Proposed new syntax

[Skip Montanaro]

> What would you expect this syntax to return?
>
> [x + 1 for x in (0, 1, 2, 999, 3, 4) while x < 5]

[1, 2, 3]

> For comparison, what would you expect this to return? (Without actually trying
> it, thank you.)
>
> [x + 1 for x in (0, 1, 2, 999, 3, 4) if x < 5]

[1, 2, 3, 4, 5]

> How about these?
>
> [x + y for x in (0, 1, 2, 999, 3, 4) while x < 5 for y in (100, 200)]

[100, 200, 101, 201, 102, 202]

> [x + y for x in (0, 1, 2, 999, 3, 4) if x < 5 for y in (100, 200)]

[100, 200, 101, 201, 102, 202, 103, 203, 104, 204]

Skip