如何修复Game对象无run_game_loop属性的AttributeError问题

报错信息 #

Traceback (most recent call last):
  File "c:\Users\james\OneDrive\Desktop\crossy rpg game\main.py", line 7, in <module>
    game.run_game_loop()
    ^^^^^^^^^^^^^^^^^^
AttributeError: 'Game' object has no attribute 'run_game_loop'
PS C:\Users\james\OneDrive\Desktop\crossy rpg game>

问题原因 #

你的game.py里，draw_objects和run_game_loop两个方法没有缩进，它们不属于Game类的成员方法，而是类外部的独立函数。所以当你创建Game实例后调用run_game_loop()时，Python找不到这个属性。

修复步骤 #

把draw_objects和run_game_loop方法缩进，放到Game类的内部，和__init__方法保持同级缩进（通常为4个空格）。

修复后的game.py代码：

import pygame
class Game:
    def __init__(self):
        self.width = 1850
        self.height = 1000
        self.white_color = (255, 255, 255)
        self.red_color = (255,0,0)
        self.green_color = (0,255,0)
        self.blue_color = (0,0,255)
        self.game_window = pygame.display.set_mode((self.width,self.height))
        self.clock = pygame.time.Clock()
        background_image = pygame.image.load('assets/background.png')
        self.background = pygame.transform.scale(background_image, (self.width,self.height))
        tresure_image = pygame.image.load('assets/tresure.jpg')
        self.tresure_image = pygame.transform.scale(tresure_image, (100,100))  
    def draw_objects(self):
        self.game_window.fill(self.white_color)
        self.game_window.blit(self.background, (0,0))
        self.game_window.blit(self.tresure_image, (900,50))
        pygame.display.update()
    def run_game_loop(self):
        while True:
            events = pygame.event.get()
            for event in events:
                if event.type == pygame.QUIT:
                    return
            self.draw_objects()
            self.clock.tick(60)

验证 #

修改后重新运行main.py，即可正常启动游戏循环，不会再出现属性错误。

内容的提问来源于stack exchange，提问作者Lol Lol