Question

我认为之前已经提出过这个问题，但我找不到适合我的问题的答案。我基本上有一个不同字符的类，每个字符都有成本。在创建角色时，我希望从玩家得分中节省成本。

以下是一个类的示例：

class Assassin(pygame.sprite.Sprite):
    def __init__(self, x, y, row, column):
        pygame.sprite.Sprite.__init__(self)
        self.image = pygame.image.load("assassin.png")
        self.x = x
        self.type = "assassin"
        self.y = y
        self.rect = self.image.get_rect(center=(self.x, self.y))
        self.damage = 60
        self.health = 40
        self.speed = 2
        self.move = False
        self.cost = 4
        self.row = row
        self.column = column

以下是我想要使用变量的代码：

 if assassin.collidepoint(pygame.mouse.get_pos()) and mouseDown[0]:
            for block in blockGroup:
                if block.team1Taken == False and block.column ==1:
                    team1.add(Assassin(block.team1[0], block.team1[1], block.row, block.column))
                    block.team1Taken = True
                    score -= Assassin.__init__.cost #Example of what I think you would do
                    break

我希望我已经很好地解释了这一点，以便了解我想要的东西。

Answer 1

您需要保留对您创建的Assassin实例的引用，然后访问其cost属性：

if assassin.collidepoint(pygame.mouse.get_pos()) and mouseDown[0]:
    for block in blockGroup:
        if block.team1Taken == False and block.column == 1:
                new_assassin = Assassin(block.team1[0], block.team1[1],
                                        block.row, block.column)
                team1.add(new_assassin)
                block.team1Taken = True
                score -= new_assassin.cost
                break

Answer 2

您无法在python中调用score -= Assassin.__init__.cost。 init 方法是Class的构造函数，应该用它来实现。

您想要的值在您创建的对象内，因此您可以直接调用assassin.cost，假设刺客是对象。

所以，你只需要改为：

if assassin.collidepoint(pygame.mouse.get_pos()) and mouseDown[0]:
            for block in blockGroup:
                if block.team1Taken == False and block.column ==1:
                    current_assassin = Assassin(block.team1[0], block.team1[1], block.row, block.column)
                    team1.add(current_assassin)
                    block.team1Taken = True
                    score -= current_assassin.cost
                    break

使用python中的类变量

2 个答案: