我已经try 了几种有效的方法.但这一次却并非如此. 请告诉我为什么?
row, col = 2, 3
mat1 = [[None]*col]*row
print(mat1)
for i in range(0, row):
for j in range(0, col):
mat1[i][j] = int(input())
print(mat1)
输入:
1
2
3
4
5
6
预期:
[[1,2,3], [4,5,6]]
获得:
[[4,5,6], [4,5,6]]