python - 列表索引必须不是列表

Question

当pole[i][j] == 1时我需要采取行动，但它会抛出错误:

TypeError: list indices must be integers or slices, not list

pole = [[0,1,0],
        [1,0,1],
        [0,1,1]]
for i in pole:
    for j in pole:
        if pole[i][j] == 1:
            my_code()

Answer 1

您使用 for i in pole 获取 pole 的实际值而不是索引。这是更正后的代码:

pole = [[0,1,0],
        [1,0,1],
        [0,1,1]]
for i in range(len(pole)):
    for j in range(len(pole[i])):
        if pole[i][j] == 1:
            my_code()

或者，您可以使用值而不是索引:

pole = [[0,1,0],
        [1,0,1],
        [0,1,1]]
for i in pole:
    for j in i:
        if j == 1:
            my_code()