





import argparse
import shutil
from pathlib import Path

from tqdm import tqdm

from transformers import AutoTokenizer





def  __magic_name__  (				lowercase				,       lowercase				,       lowercase				,       lowercase=1024				)				-> int:

							"""simple docstring"""



							lowercase_				,		lowercase_	:   str  				=     [], []

							lowercase_	:   str  				=     list(zip(lowercase				,       lowercase				)				)
							lowercase_				,		lowercase_	:   Tuple  				=     sorted_examples[0]

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

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

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





def  __magic_name__  (				lowercase				,       lowercase				,       lowercase				,       lowercase				)				-> Dict:

							"""simple docstring"""



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





def  __magic_name__  (				)				-> Optional[Any]:

							"""simple docstring"""



							lowercase_	:   Dict  				=     argparse.ArgumentParser()
							parser.add_argument("""--tok_name"""				,       type=lowercase				,       help="""like facebook/bart-large-cnn,t5-base, etc."""				)
							parser.add_argument("""--max_seq_len"""				,       type=lowercase				,       default=128				)
							parser.add_argument("""--data_dir"""				,       type=lowercase				)
							parser.add_argument("""--save_path"""				,       type=lowercase				)
							lowercase_	:   str  				=     parser.parse_args()
							lowercase_	:   Union[str, Any]  				=     AutoTokenizer.from_pretrained(args.tok_name				)
							return pack_data_dir(lowercase				,       Path(args.data_dir				)				,       args.max_seq_len				,       args.save_path				)


if __name__ == "__main__":
							packer_cli()






def  __magic_name__  (				lowercase = 100				)				-> int:

							"""simple docstring"""



							lowercase_	:   Dict  				=     (n * (n + 1) // 2) ** 2
							lowercase_	:   List[str]  				=     n * (n + 1) * (2 * n + 1) // 6
							return sum_cubes - sum_squares


if __name__ == "__main__":
							print(F'''{solution() = }''')