求指导：pygame.error: video system not initialized报错处理？

问题遇到的现象和发生背景

Python编程从入门到实践12.3开发游戏项目按照课本打的代码报错

问题相关代码，请勿粘贴截图

import sys
import pygame
from settings import Settings
from ship import Ship
class AlineInvasion:
    def __int__(self):
        pygame.init()
        self.settings = Settings()
        self.screen = pygame.display.set_mode(
            (self.settings.screen_width, self.settings.screen_height))
        self.screen = pygame.display.set_mode((1200, 800))
        pygame.display.set_caption("Aline Invasion")
        self.ship = Ship(self)

        # 设置背景颜色
        self.bg_color = (230, 230, 230)

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

            self.screen.fill(self.settings.bg_color)
            self.ship.blitme()
            pygame.display.flip()


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

运行结果及报错内容

"D:\Program Files\Anaconda3\python.exe" "D:/pycharm/MY ITEMS/蟒蛇书速查地图-1/aline.py"
Traceback (most recent call last):
File "D:\pycharm\MY ITEMS\蟒蛇书速查地图-1\aline.py", line 31, in
ai.run_game()
File "D:\pycharm\MY ITEMS\蟒蛇书速查地图-1\aline.py", line 20, in run_game
for event in pygame.event.get():
pygame.error: video system not initialized

我的解答思路和尝试过的方法

检查后不知道问题出在哪里？

我想要达到的结果

解除报错

class AlineInvasion:
    def __int__(self):
        pygame.init()

这里的__int__改成__init__