関連ワード:  python permutations of a list    python permutations of a list with repetition    python permutations of a list without repetition    python all permutations of a list    python get permutations of a list    python unique permutations of a list    python random permutations of a list    python generate permutations of a list    python get all permutations of a list    python generate all permutations of a list