immutable_namespace.py

from collections import namedtuple

class ImmutableNamespaceMeta(type):
    def __new__(cls, name, bases, dct):
        x = super().__new__(cls, name, bases, dct)
        public = {key: value for key, value in dct.items() if not key.startswith("_")}
        typ_ = namedtuple(name + "Type", public.keys())
        return typ_(**public)


class ImmutableNamespace(metaclass=ImmutableNamespaceMeta):
    FOO = 3
    BAR = "baz"


# TODO(Inheritance doesn't work)