suggestion for Python graphing package, please

[Stewart Midwinter]

I need a graphing library that I can access from within a Tkinter 
application running on Windows.

It needs to be able to draw some *simple* 2D plots, and then output them to 
a file (e.g. .PNG, .JPG) for inclusion in a HTML-formatted e-mail to 
interested parties. 

Many of the packages that I've looked at a) either don't output to a file, 
or b) are very old (3-5 years), or c) don't run on Windows.

I don't actually care if the library itself is written in Python or c++ or 
something else.

Any suggestions?

thanks,
-- 
Stewart Midwinter
stewart at midwinter.ca
stewart.midwinter at gmail.com
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