制作二维对象列表（Python 2.7）

Question

我没有面向对象编程的经验。 我主要使用C进行编程，因此这有点令人困惑。 基本上，我只是想确保自己做的正确。 另外，这是继承的可行示例吗？

好的，我已经初始化了20x20的网格世界，并将每个元素设置为None。

class World:
    def __init__(self):
        self.arr = [[None for x in range(20)] for y in range(20)]

现在，我需要将一个对象放入给定的x，y坐标的指定元素中。 这是世界一流的方法。

def add_attack_robot(self, team, x, y, direction):
        self.arr[x][y] = AttackRobot() <---- **Is this correct?**

这是AttackRobot类：

class AttackRobot(Robot):
    def __init__(self,team,x,y,direction):
        Robot.__init__(self,team,x,y,direction)

Answer 1

创建列表列表听起来不错。 在解释器中自己尝试一下（有关新Python程序员可以采取的最佳建议）：

>>> [[None for x in range(20)] for y in range(20)]
[[None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None], [None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None], [None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None], [None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None], [None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None], [None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None], [None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None], [None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None], [None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None], [None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None], [None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None], [None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None], [None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None], [None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None], [None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None], [None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None], [None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None], [None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None], [None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None], [None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None]]

当您尝试实例化AttackRobot ，您将看到以下内容：

TypeError: __init__() takes exactly 5 arguments (1 given)

传递team ， x ， y和direction有效值（ self是隐式的），您应该已设置好！

例如：

self.arr[x][y] = AttackRobot(team, x, y, direction)