wxPython - wx.MessageDialog disappears without click

Question

I'm new to wxPython (wxPython 3.0.0.0, python 2.7, Mac OS X), and I'm trying to display a message dialog in the OnInit function of the app. Example scripts I run work just fine using a very similar three-line code block, but when I do it with this one, the message dialog appears for a split second, and disappears. Is there something silly that I'm doing wrong?

import wx

class MyApp(wx.App):

  def __init__(self):
    wx.App.__init__(self, redirect=False)

  def OnInit(self):
    self.rootView = wx.Frame(parent=None, id=-1, title="Wire Frame",
      pos=(150, 150), size=(350, 250))
    self.rootView.Show()
    self.SetTopWindow(self.rootView)
    dlg = wx.MessageDialog(self.rootView, "Hi", "title", wx.OK|wx.ICON_ERROR)
    dlg.ShowModal()
    dlg.Destroy()
    return True

if __name__ == "__main__":
  app = MyApp()
  app.MainLoop()

Edit: Tested this on Ubuntu with wxPython 2.8.12.1, and the behavior is normal there. I'll try and get a newer version on there to test it with. Perhaps this is a bug in wxPython? I've submitted a bug report, so I'll find out soon enough.

Answer 1

What will happen if you treat MessageDialog as if it is say FileDialog or similar?

import wx

class MyApp(wx.App):

  def __init__(self):
    wx.App.__init__(self, redirect=False)

  def OnInit(self):
    self.rootView = wx.Frame(parent=None, id=-1, title="Wire Frame",
      pos=(150, 150), size=(350, 250))
    self.rootView.Show()
    self.SetTopWindow(self.rootView)
    dlg = wx.MessageDialog(self.rootView, "Hi", "title", wx.OK|wx.ICON_ERROR)
    #dlg.ShowModal()
    if dlg.ShowModal() != wx.ID_OK:
        dlg.Destroy()
    return True

if __name__ == "__main__":
  app = MyApp()
  app.MainLoop()

probably just a hackish way to go around but this may work...

At least, this seems to work in the same way in wxpyhon2.8 on Windows.