class ShoppingCart:
    def __init__(self):
        self.items = []
    
    def add_item(self, item):
        self.items.append(item)
    
    def remove_item(self, item):
        self.items.remove(item)
    
    def checkout(self):
        total = sum(item.price for item in self.items)
        print(f'Total amount: {total}')


cart = ShoppingCart()
cart.add_item(Item("Apple", 1.5))
cart.add_item(Item("Banana", 1.0))
cart.checkout()

books = []

def add_book(noscript, author, year):
    books.append({'noscript': noscript, 'author': author, 'year': year})
    print(f"کتاب '{noscript}' با موفقیت اضافه شد.")

def list_books():
    if not books:
        print("هیچ کتابی وجود ندارد.")
    else:
        for book in books:
            print(f"عنوان: {book['noscript']}, نویسنده: {book['author']}, سال: {book['year']}")

def delete_book(noscript):
    for book in books:
        if book['noscript'] == noscript:
            books.remove(book)
            print(f"کتاب '{noscript}' حذف شد.")
            return
    print(f"کتاب '{noscript}' پیدا نشد.")


add_book("کتاب اول", "نویسنده اول", 2021)
add_book("کتاب دوم", "نویسنده دوم", 2020)
list_books()
delete_book("کتاب اول")
list_books()

name = "amiri"
name[0] = "A"
print(name)