Make my py script work only on 1 compter

[jefsummers]

I think you are on the right path, but some kinks. What version of Python?
UUID.getnode() gets the MAC address of the computer, which should be unique. However, computers may have more than one interface, and therefore more than one MAC address (wired vs wifi connections, for example).

I suggest reading the documentation on uuid at https://docs.python.org/3/library/uuid.html