import wx
import sys

class Frame(wx.Frame):

    def __init__(self,parent,id,title):
        print "Frame __init__"
        wx.Frame.__init__(self,parent,id,title)

class App(wx.App):

    def __init__(self,redirect=True,filename=None):
        print "App __init__"
        wx.App.__init__(self,redirect,filename)

    def OnInit(self):
        print "OnInit"
        self.frame = Frame(parent=None, id = -1, title="StartUp")
        self.frame.Show()
        self.SetTopWindow(self.frame)
        print sys.stderr,"A pretend error message"
        return True

    def OnExit(self):s
        print "OnExit"

if __name__ == "__main__":
    app = App(True,"output")
    print "Before MainLoop"
    app.MainLoop()
    print "After MainLoop"