Erroe executing a python script

[kususe]

Hi to everyone. 
I'm new in the world of GStreamer and I have a problem. 
Referring to  http://pygstdocs.berlios.de/pygst-tutorial/playbin.html
web-site  , adding the code in the bottom of 2.2 example to the top one,
this error is returned: 

 self.player.set_property("video-sink", bin)
NameError: name 'self' is not defined

an error which I didn't have considering just the first code.


how can I work the problem out?

Thanks in advance

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