[Python-ideas] PEP 380 alternative: A yielding function

[Anders J. Munch]

Guido van Rossum wrote:
 > Have you really thought through the implementation in CPython?

Not at all.

 > When a
 > non-generator function is called, there's usually a C stack frame in
 > the way which prevents yielding.

Of course.  I knew there'd be good reason why you didn't do a more
full coroutine implementation originally, but on a beautiful summer
day reckless optimism took over and it didn't come readily to mind.

On platforms with coroutines available at the C level, I think
something could be devised, something like keep a pool of coroutines
and switch to a different one at strategic points.  But I realise that
requiring all platforms to support coroutines is a deal-breaker, so
there.

- Anders