[Python-Dev] PEP-435 reference implementation

[Ethan Furman]

Latest code available at https://bitbucket.org/stoneleaf/aenum.

--> class Color(Enum):
...     red = 1
...     green = 2
...     blue = 3

Enum items are virtual attributes looked by EnumType's __getattr__.  The win here is that

--> Color.red.green.blue

no longer works.  ;)

Subclassing an implemented Enum class now raises an error (is there a better word than 'implemented'?)

--> class MoreColor(Color):
...     cyan = 4
...     magenta = 5
...     yellow = 6

Traceback (most recent call last):
   File "<stdin>", line 1, in <module>
   File "./ref435.py", line 83, in __new__
     raise EnumError("cannot subclass an implemented Enum class")
ref435.EnumError: cannot subclass an implemented Enum class