List 如何将整数乘以列表列表

我有一份清单-

列表1=[[2,2]，[3,4]，[4,5]，[2,1]

我想把这个列表乘以 x=2

输出将是：

列表1=[[4,4]，[6,8]，[8,10]，[4,2]]

谢谢！

试试这个：

list_1 = [[2,2],[3,4],[4,5],[2,1]]
x = 2

[[elem*x for elem in l] for l in list_1]
>>>
[[4, 4], [6, 8], [8, 10], [4, 2]]

试试这个：

list_1 = [[2,2],[3,4],[4,5],[2,1]]
x = 2

[[elem*x for elem in l] for l in list_1]
>>>
[[4, 4], [6, 8], [8, 10], [4, 2]]