Question

Assume you have a variable, budget, that is associated with a positive integer. Assume you have another variable, shopping_list, that is a tuple of strings representing items to purchase in order of priority. (For example: ("codelab", "textbook", "ipod", "cd", "bike")) Furthermore, assume you have a variable, prices that is a dictionary that maps items (strings such as those in your shopping list) to positive integers that are the prices of the items. Write the necessary code to determine the number of items you can purchase, given the value associated with budget, and given that you will buy items in the order that they appear in the tuple associated with shopping_list. Associate the number of items that can be bought with the variable number of items.

Answer 1

To calculate the number of items purchasable within a budget, use a for loop to iterate through the shopping_list, subtracting item prices from the budget and incrementing a counter until the budget cannot afford an item.

Step-by-step explanation:

To determine the number of items a student can purchase with their given budget, we need to iterate through the shopping_list tuple in order and subtract the item prices from the budget using the prices dictionary until the budget cannot cover any additional items. Here is a code snippet that accomplishes this task:

number_of_items = 0
for item in shopping_list:
if budget >= prices[item]:
budget -= prices[item]
number_of_items += 1
else:
break

In this code, we use a loop to go through each item in the shopping_list. If the current budget can cover the cost of the item based on its price, we deduct the price from the budget and increment the number_of_items counter by one. If the budget is not sufficient to cover an item's cost, we exit the loop, and number_of_items will then hold the total number of items that can be purchased within the budget constraint.

Answer 2

budget=455

shopping_list=("codelab", "textbook", "ipod", "cd", "bike")

prices={"codelab":300, "textbook":100,"ipod":50, "cd":10, "bike":600}

number_of_items=0

sum=0

for index in range(len(shopping_list)):

sum=sum+prices[shopping_list[index]]

if (sum<=budget):

number_of_items=number_of_items+1

else :

break

print "number of items you can purchase, for a budget of",budget,"is",number_of_items

Step-by-step explanation:

A code to determine the number of items that can be purchased is above, given the value associated with budget, and given that you will buy items in the order that they appear in the tuple associated with shopping_list.