using-enum.py

from enum import IntFlag, auto

class Colour(IntFlag):
    R = auto()     # When the class is defined, this'll get the value 1
    G = auto()     # ... and 2
    B = auto()     # ... and 4, and so on
    Cyan = G | B   # You can construct combinations inside the class definition
    def is_blue(self):
        return (self & Colour.B) != 0

# Colour instances behave a bit like integers (although they print differently)
# auto() is magic which causes the constants defined in the class to take on power-of-two values.

>>> colour.B == 4
True

>>> Colour.R
<Colour.R: 1>
>>> Colour.G
<Colour.G: 2>
>>> Colour.B
<Colour.B: 4>
>>> Colour.Cyan
<Colour.Cyan: 6>   # 6 = 4 | 2

# You can use bitwise operations on their members
>>> c = Colour.R | Colour.B
>>> c
<Colour.B|R: 5>

# Then the is_blue method uses that fact to check if a particular bit is set
>>> c.is_blue()
True

>>> Colour.Cyan.is_blue()
True