python from redisco import models class CartItem(models.Model): name = models.Attribute(required=True) price = models.FloatField(required=True) quantity = models.PositiveIntegerField(default=1) class Cart(models.Model): items = models.ListField(CartItem) cart = Cart() cart.items.append(item1) cart.items.append(item2) cart.items.append(item3) cart.save() cart_from_db = Cart.get() for item in cart_from_db.items: cart_from_db.items[0].quantity = 5 cart_from_db.save() updated_cart = Cart.get() for item in updated_cart.items: