Making a Purchase


Traceback (most recent call last):
File "python", line 23, in
File "python", line 21, in compute_bill
TypeError: unhashable type: 'list'

shopping_list = ["banana", "orange", "apple"]

stock = {
    "banana": 6,
    "apple": 0,
    "orange": 32,
    "pear": 15
prices = {
    "banana": 4,
    "apple": 2,
    "orange": 1.5,
    "pear": 3

# Write your code below!
def compute_bill(food):
    for item in food:
    return total
print compute_bill(shopping_list)


inside the for loop, the food variable contains the list, the item variable contains a item in the list. you want to use to get the price of a item (prices[item]), you can't just get the price of the whole list in one go.


you iterated over food and stored that in item, so you need to use prices[item]


Thanks :slight_smile: