Set membership testing in Python - Mini Project: Build & Apply

Set Membership Testing

📖 Scenario: You are organizing a small event and have a list of invited guests. You want to check if certain people are on the guest list quickly.

🎯 Goal: Build a program that uses a set to store invited guests and tests if specific people are invited using set membership testing.

📋 What You'll Learn

Create a set with exact invited guest names

Create a variable with a guest name to check

Use set membership testing with the in keyword

Print the result as a boolean value

💡 Why This Matters

🌍 Real World

Checking if a person is on a guest list is a common task in event planning and security.

💼 Career

Set membership testing is useful in many programming jobs for fast lookups, filtering data, and validating inputs.

1

Create the invited guests set

Create a set called invited_guests with these exact names: 'Alice', 'Bob', 'Charlie', 'Diana', and 'Ethan'.

Python

# Create the set invited_guests with the exact names
# Your code here

Need a hint?

Use curly braces {} to create a set with the names separated by commas.

2

Create a guest name to check

Create a variable called guest_to_check and set it to the string 'Charlie'.

Python

invited_guests = {'Alice', 'Bob', 'Charlie', 'Diana', 'Ethan'}
# Create the variable guest_to_check with the value 'Charlie'
# Your code here

Need a hint?

Use an equals sign = to assign the string 'Charlie' to guest_to_check.

3

Check if the guest is invited

Create a variable called is_invited and set it to the result of testing if guest_to_check is in invited_guests using the in keyword.

Python

invited_guests = {'Alice', 'Bob', 'Charlie', 'Diana', 'Ethan'}
guest_to_check = 'Charlie'
# Create is_invited by checking if guest_to_check is in invited_guests
# Your code here

Need a hint?

Use variable = value in set to test membership and store the boolean result.

4

Print the membership test result

Print the value of the variable is_invited to show if the guest is invited.

Python

invited_guests = {'Alice', 'Bob', 'Charlie', 'Diana', 'Ethan'}
guest_to_check = 'Charlie'
is_invited = guest_to_check in invited_guests
# Print the value of is_invited
# Your code here

Need a hint?

Use print(is_invited) to display the result.