Integrate SQLAlchemy with Enum34

gistfile1.py

class Enum34(types.TypeDecorator):
    impl = types.Integer

    def __init__(self, enum_class, *args, **kwargs):
        super(Enum34, self).__init__(*args, **kwargs)
        self._enum_class = enum_class

    def process_bind_param(self, value, dialect):
        if value not in self._enum_class:
            raise ValueError("Not a valid enum value")
        return value.value

    def process_result_value(self, value, dialect):
        return self._enum_class(value)