Hi @fabians, okay sorry about that! So, I can confirm that the Python framework is only for Tobii Desktop Trackers.
Should you wish to develop applications with the VIVE Eye Pro, you will need to use the Unity Framework which is based on C#/C++
Checkout the getting started guide @ https://vr.tobii.com/sdk/develop/unity/getting-started/vive-pro-eye/
and let us know how you get on. Best Wishes.