In Python 3.3, support auto-numbering of items

[Barry Warsaw]

Since Python 3.3 supports knowing the order of item definitions in the class, we could support auto numbering of items. We still need a syntax to indicate that autonumbering is requested. Possibly:

class Colors(Enum):
   red = None
   blue = None
   green = None

?

[Barry Warsaw (barry)]

Or possibly

from flufl.enum import Enum, auto

class Colors(Enum):
   red = auto
   blue = auto
   green = auto

?

[Barry Warsaw (barry)]

From mfoord:

With a Python 3 metaclass that provides default values for *looked up*
entries you could have this:

class Color(Enum):
    RED, WHITE, BLUE

[Barry Warsaw (barry)]

On python-ideas, Georg Brandl also suggested using ellipses, e.g.

class Colors(Enum):
    red = 1
   green = ...
   blue = ...

(From LP: #1124357)

[Barry Warsaw (barry)]

I'm undecided about this wishlist item, and PEP 435 doesn't support it, so I'm disinclined to add it. Un-milestoning for 3.4.

[Barry Warsaw (barry)]

After further consideration and in consultation with Eli, marking this as Won't Fix since autonumbering really doesn't buy you enough for the added complexity.