save project

my_music.py

@@ -20,7 +20,7 @@ while True:
         if event.type == locals.QUIT:
             exit()
         if event.type == locals.KEYDOWN:
-            if event.key == locals.K_W:
+            if event.key == locals.K_w:
                 volume += 0.1
                 if volume> 1:
                     volume = 1
@@ -29,9 +29,10 @@ while True:
                 volume -= 0.1
                 if volume < 0:
                     volume = 0
+                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