[Python-ideas] Inline assignments using "given" clauses

[Cameron Simpson]

On 06May2018 02:00, Nick Coghlan <ncoghlan at gmail.com> wrote:
>On 5 May 2018 at 13:36, Tim Peters <tim.peters at gmail.com> wrote:
>> If only one trailing "given" clause can be given per `if` test
>> expression, presumably I couldn't do that without trickery.
>
>I was actually thinking that if we did want to allow multiple assignments,
>and we limited targets to single names, we could just use a comma as a
>separator:
>
>    if diff and g > 1 given diff = x - x_base, g = gcd(diff, n):
>        return g
>
>Similar to import statements, optional parentheses could be included in the
>grammar, allowing the name bindings to be split across multiple lines:
>
>    if diff and g > 1 given (
>        diff = x - x_base,
>        g = gcd(diff, n),
>    ):
>        return g

I'm well behind, but... this! This turns "given" into a +0.8 for me.

That's really nice. It reads clearly too.

I was hitherto in the "expression as name" camp, which I gather is already 
rejected.

Cheers,
Cameron Simpson <cs at cskk.id.au>