python3.x - Python中出现AttributeError: object has no attribute
A python spaceship game written according to the book. The code is also written according to the book, but I don’t know where the problem lies.
AttributeError: 'Ship' object has no attribute 'bullet_width' There is no problem when running the spacecraft to move left and right, but when it comes to creating bullets and triggering, problems arise
The following is the specific code:
alien_invasion.py
import sys
import pygame
from pygame.sprite import Group
from settings import Settings
from ship import Ship
import game_functions as gf
def run_game():
#初始化pygame、设置和屏幕对象
pygame.init()
ai_settings = Settings()
screen = pygame.display.set_mode((ai_settings.screen_width, ai_settings.screen_hight))
pygame.display.set_caption("Alien Invavsion")
#设置背景色
bg_color=(230,230,230)
#创建一艘飞船
ship = Ship(ai_settings, screen)
#创建一个用于存储子弹的编组
bullets = Group()
#开始游戏的主循环
while True:
#监视键盘和鼠标事件
gf.check_events(ai_settings, screen, ship, bullets)
ship.update()
bullets.update()
gf.updata_screen(ai_settings, screen, ship, bullets)
run_game()
settings.py
class Settings():
"""存储《外星人入侵》的所有设置的类"""
def __init__(self):
"""初始化游戏的设置"""
#屏幕设置
self.screen_width = 1200
self.screen_hight = 700
self.bg_color = (250,250,250)
#飞船的位置
self.ship_speed_factor = 1.5
#子弹设置
self.bullet_speed_factor = 1
self.bullet_width = 3
self.bullet_height = 15
self.bullet_color = 60, 60, 60
game_functions.py
import sys
from bullet import Bullet
import pygame
def check_keydown_events(event, ai_settings, screen, ship, bullets):
"""响应按键"""
if event.key == pygame.K_RIGHT:
ship.moving_right = True
elif event.key == pygame.K_LEFT:
ship.moving_left = True
elif event.key == pygame.K_SPACE:
#创建一颗子弹，并将其加入到编组bullets中
new_bullet = Bullet(ai_settings, screen, ship)
bullets.add(new_bullet)
def check_keyup_events(event, ship):
"""响应松开 """
if event.key == pygame.K_RIGHT:
ship.moving_right = False
elif event.key == pygame.K_LEFT:
ship.moving_left = False
def check_events(ai_settings, screen, ship, bullets):
"""响应按键和鼠标事件"""
for event in pygame.event.get():
if event.type == pygame.QUIT:
sys.exit()
elif event.type == pygame.KEYDOWN:
check_keydown_events(event, ship, screen, bullets, ai_settings)
elif event.type == pygame.KEYUP:
check_keyup_events(event,ship)
def updata_screen(ai_settings, screen, ship, bullets):
"""更新屏幕上的图像，并切换到新屏幕"""
# 每次循环时都重绘屏幕
screen.fill(ai_settings.bg_color)
#在飞船和外星人后面重绘所有子弹
for bullet in bullets.sprites():
bullet.draw_bullet()
ship.blitme()
# 让最近绘制的屏幕可见
pygame.display.flip()
ship.py
import pygame
class Ship():
def __init__(self, ai_settings, screen):
"""初始化飞船并设置其初始位置"""
self.screen=screen
self.ai_settings = ai_settings
#加载飞船图像并获取其外接矩形
self.image = pygame.image.load('images/ship.bmp')
self.rect = self.image.get_rect()
self.screen_rect = screen.get_rect()
#将每艘新飞船放在屏幕底部中央
self.rect.centerx = self.screen_rect.centerx
self.rect.bottom = self.screen_rect.bottom
#在飞船的属性center中存储小数值
self.center = float(self.rect.centerx)
#移动标志
self.moving_right = False
self.moving_left = False
def update(self):
"""根据移动标志调整飞船的位置"""
#更新飞船的center值，而不是rect
if self.moving_right and self.rect.right < self.screen_rect.right:
self.center += self.ai_settings.ship_speed_factor
if self.moving_left and self.rect.left > 0:
self.center -= self.ai_settings.ship_speed_factor
#根据self.centerx跟新的rect对象
self.rect.centerx = self.center
def blitme(self):
"""在指定位置绘制飞船"""
self.screen.blit(self.image, self.rect)
bullet.py
import pygame
from pygame.sprite import Sprite
class Bullet(Sprite):
"""一个对飞船发射子弹的进行管理的类"""
def __init__(self, ai_settings, screen, ship):
"""在飞船所处位置创建一个子弹对象"""
super(Bullet, self).__init__()
self.screen = screen
#在（0，0）处创建一个表示子弹移动的矩形，再设置正确的位置
self.rect = pygame.Rect(0, 0, ai_settings.bullet_width,
ai_settings.bullet_height)
self.rect.conterx = ship.rect.centerx
self.rect.top = ship = ship.rect.top
#存储用小数表示的子弹位置
self.y =float(self.rect.y)
self.color = ai_settings.bullet_color
self.speed_factor = ai_settings.bullet_speed_factor
def update(self):
"""向上移动子弹"""
#更新表示子弹位置的小数值
self.y -= self.speed_factor
#更新表示子弹的rect的位置
self.rect.y = self.y
def draw_bullet(self):
"""在屏幕上绘制子弹"""
pygame.draw.rect(self.screen, self.color, self.rect)
That’s all the procedures so far. Can anyone give me some advice? Thank you.
