code: 
  
  
  import os
  import sys
  
  from . import rsa_key_generator as rkg
  
  SCREAMING_SNAKE_CASE : List[Any]          =    1_28
  SCREAMING_SNAKE_CASE : int          =    2_56
  
  
  
  
  
  def 						_lowerCamelCase		(							SCREAMING_SNAKE_CASE_				: str	,	SCREAMING_SNAKE_CASE_				: int = DEFAULT_BLOCK_SIZE      ):
  
  
  
  
  
  
  							"""simple docstring"""
  
  
  
  							a_       :   List[Any]			=	message.encode("""ascii"""      )
  
  							a_       :   Optional[int]			=	[]
  							for block_start in range(0	,	len(SCREAMING_SNAKE_CASE_      )	,	SCREAMING_SNAKE_CASE_      ):
  														a_       :   Optional[int]			=	0
  														for i in range(SCREAMING_SNAKE_CASE_	,	min(block_start + block_size	,	len(SCREAMING_SNAKE_CASE_      )      )      ):
  																					block_int += message_bytes[i] * (BYTE_SIZE ** (i % block_size))
  														block_ints.append(SCREAMING_SNAKE_CASE_      )
  							return block_ints
  
  
  
  
  
  def 						_lowerCamelCase		(							SCREAMING_SNAKE_CASE_				: list[int]	,	SCREAMING_SNAKE_CASE_				: int	,	SCREAMING_SNAKE_CASE_				: int = DEFAULT_BLOCK_SIZE      ):
  
  
  
  
  
  
  							"""simple docstring"""
  
  
  
  							a_       :   list[str]			=	[]
  							for block_int in block_ints:
  														a_       :   list[str]			=	[]
  														for i in range(block_size - 1	,	-1	,	-1      ):
  																					if len(SCREAMING_SNAKE_CASE_      ) + i < message_length:
  																												a_       :   Dict			=	block_int // (BYTE_SIZE**i)
  																												a_       :   Optional[int]			=	block_int % (BYTE_SIZE**i)
  																												block_message.insert(0	,	chr(SCREAMING_SNAKE_CASE_      )      )
  														message.extend(SCREAMING_SNAKE_CASE_      )
  							return "".join(SCREAMING_SNAKE_CASE_      )
  
  
  
  
  
  def 						_lowerCamelCase		(							SCREAMING_SNAKE_CASE_				: str	,	SCREAMING_SNAKE_CASE_				: tuple[int, int]	,	SCREAMING_SNAKE_CASE_				: int = DEFAULT_BLOCK_SIZE      ):
  
  
  
  
  
  
  							"""simple docstring"""
  
  
  
  							a_       :   Any			=	[]
  							a_       :   Tuple			=	key
  
  							for block in get_blocks_from_text(SCREAMING_SNAKE_CASE_	,	SCREAMING_SNAKE_CASE_      ):
  														encrypted_blocks.append(pow(SCREAMING_SNAKE_CASE_	,	SCREAMING_SNAKE_CASE_	,	SCREAMING_SNAKE_CASE_      )      )
  							return encrypted_blocks
  
  
  
  
  
  def 						_lowerCamelCase		(							SCREAMING_SNAKE_CASE_				: list[int]	,	SCREAMING_SNAKE_CASE_				: int	,	SCREAMING_SNAKE_CASE_				: tuple[int, int]	,	SCREAMING_SNAKE_CASE_				: int = DEFAULT_BLOCK_SIZE	,	):
  
  
  
  
  
  
  							"""simple docstring"""
  
  
  
  							a_       :   Optional[int]			=	[]
  							a_       :   Union[str, Any]			=	key
  							for block in encrypted_blocks:
  														decrypted_blocks.append(pow(SCREAMING_SNAKE_CASE_	,	SCREAMING_SNAKE_CASE_	,	SCREAMING_SNAKE_CASE_      )      )
  							return get_text_from_blocks(SCREAMING_SNAKE_CASE_	,	SCREAMING_SNAKE_CASE_	,	SCREAMING_SNAKE_CASE_      )
  
  
  
  
  
  def 						_lowerCamelCase		(							SCREAMING_SNAKE_CASE_				: str      ):
  
  
  
  
  
  
  							"""simple docstring"""
  
  
  
  							with open(SCREAMING_SNAKE_CASE_      ) as fo:
  														a_       :   List[Any]			=	fo.read()
  							a_       :   Optional[Any]			=	content.split(""","""      )
  							return (int(SCREAMING_SNAKE_CASE_      ), int(SCREAMING_SNAKE_CASE_      ), int(SCREAMING_SNAKE_CASE_      ))
  
  
  
