



"""simple docstring"""






import argparse
import shutil
from pathlib import Path

from tqdm import tqdm

from transformers import AutoTokenizer






def   snake_case__     (	__lowerCamelCase       :					str							,	__lowerCamelCase       :					Union[str, Any]							,	__lowerCamelCase       :					str							,	__lowerCamelCase       :					Dict=1024			):
			"""simple docstring"""
			lowerCamelCase__			,     lowerCamelCase__	:	Any				=[], []

			lowerCamelCase__	:	str				=list(zip(__lowerCamelCase							,	__lowerCamelCase			)			)
			lowerCamelCase__			,     lowerCamelCase__	:	List[Any]				=sorted_examples[0]

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

			for src, tgt in tqdm(sorted_examples[1:]			):
						lowerCamelCase__	:	List[Any]				=new_src + ''' ''' + src
						lowerCamelCase__	:	List[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__	:	Tuple				=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   snake_case__     (	__lowerCamelCase       :					Optional[Any]							,	__lowerCamelCase       :					Path							,	__lowerCamelCase       :					Optional[Any]							,	__lowerCamelCase       :					Union[str, Any]			):
			"""simple docstring"""
			lowerCamelCase__	:	Dict				=Path(__lowerCamelCase			)
			save_path.mkdir(exist_ok=__lowerCamelCase			)
			for split in ["train"]:
						lowerCamelCase__			,     lowerCamelCase__	:	str				=data_dir / f'''{split}.source''', data_dir / f'''{split}.target'''
						lowerCamelCase__	:	Optional[int]				=[x.rstrip() for x in Path(__lowerCamelCase			).open().readlines()]
						lowerCamelCase__	:	Optional[Any]				=[x.rstrip() for x in Path(__lowerCamelCase			).open().readlines()]
						lowerCamelCase__			,     lowerCamelCase__	:	List[str]				=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__	:	str				=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   snake_case__     (	):
			"""simple docstring"""
			lowerCamelCase__	:	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=128			)
			parser.add_argument('''--data_dir'''							,	type=__lowerCamelCase			)
			parser.add_argument('''--save_path'''							,	type=__lowerCamelCase			)
			lowerCamelCase__	:	Optional[int]				=parser.parse_args()
			lowerCamelCase__	:	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()









"""simple docstring"""






from __future__ import annotations

from collections.abc import Iterator

class  __SCREAMING_SNAKE_CASE			:


					'''simple docstring'''





					def __init__( self							:						str,						lowerCamelCase							:						int  )->      None:
								lowerCamelCase__	:	str				=value
								lowerCamelCase__	:	Node | None				=None
								lowerCamelCase__	:	Node | None				=None





class  __SCREAMING_SNAKE_CASE			:


					'''simple docstring'''





					def __init__( self							:						int,						lowerCamelCase							:						Node  )->      None:
								lowerCamelCase__	:	Any				=tree



					def 	snake_case ( self							:						str,						lowerCamelCase							:						Node | None  )->      int:
								if node is None:
											return 0
								return node.value + (
								    self.depth_first_search(node.left  ) + self.depth_first_search(node.right  )
								)




					def __iter__( self							:						Dict  )->      Iterator[int]:
								yield self.depth_first_search(self.tree  )


if __name__ == "__main__":
		import doctest

		doctest.testmod()




