save project

my_music.py

 import pygame
 from pygame import locals
 
+volume=0.2
+pygame.mixer.music.set_volume(volume)
+
 pygame.init()   # 初始化
 # 创建窗口
 screen = pygame.display.set_mode((640, 480))
@@ -17,6 +20,18 @@ 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
+                if volume>1:
+                   volume=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