Python Lists Homework

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

Hack 1 – Add Up Numbers

Make a list of numbers. Write code to:

Find the total sum.
Find the average.

# Hack 1 – Add Up Numbers
numbers = [4, 7, 1, 9, 6, 7, 10]

# Write your code here:
# Calculate sum
total = 0
for score in numbers:
    total += score

print(f"Total points: {total}")  # 44

# Calculate average
average = total / len(numbers)
print(f"Average score: {average}")  # 6.29

Total points: 44
Average score: 6.285714285714286

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:
# Create empty dictionary to store counts
frequency = {}

# Count each item
for items in items:
    if items in frequency:
        frequency[items] += 1
    else:
        frequency[items] = 1

print(frequency)
# Output: {'cat': 2, 'dog': 1, 'bird': 3}

{'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]

# Create empty list for Even Numbers
EvenNumbers = []

# Check each number
for num in numbers:
    if num % 2 == 0:  # Check if number is even
        EvenNumbers.append(num)

print(EvenNumbers)  # [8, 12, 66, 18]

[8, 12, 66, 18]