如何從列表列表中刪除相同的列表？

Question

我想刪除具有len(a) = 5和a = [[1,2,3],[2,3,4], [0,1,2],[2,4,6],[3,6,9]]作為結果。 我怎么能得到那個？

a1 = [[1,2,3],[2,3,4]]
a2 = [[0,1,2],[2,4,6]]
a3=[[1,2,3],[0,1,2],[3,6,9]]
a = a1+a2+a3
a = [tuple(l) for l in a]
print(set(a))
print(len(a))
a=[list(ele) for ele in a]
print(a)
print(len(a))

Answer 1

您不能創建一組列表列表，因為它們不可散列。 您可以先將它們轉換為元組，然后創建一個集合：

a1 = [[1,2,3],[2,3,4]]
a2 = [[0,1,2],[2,4,6]]
a3=[[1,2,3],[0,1,2],[3,6,9]]
a = a1+a2+a3
a = [list(x) for x in set([tuple(L) for L in a])]

output：

[[0, 1, 2], [2, 4, 6], [1, 2, 3], [2, 3, 4], [3, 6, 9]]