Are Sets Mutable in Python?

Are Sets Mutable in Python?

Last Updated : 03 Dec, 2024

Yes, sets are mutable in Python. This means that you can modify the contents of a set after it has been created. You can add or remove elements from a set but like dictionaries, the elements within a set must be immutable types.

Example of Mutability in Sets

Adding Elements to a Set

You can add elements to a set using add() method:

Python

# Creating a set
s = {1, 2, 3}

# Adding a new element
s.add(4)

print(s)

Output

{1, 2, 3, 4}

What Does It Mean for Sets to Be Mutable?

When we say that sets are mutable, we mean that:

You can add elements to a set after it is created.
You can remove elements from a set.
You can update a set by performing set operations (like union, intersection, etc.).

Are Sets Mutable in Python?

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