What are some common errors when using sets in Python?

What are some common errors when using sets in Python?

Some common errors include trying to add mutable types like lists to a set, or using sets with unhashable types.

Can you explain why mutable types can't be added to a set?

Mutable types can change, which would affect the set's integrity. Sets require immutable types to maintain uniqueness.

What happens if I try to add a list to a set?

You'll get a TypeError because lists are mutable and cannot be hashed.

Are there any other common mistakes I should be aware of?

Yes, another mistake is using the add method incorrectly or misunderstanding how set operations like union and intersection work.