One annoyance with mpl in the past is that when running a script, SIGINT would
not kill it (needed to use C-c C-\ instead).
It seems this is now fixed:
Interrupt now gives me:
File "/home/nbecker/.local/lib/python2.7/site-
packages/matplotlib/backends/backend_gtk.py", line 77, in mainloop
gtk.main()
KeyboardInterrupt
Presumably you mean on the qt4 backend? If so, glad to be of some help! 
The change came in in PR #851
(Simple GUI interface enhancements by pelson · Pull Request #851 · matplotlib/matplotlib · GitHub) and
also allows you to close a figure with ctrl+w and make a qt4 figure
fullscreen with "ctrl+f" (actually, just "f" will do, but I have an
ambition to nuke the non-controled versions by default).
UPDATE: I've just noticed that your traceback is showing your backend
as gtk, for which I cannot take any credit (nor do I know the change
which caused this improvement).
···
On 18 July 2012 13:06, Neal Becker <ndbecker2@...149...> wrote:
One annoyance with mpl in the past is that when running a script, SIGINT would
not kill it (needed to use C-c C-\ instead).
It seems this is now fixed:
Interrupt now gives me:
File "/home/nbecker/.local/lib/python2.7/site-
packages/matplotlib/backends/backend_gtk.py", line 77, in mainloop
gtk.main()
KeyboardInterrupt
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