code: 
  '''simple docstring'''
  
  import json
  import os
  import tempfile
  
  import datasets
  from utils import generate_example_dataset, get_duration
  
  
  _UpperCAmelCase   :      Tuple 						=  500000
  
  _UpperCAmelCase						,							_UpperCAmelCase   :      Dict 						=  os.path.split(__file__)
  _UpperCAmelCase   :      Optional[int] 						=  os.path.join(RESULTS_BASEPATH, """results""", RESULTS_FILENAME.replace(""".py""", """.json"""))
  
  
  
  
  
  
  
  @get_duration
  def 						snake_case__	(      UpperCamelCase	) ->      Optional[int]:
  		_UpperCamelCase       : int    =      dataset.select(range(0			,len(UpperCamelCase	)			,2	)	)
  
  
  
  
  
  
  
  @get_duration
  def 						snake_case__	(      UpperCamelCase	) ->      List[Any]:
  		_UpperCamelCase       : Optional[int]    =      dataset.sort('''numbers'''	)
  
  
  
  
  
  
  
  @get_duration
  def 						snake_case__	(      UpperCamelCase	) ->      List[Any]:
  		_UpperCamelCase       : List[Any]    =      dataset.shuffle()
  
  
  
  
  
  
  
  @get_duration
  def 						snake_case__	(      UpperCamelCase	) ->      Any:
  		_UpperCamelCase       : Tuple    =      dataset.train_test_split(0.1	)
  
  
  
  
  
  
  
  @get_duration
  def 						snake_case__	(      UpperCamelCase			,UpperCamelCase=10	) ->      int:
  		for shard_id in range(UpperCamelCase	):
  				_UpperCamelCase       : Any    =      dataset.shard(UpperCamelCase			,UpperCamelCase	)
  
  
  
  
  
  
  
  def 						snake_case__	(      ) ->      Union[str, Any]:
  		_UpperCamelCase       : Optional[int]    =      {'''num examples''': SPEED_TEST_N_EXAMPLES}
  		_UpperCamelCase       : Tuple    =      (select, sort, shuffle, train_test_split, shard)
  		with tempfile.TemporaryDirectory() as tmp_dir:
  				print('''generating dataset'''	)
  				_UpperCamelCase       : List[Any]    =      datasets.Features({'''text''': datasets.Value('''string'''	), '''numbers''': datasets.Value('''float32'''	)}	)
  				_UpperCamelCase       : str    =      generate_example_dataset(
  				    os.path.join(UpperCamelCase			,'''dataset.arrow'''	)			,UpperCamelCase			,num_examples=UpperCamelCase	)
  				print('''Functions'''	)
  				for func in functions:
  						print(func.__name__	)
  						_UpperCamelCase       : List[Any]    =      func(UpperCamelCase	)
  
  		with open(UpperCamelCase			,'''wb'''	) as f:
  				f.write(json.dumps(UpperCamelCase	).encode('''utf-8'''	)	)
  
  
  if __name__ == "__main__":  # useful to run the profiler
  	benchmark_indices_mapping()
  
  
  
  
  
  
style_context: 
  '''simple docstring'''
  
  from __future__ import annotations
  
  from collections.abc import Iterable
  from dataclasses import dataclass
  from typing import Any
  
  class 			UpperCAmelCase				:
  
  
  
  
  
  		"""simple docstring"""
  
  
  
  
  
  		A__  :   List[str]          =    ('_front', '_back', '_len')
  
  		@dataclass
  		class 			UpperCAmelCase				:
  
  
  
  
  
  				"""simple docstring"""
  
  
  
  
  
  				A__  :   Any          =    None
  				A__  :   Deque._Node | None          =    None
  				A__  :   Deque._Node | None          =    None
  
  
  
  
  
  
  
  		class 			UpperCAmelCase				:
  
  
  
  
  
  				"""simple docstring"""
  
  
  
  
  
  				A__  :   Any          =    ('_cur',)
  				def __init__(    self  ,					_snake_case     )				->    None:
  						_UpperCamelCase       : Any    =      cur
  				def __iter__(    self     )				->    Deque._Iterator:
  						return self
  
  
  
  
  				def _lowercase  (    self     )				->    Any:
  						if self._cur is None:
  								# finished iterating
  								raise StopIteration
  						_UpperCamelCase       : List[Any]    =      self._cur.val
  						_UpperCamelCase       : List[Any]    =      self._cur.next_node
  
  						return val
  
  
  
