# None Save & Submit Code Reset Code Oops, try again. compute_bill(['apple']) returned 0 instead of 2

#1

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

stock = {
"banana": 6,
"apple": 0,
"orange": 32,
"pear": 15
}

prices = {
"banana": 4,
"apple": 2,
"orange": 1.5,
"pear": 3
}

def compute_bill(food):
total = 0
for x in food:
if stock[x] > 0:
total += prices[x]
stock[x] -= 1
None

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Oops, try again. compute_bill(['apple']) returned 0 instead of 2

#2

@bc136694,
Do not manipulate the stock dictionary by substraction.....
Just use the Instructions

1. Define a function compute_bill that takes one argument food as input.
2. In the function, create a variable total with an initial value of zero.
3. For each item in the food list, add the price of that item to total.
4. Finally, return the total.

## Ignore whether or not the item you're billing for is in stock.

Note that your function should work for any food list.

#3

here is my code
def compute_bill(food):
total = 0
for item in food:
if(stock[item] > 0):
total += prices[item]
stock[item] -= 1

print(compute_bill(['banana']))

I get a error
Oops, try again. stock doesn't look quite right! Make sure to not call compute_bill since it changes the stock! It should contain: {'orange': 32, 'pear': 15, 'banana': 6, 'apple': 0}

Can someone help me out

#4

stock is decremented for banana:
4
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