save project

my_music.py

 import pygame
 from pygame import locals
+volume=1
 
 pygame.init()   # 初始化
 # 创建窗口
@@ -18,8 +19,15 @@ while True:
     for event in pygame.event.get():
         if event.type==locals.QUIT:
             exit()
-        if
-
+        if event.type==locals.KEYDOWN:
+            if event.key==locals.K_UP:
+                volume+=0.1
+                pygame.mixer.music.set_volume(volume)
+            if event.key==locals.K_DOWN:
+                volume-=0.1
+                pygame.mixer.music.set_volume(volume)
+    if pygame.mixer.music.get_busy()==False:
+        pygame.mixer.music.play()
     # 绘制画面
     screen.blit(bg_img, (0, 0))      # 填充背景
     screen.blit(stop_img, (270, 330))   # 暂停按钮