

'''simple docstring'''

import itertools
from dataclasses import dataclass
from io import StringIO
from typing import Optional

import pyarrow as pa

import datasets
from datasets.features.features import require_storage_cast
from datasets.table import table_cast


lowerCAmelCase_     =      datasets.utils.logging.get_logger(__name__)







@dataclass
class lowerCamelCase   (    datasets.BuilderConfig				):
				snake_case_							     = None
				snake_case_							     = "utf-8"
				snake_case_							     = None
				snake_case_							     = 10 << 20  # 10MB
				snake_case_							     = False
				snake_case_							     = "line"







class lowerCamelCase   (    datasets.ArrowBasedBuilder				):
				snake_case_							     = TextConfig

				def 					_lowerCamelCase    (       self )    ->							Dict:
					return datasets.DatasetInfo(features=self.config.features )

				def 					_lowerCamelCase    (       self,						lowercase_ )    ->							Tuple:
					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}''' )
					snake_case							=					dl_manager.download_and_extract(self.config.data_files )
					if isinstance(lowercase_,						(str, list, tuple) ):
						snake_case							=					data_files
						if isinstance(lowercase_,						lowercase_ ):
							snake_case							=					[files]
						snake_case							=					[dl_manager.iter_files(lowercase_ ) for file in files]
						return [datasets.SplitGenerator(name=datasets.Split.TRAIN,						gen_kwargs={'files': files} )]
					snake_case							=					[]
					for split_name, files in data_files.items():
						if isinstance(lowercase_,						lowercase_ ):
							snake_case							=					[files]
						snake_case							=					[dl_manager.iter_files(lowercase_ ) for file in files]
						splits.append(datasets.SplitGenerator(name=lowercase_,						gen_kwargs={'files': files} ) )
					return splits

				def 					_lowerCamelCase    (       self,						lowercase_ )    ->							pa.Table:
					if self.config.features is not None:
						snake_case							=					self.config.features.arrow_schema
						if all(not require_storage_cast(lowercase_ ) for feature in self.config.features.values() ):
							# cheaper cast
							snake_case							=					pa_table.cast(lowercase_ )
						else:
							# more expensive cast; allows str <-> int/float or str to Audio for example
							snake_case							=					table_cast(lowercase_,						lowercase_ )
						return pa_table
					else:
						return pa_table.cast(pa.schema({'text': pa.string()} ) )






				def 					_lowerCamelCase    (       self,						lowercase_ )    ->							Union[str, Any]:
					snake_case							=					list(self.config.features ) if self.config.features is not None else ['text']
					for file_idx, file in enumerate(itertools.chain.from_iterable(lowercase_ ) ):
						# open in text mode, by default translates universal newlines ("\n", "\r\n" and "\r") into "\n"
						with open(lowercase_,						encoding=self.config.encoding,						errors=self.config.errors ) as f:
							if self.config.sample_by == "line":
								snake_case							=					0
								while True:
									snake_case							=					f.read(self.config.chunksize )
									if not batch:
										break
									batch += f.readline()  # finish current line
									# StringIO.readlines, by default splits only on "\n" (and keeps line breaks)
									snake_case							=					StringIO(lowercase_ ).readlines()
									if not self.config.keep_linebreaks:
										snake_case							=					[line.rstrip('\n' ) for line in batch]
									snake_case							=					pa.Table.from_arrays([pa.array(lowercase_ )],						names=lowercase_ )
									# 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 (file_idx, batch_idx), self._cast_table(lowercase_ )
									batch_idx += 1
							elif self.config.sample_by == "paragraph":
								snake_case							=					0
								snake_case							=					''
								while True:
									snake_case							=					f.read(self.config.chunksize )
									if not new_batch:
										break
									batch += new_batch
									batch += f.readline()  # finish current line
									snake_case							=					batch.split('\n\n' )
									snake_case							=					pa.Table.from_arrays(
									    [pa.array([example for example in batch[:-1] if example] )],						names=lowercase_ )
									# 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 (file_idx, batch_idx), self._cast_table(lowercase_ )
									batch_idx += 1
									snake_case							=					batch[-1]
								if batch:
									snake_case							=					pa.Table.from_arrays([pa.array([batch] )],						names=lowercase_ )
									yield (file_idx, batch_idx), self._cast_table(lowercase_ )
							elif self.config.sample_by == "document":
								snake_case							=					f.read()
								snake_case							=					pa.Table.from_arrays([pa.array([text] )],						names=lowercase_ )
								yield file_idx, self._cast_table(lowercase_ )







'''simple docstring'''





class 			UpperCamelCase__	:






 def __init__(      self	:Optional[Any]						,					_A	:Tuple      )					->      Tuple:







       '''simple docstring'''



       __A													=      data
       __A													=      None
       __A													=      None






 def __str__(      self	:List[str]      )					->      Optional[int]:







       '''simple docstring'''



       return F'{self.data}'


class 			UpperCamelCase__	:






 def __init__(      self	:List[Any]      )					->      Any:







       '''simple docstring'''



       __A													=      None
       __A													=      None






 def __iter__(      self	:Optional[int]      )					->      List[Any]:







       '''simple docstring'''



       __A													=      self.head
       while node:
             yield node.data
             __A													=      node.next






 def __str__(      self	:Dict      )					->      Union[str, Any]:







       '''simple docstring'''



       return "->".join([str(_A      ) for item in self]      )






 def __len__(      self	:int      )					->      List[str]:







       '''simple docstring'''



       return sum(1 for _ in self      )






 def 						lowercase_    (      self	:List[str]						,					_A	:Any      )					->      str:







       '''simple docstring'''



       self.insert_at_nth(0						,					_A      )






 def 						lowercase_    (      self	:Dict						,					_A	:Optional[Any]      )					->      Tuple:







       '''simple docstring'''



       self.insert_at_nth(len(self      )						,					_A      )






 def 						lowercase_    (      self	:Optional[int]						,					_A	:int						,					_A	:Optional[int]      )					->      int:







       '''simple docstring'''



       __A													=      len(self      )

       if not 0 <= index <= length:
             raise IndexError('list index out of range'      )
       __A													=      Node(_A      )
       if self.head is None:
             __A													=      __A													=      new_node
       elif index == 0:
             __A													=      new_node
             __A													=      self.head
             __A													=      new_node
       elif index == length:
             __A													=      new_node
             __A													=      self.tail
             __A													=      new_node
       else:
             __A													=      self.head
             for _ in range(0						,					_A      ):
                   __A													=      temp.next
             __A													=      new_node
             __A													=      temp.previous
             __A													=      temp
             __A													=      new_node






 def 						lowercase_    (      self	:Optional[int]      )					->      List[str]:







       '''simple docstring'''



       return self.delete_at_nth(0      )






 def 						lowercase_    (      self	:Any      )					->      Tuple:







       '''simple docstring'''



       return self.delete_at_nth(len(self      ) - 1      )






 def 						lowercase_    (      self	:Dict						,					_A	:int      )					->      List[str]:







       '''simple docstring'''



       __A													=      len(self      )

       if not 0 <= index <= length - 1:
             raise IndexError('list index out of range'      )
       __A													=      self.head  # default first node
       if length == 1:
             __A													=      __A													=      None
       elif index == 0:
             __A													=      self.head.next
             __A													=      None
       elif index == length - 1:
             __A													=      self.tail
             __A													=      self.tail.previous
             __A													=      None
       else:
             __A													=      self.head
             for _ in range(0						,					_A      ):
                   __A													=      temp.next
             __A													=      temp
             __A													=      temp.previous
             __A													=      temp.next
       return delete_node.data






 def 						lowercase_    (      self	:List[str]						,					_A	:Dict      )					->      str:







       '''simple docstring'''



       __A													=      self.head

       while current.data != data:  # Find the position to delete
             if current.next:
                   __A													=      current.next
             else:  # We have reached the end an no value matches
                   raise ValueError('No data matching given value'      )

       if current == self.head:
             self.delete_head()

       elif current == self.tail:
             self.delete_tail()

       else:  # Before: 1 <--> 2(current) <--> 3
             __A													=      current.next  # 1 --> 3
             __A													=      current.previous  # 1 <--> 3
       return data






 def 						lowercase_    (      self	:List[str]      )					->      Tuple:







       '''simple docstring'''



       return len(self      ) == 0





def 							snake_case				(		)->      None:







      """simple docstring"""
      __A													=      DoublyLinkedList()
      assert linked_list.is_empty() is True
      assert str(UpperCAmelCase						) == ""

      try:
            linked_list.delete_head()
            raise AssertionError  # This should not happen.
      except IndexError:
            assert True  # This should happen.

      try:
            linked_list.delete_tail()
            raise AssertionError  # This should not happen.
      except IndexError:
            assert True  # This should happen.

      for i in range(1_0						):
            assert len(UpperCAmelCase						) == i
            linked_list.insert_at_nth(UpperCAmelCase   ,	i + 1						)
      assert str(UpperCAmelCase						) == "->".join(str(UpperCAmelCase						) for i in range(1   ,	1_1						)						)

      linked_list.insert_at_head(0						)
      linked_list.insert_at_tail(1_1						)
      assert str(UpperCAmelCase						) == "->".join(str(UpperCAmelCase						) for i in range(0   ,	1_2						)						)

      assert linked_list.delete_head() == 0
      assert linked_list.delete_at_nth(9						) == 1_0
      assert linked_list.delete_tail() == 1_1
      assert len(UpperCAmelCase						) == 9
      assert str(UpperCAmelCase						) == "->".join(str(UpperCAmelCase						) for i in range(1   ,	1_0						)						)


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

 testmod()