  
  
  def 						_lowerCamelCase		(							SCREAMING_SNAKE_CASE_				: str	,	SCREAMING_SNAKE_CASE_				: str	,	SCREAMING_SNAKE_CASE_				: str	,	SCREAMING_SNAKE_CASE_				: int = DEFAULT_BLOCK_SIZE	,	):
  
  
  
  
  
  
  							"""simple docstring"""
  
  
  
  							a_       :   Any			=	read_key_file(SCREAMING_SNAKE_CASE_      )
  							if key_size < block_size * 8:
  														sys.exit(
  														    """ERROR: Block size is {} bits and key size is {} bits. The RSA cipher """
  														    """requires the block size to be equal to or greater than the key size. """
  														    """Either decrease the block size or use different keys.""".format(
  														        block_size * 8	,	SCREAMING_SNAKE_CASE_      )      )
  
  							a_       :   Tuple			=	[str(SCREAMING_SNAKE_CASE_      ) for i in encrypt_message(SCREAMING_SNAKE_CASE_	,	(n, e)	,	SCREAMING_SNAKE_CASE_      )]
  
  							a_       :   str			=	",".join(SCREAMING_SNAKE_CASE_      )
  							a_       :   Tuple			=	F"""{len(SCREAMING_SNAKE_CASE_      )}_{block_size}_{encrypted_content}"""
  							with open(SCREAMING_SNAKE_CASE_	,	"""w"""      ) as fo:
  														fo.write(SCREAMING_SNAKE_CASE_      )
  							return encrypted_content
  
  
  
  
  
  def 						_lowerCamelCase		(							SCREAMING_SNAKE_CASE_				: str	,	SCREAMING_SNAKE_CASE_				: str      ):
  
  
  
  
  
  
  							"""simple docstring"""
  
  
  
  							a_       :   Optional[Any]			=	read_key_file(SCREAMING_SNAKE_CASE_      )
  							with open(SCREAMING_SNAKE_CASE_      ) as fo:
  														a_       :   str			=	fo.read()
  							a_       :   Dict			=	content.split("""_"""      )
  							a_       :   str			=	int(SCREAMING_SNAKE_CASE_      )
  							a_       :   Optional[int]			=	int(SCREAMING_SNAKE_CASE_      )
  
  							if key_size < block_size * 8:
  														sys.exit(
  														    """ERROR: Block size is {} bits and key size is {} bits. The RSA cipher """
  														    """requires the block size to be equal to or greater than the key size. """
  														    """Did you specify the correct key file and encrypted file?""".format(
  														        block_size * 8	,	SCREAMING_SNAKE_CASE_      )      )
  
  							a_       :   Union[str, Any]			=	[]
  							for block in encrypted_message.split(""","""      ):
  														encrypted_blocks.append(int(SCREAMING_SNAKE_CASE_      )      )
  
  							return decrypt_message(SCREAMING_SNAKE_CASE_	,	SCREAMING_SNAKE_CASE_	,	(n, d)	,	SCREAMING_SNAKE_CASE_      )
  
  
  
  
  
  def 						_lowerCamelCase		(							):
  
  
  
  
  
  
  							"""simple docstring"""
  
  
  
  							a_       :   Optional[Any]			=	"encrypted_file.txt"
  							a_       :   Any			=	input(r"""Encrypt\Decrypt [e\d]: """      )
  
  							if response.lower().startswith("""e"""      ):
  														a_       :   str			=	"encrypt"
  							elif response.lower().startswith("""d"""      ):
  														a_       :   Union[str, Any]			=	"decrypt"
  
  							if mode == "encrypt":
  														if not os.path.exists("""rsa_pubkey.txt"""      ):
  																					rkg.make_key_files("""rsa"""	,	10_24      )
  
  														a_       :   List[str]			=	input("""\nEnter message: """      )
  														a_       :   List[str]			=	"rsa_pubkey.txt"
  														print(F"""Encrypting and writing to {filename}..."""      )
  														a_       :   Optional[int]			=	encrypt_and_write_to_file(SCREAMING_SNAKE_CASE_	,	SCREAMING_SNAKE_CASE_	,	SCREAMING_SNAKE_CASE_      )
  
  														print("""\nEncrypted text:"""      )
  														print(SCREAMING_SNAKE_CASE_      )
  
  							elif mode == "decrypt":
  														a_       :   Dict			=	"rsa_privkey.txt"
  														print(F"""Reading from {filename} and decrypting..."""      )
  														a_       :   int			=	read_from_file_and_decrypt(SCREAMING_SNAKE_CASE_	,	SCREAMING_SNAKE_CASE_      )
  														print("""writing decryption to rsa_decryption.txt..."""      )
  														with open("""rsa_decryption.txt"""	,	"""w"""      ) as dec:
  																					dec.write(SCREAMING_SNAKE_CASE_      )
  
  														print("""\nDecryption:"""      )
  														print(SCREAMING_SNAKE_CASE_      )
  
  
  if __name__ == "__main__":
  	main()
style_context: 
  
  
  import itertools
  from dataclasses import dataclass
  from typing import Optional
  
  import pyarrow as pa
  
  import datasets
  from datasets.table import table_cast
  
  
  SCREAMING_SNAKE_CASE : int          =    datasets.utils.logging.get_logger(__name__)
  
