save project

my_music.py

 import pygame
 from pygame import locals
-
+pygame.init()
 # 创建窗口
 screen = pygame.display.set_mode((640, 480))
 # 载入图片、资源
@@ -18,33 +18,34 @@ play_button = stop_img
 while True:
     for event in pygame.event.get():
         if event.type == locals.QUIT:
-            exit()
-    if pygame.mixer.music.get_busy()  == False:
-        pygame.mixer.music.play()           
-    if event.key == locals.KEYDOWN:
-        if event.key == locals K_w:
-           volume +=0.1
-           if volume >1:
-              volume=1
-            pygame.mixer.music.set_volume(volume)
-        if event.type ==locals.KEYDOWN:
-           volume -=0.1
-           if volume=0:
-               volume < 0
-            pygame.mixer.music.set_volume(volume)
+            exit()    
+        if event.type == locals.KEYDOWN:
+            if event.key == locals.K_w:
+                volume +=0.1
+                if volume >1:
+                    volume=1
+                pygame.mixer.music.set_volume(volume)
+            if event.type == locals.K_s:
+                volume -=0.1
+                if volume<0:
+                    volume = 0
+                pygame.mixer.music.set_volume(volume)
         if event.type ==locals.MOUSEBUTTONDOWN:
             click += 1
             if click%2 ==0:
-                pygame.mixer.music.unpaus()
-                start = play_ing
+                pygame.mixer.music.unpause()
+                play_button = stop_img
+            else:
+                play_button = play_img
+                pygame.mixer.music.pause()
 
     # 绘制画面
     screen.blit(bg_img, (0, 0))      # 填充背景
-    screen.blit(start, (270, 330))   # 暂停按钮
+    screen.blit(play_button, (270, 330))   # 暂停按钮
     screen.blit(logo_img, (170, 60))    # 中间logo图
     screen.blit(last_img, (120, 350))   # 上一曲
     screen.blit(next_img, (420, 350))   # 下一曲
     # 刷新画面
-     pygame.display.update()
+    pygame.display.update()