-        wxMDIParentFrame.__init__(self, None, -1, "MDI Parent", size=(600,400),
-                                  style = wxDEFAULT_FRAME_STYLE | wxHSCROLL | wxVSCROLL)
+        wx.MDIParentFrame.__init__(
+            self, None, -1, "MDI Parent", size=(600,400),
+            style = wx.DEFAULT_FRAME_STYLE | wx.HSCROLL | wx.VSCROLL
+            )