exercise_1_solution.md

Unit 3 Practice Solutions

Exercise 1 Solution

1.1

fruits = {
    'apple': .65,
    'banana': .5,
    'guava': .33
}

# Display the price of a fruit
print(f"Apples cost ${fruits['apple']} each")

# Add a fruit to the dictionary, print the dictionary to verify its creation

# add 'grapes
fruits['grapes'] = .99
print(f"Added 'grapes': {fruits}")

# Remove a fruit from the dictionary, print the dictionary to verify its deletion

# delete the key:value pair at 'banana'
del fruits['banana']
print(f"Removed 'banana': {fruits}")

Output:

Apples cost $0.65 each
Added 'grapes': {'apple': 0.65, 'banana': 0.5, 'guava': 0.33, 'grapes': 0.99}
Removed 'banana': {'apple': 0.65, 'guava': 0.33, 'grapes': 0.99}

1.2

fruits = {
    'apple': .65,
    'banana': .5,
    'guava': .33
}

# display the header label
print("  Fruits  ")
print("----------")

# loop through the keys in the fruits dictionary
fruit_names = fruits.keys()
for fruit_name in fruit_names:

# get the price of the fruit using its name as the key
price_per = fruits[fruit_name]

# print the item
print(f'{fruit_name}: {price_per}')

Output:

  Fruits
----------
apple: 0.65
banana: 0.5
guava: 0.33

1.3

The Code:

# fruits and their prices per item
fruit_prices = {
    'apple': .65,
    'banana': .5,
    'guava': .33
}

# fruits in the basket and their quantities
shopping_basket = {
    'apple': 4,
    'banana': 6,
    'guava': 8
}

# set the grand_total to zero
grand_total = 0

# loop through each fruit in the basket
for fruit in shopping_basket:

    # get the quantity of the current fruit
    quantity = shopping_basket[fruit]

    # calculate the sub_total for current fruit
    sub_total = quantity * fruit_prices[fruit]

    # add the sub_total for the current
    # fruit to the grand total
    grand_total += sub_total

    # print the sub_total for the current fruit
    print(f'{quantity} {fruit.capitalize()}s: ${sub_total}')

print("-------------")
print(f'Grand Total: ${grand_total}')

Output:

4 Apples: $2.6
6 Bananas: $3.0
8 Guavas: $2.64
-------------
Grand Total: $8.24

Keep in mind that this is just one potential solution.

< Exercise 1 | Exercise 2 >

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