Pass variable as final

Proposal:
The idea is to be able to pass variables as constants, mimicking c++ or rust behaviour such as. And have this be solely as part of the typings ecosystem. It's extremely helpful when reviewing code, or starting to use new codebases.

Issue opened in cpython repo: #113654

fn my_function(mut changeable: &String, unchangeable: &String) {}

In python I suggest the following:

def my_function(changeable: str, unchangeable: Final[str])-> None:
    arguments_that_changes += "world!"
    return arguments_that_changes + argument_that_stays_constant

Inizia leggendo l’issue collegata di CPython #113654 e verificando come viene attualmente usato Final in Python typing. La proposta richiede una specifica definita per le annotazioni dei parametri e una modifica concordata dell’ecosistema typing prima di poter definire l’ambito dell’implementazione; il lavoro sarà considerato completato quando saranno disponibili un design accettato e i corrispondenti aggiornamenti del repository.