


from typing import Any



class 							A   :
					'''simple docstring'''






					def __init__(self   :						Dict				, _UpperCAmelCase   :						Dict		)						->       Dict:




							"""simple docstring"""


							lowercase__					      =		data
							lowercase__					      =		None


					def __repr__(self   :						List[Any]		)						->       str:




							"""simple docstring"""


							return f'''Node({self.data})'''






class 							A   :
					'''simple docstring'''






					def __init__(self   :						int		)						->       Tuple:




							"""simple docstring"""


							lowercase__					      =		None

					def __iter__(self   :						Dict		)						->       Any:




							"""simple docstring"""


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

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




							"""simple docstring"""


							return sum(1 for _ in self		)

					def __repr__(self   :						Dict		)						->       str:




							"""simple docstring"""


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

					def __getitem__(self   :						Any				, _UpperCAmelCase   :						Union[str, Any]		)						->       Any:




							"""simple docstring"""


							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   :						List[Any]				, _UpperCAmelCase   :						Dict				, _UpperCAmelCase   :						List[Any]		)						->       None:




							"""simple docstring"""


							if not 0 <= index < len(self		):
									raise ValueError("""list index out of range."""		)
							lowercase__					      =		self.head
							for _ in range(_SCREAMING_SNAKE_CASE		):
									lowercase__					      =		current.next
							lowercase__					      =		data

					def   lowerCamelCase__					(self   :						Tuple				, _UpperCAmelCase   :						List[str]		)						->       None:




							"""simple docstring"""


							self.insert_nth(len(self		)				, _SCREAMING_SNAKE_CASE		)

					def   lowerCamelCase__					(self   :						Dict				, _UpperCAmelCase   :						Tuple		)						->       None:




							"""simple docstring"""


							self.insert_nth(0				, _SCREAMING_SNAKE_CASE		)

					def   lowerCamelCase__					(self   :						Dict				, _UpperCAmelCase   :						List[str]				, _UpperCAmelCase   :						Dict		)						->       None:




							"""simple docstring"""


							if not 0 <= index <= len(self		):
									raise IndexError("""list index out of range"""		)
							lowercase__					      =		Node(_SCREAMING_SNAKE_CASE		)
							if self.head is None:
									lowercase__					      =		new_node
							elif index == 0:
									lowercase__					      =		self.head  # link new_node to head
									lowercase__					      =		new_node
							else:
									lowercase__					      =		self.head
									for _ in range(index - 1		):
											lowercase__					      =		temp.next
									lowercase__					      =		temp.next
									lowercase__					      =		new_node

					def   lowerCamelCase__					(self   :						Union[str, Any]		)						->       None:  # print every node data




							"""simple docstring"""


							print(self		)

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




							"""simple docstring"""


							return self.delete_nth(0		)

					def   lowerCamelCase__					(self   :						Tuple		)						->       Any:  # delete from tail




							"""simple docstring"""


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

					def   lowerCamelCase__					(self   :						int				, _UpperCAmelCase   :						List[str] = 0		)						->       Any:




							"""simple docstring"""


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

					def   lowerCamelCase__					(self   :						Tuple		)						->       bool:




							"""simple docstring"""


							return self.head is None


					def   lowerCamelCase__					(self   :						Dict		)						->       None:




							"""simple docstring"""


							lowercase__					      =		None
							lowercase__					      =		self.head

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






def 			UpperCamelCase (     )       ->  Any:
		"""simple docstring"""




		lowercase__					      =		LinkedList()
		assert linked_list.is_empty() is True
		assert str(__magic_name__					) == ""

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

		linked_list.insert_head(0					)
		linked_list.insert_tail(11					)
		assert str(__magic_name__					) == "->".join(str(__magic_name__					) 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(__magic_name__					) == 9
		assert str(__magic_name__					) == "->".join(str(__magic_name__					) 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					):
				lowercase__					      =		-i
		assert all(linked_list[i] == -i for i in range(0   ,   9					)					) is True

