What is unique about a set in Python?

Related questions

1. What is the use of dictionary in Python?
2. Can a list be a value in a dictionary python?
3. Are lists iterable Python?
4. Are arrays mutable in python?
5. What is a dictionary in python?
6. What is set in Python?
7. How does a Python dictionary work?
8. Can a dictionary key have multiple values python?
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Tags

1. #operations
2. #unordered
3. #duplicates
4. #immutable
5. #symmetric
6. #which
7. #collection
8. #union
9. #python
10. #element
11. #every
12. #intersection
13. #items
14. #mathematical
15. #changed
16. #difference
17. #unique
18. #cannot
19. #perform