Added the mainloop() call.

gvanrossum · gvanrossum · commit d24d3fcd03d2 · 1998-09-14T17:52:29.000Z
diff --git a/Demo/tkinter/guido/switch.py b/Demo/tkinter/guido/switch.py
@@ -49,6 +49,7 @@ def main():
     app = App()
     app.addpanel("label", LabelPanel)
     app.addpanel("button", ButtonPanel)
+    app.top.mainloop()
 
 if __name__ == '__main__':
     main()
