"""simple docstring"""







from __future__ import annotations

from collections.abc import Iterable
from dataclasses import dataclass
from typing import Any






class 							__snake_case:


    '''simple docstring'''





    _UpperCAmelCase       =			("_front", "_back", "_len")






    @dataclass
    class 							__snake_case:


        '''simple docstring'''





        _UpperCAmelCase       =			None
        _UpperCAmelCase       =			None
        _UpperCAmelCase       =			None







    class 							__snake_case:


        '''simple docstring'''





        _UpperCAmelCase       =			("_cur",)
        def __init__(  self					,       __lowerCamelCase	):




             '''simple docstring'''



             __A					:					Union[str, Any]								=		cur
        def __iter__(  self	):




             '''simple docstring'''



             return self

        def 						_a							(  self	):




             '''simple docstring'''



             if self._cur is None:
                  # finished iterating
                  raise StopIteration
             __A					:					Any								=		self._cur.val
             __A					:					str								=		self._cur.next_node

             return val







    def __init__(  self					,       __lowerCamelCase = None	):




         '''simple docstring'''



         __A					:					Any								=		None
         __A					:					Any								=		None
         __A					:					int								=		0

         if iterable is not None:
              # append every value to the deque
              for val in iterable:
                   self.append(__lowerCamelCase	)
    def 						_a							(  self					,       __lowerCamelCase	):




         '''simple docstring'''



         __A					:					List[str]								=		self._Node(__lowerCamelCase					,       __lowerCamelCase					,       __lowerCamelCase	)
         if self.is_empty():
              # front = back
              __A					:					int								=		node
              __A					:					Dict								=		1
         else:
              # connect nodes
              __A					:					int								=		node
              __A					:					Any								=		self._back
              __A					:					Optional[int]								=		node  # assign new back to the new node

              self._len += 1

              # make sure there were no errors
              assert not self.is_empty(), "Error on appending value."
    def 						_a							(  self					,       __lowerCamelCase	):




         '''simple docstring'''



         __A					:					Optional[int]								=		self._Node(__lowerCamelCase					,       __lowerCamelCase					,       __lowerCamelCase	)
         if self.is_empty():
              # front = back
              __A					:					int								=		node
              __A					:					List[str]								=		1
         else:
              # connect nodes
              __A					:					str								=		self._front
              __A					:					List[Any]								=		node
              __A					:					int								=		node  # assign new front to the new node

              self._len += 1

              # make sure there were no errors
              assert not self.is_empty(), "Error on appending value."
    def 						_a							(  self					,       __lowerCamelCase	):




         '''simple docstring'''



         for val in iterable:
              self.append(__lowerCamelCase	)
    def 						_a							(  self					,       __lowerCamelCase	):




         '''simple docstring'''



         for val in iterable:
              self.appendleft(__lowerCamelCase	)
    def 						_a							(  self	):




         '''simple docstring'''



         assert not self.is_empty(), "Deque is empty."

         __A					:					List[str]								=		self._back
         __A					:					Any								=		self._back.prev_node  # set new back
         # drop the last node - python will deallocate memory automatically
         __A					:					Union[str, Any]								=		None

         self._len -= 1

         return topop.val
    def 						_a							(  self	):




         '''simple docstring'''



         assert not self.is_empty(), "Deque is empty."

         __A					:					Tuple								=		self._front
         __A					:					Tuple								=		self._front.next_node  # set new front and drop the first node
         __A					:					Tuple								=		None

         self._len -= 1

         return topop.val
    def 						_a							(  self	):




         '''simple docstring'''



         return self._front is None
    def __len__(  self	):




         '''simple docstring'''



         return self._len
    def __eq__(  self					,       __lowerCamelCase	):




         '''simple docstring'''



         if not isinstance(__lowerCamelCase					,       __lowerCamelCase	):
              return NotImplemented

         __A					:					List[Any]								=		self._front
         __A					:					List[str]								=		other._front

         # if the length of the dequeues are not the same, they are not equal
         if len(self	) != len(__lowerCamelCase	):
              return False

         while me is not None and oth is not None:
              # compare every value
              if me.val != oth.val:
                   return False
              __A					:					Any								=		me.next_node
              __A					:					Union[str, Any]								=		oth.next_node

         return True
    def __iter__(  self	):




         '''simple docstring'''



         return Deque._Iterator(self._front	)

    def __repr__(  self	):




         '''simple docstring'''



         __A					:					Union[str, Any]								=		[]
         __A					:					List[Any]								=		self._front
         while aux is not None:
              # append the values in a list to display
              values_list.append(aux.val	)
              __A					:					Dict								=		aux.next_node

         return F'[{", ".join(repr(__lowerCamelCase	) for val in values_list	)}]'


if __name__ == "__main__":
       import doctest

       doctest.testmod()




"""simple docstring"""







import pytest

from datasets.utils.version import Version




@pytest.mark.parametrize(
    'other, expected_equality'  ,       [
        (Version('1.0.0'						), True),
        ('1.0.0', True),
        (Version('2.0.0'						), False),
        ('2.0.0', False),
        ('1', False),
        ('a', False),
        (1, False),
        (None, False),
    ]  ,       )
def 						_lowercase				(  _SCREAMING_SNAKE_CASE				:				Tuple  ,       _SCREAMING_SNAKE_CASE				:				Any						)    ->     List[str]:







     '''simple docstring'''


     __A					:					Tuple								=		Version('1.0.0'						)
     assert (version == other) is expected_equality
     assert (version != other) is not expected_equality
     assert (hash(_SCREAMING_SNAKE_CASE						) == hash(_SCREAMING_SNAKE_CASE						)) is expected_equality



