import wx

class Frame(wx.Frame):
    def __init__(self, parent=None, id=-1, title='Title',
                 pos=wx.DefaultPosition, size=(400, 200)):
        wx.Frame.__init__(self, parent, id, title, pos, size)


class App(wx.App):
    def OnInit(self):
        self.frame = Frame()
        self.frame.Show()
        self.SetTopWindow(self.frame)
        return True

def main():
    app = App()
    app.MainLoop()

if __name__ == '__main__':
    main()