26.05.18 08:07, Ian Kelly пише:
On Fri, May 25, 2018 at 11:00 PM, Chris Angelico <ros...@gmail.com> wrote:
On Sat, May 26, 2018 at 2:46 PM, Steven D'Aprano
<steve+comp.lang.pyt...@pearwood.info> wrote:
Am I silly for wanting to make a single enum?
I have a three-state flag, True, False or Maybe. Is is confusing or bad
practice to make a single enum for the Maybe case?
from enum import Enum
class State(Enum):
Maybe = 2
Maybe = State.Maybe
del State
Is there a better way of handling a three-state flag like this?
Does it need to have a value of 2? If not:
# Tri-state logic
Maybe = object()
The enum has a nice __str__ though.
Not very nice. It contains a reference to non-existing class State. The
repr contains also the unrelevant here value of 2.
If you need just an identifiable singleton and don't bother about the
exact representation, then a list can be enough:
Maybe = ['Maybe']
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