如何在python中声明2d数组?

有很多方法可以做到这一点。对于静态数据,我会这样做

temperature = [[6, 13, 5],
               [5, 12, 6],
               [9, 17, 8],
               [9, 20, 9],
               [7, 15, 6],
               [6, 13, 6],
               [7, 13, 6]]

请注意,您在这里实际做的是制作一个“列表列表”

>>> temperature[6]
[7, 13, 6]

>>> temperature[6][2]
6

arrayex = [[1, 2, 3],
           [2, 4, 6],
           [3, 6, 9],
           [4, 8, 12],
           [5, 10, 15],
           [6, 12, 18],
           [7, 14, 21]]

我通常都是这样做的