PEP-435, Python Enum, has been approved and will be implemented (apparently) in Python 3.4: this is quite a change and, at least in my opinion, a long overdue language feature.
In future, one can avoid doing something ugly like this:
(months.py) JANUARY = 1 FEBRUARY = 2 ... DECEMBER = 12
then, in another module:
import months ... if month == months.JANUARY: print 'What is three times January?' return 3 * month
This would work today and make, obviously, perfect sense, right?
Enum instea, this would be written:
from enum import Enum class Month(Enum): january = 1 ... december = 12 month = Month.january print month # prints 'Month.january' print 3 * month # raises an exception
Go check out the PEP!