
from typing import Any







class 			__A:




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


								'''simple docstring'''




								__a										=    data
								__a										=    None




				def __repr__(     self				)    ->      str:


								'''simple docstring'''




								return F"""Node({self.data})"""







class 			__A:




				def __init__(     self				)    ->      Dict:


								'''simple docstring'''




								__a										=    None




				def __iter__(     self				)    ->      Any:


								'''simple docstring'''




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




				def __len__(     self				)    ->      int:


								'''simple docstring'''




								return sum(1 for _ in self				)




				def __repr__(     self				)    ->      str:


								'''simple docstring'''




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




				def __getitem__(     self		,     _snake_case				)    ->      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		,     _snake_case		,     _snake_case				)    ->      None:


								'''simple docstring'''




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




				def 				SCREAMING_SNAKE_CASE_		(     self		,     _snake_case				)    ->      None:


								'''simple docstring'''




								self.insert_nth(len(self				)		,     _snake_case				)




				def 				SCREAMING_SNAKE_CASE_		(     self		,     _snake_case				)    ->      None:


								'''simple docstring'''




								self.insert_nth(0		,     _snake_case				)




				def 				SCREAMING_SNAKE_CASE_		(     self		,     _snake_case		,     _snake_case				)    ->      None:


								'''simple docstring'''




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




				def 				SCREAMING_SNAKE_CASE_		(     self				)    ->      None:  # print every node data


								'''simple docstring'''




								print(self				)




				def 				SCREAMING_SNAKE_CASE_		(     self				)    ->      Any:


								'''simple docstring'''




								return self.delete_nth(0				)




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


								'''simple docstring'''




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




				def 				SCREAMING_SNAKE_CASE_		(     self		,     _snake_case = 0				)    ->      Any:


								'''simple docstring'''




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




				def 				SCREAMING_SNAKE_CASE_		(     self				)    ->      bool:


								'''simple docstring'''




								return self.head is None




				def 				SCREAMING_SNAKE_CASE_		(     self				)    ->      None:


								'''simple docstring'''




								__a										=    None
								__a										=    self.head

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



def     __lowerCAmelCase			(			)       ->  None:
				__a										=    LinkedList()
				assert linked_list.is_empty() is True
				assert str(a__  ) == ""

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

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

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


def     __lowerCAmelCase			(			)       ->  None:
				__a										=    [
				    -9,
				    100,
				    Node(7734_5112  ),
				    '''dlrow olleH''',
				    7,
				    5555,
				    0,
				    -192.55_555,
				    '''Hello, world!''',
				    77.9,
				    Node(10  ),
				    None,
				    None,
				    12.20,
				]
				__a										=    LinkedList()

				for i in test_input:
								linked_list.insert_tail(a__  )

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

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

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


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

				testmod()

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


if __name__ == "__main__":
					main()

# XXX: we want transformers master here - in the absense of conftest manipulating sys.path:
# hack it in for now:
import sys
from pathlib import Path


A     :	Optional[Any]    = Path(__file__).resolve().parents[3] / 'src'
sys.path.insert(1, str(git_repo_path))

import dataclasses  # noqa
import io  # noqa
import itertools  # noqa
import json  # noqa
import os  # noqa
import unittest  # noqa
from copy import deepcopy  # noqa

from parameterized import parameterized  # noqa
from transformers import TrainingArguments, is_torch_available  # noqa
from transformers.deepspeed import is_deepspeed_available  # noqa
from transformers.file_utils import WEIGHTS_NAME  # noqa
from transformers.testing_utils import (  # noqa
    CaptureLogger,
    ExtendSysPath,
    TestCasePlus,
    execute_subprocess_async,
    get_gpu_count,
    mockenv_context,
    require_deepspeed,
    require_torch_gpu,
    require_torch_multi_gpu,
    slow,
)
from transformers.trainer_utils import set_seed  # noqa


set_seed(4_2)

A     :	List[str]    = {'base': 'patrickvonplaten/wav2vec2_tiny_random', 'robust': 'patrickvonplaten/wav2vec2_tiny_random_robust'}

A     :	Optional[int]    = 'zero2'
A     :	str    = 'zero3'
A     :	Tuple    = [ZEROa, ZEROa]


def     __lowerCAmelCase			(			a__						,    a__						,    a__  )       ->  Tuple:
				# customize the test name generator function as we want both params to appear in the sub-test
				# name, as by default it shows only the first param
				__a										=    parameterized.to_safe_name('''_'''.join(str(a__  ) for x in param.args  )  )
				return F"""{func.__name__}_{param_based_name}"""


# Cartesian-product of zero stages with models to test
A     :	Union[str, Any]    = list(itertools.product(stages, models.keys()))







