIngram(UpperCAmelCase__ , UpperCAmelCase__ , UpperCAmelCase__ , UpperCAmelCase__					)
							((lowercase_)		,		(lowercase_)		,		(lowercase_))   :     List[Any]									=			SARIngram(UpperCAmelCase__ , UpperCAmelCase__ , UpperCAmelCase__ , UpperCAmelCase__					)
							((lowercase_)		,		(lowercase_)		,		(lowercase_))   :     Union[str, Any]									=			SARIngram(UpperCAmelCase__ , UpperCAmelCase__ , UpperCAmelCase__ , UpperCAmelCase__					)
							((lowercase_)		,		(lowercase_)		,		(lowercase_))   :     int									=			SARIngram(UpperCAmelCase__ , UpperCAmelCase__ , UpperCAmelCase__ , UpperCAmelCase__					)
							lowercase_   :     Optional[Any]									=			sum([keepascore, keepascore, keepascore, keepascore]					) / 4
							lowercase_   :     Optional[int]									=			sum([delascore, delascore, delascore, delascore]					) / 4
							lowercase_   :     int									=			sum([addascore, addascore, addascore, addascore]					) / 4
							lowercase_   :     Optional[Any]									=			(avgkeepscore + avgdelscore + avgaddscore) / 3
							return finalscore




def 				lowerCamelCase      ( UpperCAmelCase__			:   List[str] , UpperCAmelCase__			:   bool = True , UpperCAmelCase__			:   str = "13a" , UpperCAmelCase__			:   bool = True					)     -> Tuple:
							# Normalization is requried for the ASSET dataset (one of the primary
							# datasets in sentence simplification) to allow using space
							# to split the sentence. Even though Wiki-Auto and TURK datasets,
							# do not require normalization, we do it for consistency.
							# Code adapted from the EASSE library [1] written by the authors of the ASSET dataset.
							# [1] https://github.com/feralvam/easse/blob/580bba7e1378fc8289c663f864e0487188fe8067/easse/utils/preprocessing.py#L7

							if lowercase:
														lowercase_   :     Union[str, Any]									=			sentence.lower()

							if tokenizer in ["13a", "intl"]:
														if version.parse(sacrebleu.__version__					).major >= 2:
																					lowercase_   :     int									=			sacrebleu.metrics.bleu._get_tokenizer(UpperCAmelCase__					)()(UpperCAmelCase__					)
														else:
																					lowercase_   :     Tuple									=			sacrebleu.TOKENIZERS[tokenizer]()(UpperCAmelCase__					)
							elif tokenizer == "moses":
														lowercase_   :     Any									=			sacremoses.MosesTokenizer().tokenize(UpperCAmelCase__ , return_str=UpperCAmelCase__ , escape=UpperCAmelCase__					)
							elif tokenizer == "penn":
														lowercase_   :     Optional[Any]									=			sacremoses.MosesTokenizer().penn_tokenize(UpperCAmelCase__ , return_str=UpperCAmelCase__					)
							else:
														lowercase_   :     List[str]									=			sentence

							if not return_str:
														lowercase_   :     List[Any]									=			normalized_sent.split()

							return normalized_sent





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







			def       SCREAMING_SNAKE_CASE_	(      self							:    List[str]       ):
										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       SCREAMING_SNAKE_CASE_	(      self							:    Dict							,     lowercase_							:    Optional[Any]							,     lowercase_							:    Tuple							,     lowercase_							:    List[str]       ):
										if not (len(lowercase_       ) == len(lowercase_       ) == len(lowercase_       )):
																	raise ValueError("""Sources length must match predictions and references lengths."""       )
										lowercase_   :     Optional[Any]									=			0
										for src, pred, refs in zip(lowercase_							,     lowercase_							,     lowercase_       ):
																	sari_score += SARIsent(normalize(lowercase_       )							,     normalize(lowercase_       )							,     [normalize(lowercase_       ) for sent in refs]       )
										lowercase_   :     Optional[Any]									=			sari_score / len(lowercase_       )
										return {"sari": 100 * sari_score}






