例如创建一个3*3的数组方法1 直接定义
[py]matrix = [[0, 0, 0], [0, 0, 0], [0, 0, 0]][/py]
方法2 间接定义
matrix = [[0 for i in range(3)] for i in range(3)]
a=[["我","是","大"],["你","是","大"]]
