
"""simple docstring"""



import inspect
import os
import unittest

import torch

import accelerate
from accelerate import Accelerator
from accelerate.test_utils import execute_subprocess_async, require_multi_gpu
from accelerate.utils import patch_environment





class 				a			(					unittest.TestCase      ):



      def  __snake_case							(   self      ):
          UpperCAmelCase__	:      Optional[int]     							=					inspect.getfile(accelerate.test_utils      )
          UpperCAmelCase__	:      int     							=					os.path.sep.join(mod_file.split(os.path.sep      )[:-1] + ['scripts', 'test_script.py']      )
          UpperCAmelCase__	:      Any     							=					os.path.sep.join(
              mod_file.split(os.path.sep      )[:-1] + ['scripts', 'test_distributed_data_loop.py']      )
          UpperCAmelCase__	:      Any     							=					os.path.sep.join(mod_file.split(os.path.sep      )[:-1] + ['scripts', 'test_ops.py']      )



      @require_multi_gpu
      def  __snake_case							(   self      ):
          print(F'''Found {torch.cuda.device_count()} devices.'''      )
          UpperCAmelCase__	:      List[str]     							=					['torchrun', F'''--nproc_per_node={torch.cuda.device_count()}''', self.test_file_path]
          with patch_environment(omp_num_threads=1      ):
              execute_subprocess_async(UpperCamelCase_     ,	env=os.environ.copy()      )



      @require_multi_gpu
      def  __snake_case							(   self      ):
          print(F'''Found {torch.cuda.device_count()} devices.'''      )
          UpperCAmelCase__	:      str     							=					['torchrun', F'''--nproc_per_node={torch.cuda.device_count()}''', self.operation_file_path]
          print(F'''Command: {cmd}'''      )
          with patch_environment(omp_num_threads=1      ):
              execute_subprocess_async(UpperCamelCase_     ,	env=os.environ.copy()      )



      @require_multi_gpu
      def  __snake_case							(   self      ):
          UpperCAmelCase__	:      int     							=					['torchrun', F'''--nproc_per_node={torch.cuda.device_count()}''', inspect.getfile(self.__class__      )]
          with patch_environment(omp_num_threads=1      ):
              execute_subprocess_async(UpperCamelCase_     ,	env=os.environ.copy()      )



      @require_multi_gpu
      def  __snake_case							(   self      ):
          print(F'''Found {torch.cuda.device_count()} devices, using 2 devices only'''      )
          UpperCAmelCase__	:      Optional[Any]     							=					['torchrun', F'''--nproc_per_node={torch.cuda.device_count()}''', self.data_loop_file_path]
          with patch_environment(omp_num_threads=1     ,	cuda_visible_devices='0,1'      ):
              execute_subprocess_async(UpperCamelCase_     ,	env=os.environ.copy()      )


if __name__ == "__main__":
    UpperCamelCase__          =	Accelerator()
    UpperCamelCase__          =	(accelerator.state.process_index + 2, 10)
    UpperCamelCase__          =	torch.randint(0, 10, shape).to(accelerator.device)

    UpperCamelCase__          =	''

    UpperCamelCase__          =	accelerator.pad_across_processes(tensor)
    if tensora.shape[0] != accelerator.state.num_processes + 1:
        error_msg += f"Found shape {tensora.shape} but should have {accelerator.state.num_processes + 1} at dim 0."
    if not torch.equal(tensora[: accelerator.state.process_index + 2], tensor):
        error_msg += "Tensors have different values."
    if not torch.all(tensora[accelerator.state.process_index + 2 :] == 0):
        error_msg += "Padding was not done with the right value (0)."

    UpperCamelCase__          =	accelerator.pad_across_processes(tensor, pad_first=True)
    if tensora.shape[0] != accelerator.state.num_processes + 1:
        error_msg += f"Found shape {tensora.shape} but should have {accelerator.state.num_processes + 1} at dim 0."
    UpperCamelCase__          =	accelerator.state.num_processes - accelerator.state.process_index - 1
    if not torch.equal(tensora[index:], tensor):
        error_msg += "Tensors have different values."
    if not torch.all(tensora[:index] == 0):
        error_msg += "Padding was not done with the right value (0)."

