
"""simple docstring"""


def       _snake_case				(		snake_case__   :     list[list[int]]	,      snake_case__   :     int	,      snake_case__   :     int	,      snake_case__   :     set     ):
	A   ,      A						   =   len(snake_case__     ), len(grid[0]     )
	if (
	    min(snake_case__	,      snake_case__     ) < 0
	    or row == row_length
	    or col == col_length
	    or (row, col) in visit
	    or grid[row][col] == 1
	):
		return 0
	if row == row_length - 1 and col == col_length - 1:
		return 1

	visit.add((row, col)     )

	A						   =   0
	count += depth_first_search(snake_case__	,      row + 1	,      snake_case__	,      snake_case__     )
	count += depth_first_search(snake_case__	,      row - 1	,      snake_case__	,      snake_case__     )
	count += depth_first_search(snake_case__	,      snake_case__	,      col + 1	,      snake_case__     )
	count += depth_first_search(snake_case__	,      snake_case__	,      col - 1	,      snake_case__     )

	visit.remove((row, col)     )
	return count


if __name__ == "__main__":
		import doctest

		doctest.testmod()

"""simple docstring"""


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

import requests






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






def       _snake_case				(		snake_case__   :     dict     ):
	A						   =   {
	    '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)',
	}
	A						   =   {better_key: ol_book_data[key] for key, better_key in desired_keys.items()}
	A						   =   [
	    get_openlibrary_data(author['key']     )['name'] for author in data['Authors']
	]
	A						   =   data['First sentence']['value']
	for key, value in data.items():
		if isinstance(snake_case__	,      snake_case__     ):
			A						   =   ', '.join(snake_case__     )
	return data


if __name__ == "__main__":
		import doctest

		doctest.testmod()

		while True:
				_lowercase							   =				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:
						_lowercase							   =				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}.""")