


'''simple docstring'''

from __future__ import annotations

from collections.abc import Iterator
from typing import Any





class      snake_case    :





  """simple docstring"""




  def __init__(    self			,  UpperCamelCase     ):







   """simple docstring"""
   lowerCamelCase_      =  data
   lowerCamelCase_      =  None





class      snake_case    :





  """simple docstring"""




  def __init__(    self     ):







   """simple docstring"""
   lowerCamelCase_      =  None
   lowerCamelCase_      =  None






  def __iter__(    self     ):







   """simple docstring"""
   lowerCamelCase_      =  self.head
   while self.head:
    yield node.data
    lowerCamelCase_      =  node.next
    if node == self.head:
     break






  def __len__(    self     ):







   """simple docstring"""
   return sum(1 for _ in self     )






  def __repr__(    self     ):







   """simple docstring"""
   return "->".join(str(UpperCamelCase     ) for item in iter(self     )     )






  def   snake_case		(    self			,  UpperCamelCase     ):







   """simple docstring"""
   self.insert_nth(len(self     )			,  UpperCamelCase     )






  def   snake_case		(    self			,  UpperCamelCase     ):







   """simple docstring"""
   self.insert_nth(0			,  UpperCamelCase     )






  def   snake_case		(    self			,  UpperCamelCase			,  UpperCamelCase     ):







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






  def   snake_case		(    self     ):







   """simple docstring"""
   return self.delete_nth(0     )






  def   snake_case		(    self     ):







   """simple docstring"""
   return self.delete_nth(len(self     ) - 1     )






  def   snake_case		(    self			,  UpperCamelCase = 0     ):







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







  def   snake_case		(    self     ):







   """simple docstring"""
   return len(self     ) == 0





def __snake_case					(      ):
 lowerCamelCase_      =  CircularLinkedList()
 assert len(UpperCAmelCase_		) == 0
 assert circular_linked_list.is_empty() is True
 assert str(UpperCAmelCase_		) == ""

 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(UpperCAmelCase_		) == i
  circular_linked_list.insert_nth(UpperCAmelCase_					,				i + 1		)
 assert str(UpperCAmelCase_		) == "->".join(str(UpperCAmelCase_		) for i in range(1					,				6		)		)

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

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

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

 assert circular_linked_list.is_empty() is False


if __name__ == "__main__":
     import doctest

     doctest.testmod()




"""simple docstring"""






from ..utils import DummyObject, requires_backends





class  _A						(       metaclass=lowerCAmelCase	):
      snake_case__			:   str							  =	['torch', 'transformers', 'onnx']

      def __init__(						self		,       *__lowerCAmelCase		,       **__lowerCAmelCase						):







            """simple docstring"""



            requires_backends(self		,       ["""torch""", """transformers""", """onnx"""]						)

      @classmethod
      def 				A__       (						cls		,       *__lowerCAmelCase		,       **__lowerCAmelCase						):







            """simple docstring"""



            requires_backends(cls		,       ["""torch""", """transformers""", """onnx"""]						)







      @classmethod
      def 				A__       (						cls		,       *__lowerCAmelCase		,       **__lowerCAmelCase						):







            """simple docstring"""



            requires_backends(cls		,       ["""torch""", """transformers""", """onnx"""]						)






class  _A						(       metaclass=lowerCAmelCase	):
      snake_case__			:   List[Any]							  =	['torch', 'transformers', 'onnx']

      def __init__(						self		,       *__lowerCAmelCase		,       **__lowerCAmelCase						):







            """simple docstring"""



            requires_backends(self		,       ["""torch""", """transformers""", """onnx"""]						)

      @classmethod
      def 				A__       (						cls		,       *__lowerCAmelCase		,       **__lowerCAmelCase						):







            """simple docstring"""



            requires_backends(cls		,       ["""torch""", """transformers""", """onnx"""]						)







      @classmethod
      def 				A__       (						cls		,       *__lowerCAmelCase		,       **__lowerCAmelCase						):







            """simple docstring"""



            requires_backends(cls		,       ["""torch""", """transformers""", """onnx"""]						)






class  _A						(       metaclass=lowerCAmelCase	):
      snake_case__			:   Optional[Any]							  =	['torch', 'transformers', 'onnx']

      def __init__(						self		,       *__lowerCAmelCase		,       **__lowerCAmelCase						):







            """simple docstring"""



            requires_backends(self		,       ["""torch""", """transformers""", """onnx"""]						)

      @classmethod
      def 				A__       (						cls		,       *__lowerCAmelCase		,       **__lowerCAmelCase						):







            """simple docstring"""



            requires_backends(cls		,       ["""torch""", """transformers""", """onnx"""]						)







      @classmethod
      def 				A__       (						cls		,       *__lowerCAmelCase		,       **__lowerCAmelCase						):







            """simple docstring"""



            requires_backends(cls		,       ["""torch""", """transformers""", """onnx"""]						)






class  _A						(       metaclass=lowerCAmelCase	):
      snake_case__			:   int							  =	['torch', 'transformers', 'onnx']

      def __init__(						self		,       *__lowerCAmelCase		,       **__lowerCAmelCase						):







            """simple docstring"""



            requires_backends(self		,       ["""torch""", """transformers""", """onnx"""]						)

      @classmethod
      def 				A__       (						cls		,       *__lowerCAmelCase		,       **__lowerCAmelCase						):







            """simple docstring"""



            requires_backends(cls		,       ["""torch""", """transformers""", """onnx"""]						)







      @classmethod
      def 				A__       (						cls		,       *__lowerCAmelCase		,       **__lowerCAmelCase						):







            """simple docstring"""



            requires_backends(cls		,       ["""torch""", """transformers""", """onnx"""]						)






class  _A						(       metaclass=lowerCAmelCase	):
      snake_case__			:   List[str]							  =	['torch', 'transformers', 'onnx']

      def __init__(						self		,       *__lowerCAmelCase		,       **__lowerCAmelCase						):







            """simple docstring"""



            requires_backends(self		,       ["""torch""", """transformers""", """onnx"""]						)

      @classmethod
      def 				A__       (						cls		,       *__lowerCAmelCase		,       **__lowerCAmelCase						):







            """simple docstring"""



            requires_backends(cls		,       ["""torch""", """transformers""", """onnx"""]						)







      @classmethod
      def 				A__       (						cls		,       *__lowerCAmelCase		,       **__lowerCAmelCase						):







            """simple docstring"""



            requires_backends(cls		,       ["""torch""", """transformers""", """onnx"""]						)






class  _A						(       metaclass=lowerCAmelCase	):
      snake_case__			:   Optional[Any]							  =	['torch', 'transformers', 'onnx']

      def __init__(						self		,       *__lowerCAmelCase		,       **__lowerCAmelCase						):







            """simple docstring"""



            requires_backends(self		,       ["""torch""", """transformers""", """onnx"""]						)

      @classmethod
      def 				A__       (						cls		,       *__lowerCAmelCase		,       **__lowerCAmelCase						):







            """simple docstring"""



            requires_backends(cls		,       ["""torch""", """transformers""", """onnx"""]						)







      @classmethod
      def 				A__       (						cls		,       *__lowerCAmelCase		,       **__lowerCAmelCase						):







            """simple docstring"""



            requires_backends(cls		,       ["""torch""", """transformers""", """onnx"""]						)



