我目前正试图使用python速成教程学习python，但我现在已经停止了，因为我无法继续第一个项目。每当我在pycharm或idle中运行我的程序时，我得到的都是来自pygame社区的一条消息：“pygame 2.0.1（sdl 2.0.14，python 3.9.6）您好。https://www.pygame.org/contribute.html“由于没有弹出pygame窗口，我的代码如下，感谢任何能帮助我的人：编辑：我的操作系统是windows 10 21h1，目前使用pycharm 2021.1和python 3.9.6以及pygame 2.0.1

import sys

import pygame

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

    def __init__(self):
        """Initialize the game, and create game resources."""
        pygame.init()

        self.screen = pygame.display.set_mode((1200, 800))
        pygame.display.set_caption("Alien Invasion")

        # Set the background color.
        self.bg_color = (230, 230, 230)

    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()

            # Redraw the screen during each pass through the loop.
            self.screen.fill(self.bg_color)

            # Make the most recently drawn screen visible
            pygame.display.flip()

if __name__ == '__main__':
    # Make a game instance, and run the game.
    ai = AlienInvasion()
    ai.run_game()