


"""simple docstring"""






from typing import Any
class        _lowercase					:







     def __init__(      self ,						UpperCamelCase_       ):
      __magic_name__     =      data
      __magic_name__     =      None







     def __repr__(      self       ):
      return f'''Node({self.data})'''


class        _lowercase					:







     def __init__(      self       ):
      __magic_name__     =      None







     def __iter__(      self       ):
      __magic_name__     =      self.head
      while node:
       yield node.data
       __magic_name__     =      node.next







     def __len__(      self       ):
      return sum(1 for _ in self       )







     def __repr__(      self       ):
      return "->".join([str(__A       ) for item in self]       )







     def __getitem__(      self ,						UpperCamelCase_       ):
      if not 0 <= index < len(self       ):
       raise ValueError('''list index out of range.'''       )
      for i, node in enumerate(self       ):
       if i == index:
        return node
      return None







     def __setitem__(      self ,						UpperCamelCase_ ,						UpperCamelCase_       ):
      if not 0 <= index < len(self       ):
       raise ValueError('''list index out of range.'''       )
      __magic_name__     =      self.head
      for _ in range(__A       ):
       __magic_name__     =      current.next
      __magic_name__     =      data







     def 	lowerCAmelCase__    (      self ,						UpperCamelCase_       ):
      self.insert_nth(len(self       ) ,						__A       )







     def 	lowerCAmelCase__    (      self ,						UpperCamelCase_       ):
      self.insert_nth(0 ,						__A       )







     def 	lowerCAmelCase__    (      self ,						UpperCamelCase_ ,						UpperCamelCase_       ):
      if not 0 <= index <= len(self       ):
       raise IndexError('''list index out of range'''       )
      __magic_name__     =      Node(__A       )
      if self.head is None:
       __magic_name__     =      new_node
      elif index == 0:
       __magic_name__     =      self.head  # link new_node to head
       __magic_name__     =      new_node
      else:
       __magic_name__     =      self.head
       for _ in range(index - 1       ):
        __magic_name__     =      temp.next
       __magic_name__     =      temp.next
       __magic_name__     =      new_node







     def 	lowerCAmelCase__    (      self       ):  # print every node data
      print(self       )







     def 	lowerCAmelCase__    (      self       ):
      return self.delete_nth(0       )







     def 	lowerCAmelCase__    (      self       ):  # delete from tail
      return self.delete_nth(len(self       ) - 1       )







     def 	lowerCAmelCase__    (      self ,						UpperCamelCase_ = 0       ):
      if not 0 <= index <= len(self       ) - 1:  # test if index is valid
       raise IndexError('''List index out of range.'''       )
      __magic_name__     =      self.head  # default first node
      if index == 0:
       __magic_name__     =      self.head.next
      else:
       __magic_name__     =      self.head
       for _ in range(index - 1       ):
        __magic_name__     =      temp.next
       __magic_name__     =      temp.next
       __magic_name__     =      temp.next.next
      return delete_node.data







     def 	lowerCAmelCase__    (      self       ):
      return self.head is None







     def 	lowerCAmelCase__    (      self       ):
      __magic_name__     =      None
      __magic_name__     =      self.head

      while current:
       # Store the current node's next node.
       __magic_name__     =      current.next
       # Make the current node's next point backwards
       __magic_name__     =      prev
       # Make the previous node be the current node
       __magic_name__     =      current
       # Make the current node the next node (to progress iteration)
       __magic_name__     =      next_node
      # Return prev in order to put the head at the end
      __magic_name__     =      prev





def 	lowercase      (   ) ->      List[str]:
 __magic_name__     =      LinkedList()
 assert linked_list.is_empty() is True
 assert str(_lowerCAmelCase						) == ""

 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(10						):
  assert len(_lowerCAmelCase						) == i
  linked_list.insert_nth(_lowerCAmelCase      ,   i + 1						)
 assert str(_lowerCAmelCase						) == "->".join(str(_lowerCAmelCase						) for i in range(1      ,   11						)						)

 linked_list.insert_head(0						)
 linked_list.insert_tail(11						)
 assert str(_lowerCAmelCase						) == "->".join(str(_lowerCAmelCase						) for i in range(0      ,   12						)						)

 assert linked_list.delete_head() == 0
 assert linked_list.delete_nth(9						) == 10
 assert linked_list.delete_tail() == 11
 assert len(_lowerCAmelCase						) == 9
 assert str(_lowerCAmelCase						) == "->".join(str(_lowerCAmelCase						) for i in range(1      ,   10						)						)

 assert all(linked_list[i] == i + 1 for i in range(0      ,   9						)						) is True

