Hey all,
just wanted to inform you that SR Research has launched a new forum, resulting in breaking all the previous links to information about pylink (e.g., on PsychoPy’s website here). You also have to register with a new account and accounts are checked manually - so register asap 
Eyelink Developers Kit: https://www.sr-support.com/thread-13.html
PyLink User Manual: https://www.sr-support.com/thread-195.html
Step by step instruction for PsychoPy: https://www.sr-support.com/thread-48.html
Best regards,
Mario