The problem: If the last image is a jpeg/raw pair, the code to remove the jpeg from the import list is not run since it is the last image. This is solved by adding an empty line to the images array. It will be counted as new base and therefore the jpeg removal code will be run one more time. I don't know if this is a good solution but I think it solves the problem without adding complexity.
Scripts in this folder are maintained by the darktable community.