On 23 November 2017 at 18:11, Greg Ewing <greg.ewing@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.