Accessing the Elements of a Set

Because sets are unordered, you cannot access their elements by index like you would with a list or tuple. However, you can:

Check for the existence of an element using the in keyword;
Iterate through the elements using a for loop.

Verifying Membership with `in`

The in keyword allows you to check if a specific element exists within a set:


              123456
            
# Define a set of favorite movies
movies = {"Inception", "Interstellar", "Tenet", "Dunkirk", "Memento"}

# Check if specific movies are in the set
print("Inception" in movies)  # True
print("Avatar" in movies)     # False

Iterating Through a Set with a `for` Loop

You can iterate over a set using a for loop to process each element individually. Since sets are unordered, the iteration order is unpredictable.


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# Define a set of favorite movies
movies = {"Inception", "Interstellar", "Tenet", "Dunkirk", "Memento"}

# Iterate through the set and print each movie title
print("Movie collection:")
for movie in movies:
    print(movie)

Each element in the set is accessed once during iteration. The order of elements in the output may vary.

Task

Swipe to start coding

You are given a fairly large set of the most popular movies.

Your goal:

Assign a boolean value to the variable is_first_movie_present to check if the movie "The Green Mile" is in the set.
Assign a boolean value to the variable is_second_movie_present to check if the movie "Titanic" is in the set.
Assign a boolean value to the variable is_third_movie_present to check if the movie "Interstellar" is in the set.
Use the in keyword to accomplish this task.

Solution

Switch to desktop for real-world practiceContinue from where you are using one of the options below

Everything was clear?

Thanks for your feedback!

Section 4. Chapter 4

Accessing the Elements of a Set

Because sets are unordered, you cannot access their elements by index like you would with a list or tuple. However, you can:

Check for the existence of an element using the in keyword;
Iterate through the elements using a for loop.

Verifying Membership with `in`

The in keyword allows you to check if a specific element exists within a set:


              123456
            
# Define a set of favorite movies
movies = {"Inception", "Interstellar", "Tenet", "Dunkirk", "Memento"}

# Check if specific movies are in the set
print("Inception" in movies)  # True
print("Avatar" in movies)     # False

Iterating Through a Set with a `for` Loop

You can iterate over a set using a for loop to process each element individually. Since sets are unordered, the iteration order is unpredictable.


              1234567
            
# Define a set of favorite movies
movies = {"Inception", "Interstellar", "Tenet", "Dunkirk", "Memento"}

# Iterate through the set and print each movie title
print("Movie collection:")
for movie in movies:
    print(movie)

Each element in the set is accessed once during iteration. The order of elements in the output may vary.

Task

Swipe to start coding

You are given a fairly large set of the most popular movies.

Your goal:

Assign a boolean value to the variable is_first_movie_present to check if the movie "The Green Mile" is in the set.
Assign a boolean value to the variable is_second_movie_present to check if the movie "Titanic" is in the set.
Assign a boolean value to the variable is_third_movie_present to check if the movie "Interstellar" is in the set.
Use the in keyword to accomplish this task.

Solution

Switch to desktop for real-world practiceContinue from where you are using one of the options below

Everything was clear?

Thanks for your feedback!

Section 4. Chapter 4

Switch to desktop for real-world practiceContinue from where you are using one of the options below

Python Data Structures

Accessing the Elements of a Set

Verifying Membership with in

Iterating Through a Set with a for Loop

Solution

Accessing the Elements of a Set

Verifying Membership with in

Iterating Through a Set with a for Loop

Solution

Verifying Membership with `in`

Iterating Through a Set with a `for` Loop

Verifying Membership with `in`

Iterating Through a Set with a `for` Loop