
import multiprocessing
import os
from typing import BinaryIO, Optional, Union

from .. import Dataset, Features, NamedSplit, config
from ..formatting import query_table
from ..packaged_modules.csv.csv import Csv
from ..utils import logging
from ..utils.typing import NestedDataStructureLike, PathLike
from .abc import AbstractDatasetReader





class      _lowerCAmelCase (     __a	):




				def __init__( self    ,    _UpperCamelCase    ,    _UpperCamelCase = None    ,    _UpperCamelCase = None    ,    _UpperCamelCase = None    ,    _UpperCamelCase = False    ,    _UpperCamelCase = False    ,    _UpperCamelCase = None    ,    **_UpperCamelCase    ,    )    ->				List[str]:
							super().__init__(
							    _UpperCamelCase    ,    split=_UpperCamelCase    ,    features=_UpperCamelCase    ,    cache_dir=_UpperCamelCase    ,    keep_in_memory=_UpperCamelCase    ,    streaming=_UpperCamelCase    ,    num_proc=_UpperCamelCase    ,    **_UpperCamelCase    ,    )
							lowerCAmelCase_      =     path_or_paths if isinstance(_UpperCamelCase    ,    _UpperCamelCase					) else {self.split: path_or_paths}
							lowerCAmelCase_      =     Csv(
							    cache_dir=_UpperCamelCase    ,    data_files=_UpperCamelCase    ,    features=_UpperCamelCase    ,    **_UpperCamelCase    ,    )




				def 					__a						( self					)    ->				List[str]:
							# Build iterable dataset
							if self.streaming:
										lowerCAmelCase_      =     self.builder.as_streaming_dataset(split=self.split					)
							# Build regular (map-style) dataset
							else:
										lowerCAmelCase_      =     None
										lowerCAmelCase_      =     None
										lowerCAmelCase_      =     None
										lowerCAmelCase_      =     None

										self.builder.download_and_prepare(
										    download_config=_UpperCamelCase    ,    download_mode=_UpperCamelCase    ,    verification_mode=_UpperCamelCase    ,    base_path=_UpperCamelCase    ,    num_proc=self.num_proc    ,    )
										lowerCAmelCase_      =     self.builder.as_dataset(
										    split=self.split    ,    verification_mode=_UpperCamelCase    ,    in_memory=self.keep_in_memory					)
							return dataset





class      _lowerCAmelCase :




				def __init__( self    ,    _UpperCamelCase    ,    _UpperCamelCase    ,    _UpperCamelCase = None    ,    _UpperCamelCase = None    ,    **_UpperCamelCase    ,    )    ->				Optional[int]:
							if num_proc is not None and num_proc <= 0:
										raise ValueError(f"""num_proc {num_proc} must be an integer > 0."""					)

							lowerCAmelCase_      =     dataset
							lowerCAmelCase_      =     path_or_buf
							lowerCAmelCase_      =     batch_size if batch_size else config.DEFAULT_MAX_BATCH_SIZE
							lowerCAmelCase_      =     num_proc
							lowerCAmelCase_      =     "utf-8"
							lowerCAmelCase_      =     to_csv_kwargs




				def 					__a						( self					)    ->				int:
							lowerCAmelCase_      =     self.to_csv_kwargs.pop("path_or_buf"    ,    _UpperCamelCase					)
							lowerCAmelCase_      =     self.to_csv_kwargs.pop("header"    ,    _UpperCamelCase					)
							lowerCAmelCase_      =     self.to_csv_kwargs.pop("index"    ,    _UpperCamelCase					)

							if isinstance(self.path_or_buf    ,    (str, bytes, os.PathLike)					):
										with open(self.path_or_buf    ,    "wb+"					) as buffer:
													lowerCAmelCase_      =     self._write(file_obj=_UpperCamelCase    ,    header=_UpperCamelCase    ,    index=_UpperCamelCase    ,    **self.to_csv_kwargs					)
							else:
										lowerCAmelCase_      =     self._write(file_obj=self.path_or_buf    ,    header=_UpperCamelCase    ,    index=_UpperCamelCase    ,    **self.to_csv_kwargs					)
							return written




				def 					__a						( self    ,    _UpperCamelCase					)    ->				Optional[Any]:
							lowerCAmelCase_     ,  lowerCAmelCase_     ,  lowerCAmelCase_     ,  lowerCAmelCase_      =     args

							lowerCAmelCase_      =     query_table(
							    table=self.dataset.data    ,    key=slice(_UpperCamelCase    ,    offset + self.batch_size					)    ,    indices=self.dataset._indices    ,    )
							lowerCAmelCase_      =     batch.to_pandas().to_csv(
							    path_or_buf=_UpperCamelCase    ,    header=header if (offset == 0) else False    ,    index=_UpperCamelCase    ,    **_UpperCamelCase					)
							return csv_str.encode(self.encoding					)




