


'''simple docstring'''



class 							__UpperCamelCase    :




	def __init__(       self						,    __a						,    __a=None						,    __a=None							):

						'''simple docstring'''





						__a      :	Any    =  data
						__a      :	List[Any]    =  previous
						__a      :	Optional[int]    =  next_node




	def __str__(       self							):

						'''simple docstring'''





						return f"""{self.data}"""




	def 				__UpperCAmelCase							(       self							):

						'''simple docstring'''





						return self.data




	def 				__UpperCAmelCase							(       self							):

						'''simple docstring'''





						return self.next





	def 				__UpperCAmelCase							(       self							):

						'''simple docstring'''





						return self.previous





class 							__UpperCamelCase    :




	def __init__(       self						,    __a							):

						'''simple docstring'''





						__a      :	Optional[int]    =  head




	def __iter__(       self							):

						'''simple docstring'''





						return self





	def 				__UpperCAmelCase							(       self							):

						'''simple docstring'''





						if not self.current:
											raise StopIteration
						else:
											__a      :	Dict    =  self.current.get_data()
											__a      :	Tuple    =  self.current.get_next()
											return value





class 							__UpperCamelCase    :




	def __init__(       self							):

						'''simple docstring'''





						__a      :	Union[str, Any]    =  None  # First node in list
						__a      :	Tuple    =  None  # Last node in list




	def __str__(       self							):

						'''simple docstring'''





						__a      :	Dict    =  self.head
						__a      :	Optional[int]    =  []
						while current is not None:
											nodes.append(current.get_data()							)
											__a      :	Dict    =  current.get_next()
						return " ".join(str(__a							) for node in nodes							)




	def __contains__(       self						,    __a							):

						'''simple docstring'''





						__a      :	Dict    =  self.head
						while current:
											if current.get_data() == value:
																return True
											__a      :	Union[str, Any]    =  current.get_next()
						return False




	def __iter__(       self							):

						'''simple docstring'''





						return LinkedListIterator(self.head							)




	def 				__UpperCAmelCase							(       self							):

						'''simple docstring'''





						if self.head:
											return self.head.get_data()
						return None




	def 				__UpperCAmelCase							(       self							):

						'''simple docstring'''





						if self.tail:
											return self.tail.get_data()
						return None




	def 				__UpperCAmelCase							(       self						,    __a							):

						'''simple docstring'''





						if self.head is None:
											__a      :	List[str]    =  node
											__a      :	List[str]    =  node
						else:
											self.insert_before_node(self.head						,    __a							)




	def 				__UpperCAmelCase							(       self						,    __a							):

						'''simple docstring'''





						if self.head is None:
											self.set_head(__a							)
						else:
											self.insert_after_node(self.tail						,    __a							)




	def 				__UpperCAmelCase							(       self						,    __a							):

						'''simple docstring'''





						__a      :	int    =  Node(__a							)
						if self.head is None:
											self.set_head(__a							)
						else:
											self.set_tail(__a							)




	def 				__UpperCAmelCase							(       self						,    __a						,    __a							):

						'''simple docstring'''





						__a      :	Optional[int]    =  node
						__a      :	Tuple    =  node.previous

						if node.get_previous() is None:
											__a      :	Any    =  node_to_insert
						else:
											__a      :	Optional[int]    =  node_to_insert

						__a      :	Tuple    =  node_to_insert




	def 				__UpperCAmelCase							(       self						,    __a						,    __a							):

						'''simple docstring'''





						__a      :	int    =  node
						__a      :	Any    =  node.next

						if node.get_next() is None:
											__a      :	Optional[Any]    =  node_to_insert
						else:
											__a      :	Any    =  node_to_insert

						__a      :	List[str]    =  node_to_insert




	def 				__UpperCAmelCase							(       self						,    __a						,    __a							):

						'''simple docstring'''





						__a      :	Union[str, Any]    =  1
						__a      :	Tuple    =  Node(__a							)
						__a      :	Union[str, Any]    =  self.head
						while node:
											if current_position == position:
																self.insert_before_node(__a						,    __a							)
																return
											current_position += 1
											__a      :	Tuple    =  node.next
						self.insert_after_node(self.tail						,    __a							)




	def 				__UpperCAmelCase							(       self						,    __a							):

						'''simple docstring'''





						__a      :	List[str]    =  self.head
						while node:
											if node.get_data() == item:
																return node
											__a      :	Dict    =  node.get_next()
						raise Exception('Node not found'							)




	def 				__UpperCAmelCase							(       self						,    __a							):

						'''simple docstring'''





						if (node := self.get_node(__a							)) is not None:
											if node == self.head:
																__a      :	Optional[Any]    =  self.head.get_next()

											if node == self.tail:
																__a      :	Union[str, Any]    =  self.tail.get_previous()

											self.remove_node_pointers(__a							)




	@staticmethod
	def 				__UpperCAmelCase							(       __a							):

						'''simple docstring'''





						if node.get_next():
											__a      :	Optional[int]    =  node.previous

						if node.get_previous():
											__a      :	Any    =  node.next

						__a      :	List[Any]    =  None
						__a      :	Tuple    =  None





	def 				__UpperCAmelCase							(       self							):

						'''simple docstring'''





						return self.head is None






def   lowerCamelCase							():
					pass


if __name__ == "__main__":
							import doctest

							doctest.testmod()







'''simple docstring'''



from .imports import is_rich_available


if is_rich_available():
	from rich.traceback import install

	install(show_locals=False)

else:
	raise ModuleNotFoundError('To use the rich extension, install rich with `pip install rich`')



