subset.py

class Solution(object):
    def peopleIndexes(self, favoriteCompanies):
        indices = []
        favoriteCompanies = map(set, favoriteCompanies)
        for i, person in enumerate(favoriteCompanies):
            has_subset = False
            for j, otherPerson in enumerate(favoriteCompanies):
                if i == j:
                    continue
                is_subset = True
                for c in person:
                    if c not in otherPerson:
                        is_subset = False
                        break
                if is_subset:
                    has_subset = True
                    break
            if not has_subset:
                indices.append(i)
        return indices