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#!/usr/bin/env python

# -*- coding: utf-8 -*-

# 技术支持：dwz.cn/qkEfX1u0 项目实战讨论QQ群6089740 144081101

# CreateDate: 2021-4-15

from itertools import combinations

def subsets(nums):

result = [set()]

for i in range(1,len(nums)+1):

result += [set(item) for item in combinations(nums, i)]

return result

if __name__ == "__main__":

print(subsets(set([1, 2, 3])))