编写外星人入侵程序时出现了AttributeError: Bullet object has no attribute rect，如何解决？

Question

如题，调试很久也找不大问题出处。代码如下：

import pygame
import sys
from pygame.sprite import Sprite
class Bullet(Sprite):
    def __init__(self,ai_game):
        super().__init__()
        self.screen = ai_game.screen
        self.settings = Settings()
        self.ship = Ship(ai_game)
        self.bullet_rect = pygame.Rect(0, 0, self.settings.bullet_width, self.settings.bullet_height)
        self.bullet_rect.midtop = self.ship.ship_rect.midtop
    def show(self):
        pygame.draw.rect(self.screen,self.settings.bullet_color,self.bullet_rect)
    def move(self):
        self.bullet_rect.centerx -= self.settings.bullet_speed


class Settings:
    """存储游戏设置的类"""

    def __init__(self):
        self.screen_width = 800
        self.screen_height = 800
        self.bg_color = (230, 230, 230)
        self.ship_speed = 1
        self.bullet_width = 10
        self.bullet_height = 10
        self.bullet_color = (60,60,60)
        self.bullet_speed = 0.1


class Ship:
    """控制飞船的类"""

    def __init__(self, ai_game):
        self.screen = ai_game.screen
        self.screen_rect = ai_game.screen.get_rect()
        self.settings = Settings()
        self.ship_image = pygame.image.load("D:\python\ship.bmp")
        self.ship_rect = self.ship_image.get_rect()
        self.ship_rect.midbottom = self.screen_rect.midbottom
        self.moving_right = False
        self.moving_left = False

    def show(self):
        self.screen.blit(self.ship_image, self.ship_rect)

    def move(self):
        if self.moving_right and self.ship_rect.right < self.screen_rect.right:
            self.ship_rect.centerx += self.settings.ship_speed
        if self.moving_left and self.ship_rect.left >self.screen_rect.left:
            self.ship_rect.centerx -= self.settings.ship_speed


class AlienInvasion:
    """操控游戏的主类"""

    def __init__(self):
        pygame.init()
        self.settings = Settings()
        self.bullets = pygame.sprite.Group()
        self.screen = pygame.display.set_mode((self.settings.screen_width, self.settings.screen_height))
        self.ship = Ship(self)
        pygame.display.set_caption("飞机大站")

    def check_events(self):
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                sys.exit()
            if event.type == pygame.KEYDOWN:
                if event.key == pygame.K_RIGHT:
                    self.ship.moving_right = True
                if event.key == pygame.K_LEFT:
                    self.ship.moving_left = True
                if event.key == pygame.K_SPACE:
                    self.fire_bullets()

            if event.type == pygame.KEYUP:
                if event.key == pygame.K_RIGHT:
                    self.ship.moving_right = False
                if event.key == pygame.K_LEFT:
                    self.ship.moving_left = False

    def fire_bullets(self):
        a_bullet = Bullet(self)
        self.bullets.add(a_bullet)

    def update_events(self):
        self.screen.fill(self.settings.bg_color)
        self.ship.show()
        for bullet in self.bullets.sprites():
            bullet.show()
        pygame.display.flip()

    def run_game(self):
        while True:
            self.check_events()
            self.ship.move()
            for bullet in self.bullets.copy():
                if bullet.rect.bottom < 0:
                    self.bullets.remove(bullet)
            self.update_events()


ai = AlienInvasion()
ai.run_game()

Answer 1

点击右侧采纳即可：
bullet_rect是定义在子类Bullet中的属性，但是在update_events方法中却试图调用rect属性，而不是bullet_rect属性。将update_events方法中bullet.rect改为bullet.bullet_rect即可解决该错误。