What are you using for python? PostGIS? osgeo/gdal? Some of the other libraries like Shapely or pyshp?

Most of our stuff is focused on calculation and interpolation on raster data, so a lot of numpy with appropriate hooks. Porting varies, sometimes it’s as simple as changing a couple of function calls to gdal, sometimes it’s trickier. I’ve only made it through a couple of the simpler tools, like a mesoscale wind map based energy production calculation and a wind resource grid interpolator that were originally standalone anyways. The gdal calls to read and write rasters are pretty easy to use.