学习python从入门到实战遇到的问题遇到的问题，引入pygame.sprite使用Group创建一个编组，但使用时出现了问题
报错：check_events() missing 1 required positional argument: 'bullets'
alien_invasion.py
import pygame
import settings
from ship import Ship
import game_functions as gf
from pygame.sprite import Group
def run_game():
# 初始化pygame、设置和屏幕对象
pygame.init()
ai_settings = settings.Settings()
screen = pygame.display.set_mode((ai_settings.screen_width, ai_settings.screen_height))
pygame.display.set_caption("Alien Invasion")
# 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:
gf.check_events(ai_settings, screen, ship, bullets)
ship.update()
bullets.update()
gf.update_screen(ai_settings, screen, ship, bullets)
run_game()
game_functions.py
import sys
import pygame
from bullet import Bullet
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，并加入编组bullets
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(event,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, ai_settings, screen, ship, bullets)
elif event.type == pygame.KEYUP:
check_keyup_events(event, ship)
def update_screen(ai_settings, screen, ship, bullets):
# 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()
settings.py
class Settings():
# 存储外星人所有设置
def __init__(self):
self.screen_width=900
self.screen_height=600
self.bg_color=(230,230,230)
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
bullet.py
import pygame
from pygame.sprite import Sprite
class Bullet(Sprite):
"""一个对飞船发射的子弹进行管理的类"""
def __init__(self, ai_settings, screen, ship):
"""在飞船所处的位置创建一个子弹对象"""
super().__init__()
self.screen = screen
# 在(0,0)处创建一个表示子弹的矩形，再设置正确的位置
self.rect = pygame.Rect(0, 0, ai_settings.bullet_width, ai_settings.bullet_height)
self.rect.centerx = ship.rect.centerx
self.rect.top = ship.rect.top
# 存储用小数表示子弹位置
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)
这个问题我找到了
def check_events(event,ai_settings, screen, ship, bullets):
for event in pygame.event.get():
第一个参数event去掉就可以了，不用定义这个形参，这个event是pygame.event.get():直接获取的，不是自定义的
看代码没有问题的呀，bullets 已经创建过了的。
import pygame
import settings
from ship import Ship
import game_functions as gf
from pygame.sprite import Group
def run_game():
# 初始化pygame、设置和屏幕对象
pygame.init()
ai_settings = settings.Settings()
screen = pygame.display.set_mode((ai_settings.screen_width, ai_settings.screen_height))
pygame.display.set_caption("Alien Invasion")
# 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:
gf.check_events(ai_settings, screen, ship, bullets)
ship.update()
bullets.update()
gf.update_screen(ai_settings, screen, ship, bullets)
run_game()
game_functions.py
import sys
import pygame
from bullet import Bullet
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，并加入编组bullets
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(event,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, ai_settings, screen, ship, bullets)
elif event.type == pygame.KEYUP:
check_keyup_events(event, ship)
def update_screen(ai_settings, screen, ship, bullets):
# 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()
settings.py
class Settings():
def init(self):
self.screen_width=900
self.screen_height=600
self.bg_color=(230,230,230)
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
bullet.py
import pygame
from pygame.sprite import Sprite
class Bullet(Sprite):
"""一个对飞船发射的子弹进行管理的类"""
def init(self, ai_settings, screen, ship):
"""在飞船所处的位置创建一个子弹对象"""
super().init()
self.screen = screen
# 在(0,0)处创建一个表示子弹的矩形，再设置正确的位置
self.rect = pygame.Rect(0, 0, ai_settings.bullet_width, ai_settings.bullet_height)
self.rect.centerx = ship.rect.centerx
self.rect.top = ship.rect.top
# 存储用小数表示子弹位置
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)