Because Tkinter is for GUI development on systems, and thereof, there is no plugin for browsers, I do not believe it to be possible to use Tkinter in a client's browser.
If gnuplot.py allows you to save a plot to disk or get the plot's image file as a binary string, it should be possible to send a plot to a client's web browser. HTH, -Wes -- http://mail.python.org/mailman/listinfo/python-list