def lose(aliens, bullets, ship, stats, settings, screen, play_button):
'''当达成失败条件时应执行的指令'''
time.sleep(0.5)
if stats.ships_left - 1:
aliens.empty()
bullets.empty()
ship.rect.bottom = ship.screen_rect.bottom
ship.rect.centerx = ship.screen_rect.centerx
Alien.creat_aliens(settings, screen, aliens, ship)
stats.ships_left -= 1
time.sleep(0.5)
else:
play_button.button_active = True
return False
return True
def game_restart(aliens, bullets, ship, stats, settings, screen):
aliens.empty()
bullets.empty()
stats.ResetStats()
ship.center_ship()
Alien.creat_aliens(settings, screen, aliens, ship)
