






import argparse
import shutil
from pathlib import Path

from tqdm import tqdm

from transformers import AutoTokenizer





def  _lowerCamelCase					(   a_				: str						,			a_				: int						,			a_				: List[str]						,			a_				: str=10_24):
			lowerCamelCase  ,    lowerCamelCase						:Tuple						  =     [], []

			lowerCamelCase						:List[Any]						  =     list(zip(_UpperCamelCase						,			_UpperCamelCase))
			lowerCamelCase  ,    lowerCamelCase						:List[Any]						  =     sorted_examples[0]

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

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

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





def  _lowerCamelCase					(   a_				: List[str]						,			a_				: Path						,			a_				: Optional[int]						,			a_				: Any):
			lowerCamelCase						:Optional[int]						  =     Path(_UpperCamelCase)
			save_path.mkdir(exist_ok=_UpperCamelCase)
			for split in ["train"]:
						lowerCamelCase  ,    lowerCamelCase						:Any						  =     data_dir / F"{split}.source", data_dir / F"{split}.target"
						lowerCamelCase						:Optional[int]						  =     [x.rstrip() for x in Path(_UpperCamelCase).open().readlines()]
						lowerCamelCase						:List[Any]						  =     [x.rstrip() for x in Path(_UpperCamelCase).open().readlines()]
						lowerCamelCase  ,    lowerCamelCase						:Any						  =     pack_examples(_UpperCamelCase						,			_UpperCamelCase						,			_UpperCamelCase						,			_UpperCamelCase)
						print(F"packed {split} split from {len(_UpperCamelCase)} examples -> {len(_UpperCamelCase)}.")
						Path(save_path / F"{split}.source").open('''w''').write('''\n'''.join(_UpperCamelCase))
						Path(save_path / F"{split}.target").open('''w''').write('''\n'''.join(_UpperCamelCase))
			for split in ["val", "test"]:
						lowerCamelCase  ,    lowerCamelCase						:Dict						  =     data_dir / F"{split}.source", data_dir / F"{split}.target"
						shutil.copyfile(_UpperCamelCase						,			save_path / F"{split}.source")
						shutil.copyfile(_UpperCamelCase						,			save_path / F"{split}.target")





def  _lowerCamelCase					(   ):
			lowerCamelCase						:Dict						  =     argparse.ArgumentParser()
			parser.add_argument('''--tok_name'''						,			type=_UpperCamelCase						,			help='''like facebook/bart-large-cnn,t5-base, etc.''')
			parser.add_argument('''--max_seq_len'''						,			type=_UpperCamelCase						,			default=1_28)
			parser.add_argument('''--data_dir'''						,			type=_UpperCamelCase)
			parser.add_argument('''--save_path'''						,			type=_UpperCamelCase)
			lowerCamelCase						:Union[str, Any]						  =     parser.parse_args()
			lowerCamelCase						:Any						  =     AutoTokenizer.from_pretrained(args.tok_name)
			return pack_data_dir(_UpperCamelCase						,			Path(args.data_dir)						,			args.max_seq_len						,			args.save_path)


if __name__ == "__main__":
			packer_cli()




import os
from typing import Optional

import fsspec
from fsspec.archive import AbstractArchiveFileSystem
from fsspec.utils import DEFAULT_BLOCK_SIZE
class   _lowerCAmelCase		(     __SCREAMING_SNAKE_CASE				):
							_UpperCAmelCase						    =     ''
							_UpperCAmelCase						    =     (
							    None  # protocol passed in prefix to the url. ex: "gzip", for gzip://file.txt::http://foo.bar/file.txt.gz
							)
							_UpperCAmelCase						    =     None  # compression type in fsspec. ex: "gzip"
							_UpperCAmelCase						    =     None  # extension of the filename to strip. ex: "".gz" to get file.txt from file.txt.gz







							def __init__(				self     :    str	,					__snake_case     :    str = ""	,					__snake_case     :    Optional[str] = None	,					__snake_case     :    Optional[dict] = None	,					**__snake_case     :    Dict		):
										super().__init__(self	,					**__snake_case		)
										# always open as "rb" since fsspec can then use the TextIOWrapper to make it work for "r" mode
										lowerCamelCase						:Optional[Any]						  =     fsspec.open(
										    __snake_case	,					mode='''rb'''	,					protocol=__snake_case	,					compression=self.compression	,					client_kwargs={
										        '''requote_redirect_url''': False,  # see https://github.com/huggingface/datasets/pull/5459
										        '''trust_env''': True,  # Enable reading proxy env variables.
										        **(target_options or {}).pop('''client_kwargs'''	,					{}		),  # To avoid issues if it was already passed.
										    }	,					**(target_options or {})	,					)
										lowerCamelCase						:List[str]						  =     os.path.basename(self.file.path.split('''::'''		)[0]		)
										lowerCamelCase						:Dict						  =     (
										    self.compressed_name[: self.compressed_name.rindex('''.'''		)]
										    if '''.''' in self.compressed_name
										    else self.compressed_name
										)
										lowerCamelCase						:List[str]						  =     None







							@classmethod
							def 				snake_case  (				cls     :    Any	,					__snake_case     :    Any		):
										# compressed file paths are always relative to the archive root
										return super()._strip_protocol(__snake_case		).lstrip('''/'''		)







							def 				snake_case  (				self     :    Any		):
										if self.dir_cache is None:
													lowerCamelCase						:Optional[Any]						  =     {**self.file.fs.info(self.file.path		), '''name''': self.uncompressed_name}
													lowerCamelCase						:Optional[Any]						  =     {f['''name''']: f}







							def 				snake_case  (				self     :    Union[str, Any]	,					__snake_case     :    str		):
										return self.file.open().read()







							def 				snake_case  (				self     :    Optional[int]	,					__snake_case     :    str	,					__snake_case     :    str = "rb"	,					__snake_case     :    int=None	,					__snake_case     :    Optional[int]=True	,					__snake_case     :    str=None	,					**__snake_case     :    str	,					):
										lowerCamelCase						:List[str]						  =     self._strip_protocol(__snake_case		)
										if mode != "rb":
													raise ValueError(F"Tried to read with mode {mode} on file {self.file.path} opened with mode 'rb'"		)
										return self.file.open()


class   _lowerCAmelCase		(     __SCREAMING_SNAKE_CASE				):
							_UpperCAmelCase						    =     'bz2'
							_UpperCAmelCase						    =     'bz2'
							_UpperCAmelCase						    =     '.bz2'


class   _lowerCAmelCase		(     __SCREAMING_SNAKE_CASE				):
							_UpperCAmelCase						    =     'gzip'
							_UpperCAmelCase						    =     'gzip'
							_UpperCAmelCase						    =     '.gz'


class   _lowerCAmelCase		(     __SCREAMING_SNAKE_CASE				):
							_UpperCAmelCase						    =     'lz4'
							_UpperCAmelCase						    =     'lz4'
							_UpperCAmelCase						    =     '.lz4'


class   _lowerCAmelCase		(     __SCREAMING_SNAKE_CASE				):
							_UpperCAmelCase						    =     'xz'
							_UpperCAmelCase						    =     'xz'
							_UpperCAmelCase						    =     '.xz'


class   _lowerCAmelCase		(     __SCREAMING_SNAKE_CASE				):
							_UpperCAmelCase						    =     'zstd'
							_UpperCAmelCase						    =     'zstd'
							_UpperCAmelCase						    =     '.zst'







							def __init__(				self     :    str	,					__snake_case     :    str	,					__snake_case     :    str = "rb"	,					__snake_case     :    Optional[str] = None	,					__snake_case     :    Optional[dict] = None	,					__snake_case     :    int = DEFAULT_BLOCK_SIZE	,					**__snake_case     :    int	,					):
										super().__init__(
										    fo=__snake_case	,					mode=__snake_case	,					target_protocol=__snake_case	,					target_options=__snake_case	,					block_size=__snake_case	,					**__snake_case	,					)
										# We need to wrap the zstd decompressor to avoid this error in fsspec==2021.7.0 and zstandard==0.15.2:
										#
										# File "/Users/user/.virtualenvs/hf-datasets/lib/python3.7/site-packages/fsspec/core.py", line 145, in open
										#     out.close = close
										# AttributeError: 'zstd.ZstdDecompressionReader' object attribute 'close' is read-only
										#
										# see https://github.com/intake/filesystem_spec/issues/725
										lowerCamelCase						:Tuple						  =     self.file.__enter__
										class   _lowerCAmelCase		:







																	def __init__(				self     :    Dict	,					__snake_case     :    Tuple		):
																				lowerCamelCase						:Optional[int]						  =     file_







																	def __enter__(				self     :    Optional[int]		):
																				self._file.__enter__()
																				return self







																	def __exit__(				self     :    str	,					*__snake_case     :    Optional[Any]	,					**__snake_case     :    List[Any]		):
																				self._file.__exit__(*__snake_case	,					**__snake_case		)







																	def __iter__(				self     :    Optional[Any]		):
																				return iter(self._file		)







																	def 				snake_case  (				self     :    List[Any]		):
																				return next(self._file		)







																	def __getattr__(				self     :    Any	,					__snake_case     :    str		):
																				return getattr(self._file	,					__snake_case		)

										def fixed_enter(*__snake_case     :    Optional[int]	,					**__snake_case     :    str		):
													return WrappedFile(_enter(*__snake_case	,					**__snake_case		)		)

										lowerCamelCase						:Dict						  =     fixed_enter



