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 -- https://mail.python.org/mailman/listinfo/python-list
