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Sun Jun 14 01:20:57 CEST 2015 · https://mail.python.org/pipermail/python-dev/2015-June/140494.html

Nick Coghlan wrote:
> I wonder if in 3.6 it might be possible to *add* some bookkeeping to
> "await" and "yield from" expressions that provides external visibility
> into the underlying iterable or coroutine that the generator-iterator
> or coroutine has delegated flow control to.

In my original implementation of yield-from, stack frames
had an f_yieldfrom slot referring to the object being
yielded from.

I gather that slot no longer exists at the C level, but
it ought to be possible to provide a Python attribute or
method returning the same information.

-- 
Greg

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[Python-Dev] Obtaining stack-frames from co-routine objects