@slow
@require_deepspeed
@require_torch_gpu
class 			__A( a			):




				@parameterized.expand(_snake_case		,     name_func=_snake_case				)
				def 				SCREAMING_SNAKE_CASE_		(     self		,     _snake_case		,     _snake_case				)    ->      Any:


								'''simple docstring'''




								self.run_and_check(
								    stage=_snake_case		,     model=_snake_case		,     distributed=_snake_case		,     fpaa=_snake_case		,     )




				@require_torch_multi_gpu
				@parameterized.expand(_snake_case		,     name_func=_snake_case				)
				def 				SCREAMING_SNAKE_CASE_		(     self		,     _snake_case		,     _snake_case				)    ->      int:


								'''simple docstring'''




								self.run_and_check(
								    stage=_snake_case		,     model=_snake_case		,     distributed=_snake_case		,     fpaa=_snake_case		,     )




				@parameterized.expand(_snake_case		,     name_func=_snake_case				)
				def 				SCREAMING_SNAKE_CASE_		(     self		,     _snake_case		,     _snake_case				)    ->      str:


								'''simple docstring'''




								self.run_and_check(
								    stage=_snake_case		,     model=_snake_case		,     distributed=_snake_case		,     fpaa=_snake_case		,     )




				@require_torch_multi_gpu
				@parameterized.expand(_snake_case		,     name_func=_snake_case				)
				def 				SCREAMING_SNAKE_CASE_		(     self		,     _snake_case		,     _snake_case				)    ->      Optional[Any]:


								'''simple docstring'''




								self.run_and_check(
								    stage=_snake_case		,     model=_snake_case		,     distributed=_snake_case		,     fpaa=_snake_case		,     )




				def 				SCREAMING_SNAKE_CASE_		(     self		,     _snake_case				)    ->      Tuple:


								'''simple docstring'''




								pass




				def 				SCREAMING_SNAKE_CASE_		(     self		,     _snake_case		,     _snake_case		,     _snake_case = 10		,     _snake_case = True		,     _snake_case = True		,     _snake_case = True		,     )    ->      Any:


								'''simple docstring'''




								__a										=    models[model]

								__a										=    self.run_trainer(
								    stage=_snake_case		,     model_name=_snake_case		,     eval_steps=_snake_case		,     num_train_epochs=1		,     distributed=_snake_case		,     fpaa=_snake_case		,     )

								self.do_checks(_snake_case				)

								return output_dir




				def 				SCREAMING_SNAKE_CASE_		(     self		,     _snake_case		,     _snake_case		,     _snake_case = 10		,     _snake_case = 1		,     _snake_case = True		,     _snake_case = True		,     )    ->      Union[str, Any]:


								'''simple docstring'''




								__a										=    self.get_auto_remove_tmp_dir('''./xxx'''		,     after=_snake_case				)
								__a										=    F"""
            --model_name_or_path {model_name}
            --dataset_name hf-internal-testing/librispeech_asr_dummy
            --dataset_config_name clean
            --train_split_name validation
            --validation_split_name validation
            --output_dir {output_dir}
            --num_train_epochs {str(_snake_case				)}
            --per_device_train_batch_size 2
            --per_device_eval_batch_size 2
            --evaluation_strategy steps
            --learning_rate 5e-4
            --warmup_steps 8
            --orthography timit
            --preprocessing_num_workers 1
            --group_by_length
            --freeze_feature_extractor
            --report_to none
            --save_steps 0
            --eval_steps {eval_steps}
            --report_to none
        """.split()

								if fpaa:
												args.extend(['''--fp16''']				)

								# currently ds_config_wav2vec2_zero.json requires "zero_optimization.find_unused_parameters": true,
								# hence the separate config files
								__a										=    F"""--deepspeed {self.test_file_dir_str}/ds_config_wav2vec2_{stage}.json""".split()
								__a										=    [F"""{self.examples_dir_str}/research_projects/wav2vec2/run_asr.py"""]
								__a										=    self.get_launcher(_snake_case				)

								__a										=    launcher + script + args + ds_args
								# keep for quick debug
								# print(" ".join([f"\nPYTHONPATH={self.src_dir_str}"] +cmd)); die
								execute_subprocess_async(_snake_case		,     env=self.get_env()				)

								return output_dir




				def 				SCREAMING_SNAKE_CASE_		(     self		,     _snake_case=False				)    ->      List[str]:


								'''simple docstring'''




								__a										=    min(2		,     get_gpu_count()				) if distributed else 1
								return F"""deepspeed --num_nodes 1 --num_gpus {num_gpus}""".split()