[m_mueller]

FYI there is also

    @dataclass(frozen=True)

this tends to be enough for my usecases. you can still circumvent (and sometimes have to in dataclass post_init) with object.__setattr__.

[diegojromero]

I knew about dataclasses when I started writting gelidum, but I wanted to make the immutable objects be from any classes, those under my control or not.

Having said that, I think dataclasses are a better solution for making immutable objects if the class is going to be made from the start.