save project

my_music.py

 import pygame
 from pygame import locals
-
+volume=0.2
 pygame.init()   # 初始化
 # 创建窗口
 screen = pygame.display.set_mode((640, 480))
 # 载入图片、资源
+pygame.mixer.music.set_volume(volume)
 bg_img = pygame.image.load('background.png')  # 背景图
 play_img = pygame.image.load('play.png')  # 播放按钮
 stop_img = pygame.image.load('stop.png')  # 暂停按钮
@@ -17,6 +18,18 @@ while True:
     for event in pygame.event.get():
         if event.type==locals.QUIT:
             exit()
+        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
+                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