from TKinter import *
class Ui(Frame):
def __init__(self)
Frame.__init__(self, None)
self.grid()
bquit=Button(self, text="Quit", command=self.quit_pressed)
bquit.grid(row=0, column=0)
def quit_pressed(self):
self.destroy()
app=Ui()
app.mainloop()
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当我按下“退出”按钮时,为什么这个 Tkinter 程序没有正确结束?