  
  
  
  
  		def __init__(    self  ,					_snake_case = None     )				->    None:
  				_UpperCamelCase       : Any    =      None
  				_UpperCamelCase       : Any    =      None
  				_UpperCamelCase       : int    =      0
  
  				if iterable is not None:
  						# append every value to the deque
  						for val in iterable:
  								self.append(_snake_case     )
  		def _lowercase  (    self  ,					_snake_case     )				->    None:
  				_UpperCamelCase       : List[str]    =      self._Node(_snake_case  ,					_snake_case  ,					_snake_case     )
  				if self.is_empty():
  						# front = back
  						_UpperCamelCase       : Union[str, Any]    =      node
  						_UpperCamelCase       : Tuple    =      1
  				else:
  						# connect nodes
  						_UpperCamelCase       : Union[str, Any]    =      node
  						_UpperCamelCase       : int    =      self._back
  						_UpperCamelCase       : List[Any]    =      node  # assign new back to the new node
  
  						self._len += 1
  
  						# make sure there were no errors
  						assert not self.is_empty(), "Error on appending value."
  		def _lowercase  (    self  ,					_snake_case     )				->    None:
  				_UpperCamelCase       : Optional[Any]    =      self._Node(_snake_case  ,					_snake_case  ,					_snake_case     )
  				if self.is_empty():
  						# front = back
  						_UpperCamelCase       : Union[str, Any]    =      node
  						_UpperCamelCase       : Optional[int]    =      1
  				else:
  						# connect nodes
  						_UpperCamelCase       : Tuple    =      self._front
  						_UpperCamelCase       : Optional[int]    =      node
  						_UpperCamelCase       : List[str]    =      node  # assign new front to the new node
  
  						self._len += 1
  
  						# make sure there were no errors
  						assert not self.is_empty(), "Error on appending value."
  		def _lowercase  (    self  ,					_snake_case     )				->    None:
  				for val in iterable:
  						self.append(_snake_case     )
  		def _lowercase  (    self  ,					_snake_case     )				->    None:
  				for val in iterable:
  						self.appendleft(_snake_case     )
  		def _lowercase  (    self     )				->    Any:
  				assert not self.is_empty(), "Deque is empty."
  
  				_UpperCamelCase       : int    =      self._back
  				_UpperCamelCase       : List[Any]    =      self._back.prev_node  # set new back
  				# drop the last node - python will deallocate memory automatically
  				_UpperCamelCase       : Union[str, Any]    =      None
  
  				self._len -= 1
  
  				return topop.val
  		def _lowercase  (    self     )				->    Any:
  				assert not self.is_empty(), "Deque is empty."
  
  				_UpperCamelCase       : List[Any]    =      self._front
  				_UpperCamelCase       : str    =      self._front.next_node  # set new front and drop the first node
  				_UpperCamelCase       : Union[str, Any]    =      None
  
  				self._len -= 1
  
  				return topop.val
  		def _lowercase  (    self     )				->    bool:
  				return self._front is None
  		def __len__(    self     )				->    int:
  				return self._len
  		def __eq__(    self  ,					_snake_case     )				->    bool:
  
  				if not isinstance(_snake_case  ,					_snake_case     ):
  						return NotImplemented
  
  				_UpperCamelCase       : Optional[int]    =      self._front
  				_UpperCamelCase       : List[Any]    =      other._front
  
  				# if the length of the dequeues are not the same, they are not equal
  				if len(self     ) != len(_snake_case     ):
  						return False
  
  				while me is not None and oth is not None:
  						# compare every value
  						if me.val != oth.val:
  								return False
  						_UpperCamelCase       : str    =      me.next_node
  						_UpperCamelCase       : List[str]    =      oth.next_node
  
  				return True
  		def __iter__(    self     )				->    Deque._Iterator:
  				return Deque._Iterator(self._front     )
  
  
  
  
  		def __repr__(    self     )				->    str:
  				_UpperCamelCase       : str    =      []
  				_UpperCamelCase       : Tuple    =      self._front
  				while aux is not None:
  						# append the values in a list to display
  						values_list.append(aux.val     )
  						_UpperCamelCase       : List[str]    =      aux.next_node
  
  				return F'''[{', '.join(repr(_snake_case     ) for val in values_list     )}]'''
  
  
  if __name__ == "__main__":
  	import doctest
  
  	doctest.testmod()
  
  
  
  
  
  