its102.md.wk.11.fn.13.number01

class PythonLabActivity:
    def sub_sets(self, sset):
        return self.subsets_recur([], sorted(sset))

    def subsets_recur(self, current, sset):
        if sset:
            return self.subsets_recur(current, sset[1:]) + self.subsets_recur(current + [sset[0]], sset[1:])
        return [current]


for name in PythonLabActivity.__dict__:
    print(name)