butter-berries-13.py

from typing import NamedTuple

shopping_list = [
    "Biscuits",
    "Bread",
    "Butter",
    "Berries",
    "Bananas",
    "Bagels",
]

class SupermarketShelves(NamedTuple):
    aisle: int
    section: str

supermarket = {
    "Bread": SupermarketShelves(3, "B"),
    "Biscuits": SupermarketShelves(4, "D"),
    "Butter": SupermarketShelves(1, "B"),
    "Berries": SupermarketShelves(5, "C"),
    "Bananas": SupermarketShelves(5, "C"),
}

def order_shopping_list(shopping_list, supermarket):
    available_items = (
        item for item in shopping_list if item in supermarket.keys()
    )
    sorted_items = sorted(
        available_items,
        key=lambda item: supermarket[item].aisle,
    )

    unavailable_items = (
        item for item in shopping_list if item not in supermarket.keys()
    )

    return sorted_items, unavailable_items

items_to_buy, unavailable_items = order_shopping_list(
    shopping_list,
    supermarket,
)

print("Time to start your shopping:")
print(*items_to_buy, sep="\n")

print("\nI'm afraid these items are not stocked:")
print(*unavailable_items, sep="\n")