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Question about implementing immutability


If you want to create your own immutable class, maybe inherit from a
namedtuple?

On Wed, Nov 21, 2018 at 11:45 AM Iwo Herka <iwoherka at gmail.com> wrote:

> Hello,
>
> Let's say I want to implement immutability for user-defined class.
> More precisely, a class that can be modified only in its (or its
> super-class') __init__ method. My initial idea was to do it the
> following fashion:
>
>     def __setattr__(self, *args, **kwargs):
>         if sys._getframe(1).f_code.co_name == '__init__':
>             return super().__setattr__(*args, **kwargs)
>         raise AttributeError()
>
> What do you think of this approach? Is there a better one?
> Thanks.
>
> Sincerely,
> Iwo Herka
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>