Python Lists Homework

• After going through the lists lesson work on these hacks in your own repository

Hack 1 – Add Up Numbers

Make a list of numbers. Write code to:

1. Find the total sum.
2. Find the average.

# Hack 1 – Add Up Numbers
numbers = [4, 7, 1, 9, 6, 7, 10]
total = 0
# Write your code here:
for number in numbers:
    total += number
print("The total is:", total)

The total is: 44

Hack 2 – Count Repeats

Make a list with repeated items. Write code to count how many times each item appears.

# Hack 2 – Count Repeats
items = ["cat", "dog", "cat", "bird", "bird", "bird"]

# Write your code here:
itemCounts = {}
for item in items:
    if item in itemCounts:
        itemCounts[item] += 1
    else:
        itemCounts[item] = 1

print("Item counts:", itemCounts)

Item counts: {'cat': 2, 'dog': 1, 'bird': 3}

Hack 3 – Keep Only Evens

Make a list of numbers. Write code to create a new list with only even numbers.

# Hack 3 – Keep Only Evens
numbers = [3, 8, 5, 12, 7, 9, 13, 31, 66, 18]

new_numbers = []
# Write your code here:
for number in numbers:
    if number % 2 == 0:
        new_numbers.append(number)
print("Even numbers:", new_numbers)

Even numbers: [8, 12, 66, 18]