[Python-ideas] Should Python have user-defined constants?
sf at fermigier.com
Tue Nov 21 06:12:44 EST 2017
That's one way to do it with no changes to the language, though
syntaxically I find it lacking a bit of elegance (maybe a matter of getting
accustomed with it?).
Also, I'm not sure "Final" really conveys what it means (at first glance, I
thought it was about immutability, not constantness).
Maybe "Const" would be better in this context ? (Or maybe you've discussed
this question already and come to the conclusion that "Final" is better for
On Tue, Nov 21, 2017 at 11:41 AM, Ivan Levkivskyi <levkivskyi at gmail.com>
> On 21 November 2017 at 10:47, Paul Moore <p.f.moore at gmail.com> wrote:
>> -1. I don't see how this would improve any programs I've written or
>> seen. Tools like mypy or linters might benefit from a feature to track
>> constants and ensure they don't get changed
> It is actually likely that something like this will appear in ``typing``:
> from typing import Final, List
> x: Final = 42
> x = 1 # Fails type check
> lst: Final[List[int]] = 
> lst.append(5) # OK
> lst = [1, 2, 3] # Fails type check
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