GTK help

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Hi All,


I need some help, whe trying to run some gtk examples, show below
messages:

Traceback (most recent call last):
  File "D:\Downloads\python\test\pygtk\examples\pygtk-demo\demos\stock_browser.py", line 216, in -toplevel-
    main()
  File "D:\Downloads\python\test\pygtk\examples\pygtk-demo\demos\stock_browser.py", line 160, in main
    model = create_model()
  File "D:\Downloads\python\test\pygtk\examples\pygtk-demo\demos\stock_browser.py", line 33, in create_model
    store = gtk.ListStore(StockItemInfo)
TypeError: could not get typecode from object
>>> 

It show up when I run pygtk\examples\pygtk-demo\demos\stock_browser.py

Could someone help me, what is wrong with my system?

Thank you very much,

*sorry my language is Indonesia, so I haven't good English