A different implementation of constant for python

constant.py

"""
constant.py: A different implementation of constant for python
"""

class ConstantMeta(type):
    """
    Meta Class for Constant, How Constant class would behave
    """

    def __new__(cls, clsname, bases, clsdict):
        """
        adding __keys__, __values__ fields
        and keys(), values() methods
        """
        obj = super().__new__(cls, clsname, bases, clsdict)
        obj.__force_set__("__values__", [])
        obj.__force_set__("__keys__", [])
        for key, val in vars(obj).items():
            if not key.startswith("__"):
                obj.__values__.append(val)
                obj.__keys__.append(key)
        obj.__force_set__("keys", lambda: obj.__keys__)
        obj.__force_set__("values", lambda: obj.__values__)
        return obj

    def __force_set__(self, name, value):
        # A external set method to make sure we can update value in __new__
        return super().__setattr__(name, value)

    def __setattribute__(self, *args, **kwargs):
        # Override set method to make it immutable
        # raise ValueError('Updating Immutable Type')
        pass

    def __setattr__(self, *args, **kwargs):
        # Override set method to make it immutable
        # raise ValueError('Updating Immutable Type')
        pass

    def __setitem__(self, *args, **kwargs):
        # Override set method to make it immutable
        # raise ValueError('Updating Immutable Type')
        pass

    def __set__(self, *args, **kwargs):
        # Override set method to make it immutable
        # raise ValueError('Updating Immutable Type')
        pass

    def __getitem__(cls, key):
        # adding __getitem__ to make objects "subscriptable"
        return getattr(cls, key)

    def __iter__(cls):
        # In case of for loops
        return zip(cls.__keys__, cls.__values__)


class ConstantClass(metaclass=ConstantMeta):
    """
    Now this class can be inhereted whenever required to make constants
    """

    pass


if __name__ == "__main__":
    """
    An Example of how this works
    """

    class Links(ConstantClass):
        GITHUB = "https://github.com/ra101"
        WEB = "https://ra101.github.io/"
        LINKS = "dev.ra.101@protonmail.com"

    class Author(ConstantClass):
        NAME = "〈 RA 〉"
        WEB = Links.WEB
        LINKS = Links

    Links.WEB = 'any_new_value'

    print(f"\nLinks.WEB: {Links.WEB}")
    print(f"\nAuthor.values(): {Author.values()}")
    print(f"\ndict(Author): {dict(Author)}")
    print("\nfor key in Author.LINKS.keys()")
    for key in Author.LINKS.keys():
        print(f'getattr(Author.LINKS, "{key}"): {getattr(Author.LINKS, key)}')

Output:

Links.WEB: https://ra101.github.io/

Author.values(): ['〈 RA 〉', 'https://ra101.github.io/', <__main__.ConstantClass object at 0x00000293A94768E0>]

dict(Author): {'NAME': '〈 RA 〉', 'WEB': 'https://ra101.github.io/', 'LINKS': <__main__.ConstantClass object at 0x00000293A94768E0>}

for key in Author.LINKS.keys()
getattr(Author.LINKS, "GITHUB"): https://github.com/ra101
getattr(Author.LINKS, "WEB"): https://ra101.github.io/
getattr(Author.LINKS, "EMAIL"): dev.ra.101@protonmail.com