python - 你如何删除二维中的重复值

Question

我有一个二维列表，我想删除重复项，但仍然通过使用列表理解来保持列表中的顺序。例如下面是我的列表

Df = [[2,4,6,6,7],[3,4,5,7,9,3,5],[2,4,6,8]]

我希望我的结果是

Df2 = [[2,4,6,7],[3,4,5,7,9,],[2,4,6,8]]

Answer 1

如果顺序不重要，应该这样做

Df2 = [list(set(item)) for item in Df]

如果顺序很重要，试试下面的代码

from collections import OrderedDict
Df2 = [list(OrderedDict.fromkeys(item)) for item in Df]

输入

Df = [[2,4,6,6,7],[3,4,5,7,9,3,5],[2,4,6,8]]

输出1

Df2 = [[2, 4, 6, 7], [3, 4, 5, 7, 9], [8, 2, 4, 6]]

输出2

Df2 =[[2, 4, 6, 7], [3, 4, 5, 7, 9], [2, 4, 6, 8]]