import wx

class Page(wx.Panel):
    def __init__(self, *args, **kw):
        wx.Panel.__init__(self, *args, **kw)

        b1 = wx.Button(self, -1, "button one")
        b2 = wx.Button(self, -1, "button two")

        self.Sizer = wx.BoxSizer(wx.VERTICAL)
        self.Sizer.Add(b1, 0, wx.ALL, 20)
        self.Sizer.Add(b2, 0, wx.ALL, 20)


class Frame(wx.Frame):
    def __init__(self, *args, **kw):
        wx.Frame.__init__(self, *args, **kw)

        nb = wx.Notebook(self)
        nb.AddPage(Page(nb), "page one")
        nb.AddPage(Page(nb), "page two")
        nb.AddPage(Page(nb), "page three")


app = wx.App(redirect=False)
frm = Frame(None, title="Simple Sample")
frm.Show()
app.MainLoop()