Tkinter _event

#test for three event in Tkinter : command ,bind, protocolfrom Tkinter import  *import tkMessageBoxroot = Tk()def callback(event):    frame.focus_set()    print "click at:",event.x,event.ydef Key(event):    print "Pressed",repr(event.char)#bindframe = Frame(root,width =100,height =100)frame.bind('<Button-1>',callback)frame.bind('<Key>',Key)frame.pack()def printHello():    print 'Hello'#commandbutton = Button(root,text = 'print hello',command = printHello)button.pack()def closeWindow():    if tkMessageBox.askokcancel('Qiut','Do you want to exit?'):        root.destroy()#protocolroot.protocol('WM_DELETE_WINDOW',closeWindow)root.mainloop()