Is it possible to define enums without values with Python?

One way is to use the Enum base class as a callable:

Color = Enum('Color', 'RED BLUE GREEN ORANGE')

If you're using Python 3.6 or later, you can use enum.auto():

from enum import Enum, auto

class Color(Enum):
    RED = auto()
    BLUE = auto()

The documentation for the enum library describes this and other useful features like the @unique decorator.

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