添加 '主程序'

主程序

@@ -0,0 +1,17 @@
+import pygame
+
+from settings import Settings
+from ship import Ship
+import game_functions as gf
+from pygame.sprite import Group
+from game_stats import GameStats
+from button import Button
+from scoreboard import Scoreboard
+
+
+def run_game():
+    # init初始化背景设置
+    pygame.init()
+    ai_settings = Settings()
+    screen = pygame.display.set_mode((ai_settings.screen_width, ai_settings.screen_height))
+    pygame.display.set_caption("Alien Invasion")