python - Codecademy supermarket "subtract" error -


I have started programming in Python on codecademy, and I have a problem:

The following changes For your compute_bill function:

  1. When you loop through each item of food, then only add the price of the item when the item's stock is more than zero.
  2. If the item is in stock and you add value to the total, then deduct one of the item's stock calculation. "

    My code reads: 

      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 ): Total for each = 0 in the food: if the stock [every]> gt: total + = value [every] stock [every] - = 1 total food return = ["banana", "orange", "apple"] compute_bill (food)   
     I have this error  
     
     Oh, try again. Stock does not look right at all! Make sure that do not call  compute_bill  because this stock changes! It should be included: {'orange': 32, 'pear': 15, 'banana': 6, 'apples': 0 }   
     I do not understand why the problem is.   
     
     
     The message says  
     
     Be sure not to call  Compute_bill  ...   
     but your code includes:  
      compute_bill (food)   
     remove that line

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