Hi, is there a way to use Python to check if there is a link in a User Data field or if it is empty? Thanks.
What do you mean with "use Python"? Are you writing a script, or a plugin, or something else?
You can simply access the user data parameter and see if it is None or not:
link = op[c4d.ID_USERDATA,1]
if link is None:
print("some object linked")
Also: please post questions on the C4D API in CINEMA 4D DEVELOPMENT.
@Swinn is None did the trick. Thanks. :)