lists.md

Creating lists

To handle larger amounts of data, we cannot invent a new variable for every new data item. Somehow we need to store more data in one variable. This is where Python lists come in.

However, Python counts a bit different than humans do:

Exercise 1

Find out what each of the expressions does to the list in the center.

Exercise 2

What does the following program do?

top8 = [34465, 32025, 28569, 27531, \
        24928, 23632, 22818, 22307]

for value in top8:
    print(value)

Exercise 3

How many babies are there in total? Write a program that calculates that number.

Exercise 4

You have a list of the 20 most popular girls names from the year 2000:

['Emily', 'Hannah', 'Madison', 'Ashley', 'Sarah',
'Alexis', 'Samantha', 'Jessica', 'Elizabeth', 'Taylor',
'Lauren', 'Alyssa', 'Kayla', 'Abigail', 'Brianna',
'Olivia', 'Emma', 'Megan', 'Grace', 'Victoria']

Write a program that prints all names starting with 'A' or 'M'.

Exercise 5

Use the expressions to modify the list as indicated. Use each expression once.

Exercise 6

Create a new list containing the sum of California and New York for each name.

names = ["Emily", "Amy", "Penny", "Bernadette"]
california = [2269, 542, 54, 21]
new_york = [881, 179, 12, 11]

Exercise 7

Use the expressions to modify the list as indicated. Use each expression once.