The remove() and discard() Methods

Sets in Python allow you to remove elements using the remove() and discard() methods. While both methods remove specific elements, there is a key difference:

remove(): raises a KeyError if the element is not in the set;
discard(): does not raise an error if the element is not found; it simply leaves the set unchanged.

Let's explore these methods using a movie collection theme.


              123456
            
# Attempting to remove movies
movies = {"Inception", "Interstellar", "Tenet", "Dunkirk"}

# Remove specific movies
movies.remove("Dunkirk")
movies.remove("Avatar")  # This will raise a `KeyError`

Now, let's use the discard() method, which behaves similarly but avoids errors if the specified movie is not in the set.


              12345678910
            
# Define a set of favorite movies
movies = {"Inception", "Interstellar", "Tenet", "Dunkirk", "Memento"}

# Remove specific movies using discard
movies.discard("Dunkirk")
movies.discard("Memento")
movies.discard("Avatar")

# Print the result
print("Final set:", movies)

Task

Swipe to show code editor

You decide to remove "Dunkirk" from your favorite_movies set. Use the remove() method for this task. Then, try to remove "Avatar" using the discard() method to ensure no errors occur. Print the updated set.

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 5

The remove() and discard() Methods

Sets in Python allow you to remove elements using the remove() and discard() methods. While both methods remove specific elements, there is a key difference:

remove(): raises a KeyError if the element is not in the set;
discard(): does not raise an error if the element is not found; it simply leaves the set unchanged.

Let's explore these methods using a movie collection theme.


              123456
            
# Attempting to remove movies
movies = {"Inception", "Interstellar", "Tenet", "Dunkirk"}

# Remove specific movies
movies.remove("Dunkirk")
movies.remove("Avatar")  # This will raise a `KeyError`

Now, let's use the discard() method, which behaves similarly but avoids errors if the specified movie is not in the set.


              12345678910
            
# Define a set of favorite movies
movies = {"Inception", "Interstellar", "Tenet", "Dunkirk", "Memento"}

# Remove specific movies using discard
movies.discard("Dunkirk")
movies.discard("Memento")
movies.discard("Avatar")

# Print the result
print("Final set:", movies)

Task

Swipe to show code editor

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 5

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