wxpython的弹出窗学习

# -*- coding: gbk -*-
import wx

class MyFrame(wx.Frame):
    def __init__(self):
        wx.Frame.__init__(self,parent=None,id=-1,title="python你好",size=(600,500))
        self.panel = wx.Panel(self)
        self.button = wx.Button(self.panel,label="确定退出",pos=(200,100),size=(80,60))
        self.Bind(wx.EVT_BUTTON,self.btClose,self.button)
    def btClose(self,event):
        dlg = wx.MessageDialog(parent=None,
                               message="你真的要退出吗?",
                               caption="请选择",
                               style=wx.YES_NO)
        if dlg.ShowModal() == wx.ID_YES:
            self.Close(True)
            
if __name__ == '__main__':
    app = wx.PySimpleApp()
    frame = MyFrame()
    frame.Show()
    app.MainLoop()