save project

my_music.py

 import pygame
 from pygame import locals
-
+import os
 pygame.init()   # 初始化
 # 创建窗口
 screen = pygame.display.set_mode((640, 480))
@@ -39,7 +39,7 @@ while True:
                 pygame.mixer.music.set_volume(volume)
             if event.key == locals.K_DOWN:
                 volume -= 0.1
-                if volume < 0 <or volume==0:
+                if volume < 0:
                     volume = 0
                 pygame.mixer.music.set_volume(volume)
         if event.type == locals.MOUSEBUTTONDOWN:
@@ -51,19 +51,19 @@ while True:
                 pygame.mixer.music.pause()
                 start = play_img
 
-        if x > 120 and x < 220 and y > 350 and y < 400 
+        if x > 120 and x < 220 and y > 350 and y < 400:
             mun -= 1
-            if mun < 0
-                mun = len(filelist)-1:
+            if mun < 0:
+                mun = len(filelist)-1
             pygame.mixer.music.load(path +"\\" +music_list[num])
             pygame.mixer.music.play()
             play_butyon = stop_img
             click=0
 
-        if x > 120 and x < 220 and y > 350 and y < 400 
+        if x > 120 and x < 220 and y > 350 and y < 400: 
             mun += 1
-            if mun > 0
-                mun = len(filelist)-1:
+            if mun > 0:
+                mun = len(filelist)-1
             pygame.mixer.music.load(path +"\\" +music_list[num])
             pygame.mixer.music.play()
             play_butyon = stop_img