wxPython获取应用程序对象app和主窗口对象MainFrame

　　wxPython中获取应用程序对象App以及主窗口对象MainFrame：

# -*- coding: utf-8 -*-

import wx

class MyFrame(wx.Frame):
    def __init__(self, parent, id=wx.ID_ANY, title="",
                 pos=wx.DefaultPosition, size=wx.DefaultSize,
                 style=wx.DEFAULT_FRAME_STYLE,
                 name="MyFrame"):
        super(MyFrame, self).__init__(parent, id, title,
                                      pos, size, style, name)
        
        # Attributes
        self.panel = wx.Panel(self)
        button = wx.Button(self.panel, label = "Push Me", 
                                pos = (50, 50))
        # Event handlers
        self.Bind(wx.EVT_BUTTON, self.OnButton, button)
        
    def OnButton(self, event):
        #获取应用程序对象App
        print "\nGet the Application Object:"
        app = wx.GetApp()
        print "%s" % repr(app)
        print "\nGet the Frame from the App:"
        #获取主窗口对象MainFrame
        frame = app.GetTopWindow()
        print "%s" % repr(frame)
        
class MyApp(wx.App):
    def OnInit(self):
        self.frame = MyFrame(None, title='The Main Frame')
        self.SetTopWindow(self.frame)
        self.frame.Show()
        
        return True

if __name__ == '__main__':
    app = MyApp(False)
    app.MainLoop()