What are the functions of sets in Python?

In Python, a set is an unordered collection data type that has the following capabilities:

1. Deduplication: The elements in a set are unique and do not appear more than once.
2. Set operations: Sets support various set operations, including union, intersection, difference, and symmetric difference.
3. Variability: Sets are mutable, allowing for the modification of elements by adding, removing, and updating them.
4. Iteration: using a for loop, you can iterate through the elements in a set.
5. Membership test: You can use the ‘in’ and ‘not in’ operators to test if an element belongs to a set.
6. Hashability: Elements in a set must be hashable, meaning they must be immutable, such as numbers, strings, and tuples.
7. Dictionary keys: The set can serve as a dictionary key because its elements are immutable.

It is important to note that because sets are unordered, they do not support accessing elements by index. If you need to access the elements of a set in order, you can convert the set to a list or use the sorted() function to sort them.