save project

my_music.py

 import pygame
 from pygame import locals
-vol=0.2
+volume=0.2
 click=0
 x,y=(0,0)
 pygame.init()   # 初始化
@@ -21,13 +21,15 @@ while True:
             exit()
         if event.type == locals.KEYDOWN:
             if event.key == locals.K_UP:
-                vol += 0.1
-                if vol>1:
-                    vol=1
+                volume += 0.1
+                if volume>1:
+                    volume=1
+                pygame.mixer.music.set_volume(volume)
             if event.key == locals.K_DOWN:
-                vol -= 0.1
-                if vol<0:
-                    vol=0
+                volume -= 0.1
+                if volume<0:
+                    volume=0
+                pygame.mixer.music.set_volume(volume)
         #监听鼠标按下
         if event.type == locals.MOUSEBUTTONDOWN:
             if event.button==1: