How does one kill a python script without killing iPython?

I wrote a script in python with a wx.Frame, and it has an exit function that calls sys.exit() when the user has clicked the close button. I'd like to be able to run 开发者_StackOverflow中文版this script from iPython, but when the user clicks the close button, sys.exit() kills the running python script as well as iPython. What could I use in place of sys.exit() to kill only the python script, not iPython?

Thanks!

I am not familiar with iPython but with a little searching I found a page: http://ipython.scipy.org/moin/InterupptingThreads, I infer from this that all you might have to do is "raise SystemExit".