How do I reduce sets in Python in pure Python?

In Python, you can reduce a set by applying a function that takes two elements and returns a single element, repeating this process until a single value remains. Although Python doesn't have a built-in reduce function tailored for sets, you can simulate this behavior using the `functools.reduce` method. Here’s an example of how to do it:


    from functools import reduce

    # Example function to apply
    def union_sets(set1, set2):
        return set1 | set2

    # Example sets
    sets = [{1, 2}, {2, 3}, {3, 4}]

    # Reducing the list of sets to their union
    result = reduce(union_sets, sets)

    print(result)  # Output: {1, 2, 3, 4}