z = {a: b
for b in (transform(bi) for bi in bs)
for a in as_}
That works, but I prefer the implicit nesting of a sequence of "comp_for" expressions to a the nested generator.
On Thu, May 31, 2018 at 3:59 AM, Neil Girdhar <mistersheik@gmail.com> wrote:
> This example shows additional flexibility:
>
> z = {a: transformed_b
> for b in bs
> given transformed_b = transform(b)
> for a in as_}
>
> There is no nice, equivalent := version as far as I can tell.
True. However, it took me several readings to understand what you were
doing here. I think I actually prefer "for transformed_b in
[transform(b)]" to this syntax, which is saying something.
I feel you. I think of "given" as an assignment that is in front of the expression, just like "for" (in comp_for) is a for loop that is in front, and "if" (in comp_if) is a condition that is in front.
ChrisA
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