按照书上的编写的一个python的飞船游戏 代码也都是按照书上的编写的 但就不知道问题出在哪里
下面是报错信息:
E:\Python_test\Alien_invasion\Scripts\python.exe E:/pythonProject/alien_invasion.py
pygame 2.0.1 (SDL 2.0.14, Python 3.7.1)
Hello from the pygame community. https://www.pygame.org/contribute.html
Traceback (most recent call last):
File "E:/pythonProject/alien_invasion.py", line 27, in <module>
run_game()
File "E:/pythonProject/alien_invasion.py", line 23, in run_game
ship.update()
File "E:\pythonProject\ship.py", line 31, in update
self.center += self.ai_settings.ship_speed_factor
AttributeError: 'float' object has no attribute 'ship_speed_factor'
到运行飞船左右移动的时后,按下左右键就报错:
下面是源码:
alien_invasion.py
import sys
import pygame
from settings import Settings
from ship import Ship
import game_functions as gf
def run_game():
pygame.init()
# 定义窗口大小
al_setting = Settings()
screen = pygame.display.set_mode((al_setting.screen_winth,al_setting.screen_height))
pygame.display.set_caption("Alien Invasion")
ai_settings = al_setting.ship_speed_factor
ship = Ship(ai_settings, screen)
# 游戏主循环
while True:
# 监听键盘鼠标
gf.check_events(ship)
ship.update()
# 显示界面
gf.update_screen(al_setting,screen,ship)
run_game()
ship.py
import pygame
class Ship():
def __init__(self, ai_settings, screen):
"""初始化飞船并设置初始位置"""
self.screen = screen
self.ai_settings = ai_settings
# 加载飞船图像并获取其外形矩阵
self.image = pygame.image.load('images/airplane.bmp')
self.rect = self.image.get_rect()
self.screen_rect = screen.get_rect()
# 将每搜新飞船初始化位置 - 屏幕底部中央位置
self.rect.centerx = self.screen_rect.centerx
self.rect.bottom = self.screen_rect.bottom
# 在飞船属性center中存储小数值
self.center = float(self.rect.centerx)
# 移动标志 -右
self.moving_right = False
# 移动标志 -左
self.moving_left = False
def update(self):
"""根据移动标志调整飞船位置"""
if self.moving_right:
self.center += self.ai_settings.ship_speed_factor
if self.moving_left:
self.center -= self.ai_settings.ship_speed_factor
# 根据self.center更新rect对象
self.rect.centerx = self.center
def blitem(self):
"""指定位置绘制飞船"""
self.screen.blit(self.image, self.rect)
settings.py
class Settings():
def __init__(self):
"""初始化游戏设置"""
self.screen_winth = 1200
self.screen_height = 800
self.bg_color = (230,230,230)
# 飞船的飞行速度
self.ship_speed_factor = 1.5
game_functions.py
import sys
import pygame
import ship
def check_events(ship):
"""监听键盘和鼠标事件"""
for event in pygame.event.get():
if event.type == pygame.QUIT:
sys.exit()
elif event.type == pygame.KEYDOWN:
if event.key == pygame.K_RIGHT:
#向右移动飞船
ship.moving_right = True
elif event.key == pygame.K_LEFT:
#向右移动飞船
ship.moving_left = True
elif event.type == pygame.KEYUP:
if event.key == pygame.K_RIGHT:
ship.moving_right = False
elif event.key == pygame.K_LEFT:
ship.moving_left = False
def update_screen(ai_settings, screen, ship):
"""更新屏幕上的图像,并切换到新屏幕"""
# 每次循环都会重绘屏幕
screen.fill(ai_settings.bg_color)
ship.blitem()
#刷新屏幕,是最新绘制的屏幕可见
pygame.display.flip()
这是全部代码了,运行时一按左右键,就报错了,怎不知道哪里错了,麻烦各位大佬帮忙看看,指正一下哪里的问题,谢谢。