How can I represent an 'Enum' in Python?

Answer 1

An Enum class can be a one-liner.

class Enum(tuple): __getattr__ = tuple.index

How to use it (forward and reverse lookup, keys, values, items, etc.)

>>> State = Enum(['Unclaimed', 'Claimed'])
>>> State.Claimed
1
>>> State[1]
'Claimed'
>>> State
('Unclaimed', 'Claimed')
>>> range(len(State))
[0, 1]
>>> [(k, State[k]) for k in range(len(State))]
[(0, 'Unclaimed'), (1, 'Claimed')]
>>> [(k, getattr(State, k)) for k in State]
[('Unclaimed', 0), ('Claimed', 1)]