


"""simple docstring"""







import argparse
import shutil
from pathlib import Path

from tqdm import tqdm

from transformers import AutoTokenizer




def    UpperCAmelCase__       (lowerCAmelCase_  ,						lowerCAmelCase_  ,						lowerCAmelCase_  ,						lowerCAmelCase_=1024   ):




					'''simple docstring'''


					__SCREAMING_SNAKE_CASE   ,  __SCREAMING_SNAKE_CASE						   =				[], []

					__SCREAMING_SNAKE_CASE						   =				list(zip(lowerCAmelCase_  ,						lowerCAmelCase_   )   )
					__SCREAMING_SNAKE_CASE   ,  __SCREAMING_SNAKE_CASE						   =				sorted_examples[0]

					def is_too_big(lowerCAmelCase_   ):
										return tok(lowerCAmelCase_  ,						return_tensors="pt"   ).input_ids.shape[1] > max_tokens

					for src, tgt in tqdm(sorted_examples[1:]   ):
										__SCREAMING_SNAKE_CASE						   =				new_src + " " + src
										__SCREAMING_SNAKE_CASE						   =				new_tgt + " " + tgt
										if is_too_big(lowerCAmelCase_   ) or is_too_big(lowerCAmelCase_   ):  # cant fit, finalize example
															finished_src.append(lowerCAmelCase_   )
															finished_tgt.append(lowerCAmelCase_   )
															__SCREAMING_SNAKE_CASE   ,  __SCREAMING_SNAKE_CASE						   =				src, tgt
										else:  # can fit, keep adding
															__SCREAMING_SNAKE_CASE   ,  __SCREAMING_SNAKE_CASE						   =				cand_src, cand_tgt

    # cleanup
					if new_src:
										assert new_tgt
										finished_src.append(lowerCAmelCase_   )
										finished_tgt.append(lowerCAmelCase_   )
					return finished_src, finished_tgt




def    UpperCAmelCase__       (lowerCAmelCase_  ,						lowerCAmelCase_  ,						lowerCAmelCase_  ,						lowerCAmelCase_   ):




					'''simple docstring'''


					__SCREAMING_SNAKE_CASE						   =				Path(lowerCAmelCase_   )
					save_path.mkdir(exist_ok=lowerCAmelCase_   )
					for split in ["train"]:
										__SCREAMING_SNAKE_CASE   ,  __SCREAMING_SNAKE_CASE						   =				data_dir / f"""{split}.source""", data_dir / f"""{split}.target"""
										__SCREAMING_SNAKE_CASE						   =				[x.rstrip() for x in Path(lowerCAmelCase_   ).open().readlines()]
										__SCREAMING_SNAKE_CASE						   =				[x.rstrip() for x in Path(lowerCAmelCase_   ).open().readlines()]
										__SCREAMING_SNAKE_CASE   ,  __SCREAMING_SNAKE_CASE						   =				pack_examples(lowerCAmelCase_  ,						lowerCAmelCase_  ,						lowerCAmelCase_  ,						lowerCAmelCase_   )
										print(f"""packed {split} split from {len(lowerCAmelCase_   )} examples -> {len(lowerCAmelCase_   )}."""   )
										Path(save_path / f"""{split}.source"""   ).open("w"   ).write("\n".join(lowerCAmelCase_   )   )
										Path(save_path / f"""{split}.target"""   ).open("w"   ).write("\n".join(lowerCAmelCase_   )   )
					for split in ["val", "test"]:
										__SCREAMING_SNAKE_CASE   ,  __SCREAMING_SNAKE_CASE						   =				data_dir / f"""{split}.source""", data_dir / f"""{split}.target"""
										shutil.copyfile(lowerCAmelCase_  ,						save_path / f"""{split}.source"""   )
										shutil.copyfile(lowerCAmelCase_  ,						save_path / f"""{split}.target"""   )




def    UpperCAmelCase__       ():




					'''simple docstring'''


					__SCREAMING_SNAKE_CASE						   =				argparse.ArgumentParser()
					parser.add_argument("--tok_name"  ,						type=lowerCAmelCase_  ,						help="like facebook/bart-large-cnn,t5-base, etc."   )
					parser.add_argument("--max_seq_len"  ,						type=lowerCAmelCase_  ,						default=128   )
					parser.add_argument("--data_dir"  ,						type=lowerCAmelCase_   )
					parser.add_argument("--save_path"  ,						type=lowerCAmelCase_   )
					__SCREAMING_SNAKE_CASE						   =				parser.parse_args()
					__SCREAMING_SNAKE_CASE						   =				AutoTokenizer.from_pretrained(args.tok_name   )
					return pack_data_dir(lowerCAmelCase_  ,						Path(args.data_dir   )  ,						args.max_seq_len  ,						args.save_path   )


if __name__ == "__main__":
		packer_cli()




"""simple docstring"""







from abc import ABC, abstractmethod
from argparse import ArgumentParser




class  UpperCamelCase_	( UpperCamelCase):

	"""simple docstring"""





	@staticmethod
	@abstractmethod
	def   UpperCAmelCase_      ( UpperCAmelCase__			:				ArgumentParser   )       ->	int:
						raise NotImplementedError()




	@abstractmethod
	def   UpperCAmelCase_      ( self			:				int   )       ->	Optional[int]:
						raise NotImplementedError()
