python使用pyhook监控键盘并实现切换歌曲的功能

import pythoncom, pyHook
import win32gui,win32api,win32con
 
Lcontrol_press = False
Lmenu_press = False
Left_press = False
 
def OnKeyboardEvent(event):
 global Lcontrol_press #在函数里面使用全局变量的时候要加上global关键字
 global Lmenu_press #要不然会出错
 global Left_press
 print 'Key:', event.Key
 if (event.Key == "Lcontrol"):
 Lcontrol_press = True
 elif(event.Key == "Lmenu"):
 Lmenu_press = True
 elif(event.Key == "Left"):
 Left_press =True
 handel_key()
 return True
def handel_key() :
 global Lcontrol_press
 global Lmenu_press
 global Left_press 
 if(Lcontrol_press and Lmenu_press and Left_press):
 win32api.keybd_event( 0xB0,win32con.VK_MEDIA_NEXT_TRACK,0,0)
 Lcontrol_press = False
 Lmenu_press = False
 Left_press = False
 
hm = pyHook.HookManager()
hm.KeyDown = OnKeyboardEvent
hm.HookKeyboard()
pythoncom.PumpMessages()