ARTICLE AD BOX
See wiki article. I have a class that very naturally wants properties which are True, False, or ??. I would like to:
use logical operators is, or, and, and not as usual
stay relatively self-contained, ideally standard lib
I expected to be able to use None, but unfortunately None or False and False or None evaluate to different things (only one of which is what I wanted). What can I do?
I've considered creating a custom 'unknown' class, but I can't overwrite the logical operator behavior.
I've found external libraries like trinary, but they use the |,& syntax instead.
I note this is the logic of a NULL value in SQL, so presumably practices to mimic that behavior would work here.
