Proposed new syntax
BlindAnagram
blindanagram at nowhere.com
Thu Aug 10 13:45:51 EDT 2017
On 10/08/2017 15:28, Steve D'Aprano wrote:
> Every few years, the following syntax comes up for discussion, with some people
> saying it isn't obvious what it would do, and others disagreeing and saying
> that it is obvious. So I thought I'd do an informal survey.
>
> 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, 102, 201, 102, 202, 103, 203, 104, 204
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