On Fri, Jul 28, 2017 at 7:22 AM, Pavol Lisy <pavol.lisy@gmail.com> wrote:
On 7/26/17, Steven D'Aprano <steve@pearwood.info> wrote:
[...]
But this has a hidden landmine. If *any* module happens to use ntuple with the same field names as you, but in a different order, you will have mysterious bugs:
x, y, z = spam
You expect x=2, y=1, z=0 because that's the way you defined the field order, but unknown to you some other module got in first and defined it as [z, y, x] and so your code will silently do the wrong thing.
We have: from module import x, y, z # where order is not important
Could we have something similar with ntuple (SimpleNamespace, ...)?
maybe: for x, y, z from spam: print(x, y, z)
What you're asking for is something like JavaScript's "object destructuring" syntax. It would sometimes be cool, but I haven't ever really yearned for it in Python. But you'd need to decide whether you want attributes (spam.x, spam.y) or items (spam["x"], spam["y"]). Both would be useful at different times. ChrisA