AttributeError：“设置”对象没有属性“屏幕宽度”

Question

我一直在尝试构建一个外星入侵游戏，但是当我运行它时，它给了我以下信息：“AttributeError: 'Settings' object has no attribute 'screen_width'”

我理解错误的含义，但我不明白为什么会出现错误。我仔细检查了我的拼写，甚至尝试将我的设置类和外星人入侵类中的名称更改为没有成功。有人知道可能出了什么问题吗？谢谢

class AlienInvasion:
    
    # Initialize the game and create game resources
    def __init__(self):
        pygame.init()
        self.ai_settings = Settings()

        #this code below creates the pygame screen. The set_caption method just changes th title of the window
        #remmeber that if we do not pass the attibutes (screen, etc), it is considered the default value and will not change until we change it via another method in the class
        self.screen = pygame.display.set_mode((self.ai_settings.screen_width, self.ai_settings.screen_height))
        pygame.display.set_caption("Alien Invasion")


    def run_game(self):
        while True:
            for event in pygame.event.get():
                if event.type == pygame.QUIT:
                    sys.exit()

            #create the background color
            self.screen.fill(self.ai_settings.bg_color)
            pygame.display.flip()

    `if __name__ == '__main__':
        ai = AlienInvasion()
        ai.run_game()

class Settings:
    """A class to store all settings for the Alien Invasions game."""

    def __init__(self):
        #Screen Settings
        self.screen_width= 1200
        self.screen_height = 800
        self.bg_color = (230,230,230)

Answer 1

我不知道，但经过一些格式化后，我可以正常工作。

import pygame
import sys


class Settings:
"""A class to store all settings for the Alien Invasions game."""

def __init__(self):
    # Screen Settings
    self.screen_width = 200
    self.screen_height = 200
    self.bg_color = (0, 230, 230)


class AlienInvasion:

# Initialize the game and create game resources
def __init__(self):
    pygame.init()
    self.ai_settings = Settings()

    # this code below creates the pygame screen. The set_caption method just changes th title of the window
    # remmeber that if we do not pass the attibutes (screen, etc), it is considered the default value and will not change until we change it via another method in the class
    self.screen = pygame.display.set_mode((self.ai_settings.screen_width, self.ai_settings.screen_height))
    pygame.display.set_caption("Alien Invasion")

def run_game(self):
    while True:
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                sys.exit()

        # create the background color
        self.screen.fill(self.ai_settings.bg_color)
        pygame.display.flip()


if __name__ == '__main__':
    ai = AlienInvasion()
    ai.run_game()