




'''simple docstring'''
from copy import deepcopy
class   __UpperCAmelCase				:



					'''simple docstring'''





					def __init__(	self     :						Optional[int]      ,       _lowercase     :						List[str] = None      ,       _lowercase     :						Optional[int] = None)    ->							None:

								if arr is None and size is not None:
											A_									= size
											A_									= [0] * size
								elif arr is not None:
											self.init(A_)
								else:
											raise ValueError('Either arr or size must be specified')



					def     __snake_case						(	self     :						int      ,       _lowercase     :						str)    ->							None:
								A_									= len(A_)
								A_									= deepcopy(A_)
								for i in range(1      ,       self.size):
											A_									= self.next_(A_)
											if j < self.size:
														self.tree[j] += self.tree[i]



					def     __snake_case						(	self     :						str)    ->							list[int]:
								A_									= self.tree[:]
								for i in range(self.size - 1      ,       0      ,       -1):
											A_									= self.next_(A_)
											if j < self.size:
														arr[j] -= arr[i]
								return arr



					@staticmethod
					def     __snake_case						(	_lowercase     :						List[Any])    ->							int:
								return index + (index & (-index))



					@staticmethod
					def     __snake_case						(	_lowercase     :						int)    ->							int:
								return index - (index & (-index))



					def     __snake_case						(	self     :						str      ,       _lowercase     :						str      ,       _lowercase     :						str)    ->							None:
								if index == 0:
											self.tree[0] += value
											return
								while index < self.size:
											self.tree[index] += value
											A_									= self.next_(A_)



					def     __snake_case						(	self     :						str      ,       _lowercase     :						int      ,       _lowercase     :						Tuple)    ->							None:
								self.add(A_      ,       value - self.get(A_))



					def     __snake_case						(	self     :						Optional[Any]      ,       _lowercase     :						Optional[int])    ->							int:
								if right == 0:
											return 0
								A_									= self.tree[0]
								right -= 1  # make right inclusive
								while right > 0:
											result += self.tree[right]
											A_									= self.prev(A_)
								return result



					def     __snake_case						(	self     :						Union[str, Any]      ,       _lowercase     :						int      ,       _lowercase     :						Tuple)    ->							int:
								return self.prefix(A_) - self.prefix(A_)



					def     __snake_case						(	self     :						int      ,       _lowercase     :						Union[str, Any])    ->							int:
								return self.query(A_      ,       index + 1)



					def     __snake_case						(	self     :						Dict      ,       _lowercase     :						Union[str, Any])    ->							int:
								value -= self.tree[0]
								if value < 0:
											return -1

								A_									= 1  # Largest power of 2 <= size
								while j * 2 < self.size:
											j *= 2

								A_									= 0

								while j > 0:
											if i + j < self.size and self.tree[i + j] <= value:
														value -= self.tree[i + j]
														i += j
											j //= 2
								return i


if __name__ == "__main__":
							import doctest

							doctest.testmod()











import argparse
import shutil
from pathlib import Path

from tqdm import tqdm

from transformers import AutoTokenizer






def 				_UpperCAmelCase			(    A				,							A				,							A				,							A=1024     ):




   '''simple docstring'''

   UpperCAmelCase__			,							UpperCAmelCase__						=[], []

   UpperCAmelCase__						=list(zip(A				,							A     )     )
   UpperCAmelCase__			,							UpperCAmelCase__						=sorted_examples[0]

   def is_too_big(A     ):
      return tok(A				,							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(A     ) or is_too_big(A     ):  # cant fit, finalize example
         finished_src.append(A     )
         finished_tgt.append(A     )
         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(A     )
      finished_tgt.append(A     )
   return finished_src, finished_tgt






def 				_UpperCAmelCase			(    A				,							A				,							A				,							A     ):




   '''simple docstring'''

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






def 				_UpperCAmelCase			(    ):




   '''simple docstring'''

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


if __name__ == "__main__":
    packer_cli()