 for i in range(0      ,   9						):
  __magic_name__     =      -i
 assert all(linked_list[i] == -i for i in range(0      ,   9						)						) is True

 linked_list.reverse()
 assert str(_lowerCAmelCase						) == "->".join(str(_lowerCAmelCase						) for i in range(-8      ,   1						)						)





def 	lowercase      (   ) ->      int:
 __magic_name__     =      [
     -9,
     100,
     Node(77345112						),
     "dlrow olleH",
     7,
     5555,
     0,
     -192.55555,
     "Hello, world!",
     77.9,
     Node(10						),
     None,
     None,
     12.20,
 ]
 __magic_name__     =      LinkedList()

 for i in test_input:
  linked_list.insert_tail(_lowerCAmelCase						)

 # Check if it's empty or not
 assert linked_list.is_empty() is False
 assert (
     str(_lowerCAmelCase						) == "-9->100->Node(77345112)->dlrow olleH->7->5555->0->"
     "-192.55555->Hello, world!->77.9->Node(10)->None->None->12.2"
 )

 # Delete the head
 __magic_name__     =      linked_list.delete_head()
 assert result == -9
 assert (
     str(_lowerCAmelCase						) == "100->Node(77345112)->dlrow olleH->7->5555->0->-192.55555->"
     "Hello, world!->77.9->Node(10)->None->None->12.2"
 )

 # Delete the tail
 __magic_name__     =      linked_list.delete_tail()
 assert result == 12.2
 assert (
     str(_lowerCAmelCase						) == "100->Node(77345112)->dlrow olleH->7->5555->0->-192.55555->"
     "Hello, world!->77.9->Node(10)->None->None"
 )

 # Delete a node in specific location in linked list
 __magic_name__     =      linked_list.delete_nth(10						)
 assert result is None
 assert (
     str(_lowerCAmelCase						) == "100->Node(77345112)->dlrow olleH->7->5555->0->-192.55555->"
     "Hello, world!->77.9->Node(10)->None"
 )

 # Add a Node instance to its head
 linked_list.insert_head(Node('''Hello again, world!'''						)						)
 assert (
     str(_lowerCAmelCase						)
     == "Node(Hello again, world!)->100->Node(77345112)->dlrow olleH->"
     "7->5555->0->-192.55555->Hello, world!->77.9->Node(10)->None"
 )

 # Add None to its tail
 linked_list.insert_tail(_lowerCAmelCase						)
 assert (
     str(_lowerCAmelCase						)
     == "Node(Hello again, world!)->100->Node(77345112)->dlrow olleH->"
     "7->5555->0->-192.55555->Hello, world!->77.9->Node(10)->None->None"
 )

 # Reverse the linked list
 linked_list.reverse()
 assert (
     str(_lowerCAmelCase						)
     == "None->None->Node(10)->77.9->Hello, world!->-192.55555->0->5555->"
     "7->dlrow olleH->Node(77345112)->100->Node(Hello again, world!)"
 )





def 	lowercase      (   ) ->      List[Any]:
 from doctest import testmod

 testmod()

 __magic_name__     =      LinkedList()
 linked_list.insert_head(input('''Inserting 1st at head '''						).strip()						)
 linked_list.insert_head(input('''Inserting 2nd at head '''						).strip()						)
 print('''\nPrint list:'''						)
 linked_list.print_list()
 linked_list.insert_tail(input('''\nInserting 1st at tail '''						).strip()						)
 linked_list.insert_tail(input('''Inserting 2nd at tail '''						).strip()						)
 print('''\nPrint list:'''						)
 linked_list.print_list()
 print('''\nDelete head'''						)
 linked_list.delete_head()
 print('''Delete tail'''						)
 linked_list.delete_tail()
 print('''\nPrint list:'''						)
 linked_list.print_list()
 print('''\nReverse linked list'''						)
 linked_list.reverse()
 print('''\nPrint list:'''						)
 linked_list.print_list()
 print('''\nString representation of linked list:'''						)
 print(_lowerCAmelCase						)
 print('''\nReading/changing Node data using indexing:'''						)
 print(f'''Element at Position 1: {linked_list[1]}'''						)
 __magic_name__     =      input('''Enter New Value: '''						).strip()
 print('''New list:'''						)
 print(_lowerCAmelCase						)
 print(f'''length of linked_list is : {len(_lowerCAmelCase						)}'''						)


if __name__ == "__main__":
 main()




"""simple docstring"""






import os
from tempfile import TemporaryDirectory
from unittest import TestCase

import pytest
from absl.testing import parameterized

from datasets import config
from datasets.arrow_reader import HF_GCP_BASE_URL
from datasets.builder import DatasetBuilder
from datasets.dataset_dict import IterableDatasetDict
from datasets.iterable_dataset import IterableDataset
from datasets.load import dataset_module_factory, import_main_class
from datasets.utils.file_utils import cached_path


