Python rpy2 and matplotlib conflict when using multiprocessing

Question

I am trying to calculate and generate plots using multiprocessing. On Linux the code below runs correctly, however on the Mac (ML) it doesn\'t, giving the error below:

Answer 1

This might be rpy2-specific. There are reports of a similar problem with OS X and multiprocessing here and there.

I think that using an initializer that imports the packages needed to run the code in plot could solve the problem (multiprocessing-doc).