[Python-ideas] PEP 572 version 2: Statement-Local Name Bindings

[David Mertz]

On Fri, Mar 2, 2018 at 10:44 AM, Ethan Furman <ethan at stoneleaf.us> wrote:

> On 03/02/2018 09:34 AM, David Mertz wrote:
>
>>     >>> with bind(sqrt(2), log(2)) as (a, b):
>>     ...     print(a, b, a+b)
>>     1.4142135623730951 0.6931471805599453 2.1073607429330403
>>
>> This would cover 98% of the cases that I would want with the proposed
>> statement-local name bindings.
>>
>
> Cool!  But what's the advantage over simple assignment?
>

The only difference from simple assignment is just visual and to be more
self documenting.  Basically, it just says (to me at least): "I intend to
use these name within this block, but don't care about them elsewhere."
It's sort of an informal scope without actual scoping rules.  But of
course, this is just existing Python, and anyone who wants to or doesn't is
free to use or not use that style.  In truth, I've thought about doing it
from time to time, but never actually bothered in production code, just as
a toy.


-- 
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