python的按钮单击双击事件处理，python按钮,from Tkinter

python的按钮单击双击事件处理，python按钮,from Tkinter

from Tkinter import *def hello(event):    print 'Press twice to exit'              def quit(event):                                 print 'Hi...'            import sys; sys.exit() widget = Button(None, text='Hello event world')widget.pack()widget.bind('<Button-1>', hello)             widget.bind('<Double-1>', quit)              widget.mainloop()