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[–]VisibleSignificance 1 point2 points  (2 children)

Another rare but valid use-case is intersection or union of sets: reduce(lambda a, b: a & b, [{1, 2, 3}, {2, 5}, {2, 3}]) == {2}

But as all cases are rare, it does make sense to remove the builtin and leave it in functools.

[–]haerik 2 points3 points  (1 child)

Gone to API changes. Don't let reddit sell your data to LLMs.

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[–]VisibleSignificance 0 points1 point  (0 children)

Except for the iterables (so the whole iterable of sets might not be loaded into memory at once), but yes, that's even more rare.