import wx
import wx.lib.agw.infobar as IB

class MyFrame(wx.Frame):

    def __init__(self, parent):

        wx.Frame.__init__(self, parent, -1, 'InfoBar Demo')

        self._infoBar = IB.InfoBar(self)

        sizer = wx.BoxSizer(wx.VERTICAL)
        sizer.AddF(self._infoBar, wx.SizerFlags().Expand())

        panel = wx.Panel(self)
        sizer.Add(panel, 1, wx.EXPAND)
        
        # ... Add other frame controls to the sizer ...
        self.SetSizer(sizer)

        wx.CallLater(2000, self.SomeMethod)
        

    def SomeMethod(self):

        self._infoBar.ShowMessage("Something happened", wx.ICON_INFORMATION)


# our normal wxApp-derived class, as usual

app = wx.PySimpleApp()

frame = MyFrame(None)
app.SetTopWindow(frame)
frame.Show()

app.MainLoop()