class BOOK:

   title = ""

   edition = ""

   year_of_publication = ""

   pages = ""

   # create class instance

   def __new__(cls, *args, **kwargs):

       return super().__new__(cls)

   # initialize created instance

   def __init__(self, title, edition, year_of_publication, pages):

       self.title = title

       self.edition = edition

       self.year_of_publication = year_of_publication

       self.pages = pages

   def change_yop(self, yop):

       self.year_of_publication = yop

   def change_pages(self, pages):

       self.pages = pages

   def print_specs(self):

       print(self.title + " " + self.edition + " " + self.year_of_publication + " " + str(self.pages))

def add(books):

   t = input("title: ")

   e = input("edition: ")

   y = input("year of publication: ")

   p = input("pages")

   book = BOOK(t, e, y, p)

   books.append(book)

def delete(books, name):

   for book in books:

       if book.title == name:

           books.remove(book)

           return

   print("No such title")

def main():

   books = []

   book1 = BOOK("BOOK1", "Pub1", "2000", 432)

   book2 = BOOK("BOOK2", "Pub2", "1222", 23)

   books.append(book1)

   books.append(book2)

   for book in books:

       book.print_specs()

   add(books)

   for book in books:

       book.print_specs()

   del_name = input("Enter title of a book you want to delete: ")

   delete(books, del_name)

   for book in books:

       book.print_specs()

if __name__ == '__main__':

   main()