enum.py

class Enum(object):
    def __init__(self, **kwargs):
        self._values = set()
        for k, v in kwargs.items():
            setattr(self, k, v)
            self._values.add(v)

    def validate(self, values):
        return set(values).issubset(self._values)


>>> Colors = Enum(RED="red", GREEN="green", BLUE="blue")
>>> Colors.GREEN
'green'
>>> Colors.validate(["red", "yellow"])
False
>>> Colors.validate(["red", "green"])
True