matplotlib, wxPanel inside a wxPanel

[Sam]

Hi Daniel,

Thanks very much for your quick response! You're right, it was a case
of the cut-and-paste blues, and me not really knowing what each part of
the code in the examples was actually doing.
A couple of things caught me out: first of all, i wasn't calling
SetSizer and Fit on the right panels...
Secondly, I stuffed up when trying to give graph_panel a parent of
main_panel. It turns out I was actually never doing this, so the
toolbar would appear, but none of the buttons would work.

Thanks again for your comments, they were very helpful,
Cheers
Sam