Hi,

I re-wrote the code to include the code from this branch - it's made everything a lot simpler: https://github.com/ashwinsrnth/petsc-pycuda/blob/master/GPUArray.pyx

If I can help with adding the functionality to `petsc4py`, I'd be glad to :)

thanks for the feedback! I'll clean up the feature branch and propagate the functionality to next tomorrow. Best regards, Karli