



'''simple docstring'''



from __future__ import annotations

from collections.abc import Iterator
from typing import Any
class 							UpperCAmelCase__	:



 def __init__(	self		,						lowercase      )	->				List[Any]:
  __UpperCamelCase					   =	data
  __UpperCamelCase					   =	None


class 							UpperCAmelCase__	:



 def __init__(	self      )	->				int:
  __UpperCamelCase					   =	None
  __UpperCamelCase					   =	None



 def __iter__(	self      )	->				Any:
  __UpperCamelCase					   =	self.head
  while self.head:
   yield node.data
   __UpperCamelCase					   =	node.next
   if node == self.head:
    break



 def __len__(	self      )	->				Optional[int]:
  return sum(1 for _ in self      )



 def __repr__(	self      )	->				List[Any]:
  return "->".join(str(lowercase_      ) for item in iter(self      )      )



 def  __lowerCamelCase					(	self		,						lowercase      )	->				str:
  self.insert_nth(len(self      )		,						lowercase_      )



 def  __lowerCamelCase					(	self		,						lowercase      )	->				Optional[Any]:
  self.insert_nth(0		,						lowercase_      )



 def  __lowerCamelCase					(	self		,						lowercase		,						lowercase      )	->				Dict:


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



 def  __lowerCamelCase					(	self      )	->				Dict:
  return self.delete_nth(0      )



 def  __lowerCamelCase					(	self      )	->				int:
  return self.delete_nth(len(self      ) - 1      )



 def  __lowerCamelCase					(	self		,						lowercase = 0      )	->				Optional[int]:


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




 def  __lowerCamelCase					(	self      )	->				Dict:
  return len(self      ) == 0







def _lowercase (	):



 '''simple docstring'''



 __UpperCamelCase					   =	CircularLinkedList()
 assert len(SCREAMING_SNAKE_CASE_							) == 0
 assert circular_linked_list.is_empty() is True
 assert str(SCREAMING_SNAKE_CASE_							) == ""

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

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

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

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

 assert circular_linked_list.is_empty() is False


if __name__ == "__main__":
 import doctest

 doctest.testmod()






'''simple docstring'''


from typing import TYPE_CHECKING

from ...utils import OptionalDependencyNotAvailable, _LazyModule, is_torch_available


__snake_case						  =		{
    """configuration_git""": ["""GIT_PRETRAINED_CONFIG_ARCHIVE_MAP""", """GitConfig""", """GitVisionConfig"""],
    """processing_git""": ["""GitProcessor"""],
}

try:
       if not is_torch_available():
              raise OptionalDependencyNotAvailable()
except OptionalDependencyNotAvailable:
       pass
else:
       __snake_case						  =		[
           """GIT_PRETRAINED_MODEL_ARCHIVE_LIST""",
           """GitForCausalLM""",
           """GitModel""",
           """GitPreTrainedModel""",
           """GitVisionModel""",
       ]

if TYPE_CHECKING:
       from .configuration_git import GIT_PRETRAINED_CONFIG_ARCHIVE_MAP, GitConfig, GitVisionConfig
       from .processing_git import GitProcessor

       try:
              if not is_torch_available():
                     raise OptionalDependencyNotAvailable()
       except OptionalDependencyNotAvailable:
              pass
       else:
              from .modeling_git import (
                  GIT_PRETRAINED_MODEL_ARCHIVE_LIST,
                  GitForCausalLM,
                  GitModel,
                  GitPreTrainedModel,
                  GitVisionModel,
              )

else:
       import sys

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

