code: 
  
  
  
  
  
  class   _UpperCAmelCase	:
  
  
  
  
  					class   _UpperCAmelCase	:
  										__A          =   "_prev", "_data", "_next"
  
  
  
  
  										def __init__(						self    ,      __lowerCAmelCase    ,      __lowerCAmelCase    ,      __lowerCAmelCase       )						->  str:
  												UpperCamelCase__         =	link_p
  												UpperCamelCase__         =	element
  												UpperCamelCase__         =	link_n
  
  
  
  
  										def 	snake_case_		(						self       )						->  Dict:
  												return (
  												    F""" Prev -> {self._prev is not None}, Next -> {self._next is not None}"""
  												)
  
  
  
  
  					def __init__(						self       )						->  Optional[int]:
  							UpperCamelCase__         =	self._Node(__lowerCAmelCase    ,      __lowerCAmelCase    ,      __lowerCAmelCase       )
  							UpperCamelCase__         =	self._Node(__lowerCAmelCase    ,      __lowerCAmelCase    ,      __lowerCAmelCase       )
  							UpperCamelCase__         =	self._trailer
  							UpperCamelCase__         =	self._header
  							UpperCamelCase__         =	0
  
  
  
  
  					def __len__(						self       )						->  Optional[int]:
  							return self._size
  
  
  
  
  					def 	snake_case_		(						self       )						->  int:
  							return self.__len__() == 0
  
  
  
  
  					def 	snake_case_		(						self    ,      __lowerCAmelCase    ,      __lowerCAmelCase    ,      __lowerCAmelCase       )						->  List[str]:
  							# Create new_node by setting it's prev.link -> header
  							# setting it's next.link -> trailer
  							UpperCamelCase__         =	self._Node(__lowerCAmelCase    ,      __lowerCAmelCase    ,      __lowerCAmelCase       )
  							UpperCamelCase__         =	new_node
  							UpperCamelCase__         =	new_node
  							self._size += 1
  							return self
  
  
  
  
  					def 	snake_case_		(						self    ,      __lowerCAmelCase       )						->  int:
  							UpperCamelCase__         =	node._prev
  							UpperCamelCase__         =	node._next
  
  							UpperCamelCase__         =	successor
  							UpperCamelCase__         =	predecessor
  							self._size -= 1
  							UpperCamelCase__         =	node._data
  							UpperCamelCase__         =	UpperCamelCase__         =	UpperCamelCase__         =	None
  							del node
  							return temp
  
  
  
  
  class   _UpperCAmelCase	(   _DoublyLinkedBase					):
  
  
  
  
  					def 	snake_case_		(						self       )						->  Any:
  							if self.is_empty():
  									raise Exception("""List is empty"""       )
  							return self._header._next._data
  
  
  
  
  					def 	snake_case_		(						self       )						->  List[str]:
  							if self.is_empty():
  									raise Exception("""List is empty"""       )
  							return self._trailer._prev._data
  
  
  
  
  					def 	snake_case_		(						self    ,      __lowerCAmelCase       )						->  int:
  							return self._insert(self._header    ,      __lowerCAmelCase    ,      self._header._next       )
  
  
  
  
  					def 	snake_case_		(						self    ,      __lowerCAmelCase       )						->  str:
  							return self._insert(self._trailer._prev    ,      __lowerCAmelCase    ,      self._trailer       )
  
  
  
  
  					def 	snake_case_		(						self       )						->  Dict:
  							if self.is_empty():
  									raise IndexError("""remove_first from empty list"""       )
  							return self._delete(self._header._next       )
  
  
  
  
  					def 	snake_case_		(						self       )						->  Dict:
  							if self.is_empty():
  									raise IndexError("""remove_first from empty list"""       )
  							return self._delete(self._trailer._prev       )
  
  
  
  
  
  
style_context: 
  
  
  
  
  
  import warnings
  
  from .generation import FlaxGenerationMixin
  
  
  
  
  class   _UpperCAmelCase	(   _lowercase					):
  					# warning at import time
  					warnings.warn(
  					    "Importing `FlaxGenerationMixin` from `src/transformers/generation_flax_utils.py` is deprecated and will "
  					    "be removed in Transformers v5. Import as `from transformers import FlaxGenerationMixin` instead." ,       _lowercase ,       )
  
  
  
  
  
  