    # Raise error at the end to make sure we don't stop at the first failure.
    if len(error_msg) > 0:
        raise ValueError(error_msg)



"""simple docstring"""



from typing import Any





class 				a			:



      def __init__(   self     ,	UpperCamelCase_      ):
          UpperCAmelCase__	:      Optional[Any]     							=					data
          UpperCAmelCase__	:      List[str]     							=					None



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





class 				a			:



      def __init__(   self      ):
          UpperCAmelCase__	:      Any     							=					None



      def __iter__(   self      ):
          UpperCAmelCase__	:      List[str]     							=					self.head
          while node:
              yield node.data
              UpperCAmelCase__	:      Optional[int]     							=					node.next



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



      def __repr__(   self      ):
          return "->".join([str(UpperCamelCase_      ) 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.'      )
          UpperCAmelCase__	:      List[str]     							=					self.head
          for _ in range(UpperCamelCase_      ):
              UpperCAmelCase__	:      Optional[Any]     							=					current.next
          UpperCAmelCase__	:      List[str]     							=					data



      def  __snake_case							(   self     ,	UpperCamelCase_      ):
          self.insert_nth(len(self      )     ,	UpperCamelCase_      )



      def  __snake_case							(   self     ,	UpperCamelCase_      ):
          self.insert_nth(0     ,	UpperCamelCase_      )



      def  __snake_case							(   self     ,	UpperCamelCase_     ,	UpperCamelCase_      ):
          if not 0 <= index <= len(self      ):
              raise IndexError('list index out of range'      )
          UpperCAmelCase__	:      str     							=					Node(UpperCamelCase_      )
          if self.head is None:
              UpperCAmelCase__	:      Tuple     							=					new_node
          elif index == 0:
              UpperCAmelCase__	:      Optional[int]     							=					self.head  # link new_node to head
              UpperCAmelCase__	:      Any     							=					new_node
          else:
              UpperCAmelCase__	:      Dict     							=					self.head
              for _ in range(index - 1      ):
                  UpperCAmelCase__	:      Tuple     							=					temp.next
              UpperCAmelCase__	:      int     							=					temp.next
              UpperCAmelCase__	:      Tuple     							=					new_node



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



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



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



      def  __snake_case							(   self     ,	UpperCamelCase_ = 0      ):
          if not 0 <= index <= len(self      ) - 1:  # test if index is valid
              raise IndexError('List index out of range.'      )
          UpperCAmelCase__	:      Union[str, Any]     							=					self.head  # default first node
          if index == 0:
              UpperCAmelCase__	:      Dict     							=					self.head.next
          else:
              UpperCAmelCase__	:      List[Any]     							=					self.head
              for _ in range(index - 1      ):
                  UpperCAmelCase__	:      Any     							=					temp.next
              UpperCAmelCase__	:      Dict     							=					temp.next
              UpperCAmelCase__	:      Tuple     							=					temp.next.next
          return delete_node.data



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



      def  __snake_case							(   self      ):
          UpperCAmelCase__	:      Optional[Any]     							=					None
          UpperCAmelCase__	:      str     							=					self.head

          while current:
              # Store the current node's next node.
              UpperCAmelCase__	:      Any     							=					current.next
              # Make the current node's next point backwards
              UpperCAmelCase__	:      Optional[int]     							=					prev
              # Make the previous node be the current node
              UpperCAmelCase__	:      List[Any]     							=					current
              # Make the current node the next node (to progress iteration)
              UpperCAmelCase__	:      int     							=					next_node
          # Return prev in order to put the head at the end
          UpperCAmelCase__	:      str     							=					prev




def 					lowerCamelCase   (     ):
    UpperCAmelCase__	:      Dict     							=					LinkedList()
    assert linked_list.is_empty() is True
    assert str(_snake_case ) == ""

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

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

    linked_list.reverse()
    assert str(_snake_case ) == "->".join(str(_snake_case ) for i in range(-8    ,1 ) )
def 					lowerCamelCase   (     ):
    UpperCAmelCase__	:      int     							=					[
        -9,
        100,
        Node(77345112 ),
        'dlrow olleH',
        7,
        5555,
        0,
        -192.55555,
        'Hello, world!',
        77.9,
        Node(10 ),
        None,
        None,
        12.20,
    ]
    UpperCAmelCase__	:      Dict     							=					LinkedList()

    for i in test_input:
        linked_list.insert_tail(_snake_case )

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

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

    # Delete the tail
    UpperCAmelCase__	:      Union[str, Any]     							=					linked_list.delete_tail()
    assert result == 12.2
    assert (
        str(_snake_case ) == "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
    UpperCAmelCase__	:      Dict     							=					linked_list.delete_nth(10 )
    assert result is None
    assert (
        str(_snake_case ) == "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(_snake_case )
        == "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(_snake_case )
    assert (
        str(_snake_case )
        == "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(_snake_case )
        == "None->None->Node(10)->77.9->Hello, world!->-192.55555->0->5555->"
        "7->dlrow olleH->Node(77345112)->100->Node(Hello again, world!)"
    )
def 					lowerCamelCase   (     ):
    from doctest import testmod

    testmod()

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


if __name__ == "__main__":
    main()

