class Settings: # 所有设置的类
# 屏幕设置
    def __init__(self):
        self.screen_width = 1280
        self.screen_height = 960
        self.bg_color = (233, 233, 233)
# 飞船设置
        self.ship_speed = 1.5
        self.ship_limit = 3
 # 子弹设置
        self.bullet_speed = 1.5
        self.bullet_width = 3
        self.bullet_height = 15
        self.bullet_color = (60, 60, 60)
        self.bullets_allowed = 3