外来入侵项目中的问题,来自Eric Matthes的Python速成班]]

问题描述 投票:0回答:1

我是Eric Matthes的Python崩溃课程

中学习Python的新手。在“外来入侵”项目中,我遇到了麻烦。我进行了很多调查,逐行进行了比较,但找不到问题。

在最后几列中,如果出现大小写,我没有写书的逻辑?

alien_invasion.py

import sys
import pygame

from settings import Settings
from ship import Ship

class AlienInvasion:
    """Overall class to manage game assets and behavior."""

    def __init__(self):
        """Initialize the game, and create game resources."""
        pygame.init()
        self.settings = Settings()
        self.ship = Ship(self)
        self.screen = pygame.display.set_mode(
            (self.settings.screen_width, self.settings.screen_height))
        pygame.display.set_caption("Alien Invasion")
        # Set the background color.
        # self.bg_color = (self.settings.bg_color)

    def run_game(self):
        """Start the main loop for the game."""
        while True:
            # Watch for keyboard and mouse events.
            for event in pygame.event.get():
                if event.type == pygame.QUIT:
                    sys.exit()
            # Make the most recently drawn screen visible
            pygame.display.flip()
            # Redraw the screen during each pass through the loop.
            self.screen.fill(self.settings.bg_color)
            self.ship.blitme()
if __name__ == '__main__':  # investigate the logic of this line of code
    # Make a game instance, and run the game.
    ai = AlienInvasion()
    ai.run_game()

并且在ship.py中,有人可以向我解释为什么我们在初始模块中写入ai_game

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.screen_rect = ai_game.screen.get_rect()
        # Load the ship image and get its rect.
        self.image = pygame.image.load('images/ship.bmp')
        self.rect = self.image.get_rect()
        # Start each new ship at the bottom center of the screen
        self.rect.midbottom = self.screen_rect.midbottom
    def blitme(self):
        """Draw the ship at its current location."""
        self.screen.blit(self.image, self.rect)

settings.py

class Settings:
    """A class to store all settings for Alien Invasion."""
    def __init__(self):
        """Initialize the game settings."""
        # Screen settings
        self.screen_width = 1000
        self.screen_height = 650
        self.bg_color = (230, 230, 230)

当我运行Alien_invasion.py时,出现以下错误:

"C:\Users\User\PycharmProjects\Alien Invasion\venv\Scripts\python.exe" 
"C:/Users/User/PycharmProjects/Alien Invasion/alien_invasion.py"
pygame 1.9.6
Hello from the pygame community. https://www.pygame.org/contribute.html
Traceback (most recent call last):
  File "C:/Users/User/PycharmProjects/Alien Invasion/alien_invasion.py", line 37, in <module>
    ai = AlienInvasion()
  File "C:/Users/User/PycharmProjects/Alien Invasion/alien_invasion.py", line 15, in __init__
    self.ship = Ship(self)
  File "C:\Users\User\PycharmProjects\Alien Invasion\ship.py", line 8, in __init__
    self.screen = ai_game.screen
AttributeError: 'AlienInvasion' object has no attribute 'screen'

Process finished with exit code 1

我是Eric Matthes的Python速成课程中学习Python的新手。在“外来入侵”项目中,我遇到了麻烦。我进行了很多调查,逐行比较了本书,但找不到...

python python-3.x
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