python 二维数组遍历

以下是两种Python遍历二维数组的方法：

1. 使用嵌套循环遍历二维数组

world = [[0, 1, 2], [3, 4, 5], [6, 7, 8]]

for i in range(len(world)):
    for j in range(len(world[i])):
        print(world[i][j])

2. 使用numpy库遍历二维数组

import numpy as np

world = np.zeros([3, 3])

for i in range(world.shape[0]):
    for j in range(world.shape[1]):
        print(world[i][j])