save project

my_music.py

 import pygame
 from pygame import locals
+import os
 
 pygame.init()  # 初始化
 # 创建窗口
@@ -15,7 +16,6 @@ logo_img = pygame.image.load('logo.png')  # 下一曲按钮
 # 载入音乐
 filelist = ['歌曲1.wav','歌曲2.wav','歌曲3.wav','歌曲4.ogg']
 num=-1  # 载入音乐      
-
 volume = 0.2
 pygame.mixer.music.set_volume(volume)  # 初始播放音量
 click = 0
@@ -50,6 +50,10 @@ while True:
                     else:
                         play_button = play_img
                         pygame.mixer.music.pause()
+                if x>120 and x<220 and y >350 and y<400:
+                    num-=1
+                    if num <0:
+                        num = len(music_list)-1
 
     if pygame.mixer.music.get_busy() == False:
         num += 1