On 23 November 2017 at 12:38, Ivan Levkivskyi <levkivs...@gmail.com> wrote:
> On 23 November 2017 at 11:55, Nick Coghlan <ncogh...@gmail.com> wrote: > >> On 23 November 2017 at 18:11, Greg Ewing <greg.ew...@canterbury.ac.nz> >> wrote: >> >>> Ivan Levkivskyi wrote: >>> >>>> "People sometimes want to refactor for-loops containing `yield` into a >>>> comprehension but that doesn't work (particularly because of the hidden >>>> function scope) - lets make it a SyntaxError" >>>> >>> >>> Personally I'd be fine with removing the implicit function >>> scope from comprehensions and allowing yield in them, since >>> the semantics of that are clear. >>> >> >> People keep saying this, but seriously, those semantics aren't clear at >> all once you actually start trying to implement it. >> >> > If Serhiy will implement his idea (emitting for-loop bytecode inside a > try-finally), then I see no problems accepting it as a fix. > Also I think it makes sense to keep discussion in one place, i.e. either here xor at https://bugs.python.org/issue10544 -- Ivan
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