python3: 'where' keyword

[Andrey Tatarinov]

Paul Rubin wrote:
> You mean I can't say
> 
>    # compute sqrt(2) + sqrt(3)
>    x = (sqrt(a) where:
>          a = 2.) \
>        + sqrt (a) where:
>            a = 3.

No, I'd prefer to not embed 'where' into expression.