__lowerCamelCase										=		[
    {"dataset": "wikipedia", "config_name": "20220301.de"},
    {"dataset": "wikipedia", "config_name": "20220301.en"},
    {"dataset": "wikipedia", "config_name": "20220301.fr"},
    {"dataset": "wikipedia", "config_name": "20220301.frr"},
    {"dataset": "wikipedia", "config_name": "20220301.it"},
    {"dataset": "wikipedia", "config_name": "20220301.simple"},
    {"dataset": "snli", "config_name": "plain_text"},
    {"dataset": "eli5", "config_name": "LFQA_reddit"},
    {"dataset": "wiki40b", "config_name": "en"},
    {"dataset": "wiki_dpr", "config_name": "psgs_w100.nq.compressed"},
    {"dataset": "wiki_dpr", "config_name": "psgs_w100.nq.no_index"},
    {"dataset": "wiki_dpr", "config_name": "psgs_w100.multiset.no_index"},
    {"dataset": "natural_questions", "config_name": "default"},
]





def 	lowercase      (   __UpperCamelCase=True						) ->      List[Any]:
 if with_config:
  return [
      {
          "testcase_name": d["dataset"] + "/" + d["config_name"],
          "dataset": d["dataset"],
          "config_name": d["config_name"],
      }
      for d in DATASETS_ON_HF_GCP
  ]
 else:
  return [
      {"testcase_name": dataset, "dataset": dataset} for dataset in {d["dataset"] for d in DATASETS_ON_HF_GCP}
  ]
@parameterized.named_parameters(list_datasets_on_hf_gcp_parameters(with_config=__UpperCAmelCase     )     )
class        _lowercase					(     __UpperCAmelCase     ):
     _lowerCamelCase     =       None
     _lowerCamelCase     =       None







     def 	lowerCAmelCase__    (      self ,						UpperCamelCase_ ,						UpperCamelCase_       ):
      with TemporaryDirectory() as tmp_dir:
       __magic_name__     =      dataset_module_factory(UpperCamelCase_ ,						cache_dir=UpperCamelCase_       )

       __magic_name__     =      import_main_class(dataset_module.module_path ,						dataset=UpperCamelCase_       )

       __magic_name__     =      builder_cls(
           cache_dir=UpperCamelCase_ ,						config_name=UpperCamelCase_ ,						hash=dataset_module.hash ,						)

       __magic_name__     =      '''/'''.join(
           [
               HF_GCP_BASE_URL,
               builder_instance._relative_data_dir(with_hash=UpperCamelCase_       ).replace(os.sep ,						'''/'''       ),
               config.DATASET_INFO_FILENAME,
           ]       )
       __magic_name__     =      cached_path(UpperCamelCase_ ,						cache_dir=UpperCamelCase_       )
       self.assertTrue(os.path.exists(UpperCamelCase_       )       )





@pytest.mark.integration
def 	lowercase      (   __UpperCamelCase						) ->      Tuple:
 __magic_name__     =      tmp_path_factory.mktemp('''test_hf_gcp'''						) / '''test_wikipedia_simple'''
 __magic_name__     =      dataset_module_factory('''wikipedia'''      ,   cache_dir=__UpperCamelCase						)
 __magic_name__     =      import_main_class(dataset_module.module_path						)
 __magic_name__     =      builder_cls(
     cache_dir=__UpperCamelCase      ,   config_name='''20220301.frr'''      ,   hash=dataset_module.hash      ,   )
 # use the HF cloud storage, not the original download_and_prepare that uses apache-beam
 __magic_name__     =      None
 builder_instance.download_and_prepare()
 __magic_name__     =      builder_instance.as_dataset()
 assert ds





@pytest.mark.integration
def 	lowercase      (   __UpperCamelCase						) ->      Tuple:
 __magic_name__     =      dataset_module_factory('''wikipedia'''      ,   cache_dir=__UpperCamelCase						)
 __magic_name__     =      import_main_class(dataset_module.module_path      ,   dataset=__UpperCamelCase						)
 __magic_name__     =      builder_cls(
     cache_dir=__UpperCamelCase      ,   config_name='''20220301.frr'''      ,   hash=dataset_module.hash      ,   )
 __magic_name__     =      builder_instance.as_streaming_dataset()
 assert ds
 assert isinstance(__UpperCamelCase      ,   __UpperCamelCase						)
 assert "train" in ds
 assert isinstance(ds['''train''']      ,   __UpperCamelCase						)
 assert next(iter(ds['''train''']						)						)

