2017-11-27 15:39 GMT+03:00 Paul Moore <p.f.moore@gmail.com>:
On 27 November 2017 at 12:31, Kirill Balunov <kirillbalunov@gmail.com> wrote:
As I can see at the moment, these cases should behave differently:
x, y = [1,2,3,4] # must raise ValueError x, y = iter([1,2,3,4]) # should work
But at the same time, it violates current situation. So maybe, as you have said we need special syntax. I will think about it.
I would find this confusing. Consider where you don't have literals:
def f(vals): x, y = vals
data = [1,2,3,4]
f(data) data = iter(data) f(data)
Having the two calls behave differently would be a recipe for errors as someone refactors the calling code.
I can not completely disagree with you, but we all adults here. My first proposal was about generators only, but they are very similar to iterators in their behavior. Whatever it was with this syntax, there will be no difference: def f(vals): x, y = vals data = [1,2,3,4] f(data) data = (i for i in data) f(data) With kind regards, -gdg