
from __future__ import annotations

from collections.abc import Iterator
from typing import Any







class     lowercase		:




       def __init__(    self       ,A__):
            lowercase						     =						data
            lowercase						     =						None







class     lowercase		:




       def __init__(    self):
            lowercase						     =						None
            lowercase						     =						None




       def __iter__(    self):
            lowercase						     =						self.head
            while self.head:
                 yield node.data
                 lowercase						     =						node.next
                 if node == self.head:
                      break




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




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




       def 			A__				(    self       ,A__):
            self.insert_nth(len(self)       ,_snake_case)




       def 			A__				(    self       ,A__):
            self.insert_nth(0       ,_snake_case)




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




       def 			A__				(    self):
            return self.delete_nth(0)




       def 			A__				(    self):
            return self.delete_nth(len(self) - 1)




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





       def 			A__				(    self):
            return len(self) == 0



def 	UpperCamelCase   (							):
     '''simple docstring'''
     lowercase						     =						CircularLinkedList()
     assert len(_SCREAMING_SNAKE_CASE		) == 0
     assert circular_linked_list.is_empty() is True
     assert str(_SCREAMING_SNAKE_CASE		) == ""

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

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

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

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

     assert circular_linked_list.is_empty() is False


if __name__ == "__main__":
       import doctest

       doctest.testmod()






from typing import TYPE_CHECKING

from ...file_utils import _LazyModule, is_tokenizers_available, is_torch_available, is_vision_available
from ...utils import OptionalDependencyNotAvailable


lowercase__		:Union[str, Any]			  =   {"configuration_dpt": ["DPT_PRETRAINED_CONFIG_ARCHIVE_MAP", "DPTConfig"]}

try:
							if not is_vision_available():
														raise OptionalDependencyNotAvailable()
except OptionalDependencyNotAvailable:
							pass
else:
							lowercase__		:List[Any]			  =   ["DPTFeatureExtractor"]
							lowercase__		:List[Any]			  =   ["DPTImageProcessor"]

try:
							if not is_torch_available():
														raise OptionalDependencyNotAvailable()
except OptionalDependencyNotAvailable:
							pass
else:
							lowercase__		:Optional[int]			  =   [
							    "DPT_PRETRAINED_MODEL_ARCHIVE_LIST",
							    "DPTForDepthEstimation",
							    "DPTForSemanticSegmentation",
							    "DPTModel",
							    "DPTPreTrainedModel",
							]


if TYPE_CHECKING:
							from .configuration_dpt import DPT_PRETRAINED_CONFIG_ARCHIVE_MAP, DPTConfig

							try:
														if not is_vision_available():
																					raise OptionalDependencyNotAvailable()
							except OptionalDependencyNotAvailable:
														pass
							else:
														from .feature_extraction_dpt import DPTFeatureExtractor
														from .image_processing_dpt import DPTImageProcessor

							try:
														if not is_torch_available():
																					raise OptionalDependencyNotAvailable()
							except OptionalDependencyNotAvailable:
														pass
							else:
														from .modeling_dpt import (
														    DPT_PRETRAINED_MODEL_ARCHIVE_LIST,
														    DPTForDepthEstimation,
														    DPTForSemanticSegmentation,
														    DPTModel,
														    DPTPreTrainedModel,
														)


else:
							import sys

							lowercase__		:List[Any]			  =   _LazyModule(__name__, globals()["__file__"], _import_structure, module_spec=__spec__)




