python二维数组怎么定义

# 定义一个3x3的二维数组
array = [[0 for _ in range(3)] for _ in range(3)]
print(array)

[[0, 0, 0], [0, 0, 0], [0, 0, 0]]

# 定义一个3x3的二维数组
array = []
for i in range(3):
    row = []
    for j in range(3):
        row.append(0)
    array.append(row)
print(array)

[[0, 0, 0], [0, 0, 0], [0, 0, 0]]

print(array[0][1])

0

array[1][2] = 1
print(array)

[[0, 0, 0], [0, 0, 1], [0, 0, 0]]

for i in range(len(array)):
    for j in range(len(array[0])):
        print(array[i][j], end=' ')
    print()

0 0 0 
0 0 1 
0 0 0