"""simple docstring"""


from __future__ import annotations

from collections.abc import Iterator
from typing import Any






class   __UpperCAmelCase		:

				def __init__( self      ,					_lowerCamelCase ):
										lowerCamelCase__   =data
										lowerCamelCase__   =None






class   __UpperCAmelCase		:

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

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

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

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

				def 						_a      ( self      ,					_lowerCamelCase ):
										self.insert_nth(len(self )      ,					SCREAMING_SNAKE_CASE_ )

				def 						_a      ( self      ,					_lowerCamelCase ):
										self.insert_nth(0      ,					SCREAMING_SNAKE_CASE_ )

				def 						_a      ( self      ,					_lowerCamelCase      ,					_lowerCamelCase ):







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

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

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

				def 						_a      ( self      ,					_lowerCamelCase = 0 ):







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






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





def      lowerCamelCase_					(   )				->   List[Any]:




						'''simple docstring'''



						lowerCamelCase__   =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()




"""simple docstring"""




from json import JSONDecodeError  # Workaround for requests.exceptions.JSONDecodeError

import requests



def 							_lowerCamelCase			(			__a = "isbn/0140328726"     ):
		SCREAMING_SNAKE_CASE_    			=			olid.strip().strip('''/'''     )  # Remove leading/trailing whitespace & slashes
		if new_olid.count('''/'''     ) != 1:
				SCREAMING_SNAKE_CASE_    			=			F'{olid} is not a valid Open Library olid'
				raise ValueError(__a     )
		return requests.get(F'https://openlibrary.org/{new_olid}.json'     ).json()



def 							_lowerCamelCase			(			__a     ):
		SCREAMING_SNAKE_CASE_    			=			{
		    '''title''': '''Title''',
		    '''publish_date''': '''Publish date''',
		    '''authors''': '''Authors''',
		    '''number_of_pages''': '''Number of pages:''',
		    '''first_sentence''': '''First sentence''',
		    '''isbn_10''': '''ISBN (10)''',
		    '''isbn_13''': '''ISBN (13)''',
		}
		SCREAMING_SNAKE_CASE_    			=			{better_key: ol_book_data[key] for key, better_key in desired_keys.items()}
		SCREAMING_SNAKE_CASE_    			=			[
		    get_openlibrary_data(author['''key''']     )['''name'''] for author in data['''Authors''']
		]
		SCREAMING_SNAKE_CASE_    			=			data['''First sentence''']['''value''']
		for key, value in data.items():
				if isinstance(__a,				__a     ):
						SCREAMING_SNAKE_CASE_    			=			''', '''.join(__a     )
		return data


if __name__ == "__main__":
						import doctest

						doctest.testmod()

						while True:
												lowerCAmelCase__				=					input('\nEnter the ISBN code to search (or \'quit\' to stop): ').strip()
												if isbn.lower() in ("", "q", "quit", "exit", "stop"):
																		break

												if len(isbn) not in (10, 13) or not isbn.isdigit():
																		print(f'''Sorry, {isbn} is not a valid ISBN.  Please, input a valid ISBN.''')
																		continue

												print(f'''\nSearching Open Library for ISBN: {isbn}...\n''')

												try:
																		lowerCAmelCase__				=					summarize_book(get_openlibrary_data(f'''isbn/{isbn}'''))
																		print('\n'.join(f'''{key}: {value}''' for key, value in book_summary.items()))
												except JSONDecodeError:  # Workaround for requests.exceptions.RequestException:
																		print(f'''Sorry, there are no results for ISBN: {isbn}.''')