On 01/09/2017 09:18 PM, Steven D'Aprano wrote:
The docs say that enums can be iterated over, but it isn't clear to me whether
they are iterated over in definition order or value order.
If I have:
class MarxBros(Enum):
GROUCHO = 999
CHICO = 5
HARPO = 11
ZEPPO = auto()
GUMMO = -1
GROUCHO, CHICO, HARPO, ZEPPO, GUMMO = list(MarxBros)
In Python 3 it is always definition order. In Python 2 (using the enum34 [1]
backport), the order is either by value if possible, or alphabetical if not --
unless you use the _order_ attribute to set it:
class MarkBros(Enum):
_order_ = 'GROUCHO CHICO HARGPO ZEPPO GUMMO'
GROUCHO = 999
...
On that related note, how would people feel about a method that injects enums
into the given namespace?
MarxBros._inject_(globals())
although maybe
from MarxBros import *
would be more familiar syntax :-)
Or you can do globals().update(MarxBros.__members__).
--
~Ethan~
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