On 2019-06-26 14:27, nate lust wrote:
This is the example I was talking about specifically:
https://github.com/natelust/CloakingVarWriteup/blob/master/examples.py#L76.
There are other possibilities as well, I would be happy to explain my
Ideas directly, I am not sure exactly everything Yanghao is saying as I
have not been able to follow it very closely.
I've been reading this discussion off and on, and just looked at your
example. It only confirms what I've thought since the beginning: none of
the examples or use cases described provide even remotely sufficient
justification for changing the behavior of assignment to a bare name.
They are light years away from being sufficient justification.
In the unlikely event that you want something that can track all the
values that have been assigned to it, I just don't see any reason why
you can't make that thing be an attribute of an object. Then the
descriptor protocol already handles everything under discussion here.
If you don't like typing you can name the object "x" so you just have to
type "x.foo = 1". Adding descriptor-like behavior to bare names
massively increases the potential confusion and, as far as I can see,
the only "benefit" proposed is that you don't have to type a dot.
I'm frankly quite surprised that this discussion has gone on so long.
I just can't see any benefit to any of the proposals that gets anywhere
close to justifying the increased difficulty of reasoning about code
where any assignment to a local variable can call arbitrary code under
the hood.
--
Brendan Barnwell
"Do not follow where the path may lead. Go, instead, where there is no
path, and leave a trail."
--author unknown
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