python enums with attributes

Python 3.4 has a new Enum data type (which has been backported as enum34 and enhanced as aenum¹). Both enum34 and aenum² easily support your use case:

• aenum (Python 2/3)

    import aenum
    class EnumWithAttrs(aenum.AutoNumberEnum):
        _init_ = 'a b'
        GREEN = 'a', 'b'
        BLUE = 'c', 'd'
  

• enum34 (Python 2/3) or standard library enum (Python 3.4+)

    import enum
    class EnumWithAttrs(enum.Enum):
  
        def __new__(cls, *args, **kwds):
            value = len(cls.__members__) + 1
            obj = object.__new__(cls)
            obj._value_ = value
            return obj
        def __init__(self, a, b):
            self.a = a
            self.b = b
  
        GREEN = 'a', 'b'
        BLUE = 'c', 'd'
  

And in use:

>>> EnumWithAttrs.BLUE
<EnumWithAttrs.BLUE: 1>

>>> EnumWithAttrs.BLUE.a
'c'

¹ Disclosure: I am the author of the Python stdlib Enum, the enum34 backport, and the Advanced Enumeration (aenum) library.

² aenum also supports NamedConstants and metaclass-based NamedTuples.