"""simple docstring"""






import argparse
import shutil
from pathlib import Path

from tqdm import tqdm

from transformers import AutoTokenizer



def   a_						(					lowerCamelCase					,			lowerCamelCase					,			lowerCamelCase					,			lowerCamelCase=1_0_2_4       ):
				UpperCAmelCase__      ,	UpperCAmelCase__             =							[], []

				UpperCAmelCase__             =							list(zip(lowerCamelCase					,			lowerCamelCase       )       )
				UpperCAmelCase__      ,	UpperCAmelCase__             =							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:]       ):
								UpperCAmelCase__             =							new_src + ' ' + src
								UpperCAmelCase__             =							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       )
												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(lowerCamelCase       )
								finished_tgt.append(lowerCamelCase       )
				return finished_src, finished_tgt



def   a_						(					lowerCamelCase					,			lowerCamelCase					,			lowerCamelCase					,			lowerCamelCase       ):
				UpperCAmelCase__             =							Path(lowerCamelCase       )
				save_path.mkdir(exist_ok=lowerCamelCase       )
				for split in ["train"]:
								UpperCAmelCase__      ,	UpperCAmelCase__             =							data_dir / f'''{split}.source''', data_dir / f'''{split}.target'''
								UpperCAmelCase__             =							[x.rstrip() for x in Path(lowerCamelCase       ).open().readlines()]
								UpperCAmelCase__             =							[x.rstrip() for x in Path(lowerCamelCase       ).open().readlines()]
								UpperCAmelCase__      ,	UpperCAmelCase__             =							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"]:
								UpperCAmelCase__      ,	UpperCAmelCase__             =							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   a_						(					):
				UpperCAmelCase__             =							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_2_8       )
				parser.add_argument('--data_dir'					,			type=lowerCamelCase       )
				parser.add_argument('--save_path'					,			type=lowerCamelCase       )
				UpperCAmelCase__             =							parser.parse_args()
				UpperCAmelCase__             =							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 import namedtuple
from dataclasses import dataclass
@dataclass
class 				snake_case       :




					"""simple docstring"""

					snake_case__				    = 42
					snake_case__				    = None
					snake_case__				    = None






lowerCAmelCase__  :  Union[str, Any]						     =	namedtuple('CoinsDistribResult', 'moves excess')



def   a_						(					lowerCamelCase       ):

				if root is None:
								return 0

				# Validation
				def count_nodes(lowerCamelCase       ) -> int:
								if node is None:
												return 0

								return count_nodes(node.left       ) + count_nodes(node.right       ) + 1

				def count_coins(lowerCamelCase       ) -> int:
								if node is None:
												return 0

								return count_coins(node.left       ) + count_coins(node.right       ) + node.data

				if count_nodes(lowerCamelCase       ) != count_coins(lowerCamelCase       ):
								raise ValueError('The nodes number should be same as the number of coins'       )

				# Main calculation
				def get_distrib(lowerCamelCase       ) -> CoinsDistribResult:

								if node is None:
												return CoinsDistribResult(0					,			1       )

								UpperCAmelCase__      ,	UpperCAmelCase__             =							get_distrib(node.left       )
								UpperCAmelCase__      ,	UpperCAmelCase__             =							get_distrib(node.right       )

								UpperCAmelCase__             =							1 - left_distrib_excess
								UpperCAmelCase__             =							1 - right_distrib_excess

								UpperCAmelCase__             =							(
								    left_distrib_moves
								    + right_distrib_moves
								    + abs(lowerCamelCase       )
								    + abs(lowerCamelCase       )
								)
								UpperCAmelCase__             =							node.data - coins_to_left - coins_to_right

								return CoinsDistribResult(lowerCamelCase					,			lowerCamelCase       )

				return get_distrib(lowerCamelCase       )[0]


if __name__ == "__main__":
						import doctest

						doctest.testmod()



