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这是《python从入门到实践》里面的一个项目，跟着做下来，这个错误我解释不了。。。。有没有大神帮忙分析分析
完整错误信息如下：
Traceback (most recent call last):
File "E:\personal\eclipse-workspace\Alien_Invasion\alien_invasion\alien_invasion.py", line 43, in <module>
run_game()
File "E:\personal\eclipse-workspace\Alien_Invasion\alien_invasion\alien_invasion.py", line 28, in run_game
gf.check_events(init_setting,screen,gun,bullets)
File "E:\personal\eclipse-workspace\Alien_Invasion\alien_invasion\game_functions.py", line 40, in check_events
check_fire(init_setting,screen,gun,bullets,event)
File "E:\personal\eclipse-workspace\Alien_Invasion\alien_invasion\game_functions.py", line 30, in check_fire
new_bullet = Bullet(init_setting,screen,gun)
File "E:\personal\eclipse-workspace\Alien_Invasion\alien_invasion\bullet.py", line 24, in __init__
self.bullet_speed =init_setting.bullet_speed
AttributeError: 'pygame.Surface' object has no attribute 'bullet_speed'
程序文件如下：
game_function.py
#!/usr/bin/env python
#_*_ coding:utf-8 _*_
import sys
import pygame
from bullet import Bullet
def check_left(event,gun):
if event.type == pygame.KEYDOWN:
if event.key == pygame.K_LEFT:
#向左移动飞船
gun.moving_left = True
elif event.type == pygame.KEYUP:
if event.key == pygame.K_LEFT:
gun.moving_left = False
def check_right(event,gun):
if event.type == pygame.KEYDOWN:
if event.key == pygame.K_RIGHT:
# 向右移动飞船
gun.moving_right = True
elif event.type == pygame.KEYUP:
if event.key == pygame.K_RIGHT:
gun.moving_right = False
def check_fire(init_setting,screen,gun,bullets,event):
if event.type == pygame.KEYDOWN:
if event.key == pygame.K_SPACE:
#创建新子弹
new_bullet = Bullet(init_setting,screen,gun)
bullets.add(new_bullet)
def check_events(init_setting,screen,gun,bullets):
'''响应按键和鼠标输入'''
for event in pygame.event.get():
if event.type == pygame.QUIT:
sys.exit()
check_left(event, gun)
check_right(event,gun)
check_fire(init_setting,screen,gun,bullets,event)
def update_screen(setting,screen,gun,bullets):
'''更新屏幕上的图像，并换到新屏幕'''
#每次循环时重绘屏幕
screen.fill(setting.bg_color)
bullets.draw(screen)
gun.blitme()
#让最近绘制的屏幕可见
pygame.display.flip()
setting.py
#!/usr/bin/env python
#_*_ coding:utf-8 _*_
class Setting(object):
'''
储存外星人入侵的所有设置的类
'''
def __init__(self):
#初始化游戏设置
#设置屏幕
self.screen_width = 800
self.screen_height = 600
self.bg_color = (0,100,150)
self.caption = 'Alien Invasion'
self.gun_speed = 1
#设置子弹属性
#self.bullet_width = 3
#self.bullet_height = 15
#self.bullet_color = (60,60,60)
self.bullet_speed = 1
bullet.py
#!/usr/bin/env python
#_*_ coding:utf-8 _*_
import pygame
from pygame.sprite import Sprite
from setting import Setting
class Bullet(Sprite):
'''管理发射出的子弹的类'''
def __init__(self,screen,init_setting,gun):
'''在枪所在的位置创建一个子弹对象'''
super(Bullet,self).__init__()
self.screen = screen
#此处的pygame.Rect创建的对象不是一个pygame.Surface对象造成了后面的一系列错误
self.image = pygame.image.load('images/hahaha.bmp')
self.rect = self.image.get_rect()
self.rect.centerx = gun.rect.centerx
self.rect.top = gun.rect.top
self.y = float(self.rect.y)
#self.color = (60,60,60)
#这里是程序报错的点，语法逻辑上看不出来什么问题呀！用gun.py文件内的那种速度赋值方法就不会报错，可是为什么呢。。。
self.bullet_speed =init_setting.bullet_speed
def update(self):
'''向上移动子弹'''
self.y -=self.bullet_speed
self.rect.y = self.y
gun.py
#!/usr/bin/env python
#_*_ coding:utf-8 _*_
import pygame
from setting import Setting
class Gun(object):
'''
初始化枪，并设置其初始位置
'''
def __init__(self,screen):
self.screen = screen
#加载枪的图像并获取其外接矩形
self.image = pygame.image.load('images/lalala.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
#以浮点数储存中心值
self.center = float(self.rect.centerx)
self.rect.bottom = self.screen_rect.bottom
#设置移动标志
self.moving_right = False
self.moving_left = False
#设置移动速度，此处与枪的速度设置类似，用这种方法就不会报错。。。。但是为什么呢
self.speed = Setting().gun_speed
def update(self):
'''根据移动标志调整飞船位置'''
if self.moving_right and self.rect.right < self.screen_rect.right:
self.center += self.speed
elif self.moving_left and self.rect.left > 0:
self.center -= self.speed
#根据改变值更新位置
self.rect.centerx = self.center
def blitme(self):
'''在指定位置绘制枪'''
self.screen.blit(self.image,self.rect)
主程序：
#!/usr/bin/env python
#_*_ coding:utf-8 _*_
import game_functions as gf
import pygame
from setting import Setting
from gun import Gun
from pygame.sprite import Group
def run_game():
#初始化游戏并创建一个屏幕对象
pygame.init()
init_setting = Setting()
#创建屏幕对象
screen = pygame.display.set_mode(
(init_setting.screen_width,init_setting.screen_height))
pygame.display.set_caption(init_setting.caption)
#创建一个枪
gun = Gun(screen)
#创建一个子弹的组
bullets = Group()
while True:
#开始游戏主循环
#检测输入
gf.check_events(init_setting,screen,gun,bullets)
#刷新枪的位置
gun.update()
#刷新子弹的位置
bullets.update()
#删除已消失的子弹
for bullet in bullets:
if bullet.rect.bottom <= 0:
bullets.remove(bullet)
#刷新屏幕
gf.update_screen(init_setting,screen,gun,bullets)
if __name__ == '__main__':
run_game()
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