Python 当我的snake的坐标与我的随机项相同时，控制台应该打印；你拿到了&引用；但它没有'；T为什么？

下面是创建Snake基础的代码

class Snake(object):
    x_coordinate = 0
    y_coordinate = 0

    def __init__(self, x_coordinate, y_coordinate):
        grid[x_coordinate][y_coordinate] = 1
        Snake.x_coordinate = x_coordinate
        Snake.y_coordinate = y_coordinate
        print(Snake.x_coordinate)
        print(Snake.y_coordinate)

    @staticmethod
    def move_snake(direction):
        if direction == "UP":
            old_x = Snake.x_coordinate
            old_y = Snake.y_coordinate
            grid[old_x][old_y] = 0
            grid[old_x - 1][old_y] = 1
            Snake.x_coordinate = old_x - 1
            print("UP")
        if direction == "DOWN":
            old_x = Snake.x_coordinate
            old_y = Snake.y_coordinate
            grid[old_x][old_y] = 0
            grid[old_x + 1][old_y] = 1
            Snake.x_coordinate = old_x + 1
            print("DOWN")
        if direction == "LEFT":
            old_x = Snake.x_coordinate
            old_y = Snake.y_coordinate
            grid[old_x][old_y] = 0
            grid[old_x][old_y - 1] = 1
            Snake.y_coordinate = old_y - 1
            print("LEFT")
        if direction == "RIGHT":
            old_x = Snake.x_coordinate
            old_y = Snake.y_coordinate
            grid[old_x][old_y] = 0
            grid[old_x][old_y + 1] = 1
            Snake.y_coordinate = old_y + 1
            print("RIGHT")
        print("Your X and Y coordinates are {0} and {1}".format(Snake.x_coordinate, Snake.y_coordinate))

下面是创建需要获取的随机对象的代码

class RandomObject(object):
    x_coordinate = 0
    y_coordinate = 0

    def __init__(self):
        x_coordinate = random.randint(1, 15)
        y_coordinate = random.randint(1, 15)
        grid[x_coordinate][y_coordinate] = 2
        print("The items x and y coordinates are {0} and {1}".format(x_coordinate, y_coordinate))

我将它们声明为snake和random_项变量。我也把它放在了pygame事件函数中

    elif snake.x_coordinate == randomItem.x_coordinate and snake.y_coordinate == randomItem.y_coordinate:
        print("You got the item.")

---

那么这里的问题是什么？它应该可以工作，因为当我将snake移动到随机项坐标时，它会打印它们在同一坐标上，但不会发生任何事情，因此不会触发事件。

您从未设置实例属性：

class RandomObject(object):
    x_coordinate = 0
    y_coordinate = 0

    def __init__(self):
        x_coordinate = random.randint(1, 15)
        y_coordinate = random.randint(1, 15)
        grid[x_coordinate][y_coordinate] = 2
        print("The items x and y coordinates are {0} and {1}".format(x_coordinate, y_coordinate))

\uuuu init\uuu

方法设置本地值，当函数退出时，这些值会再次丢失。

RandomObject

实例没有设置属性，因此当您访问

randomItem

上的属性时，只会找到类属性（都设置为

0

）

在实例上设置它们：

注意

self.

参考

class RandomObject(object):
    x_coordinate = 0
    y_coordinate = 0

    def __init__(self):
        self.x_coordinate = random.randint(1, 15)
        self.y_coordinate = random.randint(1, 15)
        grid[self.x_coordinate][self.y_coordinate] = 2
        print("The items x and y coordinates are {0} and {1}".format(self.x_coordinate, self.y_coordinate))