[Python-Dev] Re: stdlib Flag Enums and the "no value" member

April 29, 2021


      On 4/29/21 10:35 AM, Jonathan Goble wrote:
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On Thu, Apr 29, 2021 at 1:20 PM Ethan Furman wrote:
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Which raises the question:  Do we want to have a standard name for stdlib Flags when no flags are set?
If you want a flag to represent no flags set, it takes one line to write it yourself, as in this example I copied
verbatim from the docs:
...
...
...
class Color(Flag):
...     BLACK = 0
...     RED = auto()
...     BLUE = auto()
...     GREEN = auto()
...
Color.BLACK
<Color.BLACK: 0>
bool(Color.BLACK)
False
Are you suggesting that the standard name for 0 be 'BLACK'?  ;-)

--
~Ethan~