  
  
  
  
  @dataclass
  class 					snake_case__  ( datasets.BuilderConfig       ):
  	UpperCAmelCase   :							Optional[datasets.Features]         = None
  
  
  
  
  
  class 					snake_case__  ( datasets.ArrowBasedBuilder       ):
  	UpperCAmelCase   :							Optional[int]         = ArrowConfig
  
  
  
  
  
  	def     A				(  self							)		->			str:
  								"""simple docstring"""
  
  
  
  
  
  
  								return datasets.DatasetInfo(features=self.config.features							)
  
  
  
  
  
  	def     A				(  self				,    UpperCamelCase_							)		->			str:
  								"""simple docstring"""
  
  
  
  
  
  
  								if not self.config.data_files:
  															raise ValueError(f"""At least one data file must be specified, but got data_files={self.config.data_files}"""							)
  								a_       :   List[str]			=	dl_manager.download_and_extract(self.config.data_files							)
  								if isinstance(UpperCamelCase_				,    (str, list, tuple)							):
  															a_       :   Dict			=	data_files
  															if isinstance(UpperCamelCase_				,    UpperCamelCase_							):
  																						a_       :   Optional[Any]			=	[files]
  															# Use `dl_manager.iter_files` to skip hidden files in an extracted archive
  															a_       :   List[Any]			=	[dl_manager.iter_files(UpperCamelCase_							) for file in files]
  															return [datasets.SplitGenerator(name=datasets.Split.TRAIN				,    gen_kwargs={"""files""": files}							)]
  								a_       :   Any			=	[]
  								for split_name, files in data_files.items():
  															if isinstance(UpperCamelCase_				,    UpperCamelCase_							):
  																						a_       :   Dict			=	[files]
  															# Use `dl_manager.iter_files` to skip hidden files in an extracted archive
  															a_       :   List[Any]			=	[dl_manager.iter_files(UpperCamelCase_							) for file in files]
  															# Infer features is they are stoed in the arrow schema
  															if self.info.features is None:
  																						for file in itertools.chain.from_iterable(UpperCamelCase_							):
  																													with open(UpperCamelCase_				,    """rb"""							) as f:
  																																				a_       :   List[str]			=	datasets.Features.from_arrow_schema(pa.ipc.open_stream(UpperCamelCase_							).schema							)
  																													break
  															splits.append(datasets.SplitGenerator(name=UpperCamelCase_				,    gen_kwargs={"""files""": files}							)							)
  								return splits
  
  
  
  
  
  	def     A				(  self				,    UpperCamelCase_							)		->			pa.Table:
  								"""simple docstring"""
  
  
  
  
  
  
  								if self.info.features is not None:
  															# more expensive cast to support nested features with keys in a different order
  															# allows str <-> int/float or str to Audio for example
  															a_       :   int			=	table_cast(UpperCamelCase_				,    self.info.features.arrow_schema							)
  								return pa_table
  
  
  
  
  
  	def     A				(  self				,    UpperCamelCase_							)		->			Optional[Any]:
  								"""simple docstring"""
  
  
  
  
  
  
  								for file_idx, file in enumerate(itertools.chain.from_iterable(UpperCamelCase_							)							):
  															with open(UpperCamelCase_				,    """rb"""							) as f:
  																						try:
  																													for batch_idx, record_batch in enumerate(pa.ipc.open_stream(UpperCamelCase_							)							):
  																																				a_       :   Tuple			=	pa.Table.from_batches([record_batch]							)
  																																				# Uncomment for debugging (will print the Arrow table size and elements)
  																																				# logger.warning(f"pa_table: {pa_table} num rows: {pa_table.num_rows}")
  																																				# logger.warning('\n'.join(str(pa_table.slice(i, 1).to_pydict()) for i in range(pa_table.num_rows)))
  																																				yield f"""{file_idx}_{batch_idx}""", self._cast_table(UpperCamelCase_							)
  																						except ValueError as e:
  																													logger.error(f"""Failed to read file '{file}' with error {type(UpperCamelCase_							)}: {e}"""							)
  																													raise
  
  
  