As a reply for your pm and question, there is a python project named talonvoice which created its own usb driver to operate eyetrackers. if you really want to use python, maybe you can find a way to get data using that driver, but i am not sure…
and for your btw, maybe they don’t, or it requires to be quite professional in this area. I have heard rumors that there will be more restrictions on sdk licensing very soon.