X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/f6bcfd974ef26faf6f91a62cac09827e09463fd1..3f4f90c2a0c1f274d1918b320132ed0ca2922fe5:/wxPython/demo/viewer_basics.py

diff --git a/wxPython/demo/viewer_basics.py b/wxPython/demo/viewer_basics.py
index fe71140ec3..1dca97130d 100644
--- a/wxPython/demo/viewer_basics.py
+++ b/wxPython/demo/viewer_basics.py
@@ -20,42 +20,50 @@ class VtkFrame(wxFrame):
         coneActor = vtk.vtkActor()
         coneActor.SetMapper(coneMapper)
         ren.AddActor(coneActor)
+
 #---------------------------------------------------------------------------
 wxEVT_ADD_CONE = 25015
 
 def EVT_ADD_CONE(win, func):
     win.Connect(-1, -1, wxEVT_ADD_CONE, func)
 
+
 class AddCone(wxPyEvent):
     def __init__(self):
         wxPyEvent.__init__(self)
         self.SetEventType(wxEVT_ADD_CONE)
 
+
 class HiddenCatcher(wxFrame):
     """
         The "catcher" frame in the second thread.
         It is invisible.  It's only job is to receive
-        Events from the main thread, and create 
+        Events from the main thread, and create
         the appropriate windows.
-    """ 
+    """
     def __init__(self):
-        wxFrame.__init__(self, NULL,-1,'')        
+        wxFrame.__init__(self, None, -1, '')
         EVT_ADD_CONE(self, self.AddCone)
 
-    def AddCone(self,evt): 
+    def AddCone(self,evt):
         add_cone()
+
+
 #---------------------------------------------------------------------------
+
 class SecondThreadApp(wxApp):
     """
         wxApp that lives in the second thread.
-    """    
+    """
     def OnInit(self):
         catcher = HiddenCatcher()
         #self.SetTopWindow(catcher)
         self.catcher =catcher
         return true
+
 #---------------------------------------------------------------------------
 
-def add_cone(): 
-   frame = VtkFrame(NULL, -1, "Cone")
+def add_cone():
+   frame = VtkFrame(None, -1, "Cone")
    frame.Show(true)
+