
'''simple docstring'''







import argparse
import shutil
from pathlib import Path

from tqdm import tqdm

from transformers import AutoTokenizer





def 					UpperCAmelCase_		(__a      :    List[Any] ,	__a      :    Optional[int] ,	__a      :    str ,	__a      :    Any=1_0_2_4 ):






   """simple docstring"""

   _a,  _a				:	Any			=   [], []

   _a				:	List[str]			=   list(zip(UpperCamelCase__ ,	UpperCamelCase__ ) )
   _a,  _a				:	Optional[Any]			=   sorted_examples[0]

   def is_too_big(__a      :    List[str] ):
      return tok(UpperCamelCase__ ,	return_tensors='pt' ).input_ids.shape[1] > max_tokens

   for src, tgt in tqdm(sorted_examples[1:] ):
      _a				:	List[Any]			=   new_src + ' ' + src
      _a				:	Optional[int]			=   new_tgt + ' ' + tgt
      if is_too_big(UpperCamelCase__ ) or is_too_big(UpperCamelCase__ ):  # cant fit, finalize example
         finished_src.append(UpperCamelCase__ )
         finished_tgt.append(UpperCamelCase__ )
         _a,  _a				:	Dict			=   src, tgt
      else:  # can fit, keep adding
         _a,  _a				:	List[str]			=   cand_src, cand_tgt

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





def 					UpperCAmelCase_		(__a      :    str ,	__a      :    Path ,	__a      :    Optional[int] ,	__a      :    str ):






   """simple docstring"""

   _a				:	Dict			=   Path(UpperCamelCase__ )
   save_path.mkdir(exist_ok=UpperCamelCase__ )
   for split in ["train"]:
      _a,  _a				:	List[str]			=   data_dir / f"""{split}.source""", data_dir / f"""{split}.target"""
      _a				:	Tuple			=   [x.rstrip() for x in Path(UpperCamelCase__ ).open().readlines()]
      _a				:	Union[str, Any]			=   [x.rstrip() for x in Path(UpperCamelCase__ ).open().readlines()]
      _a,  _a				:	Optional[int]			=   pack_examples(UpperCamelCase__ ,	UpperCamelCase__ ,	UpperCamelCase__ ,	UpperCamelCase__ )
      print(f"""packed {split} split from {len(UpperCamelCase__ )} examples -> {len(UpperCamelCase__ )}.""" )
      Path(save_path / f"""{split}.source""" ).open('w' ).write('\n'.join(UpperCamelCase__ ) )
      Path(save_path / f"""{split}.target""" ).open('w' ).write('\n'.join(UpperCamelCase__ ) )
   for split in ["val", "test"]:
      _a,  _a				:	Union[str, Any]			=   data_dir / f"""{split}.source""", data_dir / f"""{split}.target"""
      shutil.copyfile(UpperCamelCase__ ,	save_path / f"""{split}.source""" )
      shutil.copyfile(UpperCamelCase__ ,	save_path / f"""{split}.target""" )





def 					UpperCAmelCase_		():






   """simple docstring"""

   _a				:	Any			=   argparse.ArgumentParser()
   parser.add_argument('--tok_name' ,	type=UpperCamelCase__ ,	help='like facebook/bart-large-cnn,t5-base, etc.' )
   parser.add_argument('--max_seq_len' ,	type=UpperCamelCase__ ,	default=1_2_8 )
   parser.add_argument('--data_dir' ,	type=UpperCamelCase__ )
   parser.add_argument('--save_path' ,	type=UpperCamelCase__ )
   _a				:	Optional[int]			=   parser.parse_args()
   _a				:	Optional[Any]			=   AutoTokenizer.from_pretrained(args.tok_name )
   return pack_data_dir(UpperCamelCase__ ,	Path(args.data_dir ) ,	args.max_seq_len ,	args.save_path )


if __name__ == "__main__":
  packer_cli()









def 			lowerCamelCase_		(       UpperCamelCase__				:      int      )     ->       bool:





				"""simple docstring"""


				return number & 1 == 0


if __name__ == "__main__":
					import doctest

					doctest.testmod()


