
from __future__ import annotations

from collections.abc import Iterator
from typing import Any







class 					lowerCamelCase		:





     def __init__(self				:   int    ,   _A				:   Any       )						->						Tuple:
         snake_case								= data
         snake_case								= None







class 					lowerCamelCase		:





     def __init__(self				:   str       )						->						List[Any]:
         snake_case								= None
         snake_case								= None





     def __iter__(self				:   Optional[Any]       )						->						Iterator[Any]:
         snake_case								= self.head
         while self.head:
             yield node.data
             snake_case								= node.next
             if node == self.head:
                 break





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





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





     def 		UpperCAmelCase(self				:   List[Any]    ,   _A				:   Any       )						->						None:
         self.insert_nth(len(self       )    ,   _A       )





     def 		UpperCAmelCase(self				:   Optional[int]    ,   _A				:   Any       )						->						None:
         self.insert_nth(0    ,   _A       )





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





     def 		UpperCAmelCase(self				:   List[str]       )						->						List[str]:
         return self.delete_nth(0       )





     def 		UpperCAmelCase(self				:   Optional[Any]       )						->						Any:
         return self.delete_nth(len(self       ) - 1       )





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





     def 		UpperCAmelCase(self				:   List[str]       )						->						bool:
         return len(self       ) == 0



def 						lowercase_      (       )							->							None:
    """simple docstring"""

    snake_case								= CircularLinkedList()
    assert len(A__		) == 0
    assert circular_linked_list.is_empty() is True
    assert str(A__		) == ""

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

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

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

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

    assert circular_linked_list.is_empty() is False


if __name__ == "__main__":
   import doctest

   doctest.testmod()



import unittest

from transformers.utils.backbone_utils import (
    BackboneMixin,
    get_aligned_output_features_output_indices,
    verify_out_features_out_indices,
)







class 					lowerCamelCase		(  unittest.TestCase  ):





     def 		UpperCAmelCase(self				:   Tuple       )						->						List[str]:
         snake_case								= ["a", "b", "c"]

         # Defaults to last layer if both are None
         snake_case					,							snake_case								= get_aligned_output_features_output_indices(_A    ,   _A    ,   _A       )
         self.assertEqual(_A    ,   ["c"]       )
         self.assertEqual(_A    ,   [2]       )

         # Out indices set to match out features
         snake_case					,							snake_case								= get_aligned_output_features_output_indices(["a", "c"]    ,   _A    ,   _A       )
         self.assertEqual(_A    ,   ["a", "c"]       )
         self.assertEqual(_A    ,   [0, 2]       )

         # Out features set to match out indices
         snake_case					,							snake_case								= get_aligned_output_features_output_indices(_A    ,   [0, 2]    ,   _A       )
         self.assertEqual(_A    ,   ["a", "c"]       )
         self.assertEqual(_A    ,   [0, 2]       )

         # Out features selected from negative indices
         snake_case					,							snake_case								= get_aligned_output_features_output_indices(_A    ,   [-3, -1]    ,   _A       )
         self.assertEqual(_A    ,   ["a", "c"]       )
         self.assertEqual(_A    ,   [-3, -1]       )





     def 		UpperCAmelCase(self				:   Optional[int]       )						->						str:
         # Stage names must be set
         with self.assertRaises(_A       ):
             verify_out_features_out_indices(["a", "b"]    ,   (0, 1)    ,   _A       )

         # Out features must be a list
         with self.assertRaises(_A       ):
             verify_out_features_out_indices(("a", "b")    ,   (0, 1)    ,   ["a", "b"]       )

         # Out features must be a subset of stage names
         with self.assertRaises(_A       ):
             verify_out_features_out_indices(["a", "b"]    ,   (0, 1)    ,   ["a"]       )

         # Out indices must be a list or tuple
         with self.assertRaises(_A       ):
             verify_out_features_out_indices(_A    ,   0    ,   ["a", "b"]       )

         # Out indices must be a subset of stage names
         with self.assertRaises(_A       ):
             verify_out_features_out_indices(_A    ,   (0, 1)    ,   ["a"]       )

         # Out features and out indices must be the same length
         with self.assertRaises(_A       ):
             verify_out_features_out_indices(["a", "b"]    ,   (0,)    ,   ["a", "b", "c"]       )

         # Out features should match out indices
         with self.assertRaises(_A       ):
             verify_out_features_out_indices(["a", "b"]    ,   (0, 2)    ,   ["a", "b", "c"]       )

         # Out features and out indices should be in order
         with self.assertRaises(_A       ):
             verify_out_features_out_indices(["b", "a"]    ,   (0, 1)    ,   ["a", "b"]       )

         # Check passes with valid inputs
         verify_out_features_out_indices(["a", "b", "d"]    ,   (0, 1, -1)    ,   ["a", "b", "c", "d"]       )





     def 		UpperCAmelCase(self				:   List[str]       )						->						str:
         snake_case								= BackboneMixin()

         snake_case								= ["a", "b", "c"]
         snake_case								= ["a", "c"]
         snake_case								= [0, 2]

         # Check that the output features and indices are set correctly
         self.assertEqual(backbone.out_features    ,   ["a", "c"]       )
         self.assertEqual(backbone.out_indices    ,   [0, 2]       )

         # Check out features and indices are updated correctly
         snake_case								= ["a", "b"]
         self.assertEqual(backbone.out_features    ,   ["a", "b"]       )
         self.assertEqual(backbone.out_indices    ,   [0, 1]       )

         snake_case								= [-3, -1]
         self.assertEqual(backbone.out_features    ,   ["a", "c"]       )
         self.assertEqual(backbone.out_indices    ,   [-3, -1]       )

