python enums with attributes

Question

Consider:

class Item:
   def __init__(self, a, b):
       self.a = a
       self.b = b

class Items:
    GREEN = Item(\'a\', \'b\')
    BLUE = Item(\'c\', \'         


        

Answer 1

For Python 3:

class Status(Enum):
    READY = "ready", "I'm ready to do whatever is needed"
    ERROR = "error", "Something went wrong here"

    def __new__(cls, *args, **kwds):
        obj = object.__new__(cls)
        obj._value_ = args[0]
        return obj

    # ignore the first param since it's already set by __new__
    def __init__(self, _: str, description: str = None):
        self._description_ = description

    def __str__(self):
        return self.value

    # this makes sure that the description is read-only
    @property
    def description(self):
        return self._description_

And you can use it as a standard enum or factory by type:

print(Status.READY)
# ready
print(Status.READY.description)
# I'm ready to do whatever is needed
print(Status("ready")) # this does not create a new object
# ready