On Thu, May 24, 2018 at 4:59 PM Matt Arcidy <marcidy@gmail.com> wrote:

On Thu, May 24, 2018, 11:47 Alexander Belopolsky <alexander.belopolsky@gmail.com> wrote:
> But I do have a mathematics background, and I don't remember ever seeing
> "for x = value" used in the sense you mean.

That's so because in mathematics, "for" is spelled ":" as in

${2 a : a \in Z}$
If you can read the above, you should not have trouble reading
${2 a + b : a \in Z : b = 1}$

Inverted "A" is "for all", and colon means "such that". It may be acceptable somewhere to use a colon as you do,

See <https://en.wikipedia.org/wiki/Set_notation>. Also, "[list comprehensions] is Python's way of implementing a well-known notation for sets as used by mathematicians." <https://www.python-course.eu/list_comprehension.php>. Although, the latter uses "|" instead of ":".