wxPython (and Matplotlib) Strangeness

Question: why the RAM consumption does not decrease when I

    > close the Matplotlib frame? Shouldn't be the gc that takes
    > care of doing such action?

    > Thank you *a lot* for every suggestion, comment, opinion.
    > Sorry for the long post.

This could be a memory leak in the wxagg backend, or it could be a
problem in the way you code it. Please create a minimal
wxagg/matplotlib application that replicates the problem, one that we
can run on our side (just use random data for the plots you make).
Then we should be able to track down the bug.