





from __future__ import annotations

from collections.abc import Iterator
from typing import Any





class  lowerCAmelCase							:







  def __init__(      self  :List[Any]   ,							_lowercase  :Any ):






     '''simple docstring'''





     lowercase__			       =  data
     lowercase__			       =  None





class  lowerCAmelCase							:







  def __init__(      self  :Any ):






     '''simple docstring'''





     lowercase__			       =  None
     lowercase__			       =  None







  def __iter__(      self  :str ):






     '''simple docstring'''





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







  def __len__(      self  :Union[str, Any] ):






     '''simple docstring'''





     return sum(1 for _ in self )







  def __repr__(      self  :Union[str, Any] ):






     '''simple docstring'''





     return "->".join(str(_lowercase ) for item in iter(self ) )







  def   UpperCAmelCase					(      self  :str   ,							_lowercase  :Any ):






     '''simple docstring'''





     self.insert_nth(len(self )   ,							_lowercase )







  def   UpperCAmelCase					(      self  :str   ,							_lowercase  :Any ):






     '''simple docstring'''





     self.insert_nth(0   ,							_lowercase )







  def   UpperCAmelCase					(      self  :str   ,							_lowercase  :int   ,							_lowercase  :Any ):






     '''simple docstring'''





     if index < 0 or index > len(self ):
        raise IndexError("list index out of range." )
     lowercase__			       =  Node(_lowercase )
     if self.head is None:
        lowercase__			       =  new_node  # first node points itself
        lowercase__			       =  lowercase__			       =  new_node
     elif index == 0:  # insert at head
        lowercase__			       =  self.head
        lowercase__			       =  lowercase__			       =  new_node
     else:
        lowercase__			       =  self.head
        for _ in range(index - 1 ):
           lowercase__			       =  temp.next
        lowercase__			       =  temp.next
        lowercase__			       =  new_node
        if index == len(self ) - 1:  # insert at tail
           lowercase__			       =  new_node







  def   UpperCAmelCase					(      self  :str ):






     '''simple docstring'''





     return self.delete_nth(0 )







  def   UpperCAmelCase					(      self  :Optional[Any] ):






     '''simple docstring'''





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







  def   UpperCAmelCase					(      self  :List[str]   ,							_lowercase  :int = 0 ):






     '''simple docstring'''





     if not 0 <= index < len(self ):
        raise IndexError("list index out of range." )
     lowercase__			       =  self.head
     if self.head == self.tail:  # just one node
        lowercase__			       =  lowercase__			       =  None
     elif index == 0:  # delete head node
        lowercase__			       =  self.tail.next.next
        lowercase__			       =  self.head.next
     else:
        lowercase__			       =  self.head
        for _ in range(index - 1 ):
           lowercase__			       =  temp.next
        lowercase__			       =  temp.next
        lowercase__			       =  temp.next.next
        if index == len(self ) - 1:  # delete at tail
           lowercase__			       =  temp
     return delete_node.data







  def   UpperCAmelCase					(      self  :Dict ):






     '''simple docstring'''





     return len(self ) == 0


def _A       (   ):
   lowercase__			       =  CircularLinkedList()
   assert len(__magic_name__	) == 0
   assert circular_linked_list.is_empty() is True
   assert str(__magic_name__	) == ""

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

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

   try:
      circular_linked_list.delete_nth(-1	)
      raise AssertionError
   except IndexError:
      assert True

   try:
      circular_linked_list.delete_nth(0	)
      raise AssertionError
   except IndexError:
      assert True

   assert circular_linked_list.is_empty() is True
   for i in range(5	):
      assert len(__magic_name__	) == i
      circular_linked_list.insert_nth(__magic_name__  , i + 1	)
   assert str(__magic_name__	) == "->".join(str(__magic_name__	) for i in range(1  , 6	)	)

   circular_linked_list.insert_tail(6	)
   assert str(__magic_name__	) == "->".join(str(__magic_name__	) for i in range(1  , 7	)	)
   circular_linked_list.insert_head(0	)
   assert str(__magic_name__	) == "->".join(str(__magic_name__	) for i in range(0  , 7	)	)

   assert circular_linked_list.delete_front() == 0
   assert circular_linked_list.delete_tail() == 6
   assert str(__magic_name__	) == "->".join(str(__magic_name__	) for i in range(1  , 6	)	)
   assert circular_linked_list.delete_nth(2	) == 3

   circular_linked_list.insert_nth(2  , 3	)
   assert str(__magic_name__	) == "->".join(str(__magic_name__	) for i in range(1  , 6	)	)

   assert circular_linked_list.is_empty() is False


if __name__ == "__main__":
  import doctest

  doctest.testmod()













from typing import TYPE_CHECKING

# rely on isort to merge the imports
from ...utils import OptionalDependencyNotAvailable, _LazyModule, is_torch_available


_snake_case           =			{
    """configuration_autoformer""": [
        """AUTOFORMER_PRETRAINED_CONFIG_ARCHIVE_MAP""",
        """AutoformerConfig""",
    ],
}

try:
  if not is_torch_available():
    raise OptionalDependencyNotAvailable()
except OptionalDependencyNotAvailable:
  pass
else:
  _snake_case           =			[
      """AUTOFORMER_PRETRAINED_MODEL_ARCHIVE_LIST""",
      """AutoformerForPrediction""",
      """AutoformerModel""",
      """AutoformerPreTrainedModel""",
  ]


if TYPE_CHECKING:
  from .configuration_autoformer import (
      AUTOFORMER_PRETRAINED_CONFIG_ARCHIVE_MAP,
      AutoformerConfig,
  )

  try:
    if not is_torch_available():
      raise OptionalDependencyNotAvailable()
  except OptionalDependencyNotAvailable:
    pass
  else:
    from .modeling_autoformer import (
        AUTOFORMER_PRETRAINED_MODEL_ARCHIVE_LIST,
        AutoformerForPrediction,
        AutoformerModel,
        AutoformerPreTrainedModel,
    )

else:
  import sys

  _snake_case           =			_LazyModule(__name__, globals()["""__file__"""], _import_structure, module_spec=__spec__)






