Library System

 # creat a library class

# display book
# lend book (who own the book if not present)
# add book
# return book
# Suman Library = Library(listofbooks, library_name)
# dictionary (book-nameofperson)


class Library():
    list_of_book = ['A', 'B', 'C', 'D', 'E', 'F', 'G']
    lender = {'blank': 'blank'}

    def booklist(cls):
        print(cls.list_of_book)
        print(f"THE ABOUVE BOOK BYDEFAULT REGISTER IN YOUR LIBRARY")
        i = 0
        while i<10:
            con = input("PRESS 'Y' TO ADD MORE BOOK IN REGISTER\n PRESS 'N' TO GOTHROUGH WITH DEFAULT BOOK: ")
            if con == 'Y':
                book_list = input("Enter the book name to add in Library: ")
                cls.list_of_book.append(book_list)
            i += 1
            if con == 'N':
                break

    def display(cls):
        return print(cls.list_of_book)

    def lend(cls):
        newlend = input("Enter your name: ")
        book = input("Enter The Book Name: ")
        if book in cls.list_of_book:
            cls.lender.update({book:newlend})
            cls.list_of_book.remove(book)
            return print(cls.lender, "\nLending Sussesfull")
            return print()
        if book not in cls.list_of_book:
            s = cls.lender.get(book)
            # return print(s)
            return print(f"Your book is not in stock. It is Lend to {s}")

    def addbook(cls):
        book_add = input("Enter The Book name to Add in Libary: ")
        cls.list_of_book.append(book_add)
        return print("Thank U! Your book succesfully add to the Library", cls.list_of_book)
    @classmethod
    def returnbook(cls):
        name = input("Enter your name to return the book: ")
        key_list = list(cls.lender.keys())
        val_list = list(cls.lender.values())
        if name in val_list:
            position = val_list.index(name)
            book_return = key_list[position]
            cls.list_of_book.append(book_return)
            return print("Thank u! Visit Again")
        else:
            print("U Have not lend any book! Plese Leand First")

index = ("Press D for Display Books/ "
      "Press L for Lend a Book/ "
      "Press A for Add a Book/ "
      "Press R for Return a Book/ "
         "PRESS E FOR EXIT")
print("-------------WELCOME TO THE LIBRARY SYSTEM--------------")
name = input("Enter your name to start the Library system: ")
print(f"WELCOME TO THE {name} LIBRARY SYSTEM")
s = Library()
s.booklist()
while True:
    print(index)
    user = (input("Please Enter your Choice: "))
    fuser = user.capitalize()
    if fuser == 'D':
        s.display()
    elif fuser == 'L':
        s.lend()
    elif fuser == 'A':
        s.addbook()
    elif fuser == 'R':
        s.returnbook()
    elif fuser == 'E':
        exit()
    else:
        print("Invalide Input")