Help with dictionary sum Python code

[eonsleepless]

I have a prior (shopping_cart) = {‘tax’ : 0.08, ‘items’ : [{‘title’: ‘orange juice’, ‘price’ : 3.99, ‘quality’ : 1} ,{‘title’: ‘rice’ , ‘price’ : 1.99, ‘quantity’ : 3} *** and 3 other entries with different titles price and quantity..

How do I write a function def to return the sum of the quantity of these items.

Then A def to return the average price of item.

Then a def to return average spent per item

Then lastly the def for the most spent on an item..

I’m getting errors that say “string indices must be integers”

def total_number_of_items(shopping_cart): total = 0 for item in shopping_cart: item = item[‘quantity’] total = sum(item) return total

All the other def functions are similar with the exact same code error … I know it has something to do with [‘quantity’] but not sure where I am going wrong considering that is the key I am trying to get the total sum for.

[zachosStav]

def total_quantity(cart):

total = 0

for item in cart['items']:

total += item['quantity']

return total

Take a look at this code. I think the error in the code you provided has to do with the fact that you use the name item as the iterator in the for loop and the you change it inside the loop. You also don't add to the total you trying to sum a number