				def 					__a						( self    ,    _UpperCamelCase    ,    _UpperCamelCase    ,    _UpperCamelCase    ,    **_UpperCamelCase					)    ->				int:
							lowerCAmelCase_      =     0

							if self.num_proc is None or self.num_proc == 1:
										for offset in logging.tqdm(
										    range(0    ,    len(self.dataset					)    ,    self.batch_size					)    ,    unit="ba"    ,    disable=not logging.is_progress_bar_enabled()    ,    desc="Creating CSV from Arrow format"    ,    ):
													lowerCAmelCase_      =     self._batch_csv((offset, header, index, to_csv_kwargs)					)
													written += file_obj.write(_UpperCamelCase					)

							else:
										lowerCAmelCase_     ,  lowerCAmelCase_      =     len(self.dataset					), self.batch_size
										with multiprocessing.Pool(self.num_proc					) as pool:
													for csv_str in logging.tqdm(
													    pool.imap(
													        self._batch_csv    ,    [(offset, header, index, to_csv_kwargs) for offset in range(0    ,    _UpperCamelCase    ,    _UpperCamelCase					)]    ,    )    ,    total=(num_rows // batch_size) + 1 if num_rows % batch_size else num_rows // batch_size    ,    unit="ba"    ,    disable=not logging.is_progress_bar_enabled()    ,    desc="Creating CSV from Arrow format"    ,    ):
																written += file_obj.write(_UpperCamelCase					)

							return written





from __future__ import annotations






def        lowerCamelCase__    (    __lowerCAmelCase  :  int   ,							__lowerCAmelCase  :  int   ,							__lowerCAmelCase  :  int    ):




			"""simple docstring"""


			assert n > 1 and a > 0 and greatest_common_divisor(__lowerCAmelCase   ,							__lowerCAmelCase    ) == 1
			((lowerCAmelCase_)     ,  (lowerCAmelCase_)     ,  (lowerCAmelCase_))      =     extended_gcd(__lowerCAmelCase   ,							__lowerCAmelCase    )  # Implemented below
			lowerCAmelCase_      =     (b * s) % n
			return x






def        lowerCamelCase__    (    __lowerCAmelCase  :  int   ,							__lowerCAmelCase  :  int    ):




			"""simple docstring"""


			((lowerCAmelCase_)     ,  (lowerCAmelCase_))      =     extended_euclid(__lowerCAmelCase   ,							__lowerCAmelCase    )  # Implemented below
			if b < 0:
						lowerCAmelCase_      =     (b % n + n) % n
			return b






def        lowerCamelCase__    (    __lowerCAmelCase  :  int   ,							__lowerCAmelCase  :  int   ,							__lowerCAmelCase  :  int    ):




			"""simple docstring"""


			lowerCAmelCase_      =     invert_modulo(__lowerCAmelCase   ,							__lowerCAmelCase    )
			lowerCAmelCase_      =     (b * s) % n
			return x






def        lowerCamelCase__    (    __lowerCAmelCase  :  int   ,							__lowerCAmelCase  :  int    ):




			"""simple docstring"""


			assert a >= 0 and b >= 0

			if b == 0:
						lowerCAmelCase_     ,  lowerCAmelCase_     ,  lowerCAmelCase_      =     a, 1, 0
			else:
						((lowerCAmelCase_)     ,  (lowerCAmelCase_)     ,  (lowerCAmelCase_))      =     extended_gcd(__lowerCAmelCase   ,							a % b    )
						lowerCAmelCase_      =     q
						lowerCAmelCase_      =     p - q * (a // b)

			assert a % d == 0 and b % d == 0
			assert d == a * x + b * y

			return (d, x, y)






def        lowerCamelCase__    (    __lowerCAmelCase  :  int   ,							__lowerCAmelCase  :  int    ):




			"""simple docstring"""


			if b == 0:
						return (1, 0)
			((lowerCAmelCase_)     ,  (lowerCAmelCase_))      =     extended_euclid(__lowerCAmelCase   ,							a % b    )
			lowerCAmelCase_      =     a // b
			return (y, x - k * y)






def        lowerCamelCase__    (    __lowerCAmelCase  :  int   ,							__lowerCAmelCase  :  int    ):




			"""simple docstring"""


			if a < b:
						lowerCAmelCase_     ,  lowerCAmelCase_      =     b, a

			while a % b != 0:
						lowerCAmelCase_     ,  lowerCAmelCase_      =     b, a % b

			return b


if __name__ == "__main__":
			from doctest import testmod

			testmod(name="modular_division", verbose=True)
			testmod(name="modular_division2", verbose=True)
			testmod(name="invert_modulo", verbose=True)
			testmod(name="extended_gcd", verbose=True)
			testmod(name="extended_euclid", verbose=True)
			testmod(name="greatest_common_divisor", verbose=True)



