pzelnip

class ComparableMixin:
    def __eq__(self, other):
        return not (self < other or other < self)

    def __le__(self, other):
        return not other < self

class Foo(ComparableMixin):
    def __init__(self, val):
        self.val = val

pzelnip

import random
import timeit
from copy import deepcopy

def inter_reduce(sets):
    return reduce(set.intersection, sets)

def inter_for_deepcopy(sets):
    sets = iter(sets)
    result = deepcopy(next(sets))