


'''simple docstring'''





import argparse
import shutil
from pathlib import Path

from tqdm import tqdm

from transformers import AutoTokenizer






def 							_lowercase    (		SCREAMING_SNAKE_CASE_   :		Dict       ,  SCREAMING_SNAKE_CASE_   :		Optional[Any]       ,  SCREAMING_SNAKE_CASE_   :		Dict       ,  SCREAMING_SNAKE_CASE_   :		List[Any]=1_024	):





			"""simple docstring"""




			UpperCamelCase  ,  UpperCamelCase         =					[], []

			UpperCamelCase         =					list(zip(SCREAMING_SNAKE_CASE_       ,  SCREAMING_SNAKE_CASE_	)	)
			UpperCamelCase  ,  UpperCamelCase         =					sorted_examples[0]

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

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

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






def 							_lowercase    (		SCREAMING_SNAKE_CASE_   :		Any       ,  SCREAMING_SNAKE_CASE_   :		Path       ,  SCREAMING_SNAKE_CASE_   :		List[str]       ,  SCREAMING_SNAKE_CASE_   :		Optional[Any]	):





			"""simple docstring"""




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






def 							_lowercase    (		):





			"""simple docstring"""




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


if __name__ == "__main__":
			packer_cli()








def 							_lowercase    (		SCREAMING_SNAKE_CASE_   :		str	):





			"""simple docstring"""




			return [
			    txt[:a] + txt[a].upper() + txt[a + 1 :]
			    for a in range(len(SCREAMING_SNAKE_CASE_	)	)
			    if txt[a].isalpha()
			]


if __name__ == "__main__":
			__import__("doctest").testmod()




