Python menu cost calculator problem

Question

The assignment's output should be something like this:

The following is an order for a plain pizza, a ham and anchovy pizza, two "tub"-sized drinks, with a 10%-off coupon:

>>>cost_calculator([], ["ham", "anchovy"], drinks=["tub", "tub"], coupon=0.1)

35.61

I am given the prices for all the items and I should be able to calculate the cost of an order with one function. However, I cannot figure out how to count each of the elements in drinks (for example) and apply the separate prices of the different sizes (small, medium, large, tub).

I made a dictionary:

drinks = {"small":2, "medium": 3, "large": 3.5, "tub":3.75}

But I do not know how to use this to access the prices for each element of drinks (ex. drinks = ["tub", "tub"] would be priced as $7.50).

I tried to do:

for your_drinks in drinks:

your_drinks = drinks.count("small")*2 + drinks.count("medium")*4 + drinks.count("large")*3.5 + drinks.count("tub") * 3.75

return x

But this gives me $3.75, but the answer should be $7.50 for two small drinks (I have no idea why). I hard coded the prices because I did not know how to use the dictionaries logically. I am a beginner in python and I am not very knowledgeable about lists/dictionaries.

Answer 1