逐个比较2维数组以定义python中的最大值

def compare_arrays(arr1, arr2):
    max_value = arr1[0][0]  # 初始化为第一个元素
    for row in arr1:
        for num in row:
            if num > max_value:
                max_value = num
    for row in arr2:
        for num in row:
            if num > max_value:
                max_value = num
    return max_value

# 两个示例数组
array1 = [[1, 2, 3], [4, 5, 6], [7, 8, 9]]
array2 = [[10, 11, 12], [13, 14, 15], [16, 17, 18]]

# 调用函数并打印结果
print(compare_arrays(array1, array2))