


'''simple docstring'''






import argparse
import shutil
from pathlib import Path

from tqdm import tqdm

from transformers import AutoTokenizer







def 							UpperCamelCase_     (       A__   :  Tuple				,       A__   :  List[str]				,       A__   :  Tuple				,       A__   :  Dict=10_24   ):
  '''simple docstring'''





  lowerCAmelCase_,				lowerCAmelCase_     : Optional[int]     =  [], []

  lowerCAmelCase_     : Union[str, Any]     =  list(zip(__lowerCAmelCase				,       __lowerCAmelCase   )   )
  lowerCAmelCase_,				lowerCAmelCase_     : Tuple     =  sorted_examples[0]

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

  for src, tgt in tqdm(sorted_examples[1:]   ):
    lowerCAmelCase_     : Any     =  new_src + """ """ + src
    lowerCAmelCase_     : Any     =  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   )
      lowerCAmelCase_,				lowerCAmelCase_     : Any     =  src, tgt
    else:  # can fit, keep adding
      lowerCAmelCase_,				lowerCAmelCase_     : Union[str, Any]     =  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_     (       A__   :  List[str]				,       A__   :  Optional[Any]				,       A__   :  int				,       A__   :  Any   ):
  '''simple docstring'''





  lowerCAmelCase_     : List[Any]     =  Path(__lowerCAmelCase   )
  save_path.mkdir(exist_ok=__lowerCAmelCase   )
  for split in ["train"]:
    lowerCAmelCase_,				lowerCAmelCase_     : Union[str, Any]     =  data_dir / f'{split}.source', data_dir / f'{split}.target'
    lowerCAmelCase_     : Tuple     =  [x.rstrip() for x in Path(__lowerCAmelCase   ).open().readlines()]
    lowerCAmelCase_     : List[str]     =  [x.rstrip() for x in Path(__lowerCAmelCase   ).open().readlines()]
    lowerCAmelCase_,				lowerCAmelCase_     : Union[str, Any]     =  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"]:
    lowerCAmelCase_,				lowerCAmelCase_     : Optional[Any]     =  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'''





  lowerCAmelCase_     : List[str]     =  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=1_28   )
  parser.add_argument("""--data_dir"""				,       type=__lowerCAmelCase   )
  parser.add_argument("""--save_path"""				,       type=__lowerCAmelCase   )
  lowerCAmelCase_     : int     =  parser.parse_args()
  lowerCAmelCase_     : Optional[int]     =  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()





import math

__magic_name__  							=	10
__magic_name__  							=	7
__magic_name__  							=	BALLS_PER_COLOUR * NUM_COLOURS





def 						SCREAMING_SNAKE_CASE__     (   __lowerCAmelCase = 20				):
    snake_case__    =					math.comb(__lowerCAmelCase     ,		__lowerCAmelCase				)
    snake_case__    =					math.comb(NUM_BALLS - BALLS_PER_COLOUR     ,		__lowerCAmelCase				)

    snake_case__    =					NUM_COLOURS * (1 - missing_colour / total)

    return F"""{result:.9f}"""


if __name__ == "__main__":
     print(solution(20))



