Question

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In Python, a tuple is a collection similar to a list in that it is an ordered collection of items. An important difference,

however, is that a tuple is immutable – once created, a tuple cannot be changed. Also, tuples are denoted using

parentheses instead of square brackets. As with lists, elements of a tuple are accessed using indexing notation.

For example, given the tuple subjects = (’physics’, ’chemistry’, ’biology’), we could ac

cess the elements of the tuple using subjects[0], subjects[1] and subjects[2].

Write a function grocery shopping() that takes a list of tuples called items_purchased that represent

CSE 101 – Spring 2020 Homework #2 4items purchased at a grocery store. Each tuple contains three items, in this order:

• the name of the item to purchase

• the unit cost of the item in dollars

• the number of units desired

The example tuple (’Juice’, 3, 5) indicates that we bought 3 units of “Juice” at $5 apiece, for a total of

$15.

The purpose of the function is to determine and return the name of the item that cost the most to buy.

You may assume that each named item occurs once in the list. For example, we would not fifind two tuples that

both have “Juice” as the item to purchase.

Examples:

Function Argument Return Value

[(’Bread’, 3, 3), (’Eggs’, 2, 3)] ’Bread’

[(’Milk’, 5, 2), (’Butter’, 4, 1), (’Juice’, 1, 5),

(’Eggs’, 4, 3)]

’Eggs’

[(’Milk’, 2, 2), (’Butter’, 4, 1), (’Juice’, 3, 5),

(’Eggs’, 4, 3)]

’Juice’

[(’Peas’, 5, 2), (’Meat’, 3, 13), (’Beer’, 4, 12),

(’Ice cream’, 3, 5), (’Eggs’, 3, 3)]

’Beer’

[(’Peas’, 5, 2)] ’Peas’

Note: The quotation marks displayed in the example return values are there to emphasize that the return values

are strings. Do not add quotation marks to the return values.

Answer 1

ANSWER:-

CODE:-

def grocery_shopping(lst):
    maximumCost = 0
    maxItem = ""
    # compare each item cost, if cost of any item is greater than previous max,
    # then replace that item and cost with current item
    for item in lst:
        cost = item[1]*item[2]
        if(maximumCost < cost):
            maximumCost = cost
            maxItem = item[0]
    return maxItem

print(grocery_shopping([("Bread", 3, 3), ("Eggs", 2, 3)]))
print(grocery_shopping([("Milk", 5, 2), ("Butter", 4, 1), ("Juice", 1, 5),("Eggs", 4, 3)]))
print(grocery_shopping([("Milk", 2, 2), ("Butter", 4, 1), ("Juice", 3, 5),("Eggs", 4, 3)]))
print(grocery_shopping([("Peas", 5, 2), ("Meat", 3, 13), ("Beer", 4, 12),("Ice cream", 3, 5), ("Eggs", 3, 3)]))
print(grocery_shopping([("Peas", 5, 2)]))

NOTE:- If you need any modifications in the code, please comment below. Please give postive rating.THUMBS UP.

                      THANK YOU!!!!

OUTPUT:-