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MIT 6.189 A Gentle Introduction to Programming Using Python (OCW) 13 Online
OpenStudy (anonymous):

I'm having problems with graphics.py I'm using Mac OS 10.8.2 and Python 2.7 I get the demo window OK but when I close it I get the error message TclError: can't invoke "update" command: application has been destroyed. If I reload Python it works OK until I close it and try to reopen it and I have the same problem.

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