import pyutil as pyu
pyu.get_local_pyinfo()

print(pyu.ps2("python-dotenv"))

from typing import List

class Solution:
  def subsets(self, nums: List[int]) -> List[List[int]]:
    ans = []

    def dfs(s: int, path: List[int]) -> None:
      ans.append(path)

      for i in range(s, len(nums)):
        dfs(i + 1, path + [nums[i]])

    dfs(0, [])
    return ans

new Solution().subsets()