library management

 class library:

    def __init__(self,name,list):
        self.booklist=list
        self.name=name
        self.lenddict={}

    def displaybook(self):
        for list in self.booklist:
            print(list)

    def addbook(self,book):
        self.booklist.append(book)
        print(f"your book {book} added successfuly")

    def returnbook(self,book):
        if book in self.lenddict:
            self.lenddict.pop(book)
            print("thank you for using our book")
        else:
            print("sorry please enter lended book name")
    def lendbook(self,book,user):
        if book in self.booklist:
            if book not in self.lenddict.keys():
                self.lenddict.update({book:user})
                print(f"you had lended the book {book} successfuly")
            else:
                print(f"sorry this book is already lended by {self.lenddict[book]}")
        else:
            print("sorry this book is not available")
if __name__ == '__main__':
    harish=library("harish",[ ])
    while True:
        print(f"welcome to my {harish.name} library what you want to do")
        print("1. display book")
        print("2. add book")
        print("3. return book")
        print("4. lend book")

        user_choice=input("enter your choice:")
        if user_choice=="1":
            harish.displaybook()
        elif user_choice=="2":
            bookname=input("enter book name:")
            harish.addbook(bookname)
        elif user_choice=="3":
            book=input("enter book name:")
            harish.returnbook(book)
        elif user_choice=="4":
            book=input("enter book name:")
            user=input("enter your name:")
            harish.lendbook(book,user)
        else:
            print("enter valid option")