Local variable definition in Python list comprehension

[Chris Angelico]

On Fri, 2 Sept 2022 at 02:10, James Tsai <jamestztsai at gmail.com> wrote:
>
> Hello,
>
> I find it very useful if I am allowed to define new local variables in a list comprehension. For example, I wish to have something like
> [(x, y) for x in range(10) for y := x ** 2 if x + y < 80], or
> [(x, y) for x in range(10) with y := x ** 2 if x + y < 80].
>
> For now this functionality can be achieved by writing
> [(x, y) for x in range(10) for y in [x ** 2] if x + y < 80].
>
> Is it worthwhile to add a new feature like this in Python? If so, how can I propose this to PEP?

Not everything has to be a one-liner.

ChrisA