Python Проблема с игрой в игре Alien Invasion, приводящая к сбою игры при попытке выстрела. Я только что закончил главу 12 курса Python Cra sh, и мой корабль не будет стрелять пулями, и игра зависала при нажатии пробела для стрельбы пулями. Любая помощь, которую я могу получить в решении этой проблемы, очень ценится. Ошибка атрибута указана в заголовке.
alien_invasion.py
import sys
import pygame
from settings import Settings
from ship import Ship
from bullet import Bullet
class AlienInvasion:
"""Overall class to manange game assests and behavior."""
def __init__(self):
"""Initialize the game, and create game resources."""
pygame.init()
self.settings = Settings()
self.screen = pygame.display.set_mode(
(self.settings.screen_width, self.settings.screen_height))
pygame.display.set_caption("Alien Invasion")
self.ship = Ship(self)
self.bullets = pygame.sprite.Group()
#Set the background color.
self.bg_color = (230, 230, 230)
def run_game(self):
"""Start the main loop for the game."""
while True:
self._check_events()
self.ship.update()
self._update_bullets()
self._update_screen()
# Get rid of bullets that have disappeared.
for bullet in self.bullets.copy():
if bullet.rect.bottom <= 0:
self.bullets.remove(bullet)
#print(len(self.bullets))
# Watch for keyboard and mouse events.
for event in pygame.event.get():
if event.type == pygame.QUIT:
sys.exit()
# Redraw the screen during each pass through the loop.
self.screen.fill(self.settings.bg_color)
self.ship.blitme()
# Make the most recently drawn screen availible.
pygame.display.flip()
def _check_events(self):
"""Respond to keypresses and mouse events."""
for event in pygame.event.get():
if event.type == pygame.QUIT:
sys.exit()
elif event.type == pygame.KEYDOWN:
self._check_keydown_events(event)
elif event.type == pygame.KEYUP:
self._check_keyup_events(event)
#Move th ship to the right
self.ship.rect.x += 1
def _check_keydown_events(self, event):
"""Respond to keypresses."""
if event.key == pygame.K_RIGHT:
self.ship.moving_right = True
elif event.key == pygame.K_LEFT:
self.ship.moving_left = True
elif event.key == pygame.K_q:
sys.exit()
elif event.key == pygame.K_SPACE:
self._fire_bullet()
def _check_keyup_events(self, event):
"""Responds to releases."""
if event.key == pygame.K_RIGHT:
self.ship.moving_right = False
elif event.key == pygame.K_LEFT:
self.ship.moving_left = False
def _fire_bullet(self):
"""Create a new bullet and add it to the new bullets group."""
if len(self.bullets) < self.settingsbullets_allowed:
new_bullet = Bullet(self)
self.bullets.add(new_bullet)
def _update_bullets(self):
"""Update position of bullets and get rid of old bullets."""
# Update bullet positions.
self.bullets.update()
# Get rid of bullets that have disappeared.
for bullet in self.bullets.copy():
if bullet.rect.bottom <= 0:
self.bullets.remove(bullet)
def _update_screen(self):
"""Update images on the screen, and flip to the new screen."""
self.screen.fill(self.settings.bg_color)
self.ship.blitme()
for bullet in self.bullets.sprites():
bullet.draw_bullet()
# Make the most recently drawn screen availible.
#pygame.display.flip()
if __name__ == '__main__':
# Make a game instance, and run the game.
ai = AlienInvasion()
ai.run_game()
bullet.py
import pygame
from pygame.sprite import Sprite
class Bullet(Sprite):
"""A class to manage bullets fired from a ship"""
def __init__(self, ai_game):
"""Create a bullet object at the ship's current position."""
super().__init__()
self.screen = ai_game.screen
self.settings = ai_game.settings
self.color = self.settings.bullet_color
# Create a bullet rect at (0, 0) and then set correct position.
self.rect = pygame.Rect(0, 0, self.settings.bullet_width,
self.settings.bullet_height)
self.rect.mid_top = ai_game.ship.rect.mid_top
# Store the bullet's position at a decimal value.
self.y = float(self.rect.y)
def update(self):
"""Move the bullet up the screen."""
# Update the decimal position of the bullet.
self.y -= self.settings.bullet_speed
# Update the rect position
self.rect.y = self.y
def draw_bullet(self):
"""Draw the bullet to the screen."""
pygame.draw.rect(self.screen, self.color, self.rect)
settings.py
class Settings:
"""A Class to store all settings for Alien Invasion."""
def __init__(self):
"""Initializing the game's settings."""
#Screen settings
self.screen_width = 1200
self.screen_height = 800
self.bg_color = (230, 230, 230)
#Ship settings
self.ship_speed = 1.5
#Bullet settings
self.bullet_speed = 1.0
self.bullet_width = 3
self.bullet_height = 15
self.bullet_color = (60, 60, 60)
self.bullets_allowed = 3
ship .py
import pygame
class Ship:
"""A class to manage the ship."""
def __init__(self, ai_game):
"""Initialize the ship and set its starting position."""
self.screen = ai_game.screen
self.settings = ai_game.settings
self.screen_rect = ai_game.screen.get_rect()
#Load the ship and imagine its rect.
self.image = pygame.image.load('images_ai/ship.bmp')
self.rect = self.image.get_rect()
#Start each new ship at the bottom of the screen.
self.rect.midbottom = self.screen_rect.midbottom
#Store a decimal value for the ship's horizontal position.
self.x = float(self.rect.x)
# Movement flags
self.moving_right = False
self.moving_left = False
def update(self):
"""Update the ship's position based on movement flags."""
# Update the ship's x value, not the rect.
if self.moving_right and self.rect.right < self.screen_rect.right:
self.x += self.settings.ship_speed
if self.moving_left and self.rect.left > 0:
self.x -= self.settings.ship_speed
# Update rect object from self.x.
self.rect.x = self.x
def blitme(self):
"""Draw the ship at its current location."""
self.screen.blit(self.image, self.rect)