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






def 			UpperCamelCase (     )       ->  str:
		"""simple docstring"""




		lowercase__					      =		[
		    -9,
		    100,
		    Node(7734_5112					),
		    """dlrow olleH""",
		    7,
		    5555,
		    0,
		    -1_9_2.5_5_5_5_5,
		    """Hello, world!""",
		    7_7.9,
		    Node(10					),
		    None,
		    None,
		    1_2.2_0,
		]
		lowercase__					      =		LinkedList()

		for i in test_input:
				linked_list.insert_tail(__magic_name__					)

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

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

		# Delete the tail
		lowercase__					      =		linked_list.delete_tail()
		assert result == 1_2.2
		assert (
		    str(__magic_name__					) == "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
		lowercase__					      =		linked_list.delete_nth(10					)
		assert result is None
		assert (
		    str(__magic_name__					) == "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(__magic_name__					)
		    == "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(__magic_name__					)
		assert (
		    str(__magic_name__					)
		    == "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(__magic_name__					)
		    == "None->None->Node(10)->77.9->Hello, world!->-192.55555->0->5555->"
		    "7->dlrow olleH->Node(77345112)->100->Node(Hello again, world!)"
		)






def 			UpperCamelCase (     )       ->  Any:
		"""simple docstring"""




		from doctest import testmod

		testmod()

		lowercase__					      =		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(__magic_name__					)
		print("""\nReading/changing Node data using indexing:"""					)
		print(f'''Element at Position 1: {linked_list[1]}'''					)
		lowercase__					      =		input("""Enter New Value: """					).strip()
		print("""New list:"""					)
		print(__magic_name__					)
		print(f'''length of linked_list is : {len(__magic_name__					)}'''					)


if __name__ == "__main__":
	main()









import pytest


A	:		Optional[Any]    =       '__dummy_dataset1__'

A	:		Tuple    =       '\nimport json\nimport os\n\nimport datasets\n\n\nREPO_URL = "https://huggingface.co/datasets/albertvillanova/tests-raw-jsonl/resolve/main/"\nURLS = {"train": REPO_URL + "wikiann-bn-train.jsonl", "validation": REPO_URL + "wikiann-bn-validation.jsonl"}\n\n\nclass __DummyDataset1__(datasets.GeneratorBasedBuilder):\n\n    def _info(self):\n        features = datasets.Features(\n            {\n                "tokens": datasets.Sequence(datasets.Value("string")),\n                "ner_tags": datasets.Sequence(\n                    datasets.features.ClassLabel(\n                        names=[\n                            "O",\n                            "B-PER",\n                            "I-PER",\n                            "B-ORG",\n                            "I-ORG",\n                            "B-LOC",\n                            "I-LOC",\n                        ]\n                    )\n                ),\n                "langs": datasets.Sequence(datasets.Value("string")),\n                "spans": datasets.Sequence(datasets.Value("string")),\n            }\n        )\n        return datasets.DatasetInfo(features=features)\n\n    def _split_generators(self, dl_manager):\n        dl_path = dl_manager.download(URLS)\n        return [\n            datasets.SplitGenerator(datasets.Split.TRAIN, gen_kwargs={"filepath": dl_path["train"]}),\n            datasets.SplitGenerator(datasets.Split.VALIDATION, gen_kwargs={"filepath": dl_path["validation"]}),\n        ]\n\n    def _generate_examples(self, filepath):\n        with open(filepath, "r", encoding="utf-8") as f:\n            for i, line in enumerate(f):\n                yield i, json.loads(line)\n'






@pytest.fixture
def 			UpperCamelCase (     )       ->  Any:
		"""simple docstring"""




		return DATASET_LOADING_SCRIPT_NAME






@pytest.fixture
def 			UpperCamelCase (     )       ->  Union[str, Any]:
		"""simple docstring"""




		return DATASET_LOADING_SCRIPT_CODE







@pytest.fixture
def 			UpperCamelCase (     __magic_name__					:							List[str]   ,   __magic_name__					:							Dict   ,   __magic_name__					:							Any					)       ->  str:
		"""simple docstring"""




		lowercase__					      =		dataset_loading_script_name
		lowercase__					      =		tmp_path / """datasets""" / script_name
		script_dir.mkdir(parents=__magic_name__					)
		lowercase__					      =		script_dir / f'''{script_name}.py'''
		with open(__magic_name__   ,   """w"""					) as f:
				f.write(__magic_name__					)
		return str(__magic_name__					)

