Ryan,
In my (limited) experience, it's dicey to mix pylab's plotting
functionality and the OO API. I guess I'm a little unclear exactly
what your use case is for this. It sounds like you're goal is to
create a library of functions that operate on Figure instances,
perhaps so you can use them both interactively and as part of a
wxPython application.
If that's the case, I'd recommend you try using pylab's gcf() and draw
() to acquire and redraw the current Figure instance from within
IPython. You can also save the return value of pylab's figure(),
which returns a Figure that's already been attached to the
appropriate renderer. This way you can use the OO API for plotting
without having to futz with the drawing machinery directly.
This script might give you some ideas about how to structure your
code. It contains several of the MPL examples re-coded as functions
that accept a Figure instance and use the OO API for plotting.
http://svn.csrri.iit.edu/mr-software/wxmpl/trunk/demos/plotting.py
Ken
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