"""simple docstring"""


from __future__ import annotations

from collections.abc import Iterator
from typing import Any




class  UpperCamelCase					:







       def __init__( self,							lowerCAmelCase__)      ->      Optional[int]:
            snake_case_					       =					data
            snake_case_					       =					None




class  UpperCamelCase					:







       def __init__( self)      ->      Dict:
            snake_case_					       =					None
            snake_case_					       =					None







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







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







       def __repr__( self)      ->      str:
            return "->".join(str(lowerCAmelCase__) for item in iter(self))







       def 		a_						( self,							lowerCAmelCase__)      ->      None:
            self.insert_nth(len(self),							lowerCAmelCase__)







       def 		a_						( self,							lowerCAmelCase__)      ->      None:
            self.insert_nth(0,							lowerCAmelCase__)







       def 		a_						( self,							lowerCAmelCase__,							lowerCAmelCase__)      ->      None:
            if index < 0 or index > len(self):
                 raise IndexError('list index out of range.')
            snake_case_					       =					Node(lowerCAmelCase__)
            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 		a_						( self)      ->      str:
            return self.delete_nth(0)







       def 		a_						( self)      ->      Any:
            return self.delete_nth(len(self) - 1)







       def 		a_						( self,							lowerCAmelCase__ = 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 		a_						( self)      ->      bool:
            return len(self) == 0







def 					UpperCAmelCase    (		)				->      None:
     snake_case_					       =					CircularLinkedList()
     assert len(UpperCAmelCase					) == 0
     assert circular_linked_list.is_empty() is True
     assert str(UpperCAmelCase					) == ""

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

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

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

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

     assert circular_linked_list.is_empty() is False


if __name__ == "__main__":
    import doctest

    doctest.testmod()






import pytest

from datasets import inspect_metric, list_metrics, load_metric
@pytest.fixture
def 		UpperCamelCase	(   snake_case__       :    str	)	->     Optional[int]:
   monkeypatch.setattr('datasets.utils.deprecation_utils._emitted_deprecation_warnings'       ,     set()	)
@pytest.fixture
def 		UpperCamelCase	(   snake_case__       :    str	)	->     Any:



   class 				lowerCAmelCase_		:
          def __init__(			self,			SCREAMING_SNAKE_CASE_       )     ->		Optional[int]:
             UpperCamelCase    :  Tuple							=	metric_id






   class 				lowerCAmelCase_		:
          UpperCAmelCase__				:					Optional[int]        =  [MetricMock(a__							) for metric_id in ["accuracy", "mse", "precision", "codeparrot/apps_metric"]]
          def 					snake_case_       (			self       )     ->		str:
             return self._metrics






   monkeypatch.setattr('datasets.inspect.huggingface_hub'       ,     HfhMock()	)


@pytest.mark.parametrize(
    'func, args'       ,     [(load_metric, ('metrics/mse',)), (list_metrics, ()), (inspect_metric, ('metrics/mse', 'tmp_path'))]	)
def 		UpperCamelCase	(   snake_case__       :    str       ,     snake_case__       :    Any       ,     snake_case__       :    List[str]       ,     snake_case__       :    Optional[int]       ,     snake_case__       :    Union[str, Any]	)	->     int:
   if "tmp_path" in args:
      UpperCamelCase    :  Dict							=	tuple(arg if arg != 'tmp_path' else tmp_path for arg in args	)
   with pytest.warns(snake_case__       ,     match='https://huggingface.co/docs/evaluate'	):
      func(*snake_case__	)