'''simple docstring'''




import argparse
import logging

import datasets
from tokenizers import Tokenizer, decoders, normalizers, pre_tokenizers, processors
from tokenizers.models import Unigram
from tokenizers.trainers import UnigramTrainer

from transformers import AlbertTokenizerFast


_lowercase		:					str													=		logging.getLogger(__name__)




def 				lowerCamelCase      ( )     -> Tuple:
							lowercase_   :     Any									=			argparse.ArgumentParser(description="""Train a unigram tokenizer on the wikitext dataset."""					)
							parser.add_argument(
							    """--dataset_name""" , type=UpperCAmelCase__ , default="""wikitext""" , help="""Name of the training. Explore datasets at: hf.co/datasets.""" , )
							parser.add_argument(
							    """--dataset_config""" , type=UpperCAmelCase__ , default="""wikitext-103-raw-v1""" , help="""Configuration name of the dataset."""					)
							parser.add_argument(
							    """--batch_size""" , type=UpperCAmelCase__ , default=1000 , help="""Batch size during training.""" , )
							parser.add_argument(
							    """--vocab_size""" , type=UpperCAmelCase__ , default=10048 , help="""Size of the desired vocabulary.""" , )
							parser.add_argument(
							    """--limit""" , default=UpperCAmelCase__ , type=UpperCAmelCase__ , help="""Limit the number of shards (used for debugging).""" , )
							parser.add_argument(
							    """--export_to_hub""" , action="""store_true""" , )

							lowercase_   :     List[Any]									=			parser.parse_args()
							return args




def 				lowerCamelCase      ( UpperCAmelCase__			:   Optional[int]					)     -> List[Any]:
							lowercase_   :     Any									=			datasets.load_dataset(args.dataset_name , args.dataset_config , split="""train"""					)

							if args.limit is not None:
														lowercase_   :     Optional[Any]									=			min(len(UpperCAmelCase__					) , args.limit					)
														lowercase_   :     Dict									=			dataset.select(range(UpperCAmelCase__					)					)
														logger.info(F'''Limiting the dataset to {args.limit} entries.'''					)

							def batch_iterator():
														for i in range(0 , len(UpperCAmelCase__					) , args.batch_size					):
																					yield dataset[i : i + args.batch_size]["text"]

    # Prepare the tokenizer.
							lowercase_   :     Optional[int]									=			Tokenizer(Unigram()					)
							lowercase_   :     Optional[int]									=			normalizers.Sequence([normalizers.Replace("""``""" , """\""""					), normalizers.Replace("""''""" , """\""""					)]					)
							lowercase_   :     List[Any]									=			pre_tokenizers.Metaspace()

							# Prepare the trainer.
							lowercase_   :     str									=			UnigramTrainer(
							    unk_token="""<unk>""" , special_tokens=["""[CLS]""", """[SEP]""", """<unk>""", """<pad>""", """[MASK]"""] , vocab_size=args.vocab_size , )

							logger.info("""Training the tokenizer."""					)
							tokenizer.train_from_iterator(batch_iterator() , trainer=UpperCAmelCase__					)
							logger.info("""Tokenizer training complete!"""					)

							lowercase_   :     Dict									=			tokenizer.token_to_id("""[CLS]"""					)
							lowercase_   :     Any									=			tokenizer.token_to_id("""[SEP]"""					)
							lowercase_   :     Optional[Any]									=			processors.TemplateProcessing(
							    single="""[CLS]:0 $A:0 [SEP]:0""" , pair="""[CLS]:0 $A:0 [SEP]:0 $B:1 [SEP]:1""" , special_tokens=[
							        ("""[CLS]""", cls_token_id),
							        ("""[SEP]""", sep_token_id),
							    ] , )
							lowercase_   :     int									=			decoders.Metaspace()

							if args.export_to_hub:
														logger.info("""Exporting the trained tokenzier to Hub."""					)
														lowercase_   :     Any									=			AlbertTokenizerFast(tokenizer_object=UpperCAmelCase__					)
														new_tokenizer.push_to_hub("""unigram-tokenizer-dataset"""					)


if __name__ == "__main__":
						_lowercase		:					Dict													=		parse_args()
						main(args)





