






class 				_lowerCamelCase :



      """simple docstring"""






      def __init__( self				,						UpperCAmelCase   )       ->   List[Any]:






        '''simple docstring'''






        __snake_case   :				List[Any]        =       data
        __snake_case   :				str        =       None
        __snake_case   :				int        =       None







      def __str__( self   )       ->   str:






        '''simple docstring'''






        return F"""{self.data}"""




class 				_lowerCamelCase :



      """simple docstring"""






      def __init__( self   )       ->   Any:






        '''simple docstring'''






        __snake_case   :				str        =       None
        __snake_case   :				Any        =       None







      def __iter__( self   )       ->   int:






        '''simple docstring'''






        __snake_case   :				Optional[Any]        =       self.head
        while node:
          yield node.data
          __snake_case   :				str        =       node.next







      def __str__( self   )       ->   Union[str, Any]:






        '''simple docstring'''






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







      def __len__( self   )       ->   str:






        '''simple docstring'''






        return sum(1 for _ in self   )







      def 						UpperCAmelCase		( self				,						UpperCAmelCase   )       ->   Any:






        '''simple docstring'''






        self.insert_at_nth(0				,						UpperCAmelCase   )







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






        '''simple docstring'''






        self.insert_at_nth(len(self   )				,						UpperCAmelCase   )







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






        '''simple docstring'''






        __snake_case   :				Optional[int]        =       len(self   )

        if not 0 <= index <= length:
          raise IndexError("list index out of range"   )
        __snake_case   :				Dict        =       Node(UpperCAmelCase   )
        if self.head is None:
          __snake_case   :				Dict        =       new_node
        elif index == 0:
          __snake_case   :				int        =       new_node
          __snake_case   :				Optional[int]        =       self.head
          __snake_case   :				List[Any]        =       new_node
        elif index == length:
          __snake_case   :				Optional[int]        =       new_node
          __snake_case   :				str        =       self.tail
          __snake_case   :				Any        =       new_node
        else:
          __snake_case   :				List[str]        =       self.head
          for _ in range(0				,						UpperCAmelCase   ):
            __snake_case   :				Optional[int]        =       temp.next
          __snake_case   :				List[str]        =       new_node
          __snake_case   :				Optional[Any]        =       temp.previous
          __snake_case   :				str        =       temp
          __snake_case   :				Tuple        =       new_node







      def 						UpperCAmelCase		( self   )       ->   List[Any]:






        '''simple docstring'''






        return self.delete_at_nth(0   )







      def 						UpperCAmelCase		( self   )       ->   List[Any]:






        '''simple docstring'''






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







      def 						UpperCAmelCase		( self				,						UpperCAmelCase   )       ->   Optional[int]:






        '''simple docstring'''






        __snake_case   :				Optional[Any]        =       len(self   )

        if not 0 <= index <= length - 1:
          raise IndexError("list index out of range"   )
        __snake_case   :				Tuple        =       self.head  # default first node
        if length == 1:
          __snake_case   :				int        =       None
        elif index == 0:
          __snake_case   :				List[str]        =       self.head.next
          __snake_case   :				List[str]        =       None
        elif index == length - 1:
          __snake_case   :				Tuple        =       self.tail
          __snake_case   :				Union[str, Any]        =       self.tail.previous
          __snake_case   :				str        =       None
        else:
          __snake_case   :				Any        =       self.head
          for _ in range(0				,						UpperCAmelCase   ):
            __snake_case   :				Optional[Any]        =       temp.next
          __snake_case   :				int        =       temp
          __snake_case   :				Dict        =       temp.previous
          __snake_case   :				List[str]        =       temp.next
        return delete_node.data







      def 						UpperCAmelCase		( self				,						UpperCAmelCase   )       ->   str:






        '''simple docstring'''






        __snake_case   :				Optional[Any]        =       self.head

        while current.data != data:  # Find the position to delete
          if current.next:
            __snake_case   :				Optional[Any]        =       current.next
          else:  # We have reached the end an no value matches
            raise ValueError("No data matching given value"   )

        if current == self.head:
          self.delete_head()

        elif current == self.tail:
          self.delete_tail()

        else:  # Before: 1 <--> 2(current) <--> 3
          __snake_case   :				Dict        =       current.next  # 1 --> 3
          __snake_case   :				Optional[int]        =       current.previous  # 1 <--> 3
        return data







      def 						UpperCAmelCase		( self   )       ->   Any:






        '''simple docstring'''






        return len(self   ) == 0







def       lowerCAmelCase__(	) ->    None:
  __snake_case   :				Any        =       DoublyLinkedList()
  assert linked_list.is_empty() is True
  assert str(__lowerCamelCase				) == ""

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

  linked_list.insert_at_head(0				)
  linked_list.insert_at_tail(11				)
  assert str(__lowerCamelCase				) == "->".join(str(__lowerCamelCase				) for i in range(0   ,     12				)				)

  assert linked_list.delete_head() == 0
  assert linked_list.delete_at_nth(9				) == 10
  assert linked_list.delete_tail() == 11
  assert len(__lowerCamelCase				) == 9
  assert str(__lowerCamelCase				) == "->".join(str(__lowerCamelCase				) for i in range(1   ,     10				)				)


if __name__ == "__main__":
     from doctest import testmod

     testmod()








from typing import TYPE_CHECKING

from ...utils import OptionalDependencyNotAvailable, _LazyModule, is_torch_available, is_vision_available


_UpperCamelCase       = {
    '''configuration_deta''': ['''DETA_PRETRAINED_CONFIG_ARCHIVE_MAP''', '''DetaConfig'''],
}

try:
     if not is_vision_available():
          raise OptionalDependencyNotAvailable()
except OptionalDependencyNotAvailable:
     pass
else:
     _UpperCamelCase       = ['''DetaImageProcessor''']

try:
     if not is_torch_available():
          raise OptionalDependencyNotAvailable()
except OptionalDependencyNotAvailable:
     pass
else:
     _UpperCamelCase       = [
         '''DETA_PRETRAINED_MODEL_ARCHIVE_LIST''',
         '''DetaForObjectDetection''',
         '''DetaModel''',
         '''DetaPreTrainedModel''',
     ]


if TYPE_CHECKING:
     from .configuration_deta import DETA_PRETRAINED_CONFIG_ARCHIVE_MAP, DetaConfig

     try:
          if not is_vision_available():
               raise OptionalDependencyNotAvailable()
     except OptionalDependencyNotAvailable:
          pass
     else:
          from .image_processing_deta import DetaImageProcessor

     try:
          if not is_torch_available():
               raise OptionalDependencyNotAvailable()
     except OptionalDependencyNotAvailable:
          pass
     else:
          from .modeling_deta import (
              DETA_PRETRAINED_MODEL_ARCHIVE_LIST,
              DetaForObjectDetection,
              DetaModel,
              DetaPreTrainedModel,
          )

else:
     import sys

     _UpperCamelCase       = _LazyModule(__name__, globals()['''__file__'''], _import_structure, module_spec=__spec__)

