On Wed, Mar 25, 2020 at 10:08 AM Dan Stromberg <drsali...@gmail.com> wrote: > > Some time ago, when I first heard about yield from, it wasn't faster than a > for loop yielding. > > Has that improved?
It's not about speed. It's about correctness, and the way it delegates everything, not just "for x in iter: yield x". Here's what it's actually equivalent to: https://www.python.org/dev/peps/pep-0380/#formal-semantics It'll be a LOT more efficient than writing all that out manually. For the simple case where you really can just loop and yield, sure, though IMO it's still clearer to yield-from than to loop-yield. ChrisA -- https://mail.python.org/mailman/listinfo/python-list
