Vedran Čačić added the comment:
I suppose you'll also forbid adding new members to Flags, just like Enum does,
right?
(https://docs.python.org/3/library/enum.html#restricted-subclassing-of-enumerations)
Otherwise cropping -1 at a fixed number of bits might be very counterintuitive.
But still, your "simple algorithm" seems too simple. You might easily produce
values you won't be able to interpret.
class ThirdBitMustBeSet(Flags):
FIRST = 5
SECOND = 6
>>> ThirdBitMustBeSet.FIRST | ThirdBitMustBeSet.SECOND
produces error when printing, but otherwise works completely fine. A debugging
nightmare. :-/ I'd at least ensure each bit has a separate name if you're going
to use that scheme.
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<http://bugs.python.org/issue23591>
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